1 /* Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
3 This program is free software; you can redistribute it and/or modify it
4 under the terms of the GNU General Public License as published by the
5 Free Software Foundation; either version 2, or (at your option) any
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
13 You should have received a copy of the GNU General Public License
14 along with this program; if not, write to the Free Software Foundation,
15 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
17 /* Written by Paul Eggert. */
19 /* derived from a function in touch.c */
34 /* Some systems (even some that do have <utime.h>) don't declare this
35 structure anywhere. */
36 #ifndef HAVE_STRUCT_UTIMBUF
44 /* Some systems don't have ENOSYS. */
47 # define ENOSYS ENOTSUP
49 /* Some systems don't have ENOTSUP either. */
50 # define ENOSYS EINVAL
54 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) || __STRICT_ANSI__
55 # define __attribute__(x)
58 #ifndef ATTRIBUTE_UNUSED
59 # define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
62 /* Set the access and modification time stamps of FD (a.k.a. FILE) to be
63 TIMESPEC[0] and TIMESPEC[1], respectively.
64 FD must be either negative -- in which case it is ignored --
65 or a file descriptor that is open on FILE.
66 If FD is nonnegative, then FILE can be NULL, which means
67 use just futimes (or equivalent) instead of utimes (or equivalent),
68 and fail if on an old system without futimes (or equivalent).
69 If TIMESPEC is null, set the time stamps to the current time.
70 Return 0 on success, -1 (setting errno) on failure. */
73 futimens (int fd ATTRIBUTE_UNUSED,
74 char const *file, struct timespec const timespec[2])
76 /* There's currently no interface to set file timestamps with
77 nanosecond resolution, so do the best we can, discarding any
78 fractional part of the timestamp. */
79 #if HAVE_FUTIMESAT || HAVE_WORKING_UTIMES
80 struct timeval timeval[2];
81 struct timeval const *t;
84 timeval[0].tv_sec = timespec[0].tv_sec;
85 timeval[0].tv_usec = timespec[0].tv_nsec / 1000;
86 timeval[1].tv_sec = timespec[1].tv_sec;
87 timeval[1].tv_usec = timespec[1].tv_nsec / 1000;
94 return fd < 0 ? futimesat (AT_FDCWD, file, t) : futimesat (fd, NULL, t);
98 if (futimes (fd, t) == 0)
101 /* On GNU/Linux without the futimes syscall and without /proc
102 mounted, glibc futimes fails with errno == ENOENT. Fall back
103 on utimes if we get a weird error number like that. */
116 #if ! HAVE_FUTIMES_AT
124 # if HAVE_WORKING_UTIMES
125 return utimes (file, t);
128 struct utimbuf utimbuf;
129 struct utimbuf const *ut;
132 utimbuf.actime = timespec[0].tv_sec;
133 utimbuf.modtime = timespec[1].tv_sec;
139 return utime (file, ut);
146 /* Set the access and modification time stamps of FILE to be
147 TIMESPEC[0] and TIMESPEC[1], respectively. */
149 utimens (char const *file, struct timespec const timespec[2])
151 return futimens (-1, file, timespec);