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

annotate lib/utimens.c @ 10133:bbccff5988c3

Prefer new POSIX 200x interfaces over futimesat. * m4/utimens.m4 (gl_UTIMENS): Check for futimens, utimensat. * lib/utimens.c (gl_futimens): Use them for nanosecond resolution when available. [HAVE_BUGGY_NFS_TIME_STAMPS]: Allow C89 compilation. Signed-off-by: Eric Blake <ebb9@byu.net>

author	Eric Blake <ebb9@byu.net>
date	Wed, 28 May 2008 21:29:02 -0600
parents	c4fa39bf5223
children	148190ed341d

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
9613 c4fa39bf5223 Don't redefine __attribute__ without a need. Bruno Haible <bruno@clisp.org> parents: 9309 diff changeset	3 Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Free Software
7897 b7a83a69ac23 * MODULES.html.sh (Support for systems lacking POSIX:2001): New Paul Eggert <eggert@cs.ucla.edu> parents: 7713 diff changeset	4 Foundation, Inc.
5147 3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	5
9309 bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+. Bruno Haible <bruno@clisp.org> parents: 8842 diff changeset	6 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	7 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	8 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	9 later version.
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	10
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	11 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	12 but WITHOUT ANY WARRANTY; without even the implied warranty of
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	14 GNU General Public License for more details.
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	15
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	16 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	17 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	18
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	19 /* Written by Paul Eggert. */
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	20
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	21 /* derived from a function in touch.c */
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	22
7302 8a1a9361108c * _fpending.c: Include <config.h> unconditionally, since we no Paul Eggert <eggert@cs.ucla.edu> parents: 6819 diff changeset	23 #include <config.h>
5147 3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	24
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	25 #include "utimens.h"
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	26
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>
10133 bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	29 #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	30 #include <sys/time.h>
6322 716071856296 Sync from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 6297 diff changeset	31 #include <unistd.h>
5589 6ddb405e16b6 (futimens): Account for the fact that futimes Paul Eggert <eggert@cs.ucla.edu> parents: 5485 diff changeset	32
5147 3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	33 #if HAVE_UTIME_H
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	34 # include <utime.h>
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	35 #endif
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	36
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	37 /* 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	38 structure anywhere. */
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	39 #ifndef HAVE_STRUCT_UTIMBUF
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	40 struct utimbuf
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	41 {
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	42 long actime;
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	43 long modtime;
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	44 };
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	45 #endif
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	46
6297 10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	47 /* Some systems don't have ENOSYS. */
10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	48 #ifndef ENOSYS
10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	49 # ifdef ENOTSUP
10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	50 # define ENOSYS ENOTSUP
10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	51 # else
10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	52 /* Some systems don't have ENOTSUP either. */
10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	53 # define ENOSYS EINVAL
10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	54 # endif
10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	55 #endif
10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	56
6819 3449832bdc37 * getdate.y (__attribute__): Don't define if already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6734 diff changeset	57 #ifndef __attribute__
9613 c4fa39bf5223 Don't redefine __attribute__ without a need. Bruno Haible <bruno@clisp.org> parents: 9309 diff changeset	58 # if __GNUC__ < 2 \|\| (__GNUC__ == 2 && __GNUC_MINOR__ < 8)
6819 3449832bdc37 * getdate.y (__attribute__): Don't define if already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6734 diff changeset	59 # define __attribute__(x)
3449832bdc37 * getdate.y (__attribute__): Don't define if already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6734 diff changeset	60 # endif
5485 863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	61 #endif
863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	62
863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	63 #ifndef ATTRIBUTE_UNUSED
863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	64 # define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	65 #endif
863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	66
863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	67 /* 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	68 TIMESPEC[0] and TIMESPEC[1], respectively.
863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	69 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	70 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	71 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	72 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	73 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	74 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	75 Return 0 on success, -1 (setting errno) on failure. */
5147 3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	76
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	77 int
8842 7605663b153e * lib/utimens.c (gl_futimens): Rename from futimens, Jim Meyering <jim@meyering.net> parents: 7897 diff changeset	78 gl_futimens (int fd ATTRIBUTE_UNUSED,
7605663b153e * lib/utimens.c (gl_futimens): Rename from futimens, Jim Meyering <jim@meyering.net> parents: 7897 diff changeset	79 char const *file, struct timespec const timespec[2])
5147 3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	80 {
7712 aead3397193a * lib/utimens.c (futimens) [HAVE_BUGGY_NFS_TIME_STAMPS]: Add a Paul Eggert <eggert@cs.ucla.edu> parents: 7302 diff changeset	81 /* 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	82 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	83 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	84 <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	85 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	86 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	87 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	88 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	89 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	90
aead3397193a * lib/utimens.c (futimens) [HAVE_BUGGY_NFS_TIME_STAMPS]: Add a Paul Eggert <eggert@cs.ucla.edu> parents: 7302 diff changeset	91 #if HAVE_BUGGY_NFS_TIME_STAMPS
7713 064005e1c3c3 Prefer fd < 0 to ! (0 <= fd). Paul Eggert <eggert@cs.ucla.edu> parents: 7712 diff changeset	92 if (fd < 0)
064005e1c3c3 Prefer fd < 0 to ! (0 <= fd). Paul Eggert <eggert@cs.ucla.edu> parents: 7712 diff changeset	93 sync ();
064005e1c3c3 Prefer fd < 0 to ! (0 <= fd). Paul Eggert <eggert@cs.ucla.edu> parents: 7712 diff changeset	94 else
7712 aead3397193a * lib/utimens.c (futimens) [HAVE_BUGGY_NFS_TIME_STAMPS]: Add a Paul Eggert <eggert@cs.ucla.edu> parents: 7302 diff changeset	95 fsync (fd);
aead3397193a * lib/utimens.c (futimens) [HAVE_BUGGY_NFS_TIME_STAMPS]: Add a Paul Eggert <eggert@cs.ucla.edu> parents: 7302 diff changeset	96 #endif
aead3397193a * lib/utimens.c (futimens) [HAVE_BUGGY_NFS_TIME_STAMPS]: Add a Paul Eggert <eggert@cs.ucla.edu> parents: 7302 diff changeset	97
10133 bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	98 /* POSIX 200x added two interfaces to set file timestamps with
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	99 nanosecond resolution. */
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	100 #if HAVE_UTIMENSAT
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	101 if (fd < 0)
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	102 return utimensat (AT_FDCWD, file, timespec, 0);
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	103 #endif
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	104 #if HAVE_FUTIMENS
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	105 return futimens (fd, timespec);
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	106 #else
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	107
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	108 /* The platform lacks an interface to set file timestamps with
5147 3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	109 nanosecond resolution, so do the best we can, discarding any
3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	110 fractional part of the timestamp. */
6297 10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	111 {
10133 bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	112 # if HAVE_FUTIMESAT \|\| HAVE_WORKING_UTIMES
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	113 struct timeval timeval[2];
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	114 struct timeval const *t;
6297 10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	115 if (timespec)
10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	116 {
10133 bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	117 timeval[0].tv_sec = timespec[0].tv_sec;
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	118 timeval[0].tv_usec = timespec[0].tv_nsec / 1000;
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	119 timeval[1].tv_sec = timespec[1].tv_sec;
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	120 timeval[1].tv_usec = timespec[1].tv_nsec / 1000;
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	121 t = timeval;
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	122 }
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	123 else
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	124 t = NULL;
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	125
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	126 if (fd < 0)
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	127 {
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	128 # if HAVE_FUTIMESAT
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	129 return futimesat (AT_FDCWD, file, t);
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	130 # endif
6297 10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	131 }
10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	132 else
10133 bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	133 {
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	134 /* If futimesat or futimes fails here, don't try to speed things
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	135 up by returning right away. glibc can incorrectly fail with
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	136 errno == ENOENT if /proc isn't mounted. Also, Mandrake 10.0
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	137 in high security mode doesn't allow ordinary users to read
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	138 /proc/self, so glibc incorrectly fails with errno == EACCES.
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	139 If errno == EIO, EPERM, or EROFS, it's probably safe to fail
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	140 right away, but these cases are rare enough that they're not
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	141 worth optimizing, and who knows what other messed-up systems
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	142 are out there? So play it safe and fall back on the code
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	143 below. */
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	144 # if HAVE_FUTIMESAT
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	145 if (futimesat (fd, NULL, t) == 0)
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	146 return 0;
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	147 # elif HAVE_FUTIMES
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	148 if (futimes (fd, t) == 0)
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	149 return 0;
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	150 # endif
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	151 }
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	152 # endif /* HAVE_FUTIMESAT \|\| HAVE_WORKING_UTIMES */
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	153
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	154 if (!file)
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	155 {
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	156 # if ! (HAVE_FUTIMESAT \|\| (HAVE_WORKING_UTIMES && HAVE_FUTIMES))
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	157 errno = ENOSYS;
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	158 # endif
6297 10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	159
10133 bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	160 /* Prefer EBADF to ENOSYS if both error numbers apply. */
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	161 if (errno == ENOSYS)
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	162 {
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	163 int fd2 = dup (fd);
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	164 int dup_errno = errno;
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	165 if (0 <= fd2)
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	166 close (fd2);
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	167 errno = (fd2 < 0 && dup_errno == EBADF ? EBADF : ENOSYS);
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	168 }
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	169
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	170 return -1;
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	171 }
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	172
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	173 # if HAVE_WORKING_UTIMES
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	174 return utimes (file, t);
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	175 # else
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	176 {
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	177 struct utimbuf utimbuf;
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	178 struct utimbuf const *ut;
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	179 if (timespec)
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	180 {
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	181 utimbuf.actime = timespec[0].tv_sec;
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	182 utimbuf.modtime = timespec[1].tv_sec;
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	183 ut = &utimbuf;
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	184 }
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	185 else
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	186 ut = NULL;
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	187
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	188 return utime (file, ut);
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	189 }
bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	190 # endif /* !HAVE_WORKING_UTIMES */
6297 10379892281e * utimens.c (ENOSYS): Define if not already defined. Paul Eggert <eggert@cs.ucla.edu> parents: 6283 diff changeset	191 }
10133 bbccff5988c3 Prefer new POSIX 200x interfaces over futimesat. Eric Blake <ebb9@byu.net> parents: 9613 diff changeset	192 #endif /* !HAVE_FUTIMENS */
5147 3249aec7f48c Import from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	193 }
5485 863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	194
863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	195 /* 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	196 TIMESPEC[0] and TIMESPEC[1], respectively. */
863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	197 int
863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	198 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	199 {
8842 7605663b153e * lib/utimens.c (gl_futimens): Rename from futimens, Jim Meyering <jim@meyering.net> parents: 7897 diff changeset	200 return gl_futimens (-1, file, timespec);
5485 863556283cee (__attribute__, ATTRIBUTE_UNUSED): New macros. Paul Eggert <eggert@cs.ucla.edu> parents: 5147 diff changeset	201 }

Mercurial > hg > octave-shane > gnulib-hg

annotate lib/utimens.c @ 10133:bbccff5988c3