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-rw-r--r--libpthread/nptl/sem_unlink.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/libpthread/nptl/sem_unlink.c b/libpthread/nptl/sem_unlink.c
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+++ b/libpthread/nptl/sem_unlink.c
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+/* 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#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. */
+ __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;
+}