1 | /* Tests of *printf for very large strings. |
2 | Copyright (C) 2000-2022 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 | #include <array_length.h> |
20 | #include <locale.h> |
21 | #include <mcheck.h> |
22 | #include <stdint.h> |
23 | #include <stdio.h> |
24 | #include <stdlib.h> |
25 | #include <string.h> |
26 | #include <unistd.h> |
27 | #include <sys/stat.h> |
28 | #include <libc-diag.h> |
29 | |
30 | |
31 | const char *locs[] = |
32 | { |
33 | "C" , "de_DE.ISO-8859-1" , "de_DE.UTF-8" , "ja_JP.EUC-JP" |
34 | }; |
35 | |
36 | char large[50000]; |
37 | |
38 | static int |
39 | do_test (void) |
40 | { |
41 | char buf[25]; |
42 | size_t i; |
43 | int res = 0; |
44 | int fd; |
45 | |
46 | mtrace (); |
47 | |
48 | strcpy (buf, "/tmp/test-vfprintfXXXXXX" ); |
49 | fd = mkstemp (template: buf); |
50 | if (fd == -1) |
51 | { |
52 | printf (format: "cannot open temporary file: %m\n" ); |
53 | exit (1); |
54 | } |
55 | unlink (name: buf); |
56 | |
57 | for (i = 0; i < array_length (locs); ++i) |
58 | { |
59 | FILE *fp; |
60 | struct stat st; |
61 | int fd2; |
62 | |
63 | setlocale (LC_ALL, locs[i]); |
64 | |
65 | memset (large, '\1', sizeof (large)); |
66 | large[sizeof (large) - 1] = '\0'; |
67 | |
68 | fd2 = dup (fd: fd); |
69 | if (fd2 == -1) |
70 | { |
71 | printf (format: "cannot dup for locale %s: %m\n" , |
72 | setlocale (LC_ALL, NULL)); |
73 | exit (1); |
74 | } |
75 | |
76 | if (ftruncate (fd: fd2, length: 0) != 0) |
77 | { |
78 | printf (format: "cannot truncate file for locale %s: %m\n" , |
79 | setlocale (LC_ALL, NULL)); |
80 | exit (1); |
81 | } |
82 | |
83 | fp = fdopen (fd2, "a" ); |
84 | if (fp == NULL) |
85 | { |
86 | printf (format: "cannot create FILE for locale %s: %m\n" , |
87 | setlocale (LC_ALL, NULL)); |
88 | exit (1); |
89 | } |
90 | |
91 | fprintf (fp, "%s" , large); |
92 | fprintf (fp, "%.*s" , 30000, large); |
93 | large[20000] = '\0'; |
94 | /* We're testing a large format string here and need to generate it |
95 | to avoid this source file being ridiculous. So disable the warning |
96 | about a generated format string. */ |
97 | DIAG_PUSH_NEEDS_COMMENT; |
98 | DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wformat-security" ); |
99 | fprintf (fp, large); |
100 | DIAG_POP_NEEDS_COMMENT; |
101 | fprintf (fp, "%-1.300000000s" , "hello" ); |
102 | |
103 | if (fflush (fp) != 0 || ferror (stream: fp) != 0 || fclose (fp) != 0) |
104 | { |
105 | printf (format: "write error for locale %s: %m\n" , |
106 | setlocale (LC_ALL, NULL)); |
107 | exit (1); |
108 | } |
109 | |
110 | if (fstat (fd: fd, buf: &st) != 0) |
111 | { |
112 | printf (format: "cannot stat for locale %s: %m\n" , |
113 | setlocale (LC_ALL, NULL)); |
114 | exit (1); |
115 | } |
116 | else if (st.st_size != 50000 + 30000 + 19999 + 5) |
117 | { |
118 | printf (format: "file size incorrect for locale %s: %jd instead of %jd\n" , |
119 | setlocale (LC_ALL, NULL), |
120 | (intmax_t) st.st_size, |
121 | (intmax_t) 50000 + 30000 + 19999 + 5); |
122 | res = 1; |
123 | } |
124 | else |
125 | printf (format: "locale %s OK\n" , setlocale (LC_ALL, NULL)); |
126 | } |
127 | |
128 | close (fd: fd); |
129 | |
130 | return res; |
131 | } |
132 | |
133 | #define TEST_FUNCTION do_test () |
134 | #include "../test-skeleton.c" |
135 | |