3 dnl Copyright (C) 2007-2024 Free Software Foundation, Inc.
4 dnl This file is free software; the Free Software Foundation
5 dnl gives unlimited permission to copy and/or distribute it,
6 dnl with or without modifications, as long as this notice is preserved.
8 dnl Tests whether open() and creat() recognize a trailing slash.
9 dnl Sets gl_cv_func_open_slash.
10 AC_DEFUN([gl_OPEN_TRAILING_SLASH_BUG],
12 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
13 dnl open("foo/") should not create a file when the file name has a
14 dnl trailing slash. FreeBSD only has the problem on symlinks.
15 AC_CHECK_FUNCS_ONCE([lstat])
16 AC_CACHE_CHECK([whether open recognizes a trailing slash],
17 [gl_cv_func_open_slash],
18 [# Assume that if we have lstat, we can also check symlinks.
19 if test $ac_cv_func_lstat = yes; then
21 ln -s conftest.tmp conftest.lnk
34 if (open ("conftest.lnk/", O_RDONLY) != -1)
37 if (open ("conftest.sl/", O_CREAT, 0600) >= 0)
41 [gl_cv_func_open_slash=yes],
42 [gl_cv_func_open_slash=no],
46 freebsd* | aix* | hpux* | solaris2.[0-9] | solaris2.[0-9].*)
47 gl_cv_func_open_slash="guessing no" ;;
49 gl_cv_func_open_slash="guessing yes" ;;
53 rm -f conftest.sl conftest.tmp conftest.lnk
55 case "$gl_cv_func_open_slash" in
57 AC_DEFINE([OPEN_TRAILING_SLASH_BUG], [1],
58 [Define to 1 if open() fails to recognize a trailing slash.])