107 lines
2.0 KiB
C
107 lines
2.0 KiB
C
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/*
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* split LOAD/Flash images from Siemens SE505
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*
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* (c) 01/2005 Olaf Rempel <razzor at kopf minus tisch dot de>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#define __USE_GNU
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#include <string.h>
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#include <sys/types.h>
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#include "trxhdr.h"
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#define BUFSIZE 32768
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#define CRAMFS_MAGIC "\x45\x3D\xCD\x28"
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int main(int argc, char *argv[]) {
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struct trx_header trx;
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int len, cnt;
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FILE *fp, *out;
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char *buf, *p, filename[128];
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u_int32_t *fs;
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if (argc <= 1) {
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printf("USAGE: split_linux linux.trx\n");
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exit(-1);
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}
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// open file
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if ((fp = fopen(argv[1], "r")) < 0) {
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perror(argv[1]);
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exit(-1);
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}
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// read main header
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if ((cnt = fread(&trx, 1, sizeof(struct trx_header), fp)) < 0) {
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perror(argv[1]);
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fclose(fp);
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exit(-1);
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} else if (cnt < sizeof(struct trx_header)) {
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fprintf(stderr, "Truncated file: %s\n", argv[1]);
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fclose(fp);
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exit(-1);
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} else if (trx.magic != TRX_MAGIC || trx.len > TRX_MAX_LEN || trx.len < sizeof(struct trx_header)) {
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fprintf(stderr, "Bad TRX Header: %s\n", argv[1]);
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fclose(fp);
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exit(-1);
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}
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len = trx.len - sizeof(struct trx_header);
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// big & ugly
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if ((buf = malloc(TRX_MAX_LEN)) == NULL) {
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perror("malloc");
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exit(-1);
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}
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// slurp in
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len = fread(buf, 1, TRX_MAX_LEN, fp);
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// search header
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if ((p = memmem(buf, len, CRAMFS_MAGIC, 4)) == NULL) {
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fprintf(stderr, "No CRAMFS Header found\n");
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free(buf);
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fclose(fp);
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exit(-1);
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}
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cnt = (int)(p - buf);
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// open file
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snprintf(filename, sizeof(filename), "%s.kernel", argv[1]);
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if ((out = fopen(filename, "w")) < 0) {
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perror(filename);
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free(buf);
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exit(-1);
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}
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printf("%s: %d bytes\n", filename, cnt);
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fwrite(buf, 1, cnt, out);
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fclose(out);
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// open file
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snprintf(filename, sizeof(filename), "%s.cramfs", argv[1]);
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if ((out = fopen(filename, "w")) < 0) {
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perror(filename);
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free(buf);
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exit(-1);
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}
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// "echte" fs laenge auslesen
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fs = (u_int32_t *)(p +4);
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printf("%s: %d bytes\n", filename, *fs);
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fwrite(p, 1, *fs, out);
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fclose(out);
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free(buf);
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fclose(fp);
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return 0;
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}
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