-/* Copyright (C) 1998 Free Software Foundation, Inc.
+/* Copyright (C) 1998, 2001, 2002, 2003 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
# include <utime.h>
#endif
+#if !HAVE_UTIMES_NULL
+# include <sys/stat.h>
+# include <fcntl.h>
+#endif
+
+#include <unistd.h>
+#include <errno.h>
+#ifndef errno
+extern int errno;
+#endif
+
+#include "full-write.h"
#include "safe-read.h"
/* Some systems (even some that do have <utime.h>) don't declare this
int fd;
char c;
int status = 0;
- struct stat sb;
+ struct stat st;
+ int saved_errno = 0;
fd = open (file, O_RDWR);
if (fd < 0
- || fstat (fd, &sb) < 0
- || safe_read (fd, &c, sizeof (char)) < 0
+ || fstat (fd, &st) < 0
+ || safe_read (fd, &c, sizeof c) == SAFE_READ_ERROR
|| 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
+ || full_write (fd, &c, sizeof c) != sizeof c
+ /* Maybe do this -- it's necessary on SunOS 4.1.3 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;
+ || (st.st_size == 0 && ftruncate (fd, st.st_size) < 0))
+ {
+ saved_errno = errno;
+ status = -1;
+ }
+
+ if (0 <= fd)
+ {
+ if (close (fd) < 0)
+ status = -1;
+
+ /* If there was a prior failure, use the saved errno value.
+ But if the only failure was in the close, don't change errno. */
+ if (saved_errno)
+ errno = saved_errno;
+ }
+
return status;
#endif
}