/**
* @file
*
* @brief IMFS Create a New Symbolic Link Node
* @ingroup IMFS
*/
/*
* COPYRIGHT (c) 1989-2009.
* 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.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include "imfs.h"
#include <stdlib.h>
#include <string.h>
static const IMFS_node_control IMFS_node_control_sym_link;
int IMFS_symlink(
const rtems_filesystem_location_info_t *parentloc,
const char *name,
size_t namelen,
const char *target
)
{
char *dup_target;
IMFS_jnode_t *new_node;
/*
* Duplicate link name
*/
dup_target = strdup(target);
if (dup_target == NULL) {
rtems_set_errno_and_return_minus_one(ENOMEM);
}
/*
* Create a new link node.
*/
new_node = IMFS_create_node(
parentloc,
&IMFS_node_control_sym_link,
sizeof( IMFS_sym_link_t ),
name,
namelen,
( S_IFLNK | ( S_IRWXU | S_IRWXG | S_IRWXO )),
dup_target
);
if (new_node == NULL) {
free(dup_target);
rtems_set_errno_and_return_minus_one(ENOMEM);
}
return 0;
}
ssize_t IMFS_readlink(
const rtems_filesystem_location_info_t *loc,
char *buf,
size_t bufsize
)
{
IMFS_sym_link_t *sym_link;
ssize_t i;
sym_link = loc->node_access;
for( i=0; ((i<bufsize) && (sym_link->name[i] != '\0')); i++ )
buf[i] = sym_link->name[i];
return i;
}
static int IMFS_stat_sym_link(
const rtems_filesystem_location_info_t *loc,
struct stat *buf
)
{
const IMFS_sym_link_t *sym_link = loc->node_access;
buf->st_size = strlen( sym_link->name );
return IMFS_stat( loc, buf );
}
static const rtems_filesystem_file_handlers_r IMFS_link_handlers = {
.open_h = rtems_filesystem_default_open,
.close_h = rtems_filesystem_default_close,
.read_h = rtems_filesystem_default_read,
.write_h = rtems_filesystem_default_write,
.ioctl_h = rtems_filesystem_default_ioctl,
.lseek_h = rtems_filesystem_default_lseek,
.fstat_h = IMFS_stat_sym_link,
.ftruncate_h = rtems_filesystem_default_ftruncate,
.fsync_h = rtems_filesystem_default_fsync_or_fdatasync,
.fdatasync_h = rtems_filesystem_default_fsync_or_fdatasync,
.fcntl_h = rtems_filesystem_default_fcntl,
.kqfilter_h = rtems_filesystem_default_kqfilter,
.poll_h = rtems_filesystem_default_poll,
.readv_h = rtems_filesystem_default_readv,
.writev_h = rtems_filesystem_default_writev
};
static IMFS_jnode_t *IMFS_node_initialize_sym_link(
IMFS_jnode_t *node,
void *arg
)
{
IMFS_sym_link_t *sym_link = (IMFS_sym_link_t *) node;
sym_link->name = arg;
return node;
}
static void IMFS_node_destroy_sym_link( IMFS_jnode_t *node )
{
IMFS_sym_link_t *sym_link = (IMFS_sym_link_t *) node;
free( sym_link->name );
IMFS_node_destroy_default( node );
}
static const IMFS_node_control IMFS_node_control_sym_link = {
.handlers = &IMFS_link_handlers,
.node_initialize = IMFS_node_initialize_sym_link,
.node_remove = IMFS_node_remove_default,
.node_destroy = IMFS_node_destroy_sym_link
};