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/*
* IMFS file change mode routine.
*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <errno.h>
#include <rtems/libio_.h>
#include <rtems/seterr.h>
#include "imfs.h"
int IMFS_fchmod(
rtems_filesystem_location_info_t *loc,
mode_t mode
)
{
IMFS_jnode_t *jnode;
#if defined(RTEMS_POSIX_API)
uid_t st_uid;
#endif
int IMFS_memfile_write(
IMFS_jnode_t *the_jnode,
off_t start,
const unsigned char *source,
unsigned int length
);
jnode = loc->node_access;
/*
* Verify I am the owner of the node or the super user.
*/
#if defined(RTEMS_POSIX_API)
st_uid = geteuid();
if ( ( st_uid != jnode->st_uid ) && ( st_uid != 0 ) )
rtems_set_errno_and_return_minus_one( EPERM );
#endif
/*
* Change only the RWX permissions on the jnode to mode.
*/
if ( mode & (~ (S_IRWXU | S_IRWXG | S_IRWXO ) ) )
rtems_set_errno_and_return_minus_one( EPERM );
jnode->st_mode &= ~(S_IRWXU | S_IRWXG | S_IRWXO);
jnode->st_mode |= mode;
IMFS_update_ctime( jnode );
return 0;
}
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