mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-11 22:00:08 +00:00
61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
/* shm_unlink -- remove a POSIX shared memory object. Generic POSIX version.
|
|
Copyright (C) 2001,2002,2005 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
|