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1 | /* Test that assigning to stdin redirects input (bug 24153). | |
2 | Copyright (C) 2019 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, 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, 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, "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, "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 ("tst-bz24153-", &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 (path); | |
111 | return 0; | |
112 | } | |
113 | ||
114 | #include <support/test-driver.c> |