- unsigned int namelen;
- char *p, *header = NULL;
- unsigned int checksum = 0;
- int i;
-
- if (typeflag == TYPEFLAG_AUTO) {
- if (S_ISDIR(mode))
- typeflag = TYPEFLAG_DIR;
- else
- typeflag = TYPEFLAG_REG;
+ struct ustar_header header;
+ struct strbuf ext_header;
+
+ memset(&header, 0, sizeof(header));
+ ext_header.buf = NULL;
+ ext_header.len = ext_header.alloc = 0;
+
+ if (!sha1) {
+ *header.typeflag = TYPEFLAG_GLOBAL_HEADER;
+ mode = 0100666;
+ strcpy(header.name, "pax_global_header");
+ } else if (!path) {
+ *header.typeflag = TYPEFLAG_EXT_HEADER;
+ mode = 0100666;
+ sprintf(header.name, "%s.paxheader", sha1_to_hex(sha1));
+ } else {
+ if (S_ISDIR(mode)) {
+ *header.typeflag = TYPEFLAG_DIR;
+ mode |= 0777;
+ } else if (S_ISLNK(mode)) {
+ *header.typeflag = TYPEFLAG_LNK;
+ mode |= 0777;
+ } else if (S_ISREG(mode)) {
+ *header.typeflag = TYPEFLAG_REG;
+ mode |= (mode & 0100) ? 0777 : 0666;
+ } else {
+ error("unsupported file mode: 0%o (SHA1: %s)",
+ mode, sha1_to_hex(sha1));
+ return;
+ }
+ if (path->len > sizeof(header.name)) {
+ int plen = get_path_prefix(path, sizeof(header.prefix));
+ int rest = path->len - plen - 1;
+ if (plen > 0 && rest <= sizeof(header.name)) {
+ memcpy(header.prefix, path->buf, plen);
+ memcpy(header.name, path->buf + plen + 1, rest);
+ } else {
+ sprintf(header.name, "%s.data",
+ sha1_to_hex(sha1));
+ strbuf_append_ext_header(&ext_header, "path",
+ path->buf, path->len);
+ }
+ } else
+ memcpy(header.name, path->buf, path->len);