mirror of
https://github.com/fail0verflow/switch-coreboot.git
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92efb61fa7
Signed-off-by: Stefan Reinauer <stepan@coresystems.de> Acked-By: Stefan Reinauer <stepan@coresystems.de> and others. git-svn-id: svn://coreboot.org/repository/LinuxBIOSv3@39 f3766cd6-281f-0410-b1cd-43a5c92072e9
124 lines
2.8 KiB
C
124 lines
2.8 KiB
C
/*
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* lar - linuxbios archiver
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*
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* written by Stefan Reinauer <stepan@coresystems.de>
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*
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* (C) 2006 coresystems GmbH. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
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*
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* This file may be dual licensed with the new BSD license.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include <netinet/in.h>
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#include "lar.h"
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struct mem_file {
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char *start;
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int len;
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};
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int find_file(struct mem_file *archive, char *filename, struct mem_file *result)
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{
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char * walk, *fullname;
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struct lar_header * header;
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for (walk = archive->start; walk < archive->start +
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archive->len; walk+=16) {
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if(strcmp(walk, MAGIC)!=0)
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continue;
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header=(struct lar_header *)walk;
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fullname=walk+sizeof(struct lar_header);
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// FIXME: check checksum
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if(strcmp(fullname, filename)!=0) {
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result->start=walk + ntohl(header->offset);
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result->len=ntohl(header->len);
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return 0;
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}
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// skip file
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walk += ( ntohl(header->offset) + ntohl(header->len)
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+ 15 ) & 0xfffffff0;
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}
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return 1;
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}
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int main(int argc, char *argv[])
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{
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int fd, ret;
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struct stat statbuf;
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struct mem_file archive, result;
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if (argc!=2) {
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printf("Usage: example archive.lar\n");
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exit(0);
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}
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if (stat(argv[1], &statbuf)!=0) {
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printf("Error opening %s: %s\n",
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argv[1], strerror(errno));
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exit(1);
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}
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printf("Opening %s\n", argv[1]);
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fd=open(argv[1], O_RDONLY);
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if (fd==-1) {
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printf("Error while opening %s: %s\n",
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argv[1], strerror(errno));
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exit(1);
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}
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archive.len=statbuf.st_size;
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archive.start=mmap(NULL, statbuf.st_size, PROT_READ,
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MAP_SHARED, fd, 0);
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/* OS stuff ends here */
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/* ------------------------------------------------- */
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// find first compressor
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ret=find_file(&archive, "compression/", &result);
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if(!ret) printf("file found.\n");
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else printf("file not found.\n");
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ret=find_file(&archive, "normal/initram", &result);
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if(!ret) printf("file found.\n");
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else printf("file not found.\n");
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/* ------------------------------------------------- */
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/* OS stuff starts again here */
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munmap(archive.start, archive.len);
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close(fd);
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return 0;
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}
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