1 /* Copyright (C) 1998, 2001, 2002, 2003, 2004, 2006 Free Software
4 This program is free software; you can redistribute it and/or modify it
5 under the terms of the GNU General Public License as published by the
6 Free Software Foundation; either version 2, or (at your option) any
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
18 /* derived from a function in touch.c */
23 #include <sys/types.h>
30 # include <sys/stat.h>
37 #include "full-write.h"
38 #include "safe-read.h"
40 /* Some systems (even some that do have <utime.h>) don't declare this
41 structure anywhere. */
42 #ifndef HAVE_STRUCT_UTIMBUF
50 /* Emulate utime (file, NULL) for systems (like 4.3BSD) that do not
51 interpret it to set the access and modification times of FILE to
52 the current time. Return 0 if successful, -1 if not. */
55 utime_null (const char *file)
58 return utimes (file, 0);
66 fd = open (file, O_RDWR);
68 || fstat (fd, &st) < 0
69 || safe_read (fd, &c, sizeof c) == SAFE_READ_ERROR
70 || lseek (fd, (off_t) 0, SEEK_SET) < 0
71 || full_write (fd, &c, sizeof c) != sizeof c
72 /* Maybe do this -- it's necessary on SunOS 4.1.3 with some combination
73 of patches, but that system doesn't use this code: it has utimes.
76 || (st.st_size == 0 && ftruncate (fd, st.st_size) < 0))
87 /* If there was a prior failure, use the saved errno value.
88 But if the only failure was in the close, don't change errno. */
98 rpl_utime (const char *file, const struct utimbuf *times)
101 return utime (file, times);
103 return utime_null (file);