[53] | 1 | /* GNU Make remote job exportation interface to the Customs daemon.
|
---|
| 2 | THIS CODE IS NOT SUPPORTED BY THE GNU PROJECT.
|
---|
| 3 | Please do not send bug reports or questions about it to
|
---|
| 4 | the Make maintainers.
|
---|
| 5 |
|
---|
[3140] | 6 | Copyright (C) 1988-2016 Free Software Foundation, Inc.
|
---|
[53] | 7 | This file is part of GNU Make.
|
---|
| 8 |
|
---|
[503] | 9 | GNU Make is free software; you can redistribute it and/or modify it under the
|
---|
| 10 | terms of the GNU General Public License as published by the Free Software
|
---|
[1993] | 11 | Foundation; either version 3 of the License, or (at your option) any later
|
---|
| 12 | version.
|
---|
[53] | 13 |
|
---|
[503] | 14 | GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
|
---|
| 15 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
|
---|
| 16 | A PARTICULAR PURPOSE. See the GNU General Public License for more details.
|
---|
[53] | 17 |
|
---|
[503] | 18 | You should have received a copy of the GNU General Public License along with
|
---|
[1993] | 19 | this program. If not, see <http://www.gnu.org/licenses/>. */
|
---|
[53] | 20 |
|
---|
[3140] | 21 | #include "makeint.h"
|
---|
[53] | 22 | #include "filedef.h"
|
---|
| 23 | #include "commands.h"
|
---|
| 24 | #include "job.h"
|
---|
| 25 | #include "debug.h"
|
---|
| 26 |
|
---|
| 27 | #include <sys/time.h>
|
---|
| 28 | #include <netdb.h>
|
---|
| 29 |
|
---|
| 30 | #include "customs.h"
|
---|
| 31 |
|
---|
| 32 | char *remote_description = "Customs";
|
---|
| 33 |
|
---|
[3140] | 34 | /* File name of the Customs 'export' client command.
|
---|
[53] | 35 | A full path name can be used to avoid some path-searching overhead. */
|
---|
[3140] | 36 | #define EXPORT_COMMAND "/usr/local/bin/export"
|
---|
[53] | 37 |
|
---|
| 38 | /* ExportPermit gotten by start_remote_job_p, and used by start_remote_job. */
|
---|
| 39 | static ExportPermit permit;
|
---|
| 40 |
|
---|
| 41 | /* Normalized path name of the current directory. */
|
---|
| 42 | static char *normalized_cwd;
|
---|
| 43 |
|
---|
| 44 | /* Call once at startup even if no commands are run. */
|
---|
| 45 |
|
---|
| 46 | void
|
---|
| 47 | remote_setup (void)
|
---|
| 48 | {
|
---|
| 49 | }
|
---|
| 50 |
|
---|
| 51 | /* Called before exit. */
|
---|
| 52 |
|
---|
| 53 | void
|
---|
| 54 | remote_cleanup (void)
|
---|
| 55 | {
|
---|
| 56 | }
|
---|
| 57 | |
---|
| 58 |
|
---|
| 59 | /* Return nonzero if the next job should be done remotely. */
|
---|
| 60 |
|
---|
| 61 | int
|
---|
| 62 | start_remote_job_p (int first_p)
|
---|
| 63 | {
|
---|
| 64 | static int inited = 0;
|
---|
| 65 | int status;
|
---|
| 66 | int njobs;
|
---|
| 67 |
|
---|
| 68 | if (!inited)
|
---|
| 69 | {
|
---|
| 70 | /* Allow the user to turn off job exportation (useful while he is
|
---|
| 71 | debugging Customs, for example). */
|
---|
| 72 | if (getenv ("GNU_MAKE_NO_CUSTOMS") != 0)
|
---|
| 73 | {
|
---|
| 74 | inited = -1;
|
---|
| 75 | return 0;
|
---|
| 76 | }
|
---|
| 77 |
|
---|
[3140] | 78 | /* For secure Customs, make is installed setuid root and
|
---|
[53] | 79 | Customs requires a privileged source port be used. */
|
---|
| 80 | make_access ();
|
---|
| 81 |
|
---|
[3140] | 82 | if (ISDB (DB_JOBS))
|
---|
[53] | 83 | Rpc_Debug (1);
|
---|
| 84 |
|
---|
| 85 | /* Ping the daemon once to see if it is there. */
|
---|
| 86 | inited = Customs_Ping () == RPC_SUCCESS ? 1 : -1;
|
---|
| 87 |
|
---|
| 88 | /* Return to normal user access. */
|
---|
| 89 | user_access ();
|
---|
| 90 |
|
---|
[3140] | 91 | if (starting_directory == 0)
|
---|
| 92 | /* main couldn't figure it out. */
|
---|
[53] | 93 | inited = -1;
|
---|
[3140] | 94 | else
|
---|
| 95 | {
|
---|
| 96 | /* Normalize the current directory path name to something
|
---|
[53] | 97 | that should work on all machines exported to. */
|
---|
[3140] | 98 |
|
---|
| 99 | normalized_cwd = xmalloc (GET_PATH_MAX);
|
---|
| 100 | strcpy (normalized_cwd, starting_directory);
|
---|
| 101 | if (Customs_NormPath (normalized_cwd, GET_PATH_MAX) < 0)
|
---|
| 102 | /* Path normalization failure means using Customs
|
---|
| 103 | won't work, but it's not really an error. */
|
---|
| 104 | inited = -1;
|
---|
[53] | 105 | }
|
---|
| 106 | }
|
---|
| 107 |
|
---|
| 108 | if (inited < 0)
|
---|
| 109 | return 0;
|
---|
| 110 |
|
---|
| 111 | njobs = job_slots_used;
|
---|
[3140] | 112 | if (!first_p)
|
---|
[53] | 113 | njobs -= 1; /* correction for being called from reap_children() */
|
---|
| 114 |
|
---|
| 115 | /* the first job should run locally, or, if the -l flag is given, we use
|
---|
| 116 | that as clue as to how many local jobs should be scheduled locally */
|
---|
| 117 | if (max_load_average < 0 && njobs == 0 || njobs < max_load_average)
|
---|
| 118 | return 0;
|
---|
| 119 |
|
---|
| 120 | status = Customs_Host (EXPORT_SAME, &permit);
|
---|
| 121 | if (status != RPC_SUCCESS)
|
---|
| 122 | {
|
---|
| 123 | DB (DB_JOBS, (_("Customs won't export: %s\n"),
|
---|
| 124 | Rpc_ErrorMessage (status)));
|
---|
| 125 | return 0;
|
---|
| 126 | }
|
---|
| 127 |
|
---|
| 128 | return !CUSTOMS_FAIL (&permit.addr);
|
---|
| 129 | }
|
---|
| 130 | |
---|
| 131 |
|
---|
| 132 | /* Start a remote job running the command in ARGV, with environment from
|
---|
| 133 | ENVP. It gets standard input from STDIN_FD. On failure, return
|
---|
| 134 | nonzero. On success, return zero, and set *USED_STDIN to nonzero if it
|
---|
| 135 | will actually use STDIN_FD, zero if not, set *ID_PTR to a unique
|
---|
| 136 | identification, and set *IS_REMOTE to nonzero if the job is remote, zero
|
---|
| 137 | if it is local (meaning *ID_PTR is a process ID). */
|
---|
| 138 |
|
---|
| 139 | int
|
---|
| 140 | start_remote_job (char **argv, char **envp, int stdin_fd,
|
---|
| 141 | int *is_remote, int *id_ptr, int *used_stdin)
|
---|
| 142 | {
|
---|
| 143 | char waybill[MAX_DATA_SIZE], msg[128];
|
---|
| 144 | struct hostent *host;
|
---|
| 145 | struct timeval timeout;
|
---|
| 146 | struct sockaddr_in sin;
|
---|
| 147 | int len;
|
---|
| 148 | int retsock, retport, sock;
|
---|
| 149 | Rpc_Stat status;
|
---|
| 150 | int pid;
|
---|
| 151 |
|
---|
| 152 | /* Create the return socket. */
|
---|
| 153 | retsock = Rpc_UdpCreate (True, 0);
|
---|
[3140] | 154 | if (retsock < 0)
|
---|
[53] | 155 | {
|
---|
| 156 | O (error, NILF, "exporting: Couldn't create return socket.");
|
---|
| 157 | return 1;
|
---|
| 158 | }
|
---|
| 159 |
|
---|
| 160 | /* Get the return socket's port number. */
|
---|
| 161 | len = sizeof (sin);
|
---|
| 162 | if (getsockname (retsock, (struct sockaddr *) &sin, &len) < 0)
|
---|
| 163 | {
|
---|
| 164 | (void) close (retsock);
|
---|
| 165 | perror_with_name ("exporting: ", "getsockname");
|
---|
| 166 | return 1;
|
---|
| 167 | }
|
---|
| 168 | retport = sin.sin_port;
|
---|
| 169 |
|
---|
| 170 | /* Create the TCP socket for talking to the remote child. */
|
---|
| 171 | sock = Rpc_TcpCreate (False, 0);
|
---|
| 172 |
|
---|
[3140] | 173 | /* Create a WayBill to give to the server. */
|
---|
[53] | 174 | len = Customs_MakeWayBill (&permit, normalized_cwd, argv[0], argv,
|
---|
[3140] | 175 | envp, retport, waybill);
|
---|
[53] | 176 |
|
---|
| 177 | /* Modify the waybill as if the remote child had done 'child_access ()'. */
|
---|
| 178 | {
|
---|
| 179 | WayBill *wb = (WayBill *) waybill;
|
---|
| 180 | wb->ruid = wb->euid;
|
---|
| 181 | wb->rgid = wb->egid;
|
---|
| 182 | }
|
---|
| 183 |
|
---|
| 184 | /* Send the request to the server, timing out in 20 seconds. */
|
---|
| 185 | timeout.tv_usec = 0;
|
---|
| 186 | timeout.tv_sec = 20;
|
---|
| 187 | sin.sin_family = AF_INET;
|
---|
| 188 | sin.sin_port = htons (Customs_Port ());
|
---|
[3140] | 189 | sin.sin_addr = permit.addr;
|
---|
| 190 | status = Rpc_Call (sock, &sin, (Rpc_Proc) CUSTOMS_IMPORT,
|
---|
| 191 | len, (Rpc_Opaque) waybill,
|
---|
[53] | 192 | sizeof (msg), (Rpc_Opaque) msg,
|
---|
[3140] | 193 | 1, &timeout);
|
---|
[53] | 194 |
|
---|
[3140] | 195 | host = gethostbyaddr ((char *)&permit.addr, sizeof(permit.addr), AF_INET);
|
---|
| 196 |
|
---|
| 197 | {
|
---|
[53] | 198 | const char *hnm = host ? host->h_name : inet_ntoa (permit.addr);
|
---|
[3140] | 199 | size_t hlen = strlen (hnm);
|
---|
| 200 |
|
---|
| 201 | if (status != RPC_SUCCESS)
|
---|
| 202 | {
|
---|
| 203 | const char *err = Rpc_ErrorMessage (status);
|
---|
| 204 | (void) close (retsock);
|
---|
| 205 | (void) close (sock);
|
---|
| 206 | error (NILF, hlen + strlen (err),
|
---|
| 207 | "exporting to %s: %s", hnm, err);
|
---|
| 208 | return 1;
|
---|
| 209 | }
|
---|
| 210 | else if (msg[0] != 'O' || msg[1] != 'k' || msg[2] != '\0')
|
---|
| 211 | {
|
---|
| 212 | (void) close (retsock);
|
---|
| 213 | (void) close (sock);
|
---|
| 214 | error (NILF, hlen + strlen (msg), "exporting to %s: %s", hnm, msg);
|
---|
| 215 | return 1;
|
---|
| 216 | }
|
---|
| 217 | else
|
---|
| 218 | {
|
---|
| 219 | error (NILF, hlen + INTSTR_LENGTH,
|
---|
[53] | 220 | "*** exported to %s (id %u)", hnm, permit.id);
|
---|
[3140] | 221 | }
|
---|
| 222 |
|
---|
| 223 | fflush (stdout);
|
---|
| 224 | fflush (stderr);
|
---|
[53] | 225 | }
|
---|
| 226 |
|
---|
| 227 | pid = vfork ();
|
---|
| 228 | if (pid < 0)
|
---|
[3140] | 229 | {
|
---|
[53] | 230 | /* The fork failed! */
|
---|
| 231 | perror_with_name ("fork", "");
|
---|
| 232 | return 1;
|
---|
| 233 | }
|
---|
[3140] | 234 | else if (pid == 0)
|
---|
[53] | 235 | {
|
---|
| 236 | /* Child side. Run 'export' to handle the connection. */
|
---|
[3140] | 237 | static char sock_buf[20], retsock_buf[20], id_buf[20];
|
---|
[53] | 238 | static char *new_argv[6] =
|
---|
| 239 | { EXPORT_COMMAND, "-id", sock_buf, retsock_buf, id_buf, 0 };
|
---|
| 240 |
|
---|
| 241 | /* Set up the arguments. */
|
---|
| 242 | (void) sprintf (sock_buf, "%d", sock);
|
---|
| 243 | (void) sprintf (retsock_buf, "%d", retsock);
|
---|
| 244 | (void) sprintf (id_buf, "%x", permit.id);
|
---|
| 245 |
|
---|
[3140] | 246 | /* Get the right stdin. */
|
---|
[53] | 247 | if (stdin_fd != 0)
|
---|
| 248 | (void) dup2 (stdin_fd, 0);
|
---|
| 249 |
|
---|
| 250 | /* Unblock signals in the child. */
|
---|
| 251 | unblock_sigs ();
|
---|
| 252 |
|
---|
| 253 | /* Run the command. */
|
---|
| 254 | exec_command (new_argv, envp);
|
---|
[3140] | 255 | }
|
---|
[53] | 256 |
|
---|
| 257 | /* Parent side. Return the 'export' process's ID. */
|
---|
| 258 | (void) close (retsock);
|
---|
| 259 | (void) close (sock);
|
---|
| 260 | *is_remote = 0;
|
---|
| 261 | *id_ptr = pid;
|
---|
| 262 | *used_stdin = 1;
|
---|
| 263 | return 0;
|
---|
| 264 | }
|
---|
| 265 | |
---|
| 266 |
|
---|
| 267 | /* Get the status of a dead remote child. Block waiting for one to die
|
---|
| 268 | if BLOCK is nonzero. Set *EXIT_CODE_PTR to the exit status, *SIGNAL_PTR
|
---|
| 269 | to the termination signal or zero if it exited normally, and *COREDUMP_PTR
|
---|
| 270 | nonzero if it dumped core. Return the ID of the child that died,
|
---|
| 271 | 0 if we would have to block and !BLOCK, or < 0 if there were none. */
|
---|
| 272 |
|
---|
| 273 | int
|
---|
| 274 | remote_status (int *exit_code_ptr, int *signal_ptr, int *coredump_ptr,
|
---|
| 275 | int block)
|
---|
| 276 | {
|
---|
| 277 | return -1;
|
---|
| 278 | }
|
---|
| 279 |
|
---|
| 280 | /* Block asynchronous notification of remote child death.
|
---|
| 281 | If this notification is done by raising the child termination
|
---|
| 282 | signal, do not block that signal. */
|
---|
| 283 | void
|
---|
| 284 | block_remote_children (void)
|
---|
| 285 | {
|
---|
| 286 | return;
|
---|
| 287 | }
|
---|
| 288 |
|
---|
| 289 | /* Restore asynchronous notification of remote child death.
|
---|
| 290 | If this is done by raising the child termination signal,
|
---|
| 291 | do not unblock that signal. */
|
---|
| 292 | void
|
---|
| 293 | unblock_remote_children (void)
|
---|
| 294 | {
|
---|
| 295 | return;
|
---|
| 296 | }
|
---|
| 297 |
|
---|
| 298 | /* Send signal SIG to child ID. Return 0 if successful, -1 if not. */
|
---|
| 299 | int
|
---|
| 300 | remote_kill (int id, int sig)
|
---|
| 301 | {
|
---|
| 302 | return -1;
|
---|
| 303 | }
|
---|