diff options
Diffstat (limited to 'package/utils/oseama/src')
| -rw-r--r-- | package/utils/oseama/src/oseama.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/package/utils/oseama/src/oseama.c b/package/utils/oseama/src/oseama.c index 37a2171574..4434b11162 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(); |