1 # Detect some bugs in glibc's implementation of utimes.
3 dnl Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
4 dnl This file is free software; the Free Software Foundation
5 dnl gives unlimited permission to copy and/or distribute it,
6 dnl with or without modifications, as long as this notice is preserved.
8 # See if we need to work around bugs in glibc's implementation of
9 # utimes from 2003-07-12 to 2003-09-17.
10 # First, there was a bug that would make utimes set mtime
11 # and atime to zero (1970-01-01) unconditionally.
12 # Then, there was code to round rather than truncate.
13 # Then, there was an implementation (sparc64, Linux-2.4.28, glibc-2.3.3)
14 # that didn't honor the NULL-means-set-to-current-time semantics.
16 # From Jim Meyering, with suggestions from Paul Eggert.
18 AC_DEFUN([gl_FUNC_UTIMES],
20 AC_CACHE_CHECK([determine whether the utimes function works],
21 gl_cv_func_working_utimes,
23 AC_RUN_IFELSE([AC_LANG_SOURCE([[
24 #include <sys/types.h>
36 static struct timeval timeval[2] = {{9, 10}, {999999, 999999}};
38 char const *file = "conftest.utimes";
42 int ok = ((f = fopen (file, "w"))
44 && utimes (file, timeval) == 0
45 && lstat (file, &sbuf) == 0
46 && sbuf.st_atime == timeval[0].tv_sec
47 && sbuf.st_mtime == timeval[1].tv_sec);
53 ((f = fopen (file, "w"))
55 && time (&now) != (time_t)-1
56 && utimes (file, NULL) == 0
57 && lstat (file, &sbuf) == 0
58 && now - sbuf.st_atime <= 2
59 && now - sbuf.st_mtime <= 2);
65 [gl_cv_func_working_utimes=yes],
66 [gl_cv_func_working_utimes=no],
67 [gl_cv_func_working_utimes=no])])
69 if test $gl_cv_func_working_utimes = yes; then
70 AC_DEFINE([HAVE_WORKING_UTIMES], 1, [Define if utimes works properly. ])