+static void update_one(const char *path, const char *prefix, int prefix_length)
+{
+ const char *p = prefix_path(prefix, prefix_length, path);
+ if (!verify_path(p)) {
+ fprintf(stderr, "Ignoring path %s\n", path);
+ return;
+ }
+ if (mark_valid_only) {
+ if (mark_valid(p))
+ die("Unable to mark file %s", path);
+ return;
+ }
+
+ if (force_remove) {
+ if (remove_file_from_cache(p))
+ die("git-update-index: unable to remove %s", path);
+ report("remove '%s'", path);
+ return;
+ }
+ if (add_file_to_cache(p))
+ die("Unable to process file %s", path);
+ report("add '%s'", path);
+}
+
+static void read_index_info(int line_termination)
+{
+ struct strbuf buf;
+ strbuf_init(&buf);
+ while (1) {
+ char *ptr, *tab;
+ char *path_name;
+ unsigned char sha1[20];
+ unsigned int mode;
+ int stage;
+
+ /* This reads lines formatted in one of three formats:
+ *
+ * (1) mode SP sha1 TAB path
+ * The first format is what "git-apply --index-info"
+ * reports, and used to reconstruct a partial tree
+ * that is used for phony merge base tree when falling
+ * back on 3-way merge.
+ *
+ * (2) mode SP type SP sha1 TAB path
+ * The second format is to stuff git-ls-tree output
+ * into the index file.
+ *
+ * (3) mode SP sha1 SP stage TAB path
+ * This format is to put higher order stages into the
+ * index file and matches git-ls-files --stage output.
+ */
+ read_line(&buf, stdin, line_termination);
+ if (buf.eof)
+ break;
+
+ mode = strtoul(buf.buf, &ptr, 8);
+ if (ptr == buf.buf || *ptr != ' ')
+ goto bad_line;
+
+ tab = strchr(ptr, '\t');
+ if (!tab || tab - ptr < 41)
+ goto bad_line;
+
+ if (tab[-2] == ' ' && '0' <= tab[-1] && tab[-1] <= '3') {
+ stage = tab[-1] - '0';
+ ptr = tab + 1; /* point at the head of path */
+ tab = tab - 2; /* point at tail of sha1 */
+ }
+ else {
+ stage = 0;
+ ptr = tab + 1; /* point at the head of path */
+ }
+
+ if (get_sha1_hex(tab - 40, sha1) || tab[-41] != ' ')
+ goto bad_line;
+
+ if (line_termination && ptr[0] == '"')
+ path_name = unquote_c_style(ptr, NULL);
+ else
+ path_name = ptr;
+
+ if (!verify_path(path_name)) {
+ fprintf(stderr, "Ignoring path %s\n", path_name);
+ if (path_name != ptr)
+ free(path_name);
+ continue;
+ }
+
+ if (!mode) {
+ /* mode == 0 means there is no such path -- remove */
+ if (remove_file_from_cache(path_name))
+ die("git-update-index: unable to remove %s",
+ ptr);
+ }
+ else {
+ /* mode ' ' sha1 '\t' name
+ * ptr[-1] points at tab,
+ * ptr[-41] is at the beginning of sha1
+ */
+ ptr[-42] = ptr[-1] = 0;
+ if (add_cacheinfo(mode, sha1, path_name, stage))
+ die("git-update-index: unable to update %s",
+ path_name);
+ }
+ if (path_name != ptr)
+ free(path_name);
+ continue;
+
+ bad_line:
+ die("malformed index info %s", buf.buf);
+ }
+}
+
+static const char update_index_usage[] =
+"git-update-index [-q] [--add] [--replace] [--remove] [--unmerged] [--refresh] [--cacheinfo] [--chmod=(+|-)x] [--info-only] [--force-remove] [--stdin] [--index-info] [--ignore-missing] [-z] [--verbose] [--] <file>...";
+
+int main(int argc, const char **argv)