Mercurial > hg > octave-kai > gnulib-hg
annotate lib/utime.c @ 7302:8a1a9361108c
* _fpending.c: Include <config.h> unconditionally, since we no
longer worry about uses that don't define HAVE_CONFIG_H.
* acl.c, alloca.c, argmatch.c, atexit.c, backupfile.c:
* basename.c, c-stack.c, c-strtod.c, calloc.c, canon-host.c:
* canonicalize.c, chdir-long.c, chdir-safer.c, chown.c:
* cloexec.c, close-stream.c, closeout.c, creat-safer.c:
* cycle-check.c, diacrit.c, dirchownmod.c, dirfd.c, dirname.c:
* dup-safer.c, dup2.c, error.c, euidaccess.c, exclude.c:
* exitfail.c, fchmodat.c, fchown-stub.c, fd-safer.c:
* file-type.c, fileblocks.c, filemode.c, filenamecat.c:
* fnmatch.c, fopen-safer.c, fprintftime.c, free.c, fsusage.c:
* ftruncate.c, fts-cycle.c, fts.c, full-write.c, gai_strerror.c:
* getcwd.c, getdate.y, getdomainname.c, getgroups.c:
* gethostname.c, gethrxtime.c, getloadavg.c, getlogin_r.c:
* getndelim2.c, getnline.c, getopt.c, getopt1.c, getpass.c:
* gettime.c, gettimeofday.c, getugroups.c, getusershell.c:
* glob.c, group-member.c, hard-locale.c, hash-pjw.c, hash.c:
* human.c, idcache.c, inet_ntop.c, inet_pton.c, inttostr.c:
* isdir.c, lchown.c, linebuffer.c, long-options.c, lstat.c:
* malloc.c, md5.c, memcasecmp.c, memchr.c, memcmp.c, memcoll.c:
* memcpy.c, memmove.c, memrchr.c, mkancesdirs.c, mkdir-p.c:
* mkdir.c, mkdirat.c, mkstemp-safer.c, mkstemp.c, modechange.c:
* mountlist.c, nanosleep.c, obstack.c, open-safer.c:
* openat-die.c, openat.c, pagealign_alloc.c, physmem.c:
* pipe-safer.c, posixtm.c, posixver.c, putenv.c, quote.c:
* quotearg.c, raise.c, readtokens.c, readtokens0.c, readutmp.c:
* realloc.c, regex.c, rename.c, rmdir.c, rpmatch.c, safe-read.c:
* same.c, save-cwd.c, savedir.c, setenv.c, settime.c, sha1.c:
* sig2str.c, snprintf.c, strdup.c, strerror.c, strftime.c:
* stripslash.c, strndup.c, strnlen.c, strpbrk.c, strtod.c:
* strtoimax.c, strtol.c, strverscmp.c, tempname.c, time_r.c:
* timegm.c, tmpfile-safer.c, unlinkdir.c, userspec.c, utime.c:
* utimecmp.c, utimens.c, version-etc-fsf.c, version-etc.c:
* xalloc-die.c, xgetcwd.c, xgethostname.c, xmalloc.c:
* xmemcoll.c, xnanosleep.c, xreadlink.c, xstrtod.c:
* xstrtoimax.c, xstrtol.c, xstrtoumax.c, yesno.c:
Likewise.
| author | Paul Eggert <eggert@cs.ucla.edu> |
|---|---|
| date | Wed, 13 Sep 2006 22:38:14 +0000 |
| parents | a48fb0e98c8c |
| children | cb2590895141 |
| rev | line source |
|---|---|
|
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* _fpending.c: Include <config.h> unconditionally, since we no
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1 /* Copyright (C) 1998, 2001, 2002, 2003, 2004, 2006 Free Software |
|
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2 Foundation, Inc. |
| 1442 | 3 |
| 4 This program is free software; you can redistribute it and/or modify it | |
| 5 under the terms of the GNU General Public License as published by the | |
| 6 Free Software Foundation; either version 2, or (at your option) any | |
| 7 later version. | |
| 8 | |
| 9 This program is distributed in the hope that it will be useful, | |
| 10 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 GNU General Public License for more details. | |
| 13 | |
| 14 You should have received a copy of the GNU General Public License | |
| 15 along with this program; if not, write to the Free Software Foundation, | |
|
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16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ |
| 1442 | 17 |
| 18 /* derived from a function in touch.c */ | |
| 19 | |
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20 #include <config.h> |
| 1442 | 21 #undef utime |
| 22 | |
| 23 #include <sys/types.h> | |
| 24 | |
| 25 #ifdef HAVE_UTIME_H | |
| 26 # include <utime.h> | |
| 27 #endif | |
| 28 | |
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29 #if !HAVE_UTIMES_NULL |
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30 # include <sys/stat.h> |
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31 # include <fcntl.h> |
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32 #endif |
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33 |
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34 #include <unistd.h> |
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35 #include <errno.h> |
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36 |
| 3406 | 37 #include "full-write.h" |
| 1442 | 38 #include "safe-read.h" |
| 39 | |
| 40 /* Some systems (even some that do have <utime.h>) don't declare this | |
| 41 structure anywhere. */ | |
| 42 #ifndef HAVE_STRUCT_UTIMBUF | |
| 43 struct utimbuf | |
| 44 { | |
| 45 long actime; | |
| 46 long modtime; | |
| 47 }; | |
| 48 #endif | |
| 49 | |
| 50 /* Emulate utime (file, NULL) for systems (like 4.3BSD) that do not | |
| 51 interpret it to set the access and modification times of FILE to | |
| 52 the current time. Return 0 if successful, -1 if not. */ | |
| 53 | |
| 54 static int | |
| 55 utime_null (const char *file) | |
| 56 { | |
| 57 #if HAVE_UTIMES_NULL | |
| 58 return utimes (file, 0); | |
| 59 #else | |
| 60 int fd; | |
| 61 char c; | |
| 62 int status = 0; | |
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63 struct stat st; |
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64 int saved_errno = 0; |
| 1442 | 65 |
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66 fd = open (file, O_RDWR); |
| 1442 | 67 if (fd < 0 |
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68 || fstat (fd, &st) < 0 |
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69 || safe_read (fd, &c, sizeof c) == SAFE_READ_ERROR |
| 1442 | 70 || lseek (fd, (off_t) 0, SEEK_SET) < 0 |
| 3406 | 71 || full_write (fd, &c, sizeof c) != sizeof c |
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72 /* Maybe do this -- it's necessary on SunOS 4.1.3 with some combination |
| 1442 | 73 of patches, but that system doesn't use this code: it has utimes. |
| 74 || fsync (fd) < 0 | |
| 75 */ | |
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76 || (st.st_size == 0 && ftruncate (fd, st.st_size) < 0)) |
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77 { |
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78 saved_errno = errno; |
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79 status = -1; |
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80 } |
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81 |
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82 if (0 <= fd) |
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83 { |
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84 if (close (fd) < 0) |
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85 status = -1; |
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86 |
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87 /* If there was a prior failure, use the saved errno value. |
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88 But if the only failure was in the close, don't change errno. */ |
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89 if (saved_errno) |
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90 errno = saved_errno; |
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91 } |
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92 |
| 1442 | 93 return status; |
| 94 #endif | |
| 95 } | |
| 96 | |
| 97 int | |
| 98 rpl_utime (const char *file, const struct utimbuf *times) | |
| 99 { | |
| 100 if (times) | |
| 101 return utime (file, times); | |
| 102 | |
| 103 return utime_null (file); | |
| 104 } |