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/**
* @file
*
* @brief RTEMS Load Tarfs
* @ingroup IMFS
*/
/*
* 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.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/imfs.h>
#include <rtems/untar.h>
#include <string.h>
int rtems_tarfs_load(
const char *mountpoint,
uint8_t *tar_image,
size_t tar_size
)
{
rtems_filesystem_eval_path_context_t eval_ctx;
int eval_flags;
rtems_filesystem_location_info_t *loc;
bool is_imfs;
char buf[ 156 + UNTAR_FILE_NAME_SIZE ];
size_t len;
Untar_HeaderContext ctx;
unsigned long ptr;
len = strlen( mountpoint );
if ( len >= sizeof( buf ) - UNTAR_FILE_NAME_SIZE - 2 ) {
return -1;
}
eval_flags = RTEMS_FS_FOLLOW_LINK;
loc = rtems_filesystem_eval_path_start( &eval_ctx, mountpoint, eval_flags );
is_imfs = IMFS_is_imfs_instance( loc );
rtems_filesystem_eval_path_cleanup( &eval_ctx );
if ( !is_imfs ) {
return -1;
}
ctx.printer = NULL;
ctx.file_path = memcpy( buf, mountpoint, len );
if ( len > 0 && ctx.file_path[ len - 1 ] != '/') {
ctx.file_path[ len ] = '/';
ctx.file_name = ctx.file_path + len + 1;
} else {
ctx.file_name = ctx.file_path + len;
}
ptr = 0;
while ( ptr + 512 <= tar_size ) {
int retval;
retval = Untar_ProcessHeader( &ctx, (const char *) &tar_image[ ptr ] );
if ( retval != UNTAR_SUCCESSFUL ) {
return -1;
}
ptr += 512;
if ( ctx.linkflag == REGTYPE ) {
retval = IMFS_make_linearfile(
ctx.file_path,
ctx.mode,
&tar_image[ ptr ],
ctx.file_size
);
if ( retval != 0 ) {
return -1;
}
ptr += 512 * ctx.nblocks;
}
}
return 0;
}
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