X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fmkstemp.m4;h=d6430a9c2a2fcda3a996b34a3d60f0bb676771ac;hb=89d7698a351cd36d0e7baa44ee4bea3cf56cf459;hp=21bcc381d3c56ecf3b55c637899778a641221de8;hpb=f860e3df20c915841665852e59cb606ff595909f;p=gnulib.git

diff --git a/m4/mkstemp.m4 b/m4/mkstemp.m4
index 21bcc381d..d6430a9c2 100644
--- a/m4/mkstemp.m4
+++ b/m4/mkstemp.m4
@@ -1,51 +1,62 @@
-#serial 1
+#serial 18
 
-# On some systems (e.g., HPUX-10.20), mkstemp has the silly limit that it
-# can create no more than 26 files from a given template.  Other systems
-# lack mkstemp altogether.  On either type of system, arrange to use the
-# replacement function.
-AC_DEFUN([UTILS_FUNC_MKSTEMP],
-[dnl
-  AC_REPLACE_FUNCS(mkstemp)
-  if test $ac_cv_func_mkstemp = no; then
-    utils_cv_func_mkstemp_limitations=yes
-  else
-    AC_CACHE_CHECK([for mkstemp limitations],
-      utils_cv_func_mkstemp_limitations,
-      [
-	utils_tmpdir_mkstemp=mkst-$$$$
-	# Arrange for deletion-upon-exception of this temporary directory.
-	ac_clean_files="$ac_clean_files $utils_tmpdir_mkstemp"
-	mkdir $utils_tmpdir_mkstemp
+# 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.
 
-	AC_TRY_RUN([
-#         include <stdlib.h>
-	  int main ()
-	  {
-	    int i;
-	    for (i = 0; i < 30; i++)
-	      {
-		char template[] = "$utils_tmpdir_mkstemp/aXXXXXX";
-		if (mkstemp (template) == -1)
-		  exit (1);
-	      }
-	    exit (0);
-	  }
-	  ],
-	utils_cv_func_mkstemp_limitations=no,
-	utils_cv_func_mkstemp_limitations=yes,
-	utils_cv_func_mkstemp_limitations=yes
-	)
+# On some hosts (e.g., HP-UX 10.20, SunOS 4.1.4, Solaris 2.5.1), mkstemp has a
+# silly limit that it can create no more than 26 files from a given template.
+# Other systems lack mkstemp altogether.
+# On OSF1/Tru64 V4.0F, the system-provided mkstemp function can create
+# only 32 files per process.
+# On systems like the above, arrange to use the replacement function.
+AC_DEFUN([gl_FUNC_MKSTEMP],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_REQUIRE([AC_SYS_LARGEFILE])
 
-	rm -rf $utils_tmpdir_mkstemp
-      ]
-    )
+  AC_CHECK_FUNCS_ONCE([mkstemp])
+  if test $ac_cv_func_mkstemp = yes; then
+    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_working_mkstemp != yes; then
+      REPLACE_MKSTEMP=1
+      AC_LIBOBJ([mkstemp])
+      gl_PREREQ_MKSTEMP
+    fi
+  else
+    HAVE_MKSTEMP=0
+    AC_LIBOBJ([mkstemp])
+    gl_PREREQ_MKSTEMP
   fi
+])
 
-  if test $utils_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.])
-  fi
+# Prerequisites of lib/mkstemp.c.
+AC_DEFUN([gl_PREREQ_MKSTEMP],
+[
 ])