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authorRafał Miłecki <zajec5@gmail.com>2016-06-10 14:38:04 +0200
committerRafał Miłecki <zajec5@gmail.com>2016-06-13 22:53:07 +0200
commit399d214d05442fcf97702c531d610e4b806df37e (patch)
tree178ceae180a3980118b0d1e1121c7bb2282c3d48 /package/utils
parentcb0de9a68e926cf7e8cf4a6d74ee32bd0f1fed16 (diff)
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oseama: support extracting entity
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Diffstat (limited to 'package/utils')
-rw-r--r--package/utils/oseama/src/oseama.c134
1 files changed, 134 insertions, 0 deletions
diff --git a/package/utils/oseama/src/oseama.c b/package/utils/oseama/src/oseama.c
index 37a2171..4434b11 100644
--- a/package/utils/oseama/src/oseama.c
+++ b/package/utils/oseama/src/oseama.c
@@ -57,6 +57,7 @@ struct seama_entity_header {
char *seama_path;
int entity_idx = -1;
+char *out_path;
static inline size_t oseama_min(size_t x, size_t y) {
return x < y ? x : y;
@@ -392,6 +393,132 @@ out:
}
/**************************************************
+ * Extract
+ **************************************************/
+
+static void oseama_extract_parse_options(int argc, char **argv) {
+ int c;
+
+ while ((c = getopt(argc, argv, "e:o:")) != -1) {
+ switch (c) {
+ case 'e':
+ entity_idx = atoi(optarg);
+ break;
+ case 'o':
+ out_path = optarg;
+ break;
+ }
+ }
+}
+
+static int oseama_extract_entity(FILE *seama, FILE *out) {
+ struct seama_entity_header hdr;
+ size_t bytes, metasize, imagesize, length;
+ uint8_t buf[1024];
+ int i = 0;
+ int err = 0;
+
+ while ((bytes = fread(&hdr, 1, sizeof(hdr), seama)) == sizeof(hdr)) {
+ if (be32_to_cpu(hdr.magic) != SEAMA_MAGIC) {
+ fprintf(stderr, "Invalid Seama magic: 0x%08x\n", be32_to_cpu(hdr.magic));
+ err = -EINVAL;
+ break;
+ }
+ metasize = be16_to_cpu(hdr.metasize);
+ imagesize = be32_to_cpu(hdr.imagesize);
+
+ if (i != entity_idx) {
+ fseek(seama, metasize + imagesize, SEEK_CUR);
+ i++;
+ continue;
+ }
+
+ fseek(seama, -sizeof(hdr), SEEK_CUR);
+
+ length = sizeof(hdr) + metasize + imagesize;
+ while ((bytes = fread(buf, 1, oseama_min(sizeof(buf), length), seama)) > 0) {
+ if (fwrite(buf, 1, bytes, out) != bytes) {
+ fprintf(stderr, "Couldn't write %zu B to %s\n", bytes, out_path);
+ err = -EIO;
+ break;
+ }
+ length -= bytes;
+ }
+
+ if (length) {
+ fprintf(stderr, "Couldn't extract whole entity %d from %s (%zu B left)\n", entity_idx, seama_path, length);
+ err = -EIO;
+ break;
+ }
+
+ break;
+ }
+
+ return err;
+}
+
+static int oseama_extract(int argc, char **argv) {
+ FILE *seama;
+ FILE *out;
+ struct seama_seal_header hdr;
+ size_t bytes;
+ uint16_t metasize;
+ int err = 0;
+
+ if (argc < 3) {
+ fprintf(stderr, "No Seama file passed\n");
+ err = -EINVAL;
+ goto out;
+ }
+ seama_path = argv[2];
+
+ optind = 3;
+ oseama_extract_parse_options(argc, argv);
+ if (entity_idx < 0) {
+ fprintf(stderr, "No entity specified\n");
+ err = -EINVAL;
+ goto out;
+ } else if (!out_path) {
+ fprintf(stderr, "No output file specified\n");
+ err = -EINVAL;
+ goto out;
+ }
+
+ seama = fopen(seama_path, "r");
+ if (!seama) {
+ fprintf(stderr, "Couldn't open %s\n", seama_path);
+ err = -EACCES;
+ goto out;
+ }
+
+ out = fopen(out_path, "w");
+ if (!out) {
+ fprintf(stderr, "Couldn't open %s\n", out_path);
+ err = -EACCES;
+ goto err_close_seama;
+ }
+
+ bytes = fread(&hdr, 1, sizeof(hdr), seama);
+ if (bytes != sizeof(hdr)) {
+ fprintf(stderr, "Couldn't read %s header\n", seama_path);
+ err = -EIO;
+ goto err_close_out;
+ }
+ metasize = be16_to_cpu(hdr.metasize);
+
+ fseek(seama, metasize, SEEK_CUR);
+
+ oseama_extract_entity(seama, out);
+
+err_close_out:
+ fclose(out);
+err_close_seama:
+ fclose(seama);
+out:
+ return err;
+}
+
+/**************************************************
* Start
**************************************************/
@@ -407,6 +534,11 @@ static void usage() {
printf("\t-m meta\t\t\t\tmeta into to put in header\n");
printf("\t-f file\t\t\t\tappend content from file\n");
printf("\t-b offset\t\t\tappend zeros till reaching absolute offset\n");
+ printf("\n");
+ printf("Extract from Seama seal (container):\n");
+ printf("\toseama extract <file> [options]\n");
+ printf("\t-e\t\t\t\tindex of entity to extract\n");
+ printf("\t-o file\t\t\t\toutput file\n");
}
int main(int argc, char **argv) {
@@ -415,6 +547,8 @@ int main(int argc, char **argv) {
return oseama_info(argc, argv);
else if (!strcmp(argv[1], "entity"))
return oseama_entity(argc, argv);
+ else if (!strcmp(argv[1], "extract"))
+ return oseama_extract(argc, argv);
}
usage();