1 | /* Test that assigning to stdin redirects input (bug 24153). |
2 | Copyright (C) 2019-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | /* Prevent getchar -> getc inline expansion. */ |
20 | #define __NO_INLINE__ |
21 | #pragma GCC optimize ("O0") |
22 | |
23 | #include <stdarg.h> |
24 | #include <stdio.h> |
25 | #include <stdlib.h> |
26 | #include <string.h> |
27 | #include <support/check.h> |
28 | #include <support/temp_file.h> |
29 | #include <support/xstdio.h> |
30 | #include <support/xunistd.h> |
31 | #include <wchar.h> |
32 | |
33 | static int |
34 | call_vscanf (const char *format, ...) |
35 | { |
36 | va_list ap; |
37 | va_start (ap, format); |
38 | int ret = vscanf (format: format, arg: ap); |
39 | va_end (ap); |
40 | return ret; |
41 | } |
42 | |
43 | static int |
44 | call_vwscanf (const wchar_t *format, ...) |
45 | { |
46 | va_list ap; |
47 | va_start (ap, format); |
48 | int ret = vwscanf (format: format, arg: ap); |
49 | va_end (ap); |
50 | return ret; |
51 | } |
52 | |
53 | static void |
54 | narrow (const char *path) |
55 | { |
56 | FILE *old_stdin = stdin; |
57 | stdin = xfopen (path, mode: "r" ); |
58 | |
59 | TEST_COMPARE (getchar (), 'a'); |
60 | TEST_COMPARE (getchar_unlocked (), 'b'); |
61 | char ch = 1; |
62 | TEST_COMPARE (scanf ("%c" , &ch), 1); |
63 | TEST_COMPARE (ch, 'c'); |
64 | TEST_COMPARE (call_vscanf ("%c" , &ch), 1); |
65 | TEST_COMPARE (ch, 'd'); |
66 | char buf[8]; |
67 | memset (buf, 'X', sizeof (buf)); |
68 | |
69 | /* Legacy interface. */ |
70 | extern char *gets (char *); |
71 | TEST_VERIFY (gets (buf) == buf); |
72 | TEST_COMPARE_BLOB (buf, sizeof (buf), "ef\0XXXXX" , sizeof (buf)); |
73 | |
74 | fclose (stdin); |
75 | stdin = old_stdin; |
76 | } |
77 | |
78 | static void |
79 | wide (const char *path) |
80 | { |
81 | FILE *old_stdin = stdin; |
82 | stdin = xfopen (path, mode: "r" ); |
83 | |
84 | TEST_COMPARE (getwchar (), L'a'); |
85 | TEST_COMPARE (getwchar_unlocked (), L'b'); |
86 | wchar_t ch = 1; |
87 | TEST_COMPARE (wscanf (L"%lc" , &ch), 1); |
88 | TEST_COMPARE (ch, L'c'); |
89 | TEST_COMPARE (call_vwscanf (L"%lc" , &ch), 1); |
90 | TEST_COMPARE (ch, L'd'); |
91 | |
92 | fclose (stdin); |
93 | stdin = old_stdin; |
94 | } |
95 | |
96 | static int |
97 | do_test (void) |
98 | { |
99 | char *path; |
100 | { |
101 | int fd = create_temp_file (base: "tst-bz24153-" , filename: &path); |
102 | TEST_VERIFY_EXIT (fd >= 0); |
103 | xwrite (fd, "abcdef" , strlen ("abcdef" )); |
104 | xclose (fd); |
105 | } |
106 | |
107 | narrow (path); |
108 | wide (path); |
109 | |
110 | free (ptr: path); |
111 | return 0; |
112 | } |
113 | |
114 | #include <support/test-driver.c> |
115 | |