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Diffstat (limited to 'libio/tst-bz24153.c')
-rw-r--r-- | libio/tst-bz24153.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/libio/tst-bz24153.c b/libio/tst-bz24153.c new file mode 100644 index 0000000..85ad141 --- /dev/null +++ b/libio/tst-bz24153.c @@ -0,0 +1,114 @@ +/* Test that assigning to stdin redirects input (bug 24153). + Copyright (C) 2019 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 + <http://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"%c", &ch), 1); + TEST_COMPARE (ch, L'c'); + TEST_COMPARE (call_vwscanf (L"%c", &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> |