Bug Summary

File:tog/../lib/reference.c
Warning:line 591, column 6
Access to field 'flags' results in a dereference of a null pointer (loaded from variable 'nextref')

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 reference.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/tog/../include -I /home/ben/Projects/got/tog/../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/tog/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/tog/../lib/reference.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/types.h>
18#include <sys/queue.h>
19#include <sys/stat.h>
20
21#include <errno(*__errno()).h>
22#include <ctype.h>
23#include <dirent.h>
24#include <limits.h>
25#include <sha1.h>
26#include <stdio.h>
27#include <stdlib.h>
28#include <string.h>
29#include <unistd.h>
30#include <util.h>
31#include <zlib.h>
32#include <time.h>
33#include <libgen.h>
34
35#include "got_error.h"
36#include "got_object.h"
37#include "got_repository.h"
38#include "got_reference.h"
39#include "got_opentemp.h"
40#include "got_path.h"
41
42#include "got_lib_sha1.h"
43#include "got_lib_delta.h"
44#include "got_lib_inflate.h"
45#include "got_lib_object.h"
46#include "got_lib_object_idset.h"
47#include "got_lib_lockfile.h"
48
49#ifndef nitems
50#define nitems(_a)(sizeof(_a) / sizeof((_a)[0])) (sizeof(_a) / sizeof((_a)[0]))
51#endif
52
53#define GOT_REF_HEADS"heads" "heads"
54#define GOT_REF_TAGS"tags" "tags"
55#define GOT_REF_REMOTES"remotes" "remotes"
56
57/*
58 * We do not resolve tags yet, and don't yet care about sorting refs either,
59 * so packed-refs files we write contain a minimal header which disables all
60 * packed-refs "traits" supported by Git.
61 */
62#define GOT_PACKED_REFS_HEADER"# pack-refs with:" "# pack-refs with:"
63
64/* A symbolic reference. */
65struct got_symref {
66 char *name;
67 char *ref;
68};
69
70#define GOT_REF_RECURSE_MAX20 20
71
72/* A non-symbolic reference (there is no better designation). */
73struct got_ref {
74 char *name;
75 u_int8_t sha1[SHA1_DIGEST_LENGTH20];
76};
77
78/* A reference which points to an arbitrary object. */
79struct got_reference {
80 unsigned int flags;
81#define GOT_REF_IS_SYMBOLIC0x01 0x01
82#define GOT_REF_IS_PACKED0x02 0x02
83
84 union {
85 struct got_ref ref;
86 struct got_symref symref;
87 } ref;
88
89 struct got_lockfile *lf;
90};
91
92static const struct got_error *
93alloc_ref(struct got_reference **ref, const char *name,
94 struct got_object_id *id, int flags)
95{
96 const struct got_error *err = NULL((void *)0);
97
98 *ref = calloc(1, sizeof(**ref));
99 if (*ref == NULL((void *)0))
100 return got_error_from_errno("calloc");
101
102 memcpy((*ref)->ref.ref.sha1, id->sha1, sizeof((*ref)->ref.ref.sha1));
103 (*ref)->flags = flags;
104 (*ref)->ref.ref.name = strdup(name);
105 if ((*ref)->ref.ref.name == NULL((void *)0)) {
106 err = got_error_from_errno("strdup");
107 got_ref_close(*ref);
108 *ref = NULL((void *)0);
109 }
110 return err;
111}
112
113static const struct got_error *
114alloc_symref(struct got_reference **ref, const char *name,
115 const char *target_ref, int flags)
116{
117 const struct got_error *err = NULL((void *)0);
118
119 *ref = calloc(1, sizeof(**ref));
120 if (*ref == NULL((void *)0))
121 return got_error_from_errno("calloc");
122
123 (*ref)->flags = GOT_REF_IS_SYMBOLIC0x01 | flags;
124 (*ref)->ref.symref.name = strdup(name);
125 if ((*ref)->ref.symref.name == NULL((void *)0)) {
126 err = got_error_from_errno("strdup");
127 got_ref_close(*ref);
128 *ref = NULL((void *)0);
129 return err;
130 }
131 (*ref)->ref.symref.ref = strdup(target_ref);
132 if ((*ref)->ref.symref.ref == NULL((void *)0)) {
133 err = got_error_from_errno("strdup");
134 got_ref_close(*ref);
135 *ref = NULL((void *)0);
136 }
137 return err;
138}
139
140static const struct got_error *
141parse_symref(struct got_reference **ref, const char *name, const char *line)
142{
143 if (line[0] == '\0')
144 return got_error(GOT_ERR_BAD_REF_DATA57);
145
146 return alloc_symref(ref, name, line, 0);
147}
148
149static const struct got_error *
150parse_ref_line(struct got_reference **ref, const char *name, const char *line)
151{
152 struct got_object_id id;
153
154 if (strncmp(line, "ref: ", 5) == 0) {
155 line += 5;
156 return parse_symref(ref, name, line);
157 }
158
159 if (!got_parse_sha1_digest(id.sha1, line))
160 return got_error(GOT_ERR_BAD_REF_DATA57);
161
162 return alloc_ref(ref, name, &id, 0);
163}
164
165static const struct got_error *
166parse_ref_file(struct got_reference **ref, const char *name,
167 const char *absname, const char *abspath, int lock)
168{
169 const struct got_error *err = NULL((void *)0);
170 FILE *f;
171 char *line = NULL((void *)0);
172 size_t linesize = 0;
173 ssize_t linelen;
174 struct got_lockfile *lf = NULL((void *)0);
175
176 if (lock) {
177 err = got_lockfile_lock(&lf, abspath);
178 if (err) {
179 if (err->code == GOT_ERR_ERRNO1 && errno(*__errno()) == ENOENT2)
180 err = got_error_not_ref(name);
181 return err;
182 }
183 }
184
185 f = fopen(abspath, "rb");
186 if (f == NULL((void *)0)) {
187 if (errno(*__errno()) != ENOTDIR20 && errno(*__errno()) != ENOENT2)
188 err = got_error_from_errno2("fopen", abspath);
189 else
190 err = got_error_not_ref(name);
191 if (lock)
192 got_lockfile_unlock(lf);
193 return err;
194 }
195
196 linelen = getline(&line, &linesize, f);
197 if (linelen == -1) {
198 if (feof(f)(!__isthreaded ? (((f)->_flags & 0x0020) != 0) : (feof
)(f)))
199 err = NULL((void *)0); /* ignore empty files (could be locks) */
200 else {
201 if (errno(*__errno()) == EISDIR21)
202 err = got_error(GOT_ERR_NOT_REF5);
203 else if (ferror(f)(!__isthreaded ? (((f)->_flags & 0x0040) != 0) : (ferror
)(f)))
204 err = got_ferror(f, GOT_ERR_IO6);
205 else
206 err = got_error_from_errno2("getline", abspath);
207 }
208 if (lock)
209 got_lockfile_unlock(lf);
210 goto done;
211 }
212 while (linelen > 0 && line[linelen - 1] == '\n') {
213 line[linelen - 1] = '\0';
214 linelen--;
215 }
216
217 err = parse_ref_line(ref, absname, line);
218 if (lock) {
219 if (err)
220 got_lockfile_unlock(lf);
221 else {
222 if (*ref)
223 (*ref)->lf = lf;
224 else
225 got_lockfile_unlock(lf);
226 }
227 }
228done:
229 free(line);
230 if (fclose(f) == EOF(-1) && err == NULL((void *)0)) {
231 err = got_error_from_errno("fclose");
232 if (*ref) {
233 if (lock)
234 got_ref_unlock(*ref);
235 got_ref_close(*ref);
236 *ref = NULL((void *)0);
237 }
238 }
239 return err;
240}
241
242static int
243is_well_known_ref(const char *refname)
244{
245 return (strcmp(refname, GOT_REF_HEAD"HEAD") == 0 ||
246 strcmp(refname, GOT_REF_ORIG_HEAD"ORIG_HEAD") == 0 ||
247 strcmp(refname, GOT_REF_MERGE_HEAD"MERGE_HEAD") == 0 ||
248 strcmp(refname, GOT_REF_FETCH_HEAD"FETCH_HEAD") == 0);
249}
250
251static char *
252get_refs_dir_path(struct got_repository *repo, const char *refname)
253{
254 if (is_well_known_ref(refname) || strncmp(refname, "refs/", 5) == 0)
255 return strdup(got_repo_get_path_git_dir(repo));
256
257 return got_repo_get_path_refs(repo);
258}
259
260static int
261is_valid_ref_name(const char *name)
262{
263 const char *s, *seg;
264 const char forbidden[] = { ' ', '~', '^', ':', '?', '*', '[' , '\\' };
265 const char *forbidden_seq[] = { "//", "..", "@{" };
266 const char *lfs = GOT_LOCKFILE_SUFFIX".lock";
267 const size_t lfs_len = sizeof(GOT_LOCKFILE_SUFFIX".lock") - 1;
268 size_t i;
269
270 if (name[0] == '@' && name[1] == '\0')
271 return 0;
272
273 s = name;
274 seg = s;
275 if (seg[0] == '\0' || seg[0] == '.' || seg[0] == '/')
276 return 0;
277 while (*s) {
278 for (i = 0; i < nitems(forbidden)(sizeof(forbidden) / sizeof((forbidden)[0])); i++) {
279 if (*s == forbidden[i])
280 return 0;
281 }
282 for (i = 0; i < nitems(forbidden_seq)(sizeof(forbidden_seq) / sizeof((forbidden_seq)[0])); i++) {
283 if (s[0] == forbidden_seq[i][0] &&
284 s[1] == forbidden_seq[i][1])
285 return 0;
286 }
287 if (iscntrl((unsigned char)s[0]))
288 return 0;
289 if (s[0] == '.' && s[1] == '\0')
290 return 0;
291 if (*s == '/') {
292 const char *nextseg = s + 1;
293 if (nextseg[0] == '\0' || nextseg[0] == '.' ||
294 nextseg[0] == '/')
295 return 0;
296 if (seg <= s - lfs_len &&
297 strncmp(s - lfs_len, lfs, lfs_len) == 0)
298 return 0;
299 seg = nextseg;
300 }
301 s++;
302 }
303
304 if (seg <= s - lfs_len &&
305 strncmp(s - lfs_len, lfs, lfs_len) == 0)
306 return 0;
307
308 return 1;
309}
310
311const struct got_error *
312got_ref_alloc(struct got_reference **ref, const char *name,
313 struct got_object_id *id)
314{
315 if (!is_valid_ref_name(name))
316 return got_error_path(name, GOT_ERR_BAD_REF_NAME65);
317
318 return alloc_ref(ref, name, id, 0);
319}
320
321const struct got_error *
322got_ref_alloc_symref(struct got_reference **ref, const char *name,
323 struct got_reference *target_ref)
324{
325 if (!is_valid_ref_name(name))
326 return got_error_path(name, GOT_ERR_BAD_REF_NAME65);
327
328 return alloc_symref(ref, name, got_ref_get_name(target_ref), 0);
329}
330
331static const struct got_error *
332parse_packed_ref_line(struct got_reference **ref, const char *abs_refname,
333 const char *line)
334{
335 struct got_object_id id;
336 const char *name;
337
338 *ref = NULL((void *)0);
339
340 if (line[0] == '#' || line[0] == '^')
341 return NULL((void *)0);
342
343 if (!got_parse_sha1_digest(id.sha1, line))
344 return got_error(GOT_ERR_BAD_REF_DATA57);
345
346 if (abs_refname) {
347 if (strcmp(line + SHA1_DIGEST_STRING_LENGTH(20 * 2 + 1), abs_refname) != 0)
348 return NULL((void *)0);
349 name = abs_refname;
350 } else
351 name = line + SHA1_DIGEST_STRING_LENGTH(20 * 2 + 1);
352
353 return alloc_ref(ref, name, &id, GOT_REF_IS_PACKED0x02);
354}
355
356static const struct got_error *
357open_packed_ref(struct got_reference **ref, FILE *f, const char **subdirs,
358 int nsubdirs, const char *refname)
359{
360 const struct got_error *err = NULL((void *)0);
361 char *abs_refname;
362 char *line = NULL((void *)0);
363 size_t linesize = 0;
364 ssize_t linelen;
365 int i, ref_is_absolute = (strncmp(refname, "refs/", 5) == 0);
366
367 *ref = NULL((void *)0);
368
369 if (ref_is_absolute)
370 abs_refname = (char *)refname;
371 do {
372 linelen = getline(&line, &linesize, f);
373 if (linelen == -1) {
374 if (feof(f)(!__isthreaded ? (((f)->_flags & 0x0020) != 0) : (feof
)(f)))
375 break;
376 err = got_ferror(f, GOT_ERR_BAD_REF_DATA57);
377 break;
378 }
379 if (linelen > 0 && line[linelen - 1] == '\n')
380 line[linelen - 1] = '\0';
381 for (i = 0; i < nsubdirs; i++) {
382 if (!ref_is_absolute &&
383 asprintf(&abs_refname, "refs/%s/%s", subdirs[i],
384 refname) == -1)
385 return got_error_from_errno("asprintf");
386 err = parse_packed_ref_line(ref, abs_refname, line);
387 if (!ref_is_absolute)
388 free(abs_refname);
389 if (err || *ref != NULL((void *)0))
390 break;
391 }
392 if (err)
393 break;
394 } while (*ref == NULL((void *)0));
395 free(line);
396
397 return err;
398}
399
400static const struct got_error *
401open_ref(struct got_reference **ref, const char *path_refs, const char *subdir,
402 const char *name, int lock)
403{
404 const struct got_error *err = NULL((void *)0);
405 char *path = NULL((void *)0);
406 char *absname = NULL((void *)0);
407 int ref_is_absolute = (strncmp(name, "refs/", 5) == 0);
408 int ref_is_well_known = (subdir[0] == '\0' && is_well_known_ref(name));
409
410 *ref = NULL((void *)0);
411
412 if (!is_valid_ref_name(name))
413 return got_error_path(name, GOT_ERR_BAD_REF_NAME65);
414
415 if (ref_is_absolute || ref_is_well_known) {
416 if (asprintf(&path, "%s/%s", path_refs, name) == -1)
417 return got_error_from_errno("asprintf");
418 absname = (char *)name;
419 } else {
420 if (asprintf(&path, "%s/%s%s%s", path_refs, subdir,
421 subdir[0] ? "/" : "", name) == -1)
422 return got_error_from_errno("asprintf");
423
424 if (asprintf(&absname, "refs/%s%s%s",
425 subdir, subdir[0] ? "/" : "", name) == -1) {
426 err = got_error_from_errno("asprintf");
427 goto done;
428 }
429 }
430
431 err = parse_ref_file(ref, name, absname, path, lock);
432done:
433 if (!ref_is_absolute && !ref_is_well_known)
434 free(absname);
435 free(path);
436 return err;
437}
438
439const struct got_error *
440got_ref_open(struct got_reference **ref, struct got_repository *repo,
441 const char *refname, int lock)
442{
443 const struct got_error *err = NULL((void *)0);
444 char *path_refs = NULL((void *)0);
445 const char *subdirs[] = {
446 GOT_REF_HEADS"heads", GOT_REF_TAGS"tags", GOT_REF_REMOTES"remotes"
447 };
448 size_t i;
449 int well_known = is_well_known_ref(refname);
450 struct got_lockfile *lf = NULL((void *)0);
451
452 *ref = NULL((void *)0);
14
←
Null pointer value stored to 'nextref'
→
453
454 path_refs = get_refs_dir_path(repo, refname);
455 if (path_refs == NULL((void *)0)) {
15
←
Assuming 'path_refs' is equal to NULL
→
16
←
Taking true branch
→
456 err = got_error_from_errno2("get_refs_dir_path", refname);
457 goto done;
17
←
Control jumps to line 502
→
458 }
459
460 if (well_known) {
461 err = open_ref(ref, path_refs, "", refname, lock);
462 } else {
463 char *packed_refs_path;
464 FILE *f;
465
466 /* Search on-disk refs before packed refs! */
467 for (i = 0; i < nitems(subdirs)(sizeof(subdirs) / sizeof((subdirs)[0])); i++) {
468 err = open_ref(ref, path_refs, subdirs[i], refname,
469 lock);
470 if ((err && err->code != GOT_ERR_NOT_REF5) || *ref)
471 goto done;
472 }
473
474 packed_refs_path = got_repo_get_path_packed_refs(repo);
475 if (packed_refs_path == NULL((void *)0)) {
476 err = got_error_from_errno(
477 "got_repo_get_path_packed_refs");
478 goto done;
479 }
480
481 if (lock) {
482 err = got_lockfile_lock(&lf, packed_refs_path);
483 if (err)
484 goto done;
485 }
486 f = fopen(packed_refs_path, "rb");
487 free(packed_refs_path);
488 if (f != NULL((void *)0)) {
489 err = open_packed_ref(ref, f, subdirs, nitems(subdirs)(sizeof(subdirs) / sizeof((subdirs)[0])),
490 refname);
491 if (!err) {
492 if (fclose(f) == EOF(-1)) {
493 err = got_error_from_errno("fclose");
494 got_ref_close(*ref);
495 *ref = NULL((void *)0);
496 } else if (*ref)
497 (*ref)->lf = lf;
498 }
499 }
500 }
501done:
502 if (!err && *ref == NULL((void *)0))
18
←
Assuming 'err' is null, which participates in a condition later
→
19
←
Taking true branch
→
503 err = got_error_not_ref(refname);
504 if (err && lf)
20
←
Assuming pointer value is null
→
21
←
Assuming 'err' is null, which participates in a condition later
→
505 got_lockfile_unlock(lf);
506 free(path_refs);
507 return err;
22
←
Returning null pointer (loaded from 'err'), which participates in a condition later
→
508}
509
510void
511got_ref_close(struct got_reference *ref)
512{
513 if (ref->flags & GOT_REF_IS_SYMBOLIC0x01) {
514 free(ref->ref.symref.name);
515 free(ref->ref.symref.ref);
516 } else
517 free(ref->ref.ref.name);
518 free(ref);
519}
520
521struct got_reference *
522got_ref_dup(struct got_reference *ref)
523{
524 struct got_reference *ret;
525
526 ret = calloc(1, sizeof(*ret));
527 if (ret == NULL((void *)0))
528 return NULL((void *)0);
529
530 ret->flags = ref->flags;
531 if (ref->flags & GOT_REF_IS_SYMBOLIC0x01) {
532 ret->ref.symref.name = strdup(ref->ref.symref.name);
533 if (ret->ref.symref.name == NULL((void *)0)) {
534 free(ret);
535 return NULL((void *)0);
536 }
537 ret->ref.symref.ref = strdup(ref->ref.symref.ref);
538 if (ret->ref.symref.ref == NULL((void *)0)) {
539 free(ret->ref.symref.name);
540 free(ret);
541 return NULL((void *)0);
542 }
543 } else {
544 ret->ref.ref.name = strdup(ref->ref.ref.name);
545 if (ret->ref.ref.name == NULL((void *)0)) {
546 free(ret);
547 return NULL((void *)0);
548 }
549 memcpy(ret->ref.ref.sha1, ref->ref.ref.sha1,
550 sizeof(ret->ref.ref.sha1));
551 }
552
553 return ret;
554}
555
556const struct got_error *
557got_reflist_entry_dup(struct got_reflist_entry **newp,
558 struct got_reflist_entry *re)
559{
560 const struct got_error *err = NULL((void *)0);
561 struct got_reflist_entry *new;
562
563 *newp = NULL((void *)0);
564
565 new = malloc(sizeof(*new));
566 if (new == NULL((void *)0))
567 return got_error_from_errno("malloc");
568
569 new->ref = got_ref_dup(re->ref);
570 if (new->ref == NULL((void *)0)) {
571 err = got_error_from_errno("got_ref_dup");
572 free(new);
573 return err;
574 }
575
576 *newp = new;
577 return NULL((void *)0);
578}
579
580static const struct got_error *
581resolve_symbolic_ref(struct got_reference **resolved,
582 struct got_repository *repo, struct got_reference *ref)
583{
584 struct got_reference *nextref;
585 const struct got_error *err;
586
587 err = got_ref_open(&nextref, repo, ref->ref.symref.ref, 0);
13
←
Calling 'got_ref_open'
→
23
←
Returning from 'got_ref_open'
→
588 if (err
23.1
'err' is null
)
24
←
Taking false branch
→
589 return err;
590
591 if (nextref->flags & GOT_REF_IS_SYMBOLIC0x01)
25
←
Access to field 'flags' results in a dereference of a null pointer (loaded from variable 'nextref')
592 err = resolve_symbolic_ref(resolved, repo, nextref);
593 else
594 *resolved = got_ref_dup(nextref);
595
596 got_ref_close(nextref);
597 return err;
598}
599
600static const struct got_error *
601ref_resolve(struct got_object_id **id, struct got_repository *repo,
602 struct got_reference *ref, int recursion)
603{
604 const struct got_error *err;
605
606 if (recursion
8.1
'recursion' is > 0
 <= 0)
9
←
Taking false branch
→
607 return got_error_msg(GOT_ERR_RECURSION32,
608 "reference recursion limit reached");
609
610 if (ref->flags & GOT_REF_IS_SYMBOLIC0x01) {
10
←
Assuming the condition is true
→
11
←
Taking true branch
→
611 struct got_reference *resolved = NULL((void *)0);
612 err = resolve_symbolic_ref(&resolved, repo, ref);
12
←
Calling 'resolve_symbolic_ref'
→
613 if (err == NULL((void *)0))
614 err = ref_resolve(id, repo, resolved, --recursion);
615 if (resolved)
616 got_ref_close(resolved);
617 return err;
618 }
619
620 *id = calloc(1, sizeof(**id));
621 if (*id == NULL((void *)0))
622 return got_error_from_errno("calloc");
623 memcpy((*id)->sha1, ref->ref.ref.sha1, sizeof((*id)->sha1));
624 return NULL((void *)0);
625}
626
627const struct got_error *
628got_ref_resolve(struct got_object_id **id, struct got_repository *repo,
629 struct got_reference *ref)
630{
631 return ref_resolve(id, repo, ref, GOT_REF_RECURSE_MAX20);
8
←
Calling 'ref_resolve'
→
632}
633
634char *
635got_ref_to_str(struct got_reference *ref)
636{
637 char *str;
638
639 if (ref->flags & GOT_REF_IS_SYMBOLIC0x01)
640 return strdup(ref->ref.symref.ref);
641
642 str = malloc(SHA1_DIGEST_STRING_LENGTH(20 * 2 + 1));
643 if (str == NULL((void *)0))
644 return NULL((void *)0);
645
646 if (got_sha1_digest_to_str(ref->ref.ref.sha1, str,
647 SHA1_DIGEST_STRING_LENGTH(20 * 2 + 1)) == NULL((void *)0)) {
648 free(str);
649 return NULL((void *)0);
650 }
651
652 return str;
653}
654
655const char *
656got_ref_get_name(struct got_reference *ref)
657{
658 if (ref->flags & GOT_REF_IS_SYMBOLIC0x01)
659 return ref->ref.symref.name;
660
661 return ref->ref.ref.name;
662}
663
664const char *
665got_ref_get_symref_target(struct got_reference *ref)
666{
667 if (ref->flags & GOT_REF_IS_SYMBOLIC0x01)
668 return ref->ref.symref.ref;
669
670 return NULL((void *)0);
671}
672
673const struct got_error *
674got_ref_cmp_by_name(void *arg, int *cmp, struct got_reference *re1,
675 struct got_reference* re2)
676{
677 const char *name1 = got_ref_get_name(re1);
678 const char *name2 = got_ref_get_name(re2);
679
680 *cmp = got_path_cmp(name1, name2, strlen(name1), strlen(name2));
681 return NULL((void *)0);
682}
683
684const struct got_error *
685got_ref_cmp_tags(void *arg, int *cmp, struct got_reference *ref1,
686 struct got_reference *ref2)
687{
688 const struct got_error *err = NULL((void *)0);
689 struct got_repository *repo = arg;
690 struct got_object_id *id1, *id2 = NULL((void *)0);
691 struct got_tag_object *tag1 = NULL((void *)0), *tag2 = NULL((void *)0);
692 struct got_commit_object *commit1 = NULL((void *)0), *commit2 = NULL((void *)0);
693 time_t time1, time2;
694
695 *cmp = 0;
696
697 err = got_ref_resolve(&id1, repo, ref1);
698 if (err)
699 return err;
700 err = got_object_open_as_tag(&tag1, repo, id1);
701 if (err) {
702 if (err->code != GOT_ERR_OBJ_TYPE11)
703 goto done;
704 /* "lightweight" tag */
705 err = got_object_open_as_commit(&commit1, repo, id1);
706 if (err)
707 goto done;
708 time1 = got_object_commit_get_committer_time(commit1);
709 } else
710 time1 = got_object_tag_get_tagger_time(tag1);
711
712 err = got_ref_resolve(&id2, repo, ref2);
713 if (err)
714 goto done;
715 err = got_object_open_as_tag(&tag2, repo, id2);
716 if (err) {
717 if (err->code != GOT_ERR_OBJ_TYPE11)
718 goto done;
719 /* "lightweight" tag */
720 err = got_object_open_as_commit(&commit2, repo, id2);
721 if (err)
722 goto done;
723 time2 = got_object_commit_get_committer_time(commit2);
724 } else
725 time2 = got_object_tag_get_tagger_time(tag2);
726
727 /* Put latest tags first. */
728 if (time1 < time2)
729 *cmp = 1;
730 else if (time1 > time2)
731 *cmp = -1;
732 else
733 err = got_ref_cmp_by_name(NULL((void *)0), cmp, ref2, ref1);
734done:
735 free(id1);
736 free(id2);
737 if (tag1)
738 got_object_tag_close(tag1);
739 if (tag2)
740 got_object_tag_close(tag2);
741 if (commit1)
742 got_object_commit_close(commit1);
743 if (commit2)
744 got_object_commit_close(commit2);
745 return err;
746}
747
748const struct got_error *
749got_ref_cmp_by_commit_timestamp_descending(void *arg, int *cmp,
750 struct got_reference *ref1, struct got_reference *ref2)
751{
752 const struct got_error *err;
753 struct got_repository *repo = arg;
754 struct got_object_id *id1, *id2 = NULL((void *)0);
755 struct got_commit_object *commit1 = NULL((void *)0), *commit2 = NULL((void *)0);
756 time_t time1, time2;
757
758 *cmp = 0;
759
760 err = got_ref_resolve(&id1, repo, ref1);
761 if (err)
762 return err;
763 err = got_ref_resolve(&id2, repo, ref2);
764 if (err)
765 goto done;
766
767 err = got_object_open_as_commit(&commit1, repo, id1);
768 if (err)
769 goto done;
770 err = got_object_open_as_commit(&commit2, repo, id2);
771 if (err)
772 goto done;
773
774 time1 = got_object_commit_get_committer_time(commit1);
775 time2 = got_object_commit_get_committer_time(commit2);
776 if (time1 < time2)
777 *cmp = 1;
778 else if (time2 < time1)
779 *cmp = -1;
780done:
781 free(id1);
782 free(id2);
783 if (commit1)
784 got_object_commit_close(commit1);
785 if (commit2)
786 got_object_commit_close(commit2);
787 return err;
788}
789
790static const struct got_error *
791insert_ref(struct got_reflist_entry **newp, struct got_reflist_head *refs,
792 struct got_reference *ref, struct got_repository *repo,
793 got_ref_cmp_cb cmp_cb, void *cmp_arg)
794{
795 const struct got_error *err;
796 struct got_reflist_entry *new, *re;
797 int cmp;
798
799 *newp = NULL((void *)0);
800
801 new = malloc(sizeof(*new));
802 if (new == NULL((void *)0))
803 return got_error_from_errno("malloc");
804 new->ref = ref;
805 *newp = new;
806
807 /*
808 * We must de-duplicate entries on insert because packed-refs may
809 * contain redundant entries. On-disk refs take precedence.
810 * This code assumes that on-disk revs are read before packed-refs.
811 * We're iterating the list anyway, so insert elements sorted by name.
812 *
813 * Many callers will provide paths in a somewhat sorted order.
814 * Iterating backwards from the tail of the list should be more
815 * efficient than traversing through the entire list each time
816 * an element is inserted.
817 */
818 re = TAILQ_LAST(refs, got_reflist_head)(*(((struct got_reflist_head *)((refs)->tqh_last))->tqh_last
));
819 while (re) {
820 err = (*cmp_cb)(cmp_arg, &cmp, re->ref, new->ref);
821 if (err)
822 return err;
823 if (cmp == 0) {
824 /* duplicate */
825 free(new);
826 *newp = NULL((void *)0);
827 return NULL((void *)0);
828 } else if (cmp < 0) {
829 TAILQ_INSERT_AFTER(refs, re, new, entry)do { if (((new)->entry.tqe_next = (re)->entry.tqe_next)
!= ((void *)0)) (new)->entry.tqe_next->entry.tqe_prev =
&(new)->entry.tqe_next; else (refs)->tqh_last = &
(new)->entry.tqe_next; (re)->entry.tqe_next = (new); (new
)->entry.tqe_prev = &(re)->entry.tqe_next; } while (
0);
830 return NULL((void *)0);
831 }
832 re = TAILQ_PREV(re, got_reflist_head, entry)(*(((struct got_reflist_head *)((re)->entry.tqe_prev))->
tqh_last));
833 }
834
835 TAILQ_INSERT_HEAD(refs, new, entry)do { if (((new)->entry.tqe_next = (refs)->tqh_first) !=
((void *)0)) (refs)->tqh_first->entry.tqe_prev = &
(new)->entry.tqe_next; else (refs)->tqh_last = &(new
)->entry.tqe_next; (refs)->tqh_first = (new); (new)->
entry.tqe_prev = &(refs)->tqh_first; } while (0);
836 return NULL((void *)0);
837}
838
839static const struct got_error *
840gather_on_disk_refs(struct got_reflist_head *refs, const char *path_refs,
841 const char *subdir, struct got_repository *repo,
842 got_ref_cmp_cb cmp_cb, void *cmp_arg)
843{
844 const struct got_error *err = NULL((void *)0);
845 DIR *d = NULL((void *)0);
846 char *path_subdir;
847
848 while (subdir[0] == '/')
849 subdir++;
850
851 if (asprintf(&path_subdir, "%s/%s", path_refs, subdir) == -1)
852 return got_error_from_errno("asprintf");
853
854 d = opendir(path_subdir);
855 if (d == NULL((void *)0))
856 goto done;
857
858 for (;;) {
859 struct dirent *dent;
860 struct got_reference *ref;
861 char *child;
862 int type;
863
864 dent = readdir(d);
865 if (dent == NULL((void *)0))
866 break;
867
868 if (strcmp(dent->d_name, ".") == 0 ||
869 strcmp(dent->d_name, "..") == 0)
870 continue;
871
872 err = got_path_dirent_type(&type, path_subdir, dent);
873 if (err)
874 break;
875
876 switch (type) {
877 case DT_REG8:
878 err = open_ref(&ref, path_refs, subdir, dent->d_name,
879 0);
880 if (err)
881 goto done;
882 if (ref) {
883 struct got_reflist_entry *new;
884 err = insert_ref(&new, refs, ref, repo,
885 cmp_cb, cmp_arg);
886 if (err || new == NULL((void *)0) /* duplicate */)
887 got_ref_close(ref);
888 if (err)
889 goto done;
890 }
891 break;
892 case DT_DIR4:
893 if (asprintf(&child, "%s%s%s", subdir,
894 subdir[0] == '\0' ? "" : "/", dent->d_name) == -1) {
895 err = got_error_from_errno("asprintf");
896 break;
897 }
898 err = gather_on_disk_refs(refs, path_refs, child, repo,
899 cmp_cb, cmp_arg);
900 free(child);
901 break;
902 default:
903 break;
904 }
905 }
906done:
907 if (d)
908 closedir(d);
909 free(path_subdir);
910 return err;
911}
912
913const struct got_error *
914got_ref_list(struct got_reflist_head *refs, struct got_repository *repo,
915 const char *ref_namespace, got_ref_cmp_cb cmp_cb, void *cmp_arg)
916{
917 const struct got_error *err;
918 char *packed_refs_path, *path_refs = NULL((void *)0);
919 char *abs_namespace = NULL((void *)0);
920 char *buf = NULL((void *)0), *ondisk_ref_namespace = NULL((void *)0);
921 char *line = NULL((void *)0);
922 FILE *f = NULL((void *)0);
923 struct got_reference *ref;
924 struct got_reflist_entry *new;
925
926 if (ref_namespace == NULL((void *)0) || ref_namespace[0] == '\0') {
927 path_refs = get_refs_dir_path(repo, GOT_REF_HEAD"HEAD");
928 if (path_refs == NULL((void *)0)) {
929 err = got_error_from_errno("get_refs_dir_path");
930 goto done;
931 }
932 err = open_ref(&ref, path_refs, "", GOT_REF_HEAD"HEAD", 0);
933 if (err)
934 goto done;
935 err = insert_ref(&new, refs, ref, repo,
936 cmp_cb, cmp_arg);
937 if (err || new == NULL((void *)0) /* duplicate */)
938 got_ref_close(ref);
939 if (err && err->code != GOT_ERR_NOT_REF5)
940 goto done;
941 } else {
942 /* Try listing a single reference. */
943 const char *refname = ref_namespace;
944 path_refs = get_refs_dir_path(repo, refname);
945 if (path_refs == NULL((void *)0)) {
946 err = got_error_from_errno("get_refs_dir_path");
947 goto done;
948 }
949 err = open_ref(&ref, path_refs, "", refname, 0);
950 if (err) {
951 if (err->code != GOT_ERR_NOT_REF5)
952 goto done;
953 /* Try to look up references in a given namespace. */
954 } else {
955 err = insert_ref(&new, refs, ref, repo,
956 cmp_cb, cmp_arg);
957 if (err || new == NULL((void *)0) /* duplicate */)
958 got_ref_close(ref);
959 return err;
960 }
961 }
962
963 if (ref_namespace) {
964 size_t len;
965 /* Canonicalize the path to eliminate double-slashes if any. */
966 if (asprintf(&abs_namespace, "/%s", ref_namespace) == -1) {
967 err = got_error_from_errno("asprintf");
968 goto done;
969 }
970 len = strlen(abs_namespace) + 1;
971 buf = malloc(len);
972 if (buf == NULL((void *)0)) {
973 err = got_error_from_errno("malloc");
974 goto done;
975 }
976 err = got_canonpath(abs_namespace, buf, len);
977 if (err)
978 goto done;
979 ondisk_ref_namespace = buf;
980 while (ondisk_ref_namespace[0] == '/')
981 ondisk_ref_namespace++;
982 if (strncmp(ondisk_ref_namespace, "refs/", 5) == 0)
983 ondisk_ref_namespace += 5;
984 else if (strcmp(ondisk_ref_namespace, "refs") == 0)
985 ondisk_ref_namespace = "";
986 }
987
988 /* Gather on-disk refs before parsing packed-refs. */
989 free(path_refs);
990 path_refs = get_refs_dir_path(repo, "");
991 if (path_refs == NULL((void *)0)) {
992 err = got_error_from_errno("get_refs_dir_path");
993 goto done;
994 }
995 err = gather_on_disk_refs(refs, path_refs,
996 ondisk_ref_namespace ? ondisk_ref_namespace : "", repo,
997 cmp_cb, cmp_arg);
998 if (err)
999 goto done;
1000
1001 /*
1002 * The packed-refs file may contain redundant entries, in which
1003 * case on-disk refs take precedence.
1004 */
1005 packed_refs_path = got_repo_get_path_packed_refs(repo);
1006 if (packed_refs_path == NULL((void *)0)) {
1007 err = got_error_from_errno("got_repo_get_path_packed_refs");
1008 goto done;
1009 }
1010
1011 f = fopen(packed_refs_path, "r");
1012 free(packed_refs_path);
1013 if (f) {
1014 size_t linesize = 0;
1015 ssize_t linelen;
1016 for (;;) {
1017 linelen = getline(&line, &linesize, f);
1018 if (linelen == -1) {
1019 if (feof(f)(!__isthreaded ? (((f)->_flags & 0x0020) != 0) : (feof
)(f)))
1020 break;
1021 err = got_ferror(f, GOT_ERR_BAD_REF_DATA57);
1022 goto done;
1023 }
1024 if (linelen > 0 && line[linelen - 1] == '\n')
1025 line[linelen - 1] = '\0';
1026 err = parse_packed_ref_line(&ref, NULL((void *)0), line);
1027 if (err)
1028 goto done;
1029 if (ref) {
1030 if (ref_namespace) {
1031 const char *name;
1032 name = got_ref_get_name(ref);
1033 if (!got_path_is_child(name,
1034 ref_namespace,
1035 strlen(ref_namespace))) {
1036 got_ref_close(ref);
1037 continue;
1038 }
1039 }
1040 err = insert_ref(&new, refs, ref, repo,
1041 cmp_cb, cmp_arg);
1042 if (err || new == NULL((void *)0) /* duplicate */)
1043 got_ref_close(ref);
1044 if (err)
1045 goto done;
1046 }
1047 }
1048 }
1049done:
1050 free(abs_namespace);
1051 free(buf);
1052 free(line);
1053 free(path_refs);
1054 if (f && fclose(f) == EOF(-1) && err == NULL((void *)0))
1055 err = got_error_from_errno("fclose");
1056 return err;
1057}
1058
1059void
1060got_ref_list_free(struct got_reflist_head *refs)
1061{
1062 struct got_reflist_entry *re;
1063
1064 while ((re = TAILQ_FIRST(refs)((refs)->tqh_first))) {
1065 TAILQ_REMOVE(refs, re, entry)do { if (((re)->entry.tqe_next) != ((void *)0)) (re)->entry
.tqe_next->entry.tqe_prev = (re)->entry.tqe_prev; else (
refs)->tqh_last = (re)->entry.tqe_prev; *(re)->entry
.tqe_prev = (re)->entry.tqe_next; ; ; } while (0);
1066 got_ref_close(re->ref);
1067 free(re);
1068 }
1069
1070}
1071
1072int
1073got_ref_is_symbolic(struct got_reference *ref)
1074{
1075 return (ref->flags & GOT_REF_IS_SYMBOLIC0x01);
1076}
1077
1078const struct got_error *
1079got_ref_change_ref(struct got_reference *ref, struct got_object_id *id)
1080{
1081 if (ref->flags & GOT_REF_IS_SYMBOLIC0x01)
1082 return got_error(GOT_ERR_BAD_REF_TYPE70);
1083
1084 memcpy(ref->ref.ref.sha1, id->sha1, sizeof(ref->ref.ref.sha1));
1085 return NULL((void *)0);
1086}
1087
1088const struct got_error *
1089got_ref_change_symref(struct got_reference *ref, const char *refname)
1090{
1091 char *new_name;
1092
1093 if ((ref->flags & GOT_REF_IS_SYMBOLIC0x01) == 0)
1094 return got_error(GOT_ERR_BAD_REF_TYPE70);
1095
1096 new_name = strdup(refname);
1097 if (new_name == NULL((void *)0))
1098 return got_error_from_errno("strdup");
1099
1100 free(ref->ref.symref.ref);
1101 ref->ref.symref.ref = new_name;
1102 return NULL((void *)0);
1103}
1104
1105const struct got_error *
1106got_ref_change_symref_to_ref(struct got_reference *symref,
1107 struct got_object_id *id)
1108{
1109 if ((symref->flags & GOT_REF_IS_SYMBOLIC0x01) == 0)
1110 return got_error(GOT_ERR_BAD_REF_TYPE70);
1111
1112 symref->ref.ref.name = symref->ref.symref.name;
1113 memcpy(symref->ref.ref.sha1, id->sha1, SHA1_DIGEST_LENGTH20);
1114 symref->flags &= ~GOT_REF_IS_SYMBOLIC0x01;
1115 return NULL((void *)0);
1116}
1117
1118const struct got_error *
1119got_ref_write(struct got_reference *ref, struct got_repository *repo)
1120{
1121 const struct got_error *err = NULL((void *)0), *unlock_err = NULL((void *)0);
1122 const char *name = got_ref_get_name(ref);
1123 char *path_refs = NULL((void *)0), *path = NULL((void *)0), *tmppath = NULL((void *)0);
1124 struct got_lockfile *lf = NULL((void *)0);
1125 FILE *f = NULL((void *)0);
1126 size_t n;
1127 struct stat sb;
1128
1129 path_refs = get_refs_dir_path(repo, name);
1130 if (path_refs == NULL((void *)0)) {
1131 err = got_error_from_errno2("get_refs_dir_path", name);
1132 goto done;
1133 }
1134
1135 if (asprintf(&path, "%s/%s", path_refs, name) == -1) {
1136 err = got_error_from_errno("asprintf");
1137 goto done;
1138 }
1139
1140 err = got_opentemp_named(&tmppath, &f, path);
1141 if (err) {
1142 char *parent;
1143 if (!(err->code == GOT_ERR_ERRNO1 && errno(*__errno()) == ENOENT2))
1144 goto done;
1145 err = got_path_dirname(&parent, path);
1146 if (err)
1147 goto done;
1148 err = got_path_mkdir(parent);
1149 free(parent);
1150 if (err)
1151 goto done;
1152 err = got_opentemp_named(&tmppath, &f, path);
1153 if (err)
1154 goto done;
1155 }
1156
1157 if (ref->flags & GOT_REF_IS_SYMBOLIC0x01) {
1158 n = fprintf(f, "ref: %s\n", ref->ref.symref.ref);
1159 if (n != strlen(ref->ref.symref.ref) + 6) {
1160 err = got_ferror(f, GOT_ERR_IO6);
1161 goto done;
1162 }
1163 } else {
1164 char hex[SHA1_DIGEST_STRING_LENGTH(20 * 2 + 1)];
1165 if (got_sha1_digest_to_str(ref->ref.ref.sha1, hex,
1166 sizeof(hex)) == NULL((void *)0)) {
1167 err = got_error(GOT_ERR_BAD_REF_DATA57);
1168 goto done;
1169 }
1170 n = fprintf(f, "%s\n", hex);
1171 if (n != sizeof(hex)) {
1172 err = got_ferror(f, GOT_ERR_IO6);
1173 goto done;
1174 }
1175 }
1176
1177 if (ref->lf == NULL((void *)0)) {
1178 err = got_lockfile_lock(&lf, path);
1179 if (err)
1180 goto done;
1181 }
1182
1183 /* XXX: check if old content matches our expectations? */
1184
1185 if (stat(path, &sb) != 0) {
1186 if (errno(*__errno()) != ENOENT2) {
1187 err = got_error_from_errno2("stat", path);
1188 goto done;
1189 }
1190 sb.st_mode = GOT_DEFAULT_FILE_MODE(0100000 | 0000400|0000200 | 0000040 | 0000004);
1191 }
1192
1193 if (fchmod(fileno(f)(!__isthreaded ? ((f)->_file) : (fileno)(f)), sb.st_mode) != 0) {
1194 err = got_error_from_errno2("fchmod", tmppath);
1195 goto done;
1196 }
1197
1198 if (rename(tmppath, path) != 0) {
1199 err = got_error_from_errno3("rename", tmppath, path);
1200 goto done;
1201 }
1202 free(tmppath);
1203 tmppath = NULL((void *)0);
1204done:
1205 if (ref->lf == NULL((void *)0) && lf)
1206 unlock_err = got_lockfile_unlock(lf);
1207 if (f) {
1208 if (fclose(f) == EOF(-1) && err == NULL((void *)0))
1209 err = got_error_from_errno("fclose");
1210 }
1211 free(path_refs);
1212 free(path);
1213 if (tmppath) {
1214 if (unlink(tmppath) != 0 && err == NULL((void *)0))
1215 err = got_error_from_errno2("unlink", tmppath);
1216 free(tmppath);
1217 }
1218 return err ? err : unlock_err;
1219}
1220
1221static const struct got_error *
1222delete_packed_ref(struct got_reference *delref, struct got_repository *repo)
1223{
1224 const struct got_error *err = NULL((void *)0), *unlock_err = NULL((void *)0);
1225 struct got_lockfile *lf = NULL((void *)0);
1226 FILE *f = NULL((void *)0), *tmpf = NULL((void *)0);
1227 char *line = NULL((void *)0), *packed_refs_path, *tmppath = NULL((void *)0);
1228 size_t linesize = 0;
1229 struct got_reflist_head refs;
1230 int found_delref = 0;
1231
1232 /* The packed-refs file does not cotain symbolic references. */
1233 if (delref->flags & GOT_REF_IS_SYMBOLIC0x01)
1234 return got_error(GOT_ERR_BAD_REF_DATA57);
1235
1236 TAILQ_INIT(&refs)do { (&refs)->tqh_first = ((void *)0); (&refs)->
tqh_last = &(&refs)->tqh_first; } while (0);
1237
1238 packed_refs_path = got_repo_get_path_packed_refs(repo);
1239 if (packed_refs_path == NULL((void *)0))
1240 return got_error_from_errno("got_repo_get_path_packed_refs");
1241
1242 err = got_opentemp_named(&tmppath, &tmpf, packed_refs_path);
1243 if (err)
1244 goto done;
1245
1246 if (delref->lf == NULL((void *)0)) {
1247 err = got_lockfile_lock(&lf, packed_refs_path);
1248 if (err)
1249 goto done;
1250 }
1251
1252 f = fopen(packed_refs_path, "r");
1253 if (f == NULL((void *)0)) {
1254 err = got_error_from_errno2("fopen", packed_refs_path);
1255 goto done;
1256 }
1257 for (;;) {
1258 ssize_t linelen;
1259 struct got_reference *ref;
1260 struct got_reflist_entry *new;
1261
1262 linelen = getline(&line, &linesize, f);
1263 if (linelen == -1) {
1264 if (feof(f)(!__isthreaded ? (((f)->_flags & 0x0020) != 0) : (feof
)(f)))
1265 break;
1266 err = got_ferror(f, GOT_ERR_BAD_REF_DATA57);
1267 goto done;
1268 }
1269 if (linelen > 0 && line[linelen - 1] == '\n')
1270 line[linelen - 1] = '\0';
1271 err = parse_packed_ref_line(&ref, NULL((void *)0), line);
1272 if (err)
1273 goto done;
1274 if (ref == NULL((void *)0))
1275 continue;
1276
1277 if (strcmp(ref->ref.ref.name, delref->ref.ref.name) == 0 &&
1278 memcmp(ref->ref.ref.sha1, delref->ref.ref.sha1,
1279 sizeof(delref->ref.ref.sha1)) == 0) {
1280 found_delref = 1;
1281 got_ref_close(ref);
1282 continue;
1283 }
1284
1285 err = insert_ref(&new, &refs, ref, repo,
1286 got_ref_cmp_by_name, NULL((void *)0));
1287 if (err || new == NULL((void *)0) /* duplicate */)
1288 got_ref_close(ref);
1289 if (err)
1290 goto done;
1291 }
1292
1293 if (found_delref) {
1294 struct got_reflist_entry *re;
1295 size_t n;
1296 struct stat sb;
1297
1298 n = fprintf(tmpf, "%s\n", GOT_PACKED_REFS_HEADER"# pack-refs with:");
1299 if (n != sizeof(GOT_PACKED_REFS_HEADER"# pack-refs with:")) {
1300 err = got_ferror(f, GOT_ERR_IO6);
1301 goto done;
1302 }
1303
1304 TAILQ_FOREACH(re, &refs, entry)for((re) = ((&refs)->tqh_first); (re) != ((void *)0); (
re) = ((re)->entry.tqe_next)) {
1305 uint8_t hex[SHA1_DIGEST_STRING_LENGTH(20 * 2 + 1)];
1306
1307 if (got_sha1_digest_to_str(re->ref->ref.ref.sha1, hex,
1308 sizeof(hex)) == NULL((void *)0)) {
1309 err = got_error(GOT_ERR_BAD_REF_DATA57);
1310 goto done;
1311 }
1312 n = fprintf(tmpf, "%s ", hex);
1313 if (n != sizeof(hex)) {
1314 err = got_ferror(f, GOT_ERR_IO6);
1315 goto done;
1316 }
1317 n = fprintf(tmpf, "%s\n", re->ref->ref.ref.name);
1318 if (n != strlen(re->ref->ref.ref.name) + 1) {
1319 err = got_ferror(f, GOT_ERR_IO6);
1320 goto done;
1321 }
1322 }
1323
1324 if (fflush(tmpf) != 0) {
1325 err = got_error_from_errno("fflush");
1326 goto done;
1327 }
1328
1329 if (fstat(fileno(f)(!__isthreaded ? ((f)->_file) : (fileno)(f)), &sb) != 0) {
1330 if (errno(*__errno()) != ENOENT2) {
1331 err = got_error_from_errno2("fstat",
1332 packed_refs_path);
1333 goto done;
1334 }
1335 sb.st_mode = GOT_DEFAULT_FILE_MODE(0100000 | 0000400|0000200 | 0000040 | 0000004);
1336 }
1337
1338 if (fchmod(fileno(tmpf)(!__isthreaded ? ((tmpf)->_file) : (fileno)(tmpf)), sb.st_mode) != 0) {
1339 err = got_error_from_errno2("fchmod", tmppath);
1340 goto done;
1341 }
1342
1343 if (rename(tmppath, packed_refs_path) != 0) {
1344 err = got_error_from_errno3("rename", tmppath,
1345 packed_refs_path);
1346 goto done;
1347 }
1348 }
1349done:
1350 if (delref->lf == NULL((void *)0) && lf)
1351 unlock_err = got_lockfile_unlock(lf);
1352 if (f) {
1353 if (fclose(f) == EOF(-1) && err == NULL((void *)0))
1354 err = got_error_from_errno("fclose");
1355 }
1356 if (tmpf) {
1357 unlink(tmppath);
1358 if (fclose(tmpf) == EOF(-1) && err == NULL((void *)0))
1359 err = got_error_from_errno("fclose");
1360 }
1361 free(tmppath);
1362 free(packed_refs_path);
1363 free(line);
1364 got_ref_list_free(&refs);
1365 return err ? err : unlock_err;
1366}
1367
1368static const struct got_error *
1369delete_loose_ref(struct got_reference *ref, struct got_repository *repo)
1370{
1371 const struct got_error *err = NULL((void *)0), *unlock_err = NULL((void *)0);
1372 const char *name = got_ref_get_name(ref);
1373 char *path_refs = NULL((void *)0), *path = NULL((void *)0);
1374 struct got_lockfile *lf = NULL((void *)0);
1375
1376 path_refs = get_refs_dir_path(repo, name);
1377 if (path_refs == NULL((void *)0)) {
1378 err = got_error_from_errno2("get_refs_dir_path", name);
1379 goto done;
1380 }
1381
1382 if (asprintf(&path, "%s/%s", path_refs, name) == -1) {
1383 err = got_error_from_errno("asprintf");
1384 goto done;
1385 }
1386
1387 if (ref->lf == NULL((void *)0)) {
1388 err = got_lockfile_lock(&lf, path);
1389 if (err)
1390 goto done;
1391 }
1392
1393 /* XXX: check if old content matches our expectations? */
1394
1395 if (unlink(path) != 0)
1396 err = got_error_from_errno2("unlink", path);
1397done:
1398 if (ref->lf == NULL((void *)0) && lf)
1399 unlock_err = got_lockfile_unlock(lf);
1400
1401 free(path_refs);
1402 free(path);
1403 return err ? err : unlock_err;
1404}
1405
1406const struct got_error *
1407got_ref_delete(struct got_reference *ref, struct got_repository *repo)
1408{
1409 const struct got_error *err = NULL((void *)0);
1410 struct got_reference *ref2;
1411
1412 if (ref->flags & GOT_REF_IS_PACKED0x02) {
1413 err = delete_packed_ref(ref, repo);
1414 if (err)
1415 return err;
1416
1417 err = got_ref_open(&ref2, repo, got_ref_get_name(ref), 0);
1418 if (err) {
1419 if (err->code == GOT_ERR_NOT_REF5)
1420 return NULL((void *)0);
1421 return err;
1422 }
1423
1424 err = delete_loose_ref(ref2, repo);
1425 got_ref_close(ref2);
1426 return err;
1427 } else {
1428 err = delete_loose_ref(ref, repo);
1429 if (err)
1430 return err;
1431
1432 err = got_ref_open(&ref2, repo, got_ref_get_name(ref), 0);
1433 if (err) {
1434 if (err->code == GOT_ERR_NOT_REF5)
1435 return NULL((void *)0);
1436 return err;
1437 }
1438
1439 err = delete_packed_ref(ref2, repo);
1440 got_ref_close(ref2);
1441 return err;
1442 }
1443}
1444
1445const struct got_error *
1446got_ref_unlock(struct got_reference *ref)
1447{
1448 const struct got_error *err;
1449 err = got_lockfile_unlock(ref->lf);
1450 ref->lf = NULL((void *)0);
1451 return err;
1452}
1453
1454struct got_reflist_object_id_map {
1455 struct got_object_idset *idset;
1456};
1457
1458struct got_reflist_object_id_map_entry {
1459 struct got_reflist_head refs;
1460};
1461
1462static const struct got_error *
1463add_object_id_map_entry(struct got_object_idset *idset,
1464 struct got_object_id *id, struct got_reflist_entry *re)
1465{
1466 const struct got_error *err = NULL((void *)0);
1467 struct got_reflist_object_id_map_entry *ent;
1468 struct got_reflist_entry *new;
1469
1470 ent = got_object_idset_get(idset, id);
1471 if (ent == NULL((void *)0)) {
1472 ent = malloc(sizeof(*ent));
1473 if (ent == NULL((void *)0))
1474 return got_error_from_errno("malloc");
1475
1476 TAILQ_INIT(&ent->refs)do { (&ent->refs)->tqh_first = ((void *)0); (&ent
->refs)->tqh_last = &(&ent->refs)->tqh_first
; } while (0);
1477 err = got_object_idset_add(idset, id, ent);
1478 if (err)
1479 return err;
1480 }
1481
1482 err = got_reflist_entry_dup(&new, re);
1483 if (err)
1484 return err;
1485
1486 TAILQ_INSERT_TAIL(&ent->refs, new, entry)do { (new)->entry.tqe_next = ((void *)0); (new)->entry.
tqe_prev = (&ent->refs)->tqh_last; *(&ent->refs
)->tqh_last = (new); (&ent->refs)->tqh_last = &
(new)->entry.tqe_next; } while (0);
1487 return NULL((void *)0);
1488}
1489
1490const struct got_error *
1491got_reflist_object_id_map_create(struct got_reflist_object_id_map **map,
1492 struct got_reflist_head *refs, struct got_repository *repo)
1493{
1494 const struct got_error *err = NULL((void *)0);
1495 struct got_object_idset *idset;
1496 struct got_object_id *id = NULL((void *)0);
1497 struct got_reflist_entry *re;
1498
1499 idset = got_object_idset_alloc();
1500 if (idset == NULL((void *)0))
1
Assuming 'idset' is not equal to NULL
→
2
←
Taking false branch
→
1501 return got_error_from_errno("got_object_idset_alloc");
1502
1503 *map = malloc(sizeof(**map));
1504 if (*map == NULL((void *)0)) {
3
←
Assuming the condition is false
→
4
←
Taking false branch
→
1505 got_object_idset_free(idset);
1506 return got_error_from_errno("malloc");
1507 }
1508 (*map)->idset = idset;
1509
1510 TAILQ_FOREACH(re, refs, entry)for((re) = ((refs)->tqh_first); (re) != ((void *)0); (re) =
((re)->entry.tqe_next)) {
5
←
Assuming 're' is not equal to null
→
6
←
Loop condition is true. Entering loop body
→
1511 struct got_tag_object *tag = NULL((void *)0);
1512
1513 err = got_ref_resolve(&id, repo, re->ref);
7
←
Calling 'got_ref_resolve'
→
1514 if (err)
1515 goto done;
1516
1517 err = add_object_id_map_entry(idset, id, re);
1518 if (err)
1519 goto done;
1520
1521 if (strstr(got_ref_get_name(re->ref), "/tags/") == NULL((void *)0)) {
1522 free(id);
1523 id = NULL((void *)0);
1524 continue;
1525 }
1526
1527 err = got_object_open_as_tag(&tag, repo, id);
1528 if (err) {
1529 if (err->code != GOT_ERR_OBJ_TYPE11)
1530 goto done;
1531 /* Ref points at something other than a tag. */
1532 err = NULL((void *)0);
1533 tag = NULL((void *)0);
1534 free(id);
1535 id = NULL((void *)0);
1536 continue;
1537 }
1538
1539 err = add_object_id_map_entry(idset,
1540 got_object_tag_get_object_id(tag), re);
1541 got_object_tag_close(tag);
1542 if (err)
1543 goto done;
1544
1545 free(id);
1546 id = NULL((void *)0);
1547 }
1548done:
1549 free(id);
1550 if (err) {
1551 got_reflist_object_id_map_free(*map);
1552 *map = NULL((void *)0);
1553 }
1554 return err;
1555}
1556
1557struct got_reflist_head *
1558got_reflist_object_id_map_lookup(struct got_reflist_object_id_map *map,
1559 struct got_object_id *id)
1560{
1561 struct got_reflist_object_id_map_entry *ent;
1562 ent = got_object_idset_get(map->idset, id);
1563 if (ent)
1564 return &ent->refs;
1565 return NULL((void *)0);
1566}
1567
1568static const struct got_error *
1569free_id_map_entry(struct got_object_id *id, void *data, void *arg)
1570{
1571 struct got_reflist_object_id_map_entry *ent = data;
1572
1573 got_ref_list_free(&ent->refs);
1574 free(ent);
1575 return NULL((void *)0);
1576}
1577
1578void
1579got_reflist_object_id_map_free(struct got_reflist_object_id_map *map)
1580{
1581 got_object_idset_for_each(map->idset, free_id_map_entry, NULL((void *)0));
1582 got_object_idset_free(map->idset);
1583 free(map);
1584}