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Date:: Fri Sep 2 13:53:39 2022 UTC
Message:: gotwebd: plugs leaks in got_get_repo_commits call got_get_repo_commit only once and avoid leaking the field of repo_commit at each loop iteration. ok stsp@
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1 /*
2  * Copyright (c) 2020-2022 Tracey Emery <tracey@traceyemery.net>
3  * Copyright (c) 2018, 2019 Stefan Sperling <stsp@openbsd.org>
4  *
5  * Permission to use, copy, modify, and distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16  */
17 
18 #include <sys/queue.h>
19 #include <sys/socket.h>
20 #include <sys/stat.h>
21 
22 #include <event.h>
23 #include <imsg.h>
24 #include <sha1.h>
25 #include <stdlib.h>
26 #include <stdio.h>
27 #include <string.h>
28 #include <unistd.h>
29 
30 #include "got_error.h"
31 #include "got_object.h"
32 #include "got_reference.h"
33 #include "got_repository.h"
34 #include "got_path.h"
35 #include "got_cancel.h"
36 #include "got_diff.h"
37 #include "got_commit_graph.h"
38 #include "got_blame.h"
39 #include "got_privsep.h"
40 
41 #include "proc.h"
42 #include "gotwebd.h"
43 
44 static const struct got_error *got_init_repo_commit(struct repo_commit **);
45 static const struct got_error *got_init_repo_tag(struct repo_tag **);
46 static const struct got_error *got_get_repo_commit(struct request *,
47     struct repo_commit *, struct got_commit_object *, struct got_reflist_head *,
48     struct got_object_id *);
49 static const struct got_error *got_gotweb_dupfd(int *, int *);
50 static const struct got_error *got_gotweb_openfile(FILE **, int *, int *);
51 static const struct got_error *got_gotweb_flushfile(FILE *, int);
52 static const struct got_error *got_gotweb_blame_cb(void *, int, int,
53     struct got_commit_object *,struct got_object_id *);
54 
55 static int
56 isbinary(const uint8_t *buf, size_t n)
57 {
58 	return memchr(buf, '\0', n) != NULL;
59 }
60 
61 
62 static const struct got_error *
63 got_gotweb_flushfile(FILE *f, int fd)
64 {
65 	if (fseek(f, 0, SEEK_SET) == -1)
66 		return got_error_from_errno("fseek");
67 
68 	if (ftruncate(fd, 0) == -1)
69 		return got_error_from_errno("ftruncate");
70 
71 	if (fsync(fd) == -1)
72 		return got_error_from_errno("fsync");
73 
74 	if (f && fclose(f) == EOF)
75 		return got_error_from_errno("fclose");
76 
77 	if (fd != -1 && close(fd) != -1)
78 		return got_error_from_errno("close");
79 
80 	return NULL;
81 }
82 
83 static const struct got_error *
84 got_gotweb_openfile(FILE **f, int *priv_fd, int *fd)
85 {
86 	*fd = dup(*priv_fd);
87 	if (*fd == -1)
88 		return got_error_from_errno("dup");
89 
90 	*f = fdopen(*fd, "w+");
91 	if (*f == NULL) {
92 		close(*fd);
93 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
94 	}
95 
96 	return NULL;
97 }
98 
99 static const struct got_error *
100 got_gotweb_dupfd(int *priv_fd, int *fd)
101 {
102 	*fd = dup(*priv_fd);
103 
104 	if (*fd < 0)
105 		return NULL;
106 
107 	return NULL;
108 }
109 
110 const struct got_error *
111 got_get_repo_owner(char **owner, struct request *c, char *dir)
112 {
113 	struct server *srv = c->srv;
114 	struct transport *t = c->t;
115 	struct got_repository *repo = t->repo;
116 	const char *gitconfig_owner;
117 
118 	*owner = NULL;
119 
120 	if (srv->show_repo_owner == 0)
121 		return NULL;
122 
123 	gitconfig_owner = got_repo_get_gitconfig_owner(repo);
124 	if (gitconfig_owner) {
125 		*owner = strdup(gitconfig_owner);
126 		if (*owner == NULL)
127 			return got_error_from_errno("strdup");
128 	} else {
129 		*owner = strdup("");
130 		if (*owner == NULL)
131 			return got_error_from_errno("strdup");
132 	}
133 	return NULL;
134 }
135 
136 const struct got_error *
137 got_get_repo_age(char **repo_age, struct request *c, char *dir,
138     const char *refname, int ref_tm)
139 {
140 	const struct got_error *error = NULL;
141 	struct server *srv = c->srv;
142 	struct transport *t = c->t;
143 	struct got_repository *repo = t->repo;
144 	struct got_commit_object *commit = NULL;
145 	struct got_reflist_head refs;
146 	struct got_reflist_entry *re;
147 	time_t committer_time = 0, cmp_time = 0;
148 
149 	*repo_age = NULL;
150 	TAILQ_INIT(&refs);
151 
152 	if (srv->show_repo_age == 0)
153 		return NULL;
154 
155 	error = got_ref_list(&refs, repo, "refs/heads",
156 	    got_ref_cmp_by_name, NULL);
157 	if (error)
158 		goto done;
159 
160 	/*
161 	 * Find the youngest branch tip in the repository, or the age of
162 	 * the a specific branch tip if a name was provided by the caller.
163 	 */
164 	TAILQ_FOREACH(re, &refs, entry) {
165 		struct got_object_id *id = NULL;
166 
167 		if (refname && strcmp(got_ref_get_name(re->ref), refname) != 0)
168 			continue;
169 
170 		error = got_ref_resolve(&id, repo, re->ref);
171 		if (error)
172 			goto done;
173 
174 		error = got_object_open_as_commit(&commit, repo, id);
175 		free(id);
176 		if (error)
177 			goto done;
178 
179 		committer_time =
180 		    got_object_commit_get_committer_time(commit);
181 		got_object_commit_close(commit);
182 		if (cmp_time < committer_time)
183 			cmp_time = committer_time;
184 
185 		if (refname)
186 			break;
187 	}
188 
189 	if (cmp_time != 0) {
190 		committer_time = cmp_time;
191 		error = gotweb_get_time_str(repo_age, committer_time, ref_tm);
192 	}
193 done:
194 	got_ref_list_free(&refs);
195 	return error;
196 }
197 
198 static const struct got_error *
199 got_get_repo_commit(struct request *c, struct repo_commit *repo_commit,
200     struct got_commit_object *commit, struct got_reflist_head *refs,
201     struct got_object_id *id)
202 {
203 	const struct got_error *error = NULL;
204 	struct got_reflist_entry *re;
205 	struct got_object_id *id2 = NULL;
206 	struct got_object_qid *parent_id;
207 	struct transport *t = c->t;
208 	struct querystring *qs = c->t->qs;
209 	char *commit_msg = NULL, *commit_msg0;
210 
211 	TAILQ_FOREACH(re, refs, entry) {
212 		char *s;
213 		const char *name;
214 		struct got_tag_object *tag = NULL;
215 		struct got_object_id *ref_id;
216 		int cmp;
217 
218 		if (got_ref_is_symbolic(re->ref))
219 			continue;
220 
221 		name = got_ref_get_name(re->ref);
222 		if (strncmp(name, "refs/", 5) == 0)
223 			name += 5;
224 		if (strncmp(name, "got/", 4) == 0)
225 			continue;
226 		if (strncmp(name, "heads/", 6) == 0)
227 			name += 6;
228 		if (strncmp(name, "remotes/", 8) == 0) {
229 			name += 8;
230 			if (strstr(name, "/" GOT_REF_HEAD) != NULL)
231 				continue;
232 		}
233 		error = got_ref_resolve(&ref_id, t->repo, re->ref);
234 		if (error)
235 			return error;
236 		if (strncmp(name, "tags/", 5) == 0) {
237 			error = got_object_open_as_tag(&tag, t->repo, ref_id);
238 			if (error) {
239 				if (error->code != GOT_ERR_OBJ_TYPE) {
240 					free(ref_id);
241 					continue;
242 				}
243 				/*
244 				 * Ref points at something other
245 				 * than a tag.
246 				 */
247 				error = NULL;
248 				tag = NULL;
249 			}
250 		}
251 		cmp = got_object_id_cmp(tag ?
252 		    got_object_tag_get_object_id(tag) : ref_id, id);
253 		free(ref_id);
254 		if (tag)
255 			got_object_tag_close(tag);
256 		if (cmp != 0)
257 			continue;
258 		s = repo_commit->refs_str;
259 		if (asprintf(&repo_commit->refs_str, "%s%s%s", s ? s : "",
260 		    s ? ", " : "", name) == -1) {
261 			error = got_error_from_errno("asprintf");
262 			free(s);
263 			repo_commit->refs_str = NULL;
264 			return error;
265 		}
266 		free(s);
267 	}
268 
269 	error = got_object_id_str(&repo_commit->commit_id, id);
270 	if (error)
271 		return error;
272 
273 	error = got_object_id_str(&repo_commit->tree_id,
274 	    got_object_commit_get_tree_id(commit));
275 	if (error)
276 		return error;
277 
278 	if (qs->action == DIFF) {
279 		parent_id = STAILQ_FIRST(
280 		    got_object_commit_get_parent_ids(commit));
281 		if (parent_id != NULL) {
282 			id2 = got_object_id_dup(&parent_id->id);
283 			error = got_object_id_str(&repo_commit->parent_id, id2);
284 			if (error)
285 				return error;
286 			free(id2);
287 		} else {
288 			repo_commit->parent_id = strdup("/dev/null");
289 			if (repo_commit->parent_id == NULL) {
290 				error = got_error_from_errno("strdup");
291 				return error;
292 			}
293 		}
294 	}
295 
296 	repo_commit->committer_time =
297 	    got_object_commit_get_committer_time(commit);
298 
299 	repo_commit->author =
300 	    strdup(got_object_commit_get_author(commit));
301 	if (repo_commit->author == NULL) {
302 		error = got_error_from_errno("strdup");
303 		return error;
304 	}
305 	repo_commit->committer =
306 	    strdup(got_object_commit_get_committer(commit));
307 	if (repo_commit->committer == NULL) {
308 		error = got_error_from_errno("strdup");
309 		return error;
310 	}
311 	error = got_object_commit_get_logmsg(&commit_msg0, commit);
312 	if (error)
313 		return error;
314 
315 	commit_msg = commit_msg0;
316 	while (*commit_msg == '\n')
317 		commit_msg++;
318 
319 	repo_commit->commit_msg = strdup(commit_msg);
320 	if (repo_commit->commit_msg == NULL)
321 		error = got_error_from_errno("strdup");
322 	free(commit_msg0);
323 	return error;
324 }
325 
326 const struct got_error *
327 got_get_repo_commits(struct request *c, int limit)
328 {
329 	const struct got_error *error = NULL;
330 	struct got_object_id *id = NULL;
331 	struct got_commit_graph *graph = NULL;
332 	struct got_commit_object *commit = NULL;
333 	struct got_reflist_head refs;
334 	struct got_reference *ref = NULL;
335 	struct repo_commit *repo_commit = NULL;
336 	struct server *srv = c->srv;
337 	struct transport *t = c->t;
338 	struct got_repository *repo = t->repo;
339 	struct querystring *qs = t->qs;
340 	struct repo_dir *repo_dir = t->repo_dir;
341 	char *in_repo_path = NULL, *repo_path = NULL, *file_path = NULL;
342 	int chk_next = 0, chk_multi = 0, commit_found = 0;
343 	int obj_type, limit_chk = 0;
344 
345 	TAILQ_INIT(&refs);
346 
347 	if (qs->file != NULL && strlen(qs->file) > 0)
348 		if (asprintf(&file_path, "%s/%s", qs->folder ? qs->folder : "",
349 		    qs->file) == -1)
350 			return got_error_from_errno("asprintf");
351 
352 	if (asprintf(&repo_path, "%s/%s", srv->repos_path,
353 	    repo_dir->name) == -1) {
354 		error = got_error_from_errno("asprintf");
355 		goto done;
356 	}
357 
358 	/*
359 	 * XXX: jumping directly to a commit id via
360 	 * got_repo_match_object_id_prefix significantly improves performance,
361 	 * but does not allow us to create a PREVIOUS button, since commits can
362 	 * only be itereated forward. So, we have to match as we iterate from
363 	 * the headref.
364 	 */
365 	if (qs->action == BRIEFS || qs->action == COMMITS ||
366 	    (qs->action == TREE && qs->commit == NULL)) {
367 		error = got_ref_open(&ref, repo, qs->headref, 0);
368 		if (error)
369 			goto done;
370 
371 		error = got_ref_resolve(&id, repo, ref);
372 		if (error)
373 			goto done;
374 	} else if (qs->commit != NULL) {
375 		error = got_ref_open(&ref, repo, qs->commit, 0);
376 		if (error == NULL) {
377 			error = got_ref_resolve(&id, repo, ref);
378 			if (error)
379 				goto done;
380 			error = got_object_get_type(&obj_type, repo, id);
381 			if (error)
382 				goto done;
383 			if (obj_type == GOT_OBJ_TYPE_TAG) {
384 				struct got_tag_object *tag;
385 				error = got_object_open_as_tag(&tag, repo, id);
386 				if (error)
387 					goto done;
388 				if (got_object_tag_get_object_type(tag) !=
389 				    GOT_OBJ_TYPE_COMMIT) {
390 					got_object_tag_close(tag);
391 					error = got_error(GOT_ERR_OBJ_TYPE);
392 					goto done;
393 				}
394 				free(id);
395 				id = got_object_id_dup(
396 				    got_object_tag_get_object_id(tag));
397 				if (id == NULL)
398 					error = got_error_from_errno(
399 					    "got_object_id_dup");
400 				got_object_tag_close(tag);
401 				if (error)
402 					goto done;
403 			} else if (obj_type != GOT_OBJ_TYPE_COMMIT) {
404 				error = got_error(GOT_ERR_OBJ_TYPE);
405 				goto done;
406 			}
407 		}
408 		error = got_repo_match_object_id_prefix(&id, qs->commit,
409 		    GOT_OBJ_TYPE_COMMIT, repo);
410 		if (error)
411 			goto done;
412 	}
413 
414 	error = got_repo_map_path(&in_repo_path, repo, repo_path);
415 	if (error)
416 		goto done;
417 
418 	error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name, NULL);
419 	if (error)
420 		goto done;
421 
422 	if (qs->file != NULL && strlen(qs->file) > 0) {
423 		error = got_commit_graph_open(&graph, file_path, 0);
424 		if (error)
425 			goto done;
426 	} else {
427 		error = got_commit_graph_open(&graph, in_repo_path, 0);
428 		if (error)
429 			goto done;
430 	}
431 
432 	error = got_commit_graph_iter_start(graph, id, repo, NULL, NULL);
433 	if (error)
434 		goto done;
435 
436 	for (;;) {
437 		if (limit_chk == ((limit * qs->page) - (limit - 1)) &&
438 		    commit_found == 0 && repo_commit &&
439 		    repo_commit->commit_id != NULL) {
440 			t->prev_id = strdup(repo_commit->commit_id);
441 			if (t->prev_id == NULL) {
442 				error = got_error_from_errno("strdup");
443 				goto done;
444 			}
445 		}
446 
447 		error = got_commit_graph_iter_next(&id, graph, repo, NULL,
448 		    NULL);
449 		if (error) {
450 			if (error->code == GOT_ERR_ITER_COMPLETED)
451 				error = NULL;
452 			goto done;
453 		}
454 		if (id == NULL)
455 			goto done;
456 
457 		error = got_object_open_as_commit(&commit, repo, id);
458 		if (error)
459 			goto done;
460 
461 		error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name,
462 		    NULL);
463 		if (error)
464 			goto done;
465 
466 		error = got_init_repo_commit(&repo_commit);
467 		if (error)
468 			goto done;
469 
470 		TAILQ_INSERT_TAIL(&t->repo_commits, repo_commit, entry);
471 
472 		error = got_get_repo_commit(c, repo_commit, commit,
473 		    &refs, id);
474 		if (error)
475 			goto done;
476 
477 		if (qs->commit != NULL && commit_found == 0 && limit != 1) {
478 			if (strcmp(qs->commit, repo_commit->commit_id) == 0)
479 				commit_found = 1;
480 			else if (qs->file != NULL && strlen(qs->file) > 0 &&
481 			    qs->page == 0)
482 				commit_found = 1;
483 			else {
484 				limit_chk++;
485 				free(id);
486 				id = NULL;
487 				continue;
488 			}
489 		}
490 
491 		free(id);
492 		id = NULL;
493 
494 		if (limit == 1 && chk_multi == 0 &&
495 		    srv->max_commits_display != 1)
496 			commit_found = 1;
497 		else {
498 			chk_multi = 1;
499 
500 			/*
501 			 * check for one more commit before breaking,
502 			 * so we know whether to navigate through briefs
503 			 * commits and summary
504 			 */
505 			if (chk_next && (qs->action == BRIEFS ||
506 			    qs->action == COMMITS || qs->action == SUMMARY)) {
507 				t->next_id = strdup(repo_commit->commit_id);
508 				if (t->next_id == NULL) {
509 					error = got_error_from_errno("strdup");
510 					goto done;
511 				}
512 				if (commit) {
513 					got_object_commit_close(commit);
514 					commit = NULL;
515 				}
516 				TAILQ_REMOVE(&t->repo_commits, repo_commit,
517 				    entry);
518 				gotweb_free_repo_commit(repo_commit);
519 				goto done;
520 			}
521 		}
522 		got_ref_list_free(&refs);
523 		if (error || (limit && --limit == 0)) {
524 			if (commit_found || (qs->file != NULL &&
525 			    strlen(qs->file) > 0))
526 				if (chk_multi == 0)
527 					break;
528 			chk_next = 1;
529 		}
530 		if (commit) {
531 			got_object_commit_close(commit);
532 			commit = NULL;
533 		}
534 	}
535 done:
536 	if (ref)
537 		got_ref_close(ref);
538 	if (commit)
539 		got_object_commit_close(commit);
540 	if (graph)
541 		got_commit_graph_close(graph);
542 	got_ref_list_free(&refs);
543 	free(in_repo_path);
544 	free(file_path);
545 	free(repo_path);
546 	free(id);
547 	return error;
548 }
549 
550 const struct got_error *
551 got_get_repo_tags(struct request *c, int limit)
552 {
553 	const struct got_error *error = NULL;
554 	struct got_object_id *id = NULL;
555 	struct got_commit_object *commit = NULL;
556 	struct got_reflist_head refs;
557 	struct got_reference *ref;
558 	struct got_reflist_entry *re;
559 	struct server *srv = c->srv;
560 	struct transport *t = c->t;
561 	struct got_repository *repo = t->repo;
562 	struct querystring *qs = t->qs;
563 	struct repo_dir *repo_dir = t->repo_dir;
564 	struct got_tag_object *tag = NULL;
565 	struct repo_tag *rt = NULL, *trt = NULL;
566 	char *in_repo_path = NULL, *repo_path = NULL, *id_str = NULL;
567 	char *tag_commit = NULL, *tag_commit0 = NULL;
568 	char *commit_msg = NULL, *commit_msg0 = NULL;
569 	int chk_next = 0, chk_multi = 1, commit_found = 0, c_cnt = 0;
570 
571 	TAILQ_INIT(&refs);
572 
573 	if (asprintf(&repo_path, "%s/%s", srv->repos_path,
574 	    repo_dir->name) == -1)
575 		return got_error_from_errno("asprintf");
576 
577 	if (qs->commit == NULL && qs->action == TAGS) {
578 		error = got_ref_open(&ref, repo, qs->headref, 0);
579 		if (error)
580 			goto err;
581 		error = got_ref_resolve(&id, repo, ref);
582 		got_ref_close(ref);
583 		if (error)
584 			goto err;
585 	} else if (qs->commit == NULL && qs->action == TAG) {
586 		error = got_error_msg(GOT_ERR_EOF, "commit id missing");
587 		goto err;
588 	} else {
589 		error = got_repo_match_object_id_prefix(&id, qs->commit,
590 		    GOT_OBJ_TYPE_COMMIT, repo);
591 		if (error)
592 			goto err;
593 	}
594 
595 	if (qs->action != SUMMARY && qs->action != TAGS) {
596 		error = got_object_open_as_commit(&commit, repo, id);
597 		if (error)
598 			goto err;
599 		error = got_object_commit_get_logmsg(&commit_msg0, commit);
600 		if (error)
601 			goto err;
602 		if (commit) {
603 			got_object_commit_close(commit);
604 			commit = NULL;
605 		}
606 	}
607 
608 	error = got_repo_map_path(&in_repo_path, repo, repo_path);
609 	if (error)
610 		goto err;
611 
612 	error = got_ref_list(&refs, repo, "refs/tags", got_ref_cmp_tags,
613 	   repo);
614 	if (error)
615 		goto err;
616 
617 	if (limit == 1)
618 		chk_multi = 0;
619 
620 	/*
621 	 * XXX: again, see previous message about caching
622 	 */
623 
624 	TAILQ_FOREACH(re, &refs, entry) {
625 		struct repo_tag *new_repo_tag = NULL;
626 		error = got_init_repo_tag(&new_repo_tag);
627 		if (error)
628 			goto err;
629 
630 		TAILQ_INSERT_TAIL(&t->repo_tags, new_repo_tag, entry);
631 
632 		new_repo_tag->tag_name = strdup(got_ref_get_name(re->ref));
633 		if (new_repo_tag->tag_name == NULL) {
634 			error = got_error_from_errno("strdup");
635 			goto err;
636 		}
637 
638 		free(id);
639 		id = NULL;
640 
641 		free(id_str);
642 		id_str = NULL;
643 
644 		error = got_ref_resolve(&id, repo, re->ref);
645 		if (error)
646 			goto done;
647 
648 		if (tag)
649 			got_object_tag_close(tag);
650 		error = got_object_open_as_tag(&tag, repo, id);
651 		if (error) {
652 			if (error->code != GOT_ERR_OBJ_TYPE)
653 				goto done;
654 			/* "lightweight" tag */
655 			error = got_object_open_as_commit(&commit, repo, id);
656 			if (error)
657 				goto done;
658 			new_repo_tag->tagger =
659 			    strdup(got_object_commit_get_committer(commit));
660 			if (new_repo_tag->tagger == NULL) {
661 				error = got_error_from_errno("strdup");
662 				goto err;
663 			}
664 			new_repo_tag->tagger_time =
665 			    got_object_commit_get_committer_time(commit);
666 			error = got_object_id_str(&id_str, id);
667 			if (error)
668 				goto err;
669 		} else {
670 			new_repo_tag->tagger =
671 			    strdup(got_object_tag_get_tagger(tag));
672 			if (new_repo_tag->tagger == NULL) {
673 				error = got_error_from_errno("strdup");
674 				goto err;
675 			}
676 			new_repo_tag->tagger_time =
677 			    got_object_tag_get_tagger_time(tag);
678 			error = got_object_id_str(&id_str,
679 			    got_object_tag_get_object_id(tag));
680 			if (error)
681 				goto err;
682 		}
683 
684 		new_repo_tag->commit_id = strdup(id_str);
685 		if (new_repo_tag->commit_id == NULL)
686 			goto err;
687 
688 		if (commit_found == 0 && qs->commit != NULL &&
689 		    strncmp(id_str, qs->commit, strlen(id_str)) != 0)
690 			continue;
691 		else
692 			commit_found = 1;
693 
694 		t->tag_count++;
695 
696 		/*
697 		 * check for one more commit before breaking,
698 		 * so we know whether to navigate through briefs
699 		 * commits and summary
700 		 */
701 		if (chk_next) {
702 			t->next_id = strdup(new_repo_tag->commit_id);
703 			if (t->next_id == NULL) {
704 				error = got_error_from_errno("strdup");
705 				goto err;
706 			}
707 			if (commit) {
708 				got_object_commit_close(commit);
709 				commit = NULL;
710 			}
711 			TAILQ_REMOVE(&t->repo_tags, new_repo_tag, entry);
712 			gotweb_free_repo_tag(new_repo_tag);
713 			goto done;
714 		}
715 
716 		if (commit) {
717 			error = got_object_commit_get_logmsg(&tag_commit0,
718 			    commit);
719 			if (error)
720 				goto err;
721 			got_object_commit_close(commit);
722 			commit = NULL;
723 		} else {
724 			tag_commit0 = strdup(got_object_tag_get_message(tag));
725 			if (tag_commit0 == NULL) {
726 				error = got_error_from_errno("strdup");
727 				goto err;
728 			}
729 		}
730 
731 		tag_commit = tag_commit0;
732 		while (*tag_commit == '\n')
733 			tag_commit++;
734 		new_repo_tag->tag_commit = strdup(tag_commit);
735 		if (new_repo_tag->tag_commit == NULL) {
736 			error = got_error_from_errno("strdup");
737 			free(tag_commit0);
738 			goto err;
739 		}
740 		free(tag_commit0);
741 
742 		if (qs->action != SUMMARY && qs->action != TAGS) {
743 			commit_msg = commit_msg0;
744 			while (*commit_msg == '\n')
745 				commit_msg++;
746 
747 			new_repo_tag->commit_msg = strdup(commit_msg);
748 			if (new_repo_tag->commit_msg == NULL) {
749 				error = got_error_from_errno("strdup");
750 				goto err;
751 			}
752 		}
753 
754 		if (limit && --limit == 0) {
755 			if (chk_multi == 0)
756 				break;
757 			chk_next = 1;
758 		}
759 	}
760 
761 done:
762 	/*
763 	 * we have tailq populated, so find previous commit id
764 	 * for navigation through briefs and commits
765 	 */
766 	if (t->tag_count == 0) {
767 		TAILQ_FOREACH_SAFE(rt, &t->repo_tags, entry, trt) {
768 			TAILQ_REMOVE(&t->repo_tags, rt, entry);
769 			gotweb_free_repo_tag(rt);
770 		}
771 	}
772 	if (t->tag_count > 0 && t->prev_id == NULL && qs->commit != NULL) {
773 		commit_found = 0;
774 		TAILQ_FOREACH_REVERSE(rt, &t->repo_tags, repo_tags_head,
775 		    entry) {
776 			if (commit_found == 0 && rt->commit_id != NULL &&
777 			    strcmp(qs->commit, rt->commit_id) != 0) {
778 				continue;
779 			} else
780 				commit_found = 1;
781 			if (c_cnt == srv->max_commits_display ||
782 			    rt == TAILQ_FIRST(&t->repo_tags)) {
783 				t->prev_id = strdup(rt->commit_id);
784 				if (t->prev_id == NULL)
785 					error = got_error_from_errno("strdup");
786 				break;
787 			}
788 			c_cnt++;
789 		}
790 	}
791 err:
792 	if (commit)
793 		got_object_commit_close(commit);
794 	if (tag)
795 		got_object_tag_close(tag);
796 	got_ref_list_free(&refs);
797 	free(commit_msg0);
798 	free(in_repo_path);
799 	free(repo_path);
800 	free(id);
801 	free(id_str);
802 	return error;
803 }
804 
805 const struct got_error *
806 got_output_repo_tree(struct request *c)
807 {
808 	const struct got_error *error = NULL;
809 	struct transport *t = c->t;
810 	struct got_commit_object *commit = NULL;
811 	struct got_repository *repo = t->repo;
812 	struct querystring *qs = t->qs;
813 	struct repo_commit *rc = NULL;
814 	struct got_object_id *tree_id = NULL, *commit_id = NULL;
815 	struct got_reflist_head refs;
816 	struct got_tree_object *tree = NULL;
817 	struct repo_dir *repo_dir = t->repo_dir;
818 	const char *name, *index_page_str, *folder;
819 	char *id_str = NULL, *escaped_name = NULL;
820 	char *path = NULL, *in_repo_path = NULL, *modestr = NULL;
821 	int nentries, i, r;
822 
823 	TAILQ_INIT(&refs);
824 
825 	rc = TAILQ_FIRST(&t->repo_commits);
826 
827 	if (qs->folder != NULL) {
828 		path = strdup(qs->folder);
829 		if (path == NULL) {
830 			error = got_error_from_errno("strdup");
831 			goto done;
832 		}
833 	} else {
834 		error = got_repo_map_path(&in_repo_path, repo, repo_dir->path);
835 		if (error)
836 			goto done;
837 		free(path);
838 		path = in_repo_path;
839 	}
840 
841 	error = got_repo_match_object_id(&commit_id, NULL, rc->commit_id,
842 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
843 	if (error)
844 		goto done;
845 
846 	error = got_object_open_as_commit(&commit, repo, commit_id);
847 	if (error)
848 		goto done;
849 
850 	error = got_object_id_by_path(&tree_id, repo, commit, path);
851 	if (error)
852 		goto done;
853 
854 	error = got_object_open_as_tree(&tree, repo, tree_id);
855 	if (error)
856 		goto done;
857 
858 	nentries = got_object_tree_get_nentries(tree);
859 
860 	index_page_str = qs->index_page_str ? qs->index_page_str : "";
861 	folder = qs->folder ? qs->folder : "";
862 
863 	for (i = 0; i < nentries; i++) {
864 		struct got_tree_entry *te;
865 		mode_t mode;
866 
867 		te = got_object_tree_get_entry(tree, i);
868 
869 		error = got_object_id_str(&id_str, got_tree_entry_get_id(te));
870 		if (error)
871 			goto done;
872 
873 		modestr = strdup("");
874 		if (modestr == NULL) {
875 			error = got_error_from_errno("strdup");
876 			goto done;
877 		}
878 		mode = got_tree_entry_get_mode(te);
879 		if (got_object_tree_entry_is_submodule(te)) {
880 			free(modestr);
881 			modestr = strdup("$");
882 			if (modestr == NULL) {
883 				error = got_error_from_errno("strdup");
884 				goto done;
885 			}
886 		} else if (S_ISLNK(mode)) {
887 			free(modestr);
888 			modestr = strdup("@");
889 			if (modestr == NULL) {
890 				error = got_error_from_errno("strdup");
891 				goto done;
892 			}
893 		} else if (S_ISDIR(mode)) {
894 			free(modestr);
895 			modestr = strdup("/");
896 			if (modestr == NULL) {
897 				error = got_error_from_errno("strdup");
898 				goto done;
899 			}
900 		} else if (mode & S_IXUSR) {
901 			free(modestr);
902 			modestr = strdup("*");
903 			if (modestr == NULL) {
904 				error = got_error_from_errno("strdup");
905 				goto done;
906 			}
907 		}
908 
909 		name = got_tree_entry_get_name(te);
910 		error = gotweb_escape_html(&escaped_name, name);
911 		if (error)
912 			goto done;
913 
914 		if (S_ISDIR(mode)) {
915 			r = fcgi_printf(c,
916 			    "<div class='tree_wrapper'>\n"
917 			    "<div class='tree_line'>"
918 			    "<a class='diff_directory' "
919 			    "href='?index_page=%s&path=%s&action=tree"
920 			    "&commit=%s&folder=%s/%s'>%s%s</a>"
921 			    "</div>\n" /* .tree_line */
922 			    "<div class='tree_line_blank'>&nbsp;</div>\n"
923 			    "</div>\n", /* .tree_wrapper */
924 			    index_page_str, qs->path, rc->commit_id,
925 			    folder, name, escaped_name, modestr);
926 			if (r == -1)
927 				goto done;
928 		} else {
929 			r = fcgi_printf(c,
930 			    "<div class='tree_wrapper'>\n"
931 			    "<div class='tree_line'>"
932 			    "<a href='?index_page=%s&path=%s&action=blob"
933 			    "&commit=%s&folder=%s&file=%s'>%s%s</a>"
934 			    "</div>\n" /* .tree_line */
935 			    "<div class='tree_line_blank'>"
936 			    "<a href='?index_page=%s&path=%s&action=commits"
937 			    "&commit=%s&folder=%s&file=%s'>commits</a>\n"
938 			    " | \n"
939 			    "<a href='?index_page=%s&path=%s&action=blame"
940 			    "&commit=%s&folder=%s&file=%s'>blame</a>\n"
941 			    "</div>\n"  /* .tree_line_blank */
942 			    "</div>\n", /* .tree_wrapper */
943 			    index_page_str, qs->path, rc->commit_id,
944 			    folder, name, escaped_name, modestr,
945 			    index_page_str, qs->path, rc->commit_id,
946 			    folder, name,
947 			    index_page_str, qs->path, rc->commit_id,
948 			    folder, name);
949 			if (r == -1)
950 				goto done;
951 		}
952 		free(id_str);
953 		id_str = NULL;
954 		free(modestr);
955 		modestr = NULL;
956 		free(escaped_name);
957 		escaped_name = NULL;
958 	}
959 done:
960 	free(escaped_name);
961 	free(id_str);
962 	free(modestr);
963 	free(path);
964 	got_ref_list_free(&refs);
965 	if (commit)
966 		got_object_commit_close(commit);
967 	free(commit_id);
968 	free(tree_id);
969 	return error;
970 }
971 
972 const struct got_error *
973 got_output_file_blob(struct request *c)
974 {
975 	const struct got_error *error = NULL;
976 	struct transport *t = c->t;
977 	struct got_repository *repo = t->repo;
978 	struct querystring *qs = c->t->qs;
979 	struct got_commit_object *commit = NULL;
980 	struct got_object_id *commit_id = NULL;
981 	struct got_reflist_head refs;
982 	struct got_blob_object *blob = NULL;
983 	char *path = NULL, *in_repo_path = NULL;
984 	int obj_type, set_mime = 0, fd = -1;
985 	size_t len, hdrlen;
986 	const uint8_t *buf;
987 
988 	TAILQ_INIT(&refs);
989 
990 	if (asprintf(&path, "%s%s%s", qs->folder ? qs->folder : "",
991 	    qs->folder ? "/" : "", qs->file) == -1) {
992 		error = got_error_from_errno("asprintf");
993 		goto done;
994 	}
995 
996 	error = got_repo_map_path(&in_repo_path, repo, path);
997 	if (error)
998 		goto done;
999 
1000 	error = got_repo_match_object_id(&commit_id, NULL, qs->commit,
1001 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
1002 	if (error)
1003 		goto done;
1004 
1005 	error = got_object_open_as_commit(&commit, repo, commit_id);
1006 	if (error)
1007 		goto done;
1008 
1009 	error = got_object_id_by_path(&commit_id, repo, commit, in_repo_path);
1010 	if (error)
1011 		goto done;
1012 
1013 	if (commit_id == NULL) {
1014 		error = got_error(GOT_ERR_NO_OBJ);
1015 		goto done;
1016 	}
1017 
1018 	error = got_object_get_type(&obj_type, repo, commit_id);
1019 	if (error)
1020 		goto done;
1021 
1022 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
1023 		error = got_error(GOT_ERR_OBJ_TYPE);
1024 		goto done;
1025 	}
1026 
1027 	error = got_gotweb_dupfd(&c->priv_fd[BLOB_FD_1], &fd);
1028 	if (error)
1029 		goto done;
1030 
1031 	error = got_object_open_as_blob(&blob, repo, commit_id, BUF, fd);
1032 	if (error)
1033 		goto done;
1034 	hdrlen = got_object_blob_get_hdrlen(blob);
1035 	do {
1036 		error = got_object_blob_read_block(&len, blob);
1037 		if (error)
1038 			goto done;
1039 		buf = got_object_blob_get_read_buf(blob);
1040 
1041 		/*
1042 		 * Skip blob object header first time around,
1043 		 * which also contains a zero byte.
1044 		 */
1045 		buf += hdrlen;
1046 		if (set_mime == 0) {
1047 			if (isbinary(buf, len - hdrlen)) {
1048 				error = gotweb_render_content_type_file(c,
1049 				    "application/octet-stream",
1050 				    qs->file);
1051 				if (error) {
1052 					log_warnx("%s: %s", __func__,
1053 					    error->msg);
1054 					goto done;
1055 				}
1056 			} else {
1057 				error = gotweb_render_content_type(c,
1058 				  "text/plain");
1059 				if (error) {
1060 					log_warnx("%s: %s", __func__,
1061 					    error->msg);
1062 					goto done;
1063 				}
1064 			}
1065 		}
1066 		set_mime = 1;
1067 		fcgi_gen_binary_response(c, buf, len - hdrlen);
1068 
1069 		hdrlen = 0;
1070 	} while (len != 0);
1071 done:
1072 	if (commit)
1073 		got_object_commit_close(commit);
1074 	if (fd != -1 && close(fd) == -1 && error == NULL)
1075 		error = got_error_from_errno("close");
1076 	if (blob)
1077 		got_object_blob_close(blob);
1078 	free(in_repo_path);
1079 	free(commit_id);
1080 	free(path);
1081 	return error;
1082 }
1083 
1084 struct blame_line {
1085 	int annotated;
1086 	char *id_str;
1087 	char *committer;
1088 	char datebuf[11]; /* YYYY-MM-DD + NUL */
1089 };
1090 
1091 struct blame_cb_args {
1092 	struct blame_line *lines;
1093 	int nlines;
1094 	int nlines_prec;
1095 	int lineno_cur;
1096 	off_t *line_offsets;
1097 	FILE *f;
1098 	struct got_repository *repo;
1099 	struct request *c;
1100 };
1101 
1102 static const struct got_error *
1103 got_gotweb_blame_cb(void *arg, int nlines, int lineno,
1104     struct got_commit_object *commit, struct got_object_id *id)
1105 {
1106 	const struct got_error *err = NULL;
1107 	struct blame_cb_args *a = arg;
1108 	struct blame_line *bline;
1109 	struct request *c = a->c;
1110 	struct transport *t = c->t;
1111 	struct querystring *qs = t->qs;
1112 	struct repo_dir *repo_dir = t->repo_dir;
1113 	const char *index_page_str;
1114 	char *line = NULL, *eline = NULL;
1115 	size_t linesize = 0;
1116 	off_t offset;
1117 	struct tm tm;
1118 	time_t committer_time;
1119 	int r;
1120 
1121 	if (nlines != a->nlines ||
1122 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
1123 		return got_error(GOT_ERR_RANGE);
1124 
1125 	if (lineno == -1)
1126 		return NULL; /* no change in this commit */
1127 
1128 	/* Annotate this line. */
1129 	bline = &a->lines[lineno - 1];
1130 	if (bline->annotated)
1131 		return NULL;
1132 	err = got_object_id_str(&bline->id_str, id);
1133 	if (err)
1134 		return err;
1135 
1136 	bline->committer = strdup(got_object_commit_get_committer(commit));
1137 	if (bline->committer == NULL) {
1138 		err = got_error_from_errno("strdup");
1139 		goto done;
1140 	}
1141 
1142 	committer_time = got_object_commit_get_committer_time(commit);
1143 	if (gmtime_r(&committer_time, &tm) == NULL)
1144 		return got_error_from_errno("gmtime_r");
1145 	if (strftime(bline->datebuf, sizeof(bline->datebuf), "%G-%m-%d",
1146 	    &tm) == 0) {
1147 		err = got_error(GOT_ERR_NO_SPACE);
1148 		goto done;
1149 	}
1150 	bline->annotated = 1;
1151 
1152 	/* Print lines annotated so far. */
1153 	bline = &a->lines[a->lineno_cur - 1];
1154 	if (!bline->annotated)
1155 		goto done;
1156 
1157 	offset = a->line_offsets[a->lineno_cur - 1];
1158 	if (fseeko(a->f, offset, SEEK_SET) == -1) {
1159 		err = got_error_from_errno("fseeko");
1160 		goto done;
1161 	}
1162 
1163 	index_page_str = qs->index_page_str ? qs->index_page_str : "";
1164 
1165 	while (a->lineno_cur <= a->nlines && bline->annotated) {
1166 		char *smallerthan, *at, *nl, *committer;
1167 		size_t len;
1168 
1169 		if (getline(&line, &linesize, a->f) == -1) {
1170 			if (ferror(a->f))
1171 				err = got_error_from_errno("getline");
1172 			break;
1173 		}
1174 
1175 		committer = bline->committer;
1176 		smallerthan = strchr(committer, '<');
1177 		if (smallerthan && smallerthan[1] != '\0')
1178 			committer = smallerthan + 1;
1179 		at = strchr(committer, '@');
1180 		if (at)
1181 			*at = '\0';
1182 		len = strlen(committer);
1183 		if (len >= 9)
1184 			committer[8] = '\0';
1185 
1186 		nl = strchr(line, '\n');
1187 		if (nl)
1188 			*nl = '\0';
1189 
1190 		err = gotweb_escape_html(&eline, line);
1191 		if (err)
1192 			goto done;
1193 
1194 		r = fcgi_printf(c, "<div class='blame_wrapper'>"
1195 		    "<div class='blame_number'>%.*d</div>"
1196 		    "<div class='blame_hash'>"
1197 		    "<a href='?index_page=%s&path=%s&action=diff&commit=%s'>"
1198 		    "%.8s</a>"
1199 		    "</div>"
1200 		    "<div class='blame_date'>%s</div>"
1201 		    "<div class='blame_author'>%s</div>"
1202 		    "<div class='blame_code'>%s</div>"
1203 		    "</div>",	/* .blame_wrapper */
1204 		    a->nlines_prec, a->lineno_cur,
1205 		    index_page_str, repo_dir->name, bline->id_str,
1206 		    bline->id_str,
1207 		    bline->datebuf,
1208 		    committer,
1209 		    eline);
1210 		if (r == -1)
1211 			goto done;
1212 
1213 		a->lineno_cur++;
1214 		bline = &a->lines[a->lineno_cur - 1];
1215 	}
1216 done:
1217 	free(line);
1218 	free(eline);
1219 	return err;
1220 }
1221 
1222 const struct got_error *
1223 got_output_file_blame(struct request *c)
1224 {
1225 	const struct got_error *error = NULL;
1226 	struct transport *t = c->t;
1227 	struct got_repository *repo = t->repo;
1228 	struct querystring *qs = c->t->qs;
1229 	struct got_object_id *obj_id = NULL, *commit_id = NULL;
1230 	struct got_commit_object *commit = NULL;
1231 	struct got_reflist_head refs;
1232 	struct got_blob_object *blob = NULL;
1233 	char *path = NULL, *in_repo_path = NULL;
1234 	struct blame_cb_args bca;
1235 	int i, obj_type, fd1 = -1, fd2 = -1, fd3 = -1, fd4 = -1, fd5 = -1;
1236 	int fd6 = -1;
1237 	off_t filesize;
1238 	FILE *f1 = NULL, *f2 = NULL;
1239 
1240 	TAILQ_INIT(&refs);
1241 	bca.f = NULL;
1242 	bca.lines = NULL;
1243 
1244 	if (asprintf(&path, "%s%s%s", qs->folder ? qs->folder : "",
1245 	    qs->folder ? "/" : "", qs->file) == -1) {
1246 		error = got_error_from_errno("asprintf");
1247 		goto done;
1248 	}
1249 
1250 	error = got_repo_map_path(&in_repo_path, repo, path);
1251 	if (error)
1252 		goto done;
1253 
1254 	error = got_repo_match_object_id(&commit_id, NULL, qs->commit,
1255 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
1256 	if (error)
1257 		goto done;
1258 
1259 	error = got_object_open_as_commit(&commit, repo, commit_id);
1260 	if (error)
1261 		goto done;
1262 
1263 	error = got_object_id_by_path(&obj_id, repo, commit, in_repo_path);
1264 	if (error)
1265 		goto done;
1266 
1267 	if (commit_id == NULL) {
1268 		error = got_error(GOT_ERR_NO_OBJ);
1269 		goto done;
1270 	}
1271 
1272 	error = got_object_get_type(&obj_type, repo, obj_id);
1273 	if (error)
1274 		goto done;
1275 
1276 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
1277 		error = got_error(GOT_ERR_OBJ_TYPE);
1278 		goto done;
1279 	}
1280 
1281 	error = got_gotweb_openfile(&bca.f, &c->priv_fd[BLAME_FD_1], &fd1);
1282 	if (error)
1283 		goto done;
1284 
1285 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_2], &fd2);
1286 	if (error)
1287 		goto done;
1288 
1289 	error = got_object_open_as_blob(&blob, repo, obj_id, BUF, fd2);
1290 	if (error)
1291 		goto done;
1292 
1293 	error = got_object_blob_dump_to_file(&filesize, &bca.nlines,
1294 	    &bca.line_offsets, bca.f, blob);
1295 	if (error || bca.nlines == 0)
1296 		goto done;
1297 
1298 	/* Don't include \n at EOF in the blame line count. */
1299 	if (bca.line_offsets[bca.nlines - 1] == filesize)
1300 		bca.nlines--;
1301 
1302 	bca.lines = calloc(bca.nlines, sizeof(*bca.lines));
1303 	if (bca.lines == NULL) {
1304 		error = got_error_from_errno("calloc");
1305 		goto done;
1306 	}
1307 	bca.lineno_cur = 1;
1308 	bca.nlines_prec = 0;
1309 	i = bca.nlines;
1310 	while (i > 0) {
1311 		i /= 10;
1312 		bca.nlines_prec++;
1313 	}
1314 	bca.repo = repo;
1315 	bca.c = c;
1316 
1317 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_3], &fd3);
1318 	if (error)
1319 		goto done;
1320 
1321 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_4], &fd4);
1322 	if (error)
1323 		goto done;
1324 
1325 	error = got_gotweb_openfile(&f1, &c->priv_fd[BLAME_FD_5], &fd5);
1326 	if (error)
1327 		goto done;
1328 
1329 	error = got_gotweb_openfile(&f2, &c->priv_fd[BLAME_FD_6], &fd6);
1330 	if (error)
1331 		goto done;
1332 
1333 	error = got_blame(in_repo_path, commit_id, repo,
1334 	    GOT_DIFF_ALGORITHM_MYERS, got_gotweb_blame_cb, &bca, NULL, NULL,
1335 	    fd3, fd4, f1, f2);
1336 
1337 	if (blob) {
1338 		free(bca.line_offsets);
1339 		for (i = 0; i < bca.nlines; i++) {
1340 			struct blame_line *bline = &bca.lines[i];
1341 			free(bline->id_str);
1342 			free(bline->committer);
1343 		}
1344 	}
1345 done:
1346 	free(bca.lines);
1347 	if (fd2 != -1 && close(fd2) == -1 && error == NULL)
1348 		error = got_error_from_errno("close");
1349 	if (fd3 != -1 && close(fd3) == -1 && error == NULL)
1350 		error = got_error_from_errno("close");
1351 	if (fd4 != -1 && close(fd4) == -1 && error == NULL)
1352 		error = got_error_from_errno("close");
1353 	if (bca.f) {
1354 		const struct got_error *bca_err =
1355 		    got_gotweb_flushfile(bca.f, fd1);
1356 		if (error == NULL)
1357 			error = bca_err;
1358 	}
1359 	if (f1) {
1360 		const struct got_error *f1_err =
1361 		    got_gotweb_flushfile(f1, fd5);
1362 		if (error == NULL)
1363 			error = f1_err;
1364 	}
1365 	if (f2) {
1366 		const struct got_error *f2_err =
1367 		    got_gotweb_flushfile(f2, fd6);
1368 		if (error == NULL)
1369 			error = f2_err;
1370 	}
1371 	if (commit)
1372 		got_object_commit_close(commit);
1373 	if (blob)
1374 		got_object_blob_close(blob);
1375 	free(in_repo_path);
1376 	free(commit_id);
1377 	free(path);
1378 	return error;
1379 }
1380 
1381 const struct got_error *
1382 got_output_repo_diff(struct request *c)
1383 {
1384 	const struct got_error *error = NULL;
1385 	struct transport *t = c->t;
1386 	struct got_repository *repo = t->repo;
1387 	struct repo_commit *rc = NULL;
1388 	struct got_object_id *id1 = NULL, *id2 = NULL;
1389 	struct got_reflist_head refs;
1390 	FILE *f1 = NULL, *f2 = NULL, *f3 = NULL;
1391 	char *label1 = NULL, *label2 = NULL, *line = NULL;
1392 	char *newline, *eline = NULL, *color = NULL;
1393 	int obj_type, fd1, fd2, fd3, fd4 = -1, fd5 = -1;
1394 	size_t linesize = 0;
1395 	ssize_t linelen;
1396 	int wrlen = 0;
1397 
1398 	TAILQ_INIT(&refs);
1399 
1400 	error = got_gotweb_openfile(&f1, &c->priv_fd[DIFF_FD_1], &fd1);
1401 	if (error)
1402 		return error;
1403 
1404 	error = got_gotweb_openfile(&f2, &c->priv_fd[DIFF_FD_2], &fd2);
1405 	if (error)
1406 		return error;
1407 
1408 	error = got_gotweb_openfile(&f3, &c->priv_fd[DIFF_FD_3], &fd3);
1409 	if (error)
1410 		return error;
1411 
1412 	rc = TAILQ_FIRST(&t->repo_commits);
1413 
1414 	if (rc->parent_id != NULL &&
1415 	    strncmp(rc->parent_id, "/dev/null", 9) != 0) {
1416 		error = got_repo_match_object_id(&id1, &label1,
1417 		    rc->parent_id, GOT_OBJ_TYPE_ANY,
1418 		    &refs, repo);
1419 		if (error)
1420 			goto done;
1421 	}
1422 
1423 	error = got_repo_match_object_id(&id2, &label2, rc->commit_id,
1424 	    GOT_OBJ_TYPE_ANY, &refs, repo);
1425 	if (error)
1426 		goto done;
1427 
1428 	error = got_object_get_type(&obj_type, repo, id2);
1429 	if (error)
1430 		goto done;
1431 
1432 	error = got_gotweb_dupfd(&c->priv_fd[DIFF_FD_4], &fd4);
1433 	if (error)
1434 		goto done;
1435 
1436 	error = got_gotweb_dupfd(&c->priv_fd[DIFF_FD_5], &fd5);
1437 	if (error)
1438 		goto done;
1439 
1440 	switch (obj_type) {
1441 	case GOT_OBJ_TYPE_BLOB:
1442 		error = got_diff_objects_as_blobs(NULL, NULL, f1, f2, fd4, fd5,
1443 		     id1, id2, NULL, NULL, GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1444 		     repo, f3);
1445 		break;
1446 	case GOT_OBJ_TYPE_TREE:
1447 		error = got_diff_objects_as_trees(NULL, NULL, f1, f2, fd4, fd5,
1448 		    id1, id2, NULL, "", "",  GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1449 		    repo, f3);
1450 		break;
1451 	case GOT_OBJ_TYPE_COMMIT:
1452 		error = got_diff_objects_as_commits(NULL, NULL, f1, f2, fd4,
1453 		    fd5, id1, id2, NULL,  GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1454 		    repo, f3);
1455 		break;
1456 	default:
1457 		error = got_error(GOT_ERR_OBJ_TYPE);
1458 	}
1459 	if (error)
1460 		goto done;
1461 
1462 	if (fseek(f1, 0, SEEK_SET) == -1) {
1463 		error = got_ferror(f1, GOT_ERR_IO);
1464 		goto done;
1465 	}
1466 
1467 	if (fseek(f2, 0, SEEK_SET) == -1) {
1468 		error = got_ferror(f2, GOT_ERR_IO);
1469 		goto done;
1470 	}
1471 
1472 	if (fseek(f3, 0, SEEK_SET) == -1) {
1473 		error = got_ferror(f3, GOT_ERR_IO);
1474 		goto done;
1475 	}
1476 
1477 	while ((linelen = getline(&line, &linesize, f3)) != -1) {
1478 		if (strncmp(line, "-", 1) == 0) {
1479 			color = strdup("diff_minus");
1480 			if (color == NULL) {
1481 				error = got_error_from_errno("strdup");
1482 				goto done;
1483 			}
1484 		} else if (strncmp(line, "+", 1) == 0) {
1485 			color = strdup("diff_plus");
1486 			if (color == NULL) {
1487 				error = got_error_from_errno("strdup");
1488 				goto done;
1489 			}
1490 		} else if (strncmp(line, "@@", 2) == 0) {
1491 			color = strdup("diff_chunk_header");
1492 			if (color == NULL) {
1493 				error = got_error_from_errno("strdup");
1494 				goto done;
1495 			}
1496 		} else if (strncmp(line, "@@", 2) == 0) {
1497 			color = strdup("diff_chunk_header");
1498 			if (color == NULL) {
1499 				error = got_error_from_errno("strdup");
1500 				goto done;
1501 			}
1502 		} else if (strncmp(line, "commit +", 8) == 0) {
1503 			color = strdup("diff_meta");
1504 			if (color == NULL) {
1505 				error = got_error_from_errno("strdup");
1506 				goto done;
1507 			}
1508 		} else if (strncmp(line, "commit -", 8) == 0) {
1509 			color = strdup("diff_meta");
1510 			if (color == NULL) {
1511 				error = got_error_from_errno("strdup");
1512 				goto done;
1513 			}
1514 		} else if (strncmp(line, "blob +", 6) == 0) {
1515 			color = strdup("diff_meta");
1516 			if (color == NULL) {
1517 				error = got_error_from_errno("strdup");
1518 				goto done;
1519 			}
1520 		} else if (strncmp(line, "blob -", 6) == 0) {
1521 			color = strdup("diff_meta");
1522 			if (color == NULL) {
1523 				error = got_error_from_errno("strdup");
1524 				goto done;
1525 			}
1526 		} else if (strncmp(line, "file +", 6) == 0) {
1527 			color = strdup("diff_meta");
1528 			if (color == NULL) {
1529 				error = got_error_from_errno("strdup");
1530 				goto done;
1531 			}
1532 		} else if (strncmp(line, "file -", 6) == 0) {
1533 			color = strdup("diff_meta");
1534 			if (color == NULL) {
1535 				error = got_error_from_errno("strdup");
1536 				goto done;
1537 			}
1538 		} else if (strncmp(line, "from:", 5) == 0) {
1539 			color = strdup("diff_author");
1540 			if (color == NULL) {
1541 				error = got_error_from_errno("strdup");
1542 				goto done;
1543 			}
1544 		} else if (strncmp(line, "via:", 4) == 0) {
1545 			color = strdup("diff_author");
1546 			if (color == NULL) {
1547 				error = got_error_from_errno("strdup");
1548 				goto done;
1549 			}
1550 		} else if (strncmp(line, "date:", 5) == 0) {
1551 			color = strdup("diff_date");
1552 			if (color == NULL) {
1553 				error = got_error_from_errno("strdup");
1554 				goto done;
1555 			}
1556 		}
1557 
1558 		newline = strchr(line, '\n');
1559 		if (newline)
1560 			*newline = '\0';
1561 
1562 		error = gotweb_escape_html(&eline, line);
1563 		if (error)
1564 			goto done;
1565 
1566 		fcgi_printf(c, "<div class='diff_line %s'>%s</div>\n",
1567 		    color ? color : "", eline);
1568 		free(eline);
1569 		eline = NULL;
1570 
1571 		if (linelen > 0)
1572 			wrlen = wrlen + linelen;
1573 		free(color);
1574 		color = NULL;
1575 	}
1576 	if (linelen == -1 && ferror(f3))
1577 		error = got_error_from_errno("getline");
1578 done:
1579 	free(color);
1580 	if (fd4 != -1 && close(fd4) == -1 && error == NULL)
1581 		error = got_error_from_errno("close");
1582 	if (fd5 != -1 && close(fd5) == -1 && error == NULL)
1583 		error = got_error_from_errno("close");
1584 	if (f1) {
1585 		const struct got_error *f1_err =
1586 		    got_gotweb_flushfile(f1, fd1);
1587 		if (error == NULL)
1588 			error = f1_err;
1589 	}
1590 	if (f2) {
1591 		const struct got_error *f2_err =
1592 		    got_gotweb_flushfile(f2, fd2);
1593 		if (error == NULL)
1594 			error = f2_err;
1595 	}
1596 	if (f3) {
1597 		const struct got_error *f3_err =
1598 		    got_gotweb_flushfile(f3, fd3);
1599 		if (error == NULL)
1600 			error = f3_err;
1601 	}
1602 	got_ref_list_free(&refs);
1603 	free(line);
1604 	free(eline);
1605 	free(label1);
1606 	free(label2);
1607 	free(id1);
1608 	free(id2);
1609 	return error;
1610 }
1611 
1612 static const struct got_error *
1613 got_init_repo_commit(struct repo_commit **rc)
1614 {
1615 	*rc = calloc(1, sizeof(**rc));
1616 	if (*rc == NULL)
1617 		return got_error_from_errno2("%s: calloc", __func__);
1618 
1619 	(*rc)->path = NULL;
1620 	(*rc)->refs_str = NULL;
1621 	(*rc)->commit_id = NULL;
1622 	(*rc)->committer = NULL;
1623 	(*rc)->author = NULL;
1624 	(*rc)->parent_id = NULL;
1625 	(*rc)->tree_id = NULL;
1626 	(*rc)->commit_msg = NULL;
1627 
1628 	return NULL;
1629 }
1630 
1631 static const struct got_error *
1632 got_init_repo_tag(struct repo_tag **rt)
1633 {
1634 	*rt = calloc(1, sizeof(**rt));
1635 	if (*rt == NULL)
1636 		return got_error_from_errno2("%s: calloc", __func__);
1637 
1638 	(*rt)->commit_id = NULL;
1639 	(*rt)->tag_name = NULL;
1640 	(*rt)->tag_commit = NULL;
1641 	(*rt)->commit_msg = NULL;
1642 	(*rt)->tagger = NULL;
1643 
1644 	return NULL;
1645 }