1 /*
2  * Copyright (c) 2018, 2019 Stefan Sperling <stsp@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 
17 #include "got_compat.h"
18 
19 #include <sys/queue.h>
20 #include <sys/stat.h>
21 
22 #include <errno.h>
23 #include <dirent.h>
24 #include <fcntl.h>
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <stdint.h>
28 #include <string.h>
29 #include <limits.h>
30 #include <unistd.h>
31 
32 #include "got_error.h"
33 #include "got_object.h"
34 #include "got_path.h"
35 
36 #include "got_lib_hash.h"
37 #include "got_lib_fileindex.h"
38 #include "got_lib_worktree.h"
39 
40 /* got_fileindex_entry flags */
41 #define GOT_FILEIDX_F_PATH_LEN		0x00000fff
42 #define GOT_FILEIDX_F_STAGE		0x0000f000
43 #define GOT_FILEIDX_F_STAGE_SHIFT	12
44 #define GOT_FILEIDX_F_NOT_FLUSHED	0x00010000
45 #define GOT_FILEIDX_F_NO_BLOB		0x00020000
46 #define GOT_FILEIDX_F_NO_COMMIT		0x00040000
47 #define GOT_FILEIDX_F_NO_FILE_ON_DISK	0x00080000
48 #define GOT_FILEIDX_F_REMOVE_ON_FLUSH	0x00100000
49 #define GOT_FILEIDX_F_SKIPPED		0x00200000
50 
51 struct got_fileindex {
52 	struct got_fileindex_tree entries;
53 	int nentries; /* Does not include entries marked for removal. */
54 #define GOT_FILEIDX_MAX_ENTRIES INT32_MAX
55 };
56 
57 mode_t
58 got_fileindex_entry_perms_get(struct got_fileindex_entry *ie)
59 {
60 	return ((ie->mode & GOT_FILEIDX_MODE_PERMS) >>
61 	    GOT_FILEIDX_MODE_PERMS_SHIFT);
62 }
63 
64 static void
65 fileindex_entry_perms_set(struct got_fileindex_entry *ie, mode_t mode)
66 {
67 	ie->mode &= ~GOT_FILEIDX_MODE_PERMS;
68 	ie->mode |= ((mode << GOT_FILEIDX_MODE_PERMS_SHIFT) &
69 	    GOT_FILEIDX_MODE_PERMS);
70 }
71 
72 mode_t
73 got_fileindex_perms_to_st(struct got_fileindex_entry *ie)
74 {
75 	mode_t perms = got_fileindex_entry_perms_get(ie);
76 	int type = got_fileindex_entry_filetype_get(ie);
77 	uint32_t ftype;
78 
79 	if (type == GOT_FILEIDX_MODE_REGULAR_FILE ||
80 	    type == GOT_FILEIDX_MODE_BAD_SYMLINK)
81 		ftype = S_IFREG;
82 	else
83 		ftype = S_IFLNK;
84 
85 	return (ftype | (perms & (S_IRWXU | S_IRWXG | S_IRWXO)));
86 }
87 
88 const struct got_error *
89 got_fileindex_entry_update(struct got_fileindex_entry *ie,
90     int wt_fd, const char *ondisk_path, uint8_t *blob_sha1,
91     uint8_t *commit_sha1, int update_timestamps)
92 {
93 	struct stat sb;
94 
95 	if (fstatat(wt_fd, ondisk_path, &sb, AT_SYMLINK_NOFOLLOW) != 0) {
96 		if (!((ie->flags & GOT_FILEIDX_F_NO_FILE_ON_DISK) &&
97 		    errno == ENOENT))
98 			return got_error_from_errno2("fstatat", ondisk_path);
99 		sb.st_mode = GOT_DEFAULT_FILE_MODE;
100 	} else {
101 		if (sb.st_mode & S_IFDIR)
102 			return got_error_set_errno(EISDIR, ondisk_path);
103 		ie->flags &= ~GOT_FILEIDX_F_NO_FILE_ON_DISK;
104 	}
105 
106 	if ((ie->flags & GOT_FILEIDX_F_NO_FILE_ON_DISK) == 0) {
107 		if (update_timestamps) {
108 			ie->ctime_sec = sb.st_ctim.tv_sec;
109 			ie->ctime_nsec = sb.st_ctim.tv_nsec;
110 			ie->mtime_sec = sb.st_mtim.tv_sec;
111 			ie->mtime_nsec = sb.st_mtim.tv_nsec;
112 		}
113 		ie->uid = sb.st_uid;
114 		ie->gid = sb.st_gid;
115 		ie->size = (sb.st_size & 0xffffffff);
116 		if (S_ISLNK(sb.st_mode)) {
117 			got_fileindex_entry_filetype_set(ie,
118 			    GOT_FILEIDX_MODE_SYMLINK);
119 			fileindex_entry_perms_set(ie, 0);
120 		} else {
121 			got_fileindex_entry_filetype_set(ie,
122 			    GOT_FILEIDX_MODE_REGULAR_FILE);
123 			fileindex_entry_perms_set(ie,
124 			    sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO));
125 		}
126 	}
127 
128 	if (blob_sha1) {
129 		memmove(ie->blob_sha1, blob_sha1, SHA1_DIGEST_LENGTH);
130 		ie->flags &= ~GOT_FILEIDX_F_NO_BLOB;
131 	} else
132 		ie->flags |= GOT_FILEIDX_F_NO_BLOB;
133 
134 	if (commit_sha1) {
135 		memcpy(ie->commit_sha1, commit_sha1, SHA1_DIGEST_LENGTH);
136 		ie->flags &= ~GOT_FILEIDX_F_NO_COMMIT;
137 	} else
138 		ie->flags |= GOT_FILEIDX_F_NO_COMMIT;
139 
140 	return NULL;
141 }
142 
143 void
144 got_fileindex_entry_mark_deleted_from_disk(struct got_fileindex_entry *ie)
145 {
146 	ie->flags |= GOT_FILEIDX_F_NO_FILE_ON_DISK;
147 }
148 
149 void
150 got_fileindex_entry_mark_skipped(struct got_fileindex_entry *ie)
151 {
152 	ie->flags |= GOT_FILEIDX_F_SKIPPED;
153 }
154 
155 const struct got_error *
156 got_fileindex_entry_alloc(struct got_fileindex_entry **ie,
157     const char *relpath)
158 {
159 	size_t len;
160 
161 	*ie = calloc(1, sizeof(**ie));
162 	if (*ie == NULL)
163 		return got_error_from_errno("calloc");
164 
165 	(*ie)->path = strdup(relpath);
166 	if ((*ie)->path == NULL) {
167 		const struct got_error *err = got_error_from_errno("strdup");
168 		free(*ie);
169 		*ie = NULL;
170 		return err;
171 	}
172 
173 	len = strlen(relpath);
174 	if (len > GOT_FILEIDX_F_PATH_LEN)
175 		len = GOT_FILEIDX_F_PATH_LEN;
176 	(*ie)->flags |= len;
177 
178 	return NULL;
179 }
180 
181 void
182 got_fileindex_entry_free(struct got_fileindex_entry *ie)
183 {
184 	free(ie->path);
185 	free(ie);
186 }
187 
188 size_t
189 got_fileindex_entry_path_len(const struct got_fileindex_entry *ie)
190 {
191 	return (size_t)(ie->flags & GOT_FILEIDX_F_PATH_LEN);
192 }
193 
194 uint32_t
195 got_fileindex_entry_stage_get(const struct got_fileindex_entry *ie)
196 {
197 	return ((ie->flags & GOT_FILEIDX_F_STAGE) >> GOT_FILEIDX_F_STAGE_SHIFT);
198 }
199 
200 void
201 got_fileindex_entry_stage_set(struct got_fileindex_entry *ie, uint32_t stage)
202 {
203 	ie->flags &= ~GOT_FILEIDX_F_STAGE;
204 	ie->flags |= ((stage << GOT_FILEIDX_F_STAGE_SHIFT) &
205 	    GOT_FILEIDX_F_STAGE);
206 }
207 
208 int
209 got_fileindex_entry_filetype_get(struct got_fileindex_entry *ie)
210 {
211 	return (ie->mode & GOT_FILEIDX_MODE_FILE_TYPE_ONDISK);
212 }
213 
214 void
215 got_fileindex_entry_filetype_set(struct got_fileindex_entry *ie, int type)
216 {
217 	ie->mode &= ~GOT_FILEIDX_MODE_FILE_TYPE_ONDISK;
218 	ie->mode |= (type & GOT_FILEIDX_MODE_FILE_TYPE_ONDISK);
219 }
220 
221 void
222 got_fileindex_entry_staged_filetype_set(struct got_fileindex_entry *ie,
223     int type)
224 {
225 	ie->mode &= ~GOT_FILEIDX_MODE_FILE_TYPE_STAGED;
226 	ie->mode |= ((type << GOT_FILEIDX_MODE_FILE_TYPE_STAGED_SHIFT) &
227 	    GOT_FILEIDX_MODE_FILE_TYPE_STAGED);
228 }
229 
230 int
231 got_fileindex_entry_staged_filetype_get(struct got_fileindex_entry *ie)
232 {
233 	return (ie->mode & GOT_FILEIDX_MODE_FILE_TYPE_STAGED) >>
234 	    GOT_FILEIDX_MODE_FILE_TYPE_STAGED_SHIFT;
235 }
236 
237 int
238 got_fileindex_entry_has_blob(struct got_fileindex_entry *ie)
239 {
240 	return (ie->flags & GOT_FILEIDX_F_NO_BLOB) == 0;
241 }
242 
243 int
244 got_fileindex_entry_has_commit(struct got_fileindex_entry *ie)
245 {
246 	return (ie->flags & GOT_FILEIDX_F_NO_COMMIT) == 0;
247 }
248 
249 int
250 got_fileindex_entry_has_file_on_disk(struct got_fileindex_entry *ie)
251 {
252 	return (ie->flags & GOT_FILEIDX_F_NO_FILE_ON_DISK) == 0;
253 }
254 
255 int
256 got_fileindex_entry_was_skipped(struct got_fileindex_entry *ie)
257 {
258 	return (ie->flags & GOT_FILEIDX_F_SKIPPED) != 0;
259 }
260 
261 static const struct got_error *
262 add_entry(struct got_fileindex *fileindex, struct got_fileindex_entry *ie)
263 {
264 	if (fileindex->nentries >= GOT_FILEIDX_MAX_ENTRIES)
265 		return got_error(GOT_ERR_NO_SPACE);
266 
267 	if (RB_INSERT(got_fileindex_tree, &fileindex->entries, ie) != NULL)
268 		return got_error_path(ie->path, GOT_ERR_FILEIDX_DUP_ENTRY);
269 
270 	fileindex->nentries++;
271 	return NULL;
272 }
273 
274 const struct got_error *
275 got_fileindex_entry_add(struct got_fileindex *fileindex,
276     struct got_fileindex_entry *ie)
277 {
278 	/* Flag this entry until it gets written out to disk. */
279 	ie->flags |= GOT_FILEIDX_F_NOT_FLUSHED;
280 
281 	return add_entry(fileindex, ie);
282 }
283 
284 void
285 got_fileindex_entry_remove(struct got_fileindex *fileindex,
286     struct got_fileindex_entry *ie)
287 {
288 	/*
289 	 * Removing an entry from the RB tree immediately breaks
290 	 * in-progress iterations over file index entries.
291 	 * So flag this entry for removal and remove it once the index
292 	 * is written out to disk. Meanwhile, pretend this entry no longer
293 	 * exists if we get queried for it again before then.
294 	 */
295 	ie->flags |= GOT_FILEIDX_F_REMOVE_ON_FLUSH;
296 	fileindex->nentries--;
297 }
298 
299 struct got_fileindex_entry *
300 got_fileindex_entry_get(struct got_fileindex *fileindex, const char *path,
301     size_t path_len)
302 {
303 	struct got_fileindex_entry *ie;
304 	struct got_fileindex_entry key;
305 	memset(&key, 0, sizeof(key));
306 	key.path = (char *)path;
307 	key.flags = (path_len & GOT_FILEIDX_F_PATH_LEN);
308 	ie = RB_FIND(got_fileindex_tree, &fileindex->entries, &key);
309 	if (ie && (ie->flags & GOT_FILEIDX_F_REMOVE_ON_FLUSH))
310 		return NULL;
311 	return ie;
312 }
313 
314 const struct got_error *
315 got_fileindex_for_each_entry_safe(struct got_fileindex *fileindex,
316     got_fileindex_cb cb, void *cb_arg)
317 {
318 	const struct got_error *err;
319 	struct got_fileindex_entry *ie, *tmp;
320 
321 	RB_FOREACH_SAFE(ie, got_fileindex_tree, &fileindex->entries, tmp) {
322 		if (ie->flags & GOT_FILEIDX_F_REMOVE_ON_FLUSH)
323 			continue;
324 		err = (*cb)(cb_arg, ie);
325 		if (err)
326 			return err;
327 	}
328 	return NULL;
329 }
330 
331 struct got_fileindex *
332 got_fileindex_alloc(void)
333 {
334 	struct got_fileindex *fileindex;
335 
336 	fileindex = calloc(1, sizeof(*fileindex));
337 	if (fileindex == NULL)
338 		return NULL;
339 
340 	RB_INIT(&fileindex->entries);
341 	return fileindex;
342 }
343 
344 void
345 got_fileindex_free(struct got_fileindex *fileindex)
346 {
347 	struct got_fileindex_entry *ie;
348 
349 	while ((ie = RB_MIN(got_fileindex_tree, &fileindex->entries))) {
350 		RB_REMOVE(got_fileindex_tree, &fileindex->entries, ie);
351 		got_fileindex_entry_free(ie);
352 	}
353 	free(fileindex);
354 }
355 
356 static const struct got_error *
357 write_fileindex_val64(struct got_hash *ctx, uint64_t val, FILE *outfile)
358 {
359 	size_t n;
360 
361 	val = htobe64(val);
362 	got_hash_update(ctx, &val, sizeof(val));
363 	n = fwrite(&val, 1, sizeof(val), outfile);
364 	if (n != sizeof(val))
365 		return got_ferror(outfile, GOT_ERR_IO);
366 	return NULL;
367 }
368 
369 static const struct got_error *
370 write_fileindex_val32(struct got_hash *ctx, uint32_t val, FILE *outfile)
371 {
372 	size_t n;
373 
374 	val = htobe32(val);
375 	got_hash_update(ctx, &val, sizeof(val));
376 	n = fwrite(&val, 1, sizeof(val), outfile);
377 	if (n != sizeof(val))
378 		return got_ferror(outfile, GOT_ERR_IO);
379 	return NULL;
380 }
381 
382 static const struct got_error *
383 write_fileindex_val16(struct got_hash *ctx, uint16_t val, FILE *outfile)
384 {
385 	size_t n;
386 
387 	val = htobe16(val);
388 	got_hash_update(ctx, &val, sizeof(val));
389 	n = fwrite(&val, 1, sizeof(val), outfile);
390 	if (n != sizeof(val))
391 		return got_ferror(outfile, GOT_ERR_IO);
392 	return NULL;
393 }
394 
395 static const struct got_error *
396 write_fileindex_path(struct got_hash *ctx, const char *path, FILE *outfile)
397 {
398 	size_t n, len, pad = 0;
399 	static const uint8_t zero[8] = { 0 };
400 
401 	len = strlen(path);
402 	while ((len + pad) % 8 != 0)
403 		pad++;
404 	if (pad == 0)
405 		pad = 8; /* NUL-terminate */
406 
407 	got_hash_update(ctx, path, len);
408 	n = fwrite(path, 1, len, outfile);
409 	if (n != len)
410 		return got_ferror(outfile, GOT_ERR_IO);
411 	got_hash_update(ctx, zero, pad);
412 	n = fwrite(zero, 1, pad, outfile);
413 	if (n != pad)
414 		return got_ferror(outfile, GOT_ERR_IO);
415 	return NULL;
416 }
417 
418 static const struct got_error *
419 write_fileindex_entry(struct got_hash *ctx, struct got_fileindex_entry *ie,
420     FILE *outfile)
421 {
422 	const struct got_error *err;
423 	size_t n;
424 	uint32_t stage;
425 
426 	err = write_fileindex_val64(ctx, ie->ctime_sec, outfile);
427 	if (err)
428 		return err;
429 	err = write_fileindex_val64(ctx, ie->ctime_nsec, outfile);
430 	if (err)
431 		return err;
432 	err = write_fileindex_val64(ctx, ie->mtime_sec, outfile);
433 	if (err)
434 		return err;
435 	err = write_fileindex_val64(ctx, ie->mtime_nsec, outfile);
436 	if (err)
437 		return err;
438 
439 	err = write_fileindex_val32(ctx, ie->uid, outfile);
440 	if (err)
441 		return err;
442 	err = write_fileindex_val32(ctx, ie->gid, outfile);
443 	if (err)
444 		return err;
445 	err = write_fileindex_val32(ctx, ie->size, outfile);
446 	if (err)
447 		return err;
448 
449 	err = write_fileindex_val16(ctx, ie->mode, outfile);
450 	if (err)
451 		return err;
452 
453 	got_hash_update(ctx, ie->blob_sha1, SHA1_DIGEST_LENGTH);
454 	n = fwrite(ie->blob_sha1, 1, SHA1_DIGEST_LENGTH, outfile);
455 	if (n != SHA1_DIGEST_LENGTH)
456 		return got_ferror(outfile, GOT_ERR_IO);
457 
458 	got_hash_update(ctx, ie->commit_sha1, SHA1_DIGEST_LENGTH);
459 	n = fwrite(ie->commit_sha1, 1, SHA1_DIGEST_LENGTH, outfile);
460 	if (n != SHA1_DIGEST_LENGTH)
461 		return got_ferror(outfile, GOT_ERR_IO);
462 
463 	err = write_fileindex_val32(ctx, ie->flags, outfile);
464 	if (err)
465 		return err;
466 
467 	err = write_fileindex_path(ctx, ie->path, outfile);
468 	if (err)
469 		return err;
470 
471 	stage = got_fileindex_entry_stage_get(ie);
472 	if (stage == GOT_FILEIDX_STAGE_MODIFY ||
473 	    stage == GOT_FILEIDX_STAGE_ADD) {
474 		got_hash_update(ctx, ie->staged_blob_sha1, SHA1_DIGEST_LENGTH);
475 		n = fwrite(ie->staged_blob_sha1, 1, SHA1_DIGEST_LENGTH,
476 		    outfile);
477 		if (n != SHA1_DIGEST_LENGTH)
478 			return got_ferror(outfile, GOT_ERR_IO);
479 	}
480 
481 	return NULL;
482 }
483 
484 const struct got_error *
485 got_fileindex_write(struct got_fileindex *fileindex, FILE *outfile)
486 {
487 	const struct got_error *err = NULL;
488 	struct got_fileindex_hdr hdr;
489 	struct got_hash ctx;
490 	uint8_t hash[GOT_HASH_DIGEST_MAXLEN];
491 	size_t n;
492 	struct got_fileindex_entry *ie, *tmp;
493 
494 	got_hash_init(&ctx, GOT_HASH_SHA1);
495 
496 	hdr.signature = htobe32(GOT_FILE_INDEX_SIGNATURE);
497 	hdr.version = htobe32(GOT_FILE_INDEX_VERSION);
498 	hdr.nentries = htobe32(fileindex->nentries);
499 
500 	got_hash_update(&ctx, &hdr.signature, sizeof(hdr.signature));
501 	got_hash_update(&ctx, &hdr.version, sizeof(hdr.version));
502 	got_hash_update(&ctx, &hdr.nentries, sizeof(hdr.nentries));
503 	n = fwrite(&hdr.signature, 1, sizeof(hdr.signature), outfile);
504 	if (n != sizeof(hdr.signature))
505 		return got_ferror(outfile, GOT_ERR_IO);
506 	n = fwrite(&hdr.version, 1, sizeof(hdr.version), outfile);
507 	if (n != sizeof(hdr.version))
508 		return got_ferror(outfile, GOT_ERR_IO);
509 	n = fwrite(&hdr.nentries, 1, sizeof(hdr.nentries), outfile);
510 	if (n != sizeof(hdr.nentries))
511 		return got_ferror(outfile, GOT_ERR_IO);
512 
513 	RB_FOREACH_SAFE(ie, got_fileindex_tree, &fileindex->entries, tmp) {
514 		ie->flags &= ~GOT_FILEIDX_F_NOT_FLUSHED;
515 		ie->flags &= ~GOT_FILEIDX_F_SKIPPED;
516 		if (ie->flags & GOT_FILEIDX_F_REMOVE_ON_FLUSH) {
517 			RB_REMOVE(got_fileindex_tree, &fileindex->entries, ie);
518 			got_fileindex_entry_free(ie);
519 			continue;
520 		}
521 		err = write_fileindex_entry(&ctx, ie, outfile);
522 		if (err)
523 			return err;
524 	}
525 
526 	got_hash_final(&ctx, hash);
527 	n = fwrite(hash, 1, SHA1_DIGEST_LENGTH, outfile);
528 	if (n != SHA1_DIGEST_LENGTH)
529 		return got_ferror(outfile, GOT_ERR_IO);
530 
531 	if (fflush(outfile) != 0)
532 		return got_error_from_errno("fflush");
533 
534 	return NULL;
535 }
536 
537 static const struct got_error *
538 read_fileindex_val64(uint64_t *val, struct got_hash *ctx, FILE *infile)
539 {
540 	size_t n;
541 
542 	n = fread(val, 1, sizeof(*val), infile);
543 	if (n != sizeof(*val))
544 		return got_ferror(infile, GOT_ERR_FILEIDX_BAD);
545 	got_hash_update(ctx, val, sizeof(*val));
546 	*val = be64toh(*val);
547 	return NULL;
548 }
549 
550 static const struct got_error *
551 read_fileindex_val32(uint32_t *val, struct got_hash *ctx, FILE *infile)
552 {
553 	size_t n;
554 
555 	n = fread(val, 1, sizeof(*val), infile);
556 	if (n != sizeof(*val))
557 		return got_ferror(infile, GOT_ERR_FILEIDX_BAD);
558 	got_hash_update(ctx, val, sizeof(*val));
559 	*val = be32toh(*val);
560 	return NULL;
561 }
562 
563 static const struct got_error *
564 read_fileindex_val16(uint16_t *val, struct got_hash *ctx, FILE *infile)
565 {
566 	size_t n;
567 
568 	n = fread(val, 1, sizeof(*val), infile);
569 	if (n != sizeof(*val))
570 		return got_ferror(infile, GOT_ERR_FILEIDX_BAD);
571 	got_hash_update(ctx, val, sizeof(*val));
572 	*val = be16toh(*val);
573 	return NULL;
574 }
575 
576 static const struct got_error *
577 read_fileindex_path(char **path, struct got_hash *ctx, FILE *infile)
578 {
579 	const size_t chunk_size = 8;
580 	char p[PATH_MAX];
581 	size_t n, len = 0;
582 
583 	do {
584 		if (len + chunk_size > sizeof(p))
585 			return got_error(GOT_ERR_FILEIDX_BAD);
586 
587 		n = fread(&p[len], 1, chunk_size, infile);
588 		if (n != chunk_size)
589 			return got_ferror(infile, GOT_ERR_FILEIDX_BAD);
590 
591 		got_hash_update(ctx, &p[len], chunk_size);
592 		len += chunk_size;
593 	} while (memchr(&p[len - chunk_size], '\0', chunk_size) == NULL);
594 
595 	*path = strdup(p);
596 	if (*path == NULL)
597 		return got_error_from_errno("strdup");
598 	return NULL;
599 }
600 
601 static const struct got_error *
602 read_fileindex_entry(struct got_fileindex_entry **iep, struct got_hash *ctx,
603     FILE *infile, uint32_t version)
604 {
605 	const struct got_error *err;
606 	struct got_fileindex_entry *ie;
607 	size_t n;
608 
609 	*iep = NULL;
610 
611 	ie = calloc(1, sizeof(*ie));
612 	if (ie == NULL)
613 		return got_error_from_errno("calloc");
614 
615 	err = read_fileindex_val64(&ie->ctime_sec, ctx, infile);
616 	if (err)
617 		goto done;
618 	err = read_fileindex_val64(&ie->ctime_nsec, ctx, infile);
619 	if (err)
620 		goto done;
621 	err = read_fileindex_val64(&ie->mtime_sec, ctx, infile);
622 	if (err)
623 		goto done;
624 	err = read_fileindex_val64(&ie->mtime_nsec, ctx, infile);
625 	if (err)
626 		goto done;
627 
628 	err = read_fileindex_val32(&ie->uid, ctx, infile);
629 	if (err)
630 		goto done;
631 	err = read_fileindex_val32(&ie->gid, ctx, infile);
632 	if (err)
633 		goto done;
634 	err = read_fileindex_val32(&ie->size, ctx, infile);
635 	if (err)
636 		goto done;
637 
638 	err = read_fileindex_val16(&ie->mode, ctx, infile);
639 	if (err)
640 		goto done;
641 
642 	n = fread(ie->blob_sha1, 1, SHA1_DIGEST_LENGTH, infile);
643 	if (n != SHA1_DIGEST_LENGTH) {
644 		err = got_ferror(infile, GOT_ERR_FILEIDX_BAD);
645 		goto done;
646 	}
647 	got_hash_update(ctx, ie->blob_sha1, SHA1_DIGEST_LENGTH);
648 
649 	n = fread(ie->commit_sha1, 1, SHA1_DIGEST_LENGTH, infile);
650 	if (n != SHA1_DIGEST_LENGTH) {
651 		err = got_ferror(infile, GOT_ERR_FILEIDX_BAD);
652 		goto done;
653 	}
654 	got_hash_update(ctx, ie->commit_sha1, SHA1_DIGEST_LENGTH);
655 
656 	err = read_fileindex_val32(&ie->flags, ctx, infile);
657 	if (err)
658 		goto done;
659 
660 	err = read_fileindex_path(&ie->path, ctx, infile);
661 	if (err)
662 		goto done;
663 
664 	if (version >= 2) {
665 		uint32_t stage = got_fileindex_entry_stage_get(ie);
666 		if (stage == GOT_FILEIDX_STAGE_MODIFY ||
667 		    stage == GOT_FILEIDX_STAGE_ADD) {
668 			n = fread(ie->staged_blob_sha1, 1, SHA1_DIGEST_LENGTH,
669 			    infile);
670 			if (n != SHA1_DIGEST_LENGTH) {
671 				err = got_ferror(infile, GOT_ERR_FILEIDX_BAD);
672 				goto done;
673 			}
674 			got_hash_update(ctx, ie->staged_blob_sha1,
675 			    SHA1_DIGEST_LENGTH);
676 		}
677 	} else {
678 		/* GOT_FILE_INDEX_VERSION 1 does not support staging. */
679 		ie->flags &= ~GOT_FILEIDX_F_STAGE;
680 	}
681 
682 done:
683 	if (err)
684 		got_fileindex_entry_free(ie);
685 	else
686 		*iep = ie;
687 	return err;
688 }
689 
690 const struct got_error *
691 got_fileindex_read(struct got_fileindex *fileindex, FILE *infile)
692 {
693 	const struct got_error *err = NULL;
694 	struct got_fileindex_hdr hdr;
695 	struct got_hash ctx;
696 	struct got_fileindex_entry *ie;
697 	uint8_t sha1_expected[SHA1_DIGEST_LENGTH];
698 	uint8_t sha1[SHA1_DIGEST_LENGTH];
699 	size_t n;
700 	int i;
701 
702 	got_hash_init(&ctx, GOT_HASH_SHA1);
703 
704 	n = fread(&hdr.signature, 1, sizeof(hdr.signature), infile);
705 	if (n != sizeof(hdr.signature)) {
706 		if (n == 0) /* EOF */
707 			return NULL;
708 		return got_ferror(infile, GOT_ERR_FILEIDX_BAD);
709 	}
710 	n = fread(&hdr.version, 1, sizeof(hdr.version), infile);
711 	if (n != sizeof(hdr.version)) {
712 		if (n == 0) /* EOF */
713 			return NULL;
714 		return got_ferror(infile, GOT_ERR_FILEIDX_BAD);
715 	}
716 	n = fread(&hdr.nentries, 1, sizeof(hdr.nentries), infile);
717 	if (n != sizeof(hdr.nentries)) {
718 		if (n == 0) /* EOF */
719 			return NULL;
720 		return got_ferror(infile, GOT_ERR_FILEIDX_BAD);
721 	}
722 
723 	got_hash_update(&ctx, &hdr.signature, sizeof(hdr.signature));
724 	got_hash_update(&ctx, &hdr.version, sizeof(hdr.version));
725 	got_hash_update(&ctx, &hdr.nentries, sizeof(hdr.nentries));
726 
727 	hdr.signature = be32toh(hdr.signature);
728 	hdr.version = be32toh(hdr.version);
729 	hdr.nentries = be32toh(hdr.nentries);
730 
731 	if (hdr.signature != GOT_FILE_INDEX_SIGNATURE)
732 		return got_error(GOT_ERR_FILEIDX_SIG);
733 	if (hdr.version > GOT_FILE_INDEX_VERSION)
734 		return got_error(GOT_ERR_FILEIDX_VER);
735 
736 	for (i = 0; i < hdr.nentries; i++) {
737 		err = read_fileindex_entry(&ie, &ctx, infile, hdr.version);
738 		if (err)
739 			return err;
740 		err = add_entry(fileindex, ie);
741 		if (err) {
742 			got_fileindex_entry_free(ie);
743 			return err;
744 		}
745 	}
746 
747 	n = fread(sha1_expected, 1, sizeof(sha1_expected), infile);
748 	if (n != sizeof(sha1_expected))
749 		return got_ferror(infile, GOT_ERR_FILEIDX_BAD);
750 	got_hash_final(&ctx, sha1);
751 	if (memcmp(sha1, sha1_expected, SHA1_DIGEST_LENGTH) != 0)
752 		return got_error(GOT_ERR_FILEIDX_CSUM);
753 
754 	return NULL;
755 }
756 
757 static struct got_fileindex_entry *
758 walk_fileindex(struct got_fileindex *fileindex, struct got_fileindex_entry *ie)
759 {
760 	struct got_fileindex_entry *next;
761 
762 	next = RB_NEXT(got_fileindex_tree, &fileindex->entries, ie);
763 
764 	/* Skip entries which were added or removed by diff callbacks. */
765 	while (next && (next->flags & (GOT_FILEIDX_F_NOT_FLUSHED |
766 	    GOT_FILEIDX_F_REMOVE_ON_FLUSH)))
767 		next = RB_NEXT(got_fileindex_tree, &fileindex->entries, next);
768 
769 	return next;
770 }
771 
772 static const struct got_error *
773 diff_fileindex_tree(struct got_fileindex *, struct got_fileindex_entry **ie,
774     struct got_tree_object *tree, const char *, const char *,
775     struct got_repository *, struct got_fileindex_diff_tree_cb *, void *);
776 
777 static const struct got_error *
778 walk_tree(struct got_tree_entry **next, struct got_fileindex *fileindex,
779     struct got_fileindex_entry **ie, struct got_tree_object *tree, int *tidx,
780     const char *path, const char *entry_name, struct got_repository *repo,
781     struct got_fileindex_diff_tree_cb *cb, void *cb_arg)
782 {
783 	const struct got_error *err = NULL;
784 	struct got_tree_entry *te = got_object_tree_get_entry(tree, *tidx);
785 
786 	if (!got_object_tree_entry_is_submodule(te) &&
787 	    S_ISDIR(got_tree_entry_get_mode(te))) {
788 		char *subpath;
789 		struct got_tree_object *subtree;
790 
791 		if (asprintf(&subpath, "%s%s%s", path,
792 		    path[0] == '\0' ? "" : "/",
793 		    got_tree_entry_get_name(te)) == -1)
794 			return got_error_from_errno("asprintf");
795 
796 		err = got_object_open_as_tree(&subtree, repo,
797 		    got_tree_entry_get_id(te));
798 		if (err) {
799 			free(subpath);
800 			return err;
801 		}
802 
803 		err = diff_fileindex_tree(fileindex, ie, subtree, subpath,
804 		    entry_name, repo, cb, cb_arg);
805 		free(subpath);
806 		got_object_tree_close(subtree);
807 		if (err)
808 			return err;
809 	}
810 
811 	(*tidx)++;
812 	*next = got_object_tree_get_entry(tree, *tidx);
813 	return NULL;
814 }
815 
816 static const struct got_error *
817 diff_fileindex_tree(struct got_fileindex *fileindex,
818     struct got_fileindex_entry **ie, struct got_tree_object *tree,
819     const char *path, const char *entry_name, struct got_repository *repo,
820     struct got_fileindex_diff_tree_cb *cb, void *cb_arg)
821 {
822 	const struct got_error *err = NULL;
823 	struct got_tree_entry *te = NULL;
824 	size_t path_len = strlen(path);
825 	struct got_fileindex_entry *next;
826 	int tidx = 0;
827 
828 	te = got_object_tree_get_entry(tree, tidx);
829 	while ((*ie && got_path_is_child((*ie)->path, path, path_len)) || te) {
830 		if (te && *ie) {
831 			char *te_path;
832 			const char *te_name = got_tree_entry_get_name(te);
833 			int cmp;
834 			if (asprintf(&te_path, "%s/%s", path, te_name) == -1) {
835 				err = got_error_from_errno("asprintf");
836 				break;
837 			}
838 			cmp = got_path_cmp((*ie)->path, te_path,
839 			    got_fileindex_entry_path_len(*ie), strlen(te_path));
840 			free(te_path);
841 			if (cmp == 0) {
842 				if (got_path_is_child((*ie)->path, path,
843 				    path_len) &&
844 				    !got_object_tree_entry_is_submodule(te) &&
845 				    (entry_name == NULL ||
846 				    strcmp(te_name, entry_name) == 0)) {
847 					err = cb->diff_old_new(cb_arg, *ie, te,
848 					    path);
849 					if (err || entry_name)
850 						break;
851 				}
852 				*ie = walk_fileindex(fileindex, *ie);
853 				err = walk_tree(&te, fileindex, ie, tree, &tidx,
854 				    path, entry_name, repo, cb, cb_arg);
855 			} else if (cmp < 0) {
856 				next = walk_fileindex(fileindex, *ie);
857 				if (got_path_is_child((*ie)->path, path,
858 				    path_len) && entry_name == NULL) {
859 					err = cb->diff_old(cb_arg, *ie, path);
860 					if (err || entry_name)
861 						break;
862 				}
863 				*ie = next;
864 			} else {
865 				if ((entry_name == NULL ||
866 				    strcmp(te_name, entry_name) == 0)) {
867 					err = cb->diff_new(cb_arg, te, path);
868 					if (err || entry_name)
869 						break;
870 				}
871 				err = walk_tree(&te, fileindex, ie, tree, &tidx,
872 				    path, entry_name, repo, cb, cb_arg);
873 			}
874 			if (err)
875 				break;
876 		} else if (*ie) {
877 			next = walk_fileindex(fileindex, *ie);
878 			if (got_path_is_child((*ie)->path, path, path_len) &&
879 			    (entry_name == NULL ||
880 			    (te && strcmp(got_tree_entry_get_name(te),
881 			    entry_name) == 0))) {
882 				err = cb->diff_old(cb_arg, *ie, path);
883 				if (err || entry_name)
884 					break;
885 			}
886 			*ie = next;
887 		} else if (te) {
888 			if (!got_object_tree_entry_is_submodule(te) &&
889 			    (entry_name == NULL ||
890 			    strcmp(got_tree_entry_get_name(te), entry_name)
891 			    == 0)) {
892 				err = cb->diff_new(cb_arg, te, path);
893 				if (err || entry_name)
894 					break;
895 			}
896 			err = walk_tree(&te, fileindex, ie, tree, &tidx, path,
897 			    entry_name, repo, cb, cb_arg);
898 			if (err)
899 				break;
900 		}
901 	}
902 
903 	return err;
904 }
905 
906 const struct got_error *
907 got_fileindex_diff_tree(struct got_fileindex *fileindex,
908     struct got_tree_object *tree, const char *path, const char *entry_name,
909     struct got_repository *repo,
910     struct got_fileindex_diff_tree_cb *cb, void *cb_arg)
911 {
912 	struct got_fileindex_entry *ie;
913 	ie = RB_MIN(got_fileindex_tree, &fileindex->entries);
914 	while (ie && !got_path_is_child(ie->path, path, strlen(path)))
915 		ie = walk_fileindex(fileindex, ie);
916 	return diff_fileindex_tree(fileindex, &ie, tree, path, entry_name, repo,
917 	    cb, cb_arg);
918 }
919 
920 static const struct got_error *
921 diff_fileindex_dir(struct got_fileindex *, struct got_fileindex_entry **,
922     struct got_pathlist_head *, int, const char *, const char *,
923     struct got_repository *, struct got_fileindex_diff_dir_cb *, void *);
924 
925 static const struct got_error *
926 read_dirlist(struct got_pathlist_head *dirlist, DIR *dir, const char *path)
927 {
928 	const struct got_error *err = NULL;
929 	struct got_pathlist_entry *new = NULL;
930 	struct dirent *dep = NULL;
931 	struct dirent *de = NULL;
932 
933 	for (;;) {
934 		de = malloc(sizeof(struct dirent) + NAME_MAX + 1);
935 		if (de == NULL) {
936 			err = got_error_from_errno("malloc");
937 			break;
938 		}
939 
940 		if (readdir_r(dir, de, &dep) != 0) {
941 			err = got_error_from_errno("readdir_r");
942 			free(de);
943 			break;
944 		}
945 		if (dep == NULL) {
946 			free(de);
947 			break;
948 		}
949 
950 		if (strcmp(de->d_name, ".") == 0 ||
951 		    strcmp(de->d_name, "..") == 0 ||
952 		    (path[0] == '\0' &&
953 		    strcmp(de->d_name, GOT_WORKTREE_GOT_DIR) == 0) ||
954 		    (path[0] == '\0' &&
955 		    strcmp(de->d_name, GOT_WORKTREE_CVG_DIR) == 0)) {
956 			free(de);
957 			continue;
958 		}
959 
960 		err = got_pathlist_insert(&new, dirlist, de->d_name, de);
961 		if (err) {
962 			free(de);
963 			break;
964 		}
965 		if (new == NULL) {
966 			err = got_error(GOT_ERR_DIR_DUP_ENTRY);
967 			free(de);
968 			break;
969 		}
970 	}
971 
972 	return err;
973 }
974 
975 static int
976 have_tracked_file_in_dir(struct got_fileindex *fileindex, const char *path)
977 {
978 	struct got_fileindex_entry *ie;
979 	size_t path_len = strlen(path);
980 	int cmp;
981 
982 	ie = RB_ROOT(&fileindex->entries);
983 	while (ie) {
984 		if (got_path_is_child(ie->path, path, path_len))
985 			return 1;
986 		cmp = got_path_cmp(path, ie->path, path_len,
987 		    got_fileindex_entry_path_len(ie));
988 		if (cmp < 0)
989 			ie = RB_LEFT(ie, entry);
990 		else if (cmp > 0)
991 			ie = RB_RIGHT(ie, entry);
992 		else
993 			break;
994 	}
995 
996 	return 0;
997 }
998 
999 static const struct got_error *
1000 walk_dir(struct got_pathlist_entry **next, struct got_fileindex *fileindex,
1001     struct got_fileindex_entry **ie, struct got_pathlist_entry *dle, int fd,
1002     const char *path, const char *rootpath, struct got_repository *repo,
1003     int ignore, struct got_fileindex_diff_dir_cb *cb, void *cb_arg)
1004 {
1005 	const struct got_error *err = NULL;
1006 	struct dirent *de = dle->data;
1007 	DIR *subdir = NULL;
1008 	int subdirfd = -1;
1009 
1010 	*next = NULL;
1011 
1012 	/* Must traverse ignored directories if they contain tracked files. */
1013 	if (de->d_type == DT_DIR && ignore &&
1014 	    have_tracked_file_in_dir(fileindex, path))
1015 		ignore = 0;
1016 
1017 	if (de->d_type == DT_DIR && !ignore) {
1018 		char *subpath;
1019 		char *subdirpath;
1020 		struct got_pathlist_head subdirlist;
1021 
1022 		TAILQ_INIT(&subdirlist);
1023 
1024 		if (asprintf(&subpath, "%s%s%s", path,
1025 		    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1026 			return got_error_from_errno("asprintf");
1027 
1028 		if (asprintf(&subdirpath, "%s/%s", rootpath, subpath) == -1) {
1029 			free(subpath);
1030 			return got_error_from_errno("asprintf");
1031 		}
1032 
1033 		subdirfd = openat(fd, de->d_name,
1034 		    O_RDONLY | O_NOFOLLOW | O_DIRECTORY | O_CLOEXEC);
1035 		if (subdirfd == -1) {
1036 			if (errno == EACCES) {
1037 				*next = TAILQ_NEXT(dle, entry);
1038 				return NULL;
1039 			}
1040 			err = got_error_from_errno2("openat", subdirpath);
1041 			free(subpath);
1042 			free(subdirpath);
1043 			return err;
1044 		}
1045 
1046 		subdir = fdopendir(subdirfd);
1047 		if (subdir == NULL) {
1048 			err = got_error_from_errno2("fdopendir", path);
1049 			close(subdirfd);
1050 			free(subpath);
1051 			free(subdirpath);
1052 			return err;
1053 		}
1054 		subdirfd = -1;
1055 		err = read_dirlist(&subdirlist, subdir, subdirpath);
1056 		if (err) {
1057 			free(subpath);
1058 			free(subdirpath);
1059 			closedir(subdir);
1060 			return err;
1061 		}
1062 		err = diff_fileindex_dir(fileindex, ie, &subdirlist,
1063 		    dirfd(subdir), rootpath, subpath, repo, cb, cb_arg);
1064 		if (subdir && closedir(subdir) == -1 && err == NULL)
1065 			err = got_error_from_errno2("closedir", subdirpath);
1066 		free(subpath);
1067 		free(subdirpath);
1068 		got_pathlist_free(&subdirlist, GOT_PATHLIST_FREE_DATA);
1069 		if (err)
1070 			return err;
1071 	}
1072 
1073 	*next = TAILQ_NEXT(dle, entry);
1074 	return NULL;
1075 }
1076 
1077 static const struct got_error *
1078 dirent_type_fixup(struct dirent *de, const char *rootpath, const char *path)
1079 {
1080 	const struct got_error *err;
1081 	char *dir_path;
1082 	int type;
1083 
1084 	if (de->d_type != DT_UNKNOWN)
1085 		return NULL;
1086 
1087 	/* DT_UNKNOWN occurs on NFS mounts without "readdir plus" RPC. */
1088 	if (asprintf(&dir_path, "%s/%s", rootpath, path) == -1)
1089 		return got_error_from_errno("asprintf");
1090 	err = got_path_dirent_type(&type, dir_path, de);
1091 	free(dir_path);
1092 	if (err)
1093 		return err;
1094 
1095 	de->d_type = type;
1096 	return NULL;
1097 }
1098 
1099 static const struct got_error *
1100 diff_fileindex_dir(struct got_fileindex *fileindex,
1101     struct got_fileindex_entry **ie, struct got_pathlist_head *dirlist,
1102     int dirfd, const char *rootpath, const char *path,
1103     struct got_repository *repo,
1104     struct got_fileindex_diff_dir_cb *cb, void *cb_arg)
1105 {
1106 	const struct got_error *err = NULL;
1107 	struct dirent *de = NULL;
1108 	size_t path_len = strlen(path);
1109 	struct got_pathlist_entry *dle;
1110 	int ignore;
1111 
1112 	if (cb->diff_traverse) {
1113 		err = cb->diff_traverse(cb_arg, path, dirfd);
1114 		if (err)
1115 			return err;
1116 	}
1117 
1118 	dle = TAILQ_FIRST(dirlist);
1119 	while ((*ie && got_path_is_child((*ie)->path, path, path_len)) || dle) {
1120 		if (dle && *ie) {
1121 			char *de_path;
1122 			int cmp;
1123 			de = dle->data;
1124 			err = dirent_type_fixup(de, rootpath, path);
1125 			if (err)
1126 				break;
1127 			if (asprintf(&de_path, "%s/%s", path,
1128 			    de->d_name) == -1) {
1129 				err = got_error_from_errno("asprintf");
1130 				break;
1131 			}
1132 			cmp = got_path_cmp((*ie)->path, de_path,
1133 			    got_fileindex_entry_path_len(*ie),
1134 			    strlen(path) + 1 + strlen(de->d_name));
1135 			free(de_path);
1136 			if (cmp == 0) {
1137 				err = cb->diff_old_new(cb_arg, *ie, de, path,
1138 				    dirfd);
1139 				if (err)
1140 					break;
1141 				*ie = walk_fileindex(fileindex, *ie);
1142 				err = walk_dir(&dle, fileindex, ie, dle, dirfd,
1143 				    path, rootpath, repo, 0, cb, cb_arg);
1144 			} else if (cmp < 0 ) {
1145 				err = cb->diff_old(cb_arg, *ie, path);
1146 				if (err)
1147 					break;
1148 				*ie = walk_fileindex(fileindex, *ie);
1149 			} else {
1150 				err = cb->diff_new(&ignore, cb_arg, de, path,
1151 				    dirfd);
1152 				if (err)
1153 					break;
1154 				err = walk_dir(&dle, fileindex, ie, dle, dirfd,
1155 				    path, rootpath, repo, ignore, cb, cb_arg);
1156 			}
1157 			if (err)
1158 				break;
1159 		} else if (*ie) {
1160 			err = cb->diff_old(cb_arg, *ie, path);
1161 			if (err)
1162 				break;
1163 			*ie = walk_fileindex(fileindex, *ie);
1164 		} else if (dle) {
1165 			de = dle->data;
1166 			err = dirent_type_fixup(de, rootpath, path);
1167 			if (err)
1168 				break;
1169 			err = cb->diff_new(&ignore, cb_arg, de, path, dirfd);
1170 			if (err)
1171 				break;
1172 			err = walk_dir(&dle, fileindex, ie, dle, dirfd, path,
1173 			    rootpath, repo, ignore, cb, cb_arg);
1174 			if (err)
1175 				break;
1176 		}
1177 	}
1178 
1179 	return err;
1180 }
1181 
1182 const struct got_error *
1183 got_fileindex_diff_dir(struct got_fileindex *fileindex, int fd,
1184     const char *rootpath, const char *path, struct got_repository *repo,
1185     struct got_fileindex_diff_dir_cb *cb, void *cb_arg)
1186 {
1187 	const struct got_error *err;
1188 	struct got_fileindex_entry *ie;
1189 	struct got_pathlist_head dirlist;
1190 	int fd2;
1191 	DIR *dir;
1192 
1193 	TAILQ_INIT(&dirlist);
1194 
1195 	/*
1196 	 * Duplicate the file descriptor so we can call closedir() below
1197 	 * without closing the file descriptor passed in by our caller.
1198 	 */
1199 	fd2 = dup(fd);
1200 	if (fd2 == -1)
1201 		return got_error_from_errno2("dup", path);
1202 	if (lseek(fd2, 0, SEEK_SET) == -1) {
1203 		err = got_error_from_errno2("lseek", path);
1204 		close(fd2);
1205 		return err;
1206 	}
1207 	dir = fdopendir(fd2);
1208 	if (dir == NULL) {
1209 		err = got_error_from_errno2("fdopendir", path);
1210 		close(fd2);
1211 		return err;
1212 	}
1213 	err = read_dirlist(&dirlist, dir, path);
1214 	if (err) {
1215 		closedir(dir);
1216 		return err;
1217 	}
1218 
1219 	ie = RB_MIN(got_fileindex_tree, &fileindex->entries);
1220 	while (ie && !got_path_is_child(ie->path, path, strlen(path)))
1221 		ie = walk_fileindex(fileindex, ie);
1222 	err = diff_fileindex_dir(fileindex, &ie, &dirlist, dirfd(dir),
1223 	    rootpath, path, repo, cb, cb_arg);
1224 
1225 	if (closedir(dir) == -1 && err == NULL)
1226 		err = got_error_from_errno2("closedir", path);
1227 	got_pathlist_free(&dirlist, GOT_PATHLIST_FREE_DATA);
1228 	return err;
1229 }
1230 
1231 struct got_object_id *
1232 got_fileindex_entry_get_staged_blob_id(struct got_object_id *id,
1233     struct got_fileindex_entry *ie)
1234 {
1235 	memset(id, 0, sizeof(*id));
1236 	memcpy(id->sha1, ie->staged_blob_sha1, sizeof(ie->staged_blob_sha1));
1237 	return id;
1238 }
1239 
1240 struct got_object_id *
1241 got_fileindex_entry_get_blob_id(struct got_object_id *id,
1242     struct got_fileindex_entry *ie)
1243 {
1244 	memset(id, 0, sizeof(*id));
1245 	memcpy(id->sha1, ie->blob_sha1, sizeof(ie->blob_sha1));
1246 	return id;
1247 }
1248 
1249 struct got_object_id *
1250 got_fileindex_entry_get_commit_id(struct got_object_id *id,
1251     struct got_fileindex_entry *ie)
1252 {
1253 	memset(id, 0, sizeof(*id));
1254 	memcpy(id->sha1, ie->commit_sha1, sizeof(ie->commit_sha1));
1255 	return id;
1256 }
1257 
1258 RB_GENERATE(got_fileindex_tree, got_fileindex_entry, entry, got_fileindex_cmp);