75 lines
2.1 KiB
Plaintext
75 lines
2.1 KiB
Plaintext
# open.m4 serial 8
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dnl Copyright (C) 2007-2010 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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AC_DEFUN([gl_FUNC_OPEN],
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[
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AC_REQUIRE([AC_CANONICAL_HOST])
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case "$host_os" in
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mingw* | pw*)
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gl_REPLACE_OPEN
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;;
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*)
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dnl open("foo/") should not create a file when the file name has a
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dnl trailing slash. FreeBSD only has the problem on symlinks.
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AC_CHECK_FUNCS_ONCE([lstat])
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AC_CACHE_CHECK([whether open recognizes a trailing slash],
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[gl_cv_func_open_slash],
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[# Assume that if we have lstat, we can also check symlinks.
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if test $ac_cv_func_lstat = yes; then
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touch conftest.tmp
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ln -s conftest.tmp conftest.lnk
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fi
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AC_TRY_RUN([
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#include <fcntl.h>
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#if HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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int main ()
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{
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#if HAVE_LSTAT
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if (open ("conftest.lnk/", O_RDONLY) != -1) return 2;
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#endif
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return open ("conftest.sl/", O_CREAT, 0600) >= 0;
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}], [gl_cv_func_open_slash=yes], [gl_cv_func_open_slash=no],
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[
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changequote(,)dnl
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case "$host_os" in
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freebsd*) gl_cv_func_open_slash="guessing no" ;;
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solaris2.[0-9]*) gl_cv_func_open_slash="guessing no" ;;
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hpux*) gl_cv_func_open_slash="guessing no" ;;
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*) gl_cv_func_open_slash="guessing yes" ;;
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esac
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changequote([,])dnl
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])
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rm -f conftest.sl conftest.tmp conftest.lnk
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])
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case "$gl_cv_func_open_slash" in
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*no)
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AC_DEFINE([OPEN_TRAILING_SLASH_BUG], [1],
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[Define to 1 if open() fails to recognize a trailing slash.])
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gl_REPLACE_OPEN
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;;
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esac
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;;
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esac
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])
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AC_DEFUN([gl_REPLACE_OPEN],
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[
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AC_REQUIRE([gl_FCNTL_H_DEFAULTS])
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REPLACE_OPEN=1
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AC_LIBOBJ([open])
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gl_PREREQ_OPEN
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])
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# Prerequisites of lib/open.c.
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AC_DEFUN([gl_PREREQ_OPEN],
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[
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AC_REQUIRE([AC_C_INLINE])
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AC_REQUIRE([gl_PROMOTED_TYPE_MODE_T])
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:
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])
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