1 # open-slash.m4 serial 2 2 dnl Copyright (C) 2007-2022 Free Software Foundation, Inc. 3 dnl This file is free software; the Free Software Foundation 4 dnl gives unlimited permission to copy and/or distribute it, 5 dnl with or without modifications, as long as this notice is preserved. 6 7 dnl Tests whether open() and creat() recognize a trailing slash. 8 dnl Sets gl_cv_func_open_slash. 9 AC_DEFUN([gl_OPEN_TRAILING_SLASH_BUG], 10 [ 11 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 12 dnl open("foo/") should not create a file when the file name has a 13 dnl trailing slash. FreeBSD only has the problem on symlinks. 14 AC_CHECK_FUNCS_ONCE([lstat]) 15 AC_CACHE_CHECK([whether open recognizes a trailing slash], 16 [gl_cv_func_open_slash], 17 [# Assume that if we have lstat, we can also check symlinks. 18 if test $ac_cv_func_lstat = yes; then 19 touch conftest.tmp 20 ln -s conftest.tmp conftest.lnk 21 fi 22 AC_RUN_IFELSE( 23 [AC_LANG_SOURCE([[ 24 #include <fcntl.h> 25 #if HAVE_UNISTD_H 26 # include <unistd.h> 27 #endif 28 ]GL_MDA_DEFINES[ 29 int main () 30 { 31 int result = 0; 32 #if HAVE_LSTAT 33 if (open ("conftest.lnk/", O_RDONLY) != -1) 34 result |= 1; 35 #endif 36 if (open ("conftest.sl/", O_CREAT, 0600) >= 0) 37 result |= 2; 38 return result; 39 }]])], 40 [gl_cv_func_open_slash=yes], 41 [gl_cv_func_open_slash=no], 42 [ 43 changequote(,)dnl 44 case "$host_os" in 45 freebsd* | aix* | hpux* | solaris2.[0-9] | solaris2.[0-9].*) 46 gl_cv_func_open_slash="guessing no" ;; 47 *) 48 gl_cv_func_open_slash="guessing yes" ;; 49 esac 50 changequote([,])dnl 51 ]) 52 rm -f conftest.sl conftest.tmp conftest.lnk 53 ]) 54 case "$gl_cv_func_open_slash" in 55 *no) 56 AC_DEFINE([OPEN_TRAILING_SLASH_BUG], [1], 57 [Define to 1 if open() fails to recognize a trailing slash.]) 58 ;; 59 esac 60 ]) 61
Indexes created Mon May 04 00:23:20 UTC 2026