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/* Test that assigning to stdin redirects input (bug 24153).
Copyright (C) 2019-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/* Prevent getchar -> getc inline expansion. */
#define __NO_INLINE__
#pragma GCC optimize ("O0")
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <support/check.h>
#include <support/temp_file.h>
#include <support/xstdio.h>
#include <support/xunistd.h>
#include <wchar.h>
static int
call_vscanf (const char *format, ...)
{
va_list ap;
va_start (ap, format);
int ret = vscanf (format, ap);
va_end (ap);
return ret;
}
static int
call_vwscanf (const wchar_t *format, ...)
{
va_list ap;
va_start (ap, format);
int ret = vwscanf (format, ap);
va_end (ap);
return ret;
}
static void
narrow (const char *path)
{
FILE *old_stdin = stdin;
stdin = xfopen (path, "r");
TEST_COMPARE (getchar (), 'a');
TEST_COMPARE (getchar_unlocked (), 'b');
char ch = 1;
TEST_COMPARE (scanf ("%c", &ch), 1);
TEST_COMPARE (ch, 'c');
TEST_COMPARE (call_vscanf ("%c", &ch), 1);
TEST_COMPARE (ch, 'd');
char buf[8];
memset (buf, 'X', sizeof (buf));
/* Legacy interface. */
extern char *gets (char *);
TEST_VERIFY (gets (buf) == buf);
TEST_COMPARE_BLOB (buf, sizeof (buf), "ef\0XXXXX", sizeof (buf));
fclose (stdin);
stdin = old_stdin;
}
static void
wide (const char *path)
{
FILE *old_stdin = stdin;
stdin = xfopen (path, "r");
TEST_COMPARE (getwchar (), L'a');
TEST_COMPARE (getwchar_unlocked (), L'b');
wchar_t ch = 1;
TEST_COMPARE (wscanf (L"%lc", &ch), 1);
TEST_COMPARE (ch, L'c');
TEST_COMPARE (call_vwscanf (L"%lc", &ch), 1);
TEST_COMPARE (ch, L'd');
fclose (stdin);
stdin = old_stdin;
}
static int
do_test (void)
{
char *path;
{
int fd = create_temp_file ("tst-bz24153-", &path);
TEST_VERIFY_EXIT (fd >= 0);
xwrite (fd, "abcdef", strlen ("abcdef"));
xclose (fd);
}
narrow (path);
wide (path);
free (path);
return 0;
}
#include <support/test-driver.c>
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