forked from Imagelibrary/rtems
115 lines
3.2 KiB
C
115 lines
3.2 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/**
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* @file
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*
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* @ingroup IMFS
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*
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* @brief RTEMS Load Tarfs
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*/
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/*
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* COPYRIGHT (c) 1989-2010.
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* On-Line Applications Research Corporation (OAR).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <rtems/imfs.h>
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#include <rtems/untar.h>
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#include <string.h>
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int rtems_tarfs_load(
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const char *mountpoint,
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const void *tar_image,
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size_t tar_size
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)
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{
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rtems_filesystem_eval_path_context_t eval_ctx;
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int eval_flags;
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rtems_filesystem_location_info_t *loc;
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bool is_imfs;
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char buf[ 156 + UNTAR_FILE_NAME_SIZE ];
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size_t len;
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Untar_HeaderContext ctx;
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unsigned long ptr;
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const uint8_t *image;
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len = strlen( mountpoint );
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if ( len >= sizeof( buf ) - UNTAR_FILE_NAME_SIZE - 2 ) {
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return -1;
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}
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eval_flags = RTEMS_FS_FOLLOW_LINK;
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loc = rtems_filesystem_eval_path_start( &eval_ctx, mountpoint, eval_flags );
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is_imfs = IMFS_is_imfs_instance( loc );
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rtems_filesystem_eval_path_cleanup( &eval_ctx );
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if ( !is_imfs ) {
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return -1;
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}
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ctx.printer = NULL;
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ctx.file_path = memcpy( buf, mountpoint, len );
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if ( len > 0 && ctx.file_path[ len - 1 ] != '/') {
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ctx.file_path[ len ] = '/';
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ctx.file_name = ctx.file_path + len + 1;
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} else {
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ctx.file_name = ctx.file_path + len;
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}
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ptr = 0;
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image = tar_image;
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while ( ptr + 512 <= tar_size ) {
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int retval;
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retval = Untar_ProcessHeader( &ctx, (const char *) &image[ ptr ] );
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if ( retval != UNTAR_SUCCESSFUL ) {
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return -1;
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}
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ptr += 512;
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if ( ctx.linkflag == REGTYPE ) {
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retval = IMFS_make_linearfile(
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ctx.file_path,
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ctx.mode,
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&image[ ptr ],
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ctx.file_size
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);
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if ( retval != 0 ) {
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return -1;
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}
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ptr += 512 * ctx.nblocks;
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}
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}
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return 0;
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}
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