-# open.m4 serial 7
-dnl Copyright (C) 2007-2009 Free Software Foundation, Inc.
+# open.m4 serial 13
+dnl Copyright (C) 2007-2012 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.
AC_REQUIRE([AC_CANONICAL_HOST])
case "$host_os" in
mingw* | pw*)
- gl_REPLACE_OPEN
+ REPLACE_OPEN=1
;;
*)
dnl open("foo/") should not create a file when the file name has a
- dnl trailing slash.
+ dnl trailing slash. FreeBSD only has the problem on symlinks.
+ AC_CHECK_FUNCS_ONCE([lstat])
AC_CACHE_CHECK([whether open recognizes a trailing slash],
[gl_cv_func_open_slash],
- [
- AC_TRY_RUN([
+ [# Assume that if we have lstat, we can also check symlinks.
+ if test $ac_cv_func_lstat = yes; then
+ touch conftest.tmp
+ ln -s conftest.tmp conftest.lnk
+ fi
+ AC_RUN_IFELSE(
+ [AC_LANG_SOURCE([[
#include <fcntl.h>
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
int main ()
{
- return open ("conftest.sl/", O_CREAT, 0600) >= 0;
-}], [gl_cv_func_open_slash=yes], [gl_cv_func_open_slash=no],
+ int result = 0;
+#if HAVE_LSTAT
+ if (open ("conftest.lnk/", O_RDONLY) != -1)
+ result |= 1;
+#endif
+ if (open ("conftest.sl/", O_CREAT, 0600) >= 0)
+ result |= 2;
+ return result;
+}]])],
+ [gl_cv_func_open_slash=yes],
+ [gl_cv_func_open_slash=no],
[
changequote(,)dnl
case "$host_os" in
- solaris2.[0-9]*) gl_cv_func_open_slash="guessing no" ;;
- hpux*) gl_cv_func_open_slash="guessing no" ;;
- *) gl_cv_func_open_slash="guessing yes" ;;
+ freebsd* | aix* | hpux* | solaris2.[0-9] | solaris2.[0-9].*)
+ gl_cv_func_open_slash="guessing no" ;;
+ *)
+ gl_cv_func_open_slash="guessing yes" ;;
esac
changequote([,])dnl
])
- rm -f conftest.sl
+ rm -f conftest.sl conftest.tmp conftest.lnk
])
case "$gl_cv_func_open_slash" in
*no)
AC_DEFINE([OPEN_TRAILING_SLASH_BUG], [1],
[Define to 1 if open() fails to recognize a trailing slash.])
- gl_REPLACE_OPEN
+ REPLACE_OPEN=1
;;
esac
;;
esac
-])
-
-AC_DEFUN([gl_REPLACE_OPEN],
-[
- AC_REQUIRE([gl_FCNTL_H_DEFAULTS])
- REPLACE_OPEN=1
- AC_LIBOBJ([open])
- gl_PREREQ_OPEN
+ dnl Replace open() for supporting the gnulib-defined fchdir() function,
+ dnl to keep fchdir's bookkeeping up-to-date.
+ m4_ifdef([gl_FUNC_FCHDIR], [
+ if test $REPLACE_OPEN = 0; then
+ gl_TEST_FCHDIR
+ if test $HAVE_FCHDIR = 0; then
+ REPLACE_OPEN=1
+ fi
+ fi
+ ])
+ dnl Replace open() for supporting the gnulib-defined O_NONBLOCK flag.
+ m4_ifdef([gl_NONBLOCKING_IO], [
+ if test $REPLACE_OPEN = 0; then
+ gl_NONBLOCKING_IO
+ if test $gl_cv_have_open_O_NONBLOCK != yes; then
+ REPLACE_OPEN=1
+ fi
+ fi
+ ])
])
# Prerequisites of lib/open.c.