| 1 | /* Job execution and handling for GNU Make.
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| 2 | Copyright (C) 1988-2016 Free Software Foundation, Inc.
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| 3 | This file is part of GNU Make.
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| 4 |
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| 5 | GNU Make is free software; you can redistribute it and/or modify it under the
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| 6 | terms of the GNU General Public License as published by the Free Software
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| 7 | Foundation; either version 3 of the License, or (at your option) any later
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| 8 | version.
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| 9 |
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| 10 | GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
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| 11 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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| 12 | A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU General Public License along with
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| 15 | this program. If not, see <http://www.gnu.org/licenses/>. */
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| 16 |
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| 17 | #include "makeint.h"
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| 18 |
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| 19 | #include <assert.h>
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| 20 |
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| 21 | #include "job.h"
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| 22 | #include "debug.h"
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| 23 | #include "filedef.h"
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| 24 | #include "commands.h"
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| 25 | #include "variable.h"
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| 26 | #include "os.h"
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| 27 |
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| 28 | #include <string.h>
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| 29 |
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| 30 | /* Default shell to use. */
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| 31 | #ifdef WINDOWS32
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| 32 | #include <windows.h>
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| 33 |
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| 34 | const char *default_shell = "sh.exe";
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| 35 | int no_default_sh_exe = 1;
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| 36 | int batch_mode_shell = 1;
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| 37 | HANDLE main_thread;
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| 38 |
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| 39 | #elif defined (_AMIGA)
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| 40 |
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| 41 | const char *default_shell = "";
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| 42 | extern int MyExecute (char **);
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| 43 | int batch_mode_shell = 0;
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| 44 |
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| 45 | #elif defined (__MSDOS__)
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| 46 |
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| 47 | /* The default shell is a pointer so we can change it if Makefile
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| 48 | says so. It is without an explicit path so we get a chance
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| 49 | to search the $PATH for it (since MSDOS doesn't have standard
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| 50 | directories we could trust). */
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| 51 | const char *default_shell = "command.com";
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| 52 | int batch_mode_shell = 0;
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| 53 |
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| 54 | #elif defined (__EMX__)
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| 55 |
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| 56 | const char *default_shell = "/bin/sh";
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| 57 | int batch_mode_shell = 0;
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| 58 |
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| 59 | #elif defined (VMS)
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| 60 |
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| 61 | # include <descrip.h>
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| 62 | # include <stsdef.h>
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| 63 | const char *default_shell = "";
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| 64 | int batch_mode_shell = 0;
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| 65 |
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| 66 | #define strsignal vms_strsignal
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| 67 | char * vms_strsignal (int status);
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| 68 |
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| 69 | #ifndef C_FACILITY_NO
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| 70 | # define C_FACILITY_NO 0x350000
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| 71 | #endif
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| 72 | #ifndef VMS_POSIX_EXIT_MASK
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| 73 | # define VMS_POSIX_EXIT_MASK (C_FACILITY_NO | 0xA000)
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| 74 | #endif
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| 75 |
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| 76 | #else
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| 77 |
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| 78 | const char *default_shell = "/bin/sh";
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| 79 | int batch_mode_shell = 0;
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| 80 |
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| 81 | #endif
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| 82 |
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| 83 | #ifdef __MSDOS__
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| 84 | # include <process.h>
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| 85 | static int execute_by_shell;
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| 86 | static int dos_pid = 123;
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| 87 | int dos_status;
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| 88 | int dos_command_running;
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| 89 | #endif /* __MSDOS__ */
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| 90 |
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| 91 | #ifdef _AMIGA
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| 92 | # include <proto/dos.h>
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| 93 | static int amiga_pid = 123;
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| 94 | static int amiga_status;
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| 95 | static char amiga_bname[32];
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| 96 | static int amiga_batch_file;
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| 97 | #endif /* Amiga. */
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| 98 |
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| 99 | #ifdef VMS
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| 100 | # ifndef __GNUC__
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| 101 | # include <processes.h>
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| 102 | # endif
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| 103 | # include <starlet.h>
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| 104 | # include <lib$routines.h>
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| 105 | static void vmsWaitForChildren (int *);
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| 106 | #endif
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| 107 |
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| 108 | #ifdef WINDOWS32
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| 109 | # include <windows.h>
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| 110 | # include <io.h>
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| 111 | # include <process.h>
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| 112 | # include "sub_proc.h"
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| 113 | # include "w32err.h"
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| 114 | # include "pathstuff.h"
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| 115 | # define WAIT_NOHANG 1
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| 116 | #endif /* WINDOWS32 */
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| 117 |
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| 118 | #ifdef __EMX__
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| 119 | # include <process.h>
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| 120 | #endif
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| 121 |
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| 122 | #if defined (HAVE_SYS_WAIT_H) || defined (HAVE_UNION_WAIT)
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| 123 | # include <sys/wait.h>
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| 124 | #endif
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| 125 |
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| 126 | #ifdef HAVE_WAITPID
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| 127 | # define WAIT_NOHANG(status) waitpid (-1, (status), WNOHANG)
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| 128 | #else /* Don't have waitpid. */
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| 129 | # ifdef HAVE_WAIT3
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| 130 | # ifndef wait3
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| 131 | extern int wait3 ();
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| 132 | # endif
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| 133 | # define WAIT_NOHANG(status) wait3 ((status), WNOHANG, (struct rusage *) 0)
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| 134 | # endif /* Have wait3. */
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| 135 | #endif /* Have waitpid. */
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| 136 |
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| 137 | #if !defined (wait) && !defined (POSIX)
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| 138 | int wait ();
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| 139 | #endif
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| 140 |
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| 141 | #ifndef HAVE_UNION_WAIT
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| 142 |
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| 143 | # define WAIT_T int
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| 144 |
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| 145 | # ifndef WTERMSIG
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| 146 | # define WTERMSIG(x) ((x) & 0x7f)
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| 147 | # endif
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| 148 | # ifndef WCOREDUMP
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| 149 | # define WCOREDUMP(x) ((x) & 0x80)
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| 150 | # endif
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| 151 | # ifndef WEXITSTATUS
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| 152 | # define WEXITSTATUS(x) (((x) >> 8) & 0xff)
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| 153 | # endif
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| 154 | # ifndef WIFSIGNALED
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| 155 | # define WIFSIGNALED(x) (WTERMSIG (x) != 0)
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| 156 | # endif
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| 157 | # ifndef WIFEXITED
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| 158 | # define WIFEXITED(x) (WTERMSIG (x) == 0)
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| 159 | # endif
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| 160 |
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| 161 | #else /* Have 'union wait'. */
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| 162 |
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| 163 | # define WAIT_T union wait
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| 164 | # ifndef WTERMSIG
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| 165 | # define WTERMSIG(x) ((x).w_termsig)
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| 166 | # endif
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| 167 | # ifndef WCOREDUMP
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| 168 | # define WCOREDUMP(x) ((x).w_coredump)
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| 169 | # endif
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| 170 | # ifndef WEXITSTATUS
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| 171 | # define WEXITSTATUS(x) ((x).w_retcode)
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| 172 | # endif
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| 173 | # ifndef WIFSIGNALED
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| 174 | # define WIFSIGNALED(x) (WTERMSIG(x) != 0)
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| 175 | # endif
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| 176 | # ifndef WIFEXITED
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| 177 | # define WIFEXITED(x) (WTERMSIG(x) == 0)
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| 178 | # endif
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| 179 |
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| 180 | #endif /* Don't have 'union wait'. */
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| 181 |
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| 182 | #if !defined(HAVE_UNISTD_H) && !defined(WINDOWS32)
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| 183 | int dup2 ();
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| 184 | int execve ();
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| 185 | void _exit ();
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| 186 | # ifndef VMS
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| 187 | int geteuid ();
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| 188 | int getegid ();
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| 189 | int setgid ();
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| 190 | int getgid ();
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| 191 | # endif
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| 192 | #endif
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| 193 |
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| 194 | /* Different systems have different requirements for pid_t.
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| 195 | Plus we have to support gettext string translation... Argh. */
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| 196 | static const char *
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| 197 | pid2str (pid_t pid)
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| 198 | {
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| 199 | static char pidstring[100];
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| 200 | #if defined(WINDOWS32) && (__GNUC__ > 3 || _MSC_VER > 1300)
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| 201 | /* %Id is only needed for 64-builds, which were not supported by
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| 202 | older versions of Windows compilers. */
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| 203 | sprintf (pidstring, "%Id", pid);
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| 204 | #else
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| 205 | sprintf (pidstring, "%lu", (unsigned long) pid);
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| 206 | #endif
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| 207 | return pidstring;
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| 208 | }
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| 209 |
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| 210 | #ifndef HAVE_GETLOADAVG
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| 211 | int getloadavg (double loadavg[], int nelem);
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| 212 | #endif
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| 213 |
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| 214 | static void free_child (struct child *);
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| 215 | static void start_job_command (struct child *child);
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| 216 | static int load_too_high (void);
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| 217 | static int job_next_command (struct child *);
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| 218 | static int start_waiting_job (struct child *);
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| 219 | |
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| 220 |
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| 221 | /* Chain of all live (or recently deceased) children. */
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| 222 |
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| 223 | struct child *children = 0;
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| 224 |
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| 225 | /* Number of children currently running. */
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| 226 |
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| 227 | unsigned int job_slots_used = 0;
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| 228 |
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| 229 | /* Nonzero if the 'good' standard input is in use. */
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| 230 |
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| 231 | static int good_stdin_used = 0;
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| 232 |
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| 233 | /* Chain of children waiting to run until the load average goes down. */
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| 234 |
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| 235 | static struct child *waiting_jobs = 0;
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| 236 |
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| 237 | /* Non-zero if we use a *real* shell (always so on Unix). */
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| 238 |
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| 239 | int unixy_shell = 1;
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| 240 |
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| 241 | /* Number of jobs started in the current second. */
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| 242 |
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| 243 | unsigned long job_counter = 0;
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| 244 |
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| 245 | /* Number of jobserver tokens this instance is currently using. */
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| 246 |
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| 247 | unsigned int jobserver_tokens = 0;
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| 248 | |
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| 249 |
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| 250 |
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| 251 | #ifdef WINDOWS32
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| 252 | /*
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| 253 | * The macro which references this function is defined in makeint.h.
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| 254 | */
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| 255 | int
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| 256 | w32_kill (pid_t pid, int sig)
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| 257 | {
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| 258 | return ((process_kill ((HANDLE)pid, sig) == TRUE) ? 0 : -1);
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| 259 | }
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| 260 |
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| 261 | /* This function creates a temporary file name with an extension specified
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| 262 | * by the unixy arg.
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| 263 | * Return an xmalloc'ed string of a newly created temp file and its
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| 264 | * file descriptor, or die. */
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| 265 | static char *
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| 266 | create_batch_file (char const *base, int unixy, int *fd)
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| 267 | {
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| 268 | const char *const ext = unixy ? "sh" : "bat";
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| 269 | const char *error_string = NULL;
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| 270 | char temp_path[MAXPATHLEN]; /* need to know its length */
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| 271 | unsigned path_size = GetTempPath (sizeof temp_path, temp_path);
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| 272 | int path_is_dot = 0;
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| 273 | /* The following variable is static so we won't try to reuse a name
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| 274 | that was generated a little while ago, because that file might
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| 275 | not be on disk yet, since we use FILE_ATTRIBUTE_TEMPORARY below,
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| 276 | which tells the OS it doesn't need to flush the cache to disk.
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| 277 | If the file is not yet on disk, we might think the name is
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| 278 | available, while it really isn't. This happens in parallel
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| 279 | builds, where Make doesn't wait for one job to finish before it
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| 280 | launches the next one. */
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| 281 | static unsigned uniq = 0;
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| 282 | static int second_loop = 0;
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| 283 | const unsigned sizemax = strlen (base) + strlen (ext) + 10;
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| 284 |
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| 285 | if (path_size == 0)
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| 286 | {
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| 287 | path_size = GetCurrentDirectory (sizeof temp_path, temp_path);
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| 288 | path_is_dot = 1;
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| 289 | }
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| 290 |
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| 291 | ++uniq;
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| 292 | if (uniq >= 0x10000 && !second_loop)
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| 293 | {
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| 294 | /* If we already had 64K batch files in this
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| 295 | process, make a second loop through the numbers,
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| 296 | looking for free slots, i.e. files that were
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| 297 | deleted in the meantime. */
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| 298 | second_loop = 1;
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| 299 | uniq = 1;
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| 300 | }
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| 301 | while (path_size > 0 &&
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| 302 | path_size + sizemax < sizeof temp_path &&
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| 303 | !(uniq >= 0x10000 && second_loop))
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| 304 | {
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| 305 | unsigned size = sprintf (temp_path + path_size,
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| 306 | "%s%s-%x.%s",
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| 307 | temp_path[path_size - 1] == '\\' ? "" : "\\",
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| 308 | base, uniq, ext);
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| 309 | HANDLE h = CreateFile (temp_path, /* file name */
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| 310 | GENERIC_READ | GENERIC_WRITE, /* desired access */
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| 311 | 0, /* no share mode */
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| 312 | NULL, /* default security attributes */
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| 313 | CREATE_NEW, /* creation disposition */
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| 314 | FILE_ATTRIBUTE_NORMAL | /* flags and attributes */
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| 315 | FILE_ATTRIBUTE_TEMPORARY, /* we'll delete it */
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| 316 | NULL); /* no template file */
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| 317 |
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| 318 | if (h == INVALID_HANDLE_VALUE)
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| 319 | {
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| 320 | const DWORD er = GetLastError ();
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| 321 |
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| 322 | if (er == ERROR_FILE_EXISTS || er == ERROR_ALREADY_EXISTS)
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| 323 | {
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| 324 | ++uniq;
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| 325 | if (uniq == 0x10000 && !second_loop)
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| 326 | {
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| 327 | second_loop = 1;
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| 328 | uniq = 1;
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| 329 | }
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| 330 | }
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| 331 |
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| 332 | /* the temporary path is not guaranteed to exist */
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| 333 | else if (path_is_dot == 0)
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| 334 | {
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| 335 | path_size = GetCurrentDirectory (sizeof temp_path, temp_path);
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| 336 | path_is_dot = 1;
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| 337 | }
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| 338 |
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| 339 | else
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| 340 | {
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| 341 | error_string = map_windows32_error_to_string (er);
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| 342 | break;
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| 343 | }
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| 344 | }
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| 345 | else
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| 346 | {
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| 347 | const unsigned final_size = path_size + size + 1;
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| 348 | char *const path = xmalloc (final_size);
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| 349 | memcpy (path, temp_path, final_size);
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| 350 | *fd = _open_osfhandle ((intptr_t)h, 0);
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| 351 | if (unixy)
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| 352 | {
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| 353 | char *p;
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| 354 | int ch;
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| 355 | for (p = path; (ch = *p) != 0; ++p)
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| 356 | if (ch == '\\')
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| 357 | *p = '/';
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| 358 | }
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| 359 | return path; /* good return */
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| 360 | }
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| 361 | }
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| 362 |
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| 363 | *fd = -1;
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| 364 | if (error_string == NULL)
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| 365 | error_string = _("Cannot create a temporary file\n");
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| 366 | O (fatal, NILF, error_string);
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| 367 |
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| 368 | /* not reached */
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| 369 | return NULL;
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| 370 | }
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| 371 | #endif /* WINDOWS32 */
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| 372 |
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| 373 | #ifdef __EMX__
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| 374 | /* returns whether path is assumed to be a unix like shell. */
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| 375 | int
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| 376 | _is_unixy_shell (const char *path)
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| 377 | {
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| 378 | /* list of non unix shells */
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| 379 | const char *known_os2shells[] = {
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| 380 | "cmd.exe",
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| 381 | "cmd",
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| 382 | "4os2.exe",
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| 383 | "4os2",
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| 384 | "4dos.exe",
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| 385 | "4dos",
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| 386 | "command.com",
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| 387 | "command",
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| 388 | NULL
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| 389 | };
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| 390 |
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| 391 | /* find the rightmost '/' or '\\' */
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| 392 | const char *name = strrchr (path, '/');
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| 393 | const char *p = strrchr (path, '\\');
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| 394 | unsigned i;
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| 395 |
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| 396 | if (name && p) /* take the max */
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| 397 | name = (name > p) ? name : p;
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| 398 | else if (p) /* name must be 0 */
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| 399 | name = p;
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| 400 | else if (!name) /* name and p must be 0 */
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| 401 | name = path;
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| 402 |
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| 403 | if (*name == '/' || *name == '\\') name++;
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| 404 |
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| 405 | i = 0;
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| 406 | while (known_os2shells[i] != NULL)
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| 407 | {
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| 408 | if (strcasecmp (name, known_os2shells[i]) == 0)
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| 409 | return 0; /* not a unix shell */
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| 410 | i++;
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| 411 | }
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| 412 |
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| 413 | /* in doubt assume a unix like shell */
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| 414 | return 1;
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| 415 | }
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| 416 | #endif /* __EMX__ */
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| 417 |
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| 418 | /* determines whether path looks to be a Bourne-like shell. */
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| 419 | int
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| 420 | is_bourne_compatible_shell (const char *path)
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| 421 | {
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| 422 | /* List of known POSIX (or POSIX-ish) shells. */
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| 423 | static const char *unix_shells[] = {
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| 424 | "sh",
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| 425 | "bash",
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| 426 | "ksh",
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| 427 | "rksh",
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| 428 | "zsh",
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| 429 | "ash",
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| 430 | "dash",
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| 431 | NULL
|
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| 432 | };
|
|---|
| 433 | const char **s;
|
|---|
| 434 |
|
|---|
| 435 | /* find the rightmost '/' or '\\' */
|
|---|
| 436 | const char *name = strrchr (path, '/');
|
|---|
| 437 | char *p = strrchr (path, '\\');
|
|---|
| 438 |
|
|---|
| 439 | if (name && p) /* take the max */
|
|---|
| 440 | name = (name > p) ? name : p;
|
|---|
| 441 | else if (p) /* name must be 0 */
|
|---|
| 442 | name = p;
|
|---|
| 443 | else if (!name) /* name and p must be 0 */
|
|---|
| 444 | name = path;
|
|---|
| 445 |
|
|---|
| 446 | if (*name == '/' || *name == '\\')
|
|---|
| 447 | ++name;
|
|---|
| 448 |
|
|---|
| 449 | /* this should be able to deal with extensions on Windows-like systems */
|
|---|
| 450 | for (s = unix_shells; *s != NULL; ++s)
|
|---|
| 451 | {
|
|---|
| 452 | #if defined(WINDOWS32) || defined(__MSDOS__)
|
|---|
| 453 | unsigned int len = strlen (*s);
|
|---|
| 454 | if ((strlen (name) >= len && STOP_SET (name[len], MAP_DOT|MAP_NUL))
|
|---|
| 455 | && strncasecmp (name, *s, len) == 0)
|
|---|
| 456 | #else
|
|---|
| 457 | if (strcmp (name, *s) == 0)
|
|---|
| 458 | #endif
|
|---|
| 459 | return 1; /* a known unix-style shell */
|
|---|
| 460 | }
|
|---|
| 461 |
|
|---|
| 462 | /* if not on the list, assume it's not a Bourne-like shell */
|
|---|
| 463 | return 0;
|
|---|
| 464 | }
|
|---|
| 465 |
|
|---|
| 466 | |
|---|
| 467 |
|
|---|
| 468 | /* Write an error message describing the exit status given in
|
|---|
| 469 | EXIT_CODE, EXIT_SIG, and COREDUMP, for the target TARGET_NAME.
|
|---|
| 470 | Append "(ignored)" if IGNORED is nonzero. */
|
|---|
| 471 |
|
|---|
| 472 | static void
|
|---|
| 473 | child_error (struct child *child,
|
|---|
| 474 | int exit_code, int exit_sig, int coredump, int ignored)
|
|---|
| 475 | {
|
|---|
| 476 | const char *pre = "*** ";
|
|---|
| 477 | const char *post = "";
|
|---|
| 478 | const char *dump = "";
|
|---|
| 479 | const struct file *f = child->file;
|
|---|
| 480 | const floc *flocp = &f->cmds->fileinfo;
|
|---|
| 481 | const char *nm;
|
|---|
| 482 | size_t l;
|
|---|
| 483 |
|
|---|
| 484 | if (ignored && silent_flag)
|
|---|
| 485 | return;
|
|---|
| 486 |
|
|---|
| 487 | if (exit_sig && coredump)
|
|---|
| 488 | dump = _(" (core dumped)");
|
|---|
| 489 |
|
|---|
| 490 | if (ignored)
|
|---|
| 491 | {
|
|---|
| 492 | pre = "";
|
|---|
| 493 | post = _(" (ignored)");
|
|---|
| 494 | }
|
|---|
| 495 |
|
|---|
| 496 | if (! flocp->filenm)
|
|---|
| 497 | nm = _("<builtin>");
|
|---|
| 498 | else
|
|---|
| 499 | {
|
|---|
| 500 | char *a = alloca (strlen (flocp->filenm) + 1 + 11 + 1);
|
|---|
| 501 | sprintf (a, "%s:%lu", flocp->filenm, flocp->lineno + flocp->offset);
|
|---|
| 502 | nm = a;
|
|---|
| 503 | }
|
|---|
| 504 |
|
|---|
| 505 | l = strlen (pre) + strlen (nm) + strlen (f->name) + strlen (post);
|
|---|
| 506 |
|
|---|
| 507 | OUTPUT_SET (&child->output);
|
|---|
| 508 |
|
|---|
| 509 | show_goal_error ();
|
|---|
| 510 |
|
|---|
| 511 | if (exit_sig == 0)
|
|---|
| 512 | error (NILF, l + INTSTR_LENGTH,
|
|---|
| 513 | _("%s[%s: %s] Error %d%s"), pre, nm, f->name, exit_code, post);
|
|---|
| 514 | else
|
|---|
| 515 | {
|
|---|
| 516 | const char *s = strsignal (exit_sig);
|
|---|
| 517 | error (NILF, l + strlen (s) + strlen (dump),
|
|---|
| 518 | "%s[%s: %s] %s%s%s", pre, nm, f->name, s, dump, post);
|
|---|
| 519 | }
|
|---|
| 520 |
|
|---|
| 521 | OUTPUT_UNSET ();
|
|---|
| 522 | }
|
|---|
| 523 | |
|---|
| 524 |
|
|---|
| 525 |
|
|---|
| 526 | /* Handle a dead child. This handler may or may not ever be installed.
|
|---|
| 527 |
|
|---|
| 528 | If we're using the jobserver feature without pselect(), we need it.
|
|---|
| 529 | First, installing it ensures the read will interrupt on SIGCHLD. Second,
|
|---|
| 530 | we close the dup'd read FD to ensure we don't enter another blocking read
|
|---|
| 531 | without reaping all the dead children. In this case we don't need the
|
|---|
| 532 | dead_children count.
|
|---|
| 533 |
|
|---|
| 534 | If we don't have either waitpid or wait3, then make is unreliable, but we
|
|---|
| 535 | use the dead_children count to reap children as best we can. */
|
|---|
| 536 |
|
|---|
| 537 | static unsigned int dead_children = 0;
|
|---|
| 538 |
|
|---|
| 539 | RETSIGTYPE
|
|---|
| 540 | child_handler (int sig UNUSED)
|
|---|
| 541 | {
|
|---|
| 542 | ++dead_children;
|
|---|
| 543 |
|
|---|
| 544 | jobserver_signal ();
|
|---|
| 545 |
|
|---|
| 546 | #ifdef __EMX__
|
|---|
| 547 | /* The signal handler must called only once! */
|
|---|
| 548 | signal (SIGCHLD, SIG_DFL);
|
|---|
| 549 | #endif
|
|---|
| 550 | }
|
|---|
| 551 |
|
|---|
| 552 | extern pid_t shell_function_pid;
|
|---|
| 553 |
|
|---|
| 554 | /* Reap all dead children, storing the returned status and the new command
|
|---|
| 555 | state ('cs_finished') in the 'file' member of the 'struct child' for the
|
|---|
| 556 | dead child, and removing the child from the chain. In addition, if BLOCK
|
|---|
| 557 | nonzero, we block in this function until we've reaped at least one
|
|---|
| 558 | complete child, waiting for it to die if necessary. If ERR is nonzero,
|
|---|
| 559 | print an error message first. */
|
|---|
| 560 |
|
|---|
| 561 | void
|
|---|
| 562 | reap_children (int block, int err)
|
|---|
| 563 | {
|
|---|
| 564 | #ifndef WINDOWS32
|
|---|
| 565 | WAIT_T status;
|
|---|
| 566 | #endif
|
|---|
| 567 | /* Initially, assume we have some. */
|
|---|
| 568 | int reap_more = 1;
|
|---|
| 569 |
|
|---|
| 570 | #ifdef WAIT_NOHANG
|
|---|
| 571 | # define REAP_MORE reap_more
|
|---|
| 572 | #else
|
|---|
| 573 | # define REAP_MORE dead_children
|
|---|
| 574 | #endif
|
|---|
| 575 |
|
|---|
| 576 | /* As long as:
|
|---|
| 577 |
|
|---|
| 578 | We have at least one child outstanding OR a shell function in progress,
|
|---|
| 579 | AND
|
|---|
| 580 | We're blocking for a complete child OR there are more children to reap
|
|---|
| 581 |
|
|---|
| 582 | we'll keep reaping children. */
|
|---|
| 583 |
|
|---|
| 584 | while ((children != 0 || shell_function_pid != 0)
|
|---|
| 585 | && (block || REAP_MORE))
|
|---|
| 586 | {
|
|---|
| 587 | unsigned int remote = 0;
|
|---|
| 588 | pid_t pid;
|
|---|
| 589 | int exit_code, exit_sig, coredump;
|
|---|
| 590 | struct child *lastc, *c;
|
|---|
| 591 | int child_failed;
|
|---|
| 592 | int any_remote, any_local;
|
|---|
| 593 | int dontcare;
|
|---|
| 594 |
|
|---|
| 595 | if (err && block)
|
|---|
| 596 | {
|
|---|
| 597 | static int printed = 0;
|
|---|
| 598 |
|
|---|
| 599 | /* We might block for a while, so let the user know why.
|
|---|
| 600 | Only print this message once no matter how many jobs are left. */
|
|---|
| 601 | fflush (stdout);
|
|---|
| 602 | if (!printed)
|
|---|
| 603 | O (error, NILF, _("*** Waiting for unfinished jobs...."));
|
|---|
| 604 | printed = 1;
|
|---|
| 605 | }
|
|---|
| 606 |
|
|---|
| 607 | /* We have one less dead child to reap. As noted in
|
|---|
| 608 | child_handler() above, this count is completely unimportant for
|
|---|
| 609 | all modern, POSIX-y systems that support wait3() or waitpid().
|
|---|
| 610 | The rest of this comment below applies only to early, broken
|
|---|
| 611 | pre-POSIX systems. We keep the count only because... it's there...
|
|---|
| 612 |
|
|---|
| 613 | The test and decrement are not atomic; if it is compiled into:
|
|---|
| 614 | register = dead_children - 1;
|
|---|
| 615 | dead_children = register;
|
|---|
| 616 | a SIGCHLD could come between the two instructions.
|
|---|
| 617 | child_handler increments dead_children.
|
|---|
| 618 | The second instruction here would lose that increment. But the
|
|---|
| 619 | only effect of dead_children being wrong is that we might wait
|
|---|
| 620 | longer than necessary to reap a child, and lose some parallelism;
|
|---|
| 621 | and we might print the "Waiting for unfinished jobs" message above
|
|---|
| 622 | when not necessary. */
|
|---|
| 623 |
|
|---|
| 624 | if (dead_children > 0)
|
|---|
| 625 | --dead_children;
|
|---|
| 626 |
|
|---|
| 627 | any_remote = 0;
|
|---|
| 628 | any_local = shell_function_pid != 0;
|
|---|
| 629 | for (c = children; c != 0; c = c->next)
|
|---|
| 630 | {
|
|---|
| 631 | any_remote |= c->remote;
|
|---|
| 632 | any_local |= ! c->remote;
|
|---|
| 633 | DB (DB_JOBS, (_("Live child %p (%s) PID %s %s\n"),
|
|---|
| 634 | c, c->file->name, pid2str (c->pid),
|
|---|
| 635 | c->remote ? _(" (remote)") : ""));
|
|---|
| 636 | #ifdef VMS
|
|---|
| 637 | break;
|
|---|
| 638 | #endif
|
|---|
| 639 | }
|
|---|
| 640 |
|
|---|
| 641 | /* First, check for remote children. */
|
|---|
| 642 | if (any_remote)
|
|---|
| 643 | pid = remote_status (&exit_code, &exit_sig, &coredump, 0);
|
|---|
| 644 | else
|
|---|
| 645 | pid = 0;
|
|---|
| 646 |
|
|---|
| 647 | if (pid > 0)
|
|---|
| 648 | /* We got a remote child. */
|
|---|
| 649 | remote = 1;
|
|---|
| 650 | else if (pid < 0)
|
|---|
| 651 | {
|
|---|
| 652 | /* A remote status command failed miserably. Punt. */
|
|---|
| 653 | remote_status_lose:
|
|---|
| 654 | pfatal_with_name ("remote_status");
|
|---|
| 655 | }
|
|---|
| 656 | else
|
|---|
| 657 | {
|
|---|
| 658 | /* No remote children. Check for local children. */
|
|---|
| 659 | #if !defined(__MSDOS__) && !defined(_AMIGA) && !defined(WINDOWS32)
|
|---|
| 660 | if (any_local)
|
|---|
| 661 | {
|
|---|
| 662 | #ifdef VMS
|
|---|
| 663 | /* Todo: This needs more untangling multi-process support */
|
|---|
| 664 | /* Just do single child process support now */
|
|---|
| 665 | vmsWaitForChildren (&status);
|
|---|
| 666 | pid = c->pid;
|
|---|
| 667 |
|
|---|
| 668 | /* VMS failure status can not be fully translated */
|
|---|
| 669 | status = $VMS_STATUS_SUCCESS (c->cstatus) ? 0 : (1 << 8);
|
|---|
| 670 |
|
|---|
| 671 | /* A Posix failure can be exactly translated */
|
|---|
| 672 | if ((c->cstatus & VMS_POSIX_EXIT_MASK) == VMS_POSIX_EXIT_MASK)
|
|---|
| 673 | status = (c->cstatus >> 3 & 255) << 8;
|
|---|
| 674 | #else
|
|---|
| 675 | #ifdef WAIT_NOHANG
|
|---|
| 676 | if (!block)
|
|---|
| 677 | pid = WAIT_NOHANG (&status);
|
|---|
| 678 | else
|
|---|
| 679 | #endif
|
|---|
| 680 | EINTRLOOP (pid, wait (&status));
|
|---|
| 681 | #endif /* !VMS */
|
|---|
| 682 | }
|
|---|
| 683 | else
|
|---|
| 684 | pid = 0;
|
|---|
| 685 |
|
|---|
| 686 | if (pid < 0)
|
|---|
| 687 | {
|
|---|
| 688 | /* The wait*() failed miserably. Punt. */
|
|---|
| 689 | pfatal_with_name ("wait");
|
|---|
| 690 | }
|
|---|
| 691 | else if (pid > 0)
|
|---|
| 692 | {
|
|---|
| 693 | /* We got a child exit; chop the status word up. */
|
|---|
| 694 | exit_code = WEXITSTATUS (status);
|
|---|
| 695 | exit_sig = WIFSIGNALED (status) ? WTERMSIG (status) : 0;
|
|---|
| 696 | coredump = WCOREDUMP (status);
|
|---|
| 697 |
|
|---|
| 698 | /* If we have started jobs in this second, remove one. */
|
|---|
| 699 | if (job_counter)
|
|---|
| 700 | --job_counter;
|
|---|
| 701 | }
|
|---|
| 702 | else
|
|---|
| 703 | {
|
|---|
| 704 | /* No local children are dead. */
|
|---|
| 705 | reap_more = 0;
|
|---|
| 706 |
|
|---|
| 707 | if (!block || !any_remote)
|
|---|
| 708 | break;
|
|---|
| 709 |
|
|---|
| 710 | /* Now try a blocking wait for a remote child. */
|
|---|
| 711 | pid = remote_status (&exit_code, &exit_sig, &coredump, 1);
|
|---|
| 712 | if (pid < 0)
|
|---|
| 713 | goto remote_status_lose;
|
|---|
| 714 | else if (pid == 0)
|
|---|
| 715 | /* No remote children either. Finally give up. */
|
|---|
| 716 | break;
|
|---|
| 717 |
|
|---|
| 718 | /* We got a remote child. */
|
|---|
| 719 | remote = 1;
|
|---|
| 720 | }
|
|---|
| 721 | #endif /* !__MSDOS__, !Amiga, !WINDOWS32. */
|
|---|
| 722 |
|
|---|
| 723 | #ifdef __MSDOS__
|
|---|
| 724 | /* Life is very different on MSDOS. */
|
|---|
| 725 | pid = dos_pid - 1;
|
|---|
| 726 | status = dos_status;
|
|---|
| 727 | exit_code = WEXITSTATUS (status);
|
|---|
| 728 | if (exit_code == 0xff)
|
|---|
| 729 | exit_code = -1;
|
|---|
| 730 | exit_sig = WIFSIGNALED (status) ? WTERMSIG (status) : 0;
|
|---|
| 731 | coredump = 0;
|
|---|
| 732 | #endif /* __MSDOS__ */
|
|---|
| 733 | #ifdef _AMIGA
|
|---|
| 734 | /* Same on Amiga */
|
|---|
| 735 | pid = amiga_pid - 1;
|
|---|
| 736 | status = amiga_status;
|
|---|
| 737 | exit_code = amiga_status;
|
|---|
| 738 | exit_sig = 0;
|
|---|
| 739 | coredump = 0;
|
|---|
| 740 | #endif /* _AMIGA */
|
|---|
| 741 | #ifdef WINDOWS32
|
|---|
| 742 | {
|
|---|
| 743 | HANDLE hPID;
|
|---|
| 744 | HANDLE hcTID, hcPID;
|
|---|
| 745 | DWORD dwWaitStatus = 0;
|
|---|
| 746 | exit_code = 0;
|
|---|
| 747 | exit_sig = 0;
|
|---|
| 748 | coredump = 0;
|
|---|
| 749 |
|
|---|
| 750 | /* Record the thread ID of the main process, so that we
|
|---|
| 751 | could suspend it in the signal handler. */
|
|---|
| 752 | if (!main_thread)
|
|---|
| 753 | {
|
|---|
| 754 | hcTID = GetCurrentThread ();
|
|---|
| 755 | hcPID = GetCurrentProcess ();
|
|---|
| 756 | if (!DuplicateHandle (hcPID, hcTID, hcPID, &main_thread, 0,
|
|---|
| 757 | FALSE, DUPLICATE_SAME_ACCESS))
|
|---|
| 758 | {
|
|---|
| 759 | DWORD e = GetLastError ();
|
|---|
| 760 | fprintf (stderr,
|
|---|
| 761 | "Determine main thread ID (Error %ld: %s)\n",
|
|---|
| 762 | e, map_windows32_error_to_string (e));
|
|---|
| 763 | }
|
|---|
| 764 | else
|
|---|
| 765 | DB (DB_VERBOSE, ("Main thread handle = %p\n", main_thread));
|
|---|
| 766 | }
|
|---|
| 767 |
|
|---|
| 768 | /* wait for anything to finish */
|
|---|
| 769 | hPID = process_wait_for_any (block, &dwWaitStatus);
|
|---|
| 770 | if (hPID)
|
|---|
| 771 | {
|
|---|
| 772 | /* was an error found on this process? */
|
|---|
| 773 | int werr = process_last_err (hPID);
|
|---|
| 774 |
|
|---|
| 775 | /* get exit data */
|
|---|
| 776 | exit_code = process_exit_code (hPID);
|
|---|
| 777 |
|
|---|
| 778 | if (werr)
|
|---|
| 779 | fprintf (stderr, "make (e=%d): %s", exit_code,
|
|---|
| 780 | map_windows32_error_to_string (exit_code));
|
|---|
| 781 |
|
|---|
| 782 | /* signal */
|
|---|
| 783 | exit_sig = process_signal (hPID);
|
|---|
| 784 |
|
|---|
| 785 | /* cleanup process */
|
|---|
| 786 | process_cleanup (hPID);
|
|---|
| 787 |
|
|---|
| 788 | coredump = 0;
|
|---|
| 789 | }
|
|---|
| 790 | else if (dwWaitStatus == WAIT_FAILED)
|
|---|
| 791 | {
|
|---|
| 792 | /* The WaitForMultipleObjects() failed miserably. Punt. */
|
|---|
| 793 | pfatal_with_name ("WaitForMultipleObjects");
|
|---|
| 794 | }
|
|---|
| 795 | else if (dwWaitStatus == WAIT_TIMEOUT)
|
|---|
| 796 | {
|
|---|
| 797 | /* No child processes are finished. Give up waiting. */
|
|---|
| 798 | reap_more = 0;
|
|---|
| 799 | break;
|
|---|
| 800 | }
|
|---|
| 801 |
|
|---|
| 802 | pid = (pid_t) hPID;
|
|---|
| 803 | }
|
|---|
| 804 | #endif /* WINDOWS32 */
|
|---|
| 805 | }
|
|---|
| 806 |
|
|---|
| 807 | /* Check if this is the child of the 'shell' function. */
|
|---|
| 808 | if (!remote && pid == shell_function_pid)
|
|---|
| 809 | {
|
|---|
| 810 | shell_completed (exit_code, exit_sig);
|
|---|
| 811 | break;
|
|---|
| 812 | }
|
|---|
| 813 |
|
|---|
| 814 | /* Search for a child matching the deceased one. */
|
|---|
| 815 | lastc = 0;
|
|---|
| 816 | for (c = children; c != 0; lastc = c, c = c->next)
|
|---|
| 817 | if (c->pid == pid && c->remote == remote)
|
|---|
| 818 | break;
|
|---|
| 819 |
|
|---|
| 820 | if (c == 0)
|
|---|
| 821 | /* An unknown child died.
|
|---|
| 822 | Ignore it; it was inherited from our invoker. */
|
|---|
| 823 | continue;
|
|---|
| 824 |
|
|---|
| 825 | /* Determine the failure status: 0 for success, 1 for updating target in
|
|---|
| 826 | question mode, 2 for anything else. */
|
|---|
| 827 | if (exit_sig == 0 && exit_code == 0)
|
|---|
| 828 | child_failed = MAKE_SUCCESS;
|
|---|
| 829 | else if (exit_sig == 0 && exit_code == 1 && question_flag && c->recursive)
|
|---|
| 830 | child_failed = MAKE_TROUBLE;
|
|---|
| 831 | else
|
|---|
| 832 | child_failed = MAKE_FAILURE;
|
|---|
| 833 |
|
|---|
| 834 | DB (DB_JOBS, (child_failed
|
|---|
| 835 | ? _("Reaping losing child %p PID %s %s\n")
|
|---|
| 836 | : _("Reaping winning child %p PID %s %s\n"),
|
|---|
| 837 | c, pid2str (c->pid), c->remote ? _(" (remote)") : ""));
|
|---|
| 838 |
|
|---|
| 839 | if (c->sh_batch_file)
|
|---|
| 840 | {
|
|---|
| 841 | int rm_status;
|
|---|
| 842 |
|
|---|
| 843 | DB (DB_JOBS, (_("Cleaning up temp batch file %s\n"),
|
|---|
| 844 | c->sh_batch_file));
|
|---|
| 845 |
|
|---|
| 846 | errno = 0;
|
|---|
| 847 | rm_status = remove (c->sh_batch_file);
|
|---|
| 848 | if (rm_status)
|
|---|
| 849 | DB (DB_JOBS, (_("Cleaning up temp batch file %s failed (%d)\n"),
|
|---|
| 850 | c->sh_batch_file, errno));
|
|---|
| 851 |
|
|---|
| 852 | /* all done with memory */
|
|---|
| 853 | free (c->sh_batch_file);
|
|---|
| 854 | c->sh_batch_file = NULL;
|
|---|
| 855 | }
|
|---|
| 856 |
|
|---|
| 857 | /* If this child had the good stdin, say it is now free. */
|
|---|
| 858 | if (c->good_stdin)
|
|---|
| 859 | good_stdin_used = 0;
|
|---|
| 860 |
|
|---|
| 861 | dontcare = c->dontcare;
|
|---|
| 862 |
|
|---|
| 863 | if (child_failed && !c->noerror && !ignore_errors_flag)
|
|---|
| 864 | {
|
|---|
| 865 | /* The commands failed. Write an error message,
|
|---|
| 866 | delete non-precious targets, and abort. */
|
|---|
| 867 | static int delete_on_error = -1;
|
|---|
| 868 |
|
|---|
| 869 | if (!dontcare && child_failed == MAKE_FAILURE)
|
|---|
| 870 | child_error (c, exit_code, exit_sig, coredump, 0);
|
|---|
| 871 |
|
|---|
| 872 | c->file->update_status = child_failed == MAKE_FAILURE ? us_failed : us_question;
|
|---|
| 873 | if (delete_on_error == -1)
|
|---|
| 874 | {
|
|---|
| 875 | struct file *f = lookup_file (".DELETE_ON_ERROR");
|
|---|
| 876 | delete_on_error = f != 0 && f->is_target;
|
|---|
| 877 | }
|
|---|
| 878 | if (exit_sig != 0 || delete_on_error)
|
|---|
| 879 | delete_child_targets (c);
|
|---|
| 880 | }
|
|---|
| 881 | else
|
|---|
| 882 | {
|
|---|
| 883 | if (child_failed)
|
|---|
| 884 | {
|
|---|
| 885 | /* The commands failed, but we don't care. */
|
|---|
| 886 | child_error (c, exit_code, exit_sig, coredump, 1);
|
|---|
| 887 | child_failed = 0;
|
|---|
| 888 | }
|
|---|
| 889 |
|
|---|
| 890 | /* If there are more commands to run, try to start them. */
|
|---|
| 891 | if (job_next_command (c))
|
|---|
| 892 | {
|
|---|
| 893 | if (handling_fatal_signal)
|
|---|
| 894 | {
|
|---|
| 895 | /* Never start new commands while we are dying.
|
|---|
| 896 | Since there are more commands that wanted to be run,
|
|---|
| 897 | the target was not completely remade. So we treat
|
|---|
| 898 | this as if a command had failed. */
|
|---|
| 899 | c->file->update_status = us_failed;
|
|---|
| 900 | }
|
|---|
| 901 | else
|
|---|
| 902 | {
|
|---|
| 903 | #ifndef NO_OUTPUT_SYNC
|
|---|
| 904 | /* If we're sync'ing per line, write the previous line's
|
|---|
| 905 | output before starting the next one. */
|
|---|
| 906 | if (output_sync == OUTPUT_SYNC_LINE)
|
|---|
| 907 | output_dump (&c->output);
|
|---|
| 908 | #endif
|
|---|
| 909 | /* Check again whether to start remotely.
|
|---|
| 910 | Whether or not we want to changes over time.
|
|---|
| 911 | Also, start_remote_job may need state set up
|
|---|
| 912 | by start_remote_job_p. */
|
|---|
| 913 | c->remote = start_remote_job_p (0);
|
|---|
| 914 | start_job_command (c);
|
|---|
| 915 | /* Fatal signals are left blocked in case we were
|
|---|
| 916 | about to put that child on the chain. But it is
|
|---|
| 917 | already there, so it is safe for a fatal signal to
|
|---|
| 918 | arrive now; it will clean up this child's targets. */
|
|---|
| 919 | unblock_sigs ();
|
|---|
| 920 | if (c->file->command_state == cs_running)
|
|---|
| 921 | /* We successfully started the new command.
|
|---|
| 922 | Loop to reap more children. */
|
|---|
| 923 | continue;
|
|---|
| 924 | }
|
|---|
| 925 |
|
|---|
| 926 | if (c->file->update_status != us_success)
|
|---|
| 927 | /* We failed to start the commands. */
|
|---|
| 928 | delete_child_targets (c);
|
|---|
| 929 | }
|
|---|
| 930 | else
|
|---|
| 931 | /* There are no more commands. We got through them all
|
|---|
| 932 | without an unignored error. Now the target has been
|
|---|
| 933 | successfully updated. */
|
|---|
| 934 | c->file->update_status = us_success;
|
|---|
| 935 | }
|
|---|
| 936 |
|
|---|
| 937 | /* When we get here, all the commands for c->file are finished. */
|
|---|
| 938 |
|
|---|
| 939 | #ifndef NO_OUTPUT_SYNC
|
|---|
| 940 | /* Synchronize any remaining parallel output. */
|
|---|
| 941 | output_dump (&c->output);
|
|---|
| 942 | #endif
|
|---|
| 943 |
|
|---|
| 944 | /* At this point c->file->update_status is success or failed. But
|
|---|
| 945 | c->file->command_state is still cs_running if all the commands
|
|---|
| 946 | ran; notice_finish_file looks for cs_running to tell it that
|
|---|
| 947 | it's interesting to check the file's modtime again now. */
|
|---|
| 948 |
|
|---|
| 949 | if (! handling_fatal_signal)
|
|---|
| 950 | /* Notice if the target of the commands has been changed.
|
|---|
| 951 | This also propagates its values for command_state and
|
|---|
| 952 | update_status to its also_make files. */
|
|---|
| 953 | notice_finished_file (c->file);
|
|---|
| 954 |
|
|---|
| 955 | DB (DB_JOBS, (_("Removing child %p PID %s%s from chain.\n"),
|
|---|
| 956 | c, pid2str (c->pid), c->remote ? _(" (remote)") : ""));
|
|---|
| 957 |
|
|---|
| 958 | /* Block fatal signals while frobnicating the list, so that
|
|---|
| 959 | children and job_slots_used are always consistent. Otherwise
|
|---|
| 960 | a fatal signal arriving after the child is off the chain and
|
|---|
| 961 | before job_slots_used is decremented would believe a child was
|
|---|
| 962 | live and call reap_children again. */
|
|---|
| 963 | block_sigs ();
|
|---|
| 964 |
|
|---|
| 965 | /* There is now another slot open. */
|
|---|
| 966 | if (job_slots_used > 0)
|
|---|
| 967 | --job_slots_used;
|
|---|
| 968 |
|
|---|
| 969 | /* Remove the child from the chain and free it. */
|
|---|
| 970 | if (lastc == 0)
|
|---|
| 971 | children = c->next;
|
|---|
| 972 | else
|
|---|
| 973 | lastc->next = c->next;
|
|---|
| 974 |
|
|---|
| 975 | free_child (c);
|
|---|
| 976 |
|
|---|
| 977 | unblock_sigs ();
|
|---|
| 978 |
|
|---|
| 979 | /* If the job failed, and the -k flag was not given, die,
|
|---|
| 980 | unless we are already in the process of dying. */
|
|---|
| 981 | if (!err && child_failed && !dontcare && !keep_going_flag &&
|
|---|
| 982 | /* fatal_error_signal will die with the right signal. */
|
|---|
| 983 | !handling_fatal_signal)
|
|---|
| 984 | die (child_failed);
|
|---|
| 985 |
|
|---|
| 986 | /* Only block for one child. */
|
|---|
| 987 | block = 0;
|
|---|
| 988 | }
|
|---|
| 989 |
|
|---|
| 990 | return;
|
|---|
| 991 | }
|
|---|
| 992 | |
|---|
| 993 |
|
|---|
| 994 | /* Free the storage allocated for CHILD. */
|
|---|
| 995 |
|
|---|
| 996 | static void
|
|---|
| 997 | free_child (struct child *child)
|
|---|
| 998 | {
|
|---|
| 999 | output_close (&child->output);
|
|---|
| 1000 |
|
|---|
| 1001 | if (!jobserver_tokens)
|
|---|
| 1002 | ONS (fatal, NILF, "INTERNAL: Freeing child %p (%s) but no tokens left!\n",
|
|---|
| 1003 | child, child->file->name);
|
|---|
| 1004 |
|
|---|
| 1005 | /* If we're using the jobserver and this child is not the only outstanding
|
|---|
| 1006 | job, put a token back into the pipe for it. */
|
|---|
| 1007 |
|
|---|
| 1008 | if (jobserver_enabled () && jobserver_tokens > 1)
|
|---|
| 1009 | {
|
|---|
| 1010 | jobserver_release (1);
|
|---|
| 1011 | DB (DB_JOBS, (_("Released token for child %p (%s).\n"),
|
|---|
| 1012 | child, child->file->name));
|
|---|
| 1013 | }
|
|---|
| 1014 |
|
|---|
| 1015 | --jobserver_tokens;
|
|---|
| 1016 |
|
|---|
| 1017 | if (handling_fatal_signal) /* Don't bother free'ing if about to die. */
|
|---|
| 1018 | return;
|
|---|
| 1019 |
|
|---|
| 1020 | if (child->command_lines != 0)
|
|---|
| 1021 | {
|
|---|
| 1022 | register unsigned int i;
|
|---|
| 1023 | for (i = 0; i < child->file->cmds->ncommand_lines; ++i)
|
|---|
| 1024 | free (child->command_lines[i]);
|
|---|
| 1025 | free (child->command_lines);
|
|---|
| 1026 | }
|
|---|
| 1027 |
|
|---|
| 1028 | if (child->environment != 0)
|
|---|
| 1029 | {
|
|---|
| 1030 | register char **ep = child->environment;
|
|---|
| 1031 | while (*ep != 0)
|
|---|
| 1032 | free (*ep++);
|
|---|
| 1033 | free (child->environment);
|
|---|
| 1034 | }
|
|---|
| 1035 |
|
|---|
| 1036 | free (child);
|
|---|
| 1037 | }
|
|---|
| 1038 | |
|---|
| 1039 |
|
|---|
| 1040 | #ifdef POSIX
|
|---|
| 1041 | extern sigset_t fatal_signal_set;
|
|---|
| 1042 | #endif
|
|---|
| 1043 |
|
|---|
| 1044 | void
|
|---|
| 1045 | block_sigs (void)
|
|---|
| 1046 | {
|
|---|
| 1047 | #ifdef POSIX
|
|---|
| 1048 | (void) sigprocmask (SIG_BLOCK, &fatal_signal_set, (sigset_t *) 0);
|
|---|
| 1049 | #else
|
|---|
| 1050 | # ifdef HAVE_SIGSETMASK
|
|---|
| 1051 | (void) sigblock (fatal_signal_mask);
|
|---|
| 1052 | # endif
|
|---|
| 1053 | #endif
|
|---|
| 1054 | }
|
|---|
| 1055 |
|
|---|
| 1056 | #ifdef POSIX
|
|---|
| 1057 | void
|
|---|
| 1058 | unblock_sigs (void)
|
|---|
| 1059 | {
|
|---|
| 1060 | sigset_t empty;
|
|---|
| 1061 | sigemptyset (&empty);
|
|---|
| 1062 | sigprocmask (SIG_SETMASK, &empty, (sigset_t *) 0);
|
|---|
| 1063 | }
|
|---|
| 1064 | #endif
|
|---|
| 1065 |
|
|---|
| 1066 |
|
|---|
| 1067 | /* Start a job to run the commands specified in CHILD.
|
|---|
| 1068 | CHILD is updated to reflect the commands and ID of the child process.
|
|---|
| 1069 |
|
|---|
| 1070 | NOTE: On return fatal signals are blocked! The caller is responsible
|
|---|
| 1071 | for calling 'unblock_sigs', once the new child is safely on the chain so
|
|---|
| 1072 | it can be cleaned up in the event of a fatal signal. */
|
|---|
| 1073 |
|
|---|
| 1074 | static void
|
|---|
| 1075 | start_job_command (struct child *child)
|
|---|
| 1076 | {
|
|---|
| 1077 | int flags;
|
|---|
| 1078 | char *p;
|
|---|
| 1079 | #ifdef VMS
|
|---|
| 1080 | char *argv;
|
|---|
| 1081 | #else
|
|---|
| 1082 | char **argv;
|
|---|
| 1083 | #endif
|
|---|
| 1084 |
|
|---|
| 1085 | /* If we have a completely empty commandset, stop now. */
|
|---|
| 1086 | if (!child->command_ptr)
|
|---|
| 1087 | goto next_command;
|
|---|
| 1088 |
|
|---|
| 1089 | /* Combine the flags parsed for the line itself with
|
|---|
| 1090 | the flags specified globally for this target. */
|
|---|
| 1091 | flags = (child->file->command_flags
|
|---|
| 1092 | | child->file->cmds->lines_flags[child->command_line - 1]);
|
|---|
| 1093 |
|
|---|
| 1094 | p = child->command_ptr;
|
|---|
| 1095 | child->noerror = ((flags & COMMANDS_NOERROR) != 0);
|
|---|
| 1096 |
|
|---|
| 1097 | while (*p != '\0')
|
|---|
| 1098 | {
|
|---|
| 1099 | if (*p == '@')
|
|---|
| 1100 | flags |= COMMANDS_SILENT;
|
|---|
| 1101 | else if (*p == '+')
|
|---|
| 1102 | flags |= COMMANDS_RECURSE;
|
|---|
| 1103 | else if (*p == '-')
|
|---|
| 1104 | child->noerror = 1;
|
|---|
| 1105 | /* Don't skip newlines. */
|
|---|
| 1106 | else if (!ISBLANK (*p))
|
|---|
| 1107 | break;
|
|---|
| 1108 | ++p;
|
|---|
| 1109 | }
|
|---|
| 1110 |
|
|---|
| 1111 | child->recursive = ((flags & COMMANDS_RECURSE) != 0);
|
|---|
| 1112 |
|
|---|
| 1113 | /* Update the file's command flags with any new ones we found. We only
|
|---|
| 1114 | keep the COMMANDS_RECURSE setting. Even this isn't 100% correct; we are
|
|---|
| 1115 | now marking more commands recursive than should be in the case of
|
|---|
| 1116 | multiline define/endef scripts where only one line is marked "+". In
|
|---|
| 1117 | order to really fix this, we'll have to keep a lines_flags for every
|
|---|
| 1118 | actual line, after expansion. */
|
|---|
| 1119 | child->file->cmds->lines_flags[child->command_line - 1] |= flags & COMMANDS_RECURSE;
|
|---|
| 1120 |
|
|---|
| 1121 | /* POSIX requires that a recipe prefix after a backslash-newline should
|
|---|
| 1122 | be ignored. Remove it now so the output is correct. */
|
|---|
| 1123 | {
|
|---|
| 1124 | char prefix = child->file->cmds->recipe_prefix;
|
|---|
| 1125 | char *p1, *p2;
|
|---|
| 1126 | p1 = p2 = p;
|
|---|
| 1127 | while (*p1 != '\0')
|
|---|
| 1128 | {
|
|---|
| 1129 | *(p2++) = *p1;
|
|---|
| 1130 | if (p1[0] == '\n' && p1[1] == prefix)
|
|---|
| 1131 | ++p1;
|
|---|
| 1132 | ++p1;
|
|---|
| 1133 | }
|
|---|
| 1134 | *p2 = *p1;
|
|---|
| 1135 | }
|
|---|
| 1136 |
|
|---|
| 1137 | /* Figure out an argument list from this command line. */
|
|---|
| 1138 | {
|
|---|
| 1139 | char *end = 0;
|
|---|
| 1140 | #ifdef VMS
|
|---|
| 1141 | /* Skip any leading whitespace */
|
|---|
| 1142 | while (*p)
|
|---|
| 1143 | {
|
|---|
| 1144 | if (!ISSPACE (*p))
|
|---|
| 1145 | {
|
|---|
| 1146 | if (*p != '\\')
|
|---|
| 1147 | break;
|
|---|
| 1148 | if ((p[1] != '\n') && (p[1] != 'n') && (p[1] != 't'))
|
|---|
| 1149 | break;
|
|---|
| 1150 | }
|
|---|
| 1151 | p++;
|
|---|
| 1152 | }
|
|---|
| 1153 |
|
|---|
| 1154 | argv = p;
|
|---|
| 1155 | /* Although construct_command_argv contains some code for VMS, it was/is
|
|---|
| 1156 | not called/used. Please note, for VMS argv is a string (not an array
|
|---|
| 1157 | of strings) which contains the complete command line, which for
|
|---|
| 1158 | multi-line variables still includes the newlines. So detect newlines
|
|---|
| 1159 | and set 'end' (which is used for child->command_ptr) instead of
|
|---|
| 1160 | (re-)writing construct_command_argv */
|
|---|
| 1161 | if (!one_shell)
|
|---|
| 1162 | {
|
|---|
| 1163 | char *s = p;
|
|---|
| 1164 | int instring = 0;
|
|---|
| 1165 | while (*s)
|
|---|
| 1166 | {
|
|---|
| 1167 | if (*s == '"')
|
|---|
| 1168 | instring = !instring;
|
|---|
| 1169 | else if (*s == '\\' && !instring && *(s+1) != 0)
|
|---|
| 1170 | s++;
|
|---|
| 1171 | else if (*s == '\n' && !instring)
|
|---|
| 1172 | {
|
|---|
| 1173 | end = s;
|
|---|
| 1174 | break;
|
|---|
| 1175 | }
|
|---|
| 1176 | ++s;
|
|---|
| 1177 | }
|
|---|
| 1178 | }
|
|---|
| 1179 | #else
|
|---|
| 1180 | argv = construct_command_argv (p, &end, child->file,
|
|---|
| 1181 | child->file->cmds->lines_flags[child->command_line - 1],
|
|---|
| 1182 | &child->sh_batch_file);
|
|---|
| 1183 | #endif
|
|---|
| 1184 | if (end == NULL)
|
|---|
| 1185 | child->command_ptr = NULL;
|
|---|
| 1186 | else
|
|---|
| 1187 | {
|
|---|
| 1188 | *end++ = '\0';
|
|---|
| 1189 | child->command_ptr = end;
|
|---|
| 1190 | }
|
|---|
| 1191 | }
|
|---|
| 1192 |
|
|---|
| 1193 | /* If -q was given, say that updating 'failed' if there was any text on the
|
|---|
| 1194 | command line, or 'succeeded' otherwise. The exit status of 1 tells the
|
|---|
| 1195 | user that -q is saying 'something to do'; the exit status for a random
|
|---|
| 1196 | error is 2. */
|
|---|
| 1197 | if (argv != 0 && question_flag && !(flags & COMMANDS_RECURSE))
|
|---|
| 1198 | {
|
|---|
| 1199 | #ifndef VMS
|
|---|
| 1200 | free (argv[0]);
|
|---|
| 1201 | free (argv);
|
|---|
| 1202 | #endif
|
|---|
| 1203 | #ifdef VMS
|
|---|
| 1204 | /* On VMS, argv[0] can be a null string here */
|
|---|
| 1205 | if (argv[0] != 0)
|
|---|
| 1206 | {
|
|---|
| 1207 | #endif
|
|---|
| 1208 | child->file->update_status = us_question;
|
|---|
| 1209 | notice_finished_file (child->file);
|
|---|
| 1210 | return;
|
|---|
| 1211 | #ifdef VMS
|
|---|
| 1212 | }
|
|---|
| 1213 | #endif
|
|---|
| 1214 | }
|
|---|
| 1215 |
|
|---|
| 1216 | if (touch_flag && !(flags & COMMANDS_RECURSE))
|
|---|
| 1217 | {
|
|---|
| 1218 | /* Go on to the next command. It might be the recursive one.
|
|---|
| 1219 | We construct ARGV only to find the end of the command line. */
|
|---|
| 1220 | #ifndef VMS
|
|---|
| 1221 | if (argv)
|
|---|
| 1222 | {
|
|---|
| 1223 | free (argv[0]);
|
|---|
| 1224 | free (argv);
|
|---|
| 1225 | }
|
|---|
| 1226 | #endif
|
|---|
| 1227 | argv = 0;
|
|---|
| 1228 | }
|
|---|
| 1229 |
|
|---|
| 1230 | if (argv == 0)
|
|---|
| 1231 | {
|
|---|
| 1232 | next_command:
|
|---|
| 1233 | #ifdef __MSDOS__
|
|---|
| 1234 | execute_by_shell = 0; /* in case construct_command_argv sets it */
|
|---|
| 1235 | #endif
|
|---|
| 1236 | /* This line has no commands. Go to the next. */
|
|---|
| 1237 | if (job_next_command (child))
|
|---|
| 1238 | start_job_command (child);
|
|---|
| 1239 | else
|
|---|
| 1240 | {
|
|---|
| 1241 | /* No more commands. Make sure we're "running"; we might not be if
|
|---|
| 1242 | (e.g.) all commands were skipped due to -n. */
|
|---|
| 1243 | set_command_state (child->file, cs_running);
|
|---|
| 1244 | child->file->update_status = us_success;
|
|---|
| 1245 | notice_finished_file (child->file);
|
|---|
| 1246 | }
|
|---|
| 1247 |
|
|---|
| 1248 | OUTPUT_UNSET();
|
|---|
| 1249 | return;
|
|---|
| 1250 | }
|
|---|
| 1251 |
|
|---|
| 1252 | /* Are we going to synchronize this command's output? Do so if either we're
|
|---|
| 1253 | in SYNC_RECURSE mode or this command is not recursive. We'll also check
|
|---|
| 1254 | output_sync separately below in case it changes due to error. */
|
|---|
| 1255 | child->output.syncout = output_sync && (output_sync == OUTPUT_SYNC_RECURSE
|
|---|
| 1256 | || !(flags & COMMANDS_RECURSE));
|
|---|
| 1257 |
|
|---|
| 1258 | OUTPUT_SET (&child->output);
|
|---|
| 1259 |
|
|---|
| 1260 | #ifndef NO_OUTPUT_SYNC
|
|---|
| 1261 | if (! child->output.syncout)
|
|---|
| 1262 | /* We don't want to sync this command: to avoid misordered
|
|---|
| 1263 | output ensure any already-synced content is written. */
|
|---|
| 1264 | output_dump (&child->output);
|
|---|
| 1265 | #endif
|
|---|
| 1266 |
|
|---|
| 1267 | /* Print the command if appropriate. */
|
|---|
| 1268 | if (just_print_flag || trace_flag
|
|---|
| 1269 | || (!(flags & COMMANDS_SILENT) && !silent_flag))
|
|---|
| 1270 | OS (message, 0, "%s", p);
|
|---|
| 1271 |
|
|---|
| 1272 | /* Tell update_goal_chain that a command has been started on behalf of
|
|---|
| 1273 | this target. It is important that this happens here and not in
|
|---|
| 1274 | reap_children (where we used to do it), because reap_children might be
|
|---|
| 1275 | reaping children from a different target. We want this increment to
|
|---|
| 1276 | guaranteedly indicate that a command was started for the dependency
|
|---|
| 1277 | chain (i.e., update_file recursion chain) we are processing. */
|
|---|
| 1278 |
|
|---|
| 1279 | ++commands_started;
|
|---|
| 1280 |
|
|---|
| 1281 | /* Optimize an empty command. People use this for timestamp rules,
|
|---|
| 1282 | so avoid forking a useless shell. Do this after we increment
|
|---|
| 1283 | commands_started so make still treats this special case as if it
|
|---|
| 1284 | performed some action (makes a difference as to what messages are
|
|---|
| 1285 | printed, etc. */
|
|---|
| 1286 |
|
|---|
| 1287 | #if !defined(VMS) && !defined(_AMIGA)
|
|---|
| 1288 | if (
|
|---|
| 1289 | #if defined __MSDOS__ || defined (__EMX__)
|
|---|
| 1290 | unixy_shell /* the test is complicated and we already did it */
|
|---|
| 1291 | #else
|
|---|
| 1292 | (argv[0] && is_bourne_compatible_shell (argv[0]))
|
|---|
| 1293 | #endif
|
|---|
| 1294 | && (argv[1] && argv[1][0] == '-'
|
|---|
| 1295 | &&
|
|---|
| 1296 | ((argv[1][1] == 'c' && argv[1][2] == '\0')
|
|---|
| 1297 | ||
|
|---|
| 1298 | (argv[1][1] == 'e' && argv[1][2] == 'c' && argv[1][3] == '\0')))
|
|---|
| 1299 | && (argv[2] && argv[2][0] == ':' && argv[2][1] == '\0')
|
|---|
| 1300 | && argv[3] == NULL)
|
|---|
| 1301 | {
|
|---|
| 1302 | free (argv[0]);
|
|---|
| 1303 | free (argv);
|
|---|
| 1304 | goto next_command;
|
|---|
| 1305 | }
|
|---|
| 1306 | #endif /* !VMS && !_AMIGA */
|
|---|
| 1307 |
|
|---|
| 1308 | /* If -n was given, recurse to get the next line in the sequence. */
|
|---|
| 1309 |
|
|---|
| 1310 | if (just_print_flag && !(flags & COMMANDS_RECURSE))
|
|---|
| 1311 | {
|
|---|
| 1312 | #ifndef VMS
|
|---|
| 1313 | free (argv[0]);
|
|---|
| 1314 | free (argv);
|
|---|
| 1315 | #endif
|
|---|
| 1316 | goto next_command;
|
|---|
| 1317 | }
|
|---|
| 1318 |
|
|---|
| 1319 | /* We're sure we're going to invoke a command: set up the output. */
|
|---|
| 1320 | output_start ();
|
|---|
| 1321 |
|
|---|
| 1322 | /* Flush the output streams so they won't have things written twice. */
|
|---|
| 1323 |
|
|---|
| 1324 | fflush (stdout);
|
|---|
| 1325 | fflush (stderr);
|
|---|
| 1326 |
|
|---|
| 1327 | /* Decide whether to give this child the 'good' standard input
|
|---|
| 1328 | (one that points to the terminal or whatever), or the 'bad' one
|
|---|
| 1329 | that points to the read side of a broken pipe. */
|
|---|
| 1330 |
|
|---|
| 1331 | child->good_stdin = !good_stdin_used;
|
|---|
| 1332 | if (child->good_stdin)
|
|---|
| 1333 | good_stdin_used = 1;
|
|---|
| 1334 |
|
|---|
| 1335 | child->deleted = 0;
|
|---|
| 1336 |
|
|---|
| 1337 | #ifndef _AMIGA
|
|---|
| 1338 | /* Set up the environment for the child. */
|
|---|
| 1339 | if (child->environment == 0)
|
|---|
| 1340 | child->environment = target_environment (child->file);
|
|---|
| 1341 | #endif
|
|---|
| 1342 |
|
|---|
| 1343 | #if !defined(__MSDOS__) && !defined(_AMIGA) && !defined(WINDOWS32)
|
|---|
| 1344 |
|
|---|
| 1345 | #ifndef VMS
|
|---|
| 1346 | /* start_waiting_job has set CHILD->remote if we can start a remote job. */
|
|---|
| 1347 | if (child->remote)
|
|---|
| 1348 | {
|
|---|
| 1349 | int is_remote, id, used_stdin;
|
|---|
| 1350 | if (start_remote_job (argv, child->environment,
|
|---|
| 1351 | child->good_stdin ? 0 : get_bad_stdin (),
|
|---|
| 1352 | &is_remote, &id, &used_stdin))
|
|---|
| 1353 | /* Don't give up; remote execution may fail for various reasons. If
|
|---|
| 1354 | so, simply run the job locally. */
|
|---|
| 1355 | goto run_local;
|
|---|
| 1356 | else
|
|---|
| 1357 | {
|
|---|
| 1358 | if (child->good_stdin && !used_stdin)
|
|---|
| 1359 | {
|
|---|
| 1360 | child->good_stdin = 0;
|
|---|
| 1361 | good_stdin_used = 0;
|
|---|
| 1362 | }
|
|---|
| 1363 | child->remote = is_remote;
|
|---|
| 1364 | child->pid = id;
|
|---|
| 1365 | }
|
|---|
| 1366 | }
|
|---|
| 1367 | else
|
|---|
| 1368 | #endif /* !VMS */
|
|---|
| 1369 | {
|
|---|
| 1370 | /* Fork the child process. */
|
|---|
| 1371 |
|
|---|
| 1372 | char **parent_environ;
|
|---|
| 1373 |
|
|---|
| 1374 | run_local:
|
|---|
| 1375 | block_sigs ();
|
|---|
| 1376 |
|
|---|
| 1377 | child->remote = 0;
|
|---|
| 1378 |
|
|---|
| 1379 | #ifdef VMS
|
|---|
| 1380 | if (!child_execute_job (child, argv))
|
|---|
| 1381 | {
|
|---|
| 1382 | /* Fork failed! */
|
|---|
| 1383 | perror_with_name ("fork", "");
|
|---|
| 1384 | goto error;
|
|---|
| 1385 | }
|
|---|
| 1386 |
|
|---|
| 1387 | #else
|
|---|
| 1388 |
|
|---|
| 1389 | parent_environ = environ;
|
|---|
| 1390 |
|
|---|
| 1391 | jobserver_pre_child (flags & COMMANDS_RECURSE);
|
|---|
| 1392 |
|
|---|
| 1393 | child->pid = child_execute_job (&child->output, child->good_stdin, argv, child->environment);
|
|---|
| 1394 |
|
|---|
| 1395 | environ = parent_environ; /* Restore value child may have clobbered. */
|
|---|
| 1396 | jobserver_post_child (flags & COMMANDS_RECURSE);
|
|---|
| 1397 |
|
|---|
| 1398 | if (child->pid < 0)
|
|---|
| 1399 | {
|
|---|
| 1400 | /* Fork failed! */
|
|---|
| 1401 | unblock_sigs ();
|
|---|
| 1402 | perror_with_name ("fork", "");
|
|---|
| 1403 | goto error;
|
|---|
| 1404 | }
|
|---|
| 1405 | #endif /* !VMS */
|
|---|
| 1406 | }
|
|---|
| 1407 |
|
|---|
| 1408 | #else /* __MSDOS__ or Amiga or WINDOWS32 */
|
|---|
| 1409 | #ifdef __MSDOS__
|
|---|
| 1410 | {
|
|---|
| 1411 | int proc_return;
|
|---|
| 1412 |
|
|---|
| 1413 | block_sigs ();
|
|---|
| 1414 | dos_status = 0;
|
|---|
| 1415 |
|
|---|
| 1416 | /* We call 'system' to do the job of the SHELL, since stock DOS
|
|---|
| 1417 | shell is too dumb. Our 'system' knows how to handle long
|
|---|
| 1418 | command lines even if pipes/redirection is needed; it will only
|
|---|
| 1419 | call COMMAND.COM when its internal commands are used. */
|
|---|
| 1420 | if (execute_by_shell)
|
|---|
| 1421 | {
|
|---|
| 1422 | char *cmdline = argv[0];
|
|---|
| 1423 | /* We don't have a way to pass environment to 'system',
|
|---|
| 1424 | so we need to save and restore ours, sigh... */
|
|---|
| 1425 | char **parent_environ = environ;
|
|---|
| 1426 |
|
|---|
| 1427 | environ = child->environment;
|
|---|
| 1428 |
|
|---|
| 1429 | /* If we have a *real* shell, tell 'system' to call
|
|---|
| 1430 | it to do everything for us. */
|
|---|
| 1431 | if (unixy_shell)
|
|---|
| 1432 | {
|
|---|
| 1433 | /* A *real* shell on MSDOS may not support long
|
|---|
| 1434 | command lines the DJGPP way, so we must use 'system'. */
|
|---|
| 1435 | cmdline = argv[2]; /* get past "shell -c" */
|
|---|
| 1436 | }
|
|---|
| 1437 |
|
|---|
| 1438 | dos_command_running = 1;
|
|---|
| 1439 | proc_return = system (cmdline);
|
|---|
| 1440 | environ = parent_environ;
|
|---|
| 1441 | execute_by_shell = 0; /* for the next time */
|
|---|
| 1442 | }
|
|---|
| 1443 | else
|
|---|
| 1444 | {
|
|---|
| 1445 | dos_command_running = 1;
|
|---|
| 1446 | proc_return = spawnvpe (P_WAIT, argv[0], argv, child->environment);
|
|---|
| 1447 | }
|
|---|
| 1448 |
|
|---|
| 1449 | /* Need to unblock signals before turning off
|
|---|
| 1450 | dos_command_running, so that child's signals
|
|---|
| 1451 | will be treated as such (see fatal_error_signal). */
|
|---|
| 1452 | unblock_sigs ();
|
|---|
| 1453 | dos_command_running = 0;
|
|---|
| 1454 |
|
|---|
| 1455 | /* If the child got a signal, dos_status has its
|
|---|
| 1456 | high 8 bits set, so be careful not to alter them. */
|
|---|
| 1457 | if (proc_return == -1)
|
|---|
| 1458 | dos_status |= 0xff;
|
|---|
| 1459 | else
|
|---|
| 1460 | dos_status |= (proc_return & 0xff);
|
|---|
| 1461 | ++dead_children;
|
|---|
| 1462 | child->pid = dos_pid++;
|
|---|
| 1463 | }
|
|---|
| 1464 | #endif /* __MSDOS__ */
|
|---|
| 1465 | #ifdef _AMIGA
|
|---|
| 1466 | amiga_status = MyExecute (argv);
|
|---|
| 1467 |
|
|---|
| 1468 | ++dead_children;
|
|---|
| 1469 | child->pid = amiga_pid++;
|
|---|
| 1470 | if (amiga_batch_file)
|
|---|
| 1471 | {
|
|---|
| 1472 | amiga_batch_file = 0;
|
|---|
| 1473 | DeleteFile (amiga_bname); /* Ignore errors. */
|
|---|
| 1474 | }
|
|---|
| 1475 | #endif /* Amiga */
|
|---|
| 1476 | #ifdef WINDOWS32
|
|---|
| 1477 | {
|
|---|
| 1478 | HANDLE hPID;
|
|---|
| 1479 | char* arg0;
|
|---|
| 1480 | int outfd = FD_STDOUT;
|
|---|
| 1481 | int errfd = FD_STDERR;
|
|---|
| 1482 |
|
|---|
| 1483 | /* make UNC paths safe for CreateProcess -- backslash format */
|
|---|
| 1484 | arg0 = argv[0];
|
|---|
| 1485 | if (arg0 && arg0[0] == '/' && arg0[1] == '/')
|
|---|
| 1486 | for ( ; arg0 && *arg0; arg0++)
|
|---|
| 1487 | if (*arg0 == '/')
|
|---|
| 1488 | *arg0 = '\\';
|
|---|
| 1489 |
|
|---|
| 1490 | /* make sure CreateProcess() has Path it needs */
|
|---|
| 1491 | sync_Path_environment ();
|
|---|
| 1492 |
|
|---|
| 1493 | #ifndef NO_OUTPUT_SYNC
|
|---|
| 1494 | /* Divert child output if output_sync in use. */
|
|---|
| 1495 | if (child->output.syncout)
|
|---|
| 1496 | {
|
|---|
| 1497 | if (child->output.out >= 0)
|
|---|
| 1498 | outfd = child->output.out;
|
|---|
| 1499 | if (child->output.err >= 0)
|
|---|
| 1500 | errfd = child->output.err;
|
|---|
| 1501 | }
|
|---|
| 1502 | #else
|
|---|
| 1503 | outfd = errfd = -1;
|
|---|
| 1504 | #endif
|
|---|
| 1505 | hPID = process_easy (argv, child->environment, outfd, errfd);
|
|---|
| 1506 |
|
|---|
| 1507 | if (hPID != INVALID_HANDLE_VALUE)
|
|---|
| 1508 | child->pid = (pid_t) hPID;
|
|---|
| 1509 | else
|
|---|
| 1510 | {
|
|---|
| 1511 | int i;
|
|---|
| 1512 | unblock_sigs ();
|
|---|
| 1513 | fprintf (stderr,
|
|---|
| 1514 | _("process_easy() failed to launch process (e=%ld)\n"),
|
|---|
| 1515 | process_last_err (hPID));
|
|---|
| 1516 | for (i = 0; argv[i]; i++)
|
|---|
| 1517 | fprintf (stderr, "%s ", argv[i]);
|
|---|
| 1518 | fprintf (stderr, _("\nCounted %d args in failed launch\n"), i);
|
|---|
| 1519 | goto error;
|
|---|
| 1520 | }
|
|---|
| 1521 | }
|
|---|
| 1522 | #endif /* WINDOWS32 */
|
|---|
| 1523 | #endif /* __MSDOS__ or Amiga or WINDOWS32 */
|
|---|
| 1524 |
|
|---|
| 1525 | /* Bump the number of jobs started in this second. */
|
|---|
| 1526 | ++job_counter;
|
|---|
| 1527 |
|
|---|
| 1528 | /* We are the parent side. Set the state to
|
|---|
| 1529 | say the commands are running and return. */
|
|---|
| 1530 |
|
|---|
| 1531 | set_command_state (child->file, cs_running);
|
|---|
| 1532 |
|
|---|
| 1533 | /* Free the storage used by the child's argument list. */
|
|---|
| 1534 | #ifndef VMS
|
|---|
| 1535 | free (argv[0]);
|
|---|
| 1536 | free (argv);
|
|---|
| 1537 | #endif
|
|---|
| 1538 |
|
|---|
| 1539 | OUTPUT_UNSET();
|
|---|
| 1540 | return;
|
|---|
| 1541 |
|
|---|
| 1542 | error:
|
|---|
| 1543 | child->file->update_status = us_failed;
|
|---|
| 1544 | notice_finished_file (child->file);
|
|---|
| 1545 | OUTPUT_UNSET();
|
|---|
| 1546 | }
|
|---|
| 1547 |
|
|---|
| 1548 | /* Try to start a child running.
|
|---|
| 1549 | Returns nonzero if the child was started (and maybe finished), or zero if
|
|---|
| 1550 | the load was too high and the child was put on the 'waiting_jobs' chain. */
|
|---|
| 1551 |
|
|---|
| 1552 | static int
|
|---|
| 1553 | start_waiting_job (struct child *c)
|
|---|
| 1554 | {
|
|---|
| 1555 | struct file *f = c->file;
|
|---|
| 1556 |
|
|---|
| 1557 | /* If we can start a job remotely, we always want to, and don't care about
|
|---|
| 1558 | the local load average. We record that the job should be started
|
|---|
| 1559 | remotely in C->remote for start_job_command to test. */
|
|---|
| 1560 |
|
|---|
| 1561 | c->remote = start_remote_job_p (1);
|
|---|
| 1562 |
|
|---|
| 1563 | /* If we are running at least one job already and the load average
|
|---|
| 1564 | is too high, make this one wait. */
|
|---|
| 1565 | if (!c->remote
|
|---|
| 1566 | && ((job_slots_used > 0 && load_too_high ())
|
|---|
| 1567 | #ifdef WINDOWS32
|
|---|
| 1568 | || (process_used_slots () >= MAXIMUM_WAIT_OBJECTS)
|
|---|
| 1569 | #endif
|
|---|
| 1570 | ))
|
|---|
| 1571 | {
|
|---|
| 1572 | /* Put this child on the chain of children waiting for the load average
|
|---|
| 1573 | to go down. */
|
|---|
| 1574 | set_command_state (f, cs_running);
|
|---|
| 1575 | c->next = waiting_jobs;
|
|---|
| 1576 | waiting_jobs = c;
|
|---|
| 1577 | return 0;
|
|---|
| 1578 | }
|
|---|
| 1579 |
|
|---|
| 1580 | /* Start the first command; reap_children will run later command lines. */
|
|---|
| 1581 | start_job_command (c);
|
|---|
| 1582 |
|
|---|
| 1583 | switch (f->command_state)
|
|---|
| 1584 | {
|
|---|
| 1585 | case cs_running:
|
|---|
| 1586 | c->next = children;
|
|---|
| 1587 | DB (DB_JOBS, (_("Putting child %p (%s) PID %s%s on the chain.\n"),
|
|---|
| 1588 | c, c->file->name, pid2str (c->pid),
|
|---|
| 1589 | c->remote ? _(" (remote)") : ""));
|
|---|
| 1590 | children = c;
|
|---|
| 1591 | /* One more job slot is in use. */
|
|---|
| 1592 | ++job_slots_used;
|
|---|
| 1593 | unblock_sigs ();
|
|---|
| 1594 | break;
|
|---|
| 1595 |
|
|---|
| 1596 | case cs_not_started:
|
|---|
| 1597 | /* All the command lines turned out to be empty. */
|
|---|
| 1598 | f->update_status = us_success;
|
|---|
| 1599 | /* FALLTHROUGH */
|
|---|
| 1600 |
|
|---|
| 1601 | case cs_finished:
|
|---|
| 1602 | notice_finished_file (f);
|
|---|
| 1603 | free_child (c);
|
|---|
| 1604 | break;
|
|---|
| 1605 |
|
|---|
| 1606 | default:
|
|---|
| 1607 | assert (f->command_state == cs_finished);
|
|---|
| 1608 | break;
|
|---|
| 1609 | }
|
|---|
| 1610 |
|
|---|
| 1611 | return 1;
|
|---|
| 1612 | }
|
|---|
| 1613 |
|
|---|
| 1614 | /* Create a 'struct child' for FILE and start its commands running. */
|
|---|
| 1615 |
|
|---|
| 1616 | void
|
|---|
| 1617 | new_job (struct file *file)
|
|---|
| 1618 | {
|
|---|
| 1619 | struct commands *cmds = file->cmds;
|
|---|
| 1620 | struct child *c;
|
|---|
| 1621 | char **lines;
|
|---|
| 1622 | unsigned int i;
|
|---|
| 1623 |
|
|---|
| 1624 | /* Let any previously decided-upon jobs that are waiting
|
|---|
| 1625 | for the load to go down start before this new one. */
|
|---|
| 1626 | start_waiting_jobs ();
|
|---|
| 1627 |
|
|---|
| 1628 | /* Reap any children that might have finished recently. */
|
|---|
| 1629 | reap_children (0, 0);
|
|---|
| 1630 |
|
|---|
| 1631 | /* Chop the commands up into lines if they aren't already. */
|
|---|
| 1632 | chop_commands (cmds);
|
|---|
| 1633 |
|
|---|
| 1634 | /* Start the command sequence, record it in a new
|
|---|
| 1635 | 'struct child', and add that to the chain. */
|
|---|
| 1636 |
|
|---|
| 1637 | c = xcalloc (sizeof (struct child));
|
|---|
| 1638 | output_init (&c->output);
|
|---|
| 1639 |
|
|---|
| 1640 | c->file = file;
|
|---|
| 1641 | c->sh_batch_file = NULL;
|
|---|
| 1642 |
|
|---|
| 1643 | /* Cache dontcare flag because file->dontcare can be changed once we
|
|---|
| 1644 | return. Check dontcare inheritance mechanism for details. */
|
|---|
| 1645 | c->dontcare = file->dontcare;
|
|---|
| 1646 |
|
|---|
| 1647 | /* Start saving output in case the expansion uses $(info ...) etc. */
|
|---|
| 1648 | OUTPUT_SET (&c->output);
|
|---|
| 1649 |
|
|---|
| 1650 | /* Expand the command lines and store the results in LINES. */
|
|---|
| 1651 | lines = xmalloc (cmds->ncommand_lines * sizeof (char *));
|
|---|
| 1652 | for (i = 0; i < cmds->ncommand_lines; ++i)
|
|---|
| 1653 | {
|
|---|
| 1654 | /* Collapse backslash-newline combinations that are inside variable
|
|---|
| 1655 | or function references. These are left alone by the parser so
|
|---|
| 1656 | that they will appear in the echoing of commands (where they look
|
|---|
| 1657 | nice); and collapsed by construct_command_argv when it tokenizes.
|
|---|
| 1658 | But letting them survive inside function invocations loses because
|
|---|
| 1659 | we don't want the functions to see them as part of the text. */
|
|---|
| 1660 |
|
|---|
| 1661 | char *in, *out, *ref;
|
|---|
| 1662 |
|
|---|
| 1663 | /* IN points to where in the line we are scanning.
|
|---|
| 1664 | OUT points to where in the line we are writing.
|
|---|
| 1665 | When we collapse a backslash-newline combination,
|
|---|
| 1666 | IN gets ahead of OUT. */
|
|---|
| 1667 |
|
|---|
| 1668 | in = out = cmds->command_lines[i];
|
|---|
| 1669 | while ((ref = strchr (in, '$')) != 0)
|
|---|
| 1670 | {
|
|---|
| 1671 | ++ref; /* Move past the $. */
|
|---|
| 1672 |
|
|---|
| 1673 | if (out != in)
|
|---|
| 1674 | /* Copy the text between the end of the last chunk
|
|---|
| 1675 | we processed (where IN points) and the new chunk
|
|---|
| 1676 | we are about to process (where REF points). */
|
|---|
| 1677 | memmove (out, in, ref - in);
|
|---|
| 1678 |
|
|---|
| 1679 | /* Move both pointers past the boring stuff. */
|
|---|
| 1680 | out += ref - in;
|
|---|
| 1681 | in = ref;
|
|---|
| 1682 |
|
|---|
| 1683 | if (*ref == '(' || *ref == '{')
|
|---|
| 1684 | {
|
|---|
| 1685 | char openparen = *ref;
|
|---|
| 1686 | char closeparen = openparen == '(' ? ')' : '}';
|
|---|
| 1687 | char *outref;
|
|---|
| 1688 | int count;
|
|---|
| 1689 | char *p;
|
|---|
| 1690 |
|
|---|
| 1691 | *out++ = *in++; /* Copy OPENPAREN. */
|
|---|
| 1692 | outref = out;
|
|---|
| 1693 | /* IN now points past the opening paren or brace.
|
|---|
| 1694 | Count parens or braces until it is matched. */
|
|---|
| 1695 | count = 0;
|
|---|
| 1696 | while (*in != '\0')
|
|---|
| 1697 | {
|
|---|
| 1698 | if (*in == closeparen && --count < 0)
|
|---|
| 1699 | break;
|
|---|
| 1700 | else if (*in == '\\' && in[1] == '\n')
|
|---|
| 1701 | {
|
|---|
| 1702 | /* We have found a backslash-newline inside a
|
|---|
| 1703 | variable or function reference. Eat it and
|
|---|
| 1704 | any following whitespace. */
|
|---|
| 1705 |
|
|---|
| 1706 | int quoted = 0;
|
|---|
| 1707 | for (p = in - 1; p > ref && *p == '\\'; --p)
|
|---|
| 1708 | quoted = !quoted;
|
|---|
| 1709 |
|
|---|
| 1710 | if (quoted)
|
|---|
| 1711 | /* There were two or more backslashes, so this is
|
|---|
| 1712 | not really a continuation line. We don't collapse
|
|---|
| 1713 | the quoting backslashes here as is done in
|
|---|
| 1714 | collapse_continuations, because the line will
|
|---|
| 1715 | be collapsed again after expansion. */
|
|---|
| 1716 | *out++ = *in++;
|
|---|
| 1717 | else
|
|---|
| 1718 | {
|
|---|
| 1719 | /* Skip the backslash, newline, and whitespace. */
|
|---|
| 1720 | in += 2;
|
|---|
| 1721 | NEXT_TOKEN (in);
|
|---|
| 1722 |
|
|---|
| 1723 | /* Discard any preceding whitespace that has
|
|---|
| 1724 | already been written to the output. */
|
|---|
| 1725 | while (out > outref && ISBLANK (out[-1]))
|
|---|
| 1726 | --out;
|
|---|
| 1727 |
|
|---|
| 1728 | /* Replace it all with a single space. */
|
|---|
| 1729 | *out++ = ' ';
|
|---|
| 1730 | }
|
|---|
| 1731 | }
|
|---|
| 1732 | else
|
|---|
| 1733 | {
|
|---|
| 1734 | if (*in == openparen)
|
|---|
| 1735 | ++count;
|
|---|
| 1736 |
|
|---|
| 1737 | *out++ = *in++;
|
|---|
| 1738 | }
|
|---|
| 1739 | }
|
|---|
| 1740 | }
|
|---|
| 1741 | }
|
|---|
| 1742 |
|
|---|
| 1743 | /* There are no more references in this line to worry about.
|
|---|
| 1744 | Copy the remaining uninteresting text to the output. */
|
|---|
| 1745 | if (out != in)
|
|---|
| 1746 | memmove (out, in, strlen (in) + 1);
|
|---|
| 1747 |
|
|---|
| 1748 | /* Finally, expand the line. */
|
|---|
| 1749 | cmds->fileinfo.offset = i;
|
|---|
| 1750 | lines[i] = allocated_variable_expand_for_file (cmds->command_lines[i],
|
|---|
| 1751 | file);
|
|---|
| 1752 | }
|
|---|
| 1753 |
|
|---|
| 1754 | cmds->fileinfo.offset = 0;
|
|---|
| 1755 | c->command_lines = lines;
|
|---|
| 1756 |
|
|---|
| 1757 | /* Fetch the first command line to be run. */
|
|---|
| 1758 | job_next_command (c);
|
|---|
| 1759 |
|
|---|
| 1760 | /* Wait for a job slot to be freed up. If we allow an infinite number
|
|---|
| 1761 | don't bother; also job_slots will == 0 if we're using the jobserver. */
|
|---|
| 1762 |
|
|---|
| 1763 | if (job_slots != 0)
|
|---|
| 1764 | while (job_slots_used == job_slots)
|
|---|
| 1765 | reap_children (1, 0);
|
|---|
| 1766 |
|
|---|
| 1767 | #ifdef MAKE_JOBSERVER
|
|---|
| 1768 | /* If we are controlling multiple jobs make sure we have a token before
|
|---|
| 1769 | starting the child. */
|
|---|
| 1770 |
|
|---|
| 1771 | /* This can be inefficient. There's a decent chance that this job won't
|
|---|
| 1772 | actually have to run any subprocesses: the command script may be empty
|
|---|
| 1773 | or otherwise optimized away. It would be nice if we could defer
|
|---|
| 1774 | obtaining a token until just before we need it, in start_job_command.
|
|---|
| 1775 | To do that we'd need to keep track of whether we'd already obtained a
|
|---|
| 1776 | token (since start_job_command is called for each line of the job, not
|
|---|
| 1777 | just once). Also more thought needs to go into the entire algorithm;
|
|---|
| 1778 | this is where the old parallel job code waits, so... */
|
|---|
| 1779 |
|
|---|
| 1780 | else if (jobserver_enabled ())
|
|---|
| 1781 | while (1)
|
|---|
| 1782 | {
|
|---|
| 1783 | int got_token;
|
|---|
| 1784 |
|
|---|
| 1785 | DB (DB_JOBS, ("Need a job token; we %shave children\n",
|
|---|
| 1786 | children ? "" : "don't "));
|
|---|
| 1787 |
|
|---|
| 1788 | /* If we don't already have a job started, use our "free" token. */
|
|---|
| 1789 | if (!jobserver_tokens)
|
|---|
| 1790 | break;
|
|---|
| 1791 |
|
|---|
| 1792 | /* Prepare for jobserver token acquisition. */
|
|---|
| 1793 | jobserver_pre_acquire ();
|
|---|
| 1794 |
|
|---|
| 1795 | /* Reap anything that's currently waiting. */
|
|---|
| 1796 | reap_children (0, 0);
|
|---|
| 1797 |
|
|---|
| 1798 | /* Kick off any jobs we have waiting for an opportunity that
|
|---|
| 1799 | can run now (i.e., waiting for load). */
|
|---|
| 1800 | start_waiting_jobs ();
|
|---|
| 1801 |
|
|---|
| 1802 | /* If our "free" slot is available, use it; we don't need a token. */
|
|---|
| 1803 | if (!jobserver_tokens)
|
|---|
| 1804 | break;
|
|---|
| 1805 |
|
|---|
| 1806 | /* There must be at least one child already, or we have no business
|
|---|
| 1807 | waiting for a token. */
|
|---|
| 1808 | if (!children)
|
|---|
| 1809 | O (fatal, NILF, "INTERNAL: no children as we go to sleep on read\n");
|
|---|
| 1810 |
|
|---|
| 1811 | /* Get a token. */
|
|---|
| 1812 | got_token = jobserver_acquire (waiting_jobs != NULL);
|
|---|
| 1813 |
|
|---|
| 1814 | /* If we got one, we're done here. */
|
|---|
| 1815 | if (got_token == 1)
|
|---|
| 1816 | {
|
|---|
| 1817 | DB (DB_JOBS, (_("Obtained token for child %p (%s).\n"),
|
|---|
| 1818 | c, c->file->name));
|
|---|
| 1819 | break;
|
|---|
| 1820 | }
|
|---|
| 1821 | }
|
|---|
| 1822 | #endif
|
|---|
| 1823 |
|
|---|
| 1824 | ++jobserver_tokens;
|
|---|
| 1825 |
|
|---|
| 1826 | /* Trace the build.
|
|---|
| 1827 | Use message here so that changes to working directories are logged. */
|
|---|
| 1828 | if (trace_flag)
|
|---|
| 1829 | {
|
|---|
| 1830 | char *newer = allocated_variable_expand_for_file ("$?", c->file);
|
|---|
| 1831 | const char *nm;
|
|---|
| 1832 |
|
|---|
| 1833 | if (! cmds->fileinfo.filenm)
|
|---|
| 1834 | nm = _("<builtin>");
|
|---|
| 1835 | else
|
|---|
| 1836 | {
|
|---|
| 1837 | char *n = alloca (strlen (cmds->fileinfo.filenm) + 1 + 11 + 1);
|
|---|
| 1838 | sprintf (n, "%s:%lu", cmds->fileinfo.filenm, cmds->fileinfo.lineno);
|
|---|
| 1839 | nm = n;
|
|---|
| 1840 | }
|
|---|
| 1841 |
|
|---|
| 1842 | if (newer[0] == '\0')
|
|---|
| 1843 | OSS (message, 0,
|
|---|
| 1844 | _("%s: target '%s' does not exist"), nm, c->file->name);
|
|---|
| 1845 | else
|
|---|
| 1846 | OSSS (message, 0,
|
|---|
| 1847 | _("%s: update target '%s' due to: %s"), nm, c->file->name, newer);
|
|---|
| 1848 |
|
|---|
| 1849 | free (newer);
|
|---|
| 1850 | }
|
|---|
| 1851 |
|
|---|
| 1852 | /* The job is now primed. Start it running.
|
|---|
| 1853 | (This will notice if there is in fact no recipe.) */
|
|---|
| 1854 | start_waiting_job (c);
|
|---|
| 1855 |
|
|---|
| 1856 | if (job_slots == 1 || not_parallel)
|
|---|
| 1857 | /* Since there is only one job slot, make things run linearly.
|
|---|
| 1858 | Wait for the child to die, setting the state to 'cs_finished'. */
|
|---|
| 1859 | while (file->command_state == cs_running)
|
|---|
| 1860 | reap_children (1, 0);
|
|---|
| 1861 |
|
|---|
| 1862 | OUTPUT_UNSET ();
|
|---|
| 1863 | return;
|
|---|
| 1864 | }
|
|---|
| 1865 | |
|---|
| 1866 |
|
|---|
| 1867 | /* Move CHILD's pointers to the next command for it to execute.
|
|---|
| 1868 | Returns nonzero if there is another command. */
|
|---|
| 1869 |
|
|---|
| 1870 | static int
|
|---|
| 1871 | job_next_command (struct child *child)
|
|---|
| 1872 | {
|
|---|
| 1873 | while (child->command_ptr == 0 || *child->command_ptr == '\0')
|
|---|
| 1874 | {
|
|---|
| 1875 | /* There are no more lines in the expansion of this line. */
|
|---|
| 1876 | if (child->command_line == child->file->cmds->ncommand_lines)
|
|---|
| 1877 | {
|
|---|
| 1878 | /* There are no more lines to be expanded. */
|
|---|
| 1879 | child->command_ptr = 0;
|
|---|
| 1880 | child->file->cmds->fileinfo.offset = 0;
|
|---|
| 1881 | return 0;
|
|---|
| 1882 | }
|
|---|
| 1883 | else
|
|---|
| 1884 | /* Get the next line to run. */
|
|---|
| 1885 | child->command_ptr = child->command_lines[child->command_line++];
|
|---|
| 1886 | }
|
|---|
| 1887 |
|
|---|
| 1888 | child->file->cmds->fileinfo.offset = child->command_line - 1;
|
|---|
| 1889 | return 1;
|
|---|
| 1890 | }
|
|---|
| 1891 |
|
|---|
| 1892 | /* Determine if the load average on the system is too high to start a new job.
|
|---|
| 1893 | The real system load average is only recomputed once a second. However, a
|
|---|
| 1894 | very parallel make can easily start tens or even hundreds of jobs in a
|
|---|
| 1895 | second, which brings the system to its knees for a while until that first
|
|---|
| 1896 | batch of jobs clears out.
|
|---|
| 1897 |
|
|---|
| 1898 | To avoid this we use a weighted algorithm to try to account for jobs which
|
|---|
| 1899 | have been started since the last second, and guess what the load average
|
|---|
| 1900 | would be now if it were computed.
|
|---|
| 1901 |
|
|---|
| 1902 | This algorithm was provided by Thomas Riedl <thomas.riedl@siemens.com>,
|
|---|
| 1903 | who writes:
|
|---|
| 1904 |
|
|---|
| 1905 | ! calculate something load-oid and add to the observed sys.load,
|
|---|
| 1906 | ! so that latter can catch up:
|
|---|
| 1907 | ! - every job started increases jobctr;
|
|---|
| 1908 | ! - every dying job decreases a positive jobctr;
|
|---|
| 1909 | ! - the jobctr value gets zeroed every change of seconds,
|
|---|
| 1910 | ! after its value*weight_b is stored into the 'backlog' value last_sec
|
|---|
| 1911 | ! - weight_a times the sum of jobctr and last_sec gets
|
|---|
| 1912 | ! added to the observed sys.load.
|
|---|
| 1913 | !
|
|---|
| 1914 | ! The two weights have been tried out on 24 and 48 proc. Sun Solaris-9
|
|---|
| 1915 | ! machines, using a several-thousand-jobs-mix of cpp, cc, cxx and smallish
|
|---|
| 1916 | ! sub-shelled commands (rm, echo, sed...) for tests.
|
|---|
| 1917 | ! lowering the 'direct influence' factor weight_a (e.g. to 0.1)
|
|---|
| 1918 | ! resulted in significant excession of the load limit, raising it
|
|---|
| 1919 | ! (e.g. to 0.5) took bad to small, fast-executing jobs and didn't
|
|---|
| 1920 | ! reach the limit in most test cases.
|
|---|
| 1921 | !
|
|---|
| 1922 | ! lowering the 'history influence' weight_b (e.g. to 0.1) resulted in
|
|---|
| 1923 | ! exceeding the limit for longer-running stuff (compile jobs in
|
|---|
| 1924 | ! the .5 to 1.5 sec. range),raising it (e.g. to 0.5) overrepresented
|
|---|
| 1925 | ! small jobs' effects.
|
|---|
| 1926 |
|
|---|
| 1927 | */
|
|---|
| 1928 |
|
|---|
| 1929 | #define LOAD_WEIGHT_A 0.25
|
|---|
| 1930 | #define LOAD_WEIGHT_B 0.25
|
|---|
| 1931 |
|
|---|
| 1932 | static int
|
|---|
| 1933 | load_too_high (void)
|
|---|
| 1934 | {
|
|---|
| 1935 | #if defined(__MSDOS__) || defined(VMS) || defined(_AMIGA) || defined(__riscos__)
|
|---|
| 1936 | return 1;
|
|---|
| 1937 | #else
|
|---|
| 1938 | static double last_sec;
|
|---|
| 1939 | static time_t last_now;
|
|---|
| 1940 | double load, guess;
|
|---|
| 1941 | time_t now;
|
|---|
| 1942 |
|
|---|
| 1943 | #ifdef WINDOWS32
|
|---|
| 1944 | /* sub_proc.c cannot wait for more than MAXIMUM_WAIT_OBJECTS children */
|
|---|
| 1945 | if (process_used_slots () >= MAXIMUM_WAIT_OBJECTS)
|
|---|
| 1946 | return 1;
|
|---|
| 1947 | #endif
|
|---|
| 1948 |
|
|---|
| 1949 | if (max_load_average < 0)
|
|---|
| 1950 | return 0;
|
|---|
| 1951 |
|
|---|
| 1952 | /* Find the real system load average. */
|
|---|
| 1953 | make_access ();
|
|---|
| 1954 | if (getloadavg (&load, 1) != 1)
|
|---|
| 1955 | {
|
|---|
| 1956 | static int lossage = -1;
|
|---|
| 1957 | /* Complain only once for the same error. */
|
|---|
| 1958 | if (lossage == -1 || errno != lossage)
|
|---|
| 1959 | {
|
|---|
| 1960 | if (errno == 0)
|
|---|
| 1961 | /* An errno value of zero means getloadavg is just unsupported. */
|
|---|
| 1962 | O (error, NILF,
|
|---|
| 1963 | _("cannot enforce load limits on this operating system"));
|
|---|
| 1964 | else
|
|---|
| 1965 | perror_with_name (_("cannot enforce load limit: "), "getloadavg");
|
|---|
| 1966 | }
|
|---|
| 1967 | lossage = errno;
|
|---|
| 1968 | load = 0;
|
|---|
| 1969 | }
|
|---|
| 1970 | user_access ();
|
|---|
| 1971 |
|
|---|
| 1972 | /* If we're in a new second zero the counter and correct the backlog
|
|---|
| 1973 | value. Only keep the backlog for one extra second; after that it's 0. */
|
|---|
| 1974 | now = time (NULL);
|
|---|
| 1975 | if (last_now < now)
|
|---|
| 1976 | {
|
|---|
| 1977 | if (last_now == now - 1)
|
|---|
| 1978 | last_sec = LOAD_WEIGHT_B * job_counter;
|
|---|
| 1979 | else
|
|---|
| 1980 | last_sec = 0.0;
|
|---|
| 1981 |
|
|---|
| 1982 | job_counter = 0;
|
|---|
| 1983 | last_now = now;
|
|---|
| 1984 | }
|
|---|
| 1985 |
|
|---|
| 1986 | /* Try to guess what the load would be right now. */
|
|---|
| 1987 | guess = load + (LOAD_WEIGHT_A * (job_counter + last_sec));
|
|---|
| 1988 |
|
|---|
| 1989 | DB (DB_JOBS, ("Estimated system load = %f (actual = %f) (max requested = %f)\n",
|
|---|
| 1990 | guess, load, max_load_average));
|
|---|
| 1991 |
|
|---|
| 1992 | return guess >= max_load_average;
|
|---|
| 1993 | #endif
|
|---|
| 1994 | }
|
|---|
| 1995 |
|
|---|
| 1996 | /* Start jobs that are waiting for the load to be lower. */
|
|---|
| 1997 |
|
|---|
| 1998 | void
|
|---|
| 1999 | start_waiting_jobs (void)
|
|---|
| 2000 | {
|
|---|
| 2001 | struct child *job;
|
|---|
| 2002 |
|
|---|
| 2003 | if (waiting_jobs == 0)
|
|---|
| 2004 | return;
|
|---|
| 2005 |
|
|---|
| 2006 | do
|
|---|
| 2007 | {
|
|---|
| 2008 | /* Check for recently deceased descendants. */
|
|---|
| 2009 | reap_children (0, 0);
|
|---|
| 2010 |
|
|---|
| 2011 | /* Take a job off the waiting list. */
|
|---|
| 2012 | job = waiting_jobs;
|
|---|
| 2013 | waiting_jobs = job->next;
|
|---|
| 2014 |
|
|---|
| 2015 | /* Try to start that job. We break out of the loop as soon
|
|---|
| 2016 | as start_waiting_job puts one back on the waiting list. */
|
|---|
| 2017 | }
|
|---|
| 2018 | while (start_waiting_job (job) && waiting_jobs != 0);
|
|---|
| 2019 |
|
|---|
| 2020 | return;
|
|---|
| 2021 | }
|
|---|
| 2022 | |
|---|
| 2023 |
|
|---|
| 2024 | #ifndef WINDOWS32
|
|---|
| 2025 |
|
|---|
| 2026 | /* EMX: Start a child process. This function returns the new pid. */
|
|---|
| 2027 | # if defined __EMX__
|
|---|
| 2028 | int
|
|---|
| 2029 | child_execute_job (struct output *out, int good_stdin, char **argv, char **envp)
|
|---|
| 2030 | {
|
|---|
| 2031 | int pid;
|
|---|
| 2032 | int fdin = good_stdin ? FD_STDIN : get_bad_stdin ();
|
|---|
| 2033 | int fdout = FD_STDOUT;
|
|---|
| 2034 | int fderr = FD_STDERR;
|
|---|
| 2035 | int save_fdin = -1;
|
|---|
| 2036 | int save_fdout = -1;
|
|---|
| 2037 | int save_fderr = -1;
|
|---|
| 2038 |
|
|---|
| 2039 | /* Divert child output if we want to capture output. */
|
|---|
| 2040 | if (out && out->syncout)
|
|---|
| 2041 | {
|
|---|
| 2042 | if (out->out >= 0)
|
|---|
| 2043 | fdout = out->out;
|
|---|
| 2044 | if (out->err >= 0)
|
|---|
| 2045 | fderr = out->err;
|
|---|
| 2046 | }
|
|---|
| 2047 |
|
|---|
| 2048 | /* For each FD which needs to be redirected first make a dup of the standard
|
|---|
| 2049 | FD to save and mark it close on exec so our child won't see it. Then
|
|---|
| 2050 | dup2() the standard FD to the redirect FD, and also mark the redirect FD
|
|---|
| 2051 | as close on exec. */
|
|---|
| 2052 | if (fdin != FD_STDIN)
|
|---|
| 2053 | {
|
|---|
| 2054 | save_fdin = dup (FD_STDIN);
|
|---|
| 2055 | if (save_fdin < 0)
|
|---|
| 2056 | O (fatal, NILF, _("no more file handles: could not duplicate stdin\n"));
|
|---|
| 2057 | CLOSE_ON_EXEC (save_fdin);
|
|---|
| 2058 |
|
|---|
| 2059 | dup2 (fdin, FD_STDIN);
|
|---|
| 2060 | CLOSE_ON_EXEC (fdin);
|
|---|
| 2061 | }
|
|---|
| 2062 |
|
|---|
| 2063 | if (fdout != FD_STDOUT)
|
|---|
| 2064 | {
|
|---|
| 2065 | save_fdout = dup (FD_STDOUT);
|
|---|
| 2066 | if (save_fdout < 0)
|
|---|
| 2067 | O (fatal, NILF,
|
|---|
| 2068 | _("no more file handles: could not duplicate stdout\n"));
|
|---|
| 2069 | CLOSE_ON_EXEC (save_fdout);
|
|---|
| 2070 |
|
|---|
| 2071 | dup2 (fdout, FD_STDOUT);
|
|---|
| 2072 | CLOSE_ON_EXEC (fdout);
|
|---|
| 2073 | }
|
|---|
| 2074 |
|
|---|
| 2075 | if (fderr != FD_STDERR)
|
|---|
| 2076 | {
|
|---|
| 2077 | if (fderr != fdout)
|
|---|
| 2078 | {
|
|---|
| 2079 | save_fderr = dup (FD_STDERR);
|
|---|
| 2080 | if (save_fderr < 0)
|
|---|
| 2081 | O (fatal, NILF,
|
|---|
| 2082 | _("no more file handles: could not duplicate stderr\n"));
|
|---|
| 2083 | CLOSE_ON_EXEC (save_fderr);
|
|---|
| 2084 | }
|
|---|
| 2085 |
|
|---|
| 2086 | dup2 (fderr, FD_STDERR);
|
|---|
| 2087 | CLOSE_ON_EXEC (fderr);
|
|---|
| 2088 | }
|
|---|
| 2089 |
|
|---|
| 2090 | /* Run the command. */
|
|---|
| 2091 | pid = exec_command (argv, envp);
|
|---|
| 2092 |
|
|---|
| 2093 | /* Restore stdout/stdin/stderr of the parent and close temporary FDs. */
|
|---|
| 2094 | if (save_fdin >= 0)
|
|---|
| 2095 | {
|
|---|
| 2096 | if (dup2 (save_fdin, FD_STDIN) != FD_STDIN)
|
|---|
| 2097 | O (fatal, NILF, _("Could not restore stdin\n"));
|
|---|
| 2098 | else
|
|---|
| 2099 | close (save_fdin);
|
|---|
| 2100 | }
|
|---|
| 2101 |
|
|---|
| 2102 | if (save_fdout >= 0)
|
|---|
| 2103 | {
|
|---|
| 2104 | if (dup2 (save_fdout, FD_STDOUT) != FD_STDOUT)
|
|---|
| 2105 | O (fatal, NILF, _("Could not restore stdout\n"));
|
|---|
| 2106 | else
|
|---|
| 2107 | close (save_fdout);
|
|---|
| 2108 | }
|
|---|
| 2109 |
|
|---|
| 2110 | if (save_fderr >= 0)
|
|---|
| 2111 | {
|
|---|
| 2112 | if (dup2 (save_fderr, FD_STDERR) != FD_STDERR)
|
|---|
| 2113 | O (fatal, NILF, _("Could not restore stderr\n"));
|
|---|
| 2114 | else
|
|---|
| 2115 | close (save_fderr);
|
|---|
| 2116 | }
|
|---|
| 2117 |
|
|---|
| 2118 | return pid;
|
|---|
| 2119 | }
|
|---|
| 2120 |
|
|---|
| 2121 | #elif !defined (_AMIGA) && !defined (__MSDOS__) && !defined (VMS)
|
|---|
| 2122 |
|
|---|
| 2123 | /* POSIX:
|
|---|
| 2124 | Create a child process executing the command in ARGV.
|
|---|
| 2125 | ENVP is the environment of the new program. Returns the PID or -1. */
|
|---|
| 2126 | int
|
|---|
| 2127 | child_execute_job (struct output *out, int good_stdin, char **argv, char **envp)
|
|---|
| 2128 | {
|
|---|
| 2129 | int r;
|
|---|
| 2130 | int pid;
|
|---|
| 2131 | int fdin = good_stdin ? FD_STDIN : get_bad_stdin ();
|
|---|
| 2132 | int fdout = FD_STDOUT;
|
|---|
| 2133 | int fderr = FD_STDERR;
|
|---|
| 2134 |
|
|---|
| 2135 | /* Divert child output if we want to capture it. */
|
|---|
| 2136 | if (out && out->syncout)
|
|---|
| 2137 | {
|
|---|
| 2138 | if (out->out >= 0)
|
|---|
| 2139 | fdout = out->out;
|
|---|
| 2140 | if (out->err >= 0)
|
|---|
| 2141 | fderr = out->err;
|
|---|
| 2142 | }
|
|---|
| 2143 |
|
|---|
| 2144 | pid = vfork();
|
|---|
| 2145 | if (pid != 0)
|
|---|
| 2146 | return pid;
|
|---|
| 2147 |
|
|---|
| 2148 | /* We are the child. */
|
|---|
| 2149 | unblock_sigs ();
|
|---|
| 2150 |
|
|---|
| 2151 | #ifdef SET_STACK_SIZE
|
|---|
| 2152 | /* Reset limits, if necessary. */
|
|---|
| 2153 | if (stack_limit.rlim_cur)
|
|---|
| 2154 | setrlimit (RLIMIT_STACK, &stack_limit);
|
|---|
| 2155 | #endif
|
|---|
| 2156 |
|
|---|
| 2157 | /* For any redirected FD, dup2() it to the standard FD.
|
|---|
| 2158 | They are all marked close-on-exec already. */
|
|---|
| 2159 | if (fdin != FD_STDIN)
|
|---|
| 2160 | EINTRLOOP (r, dup2 (fdin, FD_STDIN));
|
|---|
| 2161 | if (fdout != FD_STDOUT)
|
|---|
| 2162 | EINTRLOOP (r, dup2 (fdout, FD_STDOUT));
|
|---|
| 2163 | if (fderr != FD_STDERR)
|
|---|
| 2164 | EINTRLOOP (r, dup2 (fderr, FD_STDERR));
|
|---|
| 2165 |
|
|---|
| 2166 | /* Run the command. */
|
|---|
| 2167 | exec_command (argv, envp);
|
|---|
| 2168 | }
|
|---|
| 2169 | #endif /* !AMIGA && !__MSDOS__ && !VMS */
|
|---|
| 2170 | #endif /* !WINDOWS32 */
|
|---|
| 2171 | |
|---|
| 2172 |
|
|---|
| 2173 | #ifndef _AMIGA
|
|---|
| 2174 | /* Replace the current process with one running the command in ARGV,
|
|---|
| 2175 | with environment ENVP. This function does not return. */
|
|---|
| 2176 |
|
|---|
| 2177 | /* EMX: This function returns the pid of the child process. */
|
|---|
| 2178 | # ifdef __EMX__
|
|---|
| 2179 | int
|
|---|
| 2180 | # else
|
|---|
| 2181 | void
|
|---|
| 2182 | # endif
|
|---|
| 2183 | exec_command (char **argv, char **envp)
|
|---|
| 2184 | {
|
|---|
| 2185 | #ifdef VMS
|
|---|
| 2186 | /* to work around a problem with signals and execve: ignore them */
|
|---|
| 2187 | #ifdef SIGCHLD
|
|---|
| 2188 | signal (SIGCHLD,SIG_IGN);
|
|---|
| 2189 | #endif
|
|---|
| 2190 | /* Run the program. */
|
|---|
| 2191 | execve (argv[0], argv, envp);
|
|---|
| 2192 | perror_with_name ("execve: ", argv[0]);
|
|---|
| 2193 | _exit (EXIT_FAILURE);
|
|---|
| 2194 | #else
|
|---|
| 2195 | #ifdef WINDOWS32
|
|---|
| 2196 | HANDLE hPID;
|
|---|
| 2197 | HANDLE hWaitPID;
|
|---|
| 2198 | int exit_code = EXIT_FAILURE;
|
|---|
| 2199 |
|
|---|
| 2200 | /* make sure CreateProcess() has Path it needs */
|
|---|
| 2201 | sync_Path_environment ();
|
|---|
| 2202 |
|
|---|
| 2203 | /* launch command */
|
|---|
| 2204 | hPID = process_easy (argv, envp, -1, -1);
|
|---|
| 2205 |
|
|---|
| 2206 | /* make sure launch ok */
|
|---|
| 2207 | if (hPID == INVALID_HANDLE_VALUE)
|
|---|
| 2208 | {
|
|---|
| 2209 | int i;
|
|---|
| 2210 | fprintf (stderr, _("process_easy() failed to launch process (e=%ld)\n"),
|
|---|
| 2211 | process_last_err (hPID));
|
|---|
| 2212 | for (i = 0; argv[i]; i++)
|
|---|
| 2213 | fprintf (stderr, "%s ", argv[i]);
|
|---|
| 2214 | fprintf (stderr, _("\nCounted %d args in failed launch\n"), i);
|
|---|
| 2215 | exit (EXIT_FAILURE);
|
|---|
| 2216 | }
|
|---|
| 2217 |
|
|---|
| 2218 | /* wait and reap last child */
|
|---|
| 2219 | hWaitPID = process_wait_for_any (1, 0);
|
|---|
| 2220 | while (hWaitPID)
|
|---|
| 2221 | {
|
|---|
| 2222 | /* was an error found on this process? */
|
|---|
| 2223 | int err = process_last_err (hWaitPID);
|
|---|
| 2224 |
|
|---|
| 2225 | /* get exit data */
|
|---|
| 2226 | exit_code = process_exit_code (hWaitPID);
|
|---|
| 2227 |
|
|---|
| 2228 | if (err)
|
|---|
| 2229 | fprintf (stderr, "make (e=%d, rc=%d): %s",
|
|---|
| 2230 | err, exit_code, map_windows32_error_to_string (err));
|
|---|
| 2231 |
|
|---|
| 2232 | /* cleanup process */
|
|---|
| 2233 | process_cleanup (hWaitPID);
|
|---|
| 2234 |
|
|---|
| 2235 | /* expect to find only last pid, warn about other pids reaped */
|
|---|
| 2236 | if (hWaitPID == hPID)
|
|---|
| 2237 | break;
|
|---|
| 2238 | else
|
|---|
| 2239 | {
|
|---|
| 2240 | char *pidstr = xstrdup (pid2str ((pid_t)hWaitPID));
|
|---|
| 2241 |
|
|---|
| 2242 | fprintf (stderr,
|
|---|
| 2243 | _("make reaped child pid %s, still waiting for pid %s\n"),
|
|---|
| 2244 | pidstr, pid2str ((pid_t)hPID));
|
|---|
| 2245 | free (pidstr);
|
|---|
| 2246 | }
|
|---|
| 2247 | }
|
|---|
| 2248 |
|
|---|
| 2249 | /* return child's exit code as our exit code */
|
|---|
| 2250 | exit (exit_code);
|
|---|
| 2251 |
|
|---|
| 2252 | #else /* !WINDOWS32 */
|
|---|
| 2253 |
|
|---|
| 2254 | # ifdef __EMX__
|
|---|
| 2255 | int pid;
|
|---|
| 2256 | # endif
|
|---|
| 2257 |
|
|---|
| 2258 | /* Be the user, permanently. */
|
|---|
| 2259 | child_access ();
|
|---|
| 2260 |
|
|---|
| 2261 | # ifdef __EMX__
|
|---|
| 2262 | /* Run the program. */
|
|---|
| 2263 | pid = spawnvpe (P_NOWAIT, argv[0], argv, envp);
|
|---|
| 2264 | if (pid >= 0)
|
|---|
| 2265 | return pid;
|
|---|
| 2266 |
|
|---|
| 2267 | /* the file might have a strange shell extension */
|
|---|
| 2268 | if (errno == ENOENT)
|
|---|
| 2269 | errno = ENOEXEC;
|
|---|
| 2270 |
|
|---|
| 2271 | # else
|
|---|
| 2272 | /* Run the program. */
|
|---|
| 2273 | environ = envp;
|
|---|
| 2274 | execvp (argv[0], argv);
|
|---|
| 2275 |
|
|---|
| 2276 | # endif /* !__EMX__ */
|
|---|
| 2277 |
|
|---|
| 2278 | switch (errno)
|
|---|
| 2279 | {
|
|---|
| 2280 | case ENOENT:
|
|---|
| 2281 | /* We are in the child: don't use the output buffer.
|
|---|
| 2282 | It's not right to run fprintf() here! */
|
|---|
| 2283 | if (makelevel == 0)
|
|---|
| 2284 | fprintf (stderr, _("%s: %s: Command not found\n"), program, argv[0]);
|
|---|
| 2285 | else
|
|---|
| 2286 | fprintf (stderr, _("%s[%u]: %s: Command not found\n"),
|
|---|
| 2287 | program, makelevel, argv[0]);
|
|---|
| 2288 | break;
|
|---|
| 2289 | case ENOEXEC:
|
|---|
| 2290 | {
|
|---|
| 2291 | /* The file is not executable. Try it as a shell script. */
|
|---|
| 2292 | const char *shell;
|
|---|
| 2293 | char **new_argv;
|
|---|
| 2294 | int argc;
|
|---|
| 2295 | int i=1;
|
|---|
| 2296 |
|
|---|
| 2297 | # ifdef __EMX__
|
|---|
| 2298 | /* Do not use $SHELL from the environment */
|
|---|
| 2299 | struct variable *p = lookup_variable ("SHELL", 5);
|
|---|
| 2300 | if (p)
|
|---|
| 2301 | shell = p->value;
|
|---|
| 2302 | else
|
|---|
| 2303 | shell = 0;
|
|---|
| 2304 | # else
|
|---|
| 2305 | shell = getenv ("SHELL");
|
|---|
| 2306 | # endif
|
|---|
| 2307 | if (shell == 0)
|
|---|
| 2308 | shell = default_shell;
|
|---|
| 2309 |
|
|---|
| 2310 | argc = 1;
|
|---|
| 2311 | while (argv[argc] != 0)
|
|---|
| 2312 | ++argc;
|
|---|
| 2313 |
|
|---|
| 2314 | # ifdef __EMX__
|
|---|
| 2315 | if (!unixy_shell)
|
|---|
| 2316 | ++argc;
|
|---|
| 2317 | # endif
|
|---|
| 2318 |
|
|---|
| 2319 | new_argv = alloca ((1 + argc + 1) * sizeof (char *));
|
|---|
| 2320 | new_argv[0] = (char *)shell;
|
|---|
| 2321 |
|
|---|
| 2322 | # ifdef __EMX__
|
|---|
| 2323 | if (!unixy_shell)
|
|---|
| 2324 | {
|
|---|
| 2325 | new_argv[1] = "/c";
|
|---|
| 2326 | ++i;
|
|---|
| 2327 | --argc;
|
|---|
| 2328 | }
|
|---|
| 2329 | # endif
|
|---|
| 2330 |
|
|---|
| 2331 | new_argv[i] = argv[0];
|
|---|
| 2332 | while (argc > 0)
|
|---|
| 2333 | {
|
|---|
| 2334 | new_argv[i + argc] = argv[argc];
|
|---|
| 2335 | --argc;
|
|---|
| 2336 | }
|
|---|
| 2337 |
|
|---|
| 2338 | # ifdef __EMX__
|
|---|
| 2339 | pid = spawnvpe (P_NOWAIT, shell, new_argv, envp);
|
|---|
| 2340 | if (pid >= 0)
|
|---|
| 2341 | break;
|
|---|
| 2342 | # else
|
|---|
| 2343 | execvp (shell, new_argv);
|
|---|
| 2344 | # endif
|
|---|
| 2345 | if (errno == ENOENT)
|
|---|
| 2346 | OS (error, NILF, _("%s: Shell program not found"), shell);
|
|---|
| 2347 | else
|
|---|
| 2348 | perror_with_name ("execvp: ", shell);
|
|---|
| 2349 | break;
|
|---|
| 2350 | }
|
|---|
| 2351 |
|
|---|
| 2352 | # ifdef __EMX__
|
|---|
| 2353 | case EINVAL:
|
|---|
| 2354 | /* this nasty error was driving me nuts :-( */
|
|---|
| 2355 | O (error, NILF, _("spawnvpe: environment space might be exhausted"));
|
|---|
| 2356 | /* FALLTHROUGH */
|
|---|
| 2357 | # endif
|
|---|
| 2358 |
|
|---|
| 2359 | default:
|
|---|
| 2360 | perror_with_name ("execvp: ", argv[0]);
|
|---|
| 2361 | break;
|
|---|
| 2362 | }
|
|---|
| 2363 |
|
|---|
| 2364 | # ifdef __EMX__
|
|---|
| 2365 | return pid;
|
|---|
| 2366 | # else
|
|---|
| 2367 | _exit (127);
|
|---|
| 2368 | # endif
|
|---|
| 2369 | #endif /* !WINDOWS32 */
|
|---|
| 2370 | #endif /* !VMS */
|
|---|
| 2371 | }
|
|---|
| 2372 | #else /* On Amiga */
|
|---|
| 2373 | void
|
|---|
| 2374 | exec_command (char **argv)
|
|---|
| 2375 | {
|
|---|
| 2376 | MyExecute (argv);
|
|---|
| 2377 | }
|
|---|
| 2378 |
|
|---|
| 2379 | void clean_tmp (void)
|
|---|
| 2380 | {
|
|---|
| 2381 | DeleteFile (amiga_bname);
|
|---|
| 2382 | }
|
|---|
| 2383 |
|
|---|
| 2384 | #endif /* On Amiga */
|
|---|
| 2385 | |
|---|
| 2386 |
|
|---|
| 2387 | #ifndef VMS
|
|---|
| 2388 | /* Figure out the argument list necessary to run LINE as a command. Try to
|
|---|
| 2389 | avoid using a shell. This routine handles only ' quoting, and " quoting
|
|---|
| 2390 | when no backslash, $ or ' characters are seen in the quotes. Starting
|
|---|
| 2391 | quotes may be escaped with a backslash. If any of the characters in
|
|---|
| 2392 | sh_chars is seen, or any of the builtin commands listed in sh_cmds
|
|---|
| 2393 | is the first word of a line, the shell is used.
|
|---|
| 2394 |
|
|---|
| 2395 | If RESTP is not NULL, *RESTP is set to point to the first newline in LINE.
|
|---|
| 2396 | If *RESTP is NULL, newlines will be ignored.
|
|---|
| 2397 |
|
|---|
| 2398 | SHELL is the shell to use, or nil to use the default shell.
|
|---|
| 2399 | IFS is the value of $IFS, or nil (meaning the default).
|
|---|
| 2400 |
|
|---|
| 2401 | FLAGS is the value of lines_flags for this command line. It is
|
|---|
| 2402 | used in the WINDOWS32 port to check whether + or $(MAKE) were found
|
|---|
| 2403 | in this command line, in which case the effect of just_print_flag
|
|---|
| 2404 | is overridden. */
|
|---|
| 2405 |
|
|---|
| 2406 | static char **
|
|---|
| 2407 | construct_command_argv_internal (char *line, char **restp, const char *shell,
|
|---|
| 2408 | const char *shellflags, const char *ifs,
|
|---|
| 2409 | int flags, char **batch_filename UNUSED)
|
|---|
| 2410 | {
|
|---|
| 2411 | #ifdef __MSDOS__
|
|---|
| 2412 | /* MSDOS supports both the stock DOS shell and ports of Unixy shells.
|
|---|
| 2413 | We call 'system' for anything that requires ''slow'' processing,
|
|---|
| 2414 | because DOS shells are too dumb. When $SHELL points to a real
|
|---|
| 2415 | (unix-style) shell, 'system' just calls it to do everything. When
|
|---|
| 2416 | $SHELL points to a DOS shell, 'system' does most of the work
|
|---|
| 2417 | internally, calling the shell only for its internal commands.
|
|---|
| 2418 | However, it looks on the $PATH first, so you can e.g. have an
|
|---|
| 2419 | external command named 'mkdir'.
|
|---|
| 2420 |
|
|---|
| 2421 | Since we call 'system', certain characters and commands below are
|
|---|
| 2422 | actually not specific to COMMAND.COM, but to the DJGPP implementation
|
|---|
| 2423 | of 'system'. In particular:
|
|---|
| 2424 |
|
|---|
| 2425 | The shell wildcard characters are in DOS_CHARS because they will
|
|---|
| 2426 | not be expanded if we call the child via 'spawnXX'.
|
|---|
| 2427 |
|
|---|
| 2428 | The ';' is in DOS_CHARS, because our 'system' knows how to run
|
|---|
| 2429 | multiple commands on a single line.
|
|---|
| 2430 |
|
|---|
| 2431 | DOS_CHARS also include characters special to 4DOS/NDOS, so we
|
|---|
| 2432 | won't have to tell one from another and have one more set of
|
|---|
| 2433 | commands and special characters. */
|
|---|
| 2434 | static const char *sh_chars_dos = "*?[];|<>%^&()";
|
|---|
| 2435 | static const char *sh_cmds_dos[] =
|
|---|
| 2436 | { "break", "call", "cd", "chcp", "chdir", "cls", "copy", "ctty", "date",
|
|---|
| 2437 | "del", "dir", "echo", "erase", "exit", "for", "goto", "if", "md",
|
|---|
| 2438 | "mkdir", "path", "pause", "prompt", "rd", "rmdir", "rem", "ren",
|
|---|
| 2439 | "rename", "set", "shift", "time", "type", "ver", "verify", "vol", ":",
|
|---|
| 2440 | 0 };
|
|---|
| 2441 |
|
|---|
| 2442 | static const char *sh_chars_sh = "#;\"*?[]&|<>(){}$`^";
|
|---|
| 2443 | static const char *sh_cmds_sh[] =
|
|---|
| 2444 | { "cd", "echo", "eval", "exec", "exit", "login", "logout", "set", "umask",
|
|---|
| 2445 | "wait", "while", "for", "case", "if", ":", ".", "break", "continue",
|
|---|
| 2446 | "export", "read", "readonly", "shift", "times", "trap", "switch",
|
|---|
| 2447 | "unset", "ulimit", 0 };
|
|---|
| 2448 |
|
|---|
| 2449 | const char *sh_chars;
|
|---|
| 2450 | const char **sh_cmds;
|
|---|
| 2451 |
|
|---|
| 2452 | #elif defined (__EMX__)
|
|---|
| 2453 | static const char *sh_chars_dos = "*?[];|<>%^&()";
|
|---|
| 2454 | static const char *sh_cmds_dos[] =
|
|---|
| 2455 | { "break", "call", "cd", "chcp", "chdir", "cls", "copy", "ctty", "date",
|
|---|
| 2456 | "del", "dir", "echo", "erase", "exit", "for", "goto", "if", "md",
|
|---|
| 2457 | "mkdir", "path", "pause", "prompt", "rd", "rmdir", "rem", "ren",
|
|---|
| 2458 | "rename", "set", "shift", "time", "type", "ver", "verify", "vol", ":",
|
|---|
| 2459 | 0 };
|
|---|
| 2460 |
|
|---|
| 2461 | static const char *sh_chars_os2 = "*?[];|<>%^()\"'&";
|
|---|
| 2462 | static const char *sh_cmds_os2[] =
|
|---|
| 2463 | { "call", "cd", "chcp", "chdir", "cls", "copy", "date", "del", "detach",
|
|---|
| 2464 | "dir", "echo", "endlocal", "erase", "exit", "for", "goto", "if", "keys",
|
|---|
| 2465 | "md", "mkdir", "move", "path", "pause", "prompt", "rd", "rem", "ren",
|
|---|
| 2466 | "rename", "rmdir", "set", "setlocal", "shift", "start", "time", "type",
|
|---|
| 2467 | "ver", "verify", "vol", ":", 0 };
|
|---|
| 2468 |
|
|---|
| 2469 | static const char *sh_chars_sh = "#;\"*?[]&|<>(){}$`^~'";
|
|---|
| 2470 | static const char *sh_cmds_sh[] =
|
|---|
| 2471 | { "echo", "cd", "eval", "exec", "exit", "login", "logout", "set", "umask",
|
|---|
| 2472 | "wait", "while", "for", "case", "if", ":", ".", "break", "continue",
|
|---|
| 2473 | "export", "read", "readonly", "shift", "times", "trap", "switch",
|
|---|
| 2474 | "unset", 0 };
|
|---|
| 2475 |
|
|---|
| 2476 | const char *sh_chars;
|
|---|
| 2477 | const char **sh_cmds;
|
|---|
| 2478 |
|
|---|
| 2479 | #elif defined (_AMIGA)
|
|---|
| 2480 | static const char *sh_chars = "#;\"|<>()?*$`";
|
|---|
| 2481 | static const char *sh_cmds[] =
|
|---|
| 2482 | { "cd", "eval", "if", "delete", "echo", "copy", "rename", "set", "setenv",
|
|---|
| 2483 | "date", "makedir", "skip", "else", "endif", "path", "prompt", "unset",
|
|---|
| 2484 | "unsetenv", "version", 0 };
|
|---|
| 2485 |
|
|---|
| 2486 | #elif defined (WINDOWS32)
|
|---|
| 2487 | /* We used to have a double quote (") in sh_chars_dos[] below, but
|
|---|
| 2488 | that caused any command line with quoted file names be run
|
|---|
| 2489 | through a temporary batch file, which introduces command-line
|
|---|
| 2490 | limit of 4K charcaters imposed by cmd.exe. Since CreateProcess
|
|---|
| 2491 | can handle quoted file names just fine, removing the quote lifts
|
|---|
| 2492 | the limit from a very frequent use case, because using quoted
|
|---|
| 2493 | file names is commonplace on MS-Windows. */
|
|---|
| 2494 | static const char *sh_chars_dos = "|&<>";
|
|---|
| 2495 | static const char *sh_cmds_dos[] =
|
|---|
| 2496 | { "assoc", "break", "call", "cd", "chcp", "chdir", "cls", "color", "copy",
|
|---|
| 2497 | "ctty", "date", "del", "dir", "echo", "echo.", "endlocal", "erase",
|
|---|
| 2498 | "exit", "for", "ftype", "goto", "if", "if", "md", "mkdir", "move",
|
|---|
| 2499 | "path", "pause", "prompt", "rd", "rem", "ren", "rename", "rmdir",
|
|---|
| 2500 | "set", "setlocal", "shift", "time", "title", "type", "ver", "verify",
|
|---|
| 2501 | "vol", ":", 0 };
|
|---|
| 2502 |
|
|---|
| 2503 | static const char *sh_chars_sh = "#;\"*?[]&|<>(){}$`^";
|
|---|
| 2504 | static const char *sh_cmds_sh[] =
|
|---|
| 2505 | { "cd", "eval", "exec", "exit", "login", "logout", "set", "umask", "wait",
|
|---|
| 2506 | "while", "for", "case", "if", ":", ".", "break", "continue", "export",
|
|---|
| 2507 | "read", "readonly", "shift", "times", "trap", "switch", "test",
|
|---|
| 2508 | #ifdef BATCH_MODE_ONLY_SHELL
|
|---|
| 2509 | "echo",
|
|---|
| 2510 | #endif
|
|---|
| 2511 | 0 };
|
|---|
| 2512 |
|
|---|
| 2513 | const char *sh_chars;
|
|---|
| 2514 | const char **sh_cmds;
|
|---|
| 2515 | #elif defined(__riscos__)
|
|---|
| 2516 | static const char *sh_chars = "";
|
|---|
| 2517 | static const char *sh_cmds[] = { 0 };
|
|---|
| 2518 | #else /* must be UNIX-ish */
|
|---|
| 2519 | static const char *sh_chars = "#;\"*?[]&|<>(){}$`^~!";
|
|---|
| 2520 | static const char *sh_cmds[] =
|
|---|
| 2521 | { ".", ":", "break", "case", "cd", "continue", "eval", "exec", "exit",
|
|---|
| 2522 | "export", "for", "if", "login", "logout", "read", "readonly", "set",
|
|---|
| 2523 | "shift", "switch", "test", "times", "trap", "ulimit", "umask", "unset",
|
|---|
| 2524 | "wait", "while", 0 };
|
|---|
| 2525 |
|
|---|
| 2526 | # ifdef HAVE_DOS_PATHS
|
|---|
| 2527 | /* This is required if the MSYS/Cygwin ports (which do not define
|
|---|
| 2528 | WINDOWS32) are compiled with HAVE_DOS_PATHS defined, which uses
|
|---|
| 2529 | sh_chars_sh directly (see below). The value must be identical
|
|---|
| 2530 | to that of sh_chars immediately above. */
|
|---|
| 2531 | static const char *sh_chars_sh = "#;\"*?[]&|<>(){}$`^~!";
|
|---|
| 2532 | # endif /* HAVE_DOS_PATHS */
|
|---|
| 2533 | #endif
|
|---|
| 2534 | int i;
|
|---|
| 2535 | char *p;
|
|---|
| 2536 | #ifndef NDEBUG
|
|---|
| 2537 | char *end;
|
|---|
| 2538 | #endif
|
|---|
| 2539 | char *ap;
|
|---|
| 2540 | const char *cap;
|
|---|
| 2541 | const char *cp;
|
|---|
| 2542 | int instring, word_has_equals, seen_nonequals, last_argument_was_empty;
|
|---|
| 2543 | char **new_argv = 0;
|
|---|
| 2544 | char *argstr = 0;
|
|---|
| 2545 | #ifdef WINDOWS32
|
|---|
| 2546 | int slow_flag = 0;
|
|---|
| 2547 |
|
|---|
| 2548 | if (!unixy_shell)
|
|---|
| 2549 | {
|
|---|
| 2550 | sh_cmds = sh_cmds_dos;
|
|---|
| 2551 | sh_chars = sh_chars_dos;
|
|---|
| 2552 | }
|
|---|
| 2553 | else
|
|---|
| 2554 | {
|
|---|
| 2555 | sh_cmds = sh_cmds_sh;
|
|---|
| 2556 | sh_chars = sh_chars_sh;
|
|---|
| 2557 | }
|
|---|
| 2558 | #endif /* WINDOWS32 */
|
|---|
| 2559 |
|
|---|
| 2560 | if (restp != NULL)
|
|---|
| 2561 | *restp = NULL;
|
|---|
| 2562 |
|
|---|
| 2563 | /* Make sure not to bother processing an empty line but stop at newline. */
|
|---|
| 2564 | while (ISBLANK (*line))
|
|---|
| 2565 | ++line;
|
|---|
| 2566 | if (*line == '\0')
|
|---|
| 2567 | return 0;
|
|---|
| 2568 |
|
|---|
| 2569 | if (shellflags == 0)
|
|---|
| 2570 | shellflags = posix_pedantic ? "-ec" : "-c";
|
|---|
| 2571 |
|
|---|
| 2572 | /* See if it is safe to parse commands internally. */
|
|---|
| 2573 | if (shell == 0)
|
|---|
| 2574 | shell = default_shell;
|
|---|
| 2575 | #ifdef WINDOWS32
|
|---|
| 2576 | else if (strcmp (shell, default_shell))
|
|---|
| 2577 | {
|
|---|
| 2578 | char *s1 = _fullpath (NULL, shell, 0);
|
|---|
| 2579 | char *s2 = _fullpath (NULL, default_shell, 0);
|
|---|
| 2580 |
|
|---|
| 2581 | slow_flag = strcmp ((s1 ? s1 : ""), (s2 ? s2 : ""));
|
|---|
| 2582 |
|
|---|
| 2583 | free (s1);
|
|---|
| 2584 | free (s2);
|
|---|
| 2585 | }
|
|---|
| 2586 | if (slow_flag)
|
|---|
| 2587 | goto slow;
|
|---|
| 2588 | #else /* not WINDOWS32 */
|
|---|
| 2589 | #if defined (__MSDOS__) || defined (__EMX__)
|
|---|
| 2590 | else if (strcasecmp (shell, default_shell))
|
|---|
| 2591 | {
|
|---|
| 2592 | extern int _is_unixy_shell (const char *_path);
|
|---|
| 2593 |
|
|---|
| 2594 | DB (DB_BASIC, (_("$SHELL changed (was '%s', now '%s')\n"),
|
|---|
| 2595 | default_shell, shell));
|
|---|
| 2596 | unixy_shell = _is_unixy_shell (shell);
|
|---|
| 2597 | /* we must allocate a copy of shell: construct_command_argv() will free
|
|---|
| 2598 | * shell after this function returns. */
|
|---|
| 2599 | default_shell = xstrdup (shell);
|
|---|
| 2600 | }
|
|---|
| 2601 | if (unixy_shell)
|
|---|
| 2602 | {
|
|---|
| 2603 | sh_chars = sh_chars_sh;
|
|---|
| 2604 | sh_cmds = sh_cmds_sh;
|
|---|
| 2605 | }
|
|---|
| 2606 | else
|
|---|
| 2607 | {
|
|---|
| 2608 | sh_chars = sh_chars_dos;
|
|---|
| 2609 | sh_cmds = sh_cmds_dos;
|
|---|
| 2610 | # ifdef __EMX__
|
|---|
| 2611 | if (_osmode == OS2_MODE)
|
|---|
| 2612 | {
|
|---|
| 2613 | sh_chars = sh_chars_os2;
|
|---|
| 2614 | sh_cmds = sh_cmds_os2;
|
|---|
| 2615 | }
|
|---|
| 2616 | # endif
|
|---|
| 2617 | }
|
|---|
| 2618 | #else /* !__MSDOS__ */
|
|---|
| 2619 | else if (strcmp (shell, default_shell))
|
|---|
| 2620 | goto slow;
|
|---|
| 2621 | #endif /* !__MSDOS__ && !__EMX__ */
|
|---|
| 2622 | #endif /* not WINDOWS32 */
|
|---|
| 2623 |
|
|---|
| 2624 | if (ifs)
|
|---|
| 2625 | for (cap = ifs; *cap != '\0'; ++cap)
|
|---|
| 2626 | if (*cap != ' ' && *cap != '\t' && *cap != '\n')
|
|---|
| 2627 | goto slow;
|
|---|
| 2628 |
|
|---|
| 2629 | if (shellflags)
|
|---|
| 2630 | if (shellflags[0] != '-'
|
|---|
| 2631 | || ((shellflags[1] != 'c' || shellflags[2] != '\0')
|
|---|
| 2632 | && (shellflags[1] != 'e' || shellflags[2] != 'c' || shellflags[3] != '\0')))
|
|---|
| 2633 | goto slow;
|
|---|
| 2634 |
|
|---|
| 2635 | i = strlen (line) + 1;
|
|---|
| 2636 |
|
|---|
| 2637 | /* More than 1 arg per character is impossible. */
|
|---|
| 2638 | new_argv = xmalloc (i * sizeof (char *));
|
|---|
| 2639 |
|
|---|
| 2640 | /* All the args can fit in a buffer as big as LINE is. */
|
|---|
| 2641 | ap = new_argv[0] = argstr = xmalloc (i);
|
|---|
| 2642 | #ifndef NDEBUG
|
|---|
| 2643 | end = ap + i;
|
|---|
| 2644 | #endif
|
|---|
| 2645 |
|
|---|
| 2646 | /* I is how many complete arguments have been found. */
|
|---|
| 2647 | i = 0;
|
|---|
| 2648 | instring = word_has_equals = seen_nonequals = last_argument_was_empty = 0;
|
|---|
| 2649 | for (p = line; *p != '\0'; ++p)
|
|---|
| 2650 | {
|
|---|
| 2651 | assert (ap <= end);
|
|---|
| 2652 |
|
|---|
| 2653 | if (instring)
|
|---|
| 2654 | {
|
|---|
| 2655 | /* Inside a string, just copy any char except a closing quote
|
|---|
| 2656 | or a backslash-newline combination. */
|
|---|
| 2657 | if (*p == instring)
|
|---|
| 2658 | {
|
|---|
| 2659 | instring = 0;
|
|---|
| 2660 | if (ap == new_argv[0] || *(ap-1) == '\0')
|
|---|
| 2661 | last_argument_was_empty = 1;
|
|---|
| 2662 | }
|
|---|
| 2663 | else if (*p == '\\' && p[1] == '\n')
|
|---|
| 2664 | {
|
|---|
| 2665 | /* Backslash-newline is handled differently depending on what
|
|---|
| 2666 | kind of string we're in: inside single-quoted strings you
|
|---|
| 2667 | keep them; in double-quoted strings they disappear. For
|
|---|
| 2668 | DOS/Windows/OS2, if we don't have a POSIX shell, we keep the
|
|---|
| 2669 | pre-POSIX behavior of removing the backslash-newline. */
|
|---|
| 2670 | if (instring == '"'
|
|---|
| 2671 | #if defined (__MSDOS__) || defined (__EMX__) || defined (WINDOWS32)
|
|---|
| 2672 | || !unixy_shell
|
|---|
| 2673 | #endif
|
|---|
| 2674 | )
|
|---|
| 2675 | ++p;
|
|---|
| 2676 | else
|
|---|
| 2677 | {
|
|---|
| 2678 | *(ap++) = *(p++);
|
|---|
| 2679 | *(ap++) = *p;
|
|---|
| 2680 | }
|
|---|
| 2681 | }
|
|---|
| 2682 | else if (*p == '\n' && restp != NULL)
|
|---|
| 2683 | {
|
|---|
| 2684 | /* End of the command line. */
|
|---|
| 2685 | *restp = p;
|
|---|
| 2686 | goto end_of_line;
|
|---|
| 2687 | }
|
|---|
| 2688 | /* Backslash, $, and ` are special inside double quotes.
|
|---|
| 2689 | If we see any of those, punt.
|
|---|
| 2690 | But on MSDOS, if we use COMMAND.COM, double and single
|
|---|
| 2691 | quotes have the same effect. */
|
|---|
| 2692 | else if (instring == '"' && strchr ("\\$`", *p) != 0 && unixy_shell)
|
|---|
| 2693 | goto slow;
|
|---|
| 2694 | #ifdef WINDOWS32
|
|---|
| 2695 | /* Quoted wildcard characters must be passed quoted to the
|
|---|
| 2696 | command, so give up the fast route. */
|
|---|
| 2697 | else if (instring == '"' && strchr ("*?", *p) != 0 && !unixy_shell)
|
|---|
| 2698 | goto slow;
|
|---|
| 2699 | else if (instring == '"' && strncmp (p, "\\\"", 2) == 0)
|
|---|
| 2700 | *ap++ = *++p;
|
|---|
| 2701 | #endif
|
|---|
| 2702 | else
|
|---|
| 2703 | *ap++ = *p;
|
|---|
| 2704 | }
|
|---|
| 2705 | else if (strchr (sh_chars, *p) != 0)
|
|---|
| 2706 | /* Not inside a string, but it's a special char. */
|
|---|
| 2707 | goto slow;
|
|---|
| 2708 | else if (one_shell && *p == '\n')
|
|---|
| 2709 | /* In .ONESHELL mode \n is a separator like ; or && */
|
|---|
| 2710 | goto slow;
|
|---|
| 2711 | #ifdef __MSDOS__
|
|---|
| 2712 | else if (*p == '.' && p[1] == '.' && p[2] == '.' && p[3] != '.')
|
|---|
| 2713 | /* '...' is a wildcard in DJGPP. */
|
|---|
| 2714 | goto slow;
|
|---|
| 2715 | #endif
|
|---|
| 2716 | else
|
|---|
| 2717 | /* Not a special char. */
|
|---|
| 2718 | switch (*p)
|
|---|
| 2719 | {
|
|---|
| 2720 | case '=':
|
|---|
| 2721 | /* Equals is a special character in leading words before the
|
|---|
| 2722 | first word with no equals sign in it. This is not the case
|
|---|
| 2723 | with sh -k, but we never get here when using nonstandard
|
|---|
| 2724 | shell flags. */
|
|---|
| 2725 | if (! seen_nonequals && unixy_shell)
|
|---|
| 2726 | goto slow;
|
|---|
| 2727 | word_has_equals = 1;
|
|---|
| 2728 | *ap++ = '=';
|
|---|
| 2729 | break;
|
|---|
| 2730 |
|
|---|
| 2731 | case '\\':
|
|---|
| 2732 | /* Backslash-newline has special case handling, ref POSIX.
|
|---|
| 2733 | We're in the fastpath, so emulate what the shell would do. */
|
|---|
| 2734 | if (p[1] == '\n')
|
|---|
| 2735 | {
|
|---|
| 2736 | /* Throw out the backslash and newline. */
|
|---|
| 2737 | ++p;
|
|---|
| 2738 |
|
|---|
| 2739 | /* At the beginning of the argument, skip any whitespace other
|
|---|
| 2740 | than newline before the start of the next word. */
|
|---|
| 2741 | if (ap == new_argv[i])
|
|---|
| 2742 | while (ISBLANK (p[1]))
|
|---|
| 2743 | ++p;
|
|---|
| 2744 | }
|
|---|
| 2745 | #ifdef WINDOWS32
|
|---|
| 2746 | /* Backslash before whitespace is not special if our shell
|
|---|
| 2747 | is not Unixy. */
|
|---|
| 2748 | else if (ISSPACE (p[1]) && !unixy_shell)
|
|---|
| 2749 | {
|
|---|
| 2750 | *ap++ = *p;
|
|---|
| 2751 | break;
|
|---|
| 2752 | }
|
|---|
| 2753 | #endif
|
|---|
| 2754 | else if (p[1] != '\0')
|
|---|
| 2755 | {
|
|---|
| 2756 | #ifdef HAVE_DOS_PATHS
|
|---|
| 2757 | /* Only remove backslashes before characters special to Unixy
|
|---|
| 2758 | shells. All other backslashes are copied verbatim, since
|
|---|
| 2759 | they are probably DOS-style directory separators. This
|
|---|
| 2760 | still leaves a small window for problems, but at least it
|
|---|
| 2761 | should work for the vast majority of naive users. */
|
|---|
| 2762 |
|
|---|
| 2763 | #ifdef __MSDOS__
|
|---|
| 2764 | /* A dot is only special as part of the "..."
|
|---|
| 2765 | wildcard. */
|
|---|
| 2766 | if (strneq (p + 1, ".\\.\\.", 5))
|
|---|
| 2767 | {
|
|---|
| 2768 | *ap++ = '.';
|
|---|
| 2769 | *ap++ = '.';
|
|---|
| 2770 | p += 4;
|
|---|
| 2771 | }
|
|---|
| 2772 | else
|
|---|
| 2773 | #endif
|
|---|
| 2774 | if (p[1] != '\\' && p[1] != '\''
|
|---|
| 2775 | && !ISSPACE (p[1])
|
|---|
| 2776 | && strchr (sh_chars_sh, p[1]) == 0)
|
|---|
| 2777 | /* back up one notch, to copy the backslash */
|
|---|
| 2778 | --p;
|
|---|
| 2779 | #endif /* HAVE_DOS_PATHS */
|
|---|
| 2780 |
|
|---|
| 2781 | /* Copy and skip the following char. */
|
|---|
| 2782 | *ap++ = *++p;
|
|---|
| 2783 | }
|
|---|
| 2784 | break;
|
|---|
| 2785 |
|
|---|
| 2786 | case '\'':
|
|---|
| 2787 | case '"':
|
|---|
| 2788 | instring = *p;
|
|---|
| 2789 | break;
|
|---|
| 2790 |
|
|---|
| 2791 | case '\n':
|
|---|
| 2792 | if (restp != NULL)
|
|---|
| 2793 | {
|
|---|
| 2794 | /* End of the command line. */
|
|---|
| 2795 | *restp = p;
|
|---|
| 2796 | goto end_of_line;
|
|---|
| 2797 | }
|
|---|
| 2798 | else
|
|---|
| 2799 | /* Newlines are not special. */
|
|---|
| 2800 | *ap++ = '\n';
|
|---|
| 2801 | break;
|
|---|
| 2802 |
|
|---|
| 2803 | case ' ':
|
|---|
| 2804 | case '\t':
|
|---|
| 2805 | /* We have the end of an argument.
|
|---|
| 2806 | Terminate the text of the argument. */
|
|---|
| 2807 | *ap++ = '\0';
|
|---|
| 2808 | new_argv[++i] = ap;
|
|---|
| 2809 | last_argument_was_empty = 0;
|
|---|
| 2810 |
|
|---|
| 2811 | /* Update SEEN_NONEQUALS, which tells us if every word
|
|---|
| 2812 | heretofore has contained an '='. */
|
|---|
| 2813 | seen_nonequals |= ! word_has_equals;
|
|---|
| 2814 | if (word_has_equals && ! seen_nonequals)
|
|---|
| 2815 | /* An '=' in a word before the first
|
|---|
| 2816 | word without one is magical. */
|
|---|
| 2817 | goto slow;
|
|---|
| 2818 | word_has_equals = 0; /* Prepare for the next word. */
|
|---|
| 2819 |
|
|---|
| 2820 | /* If this argument is the command name,
|
|---|
| 2821 | see if it is a built-in shell command.
|
|---|
| 2822 | If so, have the shell handle it. */
|
|---|
| 2823 | if (i == 1)
|
|---|
| 2824 | {
|
|---|
| 2825 | register int j;
|
|---|
| 2826 | for (j = 0; sh_cmds[j] != 0; ++j)
|
|---|
| 2827 | {
|
|---|
| 2828 | if (streq (sh_cmds[j], new_argv[0]))
|
|---|
| 2829 | goto slow;
|
|---|
| 2830 | #if defined(__EMX__) || defined(WINDOWS32)
|
|---|
| 2831 | /* Non-Unix shells are case insensitive. */
|
|---|
| 2832 | if (!unixy_shell
|
|---|
| 2833 | && strcasecmp (sh_cmds[j], new_argv[0]) == 0)
|
|---|
| 2834 | goto slow;
|
|---|
| 2835 | #endif
|
|---|
| 2836 | }
|
|---|
| 2837 | }
|
|---|
| 2838 |
|
|---|
| 2839 | /* Skip whitespace chars, but not newlines. */
|
|---|
| 2840 | while (ISBLANK (p[1]))
|
|---|
| 2841 | ++p;
|
|---|
| 2842 | break;
|
|---|
| 2843 |
|
|---|
| 2844 | default:
|
|---|
| 2845 | *ap++ = *p;
|
|---|
| 2846 | break;
|
|---|
| 2847 | }
|
|---|
| 2848 | }
|
|---|
| 2849 | end_of_line:
|
|---|
| 2850 |
|
|---|
| 2851 | if (instring)
|
|---|
| 2852 | /* Let the shell deal with an unterminated quote. */
|
|---|
| 2853 | goto slow;
|
|---|
| 2854 |
|
|---|
| 2855 | /* Terminate the last argument and the argument list. */
|
|---|
| 2856 |
|
|---|
| 2857 | *ap = '\0';
|
|---|
| 2858 | if (new_argv[i][0] != '\0' || last_argument_was_empty)
|
|---|
| 2859 | ++i;
|
|---|
| 2860 | new_argv[i] = 0;
|
|---|
| 2861 |
|
|---|
| 2862 | if (i == 1)
|
|---|
| 2863 | {
|
|---|
| 2864 | register int j;
|
|---|
| 2865 | for (j = 0; sh_cmds[j] != 0; ++j)
|
|---|
| 2866 | if (streq (sh_cmds[j], new_argv[0]))
|
|---|
| 2867 | goto slow;
|
|---|
| 2868 | }
|
|---|
| 2869 |
|
|---|
| 2870 | if (new_argv[0] == 0)
|
|---|
| 2871 | {
|
|---|
| 2872 | /* Line was empty. */
|
|---|
| 2873 | free (argstr);
|
|---|
| 2874 | free (new_argv);
|
|---|
| 2875 | return 0;
|
|---|
| 2876 | }
|
|---|
| 2877 |
|
|---|
| 2878 | return new_argv;
|
|---|
| 2879 |
|
|---|
| 2880 | slow:;
|
|---|
| 2881 | /* We must use the shell. */
|
|---|
| 2882 |
|
|---|
| 2883 | if (new_argv != 0)
|
|---|
| 2884 | {
|
|---|
| 2885 | /* Free the old argument list we were working on. */
|
|---|
| 2886 | free (argstr);
|
|---|
| 2887 | free (new_argv);
|
|---|
| 2888 | }
|
|---|
| 2889 |
|
|---|
| 2890 | #ifdef __MSDOS__
|
|---|
| 2891 | execute_by_shell = 1; /* actually, call 'system' if shell isn't unixy */
|
|---|
| 2892 | #endif
|
|---|
| 2893 |
|
|---|
| 2894 | #ifdef _AMIGA
|
|---|
| 2895 | {
|
|---|
| 2896 | char *ptr;
|
|---|
| 2897 | char *buffer;
|
|---|
| 2898 | char *dptr;
|
|---|
| 2899 |
|
|---|
| 2900 | buffer = xmalloc (strlen (line)+1);
|
|---|
| 2901 |
|
|---|
| 2902 | ptr = line;
|
|---|
| 2903 | for (dptr=buffer; *ptr; )
|
|---|
| 2904 | {
|
|---|
| 2905 | if (*ptr == '\\' && ptr[1] == '\n')
|
|---|
| 2906 | ptr += 2;
|
|---|
| 2907 | else if (*ptr == '@') /* Kludge: multiline commands */
|
|---|
| 2908 | {
|
|---|
| 2909 | ptr += 2;
|
|---|
| 2910 | *dptr++ = '\n';
|
|---|
| 2911 | }
|
|---|
| 2912 | else
|
|---|
| 2913 | *dptr++ = *ptr++;
|
|---|
| 2914 | }
|
|---|
| 2915 | *dptr = 0;
|
|---|
| 2916 |
|
|---|
| 2917 | new_argv = xmalloc (2 * sizeof (char *));
|
|---|
| 2918 | new_argv[0] = buffer;
|
|---|
| 2919 | new_argv[1] = 0;
|
|---|
| 2920 | }
|
|---|
| 2921 | #else /* Not Amiga */
|
|---|
| 2922 | #ifdef WINDOWS32
|
|---|
| 2923 | /*
|
|---|
| 2924 | * Not eating this whitespace caused things like
|
|---|
| 2925 | *
|
|---|
| 2926 | * sh -c "\n"
|
|---|
| 2927 | *
|
|---|
| 2928 | * which gave the shell fits. I think we have to eat
|
|---|
| 2929 | * whitespace here, but this code should be considered
|
|---|
| 2930 | * suspicious if things start failing....
|
|---|
| 2931 | */
|
|---|
| 2932 |
|
|---|
| 2933 | /* Make sure not to bother processing an empty line. */
|
|---|
| 2934 | NEXT_TOKEN (line);
|
|---|
| 2935 | if (*line == '\0')
|
|---|
| 2936 | return 0;
|
|---|
| 2937 | #endif /* WINDOWS32 */
|
|---|
| 2938 |
|
|---|
| 2939 | {
|
|---|
| 2940 | /* SHELL may be a multi-word command. Construct a command line
|
|---|
| 2941 | "$(SHELL) $(.SHELLFLAGS) LINE", with all special chars in LINE escaped.
|
|---|
| 2942 | Then recurse, expanding this command line to get the final
|
|---|
| 2943 | argument list. */
|
|---|
| 2944 |
|
|---|
| 2945 | char *new_line;
|
|---|
| 2946 | unsigned int shell_len = strlen (shell);
|
|---|
| 2947 | unsigned int line_len = strlen (line);
|
|---|
| 2948 | unsigned int sflags_len = shellflags ? strlen (shellflags) : 0;
|
|---|
| 2949 | #ifdef WINDOWS32
|
|---|
| 2950 | char *command_ptr = NULL; /* used for batch_mode_shell mode */
|
|---|
| 2951 | #endif
|
|---|
| 2952 |
|
|---|
| 2953 | # ifdef __EMX__ /* is this necessary? */
|
|---|
| 2954 | if (!unixy_shell && shellflags)
|
|---|
| 2955 | shellflags[0] = '/'; /* "/c" */
|
|---|
| 2956 | # endif
|
|---|
| 2957 |
|
|---|
| 2958 | /* In .ONESHELL mode we are allowed to throw the entire current
|
|---|
| 2959 | recipe string at a single shell and trust that the user
|
|---|
| 2960 | has configured the shell and shell flags, and formatted
|
|---|
| 2961 | the string, appropriately. */
|
|---|
| 2962 | if (one_shell)
|
|---|
| 2963 | {
|
|---|
| 2964 | /* If the shell is Bourne compatible, we must remove and ignore
|
|---|
| 2965 | interior special chars [@+-] because they're meaningless to
|
|---|
| 2966 | the shell itself. If, however, we're in .ONESHELL mode and
|
|---|
| 2967 | have changed SHELL to something non-standard, we should
|
|---|
| 2968 | leave those alone because they could be part of the
|
|---|
| 2969 | script. In this case we must also leave in place
|
|---|
| 2970 | any leading [@+-] for the same reason. */
|
|---|
| 2971 |
|
|---|
| 2972 | /* Remove and ignore interior prefix chars [@+-] because they're
|
|---|
| 2973 | meaningless given a single shell. */
|
|---|
| 2974 | #if defined __MSDOS__ || defined (__EMX__)
|
|---|
| 2975 | if (unixy_shell) /* the test is complicated and we already did it */
|
|---|
| 2976 | #else
|
|---|
| 2977 | if (is_bourne_compatible_shell (shell)
|
|---|
| 2978 | #ifdef WINDOWS32
|
|---|
| 2979 | /* If we didn't find any sh.exe, don't behave is if we did! */
|
|---|
| 2980 | && !no_default_sh_exe
|
|---|
| 2981 | #endif
|
|---|
| 2982 | )
|
|---|
| 2983 | #endif
|
|---|
| 2984 | {
|
|---|
| 2985 | const char *f = line;
|
|---|
| 2986 | char *t = line;
|
|---|
| 2987 |
|
|---|
| 2988 | /* Copy the recipe, removing and ignoring interior prefix chars
|
|---|
| 2989 | [@+-]: they're meaningless in .ONESHELL mode. */
|
|---|
| 2990 | while (f[0] != '\0')
|
|---|
| 2991 | {
|
|---|
| 2992 | int esc = 0;
|
|---|
| 2993 |
|
|---|
| 2994 | /* This is the start of a new recipe line. Skip whitespace
|
|---|
| 2995 | and prefix characters but not newlines. */
|
|---|
| 2996 | while (ISBLANK (*f) || *f == '-' || *f == '@' || *f == '+')
|
|---|
| 2997 | ++f;
|
|---|
| 2998 |
|
|---|
| 2999 | /* Copy until we get to the next logical recipe line. */
|
|---|
| 3000 | while (*f != '\0')
|
|---|
| 3001 | {
|
|---|
| 3002 | *(t++) = *(f++);
|
|---|
| 3003 | if (f[-1] == '\\')
|
|---|
| 3004 | esc = !esc;
|
|---|
| 3005 | else
|
|---|
| 3006 | {
|
|---|
| 3007 | /* On unescaped newline, we're done with this line. */
|
|---|
| 3008 | if (f[-1] == '\n' && ! esc)
|
|---|
| 3009 | break;
|
|---|
| 3010 |
|
|---|
| 3011 | /* Something else: reset the escape sequence. */
|
|---|
| 3012 | esc = 0;
|
|---|
| 3013 | }
|
|---|
| 3014 | }
|
|---|
| 3015 | }
|
|---|
| 3016 | *t = '\0';
|
|---|
| 3017 | }
|
|---|
| 3018 | #ifdef WINDOWS32
|
|---|
| 3019 | else /* non-Posix shell (cmd.exe etc.) */
|
|---|
| 3020 | {
|
|---|
| 3021 | const char *f = line;
|
|---|
| 3022 | char *t = line;
|
|---|
| 3023 | char *tstart = t;
|
|---|
| 3024 | int temp_fd;
|
|---|
| 3025 | FILE* batch = NULL;
|
|---|
| 3026 | int id = GetCurrentProcessId ();
|
|---|
| 3027 | PATH_VAR(fbuf);
|
|---|
| 3028 |
|
|---|
| 3029 | /* Generate a file name for the temporary batch file. */
|
|---|
| 3030 | sprintf (fbuf, "make%d", id);
|
|---|
| 3031 | *batch_filename = create_batch_file (fbuf, 0, &temp_fd);
|
|---|
| 3032 | DB (DB_JOBS, (_("Creating temporary batch file %s\n"),
|
|---|
| 3033 | *batch_filename));
|
|---|
| 3034 |
|
|---|
| 3035 | /* Create a FILE object for the batch file, and write to it the
|
|---|
| 3036 | commands to be executed. Put the batch file in TEXT mode. */
|
|---|
| 3037 | _setmode (temp_fd, _O_TEXT);
|
|---|
| 3038 | batch = _fdopen (temp_fd, "wt");
|
|---|
| 3039 | fputs ("@echo off\n", batch);
|
|---|
| 3040 | DB (DB_JOBS, (_("Batch file contents:\n\t@echo off\n")));
|
|---|
| 3041 |
|
|---|
| 3042 | /* Copy the recipe, removing and ignoring interior prefix chars
|
|---|
| 3043 | [@+-]: they're meaningless in .ONESHELL mode. */
|
|---|
| 3044 | while (*f != '\0')
|
|---|
| 3045 | {
|
|---|
| 3046 | /* This is the start of a new recipe line. Skip whitespace
|
|---|
| 3047 | and prefix characters but not newlines. */
|
|---|
| 3048 | while (ISBLANK (*f) || *f == '-' || *f == '@' || *f == '+')
|
|---|
| 3049 | ++f;
|
|---|
| 3050 |
|
|---|
| 3051 | /* Copy until we get to the next logical recipe line. */
|
|---|
| 3052 | while (*f != '\0')
|
|---|
| 3053 | {
|
|---|
| 3054 | /* Remove the escaped newlines in the command, and the
|
|---|
| 3055 | blanks that follow them. Windows shells cannot handle
|
|---|
| 3056 | escaped newlines. */
|
|---|
| 3057 | if (*f == '\\' && f[1] == '\n')
|
|---|
| 3058 | {
|
|---|
| 3059 | f += 2;
|
|---|
| 3060 | while (ISBLANK (*f))
|
|---|
| 3061 | ++f;
|
|---|
| 3062 | }
|
|---|
| 3063 | *(t++) = *(f++);
|
|---|
| 3064 | /* On an unescaped newline, we're done with this
|
|---|
| 3065 | line. */
|
|---|
| 3066 | if (f[-1] == '\n')
|
|---|
| 3067 | break;
|
|---|
| 3068 | }
|
|---|
| 3069 | /* Write another line into the batch file. */
|
|---|
| 3070 | if (t > tstart)
|
|---|
| 3071 | {
|
|---|
| 3072 | char c = *t;
|
|---|
| 3073 | *t = '\0';
|
|---|
| 3074 | fputs (tstart, batch);
|
|---|
| 3075 | DB (DB_JOBS, ("\t%s", tstart));
|
|---|
| 3076 | tstart = t;
|
|---|
| 3077 | *t = c;
|
|---|
| 3078 | }
|
|---|
| 3079 | }
|
|---|
| 3080 | DB (DB_JOBS, ("\n"));
|
|---|
| 3081 | fclose (batch);
|
|---|
| 3082 |
|
|---|
| 3083 | /* Create an argv list for the shell command line that
|
|---|
| 3084 | will run the batch file. */
|
|---|
| 3085 | new_argv = xmalloc (2 * sizeof (char *));
|
|---|
| 3086 | new_argv[0] = xstrdup (*batch_filename);
|
|---|
| 3087 | new_argv[1] = NULL;
|
|---|
| 3088 | return new_argv;
|
|---|
| 3089 | }
|
|---|
| 3090 | #endif /* WINDOWS32 */
|
|---|
| 3091 | /* Create an argv list for the shell command line. */
|
|---|
| 3092 | {
|
|---|
| 3093 | int n = 0;
|
|---|
| 3094 |
|
|---|
| 3095 | new_argv = xmalloc ((4 + sflags_len/2) * sizeof (char *));
|
|---|
| 3096 | new_argv[n++] = xstrdup (shell);
|
|---|
| 3097 |
|
|---|
| 3098 | /* Chop up the shellflags (if any) and assign them. */
|
|---|
| 3099 | if (! shellflags)
|
|---|
| 3100 | new_argv[n++] = xstrdup ("");
|
|---|
| 3101 | else
|
|---|
| 3102 | {
|
|---|
| 3103 | const char *s = shellflags;
|
|---|
| 3104 | char *t;
|
|---|
| 3105 | unsigned int len;
|
|---|
| 3106 | while ((t = find_next_token (&s, &len)) != 0)
|
|---|
| 3107 | new_argv[n++] = xstrndup (t, len);
|
|---|
| 3108 | }
|
|---|
| 3109 |
|
|---|
| 3110 | /* Set the command to invoke. */
|
|---|
| 3111 | new_argv[n++] = line;
|
|---|
| 3112 | new_argv[n++] = NULL;
|
|---|
| 3113 | }
|
|---|
| 3114 | return new_argv;
|
|---|
| 3115 | }
|
|---|
| 3116 |
|
|---|
| 3117 | new_line = xmalloc ((shell_len*2) + 1 + sflags_len + 1
|
|---|
| 3118 | + (line_len*2) + 1);
|
|---|
| 3119 | ap = new_line;
|
|---|
| 3120 | /* Copy SHELL, escaping any characters special to the shell. If
|
|---|
| 3121 | we don't escape them, construct_command_argv_internal will
|
|---|
| 3122 | recursively call itself ad nauseam, or until stack overflow,
|
|---|
| 3123 | whichever happens first. */
|
|---|
| 3124 | for (cp = shell; *cp != '\0'; ++cp)
|
|---|
| 3125 | {
|
|---|
| 3126 | if (strchr (sh_chars, *cp) != 0)
|
|---|
| 3127 | *(ap++) = '\\';
|
|---|
| 3128 | *(ap++) = *cp;
|
|---|
| 3129 | }
|
|---|
| 3130 | *(ap++) = ' ';
|
|---|
| 3131 | if (shellflags)
|
|---|
| 3132 | memcpy (ap, shellflags, sflags_len);
|
|---|
| 3133 | ap += sflags_len;
|
|---|
| 3134 | *(ap++) = ' ';
|
|---|
| 3135 | #ifdef WINDOWS32
|
|---|
| 3136 | command_ptr = ap;
|
|---|
| 3137 | #endif
|
|---|
| 3138 | for (p = line; *p != '\0'; ++p)
|
|---|
| 3139 | {
|
|---|
| 3140 | if (restp != NULL && *p == '\n')
|
|---|
| 3141 | {
|
|---|
| 3142 | *restp = p;
|
|---|
| 3143 | break;
|
|---|
| 3144 | }
|
|---|
| 3145 | else if (*p == '\\' && p[1] == '\n')
|
|---|
| 3146 | {
|
|---|
| 3147 | /* POSIX says we keep the backslash-newline. If we don't have a
|
|---|
| 3148 | POSIX shell on DOS/Windows/OS2, mimic the pre-POSIX behavior
|
|---|
| 3149 | and remove the backslash/newline. */
|
|---|
| 3150 | #if defined (__MSDOS__) || defined (__EMX__) || defined (WINDOWS32)
|
|---|
| 3151 | # define PRESERVE_BSNL unixy_shell
|
|---|
| 3152 | #else
|
|---|
| 3153 | # define PRESERVE_BSNL 1
|
|---|
| 3154 | #endif
|
|---|
| 3155 | if (PRESERVE_BSNL)
|
|---|
| 3156 | {
|
|---|
| 3157 | *(ap++) = '\\';
|
|---|
| 3158 | /* Only non-batch execution needs another backslash,
|
|---|
| 3159 | because it will be passed through a recursive
|
|---|
| 3160 | invocation of this function. */
|
|---|
| 3161 | if (!batch_mode_shell)
|
|---|
| 3162 | *(ap++) = '\\';
|
|---|
| 3163 | *(ap++) = '\n';
|
|---|
| 3164 | }
|
|---|
| 3165 | ++p;
|
|---|
| 3166 | continue;
|
|---|
| 3167 | }
|
|---|
| 3168 |
|
|---|
| 3169 | /* DOS shells don't know about backslash-escaping. */
|
|---|
| 3170 | if (unixy_shell && !batch_mode_shell &&
|
|---|
| 3171 | (*p == '\\' || *p == '\'' || *p == '"'
|
|---|
| 3172 | || ISSPACE (*p)
|
|---|
| 3173 | || strchr (sh_chars, *p) != 0))
|
|---|
| 3174 | *ap++ = '\\';
|
|---|
| 3175 | #ifdef __MSDOS__
|
|---|
| 3176 | else if (unixy_shell && strneq (p, "...", 3))
|
|---|
| 3177 | {
|
|---|
| 3178 | /* The case of '...' wildcard again. */
|
|---|
| 3179 | strcpy (ap, "\\.\\.\\");
|
|---|
| 3180 | ap += 5;
|
|---|
| 3181 | p += 2;
|
|---|
| 3182 | }
|
|---|
| 3183 | #endif
|
|---|
| 3184 | *ap++ = *p;
|
|---|
| 3185 | }
|
|---|
| 3186 | if (ap == new_line + shell_len + sflags_len + 2)
|
|---|
| 3187 | {
|
|---|
| 3188 | /* Line was empty. */
|
|---|
| 3189 | free (new_line);
|
|---|
| 3190 | return 0;
|
|---|
| 3191 | }
|
|---|
| 3192 | *ap = '\0';
|
|---|
| 3193 |
|
|---|
| 3194 | #ifdef WINDOWS32
|
|---|
| 3195 | /* Some shells do not work well when invoked as 'sh -c xxx' to run a
|
|---|
| 3196 | command line (e.g. Cygnus GNUWIN32 sh.exe on WIN32 systems). In these
|
|---|
| 3197 | cases, run commands via a script file. */
|
|---|
| 3198 | if (just_print_flag && !(flags & COMMANDS_RECURSE))
|
|---|
| 3199 | {
|
|---|
| 3200 | /* Need to allocate new_argv, although it's unused, because
|
|---|
| 3201 | start_job_command will want to free it and its 0'th element. */
|
|---|
| 3202 | new_argv = xmalloc (2 * sizeof (char *));
|
|---|
| 3203 | new_argv[0] = xstrdup ("");
|
|---|
| 3204 | new_argv[1] = NULL;
|
|---|
| 3205 | }
|
|---|
| 3206 | else if ((no_default_sh_exe || batch_mode_shell) && batch_filename)
|
|---|
| 3207 | {
|
|---|
| 3208 | int temp_fd;
|
|---|
| 3209 | FILE* batch = NULL;
|
|---|
| 3210 | int id = GetCurrentProcessId ();
|
|---|
| 3211 | PATH_VAR (fbuf);
|
|---|
| 3212 |
|
|---|
| 3213 | /* create a file name */
|
|---|
| 3214 | sprintf (fbuf, "make%d", id);
|
|---|
| 3215 | *batch_filename = create_batch_file (fbuf, unixy_shell, &temp_fd);
|
|---|
| 3216 |
|
|---|
| 3217 | DB (DB_JOBS, (_("Creating temporary batch file %s\n"),
|
|---|
| 3218 | *batch_filename));
|
|---|
| 3219 |
|
|---|
| 3220 | /* Create a FILE object for the batch file, and write to it the
|
|---|
| 3221 | commands to be executed. Put the batch file in TEXT mode. */
|
|---|
| 3222 | _setmode (temp_fd, _O_TEXT);
|
|---|
| 3223 | batch = _fdopen (temp_fd, "wt");
|
|---|
| 3224 | if (!unixy_shell)
|
|---|
| 3225 | fputs ("@echo off\n", batch);
|
|---|
| 3226 | fputs (command_ptr, batch);
|
|---|
| 3227 | fputc ('\n', batch);
|
|---|
| 3228 | fclose (batch);
|
|---|
| 3229 | DB (DB_JOBS, (_("Batch file contents:%s\n\t%s\n"),
|
|---|
| 3230 | !unixy_shell ? "\n\t@echo off" : "", command_ptr));
|
|---|
| 3231 |
|
|---|
| 3232 | /* create argv */
|
|---|
| 3233 | new_argv = xmalloc (3 * sizeof (char *));
|
|---|
| 3234 | if (unixy_shell)
|
|---|
| 3235 | {
|
|---|
| 3236 | new_argv[0] = xstrdup (shell);
|
|---|
| 3237 | new_argv[1] = *batch_filename; /* only argv[0] gets freed later */
|
|---|
| 3238 | }
|
|---|
| 3239 | else
|
|---|
| 3240 | {
|
|---|
| 3241 | new_argv[0] = xstrdup (*batch_filename);
|
|---|
| 3242 | new_argv[1] = NULL;
|
|---|
| 3243 | }
|
|---|
| 3244 | new_argv[2] = NULL;
|
|---|
| 3245 | }
|
|---|
| 3246 | else
|
|---|
| 3247 | #endif /* WINDOWS32 */
|
|---|
| 3248 |
|
|---|
| 3249 | if (unixy_shell)
|
|---|
| 3250 | new_argv = construct_command_argv_internal (new_line, 0, 0, 0, 0,
|
|---|
| 3251 | flags, 0);
|
|---|
| 3252 |
|
|---|
| 3253 | #ifdef __EMX__
|
|---|
| 3254 | else if (!unixy_shell)
|
|---|
| 3255 | {
|
|---|
| 3256 | /* new_line is local, must not be freed therefore
|
|---|
| 3257 | We use line here instead of new_line because we run the shell
|
|---|
| 3258 | manually. */
|
|---|
| 3259 | size_t line_len = strlen (line);
|
|---|
| 3260 | char *p = new_line;
|
|---|
| 3261 | char *q = new_line;
|
|---|
| 3262 | memcpy (new_line, line, line_len + 1);
|
|---|
| 3263 | /* Replace all backslash-newline combination and also following tabs.
|
|---|
| 3264 | Important: stop at the first '\n' because that's what the loop above
|
|---|
| 3265 | did. The next line starting at restp[0] will be executed during the
|
|---|
| 3266 | next call of this function. */
|
|---|
| 3267 | while (*q != '\0' && *q != '\n')
|
|---|
| 3268 | {
|
|---|
| 3269 | if (q[0] == '\\' && q[1] == '\n')
|
|---|
| 3270 | q += 2; /* remove '\\' and '\n' */
|
|---|
| 3271 | else
|
|---|
| 3272 | *p++ = *q++;
|
|---|
| 3273 | }
|
|---|
| 3274 | *p = '\0';
|
|---|
| 3275 |
|
|---|
| 3276 | # ifndef NO_CMD_DEFAULT
|
|---|
| 3277 | if (strnicmp (new_line, "echo", 4) == 0
|
|---|
| 3278 | && (new_line[4] == ' ' || new_line[4] == '\t'))
|
|---|
| 3279 | {
|
|---|
| 3280 | /* the builtin echo command: handle it separately */
|
|---|
| 3281 | size_t echo_len = line_len - 5;
|
|---|
| 3282 | char *echo_line = new_line + 5;
|
|---|
| 3283 |
|
|---|
| 3284 | /* special case: echo 'x="y"'
|
|---|
| 3285 | cmd works this way: a string is printed as is, i.e., no quotes
|
|---|
| 3286 | are removed. But autoconf uses a command like echo 'x="y"' to
|
|---|
| 3287 | determine whether make works. autoconf expects the output x="y"
|
|---|
| 3288 | so we will do exactly that.
|
|---|
| 3289 | Note: if we do not allow cmd to be the default shell
|
|---|
| 3290 | we do not need this kind of voodoo */
|
|---|
| 3291 | if (echo_line[0] == '\''
|
|---|
| 3292 | && echo_line[echo_len - 1] == '\''
|
|---|
| 3293 | && strncmp (echo_line + 1, "ac_maketemp=",
|
|---|
| 3294 | strlen ("ac_maketemp=")) == 0)
|
|---|
| 3295 | {
|
|---|
| 3296 | /* remove the enclosing quotes */
|
|---|
| 3297 | memmove (echo_line, echo_line + 1, echo_len - 2);
|
|---|
| 3298 | echo_line[echo_len - 2] = '\0';
|
|---|
| 3299 | }
|
|---|
| 3300 | }
|
|---|
| 3301 | # endif
|
|---|
| 3302 |
|
|---|
| 3303 | {
|
|---|
| 3304 | /* Let the shell decide what to do. Put the command line into the
|
|---|
| 3305 | 2nd command line argument and hope for the best ;-) */
|
|---|
| 3306 | size_t sh_len = strlen (shell);
|
|---|
| 3307 |
|
|---|
| 3308 | /* exactly 3 arguments + NULL */
|
|---|
| 3309 | new_argv = xmalloc (4 * sizeof (char *));
|
|---|
| 3310 | /* Exactly strlen(shell) + strlen("/c") + strlen(line) + 3 times
|
|---|
| 3311 | the trailing '\0' */
|
|---|
| 3312 | new_argv[0] = xmalloc (sh_len + line_len + 5);
|
|---|
| 3313 | memcpy (new_argv[0], shell, sh_len + 1);
|
|---|
| 3314 | new_argv[1] = new_argv[0] + sh_len + 1;
|
|---|
| 3315 | memcpy (new_argv[1], "/c", 3);
|
|---|
| 3316 | new_argv[2] = new_argv[1] + 3;
|
|---|
| 3317 | memcpy (new_argv[2], new_line, line_len + 1);
|
|---|
| 3318 | new_argv[3] = NULL;
|
|---|
| 3319 | }
|
|---|
| 3320 | }
|
|---|
| 3321 | #elif defined(__MSDOS__)
|
|---|
| 3322 | else
|
|---|
| 3323 | {
|
|---|
| 3324 | /* With MSDOS shells, we must construct the command line here
|
|---|
| 3325 | instead of recursively calling ourselves, because we
|
|---|
| 3326 | cannot backslash-escape the special characters (see above). */
|
|---|
| 3327 | new_argv = xmalloc (sizeof (char *));
|
|---|
| 3328 | line_len = strlen (new_line) - shell_len - sflags_len - 2;
|
|---|
| 3329 | new_argv[0] = xmalloc (line_len + 1);
|
|---|
| 3330 | strncpy (new_argv[0],
|
|---|
| 3331 | new_line + shell_len + sflags_len + 2, line_len);
|
|---|
| 3332 | new_argv[0][line_len] = '\0';
|
|---|
| 3333 | }
|
|---|
| 3334 | #else
|
|---|
| 3335 | else
|
|---|
| 3336 | fatal (NILF, CSTRLEN (__FILE__) + INTSTR_LENGTH,
|
|---|
| 3337 | _("%s (line %d) Bad shell context (!unixy && !batch_mode_shell)\n"),
|
|---|
| 3338 | __FILE__, __LINE__);
|
|---|
| 3339 | #endif
|
|---|
| 3340 |
|
|---|
| 3341 | free (new_line);
|
|---|
| 3342 | }
|
|---|
| 3343 | #endif /* ! AMIGA */
|
|---|
| 3344 |
|
|---|
| 3345 | return new_argv;
|
|---|
| 3346 | }
|
|---|
| 3347 | #endif /* !VMS */
|
|---|
| 3348 |
|
|---|
| 3349 | /* Figure out the argument list necessary to run LINE as a command. Try to
|
|---|
| 3350 | avoid using a shell. This routine handles only ' quoting, and " quoting
|
|---|
| 3351 | when no backslash, $ or ' characters are seen in the quotes. Starting
|
|---|
| 3352 | quotes may be escaped with a backslash. If any of the characters in
|
|---|
| 3353 | sh_chars is seen, or any of the builtin commands listed in sh_cmds
|
|---|
| 3354 | is the first word of a line, the shell is used.
|
|---|
| 3355 |
|
|---|
| 3356 | If RESTP is not NULL, *RESTP is set to point to the first newline in LINE.
|
|---|
| 3357 | If *RESTP is NULL, newlines will be ignored.
|
|---|
| 3358 |
|
|---|
| 3359 | FILE is the target whose commands these are. It is used for
|
|---|
| 3360 | variable expansion for $(SHELL) and $(IFS). */
|
|---|
| 3361 |
|
|---|
| 3362 | char **
|
|---|
| 3363 | construct_command_argv (char *line, char **restp, struct file *file,
|
|---|
| 3364 | int cmd_flags, char **batch_filename)
|
|---|
| 3365 | {
|
|---|
| 3366 | char *shell, *ifs, *shellflags;
|
|---|
| 3367 | char **argv;
|
|---|
| 3368 |
|
|---|
| 3369 | #ifdef VMS
|
|---|
| 3370 | char *cptr;
|
|---|
| 3371 | int argc;
|
|---|
| 3372 |
|
|---|
| 3373 | argc = 0;
|
|---|
| 3374 | cptr = line;
|
|---|
| 3375 | for (;;)
|
|---|
| 3376 | {
|
|---|
| 3377 | while ((*cptr != 0) && (ISSPACE (*cptr)))
|
|---|
| 3378 | cptr++;
|
|---|
| 3379 | if (*cptr == 0)
|
|---|
| 3380 | break;
|
|---|
| 3381 | while ((*cptr != 0) && (!ISSPACE (*cptr)))
|
|---|
| 3382 | cptr++;
|
|---|
| 3383 | argc++;
|
|---|
| 3384 | }
|
|---|
| 3385 |
|
|---|
| 3386 | argv = xmalloc (argc * sizeof (char *));
|
|---|
| 3387 | if (argv == 0)
|
|---|
| 3388 | abort ();
|
|---|
| 3389 |
|
|---|
| 3390 | cptr = line;
|
|---|
| 3391 | argc = 0;
|
|---|
| 3392 | for (;;)
|
|---|
| 3393 | {
|
|---|
| 3394 | while ((*cptr != 0) && (ISSPACE (*cptr)))
|
|---|
| 3395 | cptr++;
|
|---|
| 3396 | if (*cptr == 0)
|
|---|
| 3397 | break;
|
|---|
| 3398 | DB (DB_JOBS, ("argv[%d] = [%s]\n", argc, cptr));
|
|---|
| 3399 | argv[argc++] = cptr;
|
|---|
| 3400 | while ((*cptr != 0) && (!ISSPACE (*cptr)))
|
|---|
| 3401 | cptr++;
|
|---|
| 3402 | if (*cptr != 0)
|
|---|
| 3403 | *cptr++ = 0;
|
|---|
| 3404 | }
|
|---|
| 3405 | #else
|
|---|
| 3406 | {
|
|---|
| 3407 | /* Turn off --warn-undefined-variables while we expand SHELL and IFS. */
|
|---|
| 3408 | int save = warn_undefined_variables_flag;
|
|---|
| 3409 | warn_undefined_variables_flag = 0;
|
|---|
| 3410 |
|
|---|
| 3411 | shell = allocated_variable_expand_for_file ("$(SHELL)", file);
|
|---|
| 3412 | #ifdef WINDOWS32
|
|---|
| 3413 | /*
|
|---|
| 3414 | * Convert to forward slashes so that construct_command_argv_internal()
|
|---|
| 3415 | * is not confused.
|
|---|
| 3416 | */
|
|---|
| 3417 | if (shell)
|
|---|
| 3418 | {
|
|---|
| 3419 | char *p = w32ify (shell, 0);
|
|---|
| 3420 | strcpy (shell, p);
|
|---|
| 3421 | }
|
|---|
| 3422 | #endif
|
|---|
| 3423 | #ifdef __EMX__
|
|---|
| 3424 | {
|
|---|
| 3425 | static const char *unixroot = NULL;
|
|---|
| 3426 | static const char *last_shell = "";
|
|---|
| 3427 | static int init = 0;
|
|---|
| 3428 | if (init == 0)
|
|---|
| 3429 | {
|
|---|
| 3430 | unixroot = getenv ("UNIXROOT");
|
|---|
| 3431 | /* unixroot must be NULL or not empty */
|
|---|
| 3432 | if (unixroot && unixroot[0] == '\0') unixroot = NULL;
|
|---|
| 3433 | init = 1;
|
|---|
| 3434 | }
|
|---|
| 3435 |
|
|---|
| 3436 | /* if we have an unixroot drive and if shell is not default_shell
|
|---|
| 3437 | (which means it's either cmd.exe or the test has already been
|
|---|
| 3438 | performed) and if shell is an absolute path without drive letter,
|
|---|
| 3439 | try whether it exists e.g.: if "/bin/sh" does not exist use
|
|---|
| 3440 | "$UNIXROOT/bin/sh" instead. */
|
|---|
| 3441 | if (unixroot && shell && strcmp (shell, last_shell) != 0
|
|---|
| 3442 | && (shell[0] == '/' || shell[0] == '\\'))
|
|---|
| 3443 | {
|
|---|
| 3444 | /* trying a new shell, check whether it exists */
|
|---|
| 3445 | size_t size = strlen (shell);
|
|---|
| 3446 | char *buf = xmalloc (size + 7);
|
|---|
| 3447 | memcpy (buf, shell, size);
|
|---|
| 3448 | memcpy (buf + size, ".exe", 5); /* including the trailing '\0' */
|
|---|
| 3449 | if (access (shell, F_OK) != 0 && access (buf, F_OK) != 0)
|
|---|
| 3450 | {
|
|---|
| 3451 | /* try the same for the unixroot drive */
|
|---|
| 3452 | memmove (buf + 2, buf, size + 5);
|
|---|
| 3453 | buf[0] = unixroot[0];
|
|---|
| 3454 | buf[1] = unixroot[1];
|
|---|
| 3455 | if (access (buf, F_OK) == 0)
|
|---|
| 3456 | /* we have found a shell! */
|
|---|
| 3457 | /* free(shell); */
|
|---|
| 3458 | shell = buf;
|
|---|
| 3459 | else
|
|---|
| 3460 | free (buf);
|
|---|
| 3461 | }
|
|---|
| 3462 | else
|
|---|
| 3463 | free (buf);
|
|---|
| 3464 | }
|
|---|
| 3465 | }
|
|---|
| 3466 | #endif /* __EMX__ */
|
|---|
| 3467 |
|
|---|
| 3468 | shellflags = allocated_variable_expand_for_file ("$(.SHELLFLAGS)", file);
|
|---|
| 3469 | ifs = allocated_variable_expand_for_file ("$(IFS)", file);
|
|---|
| 3470 |
|
|---|
| 3471 | warn_undefined_variables_flag = save;
|
|---|
| 3472 | }
|
|---|
| 3473 |
|
|---|
| 3474 | argv = construct_command_argv_internal (line, restp, shell, shellflags, ifs,
|
|---|
| 3475 | cmd_flags, batch_filename);
|
|---|
| 3476 |
|
|---|
| 3477 | free (shell);
|
|---|
| 3478 | free (shellflags);
|
|---|
| 3479 | free (ifs);
|
|---|
| 3480 | #endif /* !VMS */
|
|---|
| 3481 | return argv;
|
|---|
| 3482 | }
|
|---|
| 3483 | |
|---|
| 3484 |
|
|---|
| 3485 | #if !defined(HAVE_DUP2) && !defined(_AMIGA)
|
|---|
| 3486 | int
|
|---|
| 3487 | dup2 (int old, int new)
|
|---|
| 3488 | {
|
|---|
| 3489 | int fd;
|
|---|
| 3490 |
|
|---|
| 3491 | (void) close (new);
|
|---|
| 3492 | EINTRLOOP (fd, dup (old));
|
|---|
| 3493 | if (fd != new)
|
|---|
| 3494 | {
|
|---|
| 3495 | (void) close (fd);
|
|---|
| 3496 | errno = EMFILE;
|
|---|
| 3497 | return -1;
|
|---|
| 3498 | }
|
|---|
| 3499 |
|
|---|
| 3500 | return fd;
|
|---|
| 3501 | }
|
|---|
| 3502 | #endif /* !HAVE_DUP2 && !_AMIGA */
|
|---|
| 3503 |
|
|---|
| 3504 | /* On VMS systems, include special VMS functions. */
|
|---|
| 3505 |
|
|---|
| 3506 | #ifdef VMS
|
|---|
| 3507 | #include "vmsjobs.c"
|
|---|
| 3508 | #endif
|
|---|