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/*
* IMFS_create_node()
*
* Routine to create a new in memory file system node.
*
* COPYRIGHT (c) 1989-2010.
* 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 "imfs.h"
#include <stdlib.h>
#include <string.h>
/*
* Create an IMFS filesystem node of an arbitrary type that is NOT
* the root directory node.
*/
IMFS_jnode_t *IMFS_create_node(
const rtems_filesystem_location_info_t *parent_loc,
IMFS_jnode_types_t type,
const char *name,
size_t namelen,
mode_t mode,
const IMFS_types_union *info
)
{
IMFS_jnode_t *node;
IMFS_jnode_t *parent;
IMFS_fs_info_t *fs_info;
IMFS_assert( parent_loc != NULL );
parent = parent_loc->node_access;
fs_info = parent_loc->mt_entry->fs_info;
/*
* Reject creation of FIFOs if support is disabled.
*/
if ( type == IMFS_FIFO &&
fs_info->fifo_handlers == &rtems_filesystem_handlers_default ) {
errno = ENOTSUP;
return NULL;
}
/*
* Allocate filesystem node and fill in basic information
*/
node = IMFS_allocate_node( type, name, namelen, mode );
if ( !node )
return NULL;
/*
* Set the type specific information
*/
if ( type == IMFS_DIRECTORY ) {
rtems_chain_initialize_empty(&node->info.directory.Entries);
} else if ( type == IMFS_HARD_LINK ) {
node->info.hard_link.link_node = info->hard_link.link_node;
} else if ( type == IMFS_SYM_LINK ) {
node->info.sym_link.name = info->sym_link.name;
} else if ( type == IMFS_DEVICE ) {
node->info.device.major = info->device.major;
node->info.device.minor = info->device.minor;
} else if ( type == IMFS_LINEAR_FILE ) {
node->info.linearfile.size = 0;
node->info.linearfile.direct = 0;
} else if ( type == 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;
} else if ( type == IMFS_FIFO ) {
node->info.fifo.pipe = NULL;
} else {
IMFS_assert(0);
}
/*
* This node MUST have a parent, so put it in that directory list.
*/
node->Parent = parent;
node->st_ino = ++fs_info->ino_count;
rtems_chain_append( &parent->info.directory.Entries, &node->Node );
return node;
}
/*
* Allocate filesystem node and fill in basic information
*/
IMFS_jnode_t *IMFS_allocate_node(
IMFS_jnode_types_t type,
const char *name,
size_t namelen,
mode_t mode
)
{
IMFS_jnode_t *node;
struct timeval tv;
if ( namelen > IMFS_NAME_MAX ) {
errno = ENAMETOOLONG;
return NULL;
}
/*
* Allocate an IMFS jnode
*/
node = calloc( 1, sizeof( IMFS_jnode_t ) );
if ( !node ) {
errno = ENOMEM;
return NULL;
}
/*
* Fill in the basic information
*/
node->st_nlink = 1;
node->type = type;
memcpy( node->name, name, namelen );
node->name [namelen] = '\0';
/*
* Fill in the mode and permission information for the jnode structure.
*/
node->st_mode = mode;
#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;
return node;
}
IMFS_jnode_t *IMFS_create_root_node(void)
{
IMFS_jnode_t *node;
/*
* Allocate filesystem node and fill in basic information
*/
node = IMFS_allocate_node( IMFS_DIRECTORY, "", 0, (S_IFDIR | 0755) );
if ( !node )
return NULL;
/*
* Set the type specific information
*
* NOTE: Root node is always a directory.
*/
rtems_chain_initialize_empty(&node->info.directory.Entries);
return node;
}
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