otrx: support for extracting partitions
Signed-off-by: Rafał Miłecki <zajec5@gmail.com> git-svn-id: svn://svn.openwrt.org/openwrt/trunk@45390 3c298f89-4303-0410-b956-a3cf2f4a3e73master
Rafał Miłecki
parent
f1e93b5907
commit
99ad5c9c91
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@ -27,6 +27,7 @@
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#define TRX_MAGIC 0x30524448
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#define TRX_FLAGS_OFFSET 12
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#define TRX_MAX_PARTS 3
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struct trx_header {
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uint32_t magic;
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@ -40,12 +41,14 @@ struct trx_header {
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enum mode {
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MODE_UNKNOWN,
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MODE_CHECK,
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MODE_EXTRACT,
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};
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enum mode mode = MODE_UNKNOWN;
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char *trx_path;
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size_t trx_offset = 0;
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char *partition[TRX_MAX_PARTS] = {};
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/**************************************************
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* CRC32
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@ -195,6 +198,107 @@ out:
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return err;
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}
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/**************************************************
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* Extract
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**************************************************/
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static int otrx_extract_copy(FILE *trx, size_t offset, size_t length, char *out_path) {
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FILE *out;
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size_t bytes;
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uint8_t *buf;
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int err = 0;
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out = fopen(out_path, "w");
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if (!out) {
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fprintf(stderr, "Couldn't open %s\n", out_path);
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err = -EACCES;
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goto out;
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}
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buf = malloc(length);
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if (!buf) {
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fprintf(stderr, "Couldn't alloc %zu B buffer\n", length);
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err = -ENOMEM;
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goto err_close;
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}
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fseek(trx, offset, SEEK_SET);
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bytes = fread(buf, 1, length, trx);
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if (bytes != length) {
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fprintf(stderr, "Couldn't read %zu B of data from %s\n", length, trx_path);
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err = -ENOMEM;
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goto err_free_buf;
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};
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bytes = fwrite(buf, 1, length, out);
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if (bytes != length) {
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fprintf(stderr, "Couldn't write %zu B to %s\n", length, out_path);
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err = -ENOMEM;
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goto err_free_buf;
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}
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printf("Extracted 0x%zx bytes into %s\n", length, out_path);
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err_free_buf:
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free(buf);
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err_close:
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fclose(out);
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out:
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return err;
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}
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static int otrx_extract() {
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FILE *trx;
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struct trx_header hdr;
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size_t bytes;
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int i;
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int err = 0;
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trx = fopen(trx_path, "r");
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if (!trx) {
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fprintf(stderr, "Couldn't open %s\n", trx_path);
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err = -EACCES;
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goto out;
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}
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fseek(trx, trx_offset, SEEK_SET);
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bytes = fread(&hdr, 1, sizeof(hdr), trx);
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if (bytes != sizeof(hdr)) {
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fprintf(stderr, "Couldn't read %s header\n", trx_path);
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err = -EIO;
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goto err_close;
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}
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if (le32_to_cpu(hdr.magic) != TRX_MAGIC) {
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fprintf(stderr, "Invalid TRX magic: 0x%08x\n", le32_to_cpu(hdr.magic));
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err = -EINVAL;
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goto err_close;
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}
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for (i = 0; i < TRX_MAX_PARTS; i++) {
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size_t length;
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if (!partition[i])
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continue;
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if (!hdr.offset[i]) {
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printf("TRX doesn't contain partition %d, can't extract %s\n", i + 1, partition[i]);
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continue;
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}
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if (i + 1 >= TRX_MAX_PARTS || !hdr.offset[i + 1])
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length = le32_to_cpu(hdr.length) - le32_to_cpu(hdr.offset[i]);
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else
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length = le32_to_cpu(hdr.offset[i + 1]) - le32_to_cpu(hdr.offset[i]);
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otrx_extract_copy(trx, trx_offset + le32_to_cpu(hdr.offset[i]), length, partition[i]);
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}
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err_close:
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fclose(trx);
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out:
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return err;
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}
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/**************************************************
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* Start
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**************************************************/
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@ -202,15 +306,28 @@ out:
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static void parse_options(int argc, char **argv) {
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int c;
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while ((c = getopt(argc, argv, "c:o:")) != -1) {
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while ((c = getopt(argc, argv, "c:e:o:1:2:3:")) != -1) {
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switch (c) {
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case 'c':
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mode = MODE_CHECK;
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trx_path = optarg;
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break;
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case 'e':
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mode = MODE_EXTRACT;
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trx_path = optarg;
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break;
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case 'o':
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trx_offset = atoi(optarg);
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break;
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case '1':
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partition[0] = optarg;
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break;
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case '2':
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partition[1] = optarg;
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break;
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case '3':
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partition[2] = optarg;
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break;
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}
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}
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}
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@ -221,6 +338,13 @@ static void usage() {
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printf("Checking TRX file:\n");
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printf("\t-c file\t\tcheck if file is a valid TRX\n");
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printf("\t-o offset\toffset of TRX data in file (default: 0)\n");
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printf("\n");
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printf("Extracting from TRX file:\n");
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printf("\t-e file\t\tfile with TRX to extract from\n");
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printf("\t-o offset\toffset of TRX data in file (default: 0)\n");
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printf("\t-1 file\t\tfile to extract 1st partition to (optional)\n");
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printf("\t-2 file\t\tfile to extract 2nd partition to (optional)\n");
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printf("\t-3 file\t\tfile to extract 3rd partition to (optional)\n");
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}
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int main(int argc, char **argv) {
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@ -229,6 +353,8 @@ int main(int argc, char **argv) {
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switch (mode) {
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case MODE_CHECK:
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return otrx_check();
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case MODE_EXTRACT:
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return otrx_extract();
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default:
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usage();
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}
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