| /* Copyright (C) 2002-2014 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; |
| } |