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Date:: Thu Jul 28 14:26:46 2022 UTC
Message:: gotwebd: simplify got_output_file_blob loop there's no need to distinguish between plain text blob and a binary one in the output, just send it chunk by chunk. ok tracey@
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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 	const struct got_error *error = NULL;
87 
88 	*fd = dup(*priv_fd);
89 
90 	if (*fd < 0)
91 		return NULL;
92 
93 	*f = fdopen(*fd, "w+");
94 	if (*f == NULL) {
95 		close(*fd);
96 		error = got_error(GOT_ERR_PRIVSEP_NO_FD);
97 	}
98 
99 	return error;
100 }
101 
102 static const struct got_error *
103 got_gotweb_dupfd(int *priv_fd, int *fd)
104 {
105 	const struct got_error *error = NULL;
106 
107 	*fd = dup(*priv_fd);
108 
109 	if (*fd < 0)
110 		return NULL;
111 
112 	return error;
113 }
114 
115 const struct got_error *
116 got_get_repo_owner(char **owner, struct request *c, char *dir)
117 {
118 	const struct got_error *error = NULL;
119 	struct server *srv = c->srv;
120 	struct transport *t = c->t;
121 	struct got_repository *repo = t->repo;
122 	const char *gitconfig_owner;
123 
124 	*owner = NULL;
125 
126 	if (srv->show_repo_owner == 0)
127 		return NULL;
128 
129 	gitconfig_owner = got_repo_get_gitconfig_owner(repo);
130 	if (gitconfig_owner) {
131 		*owner = strdup(gitconfig_owner);
132 		if (*owner == NULL)
133 			return got_error_from_errno("strdup");
134 	}
135 	return error;
136 }
137 
138 const struct got_error *
139 got_get_repo_age(char **repo_age, struct request *c, char *dir,
140     const char *refname, int ref_tm)
141 {
142 	const struct got_error *error = NULL;
143 	struct server *srv = c->srv;
144 	struct transport *t = c->t;
145 	struct got_repository *repo = t->repo;
146 	struct got_commit_object *commit = NULL;
147 	struct got_reflist_head refs;
148 	struct got_reflist_entry *re;
149 	time_t committer_time = 0, cmp_time = 0;
150 
151 	*repo_age = NULL;
152 	TAILQ_INIT(&refs);
153 
154 	if (srv->show_repo_age == 0)
155 		return NULL;
156 
157 	error = got_ref_list(&refs, repo, "refs/heads",
158 	    got_ref_cmp_by_name, NULL);
159 	if (error)
160 		goto done;
161 
162 	/*
163 	 * Find the youngest branch tip in the repository, or the age of
164 	 * the a specific branch tip if a name was provided by the caller.
165 	 */
166 	TAILQ_FOREACH(re, &refs, entry) {
167 		struct got_object_id *id = NULL;
168 
169 		if (refname && strcmp(got_ref_get_name(re->ref), refname) != 0)
170 			continue;
171 
172 		error = got_ref_resolve(&id, repo, re->ref);
173 		if (error)
174 			goto done;
175 
176 		error = got_object_open_as_commit(&commit, repo, id);
177 		free(id);
178 		if (error)
179 			goto done;
180 
181 		committer_time =
182 		    got_object_commit_get_committer_time(commit);
183 		got_object_commit_close(commit);
184 		if (cmp_time < committer_time)
185 			cmp_time = committer_time;
186 
187 		if (refname)
188 			break;
189 	}
190 
191 	if (cmp_time != 0) {
192 		committer_time = cmp_time;
193 		error = gotweb_get_time_str(repo_age, committer_time, ref_tm);
194 	}
195 done:
196 	got_ref_list_free(&refs);
197 	return error;
198 }
199 
200 static const struct got_error *
201 got_get_repo_commit(struct request *c, struct repo_commit *repo_commit,
202     struct got_commit_object *commit, struct got_reflist_head *refs,
203     struct got_object_id *id)
204 {
205 	const struct got_error *error = NULL;
206 	struct got_reflist_entry *re;
207 	struct got_object_id *id2 = NULL;
208 	struct got_object_qid *parent_id;
209 	struct transport *t = c->t;
210 	struct querystring *qs = c->t->qs;
211 	char *commit_msg = NULL, *commit_msg0;
212 
213 	TAILQ_FOREACH(re, refs, entry) {
214 		char *s;
215 		const char *name;
216 		struct got_tag_object *tag = NULL;
217 		struct got_object_id *ref_id;
218 		int cmp;
219 
220 		if (got_ref_is_symbolic(re->ref))
221 			continue;
222 
223 		name = got_ref_get_name(re->ref);
224 		if (strncmp(name, "refs/", 5) == 0)
225 			name += 5;
226 		if (strncmp(name, "got/", 4) == 0)
227 			continue;
228 		if (strncmp(name, "heads/", 6) == 0)
229 			name += 6;
230 		if (strncmp(name, "remotes/", 8) == 0) {
231 			name += 8;
232 			s = strstr(name, "/" GOT_REF_HEAD);
233 			if (s != NULL && s[strlen(s)] == '\0')
234 				continue;
235 		}
236 		error = got_ref_resolve(&ref_id, t->repo, re->ref);
237 		if (error)
238 			return error;
239 		if (strncmp(name, "tags/", 5) == 0) {
240 			error = got_object_open_as_tag(&tag, t->repo, ref_id);
241 			if (error) {
242 				if (error->code != GOT_ERR_OBJ_TYPE) {
243 					free(ref_id);
244 					continue;
245 				}
246 				/*
247 				 * Ref points at something other
248 				 * than a tag.
249 				 */
250 				error = NULL;
251 				tag = NULL;
252 			}
253 		}
254 		cmp = got_object_id_cmp(tag ?
255 		    got_object_tag_get_object_id(tag) : ref_id, id);
256 		free(ref_id);
257 		if (tag)
258 			got_object_tag_close(tag);
259 		if (cmp != 0)
260 			continue;
261 		s = repo_commit->refs_str;
262 		if (asprintf(&repo_commit->refs_str, "%s%s%s", s ? s : "",
263 		    s ? ", " : "", name) == -1) {
264 			error = got_error_from_errno("asprintf");
265 			free(s);
266 			repo_commit->refs_str = NULL;
267 			return error;
268 		}
269 		free(s);
270 	}
271 
272 	error = got_object_id_str(&repo_commit->commit_id, id);
273 	if (error)
274 		return error;
275 
276 	error = got_object_id_str(&repo_commit->tree_id,
277 	    got_object_commit_get_tree_id(commit));
278 	if (error)
279 		return error;
280 
281 	if (qs->action == DIFF) {
282 		parent_id = STAILQ_FIRST(
283 		    got_object_commit_get_parent_ids(commit));
284 		if (parent_id != NULL) {
285 			id2 = got_object_id_dup(&parent_id->id);
286 			error = got_object_id_str(&repo_commit->parent_id, id2);
287 			if (error)
288 				return error;
289 			free(id2);
290 		} else {
291 			repo_commit->parent_id = strdup("/dev/null");
292 			if (repo_commit->parent_id == NULL) {
293 				error = got_error_from_errno("strdup");
294 				return error;
295 			}
296 		}
297 	}
298 
299 	repo_commit->committer_time =
300 	    got_object_commit_get_committer_time(commit);
301 
302 	repo_commit->author =
303 	    strdup(got_object_commit_get_author(commit));
304 	if (repo_commit->author == NULL) {
305 		error = got_error_from_errno("strdup");
306 		return error;
307 	}
308 	repo_commit->committer =
309 	    strdup(got_object_commit_get_committer(commit));
310 	if (repo_commit->committer == NULL) {
311 		error = got_error_from_errno("strdup");
312 		return error;
313 	}
314 	error = got_object_commit_get_logmsg(&commit_msg0, commit);
315 	if (error)
316 		return error;
317 
318 	commit_msg = commit_msg0;
319 	while (*commit_msg == '\n')
320 		commit_msg++;
321 
322 	repo_commit->commit_msg = strdup(commit_msg);
323 	if (repo_commit->commit_msg == NULL)
324 		error = got_error_from_errno("strdup");
325 	free(commit_msg0);
326 	return error;
327 }
328 
329 const struct got_error *
330 got_get_repo_commits(struct request *c, int limit)
331 {
332 	const struct got_error *error = NULL;
333 	struct got_object_id *id = NULL;
334 	struct got_commit_graph *graph = NULL;
335 	struct got_commit_object *commit = NULL;
336 	struct got_reflist_head refs;
337 	struct got_reference *ref;
338 	struct repo_commit *repo_commit = NULL;
339 	struct server *srv = c->srv;
340 	struct transport *t = c->t;
341 	struct got_repository *repo = t->repo;
342 	struct querystring *qs = t->qs;
343 	struct repo_dir *repo_dir = t->repo_dir;
344 	char *in_repo_path = NULL, *repo_path = NULL, *file_path = NULL;
345 	int chk_next = 0, chk_multi = 0, commit_found = 0;
346 	int obj_type, limit_chk = 0;
347 
348 	TAILQ_INIT(&refs);
349 
350 	if (qs->file != NULL && strlen(qs->file) > 0)
351 		if (asprintf(&file_path, "%s/%s", qs->folder ? qs->folder : "",
352 		    qs->file) == -1)
353 			return got_error_from_errno("asprintf");
354 
355 	if (asprintf(&repo_path, "%s/%s", srv->repos_path,
356 	    repo_dir->name) == -1)
357 		return got_error_from_errno("asprintf");
358 
359 	error = got_init_repo_commit(&repo_commit);
360 	if (error)
361 		return error;
362 
363 	/*
364 	 * XXX: jumping directly to a commit id via
365 	 * got_repo_match_object_id_prefix significantly improves performance,
366 	 * but does not allow us to create a PREVIOUS button, since commits can
367 	 * only be itereated forward. So, we have to match as we iterate from
368 	 * the headref.
369 	 */
370 	if (qs->action == BRIEFS || qs->action == COMMITS ||
371 	    (qs->action == TREE && qs->commit == NULL)) {
372 		error = got_ref_open(&ref, repo, qs->headref, 0);
373 		if (error)
374 			goto done;
375 
376 		error = got_ref_resolve(&id, repo, ref);
377 		got_ref_close(ref);
378 		if (error)
379 			goto done;
380 	} else if (qs->commit != NULL) {
381 		error = got_ref_open(&ref, repo, qs->commit, 0);
382 		if (error == NULL) {
383 			error = got_ref_resolve(&id, repo, ref);
384 			if (error)
385 				goto done;
386 			error = got_object_get_type(&obj_type, repo, id);
387 			got_ref_close(ref);
388 			if (error)
389 				goto done;
390 			if (obj_type == GOT_OBJ_TYPE_TAG) {
391 				struct got_tag_object *tag;
392 				error = got_object_open_as_tag(&tag, repo, id);
393 				if (error)
394 					goto done;
395 				if (got_object_tag_get_object_type(tag) !=
396 				    GOT_OBJ_TYPE_COMMIT) {
397 					got_object_tag_close(tag);
398 					error = got_error(GOT_ERR_OBJ_TYPE);
399 					goto done;
400 				}
401 				free(id);
402 				id = got_object_id_dup(
403 				    got_object_tag_get_object_id(tag));
404 				if (id == NULL)
405 					error = got_error_from_errno(
406 					    "got_object_id_dup");
407 				got_object_tag_close(tag);
408 				if (error)
409 					goto done;
410 			} else if (obj_type != GOT_OBJ_TYPE_COMMIT) {
411 				error = got_error(GOT_ERR_OBJ_TYPE);
412 				goto done;
413 			}
414 		}
415 		error = got_repo_match_object_id_prefix(&id, qs->commit,
416 		    GOT_OBJ_TYPE_COMMIT, repo);
417 		if (error)
418 			goto done;
419 	}
420 
421 	error = got_repo_map_path(&in_repo_path, repo, repo_path);
422 	if (error)
423 		goto done;
424 
425 	error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name, NULL);
426 	if (error)
427 		goto done;
428 
429 	if (qs->file != NULL && strlen(qs->file) > 0) {
430 		error = got_commit_graph_open(&graph, file_path, 0);
431 		if (error)
432 			goto done;
433 	} else {
434 		error = got_commit_graph_open(&graph, in_repo_path, 0);
435 		if (error)
436 			goto done;
437 	}
438 
439 	error = got_commit_graph_iter_start(graph, id, repo, NULL, NULL);
440 	if (error)
441 		goto done;
442 
443 	for (;;) {
444 		if (limit_chk == ((limit * qs->page) - (limit - 1)) &&
445 		    commit_found == 0 && repo_commit->commit_id != NULL) {
446 			t->prev_id = strdup(repo_commit->commit_id);
447 			if (t->prev_id == NULL) {
448 				error = got_error_from_errno("strdup");
449 				goto done;
450 			}
451 		}
452 
453 		error = got_commit_graph_iter_next(&id, graph, repo, NULL,
454 		    NULL);
455 		if (error) {
456 			if (error->code == GOT_ERR_ITER_COMPLETED)
457 				error = NULL;
458 			goto done;
459 		}
460 		if (id == NULL)
461 			goto done;
462 
463 		error = got_object_open_as_commit(&commit, repo, id);
464 		if (error)
465 			goto done;
466 
467 		error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name,
468 		    NULL);
469 		if (error)
470 			goto done;
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 		struct repo_commit *new_repo_commit = NULL;
492 		error = got_init_repo_commit(&new_repo_commit);
493 		if (error)
494 			goto done;
495 
496 		TAILQ_INSERT_TAIL(&t->repo_commits, new_repo_commit, entry);
497 
498 		error = got_get_repo_commit(c, new_repo_commit, commit,
499 		    &refs, id);
500 		if (error)
501 			goto done;
502 
503 		free(id);
504 		id = NULL;
505 
506 		if (limit == 1 && chk_multi == 0 &&
507 		    srv->max_commits_display != 1)
508 			commit_found = 1;
509 		else {
510 			chk_multi = 1;
511 
512 			/*
513 			 * check for one more commit before breaking,
514 			 * so we know whether to navigate through briefs
515 			 * commits and summary
516 			 */
517 			if (chk_next && (qs->action == BRIEFS ||
518 			    qs->action == COMMITS || qs->action == SUMMARY)) {
519 				t->next_id = strdup(new_repo_commit->commit_id);
520 				if (t->next_id == NULL) {
521 					error = got_error_from_errno("strdup");
522 					goto done;
523 				}
524 				if (commit) {
525 					got_object_commit_close(commit);
526 					commit = NULL;
527 				}
528 				if (t->next_id == NULL) {
529 					error = got_error_from_errno("strdup");
530 					goto done;
531 				}
532 				TAILQ_REMOVE(&t->repo_commits, new_repo_commit,
533 				    entry);
534 				gotweb_free_repo_commit(new_repo_commit);
535 				goto done;
536 			}
537 		}
538 		got_ref_list_free(&refs);
539 		if (error || (limit && --limit == 0)) {
540 			if (commit_found || (qs->file != NULL &&
541 			    strlen(qs->file) > 0))
542 				if (chk_multi == 0)
543 					break;
544 			chk_next = 1;
545 		}
546 		if (commit) {
547 			got_object_commit_close(commit);
548 			commit = NULL;
549 		}
550 	}
551 done:
552 	gotweb_free_repo_commit(repo_commit);
553 	if (commit)
554 		got_object_commit_close(commit);
555 	if (graph)
556 		got_commit_graph_close(graph);
557 	got_ref_list_free(&refs);
558 	free(file_path);
559 	free(repo_path);
560 	free(id);
561 	return error;
562 }
563 
564 const struct got_error *
565 got_get_repo_tags(struct request *c, int limit)
566 {
567 	const struct got_error *error = NULL;
568 	struct got_object_id *id = NULL;
569 	struct got_commit_object *commit = NULL;
570 	struct got_reflist_head refs;
571 	struct got_reference *ref;
572 	struct got_reflist_entry *re;
573 	struct server *srv = c->srv;
574 	struct transport *t = c->t;
575 	struct got_repository *repo = t->repo;
576 	struct querystring *qs = t->qs;
577 	struct repo_dir *repo_dir = t->repo_dir;
578 	struct got_tag_object *tag = NULL;
579 	struct repo_tag *rt = NULL, *trt = NULL;
580 	char *in_repo_path = NULL, *repo_path = NULL, *id_str = NULL;
581 	char *commit_msg = NULL, *commit_msg0 = NULL;
582 	int chk_next = 0, chk_multi = 1, commit_found = 0, c_cnt = 0;
583 
584 	TAILQ_INIT(&refs);
585 
586 	if (asprintf(&repo_path, "%s/%s", srv->repos_path,
587 	    repo_dir->name) == -1)
588 		return got_error_from_errno("asprintf");
589 
590 	if (error)
591 		return error;
592 
593 	if (qs->commit == NULL && qs->action == TAGS) {
594 		error = got_ref_open(&ref, repo, qs->headref, 0);
595 		if (error)
596 			goto err;
597 		error = got_ref_resolve(&id, repo, ref);
598 		got_ref_close(ref);
599 		if (error)
600 			goto err;
601 	} else if (qs->commit == NULL && qs->action == TAG) {
602 		error = got_error_msg(GOT_ERR_EOF, "commit id missing");
603 		goto err;
604 	} else {
605 		error = got_repo_match_object_id_prefix(&id, qs->commit,
606 		    GOT_OBJ_TYPE_COMMIT, repo);
607 		if (error)
608 			goto err;
609 	}
610 
611 	if (qs->action != SUMMARY && qs->action != TAGS) {
612 		error = got_object_open_as_commit(&commit, repo, id);
613 		if (error)
614 			goto err;
615 		error = got_object_commit_get_logmsg(&commit_msg0, commit);
616 		if (error)
617 			goto err;
618 		if (commit) {
619 			got_object_commit_close(commit);
620 			commit = NULL;
621 		}
622 	}
623 
624 	error = got_repo_map_path(&in_repo_path, repo, repo_path);
625 	if (error)
626 		goto err;
627 
628 	error = got_ref_list(&refs, repo, "refs/tags", got_ref_cmp_tags,
629 	   repo);
630 	if (error)
631 		goto err;
632 
633 	if (limit == 1)
634 		chk_multi = 0;
635 
636 	/*
637 	 * XXX: again, see previous message about caching
638 	 */
639 
640 	TAILQ_FOREACH(re, &refs, entry) {
641 		struct repo_tag *new_repo_tag = NULL;
642 		error = got_init_repo_tag(&new_repo_tag);
643 		if (error)
644 			goto err;
645 
646 		TAILQ_INSERT_TAIL(&t->repo_tags, new_repo_tag, entry);
647 
648 		new_repo_tag->tag_name = strdup(got_ref_get_name(re->ref));
649 		if (new_repo_tag->tag_name == NULL) {
650 			error = got_error_from_errno("strdup");
651 			goto err;
652 		}
653 
654 		error = got_ref_resolve(&id, repo, re->ref);
655 		if (error)
656 			goto done;
657 
658 		error = got_object_open_as_tag(&tag, repo, id);
659 		if (error) {
660 			if (error->code != GOT_ERR_OBJ_TYPE) {
661 				free(id);
662 				id = NULL;
663 				goto done;
664 			}
665 			/* "lightweight" tag */
666 			error = got_object_open_as_commit(&commit, repo, id);
667 			if (error) {
668 				free(id);
669 				id = NULL;
670 				goto done;
671 			}
672 			new_repo_tag->tagger =
673 			    strdup(got_object_commit_get_committer(commit));
674 			if (new_repo_tag->tagger == NULL) {
675 				error = got_error_from_errno("strdup");
676 				goto err;
677 			}
678 			new_repo_tag->tagger_time =
679 			    got_object_commit_get_committer_time(commit);
680 			error = got_object_id_str(&id_str, id);
681 			if (error)
682 				goto err;
683 			free(id);
684 			id = NULL;
685 		} else {
686 			free(id);
687 			id = NULL;
688 			new_repo_tag->tagger =
689 			    strdup(got_object_tag_get_tagger(tag));
690 			if (new_repo_tag->tagger == NULL) {
691 				error = got_error_from_errno("strdup");
692 				goto err;
693 			}
694 			new_repo_tag->tagger_time =
695 			    got_object_tag_get_tagger_time(tag);
696 			error = got_object_id_str(&id_str,
697 			    got_object_tag_get_object_id(tag));
698 			if (error)
699 				goto err;
700 		}
701 
702 		new_repo_tag->commit_id = strdup(id_str);
703 		if (new_repo_tag->commit_id == NULL)
704 			goto err;
705 
706 		if (commit_found == 0 && qs->commit != NULL &&
707 		    strncmp(id_str, qs->commit, strlen(id_str)) != 0)
708 			continue;
709 		else
710 			commit_found = 1;
711 
712 		t->tag_count++;
713 
714 		/*
715 		 * check for one more commit before breaking,
716 		 * so we know whether to navigate through briefs
717 		 * commits and summary
718 		 */
719 		if (chk_next) {
720 			t->next_id = strdup(new_repo_tag->commit_id);
721 			if (t->next_id == NULL) {
722 				error = got_error_from_errno("strdup");
723 				goto err;
724 			}
725 			if (commit) {
726 				got_object_commit_close(commit);
727 				commit = NULL;
728 			}
729 			if (t->next_id == NULL) {
730 				error = got_error_from_errno("strdup");
731 				goto err;
732 			}
733 			TAILQ_REMOVE(&t->repo_tags, new_repo_tag, entry);
734 			gotweb_free_repo_tag(new_repo_tag);
735 			goto done;
736 		}
737 
738 		if (commit) {
739 			error = got_object_commit_get_logmsg(&new_repo_tag->
740 			    tag_commit, commit);
741 			if (error)
742 				goto done;
743 			got_object_commit_close(commit);
744 			commit = NULL;
745 		} else {
746 			new_repo_tag->tag_commit =
747 			    strdup(got_object_tag_get_message(tag));
748 			if (new_repo_tag->tag_commit == NULL) {
749 				error = got_error_from_errno("strdup");
750 				goto done;
751 			}
752 		}
753 
754 		while (*new_repo_tag->tag_commit == '\n')
755 			new_repo_tag->tag_commit++;
756 
757 		if (qs->action != SUMMARY && qs->action != TAGS) {
758 			commit_msg = commit_msg0;
759 			while (*commit_msg == '\n')
760 				commit_msg++;
761 
762 			new_repo_tag->commit_msg = strdup(commit_msg);
763 			if (new_repo_tag->commit_msg == NULL) {
764 				error = got_error_from_errno("strdup");
765 				free(commit_msg0);
766 				goto err;
767 			}
768 			free(commit_msg0);
769 		}
770 
771 		if (limit && --limit == 0) {
772 			if (chk_multi == 0)
773 				break;
774 			chk_next = 1;
775 		}
776 		free(id);
777 		id = NULL;
778 	}
779 
780 done:
781 	/*
782 	 * we have tailq populated, so find previous commit id
783 	 * for navigation through briefs and commits
784 	 */
785 	if (t->tag_count == 0) {
786 		TAILQ_FOREACH_SAFE(rt, &t->repo_tags, entry, trt) {
787 			TAILQ_REMOVE(&t->repo_tags, rt, entry);
788 			gotweb_free_repo_tag(rt);
789 		}
790 	}
791 	if (t->tag_count > 0 && t->prev_id == NULL && qs->commit != NULL) {
792 		commit_found = 0;
793 		TAILQ_FOREACH_REVERSE(rt, &t->repo_tags, repo_tags_head,
794 		    entry) {
795 			if (commit_found == 0 && rt->commit_id != NULL &&
796 			    strcmp(qs->commit, rt->commit_id) != 0) {
797 				continue;
798 			} else
799 				commit_found = 1;
800 			if (c_cnt == srv->max_commits_display ||
801 			    rt == TAILQ_FIRST(&t->repo_tags)) {
802 				t->prev_id = strdup(rt->commit_id);
803 				if (t->prev_id == NULL)
804 					error = got_error_from_errno("strdup");
805 				break;
806 			}
807 			c_cnt++;
808 		}
809 	}
810 err:
811 	if (commit)
812 		got_object_commit_close(commit);
813 	got_ref_list_free(&refs);
814 	free(repo_path);
815 	free(id);
816 	return error;
817 }
818 
819 const struct got_error *
820 got_output_repo_tree(struct request *c)
821 {
822 	const struct got_error *error = NULL;
823 	struct transport *t = c->t;
824 	struct got_commit_object *commit = NULL;
825 	struct got_repository *repo = t->repo;
826 	struct querystring *qs = t->qs;
827 	struct repo_commit *rc = NULL;
828 	struct got_object_id *tree_id = NULL, *commit_id = NULL;
829 	struct got_reflist_head refs;
830 	struct got_tree_object *tree = NULL;
831 	struct repo_dir *repo_dir = t->repo_dir;
832 	char *id_str = NULL;
833 	char *path = NULL, *in_repo_path = NULL, *build_folder = NULL;
834 	char *modestr = NULL, *name = NULL, *class = NULL;
835 	int nentries, i, class_flip = 0;
836 
837 	TAILQ_INIT(&refs);
838 
839 	rc = TAILQ_FIRST(&t->repo_commits);
840 
841 	if (qs->folder != NULL) {
842 		path = strdup(qs->folder);
843 		if (path == NULL) {
844 			error = got_error_from_errno("strdup");
845 			goto done;
846 		}
847 	} else {
848 		error = got_repo_map_path(&in_repo_path, repo, repo_dir->path);
849 		if (error)
850 			goto done;
851 		free(path);
852 		path = in_repo_path;
853 	}
854 
855 	error = got_repo_match_object_id(&commit_id, NULL, rc->commit_id,
856 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
857 	if (error)
858 		goto done;
859 
860 	error = got_object_open_as_commit(&commit, repo, commit_id);
861 	if (error)
862 		goto done;
863 
864 	error = got_object_id_by_path(&tree_id, repo, commit, path);
865 	if (error)
866 		goto done;
867 
868 	error = got_object_open_as_tree(&tree, repo, tree_id);
869 	if (error)
870 		goto done;
871 
872 	nentries = got_object_tree_get_nentries(tree);
873 
874 	for (i = 0; i < nentries; i++) {
875 		struct got_tree_entry *te;
876 		mode_t mode;
877 
878 		te = got_object_tree_get_entry(tree, i);
879 
880 		error = got_object_id_str(&id_str, got_tree_entry_get_id(te));
881 		if (error)
882 			goto done;
883 
884 		modestr = strdup("");
885 		if (modestr == NULL) {
886 			error = got_error_from_errno("strdup");
887 			goto done;
888 		}
889 		mode = got_tree_entry_get_mode(te);
890 		if (got_object_tree_entry_is_submodule(te)) {
891 			free(modestr);
892 			modestr = strdup("$");
893 			if (modestr == NULL) {
894 				error = got_error_from_errno("strdup");
895 				goto done;
896 			}
897 		} else if (S_ISLNK(mode)) {
898 			free(modestr);
899 			modestr = strdup("@");
900 			if (modestr == NULL) {
901 				error = got_error_from_errno("strdup");
902 				goto done;
903 			}
904 		} else if (S_ISDIR(mode)) {
905 			free(modestr);
906 			modestr = strdup("/");
907 			if (modestr == NULL) {
908 				error = got_error_from_errno("strdup");
909 				goto done;
910 			}
911 		} else if (mode & S_IXUSR) {
912 			free(modestr);
913 			modestr = strdup("*");
914 			if (modestr == NULL) {
915 				error = got_error_from_errno("strdup");
916 				goto done;
917 			}
918 		}
919 
920 		if (class_flip == 0) {
921 			class = strdup("back_lightgray");
922 			if (class == NULL) {
923 				error = got_error_from_errno("strdup");
924 				goto done;
925 			}
926 			class_flip = 1;
927 		} else {
928 			class = strdup("back_white");
929 			if (class == NULL) {
930 				error = got_error_from_errno("strdup");
931 				goto done;
932 			}
933 			class_flip = 0;
934 		}
935 
936 		name = strdup(got_tree_entry_get_name(te));
937 		if (name == NULL) {
938 			error = got_error_from_errno("strdup");
939 			goto done;
940 		}
941 		if (S_ISDIR(mode)) {
942 			if (asprintf(&build_folder, "%s/%s",
943 			    qs->folder ? qs->folder : "",
944 			    got_tree_entry_get_name(te)) == -1) {
945 				error = got_error_from_errno("asprintf");
946 				goto done;
947 			}
948 
949 			if (fcgi_gen_response(c,
950 			    "<div id='tree_wrapper'>\n") == -1)
951 			goto done;
952 
953 			if (fcgi_gen_response(c, "<div id='tree_line' "
954 			    "class='") == -1)
955 				goto done;
956 			if (fcgi_gen_response(c, class) == -1)
957 				goto done;
958 			if (fcgi_gen_response(c, "'>") == -1)
959 				goto done;
960 
961 			if (fcgi_gen_response(c, "<a class='diff_directory' "
962 			    "href='?index_page=") == -1)
963 				goto done;
964 			if (fcgi_gen_response(c, qs->index_page_str) == -1)
965 				goto done;
966 			if (fcgi_gen_response(c, "&path=") == -1)
967 				goto done;
968 			if (fcgi_gen_response(c, qs->path) == -1)
969 				goto done;
970 			if (fcgi_gen_response(c, "&action=tree") == -1)
971 				goto done;
972 			if (fcgi_gen_response(c, "&commit=") == -1)
973 				goto done;
974 			if (fcgi_gen_response(c, rc->commit_id) == -1)
975 				goto done;
976 			if (fcgi_gen_response(c, "&folder=") == -1)
977 				goto done;
978 			if (fcgi_gen_response(c, build_folder) == -1)
979 				goto done;
980 			if (fcgi_gen_response(c, "'>") == -1)
981 				goto done;
982 			if (fcgi_gen_response(c, name) == -1)
983 				goto done;
984 			if (fcgi_gen_response(c, modestr) == -1)
985 				goto done;
986 			if (fcgi_gen_response(c, "</a>") == -1)
987 				goto done;
988 
989 			if (fcgi_gen_response(c, "</div>\n") == -1)
990 				goto done;
991 
992 			if (fcgi_gen_response(c, "<div id='tree_line_blank' "
993 			    "class='") == -1)
994 				goto done;
995 			if (fcgi_gen_response(c, class) == -1)
996 				goto done;
997 			if (fcgi_gen_response(c, "'>") == -1)
998 				goto done;
999 			if (fcgi_gen_response(c, "&nbsp;") == -1)
1000 				goto done;
1001 			if (fcgi_gen_response(c, "</div>\n") == -1)
1002 				goto done;
1003 
1004 			if (fcgi_gen_response(c, "</div>\n") == -1)
1005 				goto done;
1006 
1007 		} else {
1008 			free(name);
1009 			name = strdup(got_tree_entry_get_name(te));
1010 			if (name == NULL) {
1011 				error = got_error_from_errno("strdup");
1012 				goto done;
1013 			}
1014 
1015 			if (fcgi_gen_response(c,
1016 			    "<div id='tree_wrapper'>\n") == -1)
1017 				goto done;
1018 			if (fcgi_gen_response(c, "<div id='tree_line' "
1019 			    "class='") == -1)
1020 				goto done;
1021 			if (fcgi_gen_response(c, class) == -1)
1022 				goto done;
1023 			if (fcgi_gen_response(c, "'>") == -1)
1024 				goto done;
1025 
1026 			if (fcgi_gen_response(c,
1027 			    "<a href='?index_page=") == -1)
1028 				goto done;
1029 
1030 			if (fcgi_gen_response(c, qs->index_page_str) == -1)
1031 				goto done;
1032 
1033 			if (fcgi_gen_response(c, "&path=") == -1)
1034 				goto done;
1035 			if (fcgi_gen_response(c, qs->path) == -1)
1036 				goto done;
1037 
1038 			if (fcgi_gen_response(c, "&action=blob") == -1)
1039 				goto done;
1040 
1041 			if (fcgi_gen_response(c, "&commit=") == -1)
1042 				goto done;
1043 			if (fcgi_gen_response(c, rc->commit_id) == -1)
1044 				goto done;
1045 
1046 			if (fcgi_gen_response(c, "&folder=") == -1)
1047 				goto done;
1048 			if (fcgi_gen_response(c, qs->folder) == -1)
1049 				goto done;
1050 
1051 			if (fcgi_gen_response(c, "&file=") == -1)
1052 				goto done;
1053 			if (fcgi_gen_response(c, name) == -1)
1054 				goto done;
1055 
1056 			if (fcgi_gen_response(c, "'>") == -1)
1057 				goto done;
1058 			if (fcgi_gen_response(c, name) == -1)
1059 				goto done;
1060 			if (fcgi_gen_response(c, modestr) == -1)
1061 				goto done;
1062 
1063 			if (fcgi_gen_response(c, "</a>") == -1)
1064 				goto done;
1065 
1066 			if (fcgi_gen_response(c, "</div>\n") == -1)
1067 				goto done;
1068 
1069 			if (fcgi_gen_response(c, "<div id='tree_line_blank' "
1070 			    "class='") == -1)
1071 				goto done;
1072 			if (fcgi_gen_response(c, class) == -1)
1073 				goto done;
1074 			if (fcgi_gen_response(c, "'>") == -1)
1075 				goto done;
1076 
1077 			if (fcgi_gen_response(c,
1078 			    "<a href='?index_page=") == -1)
1079 				goto done;
1080 
1081 			if (fcgi_gen_response(c, qs->index_page_str) == -1)
1082 				goto done;
1083 
1084 			if (fcgi_gen_response(c, "&path=") == -1)
1085 				goto done;
1086 			if (fcgi_gen_response(c, qs->path) == -1)
1087 				goto done;
1088 
1089 			if (fcgi_gen_response(c, "&action=commits") == -1)
1090 				goto done;
1091 
1092 			if (fcgi_gen_response(c, "&commit=") == -1)
1093 				goto done;
1094 			if (fcgi_gen_response(c, rc->commit_id) == -1)
1095 				goto done;
1096 
1097 			if (fcgi_gen_response(c, "&folder=") == -1)
1098 				goto done;
1099 			if (fcgi_gen_response(c, qs->folder) == -1)
1100 				goto done;
1101 
1102 			if (fcgi_gen_response(c, "&file=") == -1)
1103 				goto done;
1104 			if (fcgi_gen_response(c, name) == -1)
1105 				goto done;
1106 
1107 			if (fcgi_gen_response(c, "'>") == -1)
1108 				goto done;
1109 
1110 			if (fcgi_gen_response(c, "commits") == -1)
1111 				goto done;
1112 			if (fcgi_gen_response(c, "</a>\n") == -1)
1113 				goto done;
1114 
1115 			if (fcgi_gen_response(c, " | \n") == -1)
1116 				goto done;
1117 
1118 			if (fcgi_gen_response(c,
1119 			    "<a href='?index_page=") == -1)
1120 				goto done;
1121 
1122 			if (fcgi_gen_response(c, qs->index_page_str) == -1)
1123 				goto done;
1124 
1125 			if (fcgi_gen_response(c, "&path=") == -1)
1126 				goto done;
1127 			if (fcgi_gen_response(c, qs->path) == -1)
1128 				goto done;
1129 
1130 			if (fcgi_gen_response(c, "&action=blame") == -1)
1131 				goto done;
1132 
1133 			if (fcgi_gen_response(c, "&commit=") == -1)
1134 				goto done;
1135 			if (fcgi_gen_response(c, rc->commit_id) == -1)
1136 				goto done;
1137 
1138 			if (fcgi_gen_response(c, "&folder=") == -1)
1139 				goto done;
1140 			if (fcgi_gen_response(c, qs->folder) == -1)
1141 				goto done;
1142 
1143 			if (fcgi_gen_response(c, "&file=") == -1)
1144 				goto done;
1145 			if (fcgi_gen_response(c, name) == -1)
1146 				goto done;
1147 
1148 			if (fcgi_gen_response(c, "'>") == -1)
1149 				goto done;
1150 
1151 			if (fcgi_gen_response(c, "blame") == -1)
1152 				goto done;
1153 			if (fcgi_gen_response(c, "</a>\n") == -1)
1154 				goto done;
1155 
1156 			if (fcgi_gen_response(c, "</div>\n") == -1)
1157 				goto done;
1158 			if (fcgi_gen_response(c, "</div>\n") == -1)
1159 				goto done;
1160 		}
1161 		free(id_str);
1162 		id_str = NULL;
1163 		free(build_folder);
1164 		build_folder = NULL;
1165 		free(name);
1166 		name = NULL;
1167 		free(modestr);
1168 		modestr = NULL;
1169 		free(class);
1170 		class = NULL;
1171 	}
1172 done:
1173 	free(id_str);
1174 	free(build_folder);
1175 	free(modestr);
1176 	free(path);
1177 	free(name);
1178 	free(class);
1179 	got_ref_list_free(&refs);
1180 	if (commit)
1181 		got_object_commit_close(commit);
1182 	free(commit_id);
1183 	free(tree_id);
1184 	return error;
1185 }
1186 
1187 const struct got_error *
1188 got_output_file_blob(struct request *c)
1189 {
1190 	const struct got_error *error = NULL;
1191 	struct transport *t = c->t;
1192 	struct got_repository *repo = t->repo;
1193 	struct querystring *qs = c->t->qs;
1194 	struct got_commit_object *commit = NULL;
1195 	struct got_object_id *commit_id = NULL;
1196 	struct got_reflist_head refs;
1197 	struct got_blob_object *blob = NULL;
1198 	char *path = NULL, *in_repo_path = NULL;
1199 	int obj_type, set_mime = 0, fd = -1;
1200 	size_t len, hdrlen;
1201 	const uint8_t *buf;
1202 
1203 	TAILQ_INIT(&refs);
1204 
1205 	if (asprintf(&path, "%s%s%s", qs->folder ? qs->folder : "",
1206 	    qs->folder ? "/" : "", qs->file) == -1) {
1207 		error = got_error_from_errno("asprintf");
1208 		goto done;
1209 	}
1210 
1211 	error = got_repo_map_path(&in_repo_path, repo, path);
1212 	if (error)
1213 		goto done;
1214 
1215 	error = got_repo_match_object_id(&commit_id, NULL, qs->commit,
1216 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
1217 	if (error)
1218 		goto done;
1219 
1220 	error = got_object_open_as_commit(&commit, repo, commit_id);
1221 	if (error)
1222 		goto done;
1223 
1224 	error = got_object_id_by_path(&commit_id, repo, commit, in_repo_path);
1225 	if (error)
1226 		goto done;
1227 
1228 	if (commit_id == NULL) {
1229 		error = got_error(GOT_ERR_NO_OBJ);
1230 		goto done;
1231 	}
1232 
1233 	error = got_object_get_type(&obj_type, repo, commit_id);
1234 	if (error)
1235 		goto done;
1236 
1237 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
1238 		error = got_error(GOT_ERR_OBJ_TYPE);
1239 		goto done;
1240 	}
1241 
1242 	error = got_gotweb_dupfd(&c->priv_fd[BLOB_FD_1], &fd);
1243 	if (error)
1244 		goto done;
1245 
1246 	error = got_object_open_as_blob(&blob, repo, commit_id, BUF, fd);
1247 	if (error)
1248 		goto done;
1249 	hdrlen = got_object_blob_get_hdrlen(blob);
1250 	do {
1251 		error = got_object_blob_read_block(&len, blob);
1252 		if (error)
1253 			goto done;
1254 		buf = got_object_blob_get_read_buf(blob);
1255 
1256 		/*
1257 		 * Skip blob object header first time around,
1258 		 * which also contains a zero byte.
1259 		 */
1260 		buf += hdrlen;
1261 		if (set_mime == 0) {
1262 			if (isbinary(buf, len - hdrlen)) {
1263 				error = gotweb_render_content_type_file(c,
1264 				    "application/octet-stream",
1265 				    qs->file);
1266 				if (error) {
1267 					log_warnx("%s: %s", __func__,
1268 					    error->msg);
1269 					goto done;
1270 				}
1271 			} else {
1272 				error = gotweb_render_content_type(c,
1273 				  "text/plain");
1274 				if (error) {
1275 					log_warnx("%s: %s", __func__,
1276 					    error->msg);
1277 					goto done;
1278 				}
1279 			}
1280 		}
1281 		set_mime = 1;
1282 		fcgi_gen_binary_response(c, buf, len - hdrlen);
1283 
1284 		hdrlen = 0;
1285 	} while (len != 0);
1286 done:
1287 	if (commit)
1288 		got_object_commit_close(commit);
1289 	if (fd != -1 && close(fd) == -1 && error == NULL)
1290 		error = got_error_from_errno("close");
1291 	if (blob)
1292 		got_object_blob_close(blob);
1293 	free(in_repo_path);
1294 	free(commit_id);
1295 	free(path);
1296 	return error;
1297 }
1298 
1299 struct blame_line {
1300 	int annotated;
1301 	char *id_str;
1302 	char *committer;
1303 	char datebuf[11]; /* YYYY-MM-DD + NUL */
1304 };
1305 
1306 struct blame_cb_args {
1307 	struct blame_line *lines;
1308 	int nlines;
1309 	int nlines_prec;
1310 	int lineno_cur;
1311 	off_t *line_offsets;
1312 	FILE *f;
1313 	struct got_repository *repo;
1314 	struct request *c;
1315 };
1316 
1317 static const struct got_error *
1318 got_gotweb_blame_cb(void *arg, int nlines, int lineno,
1319     struct got_commit_object *commit, struct got_object_id *id)
1320 {
1321 	const struct got_error *err = NULL;
1322 	struct blame_cb_args *a = arg;
1323 	struct blame_line *bline;
1324 	struct request *c = a->c;
1325 	struct transport *t = c->t;
1326 	struct querystring *qs = t->qs;
1327 	struct repo_dir *repo_dir = t->repo_dir;
1328 	char *line = NULL, *eline = NULL;
1329 	size_t linesize = 0;
1330 	off_t offset;
1331 	struct tm tm;
1332 	time_t committer_time;
1333 
1334 	if (nlines != a->nlines ||
1335 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
1336 		return got_error(GOT_ERR_RANGE);
1337 
1338 	if (lineno == -1)
1339 		return NULL; /* no change in this commit */
1340 
1341 	/* Annotate this line. */
1342 	bline = &a->lines[lineno - 1];
1343 	if (bline->annotated)
1344 		return NULL;
1345 	err = got_object_id_str(&bline->id_str, id);
1346 	if (err)
1347 		return err;
1348 
1349 	bline->committer = strdup(got_object_commit_get_committer(commit));
1350 	if (bline->committer == NULL) {
1351 		err = got_error_from_errno("strdup");
1352 		goto done;
1353 	}
1354 
1355 	committer_time = got_object_commit_get_committer_time(commit);
1356 	if (gmtime_r(&committer_time, &tm) == NULL)
1357 		return got_error_from_errno("gmtime_r");
1358 	if (strftime(bline->datebuf, sizeof(bline->datebuf), "%G-%m-%d",
1359 	    &tm) == 0) {
1360 		err = got_error(GOT_ERR_NO_SPACE);
1361 		goto done;
1362 	}
1363 	bline->annotated = 1;
1364 
1365 	/* Print lines annotated so far. */
1366 	bline = &a->lines[a->lineno_cur - 1];
1367 	if (!bline->annotated)
1368 		goto done;
1369 
1370 	offset = a->line_offsets[a->lineno_cur - 1];
1371 	if (fseeko(a->f, offset, SEEK_SET) == -1) {
1372 		err = got_error_from_errno("fseeko");
1373 		goto done;
1374 	}
1375 
1376 	while (bline->annotated) {
1377 		int out_buff_size = 100;
1378 		char *smallerthan, *at, *nl, *committer;
1379 		char out_buff[out_buff_size];
1380 		size_t len;
1381 
1382 		if (getline(&line, &linesize, a->f) == -1) {
1383 			if (ferror(a->f))
1384 				err = got_error_from_errno("getline");
1385 			break;
1386 		}
1387 
1388 		committer = bline->committer;
1389 		smallerthan = strchr(committer, '<');
1390 		if (smallerthan && smallerthan[1] != '\0')
1391 			committer = smallerthan + 1;
1392 		at = strchr(committer, '@');
1393 		if (at)
1394 			*at = '\0';
1395 		len = strlen(committer);
1396 		if (len >= 9)
1397 			committer[8] = '\0';
1398 
1399 		nl = strchr(line, '\n');
1400 		if (nl)
1401 			*nl = '\0';
1402 
1403 		if (fcgi_gen_response(c, "<div id='blame_wrapper'>") == -1)
1404 			goto done;
1405 		if (fcgi_gen_response(c, "<div id='blame_number'>") == -1)
1406 			goto done;
1407 		if (snprintf(out_buff, strlen(out_buff), "%.*d", a->nlines_prec,
1408 		    a->lineno_cur) < 0)
1409 			goto done;
1410 		if (fcgi_gen_response(c, out_buff) == -1)
1411 			goto done;
1412 		if (fcgi_gen_response(c, "</div>") == -1)
1413 			goto done;
1414 
1415 		if (fcgi_gen_response(c, "<div id='blame_hash'>") == -1)
1416 			goto done;
1417 
1418 		if (fcgi_gen_response(c, "<a href='?index_page=") == -1)
1419 			goto done;
1420 		if (fcgi_gen_response(c, qs->index_page_str) == -1)
1421 			goto done;
1422 		if (fcgi_gen_response(c, "&path=") == -1)
1423 			goto done;
1424 		if (fcgi_gen_response(c, repo_dir->name) == -1)
1425 			goto done;
1426 		if (fcgi_gen_response(c, "&action=diff&commit=") == -1)
1427 			goto done;
1428 		if (fcgi_gen_response(c, bline->id_str) == -1)
1429 			goto done;
1430 		if (fcgi_gen_response(c, "'>") == -1)
1431 			goto done;
1432 		if (snprintf(out_buff, 10, "%.8s", bline->id_str) < 0)
1433 			goto done;
1434 		if (fcgi_gen_response(c, out_buff) == -1)
1435 			goto done;
1436 		if (fcgi_gen_response(c, "</a></div>") == -1)
1437 			goto done;
1438 
1439 		if (fcgi_gen_response(c, "<div id='blame_date'>") == -1)
1440 			goto done;
1441 		if (fcgi_gen_response(c, bline->datebuf) == -1)
1442 			goto done;
1443 		if (fcgi_gen_response(c, "</div>") == -1)
1444 			goto done;
1445 
1446 		if (fcgi_gen_response(c, "<div id='blame_author'>") == -1)
1447 			goto done;
1448 		if (fcgi_gen_response(c, committer) == -1)
1449 			goto done;
1450 		if (fcgi_gen_response(c, "</div>") == -1)
1451 			goto done;
1452 
1453 		if (fcgi_gen_response(c, "<div id='blame_code'>") == -1)
1454 			goto done;
1455 		err = gotweb_escape_html(&eline, line);
1456 		if (err)
1457 			goto done;
1458 		if (fcgi_gen_response(c, eline) == -1)
1459 			goto done;
1460 		if (fcgi_gen_response(c, "</div>") == -1)
1461 			goto done;
1462 
1463 		if (fcgi_gen_response(c, "</div>") == -1)
1464 			goto done;
1465 		a->lineno_cur++;
1466 		bline = &a->lines[a->lineno_cur - 1];
1467 	}
1468 done:
1469 	free(line);
1470 	free(eline);
1471 	return err;
1472 }
1473 
1474 const struct got_error *
1475 got_output_file_blame(struct request *c)
1476 {
1477 	const struct got_error *error = NULL;
1478 	struct transport *t = c->t;
1479 	struct got_repository *repo = t->repo;
1480 	struct querystring *qs = c->t->qs;
1481 	struct got_object_id *obj_id = NULL, *commit_id = NULL;
1482 	struct got_commit_object *commit = NULL;
1483 	struct got_reflist_head refs;
1484 	struct got_blob_object *blob = NULL;
1485 	char *path = NULL, *in_repo_path = NULL;
1486 	struct blame_cb_args bca;
1487 	int i, obj_type, fd1 = -1, fd2 = -1, fd3 = -1, fd4 = -1, fd5 = -1;
1488 	int fd6 = -1;
1489 	off_t filesize;
1490 	FILE *f1 = NULL, *f2 = NULL;
1491 
1492 	TAILQ_INIT(&refs);
1493 	bca.f = NULL;
1494 	bca.lines = NULL;
1495 
1496 	if (asprintf(&path, "%s%s%s", qs->folder ? qs->folder : "",
1497 	    qs->folder ? "/" : "", qs->file) == -1) {
1498 		error = got_error_from_errno("asprintf");
1499 		goto done;
1500 	}
1501 
1502 	error = got_repo_map_path(&in_repo_path, repo, path);
1503 	if (error)
1504 		goto done;
1505 
1506 	error = got_repo_match_object_id(&commit_id, NULL, qs->commit,
1507 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
1508 	if (error)
1509 		goto done;
1510 
1511 	error = got_object_open_as_commit(&commit, repo, commit_id);
1512 	if (error)
1513 		goto done;
1514 
1515 	error = got_object_id_by_path(&obj_id, repo, commit, in_repo_path);
1516 	if (error)
1517 		goto done;
1518 
1519 	if (commit_id == NULL) {
1520 		error = got_error(GOT_ERR_NO_OBJ);
1521 		goto done;
1522 	}
1523 
1524 	error = got_object_get_type(&obj_type, repo, obj_id);
1525 	if (error)
1526 		goto done;
1527 
1528 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
1529 		error = got_error(GOT_ERR_OBJ_TYPE);
1530 		goto done;
1531 	}
1532 
1533 	error = got_gotweb_openfile(&bca.f, &c->priv_fd[BLAME_FD_1], &fd1);
1534 	if (error)
1535 		goto done;
1536 
1537 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_2], &fd2);
1538 	if (error)
1539 		goto done;
1540 
1541 	error = got_object_open_as_blob(&blob, repo, obj_id, BUF, fd2);
1542 	if (error)
1543 		goto done;
1544 
1545 	error = got_object_blob_dump_to_file(&filesize, &bca.nlines,
1546 	    &bca.line_offsets, bca.f, blob);
1547 	if (error || bca.nlines == 0)
1548 		goto done;
1549 
1550 	/* Don't include \n at EOF in the blame line count. */
1551 	if (bca.line_offsets[bca.nlines - 1] == filesize)
1552 		bca.nlines--;
1553 
1554 	bca.lines = calloc(bca.nlines, sizeof(*bca.lines));
1555 	if (bca.lines == NULL) {
1556 		error = got_error_from_errno("calloc");
1557 		goto done;
1558 	}
1559 	bca.lineno_cur = 1;
1560 	bca.nlines_prec = 0;
1561 	i = bca.nlines;
1562 	while (i > 0) {
1563 		i /= 10;
1564 		bca.nlines_prec++;
1565 	}
1566 	bca.repo = repo;
1567 	bca.c = c;
1568 
1569 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_3], &fd3);
1570 	if (error)
1571 		goto done;
1572 
1573 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_4], &fd4);
1574 	if (error)
1575 		goto done;
1576 
1577 	error = got_gotweb_openfile(&f1, &c->priv_fd[BLAME_FD_5], &fd5);
1578 	if (error)
1579 		goto done;
1580 
1581 	error = got_gotweb_openfile(&f2, &c->priv_fd[BLAME_FD_6], &fd6);
1582 	if (error)
1583 		goto done;
1584 
1585 	error = got_blame(in_repo_path, commit_id, repo,
1586 	    GOT_DIFF_ALGORITHM_MYERS, got_gotweb_blame_cb, &bca, NULL, NULL,
1587 	    fd3, fd4, f1, f2);
1588 
1589 	if (blob) {
1590 		free(bca.line_offsets);
1591 		for (i = 0; i < bca.nlines; i++) {
1592 			struct blame_line *bline = &bca.lines[i];
1593 			free(bline->id_str);
1594 			free(bline->committer);
1595 		}
1596 	}
1597 done:
1598 	free(bca.lines);
1599 	if (fd2 != -1 && close(fd2) == -1 && error == NULL)
1600 		error = got_error_from_errno("close");
1601 	if (fd3 != -1 && close(fd3) == -1 && error == NULL)
1602 		error = got_error_from_errno("close");
1603 	if (fd4 != -1 && close(fd4) == -1 && error == NULL)
1604 		error = got_error_from_errno("close");
1605 	if (bca.f) {
1606 		const struct got_error *bca_err =
1607 		    got_gotweb_flushfile(bca.f, fd1);
1608 		if (error == NULL)
1609 			error = bca_err;
1610 	}
1611 	if (f1) {
1612 		const struct got_error *f1_err =
1613 		    got_gotweb_flushfile(f1, fd5);
1614 		if (error == NULL)
1615 			error = f1_err;
1616 	}
1617 	if (f2) {
1618 		const struct got_error *f2_err =
1619 		    got_gotweb_flushfile(f2, fd6);
1620 		if (error == NULL)
1621 			error = f2_err;
1622 	}
1623 	if (commit)
1624 		got_object_commit_close(commit);
1625 	if (blob)
1626 		got_object_blob_close(blob);
1627 	free(in_repo_path);
1628 	free(commit_id);
1629 	free(path);
1630 	return error;
1631 }
1632 
1633 const struct got_error *
1634 got_output_repo_diff(struct request *c)
1635 {
1636 	const struct got_error *error = NULL;
1637 	struct transport *t = c->t;
1638 	struct got_repository *repo = t->repo;
1639 	struct repo_commit *rc = NULL;
1640 	struct got_object_id *id1 = NULL, *id2 = NULL;
1641 	struct got_reflist_head refs;
1642 	FILE *f1 = NULL, *f2 = NULL, *f3 = NULL;
1643 	char *label1 = NULL, *label2 = NULL, *line = NULL;
1644 	char *newline, *eline = NULL, *color = NULL;
1645 	int obj_type, fd1, fd2, fd3, fd4 = -1, fd5 = -1;
1646 	size_t linesize = 0;
1647 	ssize_t linelen;
1648 	int wrlen = 0;
1649 
1650 	TAILQ_INIT(&refs);
1651 
1652 	error = got_gotweb_openfile(&f1, &c->priv_fd[DIFF_FD_1], &fd1);
1653 	if (error)
1654 		return error;
1655 
1656 	error = got_gotweb_openfile(&f2, &c->priv_fd[DIFF_FD_2], &fd2);
1657 	if (error)
1658 		return error;
1659 
1660 	error = got_gotweb_openfile(&f3, &c->priv_fd[DIFF_FD_3], &fd3);
1661 	if (error)
1662 		return error;
1663 
1664 	rc = TAILQ_FIRST(&t->repo_commits);
1665 
1666 	if (rc->parent_id != NULL &&
1667 	    strncmp(rc->parent_id, "/dev/null", 9) != 0) {
1668 		error = got_repo_match_object_id(&id1, &label1,
1669 		    rc->parent_id, GOT_OBJ_TYPE_ANY,
1670 		    &refs, repo);
1671 		if (error)
1672 			goto done;
1673 	}
1674 
1675 	error = got_repo_match_object_id(&id2, &label2, rc->commit_id,
1676 	    GOT_OBJ_TYPE_ANY, &refs, repo);
1677 	if (error)
1678 		goto done;
1679 
1680 	error = got_object_get_type(&obj_type, repo, id2);
1681 	if (error)
1682 		goto done;
1683 
1684 	error = got_gotweb_dupfd(&c->priv_fd[DIFF_FD_4], &fd4);
1685 	if (error)
1686 		goto done;
1687 
1688 	error = got_gotweb_dupfd(&c->priv_fd[DIFF_FD_5], &fd5);
1689 	if (error)
1690 		goto done;
1691 
1692 	switch (obj_type) {
1693 	case GOT_OBJ_TYPE_BLOB:
1694 		error = got_diff_objects_as_blobs(NULL, NULL, f1, f2, fd4, fd5,
1695 		     id1, id2, NULL, NULL, GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1696 		     repo, f3);
1697 		break;
1698 	case GOT_OBJ_TYPE_TREE:
1699 		error = got_diff_objects_as_trees(NULL, NULL, f1, f2, fd4, fd5,
1700 		    id1, id2, NULL, "", "",  GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1701 		    repo, f3);
1702 		break;
1703 	case GOT_OBJ_TYPE_COMMIT:
1704 		error = got_diff_objects_as_commits(NULL, NULL, f1, f2, fd4,
1705 		    fd5, id1, id2, NULL,  GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1706 		    repo, f3);
1707 		break;
1708 	default:
1709 		error = got_error(GOT_ERR_OBJ_TYPE);
1710 	}
1711 	if (error)
1712 		goto done;
1713 
1714 	if (fseek(f1, 0, SEEK_SET) == -1) {
1715 		error = got_ferror(f1, GOT_ERR_IO);
1716 		goto done;
1717 	}
1718 
1719 	if (fseek(f2, 0, SEEK_SET) == -1) {
1720 		error = got_ferror(f2, GOT_ERR_IO);
1721 		goto done;
1722 	}
1723 
1724 	if (fseek(f3, 0, SEEK_SET) == -1) {
1725 		error = got_ferror(f3, GOT_ERR_IO);
1726 		goto done;
1727 	}
1728 
1729 	while ((linelen = getline(&line, &linesize, f3)) != -1) {
1730 		if (strncmp(line, "-", 1) == 0) {
1731 			color = strdup("diff_minus");
1732 			if (color == NULL) {
1733 				error = got_error_from_errno("strdup");
1734 				goto done;
1735 			}
1736 		} else if (strncmp(line, "+", 1) == 0) {
1737 			color = strdup("diff_plus");
1738 			if (color == NULL) {
1739 				error = got_error_from_errno("strdup");
1740 				goto done;
1741 			}
1742 		} else if (strncmp(line, "@@", 2) == 0) {
1743 			color = strdup("diff_chunk_header");
1744 			if (color == NULL) {
1745 				error = got_error_from_errno("strdup");
1746 				goto done;
1747 			}
1748 		} else if (strncmp(line, "@@", 2) == 0) {
1749 			color = strdup("diff_chunk_header");
1750 			if (color == NULL) {
1751 				error = got_error_from_errno("strdup");
1752 				goto done;
1753 			}
1754 		} else if (strncmp(line, "commit +", 8) == 0) {
1755 			color = strdup("diff_meta");
1756 			if (color == NULL) {
1757 				error = got_error_from_errno("strdup");
1758 				goto done;
1759 			}
1760 		} else if (strncmp(line, "commit -", 8) == 0) {
1761 			color = strdup("diff_meta");
1762 			if (color == NULL) {
1763 				error = got_error_from_errno("strdup");
1764 				goto done;
1765 			}
1766 		} else if (strncmp(line, "blob +", 6) == 0) {
1767 			color = strdup("diff_meta");
1768 			if (color == NULL) {
1769 				error = got_error_from_errno("strdup");
1770 				goto done;
1771 			}
1772 		} else if (strncmp(line, "blob -", 6) == 0) {
1773 			color = strdup("diff_meta");
1774 			if (color == NULL) {
1775 				error = got_error_from_errno("strdup");
1776 				goto done;
1777 			}
1778 		} else if (strncmp(line, "file +", 6) == 0) {
1779 			color = strdup("diff_meta");
1780 			if (color == NULL) {
1781 				error = got_error_from_errno("strdup");
1782 				goto done;
1783 			}
1784 		} else if (strncmp(line, "file -", 6) == 0) {
1785 			color = strdup("diff_meta");
1786 			if (color == NULL) {
1787 				error = got_error_from_errno("strdup");
1788 				goto done;
1789 			}
1790 		} else if (strncmp(line, "from:", 5) == 0) {
1791 			color = strdup("diff_author");
1792 			if (color == NULL) {
1793 				error = got_error_from_errno("strdup");
1794 				goto done;
1795 			}
1796 		} else if (strncmp(line, "via:", 4) == 0) {
1797 			color = strdup("diff_author");
1798 			if (color == NULL) {
1799 				error = got_error_from_errno("strdup");
1800 				goto done;
1801 			}
1802 		} else if (strncmp(line, "date:", 5) == 0) {
1803 			color = strdup("diff_date");
1804 			if (color == NULL) {
1805 				error = got_error_from_errno("strdup");
1806 				goto done;
1807 			}
1808 		}
1809 		if (fcgi_gen_response(c, "<div id='diff_line' class='") == -1)
1810 			goto done;
1811 		if (fcgi_gen_response(c, color ? color : "") == -1)
1812 			goto done;
1813 		if (fcgi_gen_response(c, "'>") == -1)
1814 			goto done;
1815 		newline = strchr(line, '\n');
1816 		if (newline)
1817 			*newline = '\0';
1818 
1819 		error = gotweb_escape_html(&eline, line);
1820 		if (error)
1821 			goto done;
1822 		if (fcgi_gen_response(c, eline) == -1)
1823 			goto done;
1824 		free(eline);
1825 		eline = NULL;
1826 
1827 		if (fcgi_gen_response(c, "</div>\n") == -1)
1828 			goto done;
1829 		if (linelen > 0)
1830 			wrlen = wrlen + linelen;
1831 		free(color);
1832 		color = NULL;
1833 	}
1834 	if (linelen == -1 && ferror(f3))
1835 		error = got_error_from_errno("getline");
1836 done:
1837 	free(color);
1838 	if (fd4 != -1 && close(fd4) == -1 && error == NULL)
1839 		error = got_error_from_errno("close");
1840 	if (fd5 != -1 && close(fd5) == -1 && error == NULL)
1841 		error = got_error_from_errno("close");
1842 	if (f1) {
1843 		const struct got_error *f1_err =
1844 		    got_gotweb_flushfile(f1, fd1);
1845 		if (error == NULL)
1846 			error = f1_err;
1847 	}
1848 	if (f2) {
1849 		const struct got_error *f2_err =
1850 		    got_gotweb_flushfile(f2, fd2);
1851 		if (error == NULL)
1852 			error = f2_err;
1853 	}
1854 	if (f3) {
1855 		const struct got_error *f3_err =
1856 		    got_gotweb_flushfile(f3, fd3);
1857 		if (error == NULL)
1858 			error = f3_err;
1859 	}
1860 	got_ref_list_free(&refs);
1861 	free(line);
1862 	free(eline);
1863 	free(label1);
1864 	free(label2);
1865 	free(id1);
1866 	free(id2);
1867 	return error;
1868 }
1869 
1870 static const struct got_error *
1871 got_init_repo_commit(struct repo_commit **rc)
1872 {
1873 	const struct got_error *error = NULL;
1874 
1875 	*rc = calloc(1, sizeof(**rc));
1876 	if (*rc == NULL)
1877 		return got_error_from_errno2("%s: calloc", __func__);
1878 
1879 	(*rc)->path = NULL;
1880 	(*rc)->refs_str = NULL;
1881 	(*rc)->commit_id = NULL;
1882 	(*rc)->committer = NULL;
1883 	(*rc)->author = NULL;
1884 	(*rc)->parent_id = NULL;
1885 	(*rc)->tree_id = NULL;
1886 	(*rc)->commit_msg = NULL;
1887 
1888 	return error;
1889 }
1890 
1891 static const struct got_error *
1892 got_init_repo_tag(struct repo_tag **rt)
1893 {
1894 	const struct got_error *error = NULL;
1895 
1896 	*rt = calloc(1, sizeof(**rt));
1897 	if (*rt == NULL)
1898 		return got_error_from_errno2("%s: calloc", __func__);
1899 
1900 	(*rt)->commit_id = NULL;
1901 	(*rt)->tag_name = NULL;
1902 	(*rt)->tag_commit = NULL;
1903 	(*rt)->commit_msg = NULL;
1904 	(*rt)->tagger = NULL;
1905 
1906 	return error;
1907 }