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/* shm_unlink -- remove a POSIX shared memory object. Generic POSIX version.
Copyright (C) 2001-2014 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
<http://www.gnu.org/licenses/>. */
#include <unistd.h>
#if ! _POSIX_MAPPED_FILES
#include <rt/shm_unlink.c>
#else
#include <errno.h>
#include <sys/mman.h>
#include <string.h>
#include <stdlib.h>
#include <paths.h>
#define SHMDIR (_PATH_DEV "shm/")
/* Remove shared memory object. */
int
shm_unlink (const char *name)
{
size_t namelen;
char *fname;
/* Construct the filename. */
while (name[0] == '/')
++name;
if (name[0] == '\0')
{
/* The name "/" is not supported. */
__set_errno (EINVAL);
return -1;
}
namelen = strlen (name);
fname = (char *) __alloca (sizeof SHMDIR - 1 + namelen + 1);
__mempcpy (__mempcpy (fname, SHMDIR, sizeof SHMDIR - 1),
name, namelen + 1);
return unlink (name);
}
#endif
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