67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
|
|
|
|
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 <errno.h>
|
|
#include <semaphore.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include "semaphoreP.h"
|
|
|
|
|
|
int
|
|
sem_unlink (name)
|
|
const char *name;
|
|
{
|
|
char *fname;
|
|
size_t namelen;
|
|
|
|
/* Determine where the shmfs is mounted. */
|
|
__pthread_once (&__namedsem_once, __where_is_shmfs);
|
|
|
|
/* If we don't know the mount points there is nothing we can do. Ever. */
|
|
if (mountpoint.dir == NULL)
|
|
{
|
|
__set_errno (ENOSYS);
|
|
return -1;
|
|
}
|
|
|
|
/* Construct the filename. */
|
|
while (name[0] == '/')
|
|
++name;
|
|
|
|
if (name[0] == '\0')
|
|
{
|
|
/* The name "/" is not supported. */
|
|
__set_errno (ENOENT);
|
|
return -1;
|
|
}
|
|
namelen = strlen (name);
|
|
|
|
/* Create the name of the file. */
|
|
fname = (char *) alloca (mountpoint.dirlen + namelen + 1);
|
|
__mempcpy (__mempcpy (fname, mountpoint.dir, mountpoint.dirlen),
|
|
name, namelen + 1);
|
|
|
|
/* Now try removing it. */
|
|
int ret = unlink (fname);
|
|
if (ret < 0 && errno == EPERM)
|
|
__set_errno (EACCES);
|
|
return ret;
|
|
}
|