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78e21c5d | 1 | /* Determine directory for shm/sem files. Generic POSIX version. |
2b778ceb | 2 | Copyright (C) 2014-2021 Free Software Foundation, Inc. |
78e21c5d RM |
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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
78e21c5d | 18 | |
78e21c5d RM |
19 | #include <unistd.h> |
20 | ||
21 | #if _POSIX_MAPPED_FILES | |
22 | ||
e9fed243 FW |
23 | #include <alloc_buffer.h> |
24 | #include <shm-directory.h> | |
25 | #include <string.h> | |
78e21c5d | 26 | |
e9fed243 FW |
27 | int |
28 | __shm_get_name (struct shmdir_name *result, const char *name, bool sem_prefix) | |
78e21c5d | 29 | { |
e9fed243 FW |
30 | while (name[0] == '/') |
31 | ++name; | |
32 | size_t namelen = strlen (name); | |
33 | ||
34 | struct alloc_buffer buffer | |
35 | = alloc_buffer_create (result->name, sizeof (result->name)); | |
36 | alloc_buffer_copy_bytes (&buffer, SHMDIR, strlen (SHMDIR)); | |
37 | if (sem_prefix) | |
38 | alloc_buffer_copy_bytes (&buffer, "sem.", strlen ("sem.")); | |
39 | alloc_buffer_copy_bytes (&buffer, name, namelen + 1); | |
40 | if (namelen == 0 || memchr (name, '/', namelen) != NULL | |
41 | || alloc_buffer_has_failed (&buffer)) | |
42 | return -1; | |
43 | return 0; | |
78e21c5d | 44 | } |
0b7d48d1 | 45 | libc_hidden_def (__shm_get_name) |
78e21c5d RM |
46 | |
47 | #endif |