1 /* Header for directory for shm/sem files. 2 Copyright (C) 2014-2022 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 #ifndef _SHM_DIRECTORY_H 20 21 #include <limits.h> 22 #include <paths.h> 23 #include <stdbool.h> 24 25 /* The directory that contains shared POSIX objects. */ 26 #define SHMDIR _PATH_DEV "shm/" 27 28 struct shmdir_name 29 { 30 /* The combined prefix/name. The sizeof includes the terminating 31 NUL byte. 4 bytes are needed for the optional "sem." prefix. */ 32 char name[sizeof (SHMDIR) + 4 + NAME_MAX]; 33 }; 34 35 /* Sets RESULT->name to the constructed name and returns 0 on success, 36 or -1 on failure. Includes the "sem." prefix in the name if 37 SEM_PREFIX is true. */ 38 int __shm_get_name (struct shmdir_name *result, const char *name, 39 bool sem_prefix); 40 libc_hidden_proto (__shm_get_name) 41 42 #endif /* shm-directory.h */ 43