/* Copyright (C) 2002, 2004 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 ( const char *name) { char *fname; size_t namelen; /* Determine where the shmfs is mounted. */ INTUSE(__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; }