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Diffstat (limited to 'gnulib-m4/fcntl-o.m4')
-rw-r--r--gnulib-m4/fcntl-o.m495
1 files changed, 21 insertions, 74 deletions
diff --git a/gnulib-m4/fcntl-o.m4 b/gnulib-m4/fcntl-o.m4
index 891a62fb..d416a61c 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])])