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-rw-r--r--gl/m4/open.m456
1 files changed, 56 insertions, 0 deletions
diff --git a/gl/m4/open.m4 b/gl/m4/open.m4
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1# open.m4 serial 15
2dnl Copyright (C) 2007-2023 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7AC_DEFUN([gl_FUNC_OPEN],
8[
9 AC_REQUIRE([AC_CANONICAL_HOST])
10 AC_REQUIRE([gl_PREPROC_O_CLOEXEC])
11 case "$host_os" in
12 mingw* | pw*)
13 REPLACE_OPEN=1
14 ;;
15 *)
16 dnl open("foo/") should not create a file when the file name has a
17 dnl trailing slash. FreeBSD only has the problem on symlinks.
18 AC_CHECK_FUNCS_ONCE([lstat])
19 if test "$gl_cv_macro_O_CLOEXEC" != yes; then
20 REPLACE_OPEN=1
21 fi
22 gl_OPEN_TRAILING_SLASH_BUG
23 case "$gl_cv_func_open_slash" in
24 *no)
25 REPLACE_OPEN=1
26 ;;
27 esac
28 ;;
29 esac
30 dnl Replace open() for supporting the gnulib-defined fchdir() function,
31 dnl to keep fchdir's bookkeeping up-to-date.
32 m4_ifdef([gl_FUNC_FCHDIR], [
33 if test $REPLACE_OPEN = 0; then
34 gl_TEST_FCHDIR
35 if test $HAVE_FCHDIR = 0; then
36 REPLACE_OPEN=1
37 fi
38 fi
39 ])
40 dnl Replace open() for supporting the gnulib-defined O_NONBLOCK flag.
41 m4_ifdef([gl_NONBLOCKING_IO], [
42 if test $REPLACE_OPEN = 0; then
43 gl_NONBLOCKING_IO
44 if test $gl_cv_have_open_O_NONBLOCK != yes; then
45 REPLACE_OPEN=1
46 fi
47 fi
48 ])
49])
50
51# Prerequisites of lib/open.c.
52AC_DEFUN([gl_PREREQ_OPEN],
53[
54 AC_REQUIRE([gl_PROMOTED_TYPE_MODE_T])
55 :
56])