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# open.m4 serial 16
dnl Copyright (C) 2007-2023 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_DEFUN([gl_FUNC_OPEN],
[
AC_REQUIRE([AC_CANONICAL_HOST])
AC_REQUIRE([gl_PREPROC_O_CLOEXEC])
case "$host_os" in
mingw* | windows* | pw*)
REPLACE_OPEN=1
;;
*)
dnl open("foo/") should not create a file when the file name has a
dnl trailing slash. FreeBSD only has the problem on symlinks.
AC_CHECK_FUNCS_ONCE([lstat])
if test "$gl_cv_macro_O_CLOEXEC" != yes; then
REPLACE_OPEN=1
fi
gl_OPEN_TRAILING_SLASH_BUG
case "$gl_cv_func_open_slash" in
*no)
REPLACE_OPEN=1
;;
esac
;;
esac
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.
AC_DEFUN([gl_PREREQ_OPEN],
[
AC_REQUIRE([gl_PROMOTED_TYPE_MODE_T])
:
])
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