2003-11-25 Jennifer Averett <jennifer@OARcorp.com>

PR 519/filesystem
	* include/rtems/libio_.h, src/eval.c, src/rmdir.c, src/unlink.c: Check
	write permissions in parent directory for file or directory delete

cpukit/libcsupport/ChangeLog

@@ -1,3 +1,9 @@
+2003-11-25	Jennifer Averett <jennifer@OARcorp.com>
+
+	PR 519/filesystem
+	* include/rtems/libio_.h, src/eval.c, src/rmdir.c, src/unlink.c: Check
+	write permissions in parent directory for file or directory delete
+
 2003-11-22	Ralf Corsepius <corsepiu@faw.uni-ulm.de>
 
 	* include/rtems/cdefs.h: Use _RTEMS_CDEFS_H guards.

cpukit/libcsupport/include/rtems/libio_.h

@@ -227,6 +227,11 @@ int rtems_filesystem_evaluate_path(
   int                                follow_link
 );
 
+int rtems_filesystem_evaluate_parent(
+  int                                flags,
+  rtems_filesystem_location_info_t  *pathloc
+);
+
 void rtems_filesystem_initialize();
 
 int init_fs_mount_table();

cpukit/libcsupport/src/eval.c

@@ -97,3 +97,28 @@ int rtems_filesystem_evaluate_path(
   return result;
 }
 
+
+int rtems_filesystem_evaluate_parent(
+  int                                flags,
+  rtems_filesystem_location_info_t  *pathloc
+)
+{
+  rtems_filesystem_location_info_t  parent;
+  int                               result;
+
+  if ( !pathloc )
+    rtems_set_errno_and_return_minus_one( EIO );       /* should never happen */
+  
+  if ( !pathloc->ops->evalpath_h )
+    rtems_set_errno_and_return_minus_one( ENOTSUP );
+
+  parent = *pathloc;
+  result = (*pathloc->ops->evalpath_h)( "..", flags, &parent );
+  if (result != 0){
+    return -1;
+  }
+  rtems_filesystem_freenode( &parent );
+
+  return result;
+}
+

cpukit/libcsupport/src/rmdir.c

@@ -39,6 +39,12 @@ int rmdir(
   if ( result != 0 )
      return -1;
 
+  result = rtems_filesystem_evaluate_parent(RTEMS_LIBIO_PERMS_WRITE, &loc );
+  if (result != 0){
+    rtems_filesystem_freenode( &loc );
+    return -1;
+  }
+
   /*
    * Verify you can remove this node as a directory.
    */

cpukit/libcsupport/src/unlink.c

@@ -35,6 +35,12 @@ int unlink(
   if ( result != 0 )
      return -1;
   
+  result = rtems_filesystem_evaluate_parent(RTEMS_LIBIO_PERMS_WRITE, &loc );
+  if (result != 0){
+    rtems_filesystem_freenode( &loc );
+    return -1;
+  }
+
   if ( !loc.ops->node_type_h ) {
     rtems_filesystem_freenode( &loc );
     rtems_set_errno_and_return_minus_one( ENOTSUP );