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[gnulib.git] / m4 / mkstemp.m4

diff --git a/m4/mkstemp.m4 b/m4/mkstemp.m4
index 0ce51dd..e4fee76 100644 (file)
--- a/m4/mkstemp.m4
+++ b/m4/mkstemp.m4
@@ -1,6 +1,6 @@
-#serial 13
+#serial 17
 
-# Copyright (C) 2001, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+# Copyright (C) 2001, 2003-2007, 2009-2010 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
@@ -12,48 +12,41 @@
 # only 32 files per process.
 # On systems like the above, arrange to use the replacement function.
 AC_DEFUN([gl_FUNC_MKSTEMP],
-[dnl
-  AC_REPLACE_FUNCS(mkstemp)
-  if test $ac_cv_func_mkstemp = no; then
-    gl_cv_func_mkstemp_limitations=yes
-  else
-    AC_CACHE_CHECK([for mkstemp limitations],
-      gl_cv_func_mkstemp_limitations,
-      [
-        mkdir conftest.mkstemp
-       AC_TRY_RUN([
-#           include <stdlib.h>
-#           include <unistd.h>
-           int main ()
-           {
-             int i;
-             for (i = 0; i < 70; i++)
-               {
-                 char template[] = "conftest.mkstemp/coXXXXXX";
-                 int fd = mkstemp (template);
-                 if (fd == -1)
-                   exit (1);
-                 close (fd);
-               }
-             exit (0);
-           }
-           ],
-         gl_cv_func_mkstemp_limitations=no,
-         gl_cv_func_mkstemp_limitations=yes,
-         gl_cv_func_mkstemp_limitations=yes
-         )
-        rm -rf conftest.mkstemp
-      ]
-    )
-  fi
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_REQUIRE([AC_SYS_LARGEFILE])
+
+  AC_CACHE_CHECK([for working mkstemp],
+    [gl_cv_func_working_mkstemp],
+    [
+      mkdir conftest.mkstemp
+      AC_RUN_IFELSE(
+        [AC_LANG_PROGRAM(
+          [AC_INCLUDES_DEFAULT],
+          [[int i;
+            off_t large = (off_t) 4294967295u;
+            if (large < 0)
+              large = 2147483647;
+            for (i = 0; i < 70; i++)
+              {
+                char templ[] = "conftest.mkstemp/coXXXXXX";
+                int (*mkstemp_function) (char *) = mkstemp;
+                int fd = mkstemp_function (templ);
+                if (fd < 0 || lseek (fd, large, SEEK_SET) != large)
+                  return 1;
+                close (fd);
+              }
+            return 0;]])],
+        [gl_cv_func_working_mkstemp=yes],
+        [gl_cv_func_working_mkstemp=no],
+        [gl_cv_func_working_mkstemp=no])
+      rm -rf conftest.mkstemp
+    ])
 
-  if test $gl_cv_func_mkstemp_limitations = yes; then
-    AC_LIBOBJ(mkstemp)
-    AC_LIBOBJ(tempname)
-    AC_DEFINE(mkstemp, rpl_mkstemp,
-      [Define to rpl_mkstemp if the replacement function should be used.])
+  if test $gl_cv_func_working_mkstemp != yes; then
+    REPLACE_MKSTEMP=1
+    AC_LIBOBJ([mkstemp])
     gl_PREREQ_MKSTEMP
-    gl_PREREQ_TEMPNAME
   fi
 ])
 
@@ -61,10 +54,3 @@ AC_DEFUN([gl_FUNC_MKSTEMP],
 AC_DEFUN([gl_PREREQ_MKSTEMP],
 [
 ])
-
-# Prerequisites of lib/tempname.c.
-AC_DEFUN([gl_PREREQ_TEMPNAME],
-[
-  AC_CHECK_HEADERS_ONCE(sys/time.h)
-  AC_CHECK_FUNCS(__secure_getenv gettimeofday)
-])