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authorJim Meyering <jim@meyering.net>1998-07-25 13:48:45 +0000
committerJim Meyering <jim@meyering.net>1998-07-25 13:48:45 +0000
commit240b9c0f89a89e7a5868669eb9b887e7d7c430c9 (patch)
treecc42498d4e18df15e0311d14cf30ae3485348e60 /lib
parentfc13bb65df0b23e8b93d893a6e99aa5c447a5910 (diff)
downloadcoreutils-240b9c0f89a89e7a5868669eb9b887e7d7c430c9.tar.xz
.
Diffstat (limited to 'lib')
-rw-r--r--lib/utime.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/lib/utime.c b/lib/utime.c
new file mode 100644
index 000000000..557444c0d
--- /dev/null
+++ b/lib/utime.c
@@ -0,0 +1,81 @@
+/* Copyright (C) 1998 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by the
+ Free Software Foundation; either version 2, or (at your option) any
+ later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+/* derived from a function in touch.c */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+#undef utime
+
+#include <sys/types.h>
+
+#ifdef HAVE_UTIME_H
+# include <utime.h>
+#endif
+
+#include "safe-read.h"
+
+/* Some systems (even some that do have <utime.h>) don't declare this
+ structure anywhere. */
+#ifndef HAVE_STRUCT_UTIMBUF
+struct utimbuf
+{
+ long actime;
+ long modtime;
+};
+#endif
+
+/* Emulate utime (file, NULL) for systems (like 4.3BSD) that do not
+ interpret it to set the access and modification times of FILE to
+ the current time. Return 0 if successful, -1 if not. */
+
+static int
+utime_null (const char *file)
+{
+#if HAVE_UTIMES_NULL
+ return utimes (file, 0);
+#else
+ int fd;
+ char c;
+ int status = 0;
+ struct stat sb;
+
+ fd = open (file, O_RDWR, 0666);
+ if (fd < 0
+ || fstat (fd, &sb) < 0
+ || safe_read (fd, &c, sizeof (char)) < 0
+ || lseek (fd, (off_t) 0, SEEK_SET) < 0
+ || full_write (fd, &c, sizeof (char)) < 0
+ /* Maybe do this -- it's necessary on SunOS4.1.3 with some combination
+ of patches, but that system doesn't use this code: it has utimes.
+ || fsync (fd) < 0
+ */
+ || ftruncate (fd, st.st_size) < 0
+ || close (fd) < 0)
+ status = -1;
+ return status;
+#endif
+}
+
+int
+rpl_utime (const char *file, const struct utimbuf *times)
+{
+ if (times)
+ return utime (file, times);
+
+ return utime_null (file);
+}