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# fopen.m4 serial 10
dnl Copyright (C) 2007-2020 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_FOPEN],
[
AC_REQUIRE([gl_STDIO_H_DEFAULTS])
AC_REQUIRE([AC_CANONICAL_HOST])
case "$host_os" in
mingw* | pw*)
dnl Replace fopen, for handling of "/dev/null".
REPLACE_FOPEN=1
dnl fopen on mingw also has the trailing slash bug.
gl_cv_func_fopen_slash="guessing no"
;;
*)
dnl fopen("foo/", "w") should not create a file when the file name has a
dnl trailing slash.
AC_CACHE_CHECK([whether fopen recognizes a trailing slash],
[gl_cv_func_fopen_slash],
[
AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#include <stddef.h>
#include <stdio.h>
int main ()
{
FILE *fp = fopen ("conftest.sl/", "w");
int result = (fp != NULL);
if (fp != NULL)
fclose (fp);
return result;
}]])],
[gl_cv_func_fopen_slash=yes],
[gl_cv_func_fopen_slash=no],
[
changequote(,)dnl
case "$host_os" in
aix* | hpux* | solaris2.[0-9] | solaris2.[0-9].*)
gl_cv_func_fopen_slash="guessing no" ;;
*)
gl_cv_func_fopen_slash="guessing yes" ;;
esac
changequote([,])dnl
])
rm -f conftest.sl
])
;;
esac
case "$gl_cv_func_fopen_slash" in
*no)
AC_DEFINE([FOPEN_TRAILING_SLASH_BUG], [1],
[Define to 1 if fopen() fails to recognize a trailing slash.])
REPLACE_FOPEN=1
;;
esac
])
# Prerequisites of lib/fopen.c.
AC_DEFUN([gl_PREREQ_FOPEN], [:])
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