Subversion Repositories openrisc_2011-10-31

/*

 *  IMFS_create_node()

 *

 *  Routine to create a new in memory file system node.

 *

 *  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.OARcorp.com/rtems/license.html.

 *

 *  $Id: imfs_creat.c,v 1.2 2001-09-27 12:01:15 chris Exp $

 */

#include <assert.h>

#include <stdlib.h>

#include <string.h>

#include "imfs.h"

#include "libio_.h"

IMFS_jnode_t *IMFS_create_node(

  rtems_filesystem_location_info_t  *parent_loc,

  IMFS_jnode_types_t                 type,

  char                              *name,

  mode_t                             mode,

  IMFS_types_union                  *info

)

{

  IMFS_jnode_t        *node;

  struct timeval       tv;

  IMFS_jnode_t        *parent = NULL;

  IMFS_fs_info_t      *fs_info;

  char                *sym_name;

  if ( parent_loc != NULL )

    parent = parent_loc->node_access;

  /*

   *  Allocate an IMFS jnode

   */

  node = calloc( 1, sizeof( IMFS_jnode_t ) );

  if ( !node )

    return NULL;

  /*

   *  Fill in the basic information

   */

  node->st_nlink = 1;

  node->type     = type;

  strncpy( node->name, name, IMFS_NAME_MAX );

  /*

   *  Fill in the mode and permission information for the jnode structure.

   */

  node->st_mode = mode & ~rtems_filesystem_umask;

#if defined(RTEMS_POSIX_API)

  node->st_uid = geteuid();

  node->st_gid = getegid();

#else

  node->st_uid = 0;

  node->st_gid = 0;

#endif

  /*

   *  Now set all the times.

   */

  gettimeofday( &tv, 0 );

  node->stat_atime  = (time_t) tv.tv_sec;

  node->stat_mtime  = (time_t) tv.tv_sec;

  node->stat_ctime  = (time_t) tv.tv_sec;

  /*

   *  Set the type specific information

   */

  switch (type) {

    case IMFS_DIRECTORY:

      Chain_Initialize_empty(&node->info.directory.Entries);

      break;

    case IMFS_HARD_LINK:

      node->info.hard_link.link_node = info->hard_link.link_node;

      break;

    case IMFS_SYM_LINK:

      sym_name = calloc( 1, strlen( info->sym_link.name ) + 1 );

      strcpy( sym_name, info->sym_link.name );

      node->info.sym_link.name = sym_name;

      break;

    case IMFS_DEVICE:

      node->info.device.major = info->device.major;

      node->info.device.minor = info->device.minor;

      break;

    case IMFS_MEMORY_FILE:

      node->info.file.size            = 0;

      node->info.file.indirect        = 0;

      node->info.file.doubly_indirect = 0;

      node->info.file.triply_indirect = 0;

      break;

    default:

      assert(0);

      break;

  }

  /*

   *  If this node has a parent, then put it in that directory list.

   */

  if ( parent ) {

    Chain_Append( &parent->info.directory.Entries, &node->Node );

    node->Parent = parent;

    fs_info = parent_loc->mt_entry->fs_info;

    node->st_ino = ++fs_info->ino_count;

  }

  return node;

}