| 1 | /* fstat() replacement.
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| 2 | Copyright (C) 2011-2012 Free Software Foundation, Inc.
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| 3 |
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| 4 | This program is free software: you can redistribute it and/or modify
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| 5 | it under the terms of the GNU General Public License as published by
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| 6 | the Free Software Foundation; either version 3 of the License, or
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| 7 | (at your option) any later version.
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| 8 |
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| 9 | This program is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 12 | 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
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| 15 | along with this program. If not, see <http://www.gnu.org/licenses/>. */
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| 16 |
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| 17 | /* If the user's config.h happens to include <sys/stat.h>, let it include only
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| 18 | the system's <sys/stat.h> here, so that orig_fstat doesn't recurse to
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| 19 | rpl_fstat. */
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| 20 | #define __need_system_sys_stat_h
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| 21 | #include <config.h>
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| 22 |
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| 23 | /* Get the original definition of fstat. It might be defined as a macro. */
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| 24 | #include <sys/types.h>
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| 25 | #include <sys/stat.h>
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| 26 | #if _GL_WINDOWS_64_BIT_ST_SIZE
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| 27 | # define stat _stati64
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| 28 | # define fstat _fstati64
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| 29 | #endif
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| 30 | #undef __need_system_sys_stat_h
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| 31 |
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| 32 | static inline int
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| 33 | orig_fstat (int fd, struct stat *buf)
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| 34 | {
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| 35 | return fstat (fd, buf);
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| 36 | }
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| 37 |
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| 38 | /* Specification. */
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| 39 | /* Write "sys/stat.h" here, not <sys/stat.h>, otherwise OSF/1 5.1 DTK cc
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| 40 | eliminates this include because of the preliminary #include <sys/stat.h>
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| 41 | above. */
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| 42 | #include "sys/stat.h"
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| 43 |
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| 44 | #include <errno.h>
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| 45 | #include <unistd.h>
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| 46 |
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| 47 | #if HAVE_MSVC_INVALID_PARAMETER_HANDLER
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| 48 | # include "msvc-inval.h"
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| 49 | #endif
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| 50 |
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| 51 | #if HAVE_MSVC_INVALID_PARAMETER_HANDLER
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| 52 | static inline int
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| 53 | fstat_nothrow (int fd, struct stat *buf)
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| 54 | {
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| 55 | int result;
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| 56 |
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| 57 | TRY_MSVC_INVAL
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| 58 | {
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| 59 | result = orig_fstat (fd, buf);
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| 60 | }
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| 61 | CATCH_MSVC_INVAL
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| 62 | {
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| 63 | result = -1;
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| 64 | errno = EBADF;
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| 65 | }
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| 66 | DONE_MSVC_INVAL;
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| 67 |
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| 68 | return result;
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| 69 | }
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| 70 | #else
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| 71 | # define fstat_nothrow orig_fstat
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| 72 | #endif
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| 73 |
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| 74 | int
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| 75 | rpl_fstat (int fd, struct stat *buf)
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| 76 | {
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| 77 | #if REPLACE_FCHDIR && REPLACE_OPEN_DIRECTORY
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| 78 | /* Handle the case when rpl_open() used a dummy file descriptor to work
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| 79 | around an open() that can't normally visit directories. */
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| 80 | const char *name = _gl_directory_name (fd);
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| 81 | if (name != NULL)
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| 82 | return stat (name, buf);
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| 83 | #endif
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| 84 |
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| 85 | return fstat_nothrow (fd, buf);
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| 86 | }
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