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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 by William Poetra Yoga Hadisoeseno
*
* 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
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <libgen.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
void usage()
{
fprintf(stderr, "usage: IHFSsplit <ihfs_img> <output_dir>\n");
exit(1);
}
typedef struct {
uint32_t signature;
uint32_t fslen;
uint32_t unknown1;
uint32_t unknown2;
char timestamp[12];
uint32_t numfiles;
char zeros[476];
uint32_t marker;
} ihfs_header_t;
#define MAX_FILES 2048
#define MAX_IHFS_PATH 56
typedef struct {
struct {
char fullpath[MAX_IHFS_PATH];
uint32_t sector;
uint32_t length;
} files[MAX_FILES];
} ihfs_file_table_t;
#define SECTOR_SIZE 512
int ihfs_sanity(const int ihfs_img)
{
struct stat statbuf;
ihfs_header_t ihfs_hdr;
printf("starting sanity check for IHFS image...\n");
lseek(ihfs_img, 0, SEEK_SET);
read(ihfs_img, &ihfs_hdr, sizeof (ihfs_hdr));
printf(" checking for IHFS signature...\n");
if (ihfs_hdr.signature != 0x49484653)
return 1;
printf(" checking for FS length...\n");
fstat(ihfs_img, &statbuf);
if (ihfs_hdr.fslen * SECTOR_SIZE != statbuf.st_size)
return 1;
printf(" checking for unknown value 1...\n");
if (ihfs_hdr.unknown1 != 0x00000004)
return 1;
printf(" checking for unknown value 2...\n");
if (ihfs_hdr.unknown2 != 0xfffff000)
return 1;
printf(" checking for number of files...\n");
if (ihfs_hdr.numfiles > MAX_FILES)
return 1;
printf(" checking for marker...\n");
if (ihfs_hdr.marker != 0x55aa55aa)
return 1;
return 0;
}
void mkdir_p(const char *path)
{
char *dir;
dir = dirname(strdup(path));
if (strchr(dir, '/'))
mkdir_p(dir);
#ifdef _WIN32
mkdir(dir);
#else
mkdir(dir, 0755);
#endif
}
#define BUF_SIZE 4096
void outputfile(const char *outpath, const int ihfs_img, const int offset, const int length)
{
int outfd;
int i, rem;
char buf[BUF_SIZE];
lseek(ihfs_img, offset, SEEK_SET);
outfd = creat(outpath, 0644);
for (i = 0; i < length / BUF_SIZE; ++i) {
read(ihfs_img, buf, BUF_SIZE);
write(outfd, buf, BUF_SIZE);
}
rem = length - i * BUF_SIZE;
if (rem > 0) {
read(ihfs_img, buf, rem);
write(outfd, buf, rem);
}
close(outfd);
}
int main(int argc, char **argv)
{
struct stat statbuf;
int ihfs_img;
ihfs_header_t ihfs_hdr;
ihfs_file_table_t ihfs_ftbl;
int i, j;
char *outpath, *base_path, ihfs_path[MAX_IHFS_PATH+1];
/* check the arguments */
if (argc != 3)
usage();
stat(argv[1], &statbuf);
if (!S_ISREG(statbuf.st_mode))
usage();
stat(argv[2], &statbuf);
if (!S_ISDIR(statbuf.st_mode))
usage();
/* check the file, then split */
ihfs_img = open(argv[1], O_RDONLY);
if (ihfs_sanity(ihfs_img)) {
printf("Non-IHFS format!\n");
return 1;
} else
printf("sanity check OK\n");
lseek(ihfs_img, 0, SEEK_SET);
read(ihfs_img, &ihfs_hdr, sizeof (ihfs_hdr));
lseek(ihfs_img, 4 * SECTOR_SIZE, SEEK_SET);
read(ihfs_img, &ihfs_ftbl, sizeof (ihfs_ftbl));
base_path = strdup(argv[2]);
outpath = malloc(strlen(base_path) + 1 + MAX_IHFS_PATH + 1);
for (i = 0; i < ihfs_hdr.numfiles; ++i) {
printf("\n");
printf("pathname: %s\n", ihfs_ftbl.files[i].fullpath);
printf("starts at sector %d, length is %d bytes\n", ihfs_ftbl.files[i].sector, ihfs_ftbl.files[i].length);
strncpy(ihfs_path, ihfs_ftbl.files[i].fullpath, MAX_IHFS_PATH);
ihfs_path[MAX_IHFS_PATH] = '\0';
for (j = 0; j < strlen(ihfs_path); ++j)
if (ihfs_path[j] == '\\')
ihfs_path[j] = '/';
sprintf(outpath, "%s/%s", base_path, ihfs_path);
mkdir_p(outpath);
outputfile(outpath, ihfs_img, ihfs_ftbl.files[i].sector * SECTOR_SIZE, ihfs_ftbl.files[i].length);
}
free(outpath);
close(ihfs_img);
return 0;
}
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