1 /*
2  * Copyright (c) 2022 Omar Polo <op@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  *
16  * Apply patches.
17  *
18  * Things that we may want to support:
19  *     + support indented patches?
20  *     + support other kinds of patches?
21  */
22 
23 #include <sys/types.h>
24 #include <sys/socket.h>
25 #include <sys/stat.h>
26 #include <sys/uio.h>
27 
28 #include <errno.h>
29 #include <limits.h>
30 #include <stdint.h>
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <unistd.h>
35 
36 #include "got_error.h"
37 #include "got_object.h"
38 #include "got_path.h"
39 #include "got_reference.h"
40 #include "got_cancel.h"
41 #include "got_worktree.h"
42 #include "got_opentemp.h"
43 #include "got_patch.h"
44 
45 #include "got_lib_delta.h"
46 #include "got_lib_object.h"
47 #include "got_lib_privsep.h"
48 
49 #define MIN(a, b) ((a) < (b) ? (a) : (b))
50 
51 struct got_patch_hunk {
52 	STAILQ_ENTRY(got_patch_hunk) entries;
53 	const struct got_error *err;
54 	long	offset;
55 	int	nonl;
56 	long	old_from;
57 	long	old_lines;
58 	long	new_from;
59 	long	new_lines;
60 	size_t	len;
61 	size_t	cap;
62 	char	**lines;
63 };
64 
65 STAILQ_HEAD(got_patch_hunk_head, got_patch_hunk);
66 struct got_patch {
67 	char	*old;
68 	char	*new;
69 	struct got_patch_hunk_head head;
70 };
71 
72 struct patch_args {
73 	got_patch_progress_cb progress_cb;
74 	void	*progress_arg;
75 	struct got_patch_hunk_head *head;
76 };
77 
78 static const struct got_error *
79 send_patch(struct imsgbuf *ibuf, int fd)
80 {
81 	const struct got_error *err = NULL;
82 
83 	if (imsg_compose(ibuf, GOT_IMSG_PATCH_FILE, 0, 0, fd,
84 	    NULL, 0) == -1) {
85 		err = got_error_from_errno(
86 		    "imsg_compose GOT_IMSG_PATCH_FILE");
87 		close(fd);
88 		return err;
89 	}
90 
91 	if (imsg_flush(ibuf) == -1) {
92 		err = got_error_from_errno("imsg_flush");
93 		imsg_clear(ibuf);
94 	}
95 
96 	return err;
97 }
98 
99 static void
100 patch_free(struct got_patch *p)
101 {
102 	struct got_patch_hunk *h;
103 	size_t i;
104 
105 	while (!STAILQ_EMPTY(&p->head)) {
106 		h = STAILQ_FIRST(&p->head);
107 		STAILQ_REMOVE_HEAD(&p->head, entries);
108 
109 		for (i = 0; i < h->len; ++i)
110 			free(h->lines[i]);
111 		free(h->lines);
112 		free(h);
113 	}
114 
115 	free(p->new);
116 	free(p->old);
117 }
118 
119 static const struct got_error *
120 pushline(struct got_patch_hunk *h, const char *line)
121 {
122 	void 	*t;
123 	size_t	 newcap;
124 
125 	if (h->len == h->cap) {
126 		if ((newcap = h->cap * 1.5) == 0)
127 			newcap = 16;
128 		t = recallocarray(h->lines, h->cap, newcap,
129 		    sizeof(h->lines[0]));
130 		if (t == NULL)
131 			return got_error_from_errno("recallocarray");
132 		h->lines = t;
133 		h->cap = newcap;
134 	}
135 
136 	if ((t = strdup(line)) == NULL)
137 		return got_error_from_errno("strdup");
138 
139 	h->lines[h->len++] = t;
140 	return NULL;
141 }
142 
143 static const struct got_error *
144 recv_patch(struct imsgbuf *ibuf, int *done, struct got_patch *p)
145 {
146 	const struct got_error *err = NULL;
147 	struct imsg imsg;
148 	struct got_imsg_patch_hunk hdr;
149 	struct got_imsg_patch patch;
150 	struct got_patch_hunk *h = NULL;
151 	size_t datalen;
152 
153 	memset(p, 0, sizeof(*p));
154 	STAILQ_INIT(&p->head);
155 
156 	err = got_privsep_recv_imsg(&imsg, ibuf, 0);
157 	if (err)
158 		return err;
159 	if (imsg.hdr.type == GOT_IMSG_PATCH_EOF) {
160 		*done = 1;
161 		goto done;
162 	}
163 	if (imsg.hdr.type != GOT_IMSG_PATCH) {
164 		err = got_error(GOT_ERR_PRIVSEP_MSG);
165 		goto done;
166 	}
167 	datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
168 	if (datalen != sizeof(patch)) {
169 		err = got_error(GOT_ERR_PRIVSEP_LEN);
170 		goto done;
171 	}
172 	memcpy(&patch, imsg.data, sizeof(patch));
173 	if (*patch.old != '\0' && (p->old = strdup(patch.old)) == NULL) {
174 		err = got_error_from_errno("strdup");
175 		goto done;
176 	}
177 	if (*patch.new != '\0' && (p->new = strdup(patch.new)) == NULL) {
178 		err = got_error_from_errno("strdup");
179 		goto done;
180 	}
181 	if (p->old == NULL && p->new == NULL) {
182 		err = got_error(GOT_ERR_PATCH_MALFORMED);
183 		goto done;
184 	}
185 
186 	imsg_free(&imsg);
187 
188 	for (;;) {
189 		char *t;
190 
191 		err = got_privsep_recv_imsg(&imsg, ibuf, 0);
192 		if (err)
193 			return err;
194 
195 		switch (imsg.hdr.type) {
196 		case GOT_IMSG_PATCH_DONE:
197 			goto done;
198 		case GOT_IMSG_PATCH_HUNK:
199 			if (h != NULL && h->nonl) {
200 				err = got_error(GOT_ERR_PATCH_MALFORMED);
201 				goto done;
202 			}
203 			datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
204 			if (datalen != sizeof(hdr)) {
205 				err = got_error(GOT_ERR_PRIVSEP_LEN);
206 				goto done;
207 			}
208 			memcpy(&hdr, imsg.data, sizeof(hdr));
209 			if ((h = calloc(1, sizeof(*h))) == NULL) {
210 				err = got_error_from_errno("calloc");
211 				goto done;
212 			}
213 			h->old_from = hdr.oldfrom;
214 			h->old_lines = hdr.oldlines;
215 			h->new_from = hdr.newfrom;
216 			h->new_lines = hdr.newlines;
217 			STAILQ_INSERT_TAIL(&p->head, h, entries);
218 			break;
219 		case GOT_IMSG_PATCH_LINE:
220 			if (h == NULL) {
221 				err = got_error(GOT_ERR_PRIVSEP_MSG);
222 				goto done;
223 			}
224 			datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
225 			t = imsg.data;
226 			/* at least one char */
227 			if (datalen < 2 || t[datalen-1] != '\0') {
228 				err = got_error(GOT_ERR_PRIVSEP_MSG);
229 				goto done;
230 			}
231 			if (*t != ' ' && *t != '-' && *t != '+' &&
232 			    *t != '\\') {
233 				err = got_error(GOT_ERR_PRIVSEP_MSG);
234 				goto done;
235 			}
236 			if (h->nonl)
237 				err = got_error(GOT_ERR_PATCH_MALFORMED);
238 			if (*t == '\\')
239 				h->nonl = 1;
240 			else
241 				err = pushline(h, t);
242 			if (err)
243 				goto done;
244 			break;
245 		default:
246 			err = got_error(GOT_ERR_PRIVSEP_MSG);
247 			goto done;
248 		}
249 
250 		imsg_free(&imsg);
251 	}
252 
253 done:
254 	imsg_free(&imsg);
255 	return err;
256 }
257 
258 /*
259  * Copy data from orig starting at copypos until pos into tmp.
260  * If pos is -1, copy until EOF.
261  */
262 static const struct got_error *
263 copy(FILE *tmp, FILE *orig, off_t copypos, off_t pos)
264 {
265 	char buf[BUFSIZ];
266 	size_t len, r, w;
267 
268 	if (fseek(orig, copypos, SEEK_SET) == -1)
269 		return got_error_from_errno("fseek");
270 
271 	while (pos == -1 || copypos < pos) {
272 		len = sizeof(buf);
273 		if (pos > 0)
274 			len = MIN(len, (size_t)pos - copypos);
275 		r = fread(buf, 1, len, orig);
276 		if (r != len && ferror(orig))
277 			return got_error_from_errno("fread");
278 		w = fwrite(buf, 1, r, tmp);
279 		if (w != r)
280 			return got_error_from_errno("fwrite");
281 		copypos += len;
282 		if (r != len && feof(orig)) {
283 			if (pos == -1)
284 				return NULL;
285 			return got_error(GOT_ERR_HUNK_FAILED);
286 		}
287 	}
288 	return NULL;
289 }
290 
291 static const struct got_error *
292 locate_hunk(FILE *orig, struct got_patch_hunk *h, off_t *pos, long *lineno)
293 {
294 	const struct got_error *err = NULL;
295 	char *line = NULL;
296 	char mode = *h->lines[0];
297 	size_t linesize = 0;
298 	ssize_t linelen;
299 	off_t match = -1;
300 	long match_lineno = -1;
301 
302 	for (;;) {
303 		linelen = getline(&line, &linesize, orig);
304 		if (linelen == -1) {
305 			if (ferror(orig))
306 				err = got_error_from_errno("getline");
307 			else if (match == -1)
308 				err = got_error(GOT_ERR_HUNK_FAILED);
309 			break;
310 		}
311 		if (line[linelen - 1] == '\n')
312 			line[linelen - 1] = '\0';
313 		(*lineno)++;
314 
315 		if ((mode == ' ' && !strcmp(h->lines[0] + 1, line)) ||
316 		    (mode == '-' && !strcmp(h->lines[0] + 1, line)) ||
317 		    (mode == '+' && *lineno == h->old_from)) {
318 			match = ftello(orig);
319 			if (match == -1) {
320 				err = got_error_from_errno("ftello");
321 				break;
322 			}
323 			match -= linelen;
324 			match_lineno = (*lineno)-1;
325 		}
326 
327 		if (*lineno >= h->old_from && match != -1)
328 			break;
329 	}
330 
331 	if (err == NULL) {
332 		*pos = match;
333 		*lineno = match_lineno;
334 		if (fseek(orig, match, SEEK_SET) == -1)
335 			err = got_error_from_errno("fseek");
336 	}
337 
338 	free(line);
339 	return err;
340 }
341 
342 static const struct got_error *
343 test_hunk(FILE *orig, struct got_patch_hunk *h)
344 {
345 	const struct got_error *err = NULL;
346 	char *line = NULL;
347 	size_t linesize = 0, i = 0;
348 	ssize_t linelen;
349 
350 	for (i = 0; i < h->len; ++i) {
351 		switch (*h->lines[i]) {
352 		case '+':
353 			continue;
354 		case ' ':
355 		case '-':
356 			linelen = getline(&line, &linesize, orig);
357 			if (linelen == -1) {
358 				if (ferror(orig))
359 					err = got_error_from_errno("getline");
360 				else
361 					err = got_error(
362 					    GOT_ERR_HUNK_FAILED);
363 				goto done;
364 			}
365 			if (line[linelen - 1] == '\n')
366 				line[linelen - 1] = '\0';
367 			if (strcmp(h->lines[i] + 1, line)) {
368 				err = got_error(GOT_ERR_HUNK_FAILED);
369 				goto done;
370 			}
371 			break;
372 		}
373 	}
374 
375 done:
376 	free(line);
377 	return err;
378 }
379 
380 static const struct got_error *
381 apply_hunk(FILE *tmp, struct got_patch_hunk *h, long *lineno)
382 {
383 	size_t i = 0;
384 
385 	for (i = 0; i < h->len; ++i) {
386 		switch (*h->lines[i]) {
387 		case ' ':
388 			if (fprintf(tmp, "%s\n", h->lines[i] + 1) < 0)
389 				return got_error_from_errno("fprintf");
390 			/* fallthrough */
391 		case '-':
392 			(*lineno)++;
393 			break;
394 		case '+':
395 			if (fprintf(tmp, "%s", h->lines[i] + 1) < 0)
396 				return got_error_from_errno("fprintf");
397 			if (i != h->len - 1 || !h->nonl) {
398 				if (fprintf(tmp, "\n") < 0)
399 					return got_error_from_errno(
400 					    "fprintf");
401 			}
402 			break;
403 		}
404 	}
405 	return NULL;
406 }
407 
408 static const struct got_error *
409 patch_file(struct got_patch *p, const char *path, FILE *tmp, int nop,
410     mode_t *mode)
411 {
412 	const struct got_error *err = NULL;
413 	struct got_patch_hunk *h;
414 	struct stat sb;
415 	long lineno = 0;
416 	FILE *orig;
417 	off_t copypos, pos;
418 	char *line = NULL;
419 	size_t linesize = 0;
420 	ssize_t linelen;
421 
422 	if (p->old == NULL) {				/* create */
423 		h = STAILQ_FIRST(&p->head);
424 		if (h == NULL || STAILQ_NEXT(h, entries) != NULL)
425 			return got_error(GOT_ERR_PATCH_MALFORMED);
426 		if (nop)
427 			return NULL;
428 		return apply_hunk(tmp, h, &lineno);
429 	}
430 
431 	if ((orig = fopen(path, "r")) == NULL) {
432 		err = got_error_from_errno2("fopen", path);
433 		goto done;
434 	}
435 
436 	if (fstat(fileno(orig), &sb) == -1) {
437 		err = got_error_from_errno("fstat");
438 		goto done;
439 	}
440 	*mode = sb.st_mode;
441 
442 	copypos = 0;
443 	STAILQ_FOREACH(h, &p->head, entries) {
444 		if (h->lines == NULL)
445 			break;
446 
447 	tryagain:
448 		err = locate_hunk(orig, h, &pos, &lineno);
449 		if (err != NULL && err->code == GOT_ERR_HUNK_FAILED)
450 			h->err = err;
451 		if (err != NULL)
452 			goto done;
453 		if (!nop)
454 			err = copy(tmp, orig, copypos, pos);
455 		if (err != NULL)
456 			goto done;
457 		copypos = pos;
458 
459 		err = test_hunk(orig, h);
460 		if (err != NULL && err->code == GOT_ERR_HUNK_FAILED) {
461 			/*
462 			 * try to apply the hunk again starting the search
463 			 * after the previous partial match.
464 			 */
465 			if (fseek(orig, pos, SEEK_SET) == -1) {
466 				err = got_error_from_errno("fseek");
467 				goto done;
468 			}
469 			linelen = getline(&line, &linesize, orig);
470 			if (linelen == -1) {
471 				err = got_error_from_errno("getline");
472 				goto done;
473 			}
474 			lineno++;
475 			goto tryagain;
476 		}
477 		if (err != NULL)
478 			goto done;
479 
480 		if (lineno + 1 != h->old_from)
481 			h->offset = lineno + 1 - h->old_from;
482 
483 		if (!nop)
484 			err = apply_hunk(tmp, h, &lineno);
485 		if (err != NULL)
486 			goto done;
487 		
488 		copypos = ftello(orig);
489 		if (copypos == -1) {
490 			err = got_error_from_errno("ftello");
491 			goto done;
492 		}
493 	}
494 
495 	if (p->new == NULL && sb.st_size != copypos) {
496 		h = STAILQ_FIRST(&p->head);
497 		h->err = got_error(GOT_ERR_HUNK_FAILED);
498 		err = h->err;
499 	} else if (!nop && !feof(orig))
500 		err = copy(tmp, orig, copypos, -1);
501 
502 done:
503 	if (orig != NULL)
504 		fclose(orig);
505 	return err;
506 }
507 
508 static const struct got_error *
509 report_progress(struct patch_args *pa, const char *old, const char *new,
510     unsigned char status, const struct got_error *orig_error)
511 {
512 	const struct got_error *err;
513 	struct got_patch_hunk *h;
514 
515 	err = pa->progress_cb(pa->progress_arg, old, new, status,
516 	    orig_error, 0, 0, 0, 0, 0, NULL);
517 	if (err)
518 		return err;
519 
520 	STAILQ_FOREACH(h, pa->head, entries) {
521 		if (h->offset == 0 && h->err == NULL)
522 			continue;
523 
524 		err = pa->progress_cb(pa->progress_arg, old, new, 0, NULL,
525 		    h->old_from, h->old_lines, h->new_from, h->new_lines,
526 		    h->offset, h->err);
527 		if (err)
528 			return err;
529 	}
530 
531 	return NULL;
532 }
533 
534 static const struct got_error *
535 patch_delete(void *arg, unsigned char status, unsigned char staged_status,
536     const char *path)
537 {
538 	return report_progress(arg, path, NULL, status, NULL);
539 }
540 
541 static const struct got_error *
542 patch_add(void *arg, unsigned char status, const char *path)
543 {
544 	return report_progress(arg, NULL, path, status, NULL);
545 }
546 
547 static const struct got_error *
548 apply_patch(struct got_worktree *worktree, struct got_repository *repo,
549     const char *oldpath, const char *newpath, struct got_patch *p,
550     int nop, struct patch_args *pa, got_cancel_cb cancel_cb, void *cancel_arg)
551 {
552 	const struct got_error *err = NULL;
553 	struct got_pathlist_head oldpaths, newpaths;
554 	struct got_pathlist_entry *pe;
555 	int file_renamed = 0;
556 	char *tmppath = NULL, *template = NULL, *parent = NULL;;
557 	FILE *tmp = NULL;
558 	mode_t mode = GOT_DEFAULT_FILE_MODE;
559 
560 	TAILQ_INIT(&oldpaths);
561 	TAILQ_INIT(&newpaths);
562 
563 	err = got_pathlist_insert(&pe, &oldpaths, oldpath, NULL);
564 	if (err)
565 		goto done;
566 	err = got_pathlist_insert(&pe, &newpaths, newpath, NULL);
567 	if (err)
568 		goto done;
569 
570 	file_renamed = strcmp(oldpath, newpath);
571 
572 	if (p->old != NULL && p->new == NULL) {
573 		/*
574 		 * special case: delete a file.  don't try to match
575 		 * the lines but just schedule the removal.
576 		 */
577 		err = got_worktree_schedule_delete(worktree, &oldpaths,
578 		    0, NULL, patch_delete, pa, repo, 0, 0);
579 		goto done;
580 	}
581 
582 	if (asprintf(&template, "%s/got-patch",
583 	    got_worktree_get_root_path(worktree)) == -1) {
584 		err = got_error_from_errno(template);
585 		goto done;
586 	}
587 
588 	if (!nop)
589 		err = got_opentemp_named(&tmppath, &tmp, template);
590 	if (err)
591 		goto done;
592 	err = patch_file(p, oldpath, tmp, nop, &mode);
593 	if (err)
594 		goto done;
595 
596 	if (nop)
597 		goto done;
598 
599 	if (p->old != NULL && p->new == NULL) {
600 		err = got_worktree_schedule_delete(worktree, &oldpaths,
601 		    0, NULL, patch_delete, pa, repo, 0, 0);
602 		goto done;
603 	}
604 
605 	if (fchmod(fileno(tmp), mode) == -1) {
606 		err = got_error_from_errno2("chmod", newpath);
607 		goto done;
608 	}
609 
610 	if (rename(tmppath, newpath) == -1) {
611 		if (errno != ENOENT) {
612 			err = got_error_from_errno3("rename", tmppath,
613 			    newpath);
614 			goto done;
615 		}
616 
617 		err = got_path_dirname(&parent, newpath);
618 		if (err != NULL)
619 			goto done;
620 		err = got_path_mkdir(parent);
621 		if (err != NULL)
622 			goto done;
623 		if (rename(tmppath, newpath) == -1) {
624 			err = got_error_from_errno3("rename", tmppath,
625 			    newpath);
626 			goto done;
627 		}
628 	}
629 
630 	if (file_renamed) {
631 		err = got_worktree_schedule_delete(worktree, &oldpaths,
632 		    0, NULL, patch_delete, pa, repo, 0, 0);
633 		if (err == NULL)
634 			err = got_worktree_schedule_add(worktree, &newpaths,
635 			    patch_add, pa, repo, 1);
636 		if (err)
637 			unlink(newpath);
638 	} else if (p->old == NULL) {
639 		err = got_worktree_schedule_add(worktree, &newpaths,
640 		    patch_add, pa, repo, 1);
641 		if (err)
642 			unlink(newpath);
643 	} else
644 		err = report_progress(pa, oldpath, newpath, GOT_STATUS_MODIFY,
645 		    NULL);
646 
647 done:
648 	got_pathlist_free(&oldpaths);
649 	got_pathlist_free(&newpaths);
650 	free(parent);
651 	free(template);
652 	if (tmppath != NULL)
653 		unlink(tmppath);
654 	free(tmppath);
655 	return err;
656 }
657 
658 const struct got_error *
659 got_patch(int fd, struct got_worktree *worktree, struct got_repository *repo,
660     int nop, got_patch_progress_cb progress_cb, void *progress_arg,
661     got_cancel_cb cancel_cb, void *cancel_arg)
662 {
663 	const struct got_error *err = NULL;
664 	struct got_fileindex *fileindex = NULL;
665 	char *oldpath, *newpath;
666 	struct imsgbuf *ibuf;
667 	int imsg_fds[2] = {-1, -1};
668 	int done = 0, failed = 0;
669 	pid_t pid;
670 
671 	ibuf = calloc(1, sizeof(*ibuf));
672 	if (ibuf == NULL) {
673 		err = got_error_from_errno("calloc");
674 		goto done;
675 	}
676 
677 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {
678 		err = got_error_from_errno("socketpair");
679 		goto done;
680 	}
681 
682 	pid = fork();
683 	if (pid == -1) {
684 		err = got_error_from_errno("fork");
685 		goto done;
686 	} else if (pid == 0) {
687 		got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_PATCH,
688 		    NULL);
689 		/* not reached */
690 	}
691 
692 	if (close(imsg_fds[1]) == -1) {
693 		err = got_error_from_errno("close");
694 		goto done;
695 	}
696 	imsg_fds[1] = -1;
697 	imsg_init(ibuf, imsg_fds[0]);
698 
699 	err = send_patch(ibuf, fd);
700 	fd = -1;
701 	if (err)
702 		goto done;
703 
704 	err = got_worktree_patch_prepare(&fileindex, worktree);
705 	if (err)
706 		goto done;
707 
708 	while (!done && err == NULL) {
709 		struct got_patch p;
710 		struct patch_args pa;
711 
712 		pa.progress_cb = progress_cb;
713 		pa.progress_arg = progress_arg;
714 		pa.head = &p.head;
715 
716 		err = recv_patch(ibuf, &done, &p);
717 		if (err || done)
718 			break;
719 
720 		err = got_worktree_patch_check_path(p.old, p.new, &oldpath,
721 		    &newpath, worktree, repo, fileindex);
722 		if (err == NULL)
723 			err = apply_patch(worktree, repo, oldpath, newpath,
724 			    &p, nop, &pa, cancel_cb, cancel_arg);
725 		if (err != NULL) {
726 			failed = 1;
727 			/* recoverable errors */
728 			if (err->code == GOT_ERR_FILE_STATUS ||
729 			    (err->code == GOT_ERR_ERRNO && errno == ENOENT))
730 				err = report_progress(&pa, p.old, p.new,
731 				    GOT_STATUS_CANNOT_UPDATE, err);
732 			else if (err->code == GOT_ERR_HUNK_FAILED)
733 				err = report_progress(&pa, p.old, p.new,
734 				    GOT_STATUS_CANNOT_UPDATE, NULL);
735 		}
736 
737 		free(oldpath);
738 		free(newpath);
739 		patch_free(&p);
740 
741 		if (err)
742 			break;
743 	}
744 
745 done:
746 	if (fileindex)
747 		got_worktree_patch_complete(fileindex);
748 	if (fd != -1 && close(fd) == -1 && err == NULL)
749 		err = got_error_from_errno("close");
750 	if (ibuf != NULL)
751 		imsg_clear(ibuf);
752 	if (imsg_fds[0] != -1 && close(imsg_fds[0]) == -1 && err == NULL)
753 		err = got_error_from_errno("close");
754 	if (imsg_fds[1] != -1 && close(imsg_fds[1]) == -1 && err == NULL)
755 		err = got_error_from_errno("close");
756 	if (err == NULL && failed)
757 		err = got_error(GOT_ERR_PATCH_FAILED);
758 	return err;
759 }