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authorRafał Miłecki <zajec5@gmail.com>2015-04-14 20:50:53 +0000
committerRafał Miłecki <zajec5@gmail.com>2015-04-14 20:50:53 +0000
commit9f3b827af2a4702fb5c9d4398249dd4af53909a9 (patch)
treebfb7edc0cffc0df924b6e4132d77c794c8cf1702 /package
parent0d8a721eb1954e6e8e8e491f669bf7e4a4d3353e (diff)
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otrx: support for creating simple TRX files
Signed-off-by: Rafał Miłecki <zajec5@gmail.com> git-svn-id: svn://svn.openwrt.org/openwrt/trunk@45444 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'package')
-rw-r--r--package/utils/otrx/src/otrx.c185
1 files changed, 185 insertions, 0 deletions
diff --git a/package/utils/otrx/src/otrx.c b/package/utils/otrx/src/otrx.c
index 25e0592737..fbdad31912 100644
--- a/package/utils/otrx/src/otrx.c
+++ b/package/utils/otrx/src/otrx.c
@@ -221,6 +221,184 @@ out:
}
/**************************************************
+ * Create
+ **************************************************/
+
+static void otrx_create_parse_options(int argc, char **argv) {
+}
+
+static ssize_t otrx_create_append_file(FILE *trx, const char *in_path) {
+ FILE *in;
+ size_t bytes;
+ ssize_t length = 0;
+ uint8_t buf[128];
+
+ in = fopen(in_path, "r");
+ if (!in) {
+ fprintf(stderr, "Couldn't open %s\n", in_path);
+ return -EACCES;
+ }
+
+ while ((bytes = fread(buf, 1, sizeof(buf), in)) > 0) {
+ if (fwrite(buf, 1, bytes, trx) != bytes) {
+ fprintf(stderr, "Couldn't write %zu B to %s\n", bytes, trx_path);
+ length = -EIO;
+ break;
+ }
+ length += bytes;
+ }
+
+ fclose(in);
+
+ return length;
+}
+
+static ssize_t otrx_create_append_zeros(FILE *trx, size_t length) {
+ uint8_t *buf;
+
+ buf = malloc(length);
+ if (!buf)
+ return -ENOMEM;
+ memset(buf, 0, length);
+
+ if (fwrite(buf, 1, length, trx) != length) {
+ fprintf(stderr, "Couldn't write %zu B to %s\n", length, trx_path);
+ return -EIO;
+ }
+
+ return length;
+}
+
+static ssize_t otrx_create_align(FILE *trx, size_t curr_offset, size_t alignment) {
+ if (curr_offset & (alignment - 1)) {
+ size_t length = alignment - (curr_offset % alignment);
+ return otrx_create_append_zeros(trx, length);
+ }
+
+ return 0;
+}
+
+static int otrx_create_write_hdr(FILE *trx, struct trx_header *hdr) {
+ size_t bytes, length;
+ uint8_t *buf;
+ uint32_t crc32;
+
+ hdr->magic = cpu_to_le32(TRX_MAGIC);
+ hdr->version = 1;
+
+ fseek(trx, 0, SEEK_SET);
+ bytes = fwrite(hdr, 1, sizeof(struct trx_header), trx);
+ if (bytes != sizeof(struct trx_header)) {
+ fprintf(stderr, "Couldn't write TRX header to %s\n", trx_path);
+ return -EIO;
+ }
+
+ length = le32_to_cpu(hdr->length);
+
+ buf = malloc(length);
+ if (!buf) {
+ fprintf(stderr, "Couldn't alloc %zu B buffer\n", length);
+ return -ENOMEM;
+ }
+
+ fseek(trx, 0, 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);
+ return -ENOMEM;
+ }
+
+ crc32 = otrx_crc32(buf + TRX_FLAGS_OFFSET, length - TRX_FLAGS_OFFSET);
+ hdr->crc32 = cpu_to_le32(crc32);
+
+ fseek(trx, 0, SEEK_SET);
+ bytes = fwrite(hdr, 1, sizeof(struct trx_header), trx);
+ if (bytes != sizeof(struct trx_header)) {
+ fprintf(stderr, "Couldn't write TRX header to %s\n", trx_path);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int otrx_create(int argc, char **argv) {
+ FILE *trx;
+ struct trx_header hdr = {};
+ ssize_t sbytes;
+ size_t curr_idx = 0;
+ size_t curr_offset = sizeof(hdr);
+ int c;
+ int err = 0;
+
+ if (argc < 3) {
+ fprintf(stderr, "No TRX file passed\n");
+ err = -EINVAL;
+ goto out;
+ }
+ trx_path = argv[2];
+
+ optind = 3;
+ otrx_create_parse_options(argc, argv);
+
+ trx = fopen(trx_path, "w+");
+ if (!trx) {
+ fprintf(stderr, "Couldn't open %s\n", trx_path);
+ err = -EACCES;
+ goto out;
+ }
+ fseek(trx, curr_offset, SEEK_SET);
+
+ optind = 3;
+ while ((c = getopt(argc, argv, "f:b:")) != -1) {
+ switch (c) {
+ case 'f':
+ if (curr_idx >= TRX_MAX_PARTS) {
+ err = -ENOSPC;
+ fprintf(stderr, "Reached TRX partitions limit, no place for %s\n", optarg);
+ goto err_close;
+ }
+
+ sbytes = otrx_create_append_file(trx, optarg);
+ if (sbytes < 0) {
+ fprintf(stderr, "Failed to append file %s\n", optarg);
+ } else {
+ hdr.offset[curr_idx++] = curr_offset;
+ curr_offset += sbytes;
+ }
+
+ sbytes = otrx_create_align(trx, curr_offset, 4);
+ if (sbytes < 0)
+ fprintf(stderr, "Failed to append zeros\n");
+ else
+ curr_offset += sbytes;
+
+ break;
+ case 'b':
+ sbytes = strtol(optarg, NULL, 0) - curr_offset;
+ if (sbytes < 0) {
+ fprintf(stderr, "Current TRX length is 0x%zx, can't pad it with zeros to 0x%lx\n", curr_offset, strtol(optarg, NULL, 0));
+ } else {
+ sbytes = otrx_create_append_zeros(trx, sbytes);
+ if (sbytes < 0)
+ fprintf(stderr, "Failed to append zeros\n");
+ else
+ curr_offset += sbytes;
+ }
+ break;
+ }
+ if (err)
+ break;
+ }
+
+ hdr.length = curr_offset;
+ otrx_create_write_hdr(trx, &hdr);
+err_close:
+ fclose(trx);
+out:
+ return err;
+}
+
+/**************************************************
* Extract
**************************************************/
@@ -363,6 +541,11 @@ static void usage() {
printf("\totrx check <file> [options]\tcheck if file is a valid TRX\n");
printf("\t-o offset\t\t\toffset of TRX data in file (default: 0)\n");
printf("\n");
+ printf("Creating new TRX file:\n");
+ printf("\totrx create <file> [options] [partitions]\n");
+ printf("\t-f file\t\t\t\t[partition] start new partition with content copied from file\n");
+ printf("\t-b offset\t\t\t[partition] append zeros to partition till reaching absolute offset\n");
+ printf("\n");
printf("Extracting from TRX file:\n");
printf("\totrx extract <file> [options]\textract partitions from TRX file\n");
printf("\t-o offset\t\t\toffset of TRX data in file (default: 0)\n");
@@ -375,6 +558,8 @@ int main(int argc, char **argv) {
if (argc > 1) {
if (!strcmp(argv[1], "check"))
return otrx_check(argc, argv);
+ else if (!strcmp(argv[1], "create"))
+ return otrx_create(argc, argv);
else if (!strcmp(argv[1], "extract"))
return otrx_extract(argc, argv);
}