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, int strip)
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 
174 	/* automatically set strip=1 for git-style diffs */
175 	if (strip == -1 && patch.git &&
176 	    (*patch.old == '\0' || !strncmp(patch.old, "a/", 2)) &&
177 	    (*patch.new == '\0' || !strncmp(patch.new, "b/", 2)))
178 		strip = 1;
179 
180 	/* prefer the new name if not /dev/null for not git-style diffs */
181 	if (!patch.git && *patch.new != '\0' && *patch.old != '\0') {
182 		err = got_path_strip(&p->old, patch.new, strip);
183 		if (err)
184 			goto done;
185 	} else if (*patch.old != '\0') {
186 		err = got_path_strip(&p->old, patch.old, strip);
187 		if (err)
188 			goto done;
189 	}
190 
191 	if (*patch.new != '\0') {
192 		err = got_path_strip(&p->new, patch.new, strip);
193 		if (err)
194 			goto done;
195 	}
196 
197 	if (p->old == NULL && p->new == NULL) {
198 		err = got_error(GOT_ERR_PATCH_MALFORMED);
199 		goto done;
200 	}
201 
202 	imsg_free(&imsg);
203 
204 	for (;;) {
205 		char *t;
206 
207 		err = got_privsep_recv_imsg(&imsg, ibuf, 0);
208 		if (err)
209 			return err;
210 
211 		switch (imsg.hdr.type) {
212 		case GOT_IMSG_PATCH_DONE:
213 			goto done;
214 		case GOT_IMSG_PATCH_HUNK:
215 			if (h != NULL && h->nonl) {
216 				err = got_error(GOT_ERR_PATCH_MALFORMED);
217 				goto done;
218 			}
219 			datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
220 			if (datalen != sizeof(hdr)) {
221 				err = got_error(GOT_ERR_PRIVSEP_LEN);
222 				goto done;
223 			}
224 			memcpy(&hdr, imsg.data, sizeof(hdr));
225 			if ((h = calloc(1, sizeof(*h))) == NULL) {
226 				err = got_error_from_errno("calloc");
227 				goto done;
228 			}
229 			h->old_from = hdr.oldfrom;
230 			h->old_lines = hdr.oldlines;
231 			h->new_from = hdr.newfrom;
232 			h->new_lines = hdr.newlines;
233 			STAILQ_INSERT_TAIL(&p->head, h, entries);
234 			break;
235 		case GOT_IMSG_PATCH_LINE:
236 			if (h == NULL) {
237 				err = got_error(GOT_ERR_PRIVSEP_MSG);
238 				goto done;
239 			}
240 			datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
241 			t = imsg.data;
242 			/* at least one char */
243 			if (datalen < 2 || t[datalen-1] != '\0') {
244 				err = got_error(GOT_ERR_PRIVSEP_MSG);
245 				goto done;
246 			}
247 			if (*t != ' ' && *t != '-' && *t != '+' &&
248 			    *t != '\\') {
249 				err = got_error(GOT_ERR_PRIVSEP_MSG);
250 				goto done;
251 			}
252 			if (h->nonl)
253 				err = got_error(GOT_ERR_PATCH_MALFORMED);
254 			if (*t == '\\')
255 				h->nonl = 1;
256 			else
257 				err = pushline(h, t);
258 			if (err)
259 				goto done;
260 			break;
261 		default:
262 			err = got_error(GOT_ERR_PRIVSEP_MSG);
263 			goto done;
264 		}
265 
266 		imsg_free(&imsg);
267 	}
268 
269 done:
270 	imsg_free(&imsg);
271 	return err;
272 }
273 
274 /*
275  * Copy data from orig starting at copypos until pos into tmp.
276  * If pos is -1, copy until EOF.
277  */
278 static const struct got_error *
279 copy(FILE *tmp, FILE *orig, off_t copypos, off_t pos)
280 {
281 	char buf[BUFSIZ];
282 	size_t len, r, w;
283 
284 	if (fseek(orig, copypos, SEEK_SET) == -1)
285 		return got_error_from_errno("fseek");
286 
287 	while (pos == -1 || copypos < pos) {
288 		len = sizeof(buf);
289 		if (pos > 0)
290 			len = MIN(len, (size_t)pos - copypos);
291 		r = fread(buf, 1, len, orig);
292 		if (r != len && ferror(orig))
293 			return got_error_from_errno("fread");
294 		w = fwrite(buf, 1, r, tmp);
295 		if (w != r)
296 			return got_error_from_errno("fwrite");
297 		copypos += len;
298 		if (r != len && feof(orig)) {
299 			if (pos == -1)
300 				return NULL;
301 			return got_error(GOT_ERR_HUNK_FAILED);
302 		}
303 	}
304 	return NULL;
305 }
306 
307 static const struct got_error *
308 locate_hunk(FILE *orig, struct got_patch_hunk *h, off_t *pos, long *lineno)
309 {
310 	const struct got_error *err = NULL;
311 	char *line = NULL;
312 	char mode = *h->lines[0];
313 	size_t linesize = 0;
314 	ssize_t linelen;
315 	off_t match = -1;
316 	long match_lineno = -1;
317 
318 	for (;;) {
319 		linelen = getline(&line, &linesize, orig);
320 		if (linelen == -1) {
321 			if (ferror(orig))
322 				err = got_error_from_errno("getline");
323 			else if (match == -1)
324 				err = got_error(GOT_ERR_HUNK_FAILED);
325 			break;
326 		}
327 		if (line[linelen - 1] == '\n')
328 			line[linelen - 1] = '\0';
329 		(*lineno)++;
330 
331 		if ((mode == ' ' && !strcmp(h->lines[0] + 1, line)) ||
332 		    (mode == '-' && !strcmp(h->lines[0] + 1, line)) ||
333 		    (mode == '+' && *lineno == h->old_from)) {
334 			match = ftello(orig);
335 			if (match == -1) {
336 				err = got_error_from_errno("ftello");
337 				break;
338 			}
339 			match -= linelen;
340 			match_lineno = (*lineno)-1;
341 		}
342 
343 		if (*lineno >= h->old_from && match != -1)
344 			break;
345 	}
346 
347 	if (err == NULL) {
348 		*pos = match;
349 		*lineno = match_lineno;
350 		if (fseek(orig, match, SEEK_SET) == -1)
351 			err = got_error_from_errno("fseek");
352 	}
353 
354 	free(line);
355 	return err;
356 }
357 
358 static const struct got_error *
359 test_hunk(FILE *orig, struct got_patch_hunk *h)
360 {
361 	const struct got_error *err = NULL;
362 	char *line = NULL;
363 	size_t linesize = 0, i = 0;
364 	ssize_t linelen;
365 
366 	for (i = 0; i < h->len; ++i) {
367 		switch (*h->lines[i]) {
368 		case '+':
369 			continue;
370 		case ' ':
371 		case '-':
372 			linelen = getline(&line, &linesize, orig);
373 			if (linelen == -1) {
374 				if (ferror(orig))
375 					err = got_error_from_errno("getline");
376 				else
377 					err = got_error(
378 					    GOT_ERR_HUNK_FAILED);
379 				goto done;
380 			}
381 			if (line[linelen - 1] == '\n')
382 				line[linelen - 1] = '\0';
383 			if (strcmp(h->lines[i] + 1, line)) {
384 				err = got_error(GOT_ERR_HUNK_FAILED);
385 				goto done;
386 			}
387 			break;
388 		}
389 	}
390 
391 done:
392 	free(line);
393 	return err;
394 }
395 
396 static const struct got_error *
397 apply_hunk(FILE *tmp, struct got_patch_hunk *h, long *lineno)
398 {
399 	size_t i = 0;
400 
401 	for (i = 0; i < h->len; ++i) {
402 		switch (*h->lines[i]) {
403 		case ' ':
404 			if (fprintf(tmp, "%s\n", h->lines[i] + 1) < 0)
405 				return got_error_from_errno("fprintf");
406 			/* fallthrough */
407 		case '-':
408 			(*lineno)++;
409 			break;
410 		case '+':
411 			if (fprintf(tmp, "%s", h->lines[i] + 1) < 0)
412 				return got_error_from_errno("fprintf");
413 			if (i != h->len - 1 || !h->nonl) {
414 				if (fprintf(tmp, "\n") < 0)
415 					return got_error_from_errno(
416 					    "fprintf");
417 			}
418 			break;
419 		}
420 	}
421 	return NULL;
422 }
423 
424 static const struct got_error *
425 patch_file(struct got_patch *p, const char *path, FILE *tmp, int nop,
426     mode_t *mode)
427 {
428 	const struct got_error *err = NULL;
429 	struct got_patch_hunk *h;
430 	struct stat sb;
431 	long lineno = 0;
432 	FILE *orig;
433 	off_t copypos, pos;
434 	char *line = NULL;
435 	size_t linesize = 0;
436 	ssize_t linelen;
437 
438 	if (p->old == NULL) {				/* create */
439 		h = STAILQ_FIRST(&p->head);
440 		if (h == NULL || STAILQ_NEXT(h, entries) != NULL)
441 			return got_error(GOT_ERR_PATCH_MALFORMED);
442 		if (nop)
443 			return NULL;
444 		return apply_hunk(tmp, h, &lineno);
445 	}
446 
447 	if ((orig = fopen(path, "r")) == NULL) {
448 		err = got_error_from_errno2("fopen", path);
449 		goto done;
450 	}
451 
452 	if (fstat(fileno(orig), &sb) == -1) {
453 		err = got_error_from_errno("fstat");
454 		goto done;
455 	}
456 	*mode = sb.st_mode;
457 
458 	copypos = 0;
459 	STAILQ_FOREACH(h, &p->head, entries) {
460 		if (h->lines == NULL)
461 			break;
462 
463 	tryagain:
464 		err = locate_hunk(orig, h, &pos, &lineno);
465 		if (err != NULL && err->code == GOT_ERR_HUNK_FAILED)
466 			h->err = err;
467 		if (err != NULL)
468 			goto done;
469 		if (!nop)
470 			err = copy(tmp, orig, copypos, pos);
471 		if (err != NULL)
472 			goto done;
473 		copypos = pos;
474 
475 		err = test_hunk(orig, h);
476 		if (err != NULL && err->code == GOT_ERR_HUNK_FAILED) {
477 			/*
478 			 * try to apply the hunk again starting the search
479 			 * after the previous partial match.
480 			 */
481 			if (fseek(orig, pos, SEEK_SET) == -1) {
482 				err = got_error_from_errno("fseek");
483 				goto done;
484 			}
485 			linelen = getline(&line, &linesize, orig);
486 			if (linelen == -1) {
487 				err = got_error_from_errno("getline");
488 				goto done;
489 			}
490 			lineno++;
491 			goto tryagain;
492 		}
493 		if (err != NULL)
494 			goto done;
495 
496 		if (lineno + 1 != h->old_from)
497 			h->offset = lineno + 1 - h->old_from;
498 
499 		if (!nop)
500 			err = apply_hunk(tmp, h, &lineno);
501 		if (err != NULL)
502 			goto done;
503 
504 		copypos = ftello(orig);
505 		if (copypos == -1) {
506 			err = got_error_from_errno("ftello");
507 			goto done;
508 		}
509 	}
510 
511 	if (p->new == NULL && sb.st_size != copypos) {
512 		h = STAILQ_FIRST(&p->head);
513 		h->err = got_error(GOT_ERR_HUNK_FAILED);
514 		err = h->err;
515 	} else if (!nop && !feof(orig))
516 		err = copy(tmp, orig, copypos, -1);
517 
518 done:
519 	if (orig != NULL)
520 		fclose(orig);
521 	return err;
522 }
523 
524 static const struct got_error *
525 report_progress(struct patch_args *pa, const char *old, const char *new,
526     unsigned char status, const struct got_error *orig_error)
527 {
528 	const struct got_error *err;
529 	struct got_patch_hunk *h;
530 
531 	err = pa->progress_cb(pa->progress_arg, old, new, status,
532 	    orig_error, 0, 0, 0, 0, 0, NULL);
533 	if (err)
534 		return err;
535 
536 	STAILQ_FOREACH(h, pa->head, entries) {
537 		if (h->offset == 0 && h->err == NULL)
538 			continue;
539 
540 		err = pa->progress_cb(pa->progress_arg, old, new, 0, NULL,
541 		    h->old_from, h->old_lines, h->new_from, h->new_lines,
542 		    h->offset, h->err);
543 		if (err)
544 			return err;
545 	}
546 
547 	return NULL;
548 }
549 
550 static const struct got_error *
551 patch_delete(void *arg, unsigned char status, unsigned char staged_status,
552     const char *path)
553 {
554 	return report_progress(arg, path, NULL, status, NULL);
555 }
556 
557 static const struct got_error *
558 patch_add(void *arg, unsigned char status, const char *path)
559 {
560 	return report_progress(arg, NULL, path, status, NULL);
561 }
562 
563 static const struct got_error *
564 apply_patch(struct got_worktree *worktree, struct got_repository *repo,
565     const char *oldpath, const char *newpath, struct got_patch *p,
566     int nop, struct patch_args *pa, got_cancel_cb cancel_cb, void *cancel_arg)
567 {
568 	const struct got_error *err = NULL;
569 	struct got_pathlist_head oldpaths, newpaths;
570 	struct got_pathlist_entry *pe;
571 	int file_renamed = 0;
572 	char *tmppath = NULL, *template = NULL, *parent = NULL;;
573 	FILE *tmp = NULL;
574 	mode_t mode = GOT_DEFAULT_FILE_MODE;
575 
576 	TAILQ_INIT(&oldpaths);
577 	TAILQ_INIT(&newpaths);
578 
579 	err = got_pathlist_insert(&pe, &oldpaths, oldpath, NULL);
580 	if (err)
581 		goto done;
582 	err = got_pathlist_insert(&pe, &newpaths, newpath, NULL);
583 	if (err)
584 		goto done;
585 
586 	file_renamed = strcmp(oldpath, newpath);
587 
588 	if (asprintf(&template, "%s/got-patch",
589 	    got_worktree_get_root_path(worktree)) == -1) {
590 		err = got_error_from_errno(template);
591 		goto done;
592 	}
593 
594 	if (!nop)
595 		err = got_opentemp_named(&tmppath, &tmp, template);
596 	if (err)
597 		goto done;
598 	err = patch_file(p, oldpath, tmp, nop, &mode);
599 	if (err)
600 		goto done;
601 
602 	if (nop)
603 		goto done;
604 
605 	if (p->old != NULL && p->new == NULL) {
606 		err = got_worktree_schedule_delete(worktree, &oldpaths,
607 		    0, NULL, patch_delete, pa, repo, 0, 0);
608 		goto done;
609 	}
610 
611 	if (fchmod(fileno(tmp), mode) == -1) {
612 		err = got_error_from_errno2("chmod", newpath);
613 		goto done;
614 	}
615 
616 	if (rename(tmppath, newpath) == -1) {
617 		if (errno != ENOENT) {
618 			err = got_error_from_errno3("rename", tmppath,
619 			    newpath);
620 			goto done;
621 		}
622 
623 		err = got_path_dirname(&parent, newpath);
624 		if (err != NULL)
625 			goto done;
626 		err = got_path_mkdir(parent);
627 		if (err != NULL)
628 			goto done;
629 		if (rename(tmppath, newpath) == -1) {
630 			err = got_error_from_errno3("rename", tmppath,
631 			    newpath);
632 			goto done;
633 		}
634 	}
635 
636 	if (file_renamed) {
637 		err = got_worktree_schedule_delete(worktree, &oldpaths,
638 		    0, NULL, patch_delete, pa, repo, 0, 0);
639 		if (err == NULL)
640 			err = got_worktree_schedule_add(worktree, &newpaths,
641 			    patch_add, pa, repo, 1);
642 		if (err)
643 			unlink(newpath);
644 	} else if (p->old == NULL) {
645 		err = got_worktree_schedule_add(worktree, &newpaths,
646 		    patch_add, pa, repo, 1);
647 		if (err)
648 			unlink(newpath);
649 	} else
650 		err = report_progress(pa, oldpath, newpath, GOT_STATUS_MODIFY,
651 		    NULL);
652 
653 done:
654 	got_pathlist_free(&oldpaths);
655 	got_pathlist_free(&newpaths);
656 	free(parent);
657 	free(template);
658 	if (tmppath != NULL)
659 		unlink(tmppath);
660 	free(tmppath);
661 	return err;
662 }
663 
664 const struct got_error *
665 got_patch(int fd, struct got_worktree *worktree, struct got_repository *repo,
666     int nop, int strip, got_patch_progress_cb progress_cb, void *progress_arg,
667     got_cancel_cb cancel_cb, void *cancel_arg)
668 {
669 	const struct got_error *err = NULL;
670 	struct got_fileindex *fileindex = NULL;
671 	char *oldpath, *newpath;
672 	struct imsgbuf *ibuf;
673 	int imsg_fds[2] = {-1, -1};
674 	int done = 0, failed = 0;
675 	pid_t pid;
676 
677 	ibuf = calloc(1, sizeof(*ibuf));
678 	if (ibuf == NULL) {
679 		err = got_error_from_errno("calloc");
680 		goto done;
681 	}
682 
683 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {
684 		err = got_error_from_errno("socketpair");
685 		goto done;
686 	}
687 
688 	pid = fork();
689 	if (pid == -1) {
690 		err = got_error_from_errno("fork");
691 		goto done;
692 	} else if (pid == 0) {
693 		got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_PATCH,
694 		    NULL);
695 		/* not reached */
696 	}
697 
698 	if (close(imsg_fds[1]) == -1) {
699 		err = got_error_from_errno("close");
700 		goto done;
701 	}
702 	imsg_fds[1] = -1;
703 	imsg_init(ibuf, imsg_fds[0]);
704 
705 	err = send_patch(ibuf, fd);
706 	fd = -1;
707 	if (err)
708 		goto done;
709 
710 	err = got_worktree_patch_prepare(&fileindex, worktree);
711 	if (err)
712 		goto done;
713 
714 	while (!done && err == NULL) {
715 		struct got_patch p;
716 		struct patch_args pa;
717 
718 		pa.progress_cb = progress_cb;
719 		pa.progress_arg = progress_arg;
720 		pa.head = &p.head;
721 
722 		err = recv_patch(ibuf, &done, &p, strip);
723 		if (err || done)
724 			break;
725 
726 		err = got_worktree_patch_check_path(p.old, p.new, &oldpath,
727 		    &newpath, worktree, repo, fileindex);
728 		if (err == NULL)
729 			err = apply_patch(worktree, repo, oldpath, newpath,
730 			    &p, nop, &pa, cancel_cb, cancel_arg);
731 		if (err != NULL) {
732 			failed = 1;
733 			/* recoverable errors */
734 			if (err->code == GOT_ERR_FILE_STATUS ||
735 			    (err->code == GOT_ERR_ERRNO && errno == ENOENT))
736 				err = report_progress(&pa, p.old, p.new,
737 				    GOT_STATUS_CANNOT_UPDATE, err);
738 			else if (err->code == GOT_ERR_HUNK_FAILED)
739 				err = report_progress(&pa, p.old, p.new,
740 				    GOT_STATUS_CANNOT_UPDATE, NULL);
741 		}
742 
743 		free(oldpath);
744 		free(newpath);
745 		patch_free(&p);
746 
747 		if (err)
748 			break;
749 	}
750 
751 done:
752 	if (fileindex)
753 		got_worktree_patch_complete(fileindex);
754 	if (fd != -1 && close(fd) == -1 && err == NULL)
755 		err = got_error_from_errno("close");
756 	if (ibuf != NULL)
757 		imsg_clear(ibuf);
758 	if (imsg_fds[0] != -1 && close(imsg_fds[0]) == -1 && err == NULL)
759 		err = got_error_from_errno("close");
760 	if (imsg_fds[1] != -1 && close(imsg_fds[1]) == -1 && err == NULL)
761 		err = got_error_from_errno("close");
762 	if (err == NULL && failed)
763 		err = got_error(GOT_ERR_PATCH_FAILED);
764 	return err;
765 }