X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fmkstemp.m4;h=c5cd2820d16e8d7677fa084506da6d7e36947e34;hb=665d45ce3389bc459031a378dca82c0ab055dd32;hp=a5efedebdc2ac5db7805a611d71232105e749e38;hpb=8549308101cb9f6cc222d7445bfc13237a981006;p=gnulib.git

diff --git a/m4/mkstemp.m4 b/m4/mkstemp.m4
index a5efedebd..c5cd2820d 100644
--- a/m4/mkstemp.m4
+++ b/m4/mkstemp.m4
@@ -1,46 +1,68 @@
-#serial 1
+#serial 19
 
-# On some systems (e.g., HPUX-10.20, SunOS4.1.4, solaris2.5.1), mkstemp has the
+# Copyright (C) 2001, 2003-2007, 2009-2011 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.
+
+# 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 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,
+# 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])
+
+  AC_CHECK_FUNCS_ONCE([mkstemp])
+  if test $ac_cv_func_mkstemp = yes; then
+    AC_CACHE_CHECK([for working mkstemp],
+      [gl_cv_func_working_mkstemp],
       [
-	AC_TRY_RUN([
-#         include <stdlib.h>
-	  int main ()
-	  {
-	    int i;
-	    for (i = 0; i < 30; i++)
-	      {
-		char template[] = "conftestXXXXXX";
-		int fd = mkstemp (template);
-		if (fd == -1)
-		  exit (1);
-		close (fd);
-	      }
-	    exit (0);
-	  }
-	  ],
-	utils_cv_func_mkstemp_limitations=no,
-	utils_cv_func_mkstemp_limitations=yes,
-	utils_cv_func_mkstemp_limitations=yes
-	)
-      ]
-    )
+        mkdir conftest.mkstemp
+        AC_RUN_IFELSE(
+          [AC_LANG_PROGRAM(
+            [AC_INCLUDES_DEFAULT],
+            [[int result = 0;
+              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)
+                    result |= 1;
+                  else
+                    {
+                      if (lseek (fd, large, SEEK_SET) != large)
+                        result |= 2;
+                      close (fd);
+                    }
+                }
+              return result;]])],
+          [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],
+[
 ])