octave-nkf/gnulib-hg: lib/utimens.c annotate

annotate lib/utimens.c @ 14039:aeebba7a29c7

utimens: work around glibc rounding bug on older Linux kernels * lib/utimens.c (fdutimens): If invoking futimesat or futimes on Linux with a glibc whose utimes might not work, then work around a longstanding glibc bug involving rounding rather than truncated time stamps. Reported for Linux 2.4.21 by Bruno Haible in <http://lists.gnu.org/archive/html/bug-gnulib/2010-11/msg00113.html>.

author	Paul Eggert <eggert@cs.ucla.edu>
date	Mon, 27 Dec 2010 00:21:02 -0800
parents	bfe487360d66
children	126b2fb2abab

rev	line source
6734 3e5ad4566013 * utimens.c (futimens): glibc futimesat messes up if /proc Paul Eggert <eggert@cs.ucla.edu> parents: 6440 diff changeset	1 /* Set file access and modification times.
3e5ad4566013 * utimens.c (futimens): glibc futimesat messes up if /proc Paul Eggert <eggert@cs.ucla.edu> parents: 6440 diff changeset	2
12559 c2cbabec01dd update nearly all FSF copyright year lists to include 2010 Jim Meyering <meyering@redhat.com> parents: 12554 diff changeset	3 Copyright (C) 2003-2010 Free Software Foundation, Inc.
5147 3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	4
9309 bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+. Bruno Haible <bruno@clisp.org> parents: 8842 diff changeset	5 This program is free software: you can redistribute it and/or modify it
5147 3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	6 under the terms of the GNU General Public License as published by the
9309 bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+. Bruno Haible <bruno@clisp.org> parents: 8842 diff changeset	7 Free Software Foundation; either version 3 of the License, or any
5147 3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	8 later version.
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	9
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	10 This program is distributed in the hope that it will be useful,
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	11 but WITHOUT ANY WARRANTY; without even the implied warranty of
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	13 GNU General Public License for more details.
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	14
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	15 You should have received a copy of the GNU General Public License
9309 bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+. Bruno Haible <bruno@clisp.org> parents: 8842 diff changeset	16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
5147 3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	17
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	18 /* Written by Paul Eggert. */
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	19
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	20 /* derived from a function in touch.c */
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	21
7302 8a1a9361108c * _fpending.c: Include <config.h> unconditionally, since we no Paul Eggert <eggert@cs.ucla.edu> parents: 6819 diff changeset	22 #include <config.h>
5147 3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	23
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	24 #include "utimens.h"
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	25
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	26 #include <assert.h>
5589 6ddb405e16b6 (futimens): Account for the fact that futimes Paul Eggert <eggert@cs.ucla.edu> parents: 5485 diff changeset	27 #include <errno.h>
6283 b377d8796118 * lib/utimens.c (futimens): Use futimesat if available. Paul Eggert <eggert@cs.ucla.edu> parents: 5848 diff changeset	28 #include <fcntl.h>
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	29 #include <stdbool.h>
10133 bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	30 #include <sys/stat.h>
7897 b7a83a69ac23 * MODULES.html.sh (Support for systems lacking POSIX:2001): New Paul Eggert <eggert@cs.ucla.edu> parents: 7713 diff changeset	31 #include <sys/time.h>
6322 716071856296 Sync from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 6297 diff changeset	32 #include <unistd.h>
5589 6ddb405e16b6 (futimens): Account for the fact that futimes Paul Eggert <eggert@cs.ucla.edu> parents: 5485 diff changeset	33
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	34 #include "stat-time.h"
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	35 #include "timespec.h"
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	36
5147 3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	37 #if HAVE_UTIME_H
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	38 # include <utime.h>
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	39 #endif
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	40
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	41 /* Some systems (even some that do have <utime.h>) don't declare this
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	42 structure anywhere. */
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	43 #ifndef HAVE_STRUCT_UTIMBUF
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	44 struct utimbuf
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	45 {
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	46 long actime;
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	47 long modtime;
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	48 };
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	49 #endif
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	50
12174 73f2681e0524 utimensat: new module Eric Blake <ebb9@byu.net> parents: 12173 diff changeset	51 /* Avoid recursion with rpl_futimens or rpl_utimensat. */
12162 fe82ecf4f214 futimens: new module Eric Blake <ebb9@byu.net> parents: 12161 diff changeset	52 #undef futimens
12174 73f2681e0524 utimensat: new module Eric Blake <ebb9@byu.net> parents: 12173 diff changeset	53 #undef utimensat
12162 fe82ecf4f214 futimens: new module Eric Blake <ebb9@byu.net> parents: 12161 diff changeset	54
12194 16c7c4fa9754 utimensat: work around Solaris 9 bug Eric Blake <ebb9@byu.net> parents: 12174 diff changeset	55 /* Solaris 9 mistakenly succeeds when given a non-directory with a
16c7c4fa9754 utimensat: work around Solaris 9 bug Eric Blake <ebb9@byu.net> parents: 12174 diff changeset	56 trailing slash. Force the use of rpl_stat for a fix. */
16c7c4fa9754 utimensat: work around Solaris 9 bug Eric Blake <ebb9@byu.net> parents: 12174 diff changeset	57 #ifndef REPLACE_FUNC_STAT_FILE
16c7c4fa9754 utimensat: work around Solaris 9 bug Eric Blake <ebb9@byu.net> parents: 12174 diff changeset	58 # define REPLACE_FUNC_STAT_FILE 0
16c7c4fa9754 utimensat: work around Solaris 9 bug Eric Blake <ebb9@byu.net> parents: 12174 diff changeset	59 #endif
16c7c4fa9754 utimensat: work around Solaris 9 bug Eric Blake <ebb9@byu.net> parents: 12174 diff changeset	60
12467 912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	61 #if HAVE_UTIMENSAT \|\| HAVE_FUTIMENS
912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	62 /* Cache variables for whether the utimensat syscall works; used to
912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	63 avoid calling the syscall if we know it will just fail with ENOSYS,
912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	64 and to avoid unnecessary work in massaging timestamps if the
912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	65 syscall will work. Multiple variables are needed, to distinguish
912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	66 between the following scenarios on Linux:
912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	67 utimensat doesn't exist, or is in glibc but kernel 2.6.18 fails with ENOSYS
912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	68 kernel 2.6.22 and earlier rejects AT_SYMLINK_NOFOLLOW
912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	69 kernel 2.6.25 and earlier reject UTIME_NOW/UTIME_OMIT with non-zero tv_sec
12525 53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	70 kernel 2.6.32 used with xfs or ntfs-3g fail to honor UTIME_OMIT
12467 912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	71 utimensat completely works
912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	72 For each cache variable: 0 = unknown, 1 = yes, -1 = no. */
912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	73 static int utimensat_works_really;
912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	74 static int lutimensat_works_really;
912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	75 #endif /* HAVE_UTIMENSAT \|\| HAVE_FUTIMENS */
912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	76
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	77 /* Validate the requested timestamps. Return 0 if the resulting
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	78 timespec can be used for utimensat (after possibly modifying it to
12467 912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	79 work around bugs in utimensat). Return a positive value if the
912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	80 timespec needs further adjustment based on stat results: 1 if any
12525 53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	81 adjustment is needed for utimes, and 2 if any adjustment is needed
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	82 for Linux utimensat. Return -1, with errno set to EINVAL, if
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	83 timespec is out of range. */
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	84 static int
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	85 validate_timespec (struct timespec timespec[2])
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	86 {
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	87 int result = 0;
12525 53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	88 int utime_omit_count = 0;
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	89 assert (timespec);
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	90 if ((timespec[0].tv_nsec != UTIME_NOW
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	91 && timespec[0].tv_nsec != UTIME_OMIT
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	92 && (timespec[0].tv_nsec < 0 \|\| 1000000000 <= timespec[0].tv_nsec))
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	93 \|\| (timespec[1].tv_nsec != UTIME_NOW
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	94 && timespec[1].tv_nsec != UTIME_OMIT
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	95 && (timespec[1].tv_nsec < 0 \|\| 1000000000 <= timespec[1].tv_nsec)))
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	96 {
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	97 errno = EINVAL;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	98 return -1;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	99 }
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	100 /* Work around Linux kernel 2.6.25 bug, where utimensat fails with
12467 912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	101 EINVAL if tv_sec is not 0 when using the flag values of tv_nsec.
912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	102 Flag a Linux kernel 2.6.32 bug, where an mtime of UTIME_OMIT
912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	103 fails to bump ctime. */
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	104 if (timespec[0].tv_nsec == UTIME_NOW
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	105 \|\| timespec[0].tv_nsec == UTIME_OMIT)
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	106 {
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	107 timespec[0].tv_sec = 0;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	108 result = 1;
12525 53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	109 if (timespec[0].tv_nsec == UTIME_OMIT)
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	110 utime_omit_count++;
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	111 }
12525 53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	112 if (timespec[1].tv_nsec == UTIME_NOW
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	113 \|\| timespec[1].tv_nsec == UTIME_OMIT)
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	114 {
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	115 timespec[1].tv_sec = 0;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	116 result = 1;
12525 53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	117 if (timespec[1].tv_nsec == UTIME_OMIT)
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	118 utime_omit_count++;
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	119 }
12525 53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	120 return result + (utime_omit_count == 1);
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	121 }
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	122
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	123 /* Normalize any UTIME_NOW or UTIME_OMIT values in *TS, using stat
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	124 buffer STATBUF to obtain the current timestamps of the file. If
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	125 both times are UTIME_NOW, set *TS to NULL (as this can avoid some
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	126 permissions issues). If both times are UTIME_OMIT, return true
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	127 (nothing further beyond the prior collection of STATBUF is
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	128 necessary); otherwise return false. */
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	129 static bool
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	130 update_timespec (struct stat const statbuf, struct timespec ts[2])
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	131 {
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	132 struct timespec timespec = ts;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	133 if (timespec[0].tv_nsec == UTIME_OMIT
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	134 && timespec[1].tv_nsec == UTIME_OMIT)
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	135 return true;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	136 if (timespec[0].tv_nsec == UTIME_NOW
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	137 && timespec[1].tv_nsec == UTIME_NOW)
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	138 {
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	139 *ts = NULL;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	140 return false;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	141 }
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	142
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	143 if (timespec[0].tv_nsec == UTIME_OMIT)
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	144 timespec[0] = get_stat_atime (statbuf);
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	145 else if (timespec[0].tv_nsec == UTIME_NOW)
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	146 gettime (&timespec[0]);
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	147
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	148 if (timespec[1].tv_nsec == UTIME_OMIT)
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	149 timespec[1] = get_stat_mtime (statbuf);
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	150 else if (timespec[1].tv_nsec == UTIME_NOW)
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	151 gettime (&timespec[1]);
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	152
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	153 return false;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	154 }
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	155
5485 863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	156 /* Set the access and modification time stamps of FD (a.k.a. FILE) to be
863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	157 TIMESPEC[0] and TIMESPEC[1], respectively.
863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	158 FD must be either negative -- in which case it is ignored --
863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	159 or a file descriptor that is open on FILE.
6297 10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	160 If FD is nonnegative, then FILE can be NULL, which means
10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	161 use just futimes (or equivalent) instead of utimes (or equivalent),
10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	162 and fail if on an old system without futimes (or equivalent).
10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	163 If TIMESPEC is null, set the time stamps to the current time.
10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	164 Return 0 on success, -1 (setting errno) on failure. */
5147 3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	165
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	166 int
13696 bfe487360d66 fdutimens, fdutimensat: update signature, again Eric Blake <eblake@redhat.com> parents: 13284 diff changeset	167 fdutimens (int fd, char const *file, struct timespec const timespec[2])
5147 3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	168 {
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	169 struct timespec adjusted_timespec[2];
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	170 struct timespec *ts = timespec ? adjusted_timespec : NULL;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	171 int adjustment_needed = 0;
12554 0774f328f2ff utimens: avoid shadowing warning Eric Blake <ebb9@byu.net> parents: 12525 diff changeset	172 struct stat st;
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	173
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	174 if (ts)
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	175 {
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	176 adjusted_timespec[0] = timespec[0];
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	177 adjusted_timespec[1] = timespec[1];
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	178 adjustment_needed = validate_timespec (ts);
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	179 }
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	180 if (adjustment_needed < 0)
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	181 return -1;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	182
12157 7fb8a2ac5948 utimens: validate futimens usage Eric Blake <ebb9@byu.net> parents: 12134 diff changeset	183 /* Require that at least one of FD or FILE are valid. Works around
7fb8a2ac5948 utimens: validate futimens usage Eric Blake <ebb9@byu.net> parents: 12134 diff changeset	184 a Linux bug where futimens (AT_FDCWD, NULL) changes "." rather
7fb8a2ac5948 utimens: validate futimens usage Eric Blake <ebb9@byu.net> parents: 12134 diff changeset	185 than failing. */
7fb8a2ac5948 utimens: validate futimens usage Eric Blake <ebb9@byu.net> parents: 12134 diff changeset	186 if (!file)
7fb8a2ac5948 utimens: validate futimens usage Eric Blake <ebb9@byu.net> parents: 12134 diff changeset	187 {
7fb8a2ac5948 utimens: validate futimens usage Eric Blake <ebb9@byu.net> parents: 12134 diff changeset	188 if (fd < 0)
7fb8a2ac5948 utimens: validate futimens usage Eric Blake <ebb9@byu.net> parents: 12134 diff changeset	189 {
7fb8a2ac5948 utimens: validate futimens usage Eric Blake <ebb9@byu.net> parents: 12134 diff changeset	190 errno = EBADF;
7fb8a2ac5948 utimens: validate futimens usage Eric Blake <ebb9@byu.net> parents: 12134 diff changeset	191 return -1;
7fb8a2ac5948 utimens: validate futimens usage Eric Blake <ebb9@byu.net> parents: 12134 diff changeset	192 }
7fb8a2ac5948 utimens: validate futimens usage Eric Blake <ebb9@byu.net> parents: 12134 diff changeset	193 if (dup2 (fd, fd) != fd)
7fb8a2ac5948 utimens: validate futimens usage Eric Blake <ebb9@byu.net> parents: 12134 diff changeset	194 return -1;
7fb8a2ac5948 utimens: validate futimens usage Eric Blake <ebb9@byu.net> parents: 12134 diff changeset	195 }
7fb8a2ac5948 utimens: validate futimens usage Eric Blake <ebb9@byu.net> parents: 12134 diff changeset	196
7712 aead3397193a * lib/utimens.c (futimens) [HAVE_BUGGY_NFS_TIME_STAMPS]: Add a Paul Eggert <eggert@cs.ucla.edu> parents: 7302 diff changeset	197 /* Some Linux-based NFS clients are buggy, and mishandle time stamps
aead3397193a * lib/utimens.c (futimens) [HAVE_BUGGY_NFS_TIME_STAMPS]: Add a Paul Eggert <eggert@cs.ucla.edu> parents: 7302 diff changeset	198 of files in NFS file systems in some cases. We have no
aead3397193a * lib/utimens.c (futimens) [HAVE_BUGGY_NFS_TIME_STAMPS]: Add a Paul Eggert <eggert@cs.ucla.edu> parents: 7302 diff changeset	199 configure-time test for this, but please see
aead3397193a * lib/utimens.c (futimens) [HAVE_BUGGY_NFS_TIME_STAMPS]: Add a Paul Eggert <eggert@cs.ucla.edu> parents: 7302 diff changeset	200 <http://bugs.gentoo.org/show_bug.cgi?id=132673> for references to
aead3397193a * lib/utimens.c (futimens) [HAVE_BUGGY_NFS_TIME_STAMPS]: Add a Paul Eggert <eggert@cs.ucla.edu> parents: 7302 diff changeset	201 some of the problems with Linux 2.6.16. If this affects you,
aead3397193a * lib/utimens.c (futimens) [HAVE_BUGGY_NFS_TIME_STAMPS]: Add a Paul Eggert <eggert@cs.ucla.edu> parents: 7302 diff changeset	202 compile with -DHAVE_BUGGY_NFS_TIME_STAMPS; this is reported to
aead3397193a * lib/utimens.c (futimens) [HAVE_BUGGY_NFS_TIME_STAMPS]: Add a Paul Eggert <eggert@cs.ucla.edu> parents: 7302 diff changeset	203 help in some cases, albeit at a cost in performance. But you
aead3397193a * lib/utimens.c (futimens) [HAVE_BUGGY_NFS_TIME_STAMPS]: Add a Paul Eggert <eggert@cs.ucla.edu> parents: 7302 diff changeset	204 really should upgrade your kernel to a fixed version, since the
aead3397193a * lib/utimens.c (futimens) [HAVE_BUGGY_NFS_TIME_STAMPS]: Add a Paul Eggert <eggert@cs.ucla.edu> parents: 7302 diff changeset	205 problem affects many applications. */
aead3397193a * lib/utimens.c (futimens) [HAVE_BUGGY_NFS_TIME_STAMPS]: Add a Paul Eggert <eggert@cs.ucla.edu> parents: 7302 diff changeset	206
aead3397193a * lib/utimens.c (futimens) [HAVE_BUGGY_NFS_TIME_STAMPS]: Add a Paul Eggert <eggert@cs.ucla.edu> parents: 7302 diff changeset	207 #if HAVE_BUGGY_NFS_TIME_STAMPS
7713 064005e1c3c3 Prefer fd < 0 to ! (0 <= fd). Paul Eggert <eggert@cs.ucla.edu> parents: 7712 diff changeset	208 if (fd < 0)
064005e1c3c3 Prefer fd < 0 to ! (0 <= fd). Paul Eggert <eggert@cs.ucla.edu> parents: 7712 diff changeset	209 sync ();
064005e1c3c3 Prefer fd < 0 to ! (0 <= fd). Paul Eggert <eggert@cs.ucla.edu> parents: 7712 diff changeset	210 else
7712 aead3397193a * lib/utimens.c (futimens) [HAVE_BUGGY_NFS_TIME_STAMPS]: Add a Paul Eggert <eggert@cs.ucla.edu> parents: 7302 diff changeset	211 fsync (fd);
aead3397193a * lib/utimens.c (futimens) [HAVE_BUGGY_NFS_TIME_STAMPS]: Add a Paul Eggert <eggert@cs.ucla.edu> parents: 7302 diff changeset	212 #endif
aead3397193a * lib/utimens.c (futimens) [HAVE_BUGGY_NFS_TIME_STAMPS]: Add a Paul Eggert <eggert@cs.ucla.edu> parents: 7302 diff changeset	213
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	214 /* POSIX 2008 added two interfaces to set file timestamps with
12172 52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	215 nanosecond resolution; newer Linux implements both functions via
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	216 a single syscall. We provide a fallback for ENOSYS (for example,
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	217 compiling against Linux 2.6.25 kernel headers and glibc 2.7, but
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	218 running on Linux 2.6.18 kernel). */
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	219 #if HAVE_UTIMENSAT \|\| HAVE_FUTIMENS
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	220 if (0 <= utimensat_works_really)
10154 148190ed341d Provide futimens/utimensat fallbacks for older kernels. Eric Blake <ebb9@byu.net> parents: 10133 diff changeset	221 {
12467 912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	222 int result;
12525 53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	223 # if __linux__
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	224 /* As recently as Linux kernel 2.6.32 (Dec 2009), several file
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	225 systems (xfs, ntfs-3g) have bugs with a single UTIME_OMIT,
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	226 but work if both times are either explicitly specified or
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	227 UTIME_NOW. Work around it with a preparatory [f]stat prior
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	228 to calling futimens/utimensat; fortunately, there is not much
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	229 timing impact due to the extra syscall even on file systems
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	230 where UTIME_OMIT would have worked. FIXME: Simplify this in
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	231 2012, when file system bugs are no longer common. */
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	232 if (adjustment_needed == 2)
12467 912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	233 {
12525 53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	234 if (fd < 0 ? stat (file, &st) : fstat (fd, &st))
12467 912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	235 return -1;
912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	236 if (ts[0].tv_nsec == UTIME_OMIT)
12525 53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	237 ts[0] = get_stat_atime (&st);
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	238 else if (ts[1].tv_nsec == UTIME_OMIT)
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	239 ts[1] = get_stat_mtime (&st);
12554 0774f328f2ff utimens: avoid shadowing warning Eric Blake <ebb9@byu.net> parents: 12525 diff changeset	240 /* Note that st is good, in case utimensat gives ENOSYS. */
0774f328f2ff utimens: avoid shadowing warning Eric Blake <ebb9@byu.net> parents: 12525 diff changeset	241 adjustment_needed++;
12467 912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	242 }
12525 53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	243 # endif /* __linux__ */
12172 52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	244 # if HAVE_UTIMENSAT
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	245 if (fd < 0)
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	246 {
12467 912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	247 result = utimensat (AT_FDCWD, file, ts, 0);
12172 52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	248 # ifdef __linux__
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	249 /* Work around a kernel bug:
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	250 http://bugzilla.redhat.com/442352
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	251 http://bugzilla.redhat.com/449910
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	252 It appears that utimensat can mistakenly return 280 rather
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	253 than -1 upon ENOSYS failure.
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	254 FIXME: remove in 2010 or whenever the offending kernels
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	255 are no longer in common use. */
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	256 if (0 < result)
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	257 errno = ENOSYS;
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	258 # endif /* __linux__ */
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	259 if (result == 0 \|\| errno != ENOSYS)
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	260 {
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	261 utimensat_works_really = 1;
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	262 return result;
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	263 }
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	264 }
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	265 # endif /* HAVE_UTIMENSAT */
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	266 # if HAVE_FUTIMENS
12580 3a190157862b utimens (fdutimens): ignore a negative FD, per contract Aurelien Jarno <aurelien@aurel32.net> parents: 12559 diff changeset	267 if (0 <= fd)
3a190157862b utimens (fdutimens): ignore a negative FD, per contract Aurelien Jarno <aurelien@aurel32.net> parents: 12559 diff changeset	268 {
3a190157862b utimens (fdutimens): ignore a negative FD, per contract Aurelien Jarno <aurelien@aurel32.net> parents: 12559 diff changeset	269 result = futimens (fd, ts);
12172 52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	270 # ifdef __linux__
12580 3a190157862b utimens (fdutimens): ignore a negative FD, per contract Aurelien Jarno <aurelien@aurel32.net> parents: 12559 diff changeset	271 /* Work around the same bug as above. */
3a190157862b utimens (fdutimens): ignore a negative FD, per contract Aurelien Jarno <aurelien@aurel32.net> parents: 12559 diff changeset	272 if (0 < result)
3a190157862b utimens (fdutimens): ignore a negative FD, per contract Aurelien Jarno <aurelien@aurel32.net> parents: 12559 diff changeset	273 errno = ENOSYS;
12172 52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	274 # endif /* __linux__ */
12580 3a190157862b utimens (fdutimens): ignore a negative FD, per contract Aurelien Jarno <aurelien@aurel32.net> parents: 12559 diff changeset	275 if (result == 0 \|\| errno != ENOSYS)
3a190157862b utimens (fdutimens): ignore a negative FD, per contract Aurelien Jarno <aurelien@aurel32.net> parents: 12559 diff changeset	276 {
3a190157862b utimens (fdutimens): ignore a negative FD, per contract Aurelien Jarno <aurelien@aurel32.net> parents: 12559 diff changeset	277 utimensat_works_really = 1;
3a190157862b utimens (fdutimens): ignore a negative FD, per contract Aurelien Jarno <aurelien@aurel32.net> parents: 12559 diff changeset	278 return result;
3a190157862b utimens (fdutimens): ignore a negative FD, per contract Aurelien Jarno <aurelien@aurel32.net> parents: 12559 diff changeset	279 }
3a190157862b utimens (fdutimens): ignore a negative FD, per contract Aurelien Jarno <aurelien@aurel32.net> parents: 12559 diff changeset	280 }
12172 52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	281 # endif /* HAVE_FUTIMENS */
10154 148190ed341d Provide futimens/utimensat fallbacks for older kernels. Eric Blake <ebb9@byu.net> parents: 10133 diff changeset	282 }
12172 52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	283 utimensat_works_really = -1;
12353 fd066c132b7d utimens: work around older Linux failure with symlinks Eric Blake <ebb9@byu.net> parents: 12317 diff changeset	284 lutimensat_works_really = -1;
12172 52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	285 #endif /* HAVE_UTIMENSAT \|\| HAVE_FUTIMENS */
10133 bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	286
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	287 /* The platform lacks an interface to set file timestamps with
5147 3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	288 nanosecond resolution, so do the best we can, discarding any
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	289 fractional part of the timestamp. */
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	290
12194 16c7c4fa9754 utimensat: work around Solaris 9 bug Eric Blake <ebb9@byu.net> parents: 12174 diff changeset	291 if (adjustment_needed \|\| (REPLACE_FUNC_STAT_FILE && fd < 0))
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	292 {
12554 0774f328f2ff utimens: avoid shadowing warning Eric Blake <ebb9@byu.net> parents: 12525 diff changeset	293 if (adjustment_needed != 3
0774f328f2ff utimens: avoid shadowing warning Eric Blake <ebb9@byu.net> parents: 12525 diff changeset	294 && (fd < 0 ? stat (file, &st) : fstat (fd, &st)))
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	295 return -1;
12194 16c7c4fa9754 utimensat: work around Solaris 9 bug Eric Blake <ebb9@byu.net> parents: 12174 diff changeset	296 if (ts && update_timespec (&st, &ts))
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	297 return 0;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	298 }
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	299
6297 10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	300 {
10154 148190ed341d Provide futimens/utimensat fallbacks for older kernels. Eric Blake <ebb9@byu.net> parents: 10133 diff changeset	301 #if HAVE_FUTIMESAT \|\| HAVE_WORKING_UTIMES
10133 bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	302 struct timeval timeval[2];
13284 e08c8b78a796 utimens: avoid compiler warning Andreas Gruenbacher <agruen@suse.de> parents: 12580 diff changeset	303 struct timeval *t;
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	304 if (ts)
6297 10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	305 {
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	306 timeval[0].tv_sec = ts[0].tv_sec;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	307 timeval[0].tv_usec = ts[0].tv_nsec / 1000;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	308 timeval[1].tv_sec = ts[1].tv_sec;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	309 timeval[1].tv_usec = ts[1].tv_nsec / 1000;
12133 799664c0f270 openat, utimens: whitespace cleanup Eric Blake <ebb9@byu.net> parents: 11941 diff changeset	310 t = timeval;
10133 bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	311 }
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	312 else
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	313 t = NULL;
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	314
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	315 if (fd < 0)
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	316 {
10154 148190ed341d Provide futimens/utimensat fallbacks for older kernels. Eric Blake <ebb9@byu.net> parents: 10133 diff changeset	317 # if HAVE_FUTIMESAT
12133 799664c0f270 openat, utimens: whitespace cleanup Eric Blake <ebb9@byu.net> parents: 11941 diff changeset	318 return futimesat (AT_FDCWD, file, t);
10154 148190ed341d Provide futimens/utimensat fallbacks for older kernels. Eric Blake <ebb9@byu.net> parents: 10133 diff changeset	319 # endif
6297 10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	320 }
10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	321 else
10133 bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	322 {
12317 407921985bc0 utimens: fix regression on Solaris Eric Blake <ebb9@byu.net> parents: 12256 diff changeset	323 /* If futimesat or futimes fails here, don't try to speed things
407921985bc0 utimens: fix regression on Solaris Eric Blake <ebb9@byu.net> parents: 12256 diff changeset	324 up by returning right away. glibc can incorrectly fail with
407921985bc0 utimens: fix regression on Solaris Eric Blake <ebb9@byu.net> parents: 12256 diff changeset	325 errno == ENOENT if /proc isn't mounted. Also, Mandrake 10.0
12133 799664c0f270 openat, utimens: whitespace cleanup Eric Blake <ebb9@byu.net> parents: 11941 diff changeset	326 in high security mode doesn't allow ordinary users to read
799664c0f270 openat, utimens: whitespace cleanup Eric Blake <ebb9@byu.net> parents: 11941 diff changeset	327 /proc/self, so glibc incorrectly fails with errno == EACCES.
799664c0f270 openat, utimens: whitespace cleanup Eric Blake <ebb9@byu.net> parents: 11941 diff changeset	328 If errno == EIO, EPERM, or EROFS, it's probably safe to fail
799664c0f270 openat, utimens: whitespace cleanup Eric Blake <ebb9@byu.net> parents: 11941 diff changeset	329 right away, but these cases are rare enough that they're not
799664c0f270 openat, utimens: whitespace cleanup Eric Blake <ebb9@byu.net> parents: 11941 diff changeset	330 worth optimizing, and who knows what other messed-up systems
799664c0f270 openat, utimens: whitespace cleanup Eric Blake <ebb9@byu.net> parents: 11941 diff changeset	331 are out there? So play it safe and fall back on the code
799664c0f270 openat, utimens: whitespace cleanup Eric Blake <ebb9@byu.net> parents: 11941 diff changeset	332 below. */
14039 aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	333
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	334 # if (HAVE_FUTIMESAT && !FUTIMESAT_NULL_BUG) \|\| HAVE_FUTIMES
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	335 # if HAVE_FUTIMESAT && !FUTIMESAT_NULL_BUG
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	336 # undef futimes
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	337 # define futimes(fd, t) futimesat (fd, NULL, t)
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	338 # endif
12133 799664c0f270 openat, utimens: whitespace cleanup Eric Blake <ebb9@byu.net> parents: 11941 diff changeset	339 if (futimes (fd, t) == 0)
14039 aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	340 {
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	341 # if __linux__ && __GLIBC__ && ! HAVE_WORKING_UTIMES
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	342 /* Work around a longstanding glibc bug, still present as
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	343 of 2010-12-27. On older Linux kernels that lack both
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	344 utimensat and utimes, glibc's futimes rounds instead of
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	345 truncating when falling back on utime. The same bug
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	346 occurs in futimesat with a null 2nd arg. */
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	347 if (t)
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	348 {
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	349 bool abig = 500000 <= t[0].tv_usec;
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	350 bool mbig = 500000 <= t[1].tv_usec;
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	351 if ((abig \| mbig) && fstat (fd, &st) == 0)
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	352 {
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	353 /* If these two subtractions overflow, they'll
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	354 track the overflows inside the buggy glibc. */
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	355 time_t adiff = st.st_atime - t[0].tv_sec;
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	356 time_t mdiff = st.st_mtime - t[1].tv_sec;
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	357
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	358 struct timeval *tt = NULL;
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	359 struct timeval truncated_timeval[2];
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	360 truncated_timeval[0] = t[0];
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	361 truncated_timeval[1] = t[1];
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	362 if (abig && adiff == 1 && get_stat_atime_ns (&st) == 0)
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	363 {
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	364 tt = truncated_timeval;
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	365 tt[0].tv_usec = 0;
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	366 }
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	367 if (mbig && mdiff == 1 && get_stat_mtime_ns (&st) == 0)
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	368 {
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	369 tt = truncated_timeval;
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	370 tt[1].tv_usec = 0;
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	371 }
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	372 if (tt)
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	373 futimes (fd, tt);
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	374 }
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	375 }
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	376 # endif
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	377
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	378 return 0;
aeebba7a29c7 utimens: work around glibc rounding bug on older Linux kernels Paul Eggert <eggert@cs.ucla.edu> parents: 13696 diff changeset	379 }
10154 148190ed341d Provide futimens/utimensat fallbacks for older kernels. Eric Blake <ebb9@byu.net> parents: 10133 diff changeset	380 # endif
10133 bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	381 }
10154 148190ed341d Provide futimens/utimensat fallbacks for older kernels. Eric Blake <ebb9@byu.net> parents: 10133 diff changeset	382 #endif /* HAVE_FUTIMESAT \|\| HAVE_WORKING_UTIMES */
10133 bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	383
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	384 if (!file)
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	385 {
12317 407921985bc0 utimens: fix regression on Solaris Eric Blake <ebb9@byu.net> parents: 12256 diff changeset	386 #if ! ((HAVE_FUTIMESAT && !FUTIMESAT_NULL_BUG) \
407921985bc0 utimens: fix regression on Solaris Eric Blake <ebb9@byu.net> parents: 12256 diff changeset	387 \|\| (HAVE_WORKING_UTIMES && HAVE_FUTIMES))
12133 799664c0f270 openat, utimens: whitespace cleanup Eric Blake <ebb9@byu.net> parents: 11941 diff changeset	388 errno = ENOSYS;
10154 148190ed341d Provide futimens/utimensat fallbacks for older kernels. Eric Blake <ebb9@byu.net> parents: 10133 diff changeset	389 #endif
12133 799664c0f270 openat, utimens: whitespace cleanup Eric Blake <ebb9@byu.net> parents: 11941 diff changeset	390 return -1;
10133 bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	391 }
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	392
10154 148190ed341d Provide futimens/utimensat fallbacks for older kernels. Eric Blake <ebb9@byu.net> parents: 10133 diff changeset	393 #if HAVE_WORKING_UTIMES
10133 bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	394 return utimes (file, t);
10154 148190ed341d Provide futimens/utimensat fallbacks for older kernels. Eric Blake <ebb9@byu.net> parents: 10133 diff changeset	395 #else
10133 bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	396 {
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	397 struct utimbuf utimbuf;
12157 7fb8a2ac5948 utimens: validate futimens usage Eric Blake <ebb9@byu.net> parents: 12134 diff changeset	398 struct utimbuf *ut;
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	399 if (ts)
12133 799664c0f270 openat, utimens: whitespace cleanup Eric Blake <ebb9@byu.net> parents: 11941 diff changeset	400 {
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	401 utimbuf.actime = ts[0].tv_sec;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	402 utimbuf.modtime = ts[1].tv_sec;
12133 799664c0f270 openat, utimens: whitespace cleanup Eric Blake <ebb9@byu.net> parents: 11941 diff changeset	403 ut = &utimbuf;
799664c0f270 openat, utimens: whitespace cleanup Eric Blake <ebb9@byu.net> parents: 11941 diff changeset	404 }
10133 bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	405 else
12133 799664c0f270 openat, utimens: whitespace cleanup Eric Blake <ebb9@byu.net> parents: 11941 diff changeset	406 ut = NULL;
10133 bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	407
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	408 return utime (file, ut);
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	409 }
10154 148190ed341d Provide futimens/utimensat fallbacks for older kernels. Eric Blake <ebb9@byu.net> parents: 10133 diff changeset	410 #endif /* !HAVE_WORKING_UTIMES */
6297 10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	411 }
5147 3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	412 }
5485 863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	413
863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	414 /* Set the access and modification time stamps of FILE to be
863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	415 TIMESPEC[0] and TIMESPEC[1], respectively. */
863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	416 int
863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	417 utimens (char const *file, struct timespec const timespec[2])
863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	418 {
13696 bfe487360d66 fdutimens, fdutimensat: update signature, again Eric Blake <eblake@redhat.com> parents: 13284 diff changeset	419 return fdutimens (-1, file, timespec);
5485 863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	420 }
12158 899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	421
12173 efdb2ab5743f utimens: let lutimens work on non-symlinks Eric Blake <ebb9@byu.net> parents: 12172 diff changeset	422 /* Set the access and modification time stamps of FILE to be
efdb2ab5743f utimens: let lutimens work on non-symlinks Eric Blake <ebb9@byu.net> parents: 12172 diff changeset	423 TIMESPEC[0] and TIMESPEC[1], respectively, without dereferencing
efdb2ab5743f utimens: let lutimens work on non-symlinks Eric Blake <ebb9@byu.net> parents: 12172 diff changeset	424 symlinks. Fail with ENOSYS if the platform does not support
efdb2ab5743f utimens: let lutimens work on non-symlinks Eric Blake <ebb9@byu.net> parents: 12172 diff changeset	425 changing symlink timestamps, but FILE was a symlink. */
12158 899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	426 int
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	427 lutimens (char const *file, struct timespec const timespec[2])
12158 899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	428 {
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	429 struct timespec adjusted_timespec[2];
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	430 struct timespec *ts = timespec ? adjusted_timespec : NULL;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	431 int adjustment_needed = 0;
12173 efdb2ab5743f utimens: let lutimens work on non-symlinks Eric Blake <ebb9@byu.net> parents: 12172 diff changeset	432 struct stat st;
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	433
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	434 if (ts)
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	435 {
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	436 adjusted_timespec[0] = timespec[0];
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	437 adjusted_timespec[1] = timespec[1];
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	438 adjustment_needed = validate_timespec (ts);
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	439 }
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	440 if (adjustment_needed < 0)
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	441 return -1;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	442
12158 899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	443 /* The Linux kernel did not support symlink timestamps until
899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	444 utimensat, in version 2.6.22, so we don't need to mimic
13696 bfe487360d66 fdutimens, fdutimensat: update signature, again Eric Blake <eblake@redhat.com> parents: 13284 diff changeset	445 fdutimens' worry about buggy NFS clients. But we do have to
12158 899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	446 worry about bogus return values. */
899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	447
899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	448 #if HAVE_UTIMENSAT
12353 fd066c132b7d utimens: work around older Linux failure with symlinks Eric Blake <ebb9@byu.net> parents: 12317 diff changeset	449 if (0 <= lutimensat_works_really)
12172 52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	450 {
12467 912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	451 int result;
12525 53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	452 # if __linux__
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	453 /* As recently as Linux kernel 2.6.32 (Dec 2009), several file
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	454 systems (xfs, ntfs-3g) have bugs with a single UTIME_OMIT,
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	455 but work if both times are either explicitly specified or
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	456 UTIME_NOW. Work around it with a preparatory lstat prior to
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	457 calling utimensat; fortunately, there is not much timing
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	458 impact due to the extra syscall even on file systems where
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	459 UTIME_OMIT would have worked. FIXME: Simplify this in 2012,
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	460 when file system bugs are no longer common. */
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	461 if (adjustment_needed == 2)
12467 912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	462 {
12525 53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	463 if (lstat (file, &st))
12467 912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	464 return -1;
912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	465 if (ts[0].tv_nsec == UTIME_OMIT)
12525 53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	466 ts[0] = get_stat_atime (&st);
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	467 else if (ts[1].tv_nsec == UTIME_OMIT)
53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	468 ts[1] = get_stat_mtime (&st);
12554 0774f328f2ff utimens: avoid shadowing warning Eric Blake <ebb9@byu.net> parents: 12525 diff changeset	469 /* Note that st is good, in case utimensat gives ENOSYS. */
0774f328f2ff utimens: avoid shadowing warning Eric Blake <ebb9@byu.net> parents: 12525 diff changeset	470 adjustment_needed++;
12467 912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	471 }
12525 53f80a530574 futimens, utimensat: work around ntfs-3g bug Eric Blake <ebb9@byu.net> parents: 12518 diff changeset	472 # endif /* __linux__ */
12467 912bdb1c31fb utimens: work around Linux ctime bug Eric Blake <ebb9@byu.net> parents: 12447 diff changeset	473 result = utimensat (AT_FDCWD, file, ts, AT_SYMLINK_NOFOLLOW);
12158 899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	474 # ifdef __linux__
12172 52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	475 /* Work around a kernel bug:
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	476 http://bugzilla.redhat.com/442352
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	477 http://bugzilla.redhat.com/449910
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	478 It appears that utimensat can mistakenly return 280 rather
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	479 than -1 upon ENOSYS failure.
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	480 FIXME: remove in 2010 or whenever the offending kernels
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	481 are no longer in common use. */
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	482 if (0 < result)
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	483 errno = ENOSYS;
12158 899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	484 # endif
12172 52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	485 if (result == 0 \|\| errno != ENOSYS)
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	486 {
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	487 utimensat_works_really = 1;
12353 fd066c132b7d utimens: work around older Linux failure with symlinks Eric Blake <ebb9@byu.net> parents: 12317 diff changeset	488 lutimensat_works_really = 1;
12172 52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	489 return result;
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	490 }
52ebfd595434 utimens: cache whether utimensat syscall works Eric Blake <ebb9@byu.net> parents: 12162 diff changeset	491 }
12353 fd066c132b7d utimens: work around older Linux failure with symlinks Eric Blake <ebb9@byu.net> parents: 12317 diff changeset	492 lutimensat_works_really = -1;
12158 899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	493 #endif /* HAVE_UTIMENSAT */
899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	494
899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	495 /* The platform lacks an interface to set file timestamps with
899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	496 nanosecond resolution, so do the best we can, discarding any
899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	497 fractional part of the timestamp. */
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	498
12194 16c7c4fa9754 utimensat: work around Solaris 9 bug Eric Blake <ebb9@byu.net> parents: 12174 diff changeset	499 if (adjustment_needed \|\| REPLACE_FUNC_STAT_FILE)
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	500 {
12554 0774f328f2ff utimens: avoid shadowing warning Eric Blake <ebb9@byu.net> parents: 12525 diff changeset	501 if (adjustment_needed != 3 && lstat (file, &st))
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	502 return -1;
12194 16c7c4fa9754 utimensat: work around Solaris 9 bug Eric Blake <ebb9@byu.net> parents: 12174 diff changeset	503 if (ts && update_timespec (&st, &ts))
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	504 return 0;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	505 }
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	506
12353 fd066c132b7d utimens: work around older Linux failure with symlinks Eric Blake <ebb9@byu.net> parents: 12317 diff changeset	507 /* On Linux, lutimes is a thin wrapper around utimensat, so there is
fd066c132b7d utimens: work around older Linux failure with symlinks Eric Blake <ebb9@byu.net> parents: 12317 diff changeset	508 no point trying lutimes if utimensat failed with ENOSYS. */
fd066c132b7d utimens: work around older Linux failure with symlinks Eric Blake <ebb9@byu.net> parents: 12317 diff changeset	509 #if HAVE_LUTIMES && !HAVE_UTIMENSAT
12158 899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	510 {
899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	511 struct timeval timeval[2];
13284 e08c8b78a796 utimens: avoid compiler warning Andreas Gruenbacher <agruen@suse.de> parents: 12580 diff changeset	512 struct timeval *t;
12447 b79168ca6a08 utimens: one more try at avoiding compiler warning Eric Blake <ebb9@byu.net> parents: 12377 diff changeset	513 int result;
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	514 if (ts)
12158 899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	515 {
12160 d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	516 timeval[0].tv_sec = ts[0].tv_sec;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	517 timeval[0].tv_usec = ts[0].tv_nsec / 1000;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	518 timeval[1].tv_sec = ts[1].tv_sec;
d0732ed2dd55 utimens: add UTIME_NOW and UTIME_OMIT support Eric Blake <ebb9@byu.net> parents: 12158 diff changeset	519 timeval[1].tv_usec = ts[1].tv_nsec / 1000;
12158 899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	520 t = timeval;
899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	521 }
899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	522 else
899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	523 t = NULL;
899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	524
12353 fd066c132b7d utimens: work around older Linux failure with symlinks Eric Blake <ebb9@byu.net> parents: 12317 diff changeset	525 result = lutimes (file, t);
fd066c132b7d utimens: work around older Linux failure with symlinks Eric Blake <ebb9@byu.net> parents: 12317 diff changeset	526 if (result == 0 \|\| errno != ENOSYS)
fd066c132b7d utimens: work around older Linux failure with symlinks Eric Blake <ebb9@byu.net> parents: 12317 diff changeset	527 return result;
12158 899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	528 }
12353 fd066c132b7d utimens: work around older Linux failure with symlinks Eric Blake <ebb9@byu.net> parents: 12317 diff changeset	529 #endif /* HAVE_LUTIMES && !HAVE_UTIMENSAT */
12158 899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	530
12173 efdb2ab5743f utimens: let lutimens work on non-symlinks Eric Blake <ebb9@byu.net> parents: 12172 diff changeset	531 /* Out of luck for symlinks, but we still handle regular files. */
12194 16c7c4fa9754 utimensat: work around Solaris 9 bug Eric Blake <ebb9@byu.net> parents: 12174 diff changeset	532 if (!(adjustment_needed \|\| REPLACE_FUNC_STAT_FILE) && lstat (file, &st))
12173 efdb2ab5743f utimens: let lutimens work on non-symlinks Eric Blake <ebb9@byu.net> parents: 12172 diff changeset	533 return -1;
efdb2ab5743f utimens: let lutimens work on non-symlinks Eric Blake <ebb9@byu.net> parents: 12172 diff changeset	534 if (!S_ISLNK (st.st_mode))
13696 bfe487360d66 fdutimens, fdutimensat: update signature, again Eric Blake <eblake@redhat.com> parents: 13284 diff changeset	535 return fdutimens (-1, file, ts);
12158 899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	536 errno = ENOSYS;
899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	537 return -1;
899dd13e9f8b utimens: add lutimens interface Eric Blake <ebb9@byu.net> parents: 12157 diff changeset	538 }

Mercurial > hg > octave-nkf > gnulib-hg

annotate lib/utimens.c @ 14039:aeebba7a29c7