/home/ben/Projects/got/got/../lib/fileindex.c

Bug Summary

File:	got/../lib/fileindex.c
Warning:	line 1181, column 1 Dereference of null pointer
Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd6.9 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name fileindex.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -fno-split-dwarf-inlining -debugger-tuning=gdb -resource-dir /usr/local/lib/clang/11.1.0 -I /home/ben/Projects/got/got/../include -I /home/ben/Projects/got/got/../lib -D GOT_LIBEXECDIR=/home/ben/bin -D GOT_VERSION=0.53-current -internal-isystem /usr/local/lib/clang/11.1.0/include -internal-externc-isystem /usr/include -O0 -fdebug-compilation-dir /home/ben/Projects/got/got/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -o /home/ben/Projects/got/scan/2021-05-28-230913-68537-1 -x c /home/ben/Projects/got/got/../lib/fileindex.c
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 <sys/queue.h>
18#include <sys/tree.h>
19#include <sys/stat.h>
20 
21#include <errno(*__errno()).h>
22#include <dirent.h>
23#include <fcntl.h>
24#include <stdio.h>
25#include <stdlib.h>
26#include <string.h>
27#include <sha1.h>
28#include <endian.h>
29#include <limits.h>
30#include <unistd.h>
31#include <uuid.h>
32 
33#include "got_error.h"
34#include "got_object.h"
35#include "got_path.h"
36 
37#include "got_lib_fileindex.h"
38#include "got_lib_worktree.h"
39 
40/* got_fileindex_entry flags */
41#define GOT_FILEIDX_F_PATH_LEN0x00000fff		0x00000fff
42#define GOT_FILEIDX_F_STAGE0x0000f000		0x0000f000
43#define GOT_FILEIDX_F_STAGE_SHIFT12	12
44#define GOT_FILEIDX_F_NOT_FLUSHED0x00010000	0x00010000
45#define GOT_FILEIDX_F_NO_BLOB0x00020000		0x00020000
46#define GOT_FILEIDX_F_NO_COMMIT0x00040000		0x00040000
47#define GOT_FILEIDX_F_NO_FILE_ON_DISK0x00080000	0x00080000
48#define GOT_FILEIDX_F_REMOVE_ON_FLUSH0x00100000	0x00100000
49 
50struct got_fileindex {
51	struct got_fileindex_tree entries;
52	int nentries; /* Does not include entries marked for removal. */
53#define GOT_FILEIDX_MAX_ENTRIES2147483647 INT_MAX2147483647
54};
55 
56mode_t
57got_fileindex_entry_perms_get(struct got_fileindex_entry *ie)
58{
59	return ((ie->mode & GOT_FILEIDX_MODE_PERMS0xfff0) >>
60	    GOT_FILEIDX_MODE_PERMS_SHIFT4);
61}
62 
63static void
64fileindex_entry_perms_set(struct got_fileindex_entry *ie, mode_t mode)
65{
66	ie->mode &= ~GOT_FILEIDX_MODE_PERMS0xfff0;
67	ie->mode |= ((mode << GOT_FILEIDX_MODE_PERMS_SHIFT4) &
68	    GOT_FILEIDX_MODE_PERMS0xfff0);
69}
70 
71mode_t
72got_fileindex_perms_to_st(struct got_fileindex_entry *ie)
73{
74	mode_t perms = got_fileindex_entry_perms_get(ie);
75	int type = got_fileindex_entry_filetype_get(ie);
76	uint32_t ftype;
77 
78	if (type == GOT_FILEIDX_MODE_REGULAR_FILE1 ||
79	    type == GOT_FILEIDX_MODE_BAD_SYMLINK3)
80		ftype = S_IFREG0100000;
81	else
82		ftype = S_IFLNK0120000;
83 
84	return (ftype | (perms & (S_IRWXU0000700 | S_IRWXG0000070 | S_IRWXO0000007)));
85}
86 
87const struct got_error *
88got_fileindex_entry_update(struct got_fileindex_entry *ie,
89    int wt_fd, const char *ondisk_path, uint8_t *blob_sha1,
90    uint8_t *commit_sha1, int update_timestamps)
91{
92	struct stat sb;
93 
94	if (fstatat(wt_fd, ondisk_path, &sb, AT_SYMLINK_NOFOLLOW0x02) != 0) {
95		if (!((ie->flags & GOT_FILEIDX_F_NO_FILE_ON_DISK0x00080000) &&
96		    errno(*__errno()) == ENOENT2))
97			return got_error_from_errno2("fstatat", ondisk_path);
98		sb.st_mode = GOT_DEFAULT_FILE_MODE(0100000 | 0000400|0000200 | 0000040 | 0000004);
99	} else {
100		if (sb.st_mode & S_IFDIR0040000)
101			return got_error_set_errno(EISDIR21, ondisk_path);
102		ie->flags &= ~GOT_FILEIDX_F_NO_FILE_ON_DISK0x00080000;
103	}
104 
105 
106	if ((ie->flags & GOT_FILEIDX_F_NO_FILE_ON_DISK0x00080000) == 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)((sb.st_mode & 0170000) == 0120000)) {
117			got_fileindex_entry_filetype_set(ie,
118			    GOT_FILEIDX_MODE_SYMLINK2);
119			fileindex_entry_perms_set(ie, 0);
120		} else {
121			got_fileindex_entry_filetype_set(ie,
122			    GOT_FILEIDX_MODE_REGULAR_FILE1);
123			fileindex_entry_perms_set(ie,
124			    sb.st_mode & (S_IRWXU0000700 | S_IRWXG0000070 | S_IRWXO0000007));
125		}
126	}
127 
128	if (blob_sha1) {
129		memcpy(ie->blob_sha1, blob_sha1, SHA1_DIGEST_LENGTH20);
130		ie->flags &= ~GOT_FILEIDX_F_NO_BLOB0x00020000;
131	} else
132		ie->flags |= GOT_FILEIDX_F_NO_BLOB0x00020000;
133 
134	if (commit_sha1) {
135		memcpy(ie->commit_sha1, commit_sha1, SHA1_DIGEST_LENGTH20);
136		ie->flags &= ~GOT_FILEIDX_F_NO_COMMIT0x00040000;
137	} else
138		ie->flags |= GOT_FILEIDX_F_NO_COMMIT0x00040000;
139 
140	return NULL((void *)0);
141}
142 
143void
144got_fileindex_entry_mark_deleted_from_disk(struct got_fileindex_entry *ie)
145{
146	ie->flags |= GOT_FILEIDX_F_NO_FILE_ON_DISK0x00080000;
147}
148 
149const struct got_error *
150got_fileindex_entry_alloc(struct got_fileindex_entry **ie,
151    const char *relpath)
152{
153	size_t len;
154 
155	*ie = calloc(1, sizeof(**ie));
156	if (*ie == NULL((void *)0))
157		return got_error_from_errno("calloc");
158 
159	(*ie)->path = strdup(relpath);
160	if ((*ie)->path == NULL((void *)0)) {
161		const struct got_error *err = got_error_from_errno("strdup");
162		free(*ie);
163		*ie = NULL((void *)0);
164		return err;
165	}
166 
167	len = strlen(relpath);
168	if (len > GOT_FILEIDX_F_PATH_LEN0x00000fff)
169		len = GOT_FILEIDX_F_PATH_LEN0x00000fff;
170	(*ie)->flags |= len;
171 
172	return NULL((void *)0);
173}
174 
175void
176got_fileindex_entry_free(struct got_fileindex_entry *ie)
177{
178	free(ie->path);
179	free(ie);
180}
181 
182size_t
183got_fileindex_entry_path_len(const struct got_fileindex_entry *ie)
184{
185	return (size_t)(ie->flags & GOT_FILEIDX_F_PATH_LEN0x00000fff);
186}
187 
188uint32_t
189got_fileindex_entry_stage_get(const struct got_fileindex_entry *ie)
190{
191	return ((ie->flags & GOT_FILEIDX_F_STAGE0x0000f000) >> GOT_FILEIDX_F_STAGE_SHIFT12);
192}
193 
194void
195got_fileindex_entry_stage_set(struct got_fileindex_entry *ie, uint32_t stage)
196{
197	ie->flags &= ~GOT_FILEIDX_F_STAGE0x0000f000;
198	ie->flags |= ((stage << GOT_FILEIDX_F_STAGE_SHIFT12) &
199	    GOT_FILEIDX_F_STAGE0x0000f000);
200}
201 
202int
203got_fileindex_entry_filetype_get(struct got_fileindex_entry *ie)
204{
205	return (ie->mode & GOT_FILEIDX_MODE_FILE_TYPE_ONDISK0x0003);
206}
207 
208void
209got_fileindex_entry_filetype_set(struct got_fileindex_entry *ie, int type)
210{
211	ie->mode &= ~GOT_FILEIDX_MODE_FILE_TYPE_ONDISK0x0003;
212	ie->mode |= (type & GOT_FILEIDX_MODE_FILE_TYPE_ONDISK0x0003);
213}
214 
215void
216got_fileindex_entry_staged_filetype_set(struct got_fileindex_entry *ie, int type)
217{
218	ie->mode &= ~GOT_FILEIDX_MODE_FILE_TYPE_STAGED0x000c;
219	ie->mode |= ((type << GOT_FILEIDX_MODE_FILE_TYPE_STAGED_SHIFT2) &
220	    GOT_FILEIDX_MODE_FILE_TYPE_STAGED0x000c);
221}
222 
223int
224got_fileindex_entry_staged_filetype_get(struct got_fileindex_entry *ie)
225{
226	return (ie->mode & GOT_FILEIDX_MODE_FILE_TYPE_STAGED0x000c) >>
227	    GOT_FILEIDX_MODE_FILE_TYPE_STAGED_SHIFT2;
228}
229 
230int
231got_fileindex_entry_has_blob(struct got_fileindex_entry *ie)
232{
233	return (ie->flags & GOT_FILEIDX_F_NO_BLOB0x00020000) == 0;
234}
235 
236int
237got_fileindex_entry_has_commit(struct got_fileindex_entry *ie)
238{
239	return (ie->flags & GOT_FILEIDX_F_NO_COMMIT0x00040000) == 0;
240}
241 
242int
243got_fileindex_entry_has_file_on_disk(struct got_fileindex_entry *ie)
244{
245	return (ie->flags & GOT_FILEIDX_F_NO_FILE_ON_DISK0x00080000) == 0;
246}
247 
248static const struct got_error *
249add_entry(struct got_fileindex *fileindex, struct got_fileindex_entry *ie)
250{
251	if (fileindex->nentries >= GOT_FILEIDX_MAX_ENTRIES2147483647)
26
←
Assuming field 'nentries' is < GOT_FILEIDX_MAX_ENTRIES→
27
←
Taking false branch→
252		return got_error(GOT_ERR_NO_SPACE9);
253 
254	RB_INSERT(got_fileindex_tree, &fileindex->entries, ie)got_fileindex_tree_RB_INSERT(&fileindex->entries, ie);
28
←
Passing null pointer value via 2nd parameter 'elm'→
29
←
Calling 'got_fileindex_tree_RB_INSERT'→
255	fileindex->nentries++;
256	return NULL((void *)0);
257}
258 
259const struct got_error *
260got_fileindex_entry_add(struct got_fileindex *fileindex,
261    struct got_fileindex_entry *ie)
262{
263	/* Flag this entry until it gets written out to disk. */
264	ie->flags |= GOT_FILEIDX_F_NOT_FLUSHED0x00010000;
265 
266	return add_entry(fileindex, ie);
267}
268 
269void
270got_fileindex_entry_remove(struct got_fileindex *fileindex,
271    struct got_fileindex_entry *ie)
272{
273	/*
274	 * Removing an entry from the RB tree immediately breaks
275	 * in-progress iterations over file index entries.
276	 * So flag this entry for removal and remove it once the index
277	 * is written out to disk. Meanwhile, pretend this entry no longer
278	 * exists if we get queried for it again before then.
279	 */
280	ie->flags |= GOT_FILEIDX_F_REMOVE_ON_FLUSH0x00100000;
281	fileindex->nentries--;
282}
283 
284struct got_fileindex_entry *
285got_fileindex_entry_get(struct got_fileindex *fileindex, const char *path,
286    size_t path_len)
287{
288	struct got_fileindex_entry *ie;
289	struct got_fileindex_entry key;
290	memset(&key, 0, sizeof(key));
291	key.path = (char *)path;
292	key.flags = (path_len & GOT_FILEIDX_F_PATH_LEN0x00000fff);
293	ie = RB_FIND(got_fileindex_tree, &fileindex->entries, &key)got_fileindex_tree_RB_FIND(&fileindex->entries, &key
);
294	if (ie && (ie->flags & GOT_FILEIDX_F_REMOVE_ON_FLUSH0x00100000))
295		return NULL((void *)0);
296	return ie;
297}
298 
299const struct got_error *
300got_fileindex_for_each_entry_safe(struct got_fileindex *fileindex,
301    got_fileindex_cb cb, void *cb_arg)
302{
303	const struct got_error *err;
304	struct got_fileindex_entry *ie, *tmp;
305 
306	RB_FOREACH_SAFE(ie, got_fileindex_tree, &fileindex->entries, tmp)for ((ie) = got_fileindex_tree_RB_MINMAX(&fileindex->entries
, -1); ((ie) != ((void *)0)) && ((tmp) = got_fileindex_tree_RB_NEXT
(ie), 1); (ie) = (tmp)) {
307		if (ie->flags & GOT_FILEIDX_F_REMOVE_ON_FLUSH0x00100000)
308			continue;
309		err = (*cb)(cb_arg, ie);
310		if (err)
311			return err;
312	}
313	return NULL((void *)0);
314}
315 
316struct got_fileindex *
317got_fileindex_alloc(void)
318{
319	struct got_fileindex *fileindex;
320 
321	fileindex = calloc(1, sizeof(*fileindex));
322	if (fileindex == NULL((void *)0))
323		return NULL((void *)0);
324 
325	RB_INIT(&fileindex->entries)do { (&fileindex->entries)->rbh_root = ((void *)0);
 } while (0);
326	return fileindex;
327}
328 
329void
330got_fileindex_free(struct got_fileindex *fileindex)
331{
332	struct got_fileindex_entry *ie;
333 
334	while ((ie = RB_MIN(got_fileindex_tree, &fileindex->entries)got_fileindex_tree_RB_MINMAX(&fileindex->entries, -1))) {
335		RB_REMOVE(got_fileindex_tree, &fileindex->entries, ie)got_fileindex_tree_RB_REMOVE(&fileindex->entries, ie);
336		got_fileindex_entry_free(ie);
337	}
338	free(fileindex);
339}
340 
341static const struct got_error *
342write_fileindex_val64(SHA1_CTX *ctx, uint64_t val, FILE *outfile)
343{
344	size_t n;
345 
346	val = htobe64(val)(__uint64_t)(__builtin_constant_p(val) ? (__uint64_t)((((__uint64_t
)(val) & 0xff) << 56) | ((__uint64_t)(val) & 0xff00ULL
) << 40 | ((__uint64_t)(val) & 0xff0000ULL) <<
 24 | ((__uint64_t)(val) & 0xff000000ULL) << 8 | ((
__uint64_t)(val) & 0xff00000000ULL) >> 8 | ((__uint64_t
)(val) & 0xff0000000000ULL) >> 24 | ((__uint64_t)(val
) & 0xff000000000000ULL) >> 40 | ((__uint64_t)(val)
 & 0xff00000000000000ULL) >> 56) : __swap64md(val));
347	SHA1Update(ctx, (uint8_t *)&val, sizeof(val));
348	n = fwrite(&val, 1, sizeof(val), outfile);
349	if (n != sizeof(val))
350		return got_ferror(outfile, GOT_ERR_IO6);
351	return NULL((void *)0);
352}
353 
354static const struct got_error *
355write_fileindex_val32(SHA1_CTX *ctx, uint32_t val, FILE *outfile)
356{
357	size_t n;
358 
359	val = htobe32(val)(__uint32_t)(__builtin_constant_p(val) ? (__uint32_t)(((__uint32_t
)(val) & 0xff) << 24 | ((__uint32_t)(val) & 0xff00
) << 8 | ((__uint32_t)(val) & 0xff0000) >> 8 |
 ((__uint32_t)(val) & 0xff000000) >> 24) : __swap32md
(val));
360	SHA1Update(ctx, (uint8_t *)&val, sizeof(val));
361	n = fwrite(&val, 1, sizeof(val), outfile);
362	if (n != sizeof(val))
363		return got_ferror(outfile, GOT_ERR_IO6);
364	return NULL((void *)0);
365}
366 
367static const struct got_error *
368write_fileindex_val16(SHA1_CTX *ctx, uint16_t val, FILE *outfile)
369{
370	size_t n;
371 
372	val = htobe16(val)(__uint16_t)(__builtin_constant_p(val) ? (__uint16_t)(((__uint16_t
)(val) & 0xffU) << 8 | ((__uint16_t)(val) & 0xff00U
) >> 8) : __swap16md(val));
373	SHA1Update(ctx, (uint8_t *)&val, sizeof(val));
374	n = fwrite(&val, 1, sizeof(val), outfile);
375	if (n != sizeof(val))
376		return got_ferror(outfile, GOT_ERR_IO6);
377	return NULL((void *)0);
378}
379 
380static const struct got_error *
381write_fileindex_path(SHA1_CTX *ctx, const char *path, FILE *outfile)
382{
383	size_t n, len, pad = 0;
384	static const uint8_t zero[8] = { 0 };
385 
386	len = strlen(path);
387	while ((len + pad) % 8 != 0)
388		pad++;
389	if (pad == 0)
390		pad = 8; /* NUL-terminate */
391 
392	SHA1Update(ctx, path, len);
393	n = fwrite(path, 1, len, outfile);
394	if (n != len)
395		return got_ferror(outfile, GOT_ERR_IO6);
396	SHA1Update(ctx, zero, pad);
397	n = fwrite(zero, 1, pad, outfile);
398	if (n != pad)
399		return got_ferror(outfile, GOT_ERR_IO6);
400	return NULL((void *)0);
401}
402 
403static const struct got_error *
404write_fileindex_entry(SHA1_CTX *ctx, struct got_fileindex_entry *ie,
405    FILE *outfile)
406{
407	const struct got_error *err;
408	size_t n;
409	uint32_t stage;
410 
411	err = write_fileindex_val64(ctx, ie->ctime_sec, outfile);
412	if (err)
413		return err;
414	err = write_fileindex_val64(ctx, ie->ctime_nsec, outfile);
415	if (err)
416		return err;
417	err = write_fileindex_val64(ctx, ie->mtime_sec, outfile);
418	if (err)
419		return err;
420	err = write_fileindex_val64(ctx, ie->mtime_nsec, outfile);
421	if (err)
422		return err;
423 
424	err = write_fileindex_val32(ctx, ie->uid, outfile);
425	if (err)
426		return err;
427	err = write_fileindex_val32(ctx, ie->gid, outfile);
428	if (err)
429		return err;
430	err = write_fileindex_val32(ctx, ie->size, outfile);
431	if (err)
432		return err;
433 
434	err = write_fileindex_val16(ctx, ie->mode, outfile);
435	if (err)
436		return err;
437 
438	SHA1Update(ctx, ie->blob_sha1, SHA1_DIGEST_LENGTH20);
439	n = fwrite(ie->blob_sha1, 1, SHA1_DIGEST_LENGTH20, outfile);
440	if (n != SHA1_DIGEST_LENGTH20)
441		return got_ferror(outfile, GOT_ERR_IO6);
442 
443	SHA1Update(ctx, ie->commit_sha1, SHA1_DIGEST_LENGTH20);
444	n = fwrite(ie->commit_sha1, 1, SHA1_DIGEST_LENGTH20, outfile);
445	if (n != SHA1_DIGEST_LENGTH20)
446		return got_ferror(outfile, GOT_ERR_IO6);
447 
448	err = write_fileindex_val32(ctx, ie->flags, outfile);
449	if (err)
450		return err;
451 
452	err = write_fileindex_path(ctx, ie->path, outfile);
453	if (err)
454		return err;
455 
456	stage = got_fileindex_entry_stage_get(ie);
457	if (stage == GOT_FILEIDX_STAGE_MODIFY1 ||
458	    stage == GOT_FILEIDX_STAGE_ADD2) {
459		SHA1Update(ctx, ie->staged_blob_sha1, SHA1_DIGEST_LENGTH20);
460		n = fwrite(ie->staged_blob_sha1, 1, SHA1_DIGEST_LENGTH20,
461		    outfile);
462		if (n != SHA1_DIGEST_LENGTH20)
463			return got_ferror(outfile, GOT_ERR_IO6);
464	}
465 
466	return NULL((void *)0);
467}
468 
469const struct got_error *
470got_fileindex_write(struct got_fileindex *fileindex, FILE *outfile)
471{
472	const struct got_error *err = NULL((void *)0);
473	struct got_fileindex_hdr hdr;
474	SHA1_CTX ctx;
475	uint8_t sha1[SHA1_DIGEST_LENGTH20];
476	size_t n;
477	struct got_fileindex_entry *ie, *tmp;
478 
479	SHA1Init(&ctx);
480 
481	hdr.signature = htobe32(GOT_FILE_INDEX_SIGNATURE)(__uint32_t)(__builtin_constant_p(0x676f7449) ? (__uint32_t)(
((__uint32_t)(0x676f7449) & 0xff) << 24 | ((__uint32_t
)(0x676f7449) & 0xff00) << 8 | ((__uint32_t)(0x676f7449
) & 0xff0000) >> 8 | ((__uint32_t)(0x676f7449) &
 0xff000000) >> 24) : __swap32md(0x676f7449));
482	hdr.version = htobe32(GOT_FILE_INDEX_VERSION)(__uint32_t)(__builtin_constant_p(2) ? (__uint32_t)(((__uint32_t
)(2) & 0xff) << 24 | ((__uint32_t)(2) & 0xff00)
 << 8 | ((__uint32_t)(2) & 0xff0000) >> 8 | (
(__uint32_t)(2) & 0xff000000) >> 24) : __swap32md(2
));
483	hdr.nentries = htobe32(fileindex->nentries)(__uint32_t)(__builtin_constant_p(fileindex->nentries) ? (
__uint32_t)(((__uint32_t)(fileindex->nentries) & 0xff)
 << 24 | ((__uint32_t)(fileindex->nentries) & 0xff00
) << 8 | ((__uint32_t)(fileindex->nentries) & 0xff0000
) >> 8 | ((__uint32_t)(fileindex->nentries) & 0xff000000
) >> 24) : __swap32md(fileindex->nentries));
484 
485	SHA1Update(&ctx, (uint8_t *)&hdr.signature, sizeof(hdr.signature));
486	SHA1Update(&ctx, (uint8_t *)&hdr.version, sizeof(hdr.version));
487	SHA1Update(&ctx, (uint8_t *)&hdr.nentries, sizeof(hdr.nentries));
488	n = fwrite(&hdr.signature, 1, sizeof(hdr.signature), outfile);
489	if (n != sizeof(hdr.signature))
490		return got_ferror(outfile, GOT_ERR_IO6);
491	n = fwrite(&hdr.version, 1, sizeof(hdr.version), outfile);
492	if (n != sizeof(hdr.version))
493		return got_ferror(outfile, GOT_ERR_IO6);
494	n = fwrite(&hdr.nentries, 1, sizeof(hdr.nentries), outfile);
495	if (n != sizeof(hdr.nentries))
496		return got_ferror(outfile, GOT_ERR_IO6);
497 
498	RB_FOREACH_SAFE(ie, got_fileindex_tree, &fileindex->entries, tmp)for ((ie) = got_fileindex_tree_RB_MINMAX(&fileindex->entries
, -1); ((ie) != ((void *)0)) && ((tmp) = got_fileindex_tree_RB_NEXT
(ie), 1); (ie) = (tmp)) {
499		ie->flags &= ~GOT_FILEIDX_F_NOT_FLUSHED0x00010000;
500		if (ie->flags & GOT_FILEIDX_F_REMOVE_ON_FLUSH0x00100000) {
501			RB_REMOVE(got_fileindex_tree, &fileindex->entries, ie)got_fileindex_tree_RB_REMOVE(&fileindex->entries, ie);
502			got_fileindex_entry_free(ie);
503			continue;
504		}
505		err = write_fileindex_entry(&ctx, ie, outfile);
506		if (err)
507			return err;
508	}
509 
510	SHA1Final(sha1, &ctx);
511	n = fwrite(sha1, 1, sizeof(sha1), outfile);
512	if (n != sizeof(sha1))
513		return got_ferror(outfile, GOT_ERR_IO6);
514 
515	if (fflush(outfile) != 0)
516		return got_error_from_errno("fflush");
517 
518	return NULL((void *)0);
519}
520 
521static const struct got_error *
522read_fileindex_val64(uint64_t *val, SHA1_CTX *ctx, FILE *infile)
523{
524	size_t n;
525 
526	n = fread(val, 1, sizeof(*val), infile);
527	if (n != sizeof(*val))
528		return got_ferror(infile, GOT_ERR_FILEIDX_BAD56);
529	SHA1Update(ctx, (uint8_t *)val, sizeof(*val));
530	*val = be64toh(*val)(__uint64_t)(__builtin_constant_p(*val) ? (__uint64_t)((((__uint64_t
)(*val) & 0xff) << 56) | ((__uint64_t)(*val) & 0xff00ULL
) << 40 | ((__uint64_t)(*val) & 0xff0000ULL) <<
 24 | ((__uint64_t)(*val) & 0xff000000ULL) << 8 | (
(__uint64_t)(*val) & 0xff00000000ULL) >> 8 | ((__uint64_t
)(*val) & 0xff0000000000ULL) >> 24 | ((__uint64_t)(
*val) & 0xff000000000000ULL) >> 40 | ((__uint64_t)(
*val) & 0xff00000000000000ULL) >> 56) : __swap64md(
*val));
531	return NULL((void *)0);
532}
533 
534static const struct got_error *
535read_fileindex_val32(uint32_t *val, SHA1_CTX *ctx, FILE *infile)
536{
537	size_t n;
538 
539	n = fread(val, 1, sizeof(*val), infile);
540	if (n != sizeof(*val))
541		return got_ferror(infile, GOT_ERR_FILEIDX_BAD56);
542	SHA1Update(ctx, (uint8_t *)val, sizeof(*val));
543	*val = be32toh(*val)(__uint32_t)(__builtin_constant_p(*val) ? (__uint32_t)(((__uint32_t
)(*val) & 0xff) << 24 | ((__uint32_t)(*val) & 0xff00
) << 8 | ((__uint32_t)(*val) & 0xff0000) >> 8
 | ((__uint32_t)(*val) & 0xff000000) >> 24) : __swap32md
(*val));
544	return NULL((void *)0);
545}
546 
547static const struct got_error *
548read_fileindex_val16(uint16_t *val, SHA1_CTX *ctx, FILE *infile)
549{
550	size_t n;
551 
552	n = fread(val, 1, sizeof(*val), infile);
553	if (n != sizeof(*val))
554		return got_ferror(infile, GOT_ERR_FILEIDX_BAD56);
555	SHA1Update(ctx, (uint8_t *)val, sizeof(*val));
556	*val = be16toh(*val)(__uint16_t)(__builtin_constant_p(*val) ? (__uint16_t)(((__uint16_t
)(*val) & 0xffU) << 8 | ((__uint16_t)(*val) & 0xff00U
) >> 8) : __swap16md(*val));
557	return NULL((void *)0);
558}
559 
560static const struct got_error *
561read_fileindex_path(char **path, SHA1_CTX *ctx, FILE *infile)
562{
563	const struct got_error *err = NULL((void *)0);
564	const size_t chunk_size = 8;
565	size_t n, len = 0, totlen = chunk_size;
566 
567	*path = malloc(totlen);
568	if (*path == NULL((void *)0))
569		return got_error_from_errno("malloc");
570 
571	do {
572		if (len + chunk_size > totlen) {
573			char *p = reallocarray(*path, totlen + chunk_size, 1);
574			if (p == NULL((void *)0)) {
575				err = got_error_from_errno("reallocarray");
576				break;
577			}
578			totlen += chunk_size;
579			*path = p;
580		}
581		n = fread(*path + len, 1, chunk_size, infile);
582		if (n != chunk_size) {
583			err = got_ferror(infile, GOT_ERR_FILEIDX_BAD56);
584			break;
585		}
586		SHA1Update(ctx, *path + len, chunk_size);
587		len += chunk_size;
588	} while (memchr(*path + len - chunk_size, '\0', chunk_size) == NULL((void *)0));
589 
590	if (err) {
591		free(*path);
592		*path = NULL((void *)0);
593	}
594	return err;
595}
596 
597static const struct got_error *
598read_fileindex_entry(struct got_fileindex_entry **iep, SHA1_CTX *ctx,
599    FILE *infile, uint32_t version)
600{
601	const struct got_error *err;
602	struct got_fileindex_entry *ie;
603	size_t n;
604 
605	*iep = NULL((void *)0);
17
←
Null pointer value stored to 'ie'→
606 
607	ie = calloc(1, sizeof(*ie));
608	if (ie == NULL((void *)0))
18
←
Assuming 'ie' is equal to NULL→
19
←
Taking true branch→
609		return got_error_from_errno("calloc");
20
←
Returning pointer, which participates in a condition later→
610 
611	err = read_fileindex_val64(&ie->ctime_sec, ctx, infile);
612	if (err)
613		goto done;
614	err = read_fileindex_val64(&ie->ctime_nsec, ctx, infile);
615	if (err)
616		goto done;
617	err = read_fileindex_val64(&ie->mtime_sec, ctx, infile);
618	if (err)
619		goto done;
620	err = read_fileindex_val64(&ie->mtime_nsec, ctx, infile);
621	if (err)
622		goto done;
623 
624	err = read_fileindex_val32(&ie->uid, ctx, infile);
625	if (err)
626		goto done;
627	err = read_fileindex_val32(&ie->gid, ctx, infile);
628	if (err)
629		goto done;
630	err = read_fileindex_val32(&ie->size, ctx, infile);
631	if (err)
632		goto done;
633 
634	err = read_fileindex_val16(&ie->mode, ctx, infile);
635	if (err)
636		goto done;
637 
638	n = fread(ie->blob_sha1, 1, SHA1_DIGEST_LENGTH20, infile);
639	if (n != SHA1_DIGEST_LENGTH20) {
640		err = got_ferror(infile, GOT_ERR_FILEIDX_BAD56);
641		goto done;
642	}
643	SHA1Update(ctx, ie->blob_sha1, SHA1_DIGEST_LENGTH20);
644 
645	n = fread(ie->commit_sha1, 1, SHA1_DIGEST_LENGTH20, infile);
646	if (n != SHA1_DIGEST_LENGTH20) {
647		err = got_ferror(infile, GOT_ERR_FILEIDX_BAD56);
648		goto done;
649	}
650	SHA1Update(ctx, ie->commit_sha1, SHA1_DIGEST_LENGTH20);
651 
652	err = read_fileindex_val32(&ie->flags, ctx, infile);
653	if (err)
654		goto done;
655 
656	err = read_fileindex_path(&ie->path, ctx, infile);
657	if (err)
658		goto done;
659 
660	if (version >= 2) {
661		uint32_t stage = got_fileindex_entry_stage_get(ie);
662		if (stage == GOT_FILEIDX_STAGE_MODIFY1 ||
663		    stage == GOT_FILEIDX_STAGE_ADD2) {
664			n = fread(ie->staged_blob_sha1, 1, SHA1_DIGEST_LENGTH20,
665			    infile);
666			if (n != SHA1_DIGEST_LENGTH20) {
667				err = got_ferror(infile, GOT_ERR_FILEIDX_BAD56);
668				goto done;
669			}
670			SHA1Update(ctx, ie->staged_blob_sha1, SHA1_DIGEST_LENGTH20);
671		}
672	} else {
673		/* GOT_FILE_INDEX_VERSION 1 does not support staging. */
674		ie->flags &= ~GOT_FILEIDX_F_STAGE0x0000f000;
675	}
676 
677done:
678	if (err)
679		got_fileindex_entry_free(ie);
680	else
681		*iep = ie;
682	return err;
683}
684 
685const struct got_error *
686got_fileindex_read(struct got_fileindex *fileindex, FILE *infile)
687{
688	const struct got_error *err = NULL((void *)0);
689	struct got_fileindex_hdr hdr;
690	SHA1_CTX ctx;
691	struct got_fileindex_entry *ie;
692	uint8_t sha1_expected[SHA1_DIGEST_LENGTH20];
693	uint8_t sha1[SHA1_DIGEST_LENGTH20];
694	size_t n;
695	int i;
696 
697	SHA1Init(&ctx);
698 
699	n = fread(&hdr.signature, 1, sizeof(hdr.signature), infile);
700	if (n != sizeof(hdr.signature)) {
1
Assuming the condition is false→
2
←
Taking false branch→
701		if (n == 0) /* EOF */
702			return NULL((void *)0);
703		return got_ferror(infile, GOT_ERR_FILEIDX_BAD56);
704	}
705	n = fread(&hdr.version, 1, sizeof(hdr.version), infile);
706	if (n != sizeof(hdr.version)) {
3
←
Assuming the condition is false→
4
←
Taking false branch→
707		if (n == 0) /* EOF */
708			return NULL((void *)0);
709		return got_ferror(infile, GOT_ERR_FILEIDX_BAD56);
710	}
711	n = fread(&hdr.nentries, 1, sizeof(hdr.nentries), infile);
712	if (n != sizeof(hdr.nentries)) {
5
←
Assuming the condition is false→
6
←
Taking false branch→
713		if (n == 0) /* EOF */
714			return NULL((void *)0);
715		return got_ferror(infile, GOT_ERR_FILEIDX_BAD56);
716	}
717 
718	SHA1Update(&ctx, (uint8_t *)&hdr.signature, sizeof(hdr.signature));
719	SHA1Update(&ctx, (uint8_t *)&hdr.version, sizeof(hdr.version));
720	SHA1Update(&ctx, (uint8_t *)&hdr.nentries, sizeof(hdr.nentries));
721 
722	hdr.signature = be32toh(hdr.signature)(__uint32_t)(__builtin_constant_p(hdr.signature) ? (__uint32_t
)(((__uint32_t)(hdr.signature) & 0xff) << 24 | ((__uint32_t
)(hdr.signature) & 0xff00) << 8 | ((__uint32_t)(hdr
.signature) & 0xff0000) >> 8 | ((__uint32_t)(hdr.signature
) & 0xff000000) >> 24) : __swap32md(hdr.signature));
7
←
'?' condition is false→
723	hdr.version = be32toh(hdr.version)(__uint32_t)(__builtin_constant_p(hdr.version) ? (__uint32_t)
(((__uint32_t)(hdr.version) & 0xff) << 24 | ((__uint32_t
)(hdr.version) & 0xff00) << 8 | ((__uint32_t)(hdr.version
) & 0xff0000) >> 8 | ((__uint32_t)(hdr.version) &
 0xff000000) >> 24) : __swap32md(hdr.version));
8
←
'?' condition is false→
724	hdr.nentries = be32toh(hdr.nentries)(__uint32_t)(__builtin_constant_p(hdr.nentries) ? (__uint32_t
)(((__uint32_t)(hdr.nentries) & 0xff) << 24 | ((__uint32_t
)(hdr.nentries) & 0xff00) << 8 | ((__uint32_t)(hdr.
nentries) & 0xff0000) >> 8 | ((__uint32_t)(hdr.nentries
) & 0xff000000) >> 24) : __swap32md(hdr.nentries));
9
←
'?' condition is false→
725 
726	if (hdr.signature != GOT_FILE_INDEX_SIGNATURE0x676f7449)
10
←
Assuming field 'signature' is equal to GOT_FILE_INDEX_SIGNATURE→
11
←
Taking false branch→
727		return got_error(GOT_ERR_FILEIDX_SIG51);
728	if (hdr.version > GOT_FILE_INDEX_VERSION2)
12
←
Assuming field 'version' is <= GOT_FILE_INDEX_VERSION→
13
←
Taking false branch→
729		return got_error(GOT_ERR_FILEIDX_VER52);
730 
731	for (i = 0; i < hdr.nentries; i++) {
14
←
Assuming 'i' is < field 'nentries'→
15
←
Loop condition is true.  Entering loop body→
732		err = read_fileindex_entry(&ie, &ctx, infile, hdr.version);
16
←
Calling 'read_fileindex_entry'→
21
←
Returning from 'read_fileindex_entry'→
733		if (err)
22
←
Assuming 'err' is null→
23
←
Taking false branch→
734			return err;
735		err = add_entry(fileindex, ie);
24
←
Passing null pointer value via 2nd parameter 'ie'→
25
←
Calling 'add_entry'→
736		if (err)
737			return err;
738	}
739 
740	n = fread(sha1_expected, 1, sizeof(sha1_expected), infile);
741	if (n != sizeof(sha1_expected))
742		return got_ferror(infile, GOT_ERR_FILEIDX_BAD56);
743	SHA1Final(sha1, &ctx);
744	if (memcmp(sha1, sha1_expected, SHA1_DIGEST_LENGTH20) != 0)
745		return got_error(GOT_ERR_FILEIDX_CSUM53);
746 
747	return NULL((void *)0);
748}
749 
750static struct got_fileindex_entry *
751walk_fileindex(struct got_fileindex *fileindex, struct got_fileindex_entry *ie)
752{
753	struct got_fileindex_entry *next;
754 
755	next = RB_NEXT(got_fileindex_tree, &fileindex->entries, ie)got_fileindex_tree_RB_NEXT(ie);
756 
757	/* Skip entries which were added or removed by diff callbacks. */
758	while (next && (next->flags & (GOT_FILEIDX_F_NOT_FLUSHED0x00010000 |
759	    GOT_FILEIDX_F_REMOVE_ON_FLUSH0x00100000)))
760		next = RB_NEXT(got_fileindex_tree, &fileindex->entries, next)got_fileindex_tree_RB_NEXT(next);
761 
762	return next;
763}
764 
765static const struct got_error *
766diff_fileindex_tree(struct got_fileindex *, struct got_fileindex_entry **ie,
767    struct got_tree_object *tree, const char *, const char *,
768    struct got_repository *, struct got_fileindex_diff_tree_cb *, void *);
769 
770static const struct got_error *
771walk_tree(struct got_tree_entry **next, struct got_fileindex *fileindex,
772    struct got_fileindex_entry **ie, struct got_tree_object *tree, int *tidx,
773    const char *path, const char *entry_name, struct got_repository *repo,
774    struct got_fileindex_diff_tree_cb *cb, void *cb_arg)
775{
776	const struct got_error *err = NULL((void *)0);
777	struct got_tree_entry *te = got_object_tree_get_entry(tree, *tidx);
778 
779	if (!got_object_tree_entry_is_submodule(te) &&
780	    S_ISDIR(got_tree_entry_get_mode(te))((got_tree_entry_get_mode(te) & 0170000) == 0040000)) {
781		char *subpath;
782		struct got_tree_object *subtree;
783 
784		if (asprintf(&subpath, "%s%s%s", path,
785		    path[0] == '\0' ? "" : "/",
786		    got_tree_entry_get_name(te)) == -1)
787			return got_error_from_errno("asprintf");
788 
789		err = got_object_open_as_tree(&subtree, repo,
790		    got_tree_entry_get_id(te));
791		if (err) {
792			free(subpath);
793			return err;
794		}
795 
796		err = diff_fileindex_tree(fileindex, ie, subtree, subpath,
797		    entry_name, repo, cb, cb_arg);
798		free(subpath);
799		got_object_tree_close(subtree);
800		if (err)
801			return err;
802	}
803 
804	(*tidx)++;
805	*next = got_object_tree_get_entry(tree, *tidx);
806	return NULL((void *)0);
807}
808 
809static const struct got_error *
810diff_fileindex_tree(struct got_fileindex *fileindex,
811    struct got_fileindex_entry **ie, struct got_tree_object *tree,
812    const char *path, const char *entry_name, struct got_repository *repo,
813    struct got_fileindex_diff_tree_cb *cb, void *cb_arg)
814{
815	const struct got_error *err = NULL((void *)0);
816	struct got_tree_entry *te = NULL((void *)0);
817	size_t path_len = strlen(path);
818	struct got_fileindex_entry *next;
819	int tidx = 0;
820 
821	te = got_object_tree_get_entry(tree, tidx);
822	while ((*ie && got_path_is_child((*ie)->path, path, path_len)) || te) {
823		if (te && *ie) {
824			char *te_path;
825			const char *te_name = got_tree_entry_get_name(te);
826			int cmp;
827			if (asprintf(&te_path, "%s/%s", path, te_name) == -1) {
828				err = got_error_from_errno("asprintf");
829				break;
830			}
831			cmp = got_path_cmp((*ie)->path, te_path,
832			    got_fileindex_entry_path_len(*ie), strlen(te_path));
833			free(te_path);
834			if (cmp == 0) {
835				if (got_path_is_child((*ie)->path, path,
836				    path_len) &&
837				    !got_object_tree_entry_is_submodule(te) &&
838				    (entry_name == NULL((void *)0) ||
839				    strcmp(te_name, entry_name) == 0)) {
840					err = cb->diff_old_new(cb_arg, *ie, te,
841					    path);
842					if (err || entry_name)
843						break;
844				}
845				*ie = walk_fileindex(fileindex, *ie);
846				err = walk_tree(&te, fileindex, ie, tree, &tidx,
847				    path, entry_name, repo, cb, cb_arg);
848			} else if (cmp < 0) {
849				next = walk_fileindex(fileindex, *ie);
850				if (got_path_is_child((*ie)->path, path,
851				    path_len) && entry_name == NULL((void *)0)) {
852					err = cb->diff_old(cb_arg, *ie, path);
853					if (err || entry_name)
854						break;
855				}
856				*ie = next;
857			} else {
858				if ((entry_name == NULL((void *)0) ||
859				    strcmp(te_name, entry_name) == 0)) {
860					err = cb->diff_new(cb_arg, te, path);
861					if (err || entry_name)
862						break;
863				}
864				err = walk_tree(&te, fileindex, ie, tree, &tidx,
865				    path, entry_name, repo, cb, cb_arg);
866			}
867			if (err)
868				break;
869		} else if (*ie) {
870			next = walk_fileindex(fileindex, *ie);
871			if (got_path_is_child((*ie)->path, path, path_len) &&
872			    (entry_name == NULL((void *)0) ||
873			    (te && strcmp(got_tree_entry_get_name(te),
874			    entry_name) == 0))) {
875				err = cb->diff_old(cb_arg, *ie, path);
876				if (err || entry_name)
877					break;
878			}
879			*ie = next;
880		} else if (te) {
881			if (!got_object_tree_entry_is_submodule(te) &&
882			    (entry_name == NULL((void *)0) ||
883			    strcmp(got_tree_entry_get_name(te), entry_name)
884			    == 0)) {
885				err = cb->diff_new(cb_arg, te, path);
886				if (err || entry_name)
887					break;
888			}
889			err = walk_tree(&te, fileindex, ie, tree, &tidx, path,
890			    entry_name, repo, cb, cb_arg);
891			if (err)
892				break;
893		}
894	}
895 
896	return err;
897}
898 
899const struct got_error *
900got_fileindex_diff_tree(struct got_fileindex *fileindex,
901    struct got_tree_object *tree, const char *path, const char *entry_name,
902    struct got_repository *repo,
903    struct got_fileindex_diff_tree_cb *cb, void *cb_arg)
904{
905	struct got_fileindex_entry *ie;
906	ie = RB_MIN(got_fileindex_tree, &fileindex->entries)got_fileindex_tree_RB_MINMAX(&fileindex->entries, -1);
907	while (ie && !got_path_is_child(ie->path, path, strlen(path)))
908		ie = walk_fileindex(fileindex, ie);
909	return diff_fileindex_tree(fileindex, &ie, tree, path, entry_name, repo,
910	    cb, cb_arg);
911}
912 
913static const struct got_error *
914diff_fileindex_dir(struct got_fileindex *, struct got_fileindex_entry **,
915    struct got_pathlist_head *, int, const char *, const char *,
916    struct got_repository *, struct got_fileindex_diff_dir_cb *, void *);
917 
918static const struct got_error *
919read_dirlist(struct got_pathlist_head *dirlist, DIR *dir, const char *path)
920{
921	const struct got_error *err = NULL((void *)0);
922	struct got_pathlist_entry *new = NULL((void *)0);
923	struct dirent *dep = NULL((void *)0);
924	struct dirent *de = NULL((void *)0);
925 
926	for (;;) {
927		de = malloc(sizeof(struct dirent) + NAME_MAX255 + 1);
928		if (de == NULL((void *)0)) {
929			err = got_error_from_errno("malloc");
930			break;
931		}
932 
933		if (readdir_r(dir, de, &dep) != 0) {
934			err = got_error_from_errno("readdir_r");
935			free(de);
936			break;
937		}
938		if (dep == NULL((void *)0)) {
939			free(de);
940			break;
941		}
942 
943		if (strcmp(de->d_name, ".") == 0 ||
944		    strcmp(de->d_name, "..") == 0 ||
945		    (path[0] == '\0' &&
946		    strcmp(de->d_name, GOT_WORKTREE_GOT_DIR".got") == 0)) {
947			free(de);
948			continue;
949		}
950 
951		err = got_pathlist_insert(&new, dirlist, de->d_name, de);
952		if (err) {
953			free(de);
954			break;
955		}
956		if (new == NULL((void *)0)) {
957			err = got_error(GOT_ERR_DIR_DUP_ENTRY59);
958			free(de);
959			break;
960		}
961	}
962 
963	return err;
964}
965 
966void
967free_dirlist(struct got_pathlist_head *dirlist)
968{
969	struct got_pathlist_entry *dle;
970 
971	TAILQ_FOREACH(dle, dirlist, entry)for((dle) = ((dirlist)->tqh_first); (dle) != ((void *)0); (
dle) = ((dle)->entry.tqe_next))
972		free(dle->data);
973	got_pathlist_free(dirlist);
974}
975 
976static const struct got_error *
977walk_dir(struct got_pathlist_entry **next, struct got_fileindex *fileindex,
978    struct got_fileindex_entry **ie, struct got_pathlist_entry *dle, int fd,
979    const char *path, const char *rootpath, struct got_repository *repo,
980    struct got_fileindex_diff_dir_cb *cb, void *cb_arg)
981{
982	const struct got_error *err = NULL((void *)0);
983	struct dirent *de = dle->data;
984	DIR *subdir = NULL((void *)0);
985	int subdirfd = -1;
986	int type;
987 
988	*next = NULL((void *)0);
989 
990	if (de->d_type == DT_UNKNOWN0) {
991		/* Occurs on NFS mounts without "readdir plus" RPC. */
992		char *dir_path;
993		if (asprintf(&dir_path, "%s/%s", rootpath, path) == -1)
994			return got_error_from_errno("asprintf");
995		err = got_path_dirent_type(&type, dir_path, de);
996		free(dir_path);
997		if (err)
998			return err;
999	} else
1000		type = de->d_type;
1001 
1002	if (type == DT_DIR4) {
1003		char *subpath;
1004		char *subdirpath;
1005		struct got_pathlist_head subdirlist;
1006 
1007		TAILQ_INIT(&subdirlist)do { (&subdirlist)->tqh_first = ((void *)0); (&subdirlist
)->tqh_last = &(&subdirlist)->tqh_first; } while
 (0);
1008 
1009		if (asprintf(&subpath, "%s%s%s", path,
1010		    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1011			return got_error_from_errno("asprintf");
1012 
1013		if (asprintf(&subdirpath, "%s/%s", rootpath, subpath) == -1) {
1014			free(subpath);
1015			return got_error_from_errno("asprintf");
1016		}
1017 
1018		subdirfd = openat(fd, de->d_name,
1019		    O_RDONLY0x0000 | O_NOFOLLOW0x0100 | O_DIRECTORY0x20000);
1020		if (subdirfd == -1) {
1021			if (errno(*__errno()) == EACCES13) {
1022				*next = TAILQ_NEXT(dle, entry)((dle)->entry.tqe_next);
1023				return NULL((void *)0);
1024			}
1025			err = got_error_from_errno2("openat", subdirpath);
1026			free(subpath);
1027			free(subdirpath);
1028			return err;
1029		}
1030 
1031		subdir = fdopendir(subdirfd);
1032		if (subdir == NULL((void *)0))
1033			return got_error_from_errno2("fdopendir", path);
1034		subdirfd = -1;
1035		err = read_dirlist(&subdirlist, subdir, subdirpath);
1036		if (err) {
1037			free(subpath);
1038			free(subdirpath);
1039			closedir(subdir);
1040			return err;
1041		}
1042		err = diff_fileindex_dir(fileindex, ie, &subdirlist,
1043		    dirfd(subdir), rootpath, subpath, repo, cb, cb_arg);
1044		if (subdir && closedir(subdir) == -1 && err == NULL((void *)0))
1045			err = got_error_from_errno2("closedir", subdirpath);
1046		free(subpath);
1047		free(subdirpath);
1048		free_dirlist(&subdirlist);
1049		if (err)
1050			return err;
1051	}
1052 
1053	*next = TAILQ_NEXT(dle, entry)((dle)->entry.tqe_next);
1054	return NULL((void *)0);
1055}
1056 
1057static const struct got_error *
1058diff_fileindex_dir(struct got_fileindex *fileindex,
1059    struct got_fileindex_entry **ie, struct got_pathlist_head *dirlist,
1060    int dirfd, const char *rootpath, const char *path,
1061    struct got_repository *repo,
1062    struct got_fileindex_diff_dir_cb *cb, void *cb_arg)
1063{
1064	const struct got_error *err = NULL((void *)0);
1065	struct dirent *de = NULL((void *)0);
1066	size_t path_len = strlen(path);
1067	struct got_pathlist_entry *dle;
1068 
1069	if (cb->diff_traverse) {
1070		err = cb->diff_traverse(cb_arg, path, dirfd);
1071		if (err)
1072			return err;
1073	}
1074 
1075	dle = TAILQ_FIRST(dirlist)((dirlist)->tqh_first);
1076	while ((*ie && got_path_is_child((*ie)->path, path, path_len)) || dle) {
1077		if (dle && *ie) {
1078			char *de_path;
1079			int cmp;
1080			de = dle->data;
1081			if (asprintf(&de_path, "%s/%s", path,
1082			    de->d_name) == -1) {
1083				err = got_error_from_errno("asprintf");
1084				break;
1085			}
1086			cmp = got_path_cmp((*ie)->path, de_path,
1087			    got_fileindex_entry_path_len(*ie),
1088			    strlen(path) + 1 + de->d_namlen);
1089			free(de_path);
1090			if (cmp == 0) {
1091				err = cb->diff_old_new(cb_arg, *ie, de, path,
1092				    dirfd);
1093				if (err)
1094					break;
1095				*ie = walk_fileindex(fileindex, *ie);
1096				err = walk_dir(&dle, fileindex, ie, dle, dirfd,
1097				    path, rootpath, repo, cb, cb_arg);
1098			} else if (cmp < 0 ) {
1099				err = cb->diff_old(cb_arg, *ie, path);
1100				if (err)
1101					break;
1102				*ie = walk_fileindex(fileindex, *ie);
1103			} else {
1104				err = cb->diff_new(cb_arg, de, path, dirfd);
1105				if (err)
1106					break;
1107				err = walk_dir(&dle, fileindex, ie, dle, dirfd,
1108				    path, rootpath, repo, cb, cb_arg);
1109			}
1110			if (err)
1111				break;
1112		} else if (*ie) {
1113			err = cb->diff_old(cb_arg, *ie, path);
1114			if (err)
1115				break;
1116			*ie = walk_fileindex(fileindex, *ie);
1117		} else if (dle) {
1118			de = dle->data;
1119			err = cb->diff_new(cb_arg, de, path, dirfd);
1120			if (err)
1121				break;
1122			err = walk_dir(&dle, fileindex, ie, dle, dirfd, path,
1123			    rootpath, repo, cb, cb_arg);
1124			if (err)
1125				break;
1126		}
1127	}
1128 
1129	return err;
1130}
1131 
1132const struct got_error *
1133got_fileindex_diff_dir(struct got_fileindex *fileindex, int fd,
1134    const char *rootpath, const char *path, struct got_repository *repo,
1135    struct got_fileindex_diff_dir_cb *cb, void *cb_arg)
1136{
1137	const struct got_error *err;
1138	struct got_fileindex_entry *ie;
1139	struct got_pathlist_head dirlist;
1140	int fd2;
1141	DIR *dir;
1142 
1143	TAILQ_INIT(&dirlist)do { (&dirlist)->tqh_first = ((void *)0); (&dirlist
)->tqh_last = &(&dirlist)->tqh_first; } while (
0);
1144 
1145	/* 
1146	 * Duplicate the file descriptor so we can call closedir() below
1147	 * without closing the file descriptor passed in by our caller.
1148	 */
1149	fd2 = dup(fd);
1150	if (fd2 == -1)
1151		return got_error_from_errno2("dup", path);
1152	if (lseek(fd2, 0, SEEK_SET0) == -1) {
1153		err = got_error_from_errno2("lseek", path);
1154		close(fd2);
1155		return err;
1156	}
1157	dir = fdopendir(fd2);
1158	if (dir == NULL((void *)0)) {
1159		err = got_error_from_errno2("fdopendir", path);
1160		close(fd2);
1161		return err;
1162	}
1163	err = read_dirlist(&dirlist, dir, path);
1164	if (err) {
1165		closedir(dir);
1166		return err;
1167	}
1168 
1169	ie = RB_MIN(got_fileindex_tree, &fileindex->entries)got_fileindex_tree_RB_MINMAX(&fileindex->entries, -1);
1170	while (ie && !got_path_is_child(ie->path, path, strlen(path)))
1171		ie = walk_fileindex(fileindex, ie);
1172	err = diff_fileindex_dir(fileindex, &ie, &dirlist, dirfd(dir),
1173	    rootpath, path, repo, cb, cb_arg);
1174 
1175	if (closedir(dir) == -1 && err == NULL((void *)0))
1176		err = got_error_from_errno2("closedir", path);
1177	free_dirlist(&dirlist);
1178	return err;
1179}
1180 
1181RB_GENERATE(got_fileindex_tree, got_fileindex_entry, entry, got_fileindex_cmp)void got_fileindex_tree_RB_INSERT_COLOR(struct got_fileindex_tree
 *head, struct got_fileindex_entry *elm) { struct got_fileindex_entry
 *parent, *gparent, *tmp; while ((parent = (elm)->entry.rbe_parent
) && (parent)->entry.rbe_color == 1) { gparent = (
parent)->entry.rbe_parent; if (parent == (gparent)->entry
.rbe_left) { tmp = (gparent)->entry.rbe_right; if (tmp &&
 (tmp)->entry.rbe_color == 1) { (tmp)->entry.rbe_color =
 0; do { (parent)->entry.rbe_color = 0; (gparent)->entry
.rbe_color = 1; } while (0); elm = gparent; continue; } if ((
parent)->entry.rbe_right == elm) { do { (tmp) = (parent)->
entry.rbe_right; if (((parent)->entry.rbe_right = (tmp)->
entry.rbe_left)) { ((tmp)->entry.rbe_left)->entry.rbe_parent
 = (parent); } do {} while (0); if (((tmp)->entry.rbe_parent
 = (parent)->entry.rbe_parent)) { if ((parent) == ((parent
)->entry.rbe_parent)->entry.rbe_left) ((parent)->entry
.rbe_parent)->entry.rbe_left = (tmp); else ((parent)->entry
.rbe_parent)->entry.rbe_right = (tmp); } else (head)->rbh_root
 = (tmp); (tmp)->entry.rbe_left = (parent); (parent)->entry
.rbe_parent = (tmp); do {} while (0); if (((tmp)->entry.rbe_parent
)) do {} while (0); } while (0); tmp = parent; parent = elm; elm
 = tmp; } do { (parent)->entry.rbe_color = 0; (gparent)->
entry.rbe_color = 1; } while (0); do { (tmp) = (gparent)->
entry.rbe_left; if (((gparent)->entry.rbe_left = (tmp)->
entry.rbe_right)) { ((tmp)->entry.rbe_right)->entry.rbe_parent
 = (gparent); } do {} while (0); if (((tmp)->entry.rbe_parent
 = (gparent)->entry.rbe_parent)) { if ((gparent) == ((gparent
)->entry.rbe_parent)->entry.rbe_left) ((gparent)->entry
.rbe_parent)->entry.rbe_left = (tmp); else ((gparent)->
entry.rbe_parent)->entry.rbe_right = (tmp); } else (head)->
rbh_root = (tmp); (tmp)->entry.rbe_right = (gparent); (gparent
)->entry.rbe_parent = (tmp); do {} while (0); if (((tmp)->
entry.rbe_parent)) do {} while (0); } while (0); } else { tmp
 = (gparent)->entry.rbe_left; if (tmp && (tmp)->
entry.rbe_color == 1) { (tmp)->entry.rbe_color = 0; do { (
parent)->entry.rbe_color = 0; (gparent)->entry.rbe_color
 = 1; } while (0); elm = gparent; continue; } if ((parent)->
entry.rbe_left == elm) { do { (tmp) = (parent)->entry.rbe_left
; if (((parent)->entry.rbe_left = (tmp)->entry.rbe_right
)) { ((tmp)->entry.rbe_right)->entry.rbe_parent = (parent
); } do {} while (0); if (((tmp)->entry.rbe_parent = (parent
)->entry.rbe_parent)) { if ((parent) == ((parent)->entry
.rbe_parent)->entry.rbe_left) ((parent)->entry.rbe_parent
)->entry.rbe_left = (tmp); else ((parent)->entry.rbe_parent
)->entry.rbe_right = (tmp); } else (head)->rbh_root = (
tmp); (tmp)->entry.rbe_right = (parent); (parent)->entry
.rbe_parent = (tmp); do {} while (0); if (((tmp)->entry.rbe_parent
)) do {} while (0); } while (0); tmp = parent; parent = elm; elm
 = tmp; } do { (parent)->entry.rbe_color = 0; (gparent)->
entry.rbe_color = 1; } while (0); do { (tmp) = (gparent)->
entry.rbe_right; if (((gparent)->entry.rbe_right = (tmp)->
entry.rbe_left)) { ((tmp)->entry.rbe_left)->entry.rbe_parent
 = (gparent); } do {} while (0); if (((tmp)->entry.rbe_parent
 = (gparent)->entry.rbe_parent)) { if ((gparent) == ((gparent
)->entry.rbe_parent)->entry.rbe_left) ((gparent)->entry
.rbe_parent)->entry.rbe_left = (tmp); else ((gparent)->
entry.rbe_parent)->entry.rbe_right = (tmp); } else (head)->
rbh_root = (tmp); (tmp)->entry.rbe_left = (gparent); (gparent
)->entry.rbe_parent = (tmp); do {} while (0); if (((tmp)->
entry.rbe_parent)) do {} while (0); } while (0); } } (head->
rbh_root)->entry.rbe_color = 0; } void got_fileindex_tree_RB_REMOVE_COLOR
(struct got_fileindex_tree *head, struct got_fileindex_entry *
parent, struct got_fileindex_entry *elm) { struct got_fileindex_entry
 *tmp; while ((elm == ((void *)0) || (elm)->entry.rbe_color
 == 0) && elm != (head)->rbh_root) { if ((parent)->
entry.rbe_left == elm) { tmp = (parent)->entry.rbe_right; if
 ((tmp)->entry.rbe_color == 1) { do { (tmp)->entry.rbe_color
 = 0; (parent)->entry.rbe_color = 1; } while (0); do { (tmp
) = (parent)->entry.rbe_right; if (((parent)->entry.rbe_right
 = (tmp)->entry.rbe_left)) { ((tmp)->entry.rbe_left)->
entry.rbe_parent = (parent); } do {} while (0); if (((tmp)->
entry.rbe_parent = (parent)->entry.rbe_parent)) { if ((parent
) == ((parent)->entry.rbe_parent)->entry.rbe_left) ((parent
)->entry.rbe_parent)->entry.rbe_left = (tmp); else ((parent
)->entry.rbe_parent)->entry.rbe_right = (tmp); } else (
head)->rbh_root = (tmp); (tmp)->entry.rbe_left = (parent
); (parent)->entry.rbe_parent = (tmp); do {} while (0); if
 (((tmp)->entry.rbe_parent)) do {} while (0); } while (0);
 tmp = (parent)->entry.rbe_right; } if (((tmp)->entry.rbe_left
 == ((void *)0) || ((tmp)->entry.rbe_left)->entry.rbe_color
 == 0) && ((tmp)->entry.rbe_right == ((void *)0) ||
 ((tmp)->entry.rbe_right)->entry.rbe_color == 0)) { (tmp
)->entry.rbe_color = 1; elm = parent; parent = (elm)->entry
.rbe_parent; } else { if ((tmp)->entry.rbe_right == ((void
 *)0) || ((tmp)->entry.rbe_right)->entry.rbe_color == 0
) { struct got_fileindex_entry *oleft; if ((oleft = (tmp)->
entry.rbe_left)) (oleft)->entry.rbe_color = 0; (tmp)->entry
.rbe_color = 1; do { (oleft) = (tmp)->entry.rbe_left; if (
((tmp)->entry.rbe_left = (oleft)->entry.rbe_right)) { (
(oleft)->entry.rbe_right)->entry.rbe_parent = (tmp); } do
 {} while (0); if (((oleft)->entry.rbe_parent = (tmp)->
entry.rbe_parent)) { if ((tmp) == ((tmp)->entry.rbe_parent
)->entry.rbe_left) ((tmp)->entry.rbe_parent)->entry.
rbe_left = (oleft); else ((tmp)->entry.rbe_parent)->entry
.rbe_right = (oleft); } else (head)->rbh_root = (oleft); (
oleft)->entry.rbe_right = (tmp); (tmp)->entry.rbe_parent
 = (oleft); do {} while (0); if (((oleft)->entry.rbe_parent
)) do {} while (0); } while (0); tmp = (parent)->entry.rbe_right
; } (tmp)->entry.rbe_color = (parent)->entry.rbe_color;
 (parent)->entry.rbe_color = 0; if ((tmp)->entry.rbe_right
) ((tmp)->entry.rbe_right)->entry.rbe_color = 0; do { (
tmp) = (parent)->entry.rbe_right; if (((parent)->entry.
rbe_right = (tmp)->entry.rbe_left)) { ((tmp)->entry.rbe_left
)->entry.rbe_parent = (parent); } do {} while (0); if (((tmp
)->entry.rbe_parent = (parent)->entry.rbe_parent)) { if
 ((parent) == ((parent)->entry.rbe_parent)->entry.rbe_left
) ((parent)->entry.rbe_parent)->entry.rbe_left = (tmp);
 else ((parent)->entry.rbe_parent)->entry.rbe_right = (
tmp); } else (head)->rbh_root = (tmp); (tmp)->entry.rbe_left
 = (parent); (parent)->entry.rbe_parent = (tmp); do {} while
 (0); if (((tmp)->entry.rbe_parent)) do {} while (0); } while
 (0); elm = (head)->rbh_root; break; } } else { tmp = (parent
)->entry.rbe_left; if ((tmp)->entry.rbe_color == 1) { do
 { (tmp)->entry.rbe_color = 0; (parent)->entry.rbe_color
 = 1; } while (0); do { (tmp) = (parent)->entry.rbe_left; if
 (((parent)->entry.rbe_left = (tmp)->entry.rbe_right)) {
 ((tmp)->entry.rbe_right)->entry.rbe_parent = (parent);
 } do {} while (0); if (((tmp)->entry.rbe_parent = (parent
)->entry.rbe_parent)) { if ((parent) == ((parent)->entry
.rbe_parent)->entry.rbe_left) ((parent)->entry.rbe_parent
)->entry.rbe_left = (tmp); else ((parent)->entry.rbe_parent
)->entry.rbe_right = (tmp); } else (head)->rbh_root = (
tmp); (tmp)->entry.rbe_right = (parent); (parent)->entry
.rbe_parent = (tmp); do {} while (0); if (((tmp)->entry.rbe_parent
)) do {} while (0); } while (0); tmp = (parent)->entry.rbe_left
; } if (((tmp)->entry.rbe_left == ((void *)0) || ((tmp)->
entry.rbe_left)->entry.rbe_color == 0) && ((tmp)->
entry.rbe_right == ((void *)0) || ((tmp)->entry.rbe_right)
->entry.rbe_color == 0)) { (tmp)->entry.rbe_color = 1; elm
 = parent; parent = (elm)->entry.rbe_parent; } else { if (
(tmp)->entry.rbe_left == ((void *)0) || ((tmp)->entry.rbe_left
)->entry.rbe_color == 0) { struct got_fileindex_entry *oright
; if ((oright = (tmp)->entry.rbe_right)) (oright)->entry
.rbe_color = 0; (tmp)->entry.rbe_color = 1; do { (oright) =
 (tmp)->entry.rbe_right; if (((tmp)->entry.rbe_right = (
oright)->entry.rbe_left)) { ((oright)->entry.rbe_left)->
entry.rbe_parent = (tmp); } do {} while (0); if (((oright)->
entry.rbe_parent = (tmp)->entry.rbe_parent)) { if ((tmp) ==
 ((tmp)->entry.rbe_parent)->entry.rbe_left) ((tmp)->
entry.rbe_parent)->entry.rbe_left = (oright); else ((tmp)->
entry.rbe_parent)->entry.rbe_right = (oright); } else (head
)->rbh_root = (oright); (oright)->entry.rbe_left = (tmp
); (tmp)->entry.rbe_parent = (oright); do {} while (0); if
 (((oright)->entry.rbe_parent)) do {} while (0); } while (
0); tmp = (parent)->entry.rbe_left; } (tmp)->entry.rbe_color
 = (parent)->entry.rbe_color; (parent)->entry.rbe_color
 = 0; if ((tmp)->entry.rbe_left) ((tmp)->entry.rbe_left
)->entry.rbe_color = 0; do { (tmp) = (parent)->entry.rbe_left
; if (((parent)->entry.rbe_left = (tmp)->entry.rbe_right
)) { ((tmp)->entry.rbe_right)->entry.rbe_parent = (parent
); } do {} while (0); if (((tmp)->entry.rbe_parent = (parent
)->entry.rbe_parent)) { if ((parent) == ((parent)->entry
.rbe_parent)->entry.rbe_left) ((parent)->entry.rbe_parent
)->entry.rbe_left = (tmp); else ((parent)->entry.rbe_parent
)->entry.rbe_right = (tmp); } else (head)->rbh_root = (
tmp); (tmp)->entry.rbe_right = (parent); (parent)->entry
.rbe_parent = (tmp); do {} while (0); if (((tmp)->entry.rbe_parent
)) do {} while (0); } while (0); elm = (head)->rbh_root; break
; } } } if (elm) (elm)->entry.rbe_color = 0; } struct got_fileindex_entry
 * got_fileindex_tree_RB_REMOVE(struct got_fileindex_tree *head
, struct got_fileindex_entry *elm) { struct got_fileindex_entry
 *child, *parent, *old = elm; int color; if ((elm)->entry.
rbe_left == ((void *)0)) child = (elm)->entry.rbe_right; else
 if ((elm)->entry.rbe_right == ((void *)0)) child = (elm)->
entry.rbe_left; else { struct got_fileindex_entry *left; elm =
 (elm)->entry.rbe_right; while ((left = (elm)->entry.rbe_left
)) elm = left; child = (elm)->entry.rbe_right; parent = (elm
)->entry.rbe_parent; color = (elm)->entry.rbe_color; if
 (child) (child)->entry.rbe_parent = parent; if (parent) {
 if ((parent)->entry.rbe_left == elm) (parent)->entry.rbe_left
 = child; else (parent)->entry.rbe_right = child; do {} while
 (0); } else (head)->rbh_root = child; if ((elm)->entry
.rbe_parent == old) parent = elm; (elm)->entry = (old)->
entry; if ((old)->entry.rbe_parent) { if (((old)->entry
.rbe_parent)->entry.rbe_left == old) ((old)->entry.rbe_parent
)->entry.rbe_left = elm; else ((old)->entry.rbe_parent)
->entry.rbe_right = elm; do {} while (0); } else (head)->
rbh_root = elm; ((old)->entry.rbe_left)->entry.rbe_parent
 = elm; if ((old)->entry.rbe_right) ((old)->entry.rbe_right
)->entry.rbe_parent = elm; if (parent) { left = parent; do
 { do {} while (0); } while ((left = (left)->entry.rbe_parent
)); } goto color; } parent = (elm)->entry.rbe_parent; color
 = (elm)->entry.rbe_color; if (child) (child)->entry.rbe_parent
 = parent; if (parent) { if ((parent)->entry.rbe_left == elm
) (parent)->entry.rbe_left = child; else (parent)->entry
.rbe_right = child; do {} while (0); } else (head)->rbh_root
 = child; color: if (color == 0) got_fileindex_tree_RB_REMOVE_COLOR
(head, parent, child); return (old); } struct got_fileindex_entry
 * got_fileindex_tree_RB_INSERT(struct got_fileindex_tree *head
, struct got_fileindex_entry *elm) { struct got_fileindex_entry
 *tmp; struct got_fileindex_entry *parent = ((void *)0); int comp
 = 0; tmp = (head)->rbh_root; while (tmp) { parent = tmp; comp
 = (got_fileindex_cmp)(elm, parent); if (comp < 0) tmp = (
tmp)->entry.rbe_left; else if (comp > 0) tmp = (tmp)->
entry.rbe_right; else return (tmp); } do { (elm)->entry.rbe_parent
 = parent; (elm)->entry.rbe_left = (elm)->entry.rbe_right
 = ((void *)0); (elm)->entry.rbe_color = 1; } while (0); if
 (parent != ((void *)0)) { if (comp < 0) (parent)->entry
.rbe_left = elm; else (parent)->entry.rbe_right = elm; do {
} while (0); } else (head)->rbh_root = elm; got_fileindex_tree_RB_INSERT_COLOR
(head, elm); return (((void *)0)); } struct got_fileindex_entry
 * got_fileindex_tree_RB_FIND(struct got_fileindex_tree *head
, struct got_fileindex_entry *elm) { struct got_fileindex_entry
 *tmp = (head)->rbh_root; int comp; while (tmp) { comp = got_fileindex_cmp
(elm, tmp); if (comp < 0) tmp = (tmp)->entry.rbe_left; else
 if (comp > 0) tmp = (tmp)->entry.rbe_right; else return
 (tmp); } return (((void *)0)); } struct got_fileindex_entry *
 got_fileindex_tree_RB_NFIND(struct got_fileindex_tree *head,
 struct got_fileindex_entry *elm) { struct got_fileindex_entry
 *tmp = (head)->rbh_root; struct got_fileindex_entry *res =
 ((void *)0); int comp; while (tmp) { comp = got_fileindex_cmp
(elm, tmp); if (comp < 0) { res = tmp; tmp = (tmp)->entry
.rbe_left; } else if (comp > 0) tmp = (tmp)->entry.rbe_right
; else return (tmp); } return (res); } struct got_fileindex_entry
 * got_fileindex_tree_RB_NEXT(struct got_fileindex_entry *elm
) { if ((elm)->entry.rbe_right) { elm = (elm)->entry.rbe_right
; while ((elm)->entry.rbe_left) elm = (elm)->entry.rbe_left
; } else { if ((elm)->entry.rbe_parent && (elm == (
(elm)->entry.rbe_parent)->entry.rbe_left)) elm = (elm)->
entry.rbe_parent; else { while ((elm)->entry.rbe_parent &&
 (elm == ((elm)->entry.rbe_parent)->entry.rbe_right)) elm
 = (elm)->entry.rbe_parent; elm = (elm)->entry.rbe_parent
; } } return (elm); } struct got_fileindex_entry * got_fileindex_tree_RB_PREV
(struct got_fileindex_entry *elm) { if ((elm)->entry.rbe_left
) { elm = (elm)->entry.rbe_left; while ((elm)->entry.rbe_right
) elm = (elm)->entry.rbe_right; } else { if ((elm)->entry
.rbe_parent && (elm == ((elm)->entry.rbe_parent)->
entry.rbe_right)) elm = (elm)->entry.rbe_parent; else { while
 ((elm)->entry.rbe_parent && (elm == ((elm)->entry
.rbe_parent)->entry.rbe_left)) elm = (elm)->entry.rbe_parent
; elm = (elm)->entry.rbe_parent; } } return (elm); } struct
 got_fileindex_entry * got_fileindex_tree_RB_MINMAX(struct got_fileindex_tree
 *head, int val) { struct got_fileindex_entry *tmp = (head)->
rbh_root; struct got_fileindex_entry *parent = ((void *)0); while
 (tmp) { parent = tmp; if (val < 0) tmp = (tmp)->entry.
rbe_left; else tmp = (tmp)->entry.rbe_right; } return (parent
); };
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Loop condition is false. Execution continues on line 1181→
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Dereference of null pointer