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-rw-r--r--m4/utimes.m483
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diff --git a/m4/utimes.m4 b/m4/utimes.m4
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-# Detect some bugs in glibc's implementation of utimes.
-
-dnl Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-# See if we need to work around bugs in glibc's implementation of
-# utimes from 2003-07-12 to 2003-09-17.
-# First, there was a bug that would make utimes set mtime
-# and atime to zero (1970-01-01) unconditionally.
-# Then, there was code to round rather than truncate.
-# Then, there was an implementation (sparc64, Linux-2.4.28, glibc-2.3.3)
-# that didn't honor the NULL-means-set-to-current-time semantics.
-# Finally, there was also a version of utimes that failed on read-only
-# files, while utime worked fine (linux-2.2.20, glibc-2.2.5).
-#
-# From Jim Meyering, with suggestions from Paul Eggert.
-
-AC_DEFUN([gl_FUNC_UTIMES],
-[
- AC_CACHE_CHECK([determine whether the utimes function works],
- gl_cv_func_working_utimes,
- [
- AC_RUN_IFELSE([AC_LANG_SOURCE([[
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <sys/time.h>
-#include <time.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <utime.h>
-
-int
-main ()
-{
- static struct timeval timeval[2] = {{9, 10}, {999999, 999999}};
- struct stat sbuf;
- char const *file = "conftest.utimes";
- FILE *f;
- time_t now;
- int fd;
-
- int ok = ((f = fopen (file, "w"))
- && fclose (f) == 0
- && utimes (file, timeval) == 0
- && lstat (file, &sbuf) == 0
- && sbuf.st_atime == timeval[0].tv_sec
- && sbuf.st_mtime == timeval[1].tv_sec);
- unlink (file);
- if (!ok)
- exit (1);
-
- ok =
- ((f = fopen (file, "w"))
- && fclose (f) == 0
- && time (&now) != (time_t)-1
- && utimes (file, NULL) == 0
- && lstat (file, &sbuf) == 0
- && now - sbuf.st_atime <= 2
- && now - sbuf.st_mtime <= 2);
- unlink (file);
- if (!ok)
- exit (1);
-
- ok = (0 <= (fd = open (file, O_WRONLY|O_CREAT, 0444))
- && close (fd) == 0
- && utimes (file, NULL) == 0);
- unlink (file);
-
- exit (!ok);
-}
- ]])],
- [gl_cv_func_working_utimes=yes],
- [gl_cv_func_working_utimes=no],
- [gl_cv_func_working_utimes=no])])
-
- if test $gl_cv_func_working_utimes = yes; then
- AC_DEFINE([HAVE_WORKING_UTIMES], 1, [Define if utimes works properly. ])
- fi
-])