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 */
35 /* Some systems (even some that do have <utime.h>) don't declare this
36 structure anywhere. */
37 #ifndef HAVE_STRUCT_UTIMBUF
45 /* Some systems don't have ENOSYS. */
48 # define ENOSYS ENOTSUP
50 /* Some systems don't have ENOTSUP either. */
51 # define ENOSYS EINVAL
55 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) || __STRICT_ANSI__
56 # define __attribute__(x)
59 #ifndef ATTRIBUTE_UNUSED
60 # define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
63 /* Set the access and modification time stamps of FD (a.k.a. FILE) to be
64 TIMESPEC[0] and TIMESPEC[1], respectively.
65 FD must be either negative -- in which case it is ignored --
66 or a file descriptor that is open on FILE.
67 If FD is nonnegative, then FILE can be NULL, which means
68 use just futimes (or equivalent) instead of utimes (or equivalent),
69 and fail if on an old system without futimes (or equivalent).
70 If TIMESPEC is null, set the time stamps to the current time.
71 Return 0 on success, -1 (setting errno) on failure. */
74 futimens (int fd ATTRIBUTE_UNUSED,
75 char const *file, struct timespec const timespec[2])
77 /* There's currently no interface to set file timestamps with
78 nanosecond resolution, so do the best we can, discarding any
79 fractional part of the timestamp. */
80 #if HAVE_FUTIMESAT || HAVE_WORKING_UTIMES
81 struct timeval timeval[2];
82 struct timeval const *t;
85 timeval[0].tv_sec = timespec[0].tv_sec;
86 timeval[0].tv_usec = timespec[0].tv_nsec / 1000;
87 timeval[1].tv_sec = timespec[1].tv_sec;
88 timeval[1].tv_usec = timespec[1].tv_nsec / 1000;
95 return fd < 0 ? futimesat (AT_FDCWD, file, t) : futimesat (fd, NULL, t);
99 if (futimes (fd, t) == 0)
102 /* Don't worry about trying to speed things up by returning right
103 away here. glibc futimes can incorrectly fail with errno ==
104 ENOENT if /proc isn't mounted. Also, Mandrake 10.0 in high
105 security mode doesn't allow ordinary users to read /proc/self, so
106 glibc futimes incorrectly fails with errno == EACCES. If futimes
107 fails with errno == EIO, EPERM, or EROFS, it's probably safe to
108 fail right away, but these cases are rare enough that they're not
109 worth optimizing, and who knows what other messed-up systems are
110 out there? So play it safe and fall back on the code below. */
119 # if ! (HAVE_WORKING_UTIMES && HAVE_FUTIMES)
123 /* Prefer EBADF to ENOSYS if both error numbers apply. */
127 int dup_errno = errno;
130 errno = (fd2 < 0 && dup_errno == EBADF ? EBADF : ENOSYS);
136 # if HAVE_WORKING_UTIMES
137 return utimes (file, t);
140 struct utimbuf utimbuf;
141 struct utimbuf const *ut;
144 utimbuf.actime = timespec[0].tv_sec;
145 utimbuf.modtime = timespec[1].tv_sec;
151 return utime (file, ut);
158 /* Set the access and modification time stamps of FILE to be
159 TIMESPEC[0] and TIMESPEC[1], respectively. */
161 utimens (char const *file, struct timespec const timespec[2])
163 return futimens (-1, file, timespec);