| 1 | /* Header for directory for shm/sem files. |
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| 2 | Copyright (C) 2014-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #ifndef _SHM_DIRECTORY_H |
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| 20 | |
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| 21 | #include <limits.h> |
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| 22 | #include <paths.h> |
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| 23 | #include <stdbool.h> |
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| 24 | |
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| 25 | /* The directory that contains shared POSIX objects. */ |
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| 26 | #define SHMDIR _PATH_DEV "shm/" |
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| 27 | |
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| 28 | struct shmdir_name |
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| 29 | { |
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| 30 | /* The combined prefix/name. The sizeof includes the terminating |
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| 31 | NUL byte. 4 bytes are needed for the optional "sem." prefix. */ |
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| 32 | char name[sizeof (SHMDIR) + 4 + NAME_MAX]; |
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| 33 | }; |
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| 34 | |
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| 35 | /* Sets RESULT->name to the constructed name and returns 0 on success, |
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| 36 | or -1 on failure. Includes the "sem." prefix in the name if |
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| 37 | SEM_PREFIX is true. */ |
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| 38 | int __shm_get_name (struct shmdir_name *result, const char *name, |
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| 39 | bool sem_prefix); |
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| 40 | libc_hidden_proto (__shm_get_name) |
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| 41 | |
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| 42 | #endif /* shm-directory.h */ |
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| 43 | |
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