diff options
Diffstat (limited to 'lib/tar/read_header.c')
| -rw-r--r-- | lib/tar/read_header.c | 197 |
1 files changed, 0 insertions, 197 deletions
diff --git a/lib/tar/read_header.c b/lib/tar/read_header.c index de6b0de..0591879 100644 --- a/lib/tar/read_header.c +++ b/lib/tar/read_header.c @@ -35,203 +35,6 @@ static int check_version(const tar_header_t *hdr) return ETV_UNKNOWN; } -static char *record_to_memory(FILE *fp, sqfs_u64 size) -{ - char *buffer = malloc(size + 1); - - if (buffer == NULL) - goto fail_errno; - - if (read_retry("reading tar record", fp, buffer, size)) - goto fail; - - if (skip_padding(fp, size)) - goto fail; - - buffer[size] = '\0'; - return buffer; -fail_errno: - perror("reading tar record"); - goto fail; -fail: - free(buffer); - return NULL; -} - -static tar_xattr_t *mkxattr(const char *key, size_t keylen, - const char *value, size_t valuelen) -{ - tar_xattr_t *xattr; - - xattr = calloc(1, sizeof(*xattr) + keylen + 1 + valuelen + 1); - if (xattr == NULL) - return NULL; - - xattr->key = xattr->data; - xattr->value = (sqfs_u8 *)xattr->data + keylen + 1; - xattr->value_len = valuelen; - memcpy(xattr->key, key, keylen); - memcpy(xattr->value, value, valuelen); - return xattr; -} - -static int read_pax_header(FILE *fp, sqfs_u64 entsize, unsigned int *set_by_pax, - tar_header_decoded_t *out) -{ - char *buffer, *line, *key, *ptr, *value, *end; - sparse_map_t *sparse_last = NULL, *sparse; - sqfs_u64 field, offset = 0, num_bytes = 0; - tar_xattr_t *xattr; - long len; - - buffer = record_to_memory(fp, entsize); - if (buffer == NULL) - return -1; - - end = buffer + entsize; - - for (line = buffer; line < end; line += len) { - len = strtol(line, &ptr, 10); - if (ptr == line || !isspace(*ptr) || len <= 0) - goto fail_malformed; - - if (len > (end - line)) - goto fail_ov; - - line[len - 1] = '\0'; - - while (ptr < end && isspace(*ptr)) - ++ptr; - - if (ptr >= end || (ptr - line) >= len) - goto fail_malformed; - - if (!strncmp(ptr, "uid=", 4)) { - if (pax_read_decimal(ptr + 4, &field)) - goto fail; - out->sb.st_uid = field; - *set_by_pax |= PAX_UID; - } else if (!strncmp(ptr, "gid=", 4)) { - if (pax_read_decimal(ptr + 4, &field)) - goto fail; - out->sb.st_gid = field; - *set_by_pax |= PAX_GID; - } else if (!strncmp(ptr, "path=", 5)) { - free(out->name); - out->name = strdup(ptr + 5); - if (out->name == NULL) - goto fail_errno; - *set_by_pax |= PAX_NAME; - } else if (!strncmp(ptr, "size=", 5)) { - if (pax_read_decimal(ptr + 5, &out->record_size)) - goto fail; - *set_by_pax |= PAX_SIZE; - } else if (!strncmp(ptr, "linkpath=", 9)) { - free(out->link_target); - out->link_target = strdup(ptr + 9); - if (out->link_target == NULL) - goto fail_errno; - *set_by_pax |= PAX_SLINK_TARGET; - } else if (!strncmp(ptr, "mtime=", 6)) { - if (ptr[6] == '-') { - if (pax_read_decimal(ptr + 7, &field)) - goto fail; - out->mtime = -((sqfs_s64)field); - } else { - if (pax_read_decimal(ptr + 6, &field)) - goto fail; - out->mtime = field; - } - *set_by_pax |= PAX_MTIME; - } else if (!strncmp(ptr, "GNU.sparse.name=", 16)) { - free(out->name); - out->name = strdup(ptr + 16); - if (out->name == NULL) - goto fail_errno; - *set_by_pax |= PAX_NAME; - } else if (!strncmp(ptr, "GNU.sparse.map=", 15)) { - free_sparse_list(out->sparse); - sparse_last = NULL; - - out->sparse = read_sparse_map(ptr + 15); - if (out->sparse == NULL) - goto fail; - } else if (!strncmp(ptr, "GNU.sparse.size=", 16)) { - if (pax_read_decimal(ptr + 16, &out->actual_size)) - goto fail; - *set_by_pax |= PAX_SPARSE_SIZE; - } else if (!strncmp(ptr, "GNU.sparse.offset=", 18)) { - if (pax_read_decimal(ptr + 18, &offset)) - goto fail; - } else if (!strncmp(ptr, "GNU.sparse.numbytes=", 20)) { - if (pax_read_decimal(ptr + 20, &num_bytes)) - goto fail; - sparse = calloc(1, sizeof(*sparse)); - if (sparse == NULL) - goto fail_errno; - sparse->offset = offset; - sparse->count = num_bytes; - if (sparse_last == NULL) { - free_sparse_list(out->sparse); - out->sparse = sparse_last = sparse; - } else { - sparse_last->next = sparse; - sparse_last = sparse; - } - } else if (!strncmp(ptr, "SCHILY.xattr.", 13)) { - key = ptr + 13; - - ptr = strrchr(key, '='); - if (ptr == NULL || ptr == key) - continue; - - value = ptr + 1; - - xattr = mkxattr(key, ptr - key, - value, len - (value - line) - 1); - if (xattr == NULL) - goto fail_errno; - - xattr->next = out->xattr; - out->xattr = xattr; - } else if (!strncmp(ptr, "LIBARCHIVE.xattr.", 17)) { - key = ptr + 17; - - ptr = strrchr(key, '='); - if (ptr == NULL || ptr == key) - continue; - - value = ptr + 1; - - xattr = mkxattr(key, ptr - key, value, strlen(value)); - if (xattr == NULL) - goto fail_errno; - - urldecode(xattr->key); - xattr->value_len = base64_decode(xattr->value, value, - xattr->value_len); - - xattr->next = out->xattr; - out->xattr = xattr; - } - } - - free(buffer); - return 0; -fail_malformed: - fputs("Found a malformed PAX header.\n", stderr); - goto fail; -fail_ov: - fputs("Numeric overflow in PAX header.\n", stderr); - goto fail; -fail_errno: - perror("reading pax header"); - goto fail; -fail: - free(buffer); - return -1; -} - static int decode_header(const tar_header_t *hdr, unsigned int set_by_pax, tar_header_decoded_t *out, int version) { |