Add unlink(), mkdir(), rmdir(), and rename()

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@246 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 133 insertions, 0 deletions

diff --git a/nuttx/fs/fs_unlink.c b/nuttx/fs/fs_unlink.c
new file mode 100644
index 000000000..46c7f0cd0
--- /dev/null
+++ b/nuttx/fs/fs_unlink.c
@@ -0,0 +1,133 @@
+/****************************************************************************
+ * fs_unlink.c
+ *
+ *   Copyright (C) 2007 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name Gregory Nutt nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <errno.h>
+#include <nuttx/fs.h>
+
+#include "fs_internal.h"
+
+#if CONFIG_NFILE_DESCRIPTORS > 0
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: unlink
+ *
+ * Description:  Remove a file managed a mountpoint
+ *
+ ****************************************************************************/
+
+int unlink(const char *pathname)
+{
+  FAR struct inode *inode;
+  const char       *relpath = NULL;
+  int               ret;
+
+  /* Get an inode for this file */
+
+  inode = inode_find(pathname, &relpath);
+  if (!inode)
+    {
+      /* There is no mountpoint that includes in this path */
+
+      ret = ENOENT;
+      goto errout;
+    }
+
+  /* Verify that the inode is a valid mountpoint. */
+
+  if (!INODE_IS_MOUNTPT(inode) || !inode->u.i_mops)
+    {
+      ret = ENXIO;
+      goto errout_with_inode;
+    }
+
+  /* Perform the unlink operation using the relative path
+   * at the mountpoint.
+   */
+
+  if (inode->u.i_mops->unlink)
+    {
+      ret = inode->u.i_mops->unlink(inode, relpath);
+      if (ret < 0)
+        {
+          ret = -ret;
+          goto errout_with_inode;
+        }
+    }
+  else
+    { 
+      ret = ENOSYS;
+      goto errout_with_inode;
+    }
+
+  /* Successfully unlinked */
+
+  inode_release(inode);
+  return OK;
+
+ errout_with_inode:
+  inode_release(inode);
+ errout:
+  *get_errno_ptr() = ret;
+  return ERROR;
+}
+
+#endif /* CONFIG_NFILE_DESCRIPTORS */