mirror of
https://github.com/86Box/bios-tools.git
synced 2026-02-26 05:53:16 -07:00
138 lines
3.6 KiB
C
138 lines
3.6 KiB
C
/*
|
|
* Copyright 2009 Luc Verhaegen <libv@skynet.be>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
/*
|
|
* Test/Example code for LH5 extraction.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <sys/mman.h>
|
|
|
|
#include "lh5_extract.h"
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
char *filename;
|
|
unsigned short header_crc;
|
|
unsigned int header_size, original_size, packed_size;
|
|
int infd, outfd;
|
|
int LHABufferSize = 0;
|
|
unsigned char *LHABuffer, *OutBuffer;
|
|
|
|
if (argc != 2) {
|
|
fprintf(stderr, "Error: archive file not specified\n");
|
|
return 1;
|
|
}
|
|
|
|
/* open archive file */
|
|
infd = open(argv[1], O_RDONLY);
|
|
if (infd == -1) {
|
|
fprintf(stderr, "Error: Failed to open \"%s\": %s\n", argv[1],
|
|
strerror(errno));
|
|
return 1;
|
|
}
|
|
|
|
LHABufferSize = lseek(infd, 0, SEEK_END);
|
|
if (LHABufferSize < 0) {
|
|
fprintf(stderr, "Error: Failed to lseek \"%s\": %s\n", argv[1],
|
|
strerror(errno));
|
|
return 1;
|
|
}
|
|
|
|
LHABuffer = mmap(NULL, LHABufferSize, PROT_READ, MAP_PRIVATE, infd, 0);
|
|
if (LHABuffer == ((void *)-1)) {
|
|
fprintf(stderr, "Error: Failed to mmap %s: %s\n", argv[1],
|
|
strerror(errno));
|
|
return 1;
|
|
}
|
|
|
|
header_size = LH5HeaderParse(LHABuffer, LHABufferSize, &original_size,
|
|
&packed_size, &filename, &header_crc);
|
|
if (!header_size)
|
|
return 1;
|
|
|
|
if ((header_size + packed_size) < LHABufferSize) {
|
|
fprintf(stderr, "Error: LHA archive is bigger than \"%s\".\n",
|
|
argv[1]);
|
|
return 1;
|
|
}
|
|
|
|
outfd = open(filename, O_RDWR | O_TRUNC | O_CREAT, S_IRWXU);
|
|
if (outfd == -1) {
|
|
fprintf(stderr, "Error: Failed to open \"%s\": %s\n", filename,
|
|
strerror(errno));
|
|
return 1;
|
|
}
|
|
|
|
/* grow file */
|
|
if (lseek(outfd, original_size - 1, SEEK_SET) == -1) {
|
|
fprintf(stderr, "Error: Failed to grow \"%s\": %s\n", filename,
|
|
strerror(errno));
|
|
return 1;
|
|
}
|
|
|
|
if (write(outfd, "", 1) != 1) {
|
|
fprintf(stderr, "Error: Failed to write to \"%s\": %s\n",
|
|
filename, strerror(errno));
|
|
return 1;
|
|
}
|
|
|
|
OutBuffer =
|
|
mmap(NULL, original_size, PROT_READ | PROT_WRITE, MAP_SHARED, outfd,
|
|
0);
|
|
if (OutBuffer == ((void *)-1)) {
|
|
fprintf(stderr, "Error: Failed to mmap %s: %s\n", filename,
|
|
strerror(errno));
|
|
return 1;
|
|
}
|
|
|
|
LH5Decode(LHABuffer + header_size, packed_size, OutBuffer,
|
|
original_size);
|
|
|
|
if (CRC16Calculate(OutBuffer, original_size) != header_crc) {
|
|
fprintf(stderr, "Warning: invalid CRC on \"%s\"\n", filename);
|
|
return 1;
|
|
}
|
|
|
|
if (munmap(OutBuffer, original_size))
|
|
fprintf(stderr, "Warning: Failed to munmap \"%s\": %s\n",
|
|
filename, strerror(errno));
|
|
|
|
if (close(outfd))
|
|
fprintf(stderr, "Warning: Failed to close \"%s\": %s\n",
|
|
filename, strerror(errno));
|
|
|
|
free(filename);
|
|
|
|
/* get rid of our input file */
|
|
if (munmap(LHABuffer, LHABufferSize))
|
|
fprintf(stderr, "Warning: Failed to munmap \"%s\": %s\n",
|
|
argv[1], strerror(errno));
|
|
|
|
if (close(infd))
|
|
fprintf(stderr, "Warning: Failed to close \"%s\": %s\n",
|
|
argv[1], strerror(errno));
|
|
|
|
return 0;
|
|
}
|