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/* Header for directory for shm/sem files.
Copyright (C) 2014-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _SHM_DIRECTORY_H
#include <limits.h>
#include <paths.h>
#include <stdbool.h>
/* The directory that contains shared POSIX objects. */
#define SHMDIR _PATH_DEV "shm/"
struct shmdir_name
{
/* The combined prefix/name. The sizeof includes the terminating
NUL byte. 4 bytes are needed for the optional "sem." prefix. */
char name[sizeof (SHMDIR) + 4 + NAME_MAX];
};
/* Sets RESULT->name to the constructed name and returns 0 on success,
or -1 on failure. Includes the "sem." prefix in the name if
SEM_PREFIX is true. */
int __shm_get_name (struct shmdir_name *result, const char *name,
bool sem_prefix);
#endif /* shm-directory.h */
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