From a9a31b1de5776a3b08a82101a4fa711294f0dd1d Mon Sep 17 00:00:00 2001
From: "Manuel A. Fernandez Montecelo" <manuel.montezelo@gmail.com>
Date: Fri, 27 May 2016 14:28:30 +0100
Subject: Imported Upstream version 0.9.6+really0.9.3

---
 gnulib-m4/fcntl-o.m4 | 95 ++++++++++++----------------------------------------
 1 file changed, 21 insertions(+), 74 deletions(-)

(limited to 'gnulib-m4/fcntl-o.m4')

diff --git a/gnulib-m4/fcntl-o.m4 b/gnulib-m4/fcntl-o.m4
index 891a62f..d416a61 100644
--- a/gnulib-m4/fcntl-o.m4
+++ b/gnulib-m4/fcntl-o.m4
@@ -1,5 +1,5 @@
-# fcntl-o.m4 serial 4
-dnl Copyright (C) 2006, 2009-2015 Free Software Foundation, Inc.
+# fcntl-o.m4 serial 1
+dnl Copyright (C) 2006, 2009-2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -12,26 +12,13 @@ dnl Written by Paul Eggert.
 AC_DEFUN([gl_FCNTL_O_FLAGS],
 [
   dnl Persuade glibc <fcntl.h> to define O_NOATIME and O_NOFOLLOW.
-  dnl AC_USE_SYSTEM_EXTENSIONS was introduced in autoconf 2.60 and obsoletes
-  dnl AC_GNU_SOURCE.
-  m4_ifdef([AC_USE_SYSTEM_EXTENSIONS],
-    [AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])],
-    [AC_REQUIRE([AC_GNU_SOURCE])])
-
-  AC_CHECK_HEADERS_ONCE([unistd.h])
-  AC_CHECK_FUNCS_ONCE([symlink])
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
   AC_CACHE_CHECK([for working fcntl.h], [gl_cv_header_working_fcntl_h],
     [AC_RUN_IFELSE(
        [AC_LANG_PROGRAM(
           [[#include <sys/types.h>
            #include <sys/stat.h>
-           #if HAVE_UNISTD_H
-           # include <unistd.h>
-           #else /* on Windows with MSVC */
-           # include <io.h>
-           # include <stdlib.h>
-           # defined sleep(n) _sleep ((n) * 1000)
-           #endif
+           #include <unistd.h>
            #include <fcntl.h>
            #ifndef O_NOATIME
             #define O_NOATIME 0
@@ -46,74 +33,34 @@ AC_DEFUN([gl_FCNTL_O_FLAGS],
             };
           ]],
           [[
-            int result = !constants;
-            #if HAVE_SYMLINK
+            int status = !constants;
             {
               static char const sym[] = "conftest.sym";
-              if (symlink ("/dev/null", sym) != 0)
-                result |= 2;
-              else
-                {
-                  int fd = open (sym, O_WRONLY | O_NOFOLLOW | O_CREAT, 0);
-                  if (fd >= 0)
-                    {
-                      close (fd);
-                      result |= 4;
-                    }
-                }
-              if (unlink (sym) != 0 || symlink (".", sym) != 0)
-                result |= 2;
-              else
-                {
-                  int fd = open (sym, O_RDONLY | O_NOFOLLOW);
-                  if (fd >= 0)
-                    {
-                      close (fd);
-                      result |= 4;
-                    }
-                }
+              if (symlink (".", sym) != 0
+                  || close (open (sym, O_RDONLY | O_NOFOLLOW)) == 0)
+                status |= 32;
               unlink (sym);
             }
-            #endif
             {
               static char const file[] = "confdefs.h";
               int fd = open (file, O_RDONLY | O_NOATIME);
-              if (fd < 0)
-                result |= 8;
-              else
-                {
-                  struct stat st0;
-                  if (fstat (fd, &st0) != 0)
-                    result |= 16;
-                  else
-                    {
-                      char c;
-                      sleep (1);
-                      if (read (fd, &c, 1) != 1)
-                        result |= 24;
-                      else
-                        {
-                          if (close (fd) != 0)
-                            result |= 32;
-                          else
-                            {
-                              struct stat st1;
-                              if (stat (file, &st1) != 0)
-                                result |= 40;
-                              else
-                                if (st0.st_atime != st1.st_atime)
-                                  result |= 64;
-                            }
-                        }
-                    }
-                }
+              char c;
+              struct stat st0, st1;
+              if (fd < 0
+                  || fstat (fd, &st0) != 0
+                  || sleep (1) != 0
+                  || read (fd, &c, 1) != 1
+                  || close (fd) != 0
+                  || stat (file, &st1) != 0
+                  || st0.st_atime != st1.st_atime)
+                status |= 64;
             }
-            return result;]])],
+            return status;]])],
        [gl_cv_header_working_fcntl_h=yes],
        [case $? in #(
-        4) gl_cv_header_working_fcntl_h='no (bad O_NOFOLLOW)';; #(
+        32) gl_cv_header_working_fcntl_h='no (bad O_NOFOLLOW)';; #(
         64) gl_cv_header_working_fcntl_h='no (bad O_NOATIME)';; #(
-        68) gl_cv_header_working_fcntl_h='no (bad O_NOATIME, O_NOFOLLOW)';; #(
+        96) gl_cv_header_working_fcntl_h='no (bad O_NOATIME, O_NOFOLLOW)';; #(
          *) gl_cv_header_working_fcntl_h='no';;
         esac],
        [gl_cv_header_working_fcntl_h=cross-compiling])])
-- 
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