From ab6462dd56829f5c8344bc2f97ca448e2875e64d Mon Sep 17 00:00:00 2001
From: Rafał Miłecki <zajec5@gmail.com>
Date: Sun, 12 Apr 2015 11:46:11 +0000
Subject: otrx: support for extracting partitions
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
SVN-Revision: 45390
---
package/utils/otrx/src/otrx.c | 128 +++++++++++++++++++++++++++++++++++++++++-
1 file changed, 127 insertions(+), 1 deletion(-)
diff --git a/package/utils/otrx/src/otrx.c b/package/utils/otrx/src/otrx.c
index b3cfdfe55b..2f305cf484 100644
--- a/package/utils/otrx/src/otrx.c
+++ b/package/utils/otrx/src/otrx.c
@@ -27,6 +27,7 @@
#define TRX_MAGIC 0x30524448
#define TRX_FLAGS_OFFSET 12
+#define TRX_MAX_PARTS 3
struct trx_header {
uint32_t magic;
@@ -40,12 +41,14 @@ struct trx_header {
enum mode {
MODE_UNKNOWN,
MODE_CHECK,
+ MODE_EXTRACT,
};
enum mode mode = MODE_UNKNOWN;
char *trx_path;
size_t trx_offset = 0;
+char *partition[TRX_MAX_PARTS] = {};
/**************************************************
* CRC32
@@ -195,6 +198,107 @@ out:
return err;
}
+/**************************************************
+ * Extract
+ **************************************************/
+
+static int otrx_extract_copy(FILE *trx, size_t offset, size_t length, char *out_path) {
+ FILE *out;
+ size_t bytes;
+ uint8_t *buf;
+ int err = 0;
+
+ out = fopen(out_path, "w");
+ if (!out) {
+ fprintf(stderr, "Couldn't open %s\n", out_path);
+ err = -EACCES;
+ goto out;
+ }
+
+ buf = malloc(length);
+ if (!buf) {
+ fprintf(stderr, "Couldn't alloc %zu B buffer\n", length);
+ err = -ENOMEM;
+ goto err_close;
+ }
+
+ fseek(trx, offset, SEEK_SET);
+ bytes = fread(buf, 1, length, trx);
+ if (bytes != length) {
+ fprintf(stderr, "Couldn't read %zu B of data from %s\n", length, trx_path);
+ err = -ENOMEM;
+ goto err_free_buf;
+ };
+
+ bytes = fwrite(buf, 1, length, out);
+ if (bytes != length) {
+ fprintf(stderr, "Couldn't write %zu B to %s\n", length, out_path);
+ err = -ENOMEM;
+ goto err_free_buf;
+ }
+
+ printf("Extracted 0x%zx bytes into %s\n", length, out_path);
+
+err_free_buf:
+ free(buf);
+err_close:
+ fclose(out);
+out:
+ return err;
+}
+
+static int otrx_extract() {
+ FILE *trx;
+ struct trx_header hdr;
+ size_t bytes;
+ int i;
+ int err = 0;
+
+ trx = fopen(trx_path, "r");
+ if (!trx) {
+ fprintf(stderr, "Couldn't open %s\n", trx_path);
+ err = -EACCES;
+ goto out;
+ }
+
+ fseek(trx, trx_offset, SEEK_SET);
+ bytes = fread(&hdr, 1, sizeof(hdr), trx);
+ if (bytes != sizeof(hdr)) {
+ fprintf(stderr, "Couldn't read %s header\n", trx_path);
+ err = -EIO;
+ goto err_close;
+ }
+
+ if (le32_to_cpu(hdr.magic) != TRX_MAGIC) {
+ fprintf(stderr, "Invalid TRX magic: 0x%08x\n", le32_to_cpu(hdr.magic));
+ err = -EINVAL;
+ goto err_close;
+ }
+
+ for (i = 0; i < TRX_MAX_PARTS; i++) {
+ size_t length;
+
+ if (!partition[i])
+ continue;
+ if (!hdr.offset[i]) {
+ printf("TRX doesn't contain partition %d, can't extract %s\n", i + 1, partition[i]);
+ continue;
+ }
+
+ if (i + 1 >= TRX_MAX_PARTS || !hdr.offset[i + 1])
+ length = le32_to_cpu(hdr.length) - le32_to_cpu(hdr.offset[i]);
+ else
+ length = le32_to_cpu(hdr.offset[i + 1]) - le32_to_cpu(hdr.offset[i]);
+
+ otrx_extract_copy(trx, trx_offset + le32_to_cpu(hdr.offset[i]), length, partition[i]);
+ }
+
+err_close:
+ fclose(trx);
+out:
+ return err;
+}
+
/**************************************************
* Start
**************************************************/
@@ -202,15 +306,28 @@ out:
static void parse_options(int argc, char **argv) {
int c;
- while ((c = getopt(argc, argv, "c:o:")) != -1) {
+ while ((c = getopt(argc, argv, "c:e:o:1:2:3:")) != -1) {
switch (c) {
case 'c':
mode = MODE_CHECK;
trx_path = optarg;
break;
+ case 'e':
+ mode = MODE_EXTRACT;
+ trx_path = optarg;
+ break;
case 'o':
trx_offset = atoi(optarg);
break;
+ case '1':
+ partition[0] = optarg;
+ break;
+ case '2':
+ partition[1] = optarg;
+ break;
+ case '3':
+ partition[2] = optarg;
+ break;
}
}
}
@@ -221,6 +338,13 @@ static void usage() {
printf("Checking TRX file:\n");
printf("\t-c file\t\tcheck if file is a valid TRX\n");
printf("\t-o offset\toffset of TRX data in file (default: 0)\n");
+ printf("\n");
+ printf("Extracting from TRX file:\n");
+ printf("\t-e file\t\tfile with TRX to extract from\n");
+ printf("\t-o offset\toffset of TRX data in file (default: 0)\n");
+ printf("\t-1 file\t\tfile to extract 1st partition to (optional)\n");
+ printf("\t-2 file\t\tfile to extract 2nd partition to (optional)\n");
+ printf("\t-3 file\t\tfile to extract 3rd partition to (optional)\n");
}
int main(int argc, char **argv) {
@@ -229,6 +353,8 @@ int main(int argc, char **argv) {
switch (mode) {
case MODE_CHECK:
return otrx_check();
+ case MODE_EXTRACT:
+ return otrx_extract();
default:
usage();
}
--
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