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authorJim Meyering <jim@meyering.net>2003-08-10 09:57:26 +0000
committerJim Meyering <jim@meyering.net>2003-08-10 09:57:26 +0000
commit84450a03e48e9ff34377a02cb9fb932c0460af68 (patch)
tree31426f90170ec6e1cd565179d01b1f178d2d9019 /m4
parent88d7fc08b152af44f40e77239e65eb879453398a (diff)
downloadcoreutils-84450a03e48e9ff34377a02cb9fb932c0460af68.tar.xz
Renamed from utimes.m4.
Diffstat (limited to 'm4')
-rw-r--r--m4/utimes-null.m432
1 files changed, 32 insertions, 0 deletions
diff --git a/m4/utimes-null.m4 b/m4/utimes-null.m4
new file mode 100644
index 000000000..f7e7842c5
--- /dev/null
+++ b/m4/utimes-null.m4
@@ -0,0 +1,32 @@
+#serial 4
+
+dnl Shamelessly cloned from acspecific.m4's AC_FUNC_UTIME_NULL,
+dnl then do case-insensitive s/utime/utimes/.
+
+AC_DEFUN([jm_FUNC_UTIMES_NULL],
+[AC_CACHE_CHECK(whether utimes accepts a null argument, ac_cv_func_utimes_null,
+[rm -f conftest.data; > conftest.data
+AC_TRY_RUN([
+/* In case stat has been defined to rpl_stat, undef it here. */
+#undef stat
+#include <sys/types.h>
+#include <sys/stat.h>
+main() {
+struct stat s, t;
+exit(!(stat ("conftest.data", &s) == 0
+ && utimes("conftest.data", (long *)0) == 0
+ && stat("conftest.data", &t) == 0
+ && t.st_mtime >= s.st_mtime
+ && t.st_mtime - s.st_mtime < 120));
+}],
+ ac_cv_func_utimes_null=yes,
+ ac_cv_func_utimes_null=no,
+ ac_cv_func_utimes_null=no)
+rm -f core core.* *.core])
+
+ if test $ac_cv_func_utimes_null = yes; then
+ AC_DEFINE(HAVE_UTIMES_NULL, 1,
+ [Define if utimes accepts a null argument])
+ fi
+ ]
+)