mirror of
https://https.git.savannah.gnu.org/git/gnulib.git
synced 2026-10-03 23:58:33 +00:00
Paul Eggert
0632e11574
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.
105 lines
2.5 KiB
C
105 lines
2.5 KiB
C
/* Copyright (C) 1998, 2001, 2002, 2003, 2004, 2006 Free Software
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Foundation, Inc.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option) any
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later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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/* derived from a function in touch.c */
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#include <config.h>
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#undef utime
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#include <sys/types.h>
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#ifdef HAVE_UTIME_H
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# include <utime.h>
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#endif
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#if !HAVE_UTIMES_NULL
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# include <sys/stat.h>
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# include <fcntl.h>
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#endif
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#include <unistd.h>
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#include <errno.h>
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#include "full-write.h"
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#include "safe-read.h"
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/* Some systems (even some that do have <utime.h>) don't declare this
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structure anywhere. */
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#ifndef HAVE_STRUCT_UTIMBUF
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struct utimbuf
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{
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long actime;
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long modtime;
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};
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#endif
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/* Emulate utime (file, NULL) for systems (like 4.3BSD) that do not
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interpret it to set the access and modification times of FILE to
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the current time. Return 0 if successful, -1 if not. */
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static int
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utime_null (const char *file)
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{
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#if HAVE_UTIMES_NULL
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return utimes (file, 0);
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#else
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int fd;
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char c;
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int status = 0;
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struct stat st;
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int saved_errno = 0;
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fd = open (file, O_RDWR);
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if (fd < 0
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|| fstat (fd, &st) < 0
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|| safe_read (fd, &c, sizeof c) == SAFE_READ_ERROR
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|| lseek (fd, (off_t) 0, SEEK_SET) < 0
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|| full_write (fd, &c, sizeof c) != sizeof c
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/* Maybe do this -- it's necessary on SunOS 4.1.3 with some combination
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of patches, but that system doesn't use this code: it has utimes.
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|| fsync (fd) < 0
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*/
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|| (st.st_size == 0 && ftruncate (fd, st.st_size) < 0))
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{
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saved_errno = errno;
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status = -1;
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}
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if (0 <= fd)
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{
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if (close (fd) < 0)
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status = -1;
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/* If there was a prior failure, use the saved errno value.
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But if the only failure was in the close, don't change errno. */
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if (saved_errno)
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errno = saved_errno;
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}
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return status;
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#endif
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}
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int
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rpl_utime (const char *file, const struct utimbuf *times)
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{
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if (times)
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return utime (file, times);
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return utime_null (file);
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}
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