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c23de0aa | 1 | /* Common extra functions. |
688903eb | 2 | Copyright (C) 2016-2018 Free Software Foundation, Inc. |
c23de0aa FW |
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 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | /* This header file should only contain definitions compatible with | |
20 | C90. (Using __attribute__ is fine because <features.h> provides a | |
21 | fallback.) */ | |
22 | ||
23 | #ifndef SUPPORT_H | |
24 | #define SUPPORT_H | |
25 | ||
26 | #include <stddef.h> | |
27 | #include <sys/cdefs.h> | |
28 | ||
29 | __BEGIN_DECLS | |
30 | ||
31 | /* Write a message to standard output. Can be used in signal | |
32 | handlers. */ | |
33 | void write_message (const char *message) __attribute__ ((nonnull (1))); | |
34 | ||
35 | /* Avoid all the buffer overflow messages on stderr. */ | |
36 | void ignore_stderr (void); | |
37 | ||
38 | /* Set fortification error handler. Used when tests want to verify that bad | |
39 | code is caught by the library. */ | |
40 | void set_fortify_handler (void (*handler) (int sig)); | |
41 | ||
42 | /* Report an out-of-memory error for the allocation of SIZE bytes in | |
43 | FUNCTION, terminating the process. */ | |
44 | void oom_error (const char *function, size_t size) | |
45 | __attribute__ ((nonnull (1))); | |
46 | ||
2714c5f3 FW |
47 | /* Return a pointer to a memory region of SIZE bytes. The memory is |
48 | initialized to zero and will be shared with subprocesses (across | |
49 | fork). The returned pointer must be freed using | |
50 | support_shared_free; it is not compatible with the malloc | |
51 | functions. */ | |
52 | void *support_shared_allocate (size_t size); | |
53 | ||
54 | /* Deallocate a pointer returned by support_shared_allocate. */ | |
55 | void support_shared_free (void *); | |
56 | ||
57 | /* Write CONTENTS to the file PATH. Create or truncate the file as | |
58 | needed. The file mode is 0666 masked by the umask. Terminate the | |
59 | process on error. */ | |
60 | void support_write_file_string (const char *path, const char *contents); | |
61 | ||
c23de0aa FW |
62 | /* Error-checking wrapper functions which terminate the process on |
63 | error. */ | |
64 | ||
65 | void *xmalloc (size_t) __attribute__ ((malloc)); | |
66 | void *xcalloc (size_t n, size_t s) __attribute__ ((malloc)); | |
67 | void *xrealloc (void *p, size_t n); | |
68 | char *xasprintf (const char *format, ...) | |
69 | __attribute__ ((format (printf, 1, 2), malloc)); | |
5840c75c | 70 | char *xstrdup (const char *); |
1ffe1ccb | 71 | char *xstrndup (const char *, size_t); |
c23de0aa FW |
72 | |
73 | __END_DECLS | |
74 | ||
75 | #endif /* SUPPORT_H */ |