fsck: make fsck_ident() warn-friendly
[git/git.git] / fsck.c
CommitLineData
355885d5
MK
1#include "cache.h"
2#include "object.h"
3#include "blob.h"
4#include "tree.h"
5#include "tree-walk.h"
6#include "commit.h"
7#include "tag.h"
8#include "fsck.h"
cec097be 9#include "refs.h"
a18fcc9f 10#include "utf8.h"
355885d5 11
c99ba492
JS
12#define FOREACH_MSG_ID(FUNC) \
13 /* errors */ \
14 FUNC(BAD_DATE, ERROR) \
15 FUNC(BAD_DATE_OVERFLOW, ERROR) \
16 FUNC(BAD_EMAIL, ERROR) \
17 FUNC(BAD_NAME, ERROR) \
18 FUNC(BAD_OBJECT_SHA1, ERROR) \
19 FUNC(BAD_PARENT_SHA1, ERROR) \
20 FUNC(BAD_TAG_OBJECT, ERROR) \
21 FUNC(BAD_TIMEZONE, ERROR) \
22 FUNC(BAD_TREE, ERROR) \
23 FUNC(BAD_TREE_SHA1, ERROR) \
24 FUNC(BAD_TYPE, ERROR) \
25 FUNC(DUPLICATE_ENTRIES, ERROR) \
26 FUNC(MISSING_AUTHOR, ERROR) \
27 FUNC(MISSING_COMMITTER, ERROR) \
28 FUNC(MISSING_EMAIL, ERROR) \
29 FUNC(MISSING_GRAFT, ERROR) \
30 FUNC(MISSING_NAME_BEFORE_EMAIL, ERROR) \
31 FUNC(MISSING_OBJECT, ERROR) \
32 FUNC(MISSING_PARENT, ERROR) \
33 FUNC(MISSING_SPACE_BEFORE_DATE, ERROR) \
34 FUNC(MISSING_SPACE_BEFORE_EMAIL, ERROR) \
35 FUNC(MISSING_TAG, ERROR) \
36 FUNC(MISSING_TAG_ENTRY, ERROR) \
37 FUNC(MISSING_TAG_OBJECT, ERROR) \
38 FUNC(MISSING_TREE, ERROR) \
39 FUNC(MISSING_TYPE, ERROR) \
40 FUNC(MISSING_TYPE_ENTRY, ERROR) \
41 FUNC(NUL_IN_HEADER, ERROR) \
42 FUNC(TAG_OBJECT_NOT_TAG, ERROR) \
43 FUNC(TREE_NOT_SORTED, ERROR) \
44 FUNC(UNKNOWN_TYPE, ERROR) \
45 FUNC(UNTERMINATED_HEADER, ERROR) \
46 FUNC(ZERO_PADDED_DATE, ERROR) \
47 /* warnings */ \
48 FUNC(BAD_FILEMODE, WARN) \
49 FUNC(BAD_TAG_NAME, WARN) \
50 FUNC(EMPTY_NAME, WARN) \
51 FUNC(FULL_PATHNAME, WARN) \
52 FUNC(HAS_DOT, WARN) \
53 FUNC(HAS_DOTDOT, WARN) \
54 FUNC(HAS_DOTGIT, WARN) \
55 FUNC(MISSING_TAGGER_ENTRY, WARN) \
56 FUNC(NULL_SHA1, WARN) \
57 FUNC(ZERO_PADDED_FILEMODE, WARN)
58
59#define MSG_ID(id, msg_type) FSCK_MSG_##id,
60enum fsck_msg_id {
61 FOREACH_MSG_ID(MSG_ID)
62 FSCK_MSG_MAX
63};
64#undef MSG_ID
65
f417eed8
JS
66#define STR(x) #x
67#define MSG_ID(id, msg_type) { STR(id), NULL, FSCK_##msg_type },
c99ba492 68static struct {
f417eed8
JS
69 const char *id_string;
70 const char *downcased;
c99ba492
JS
71 int msg_type;
72} msg_id_info[FSCK_MSG_MAX + 1] = {
73 FOREACH_MSG_ID(MSG_ID)
f417eed8 74 { NULL, NULL, -1 }
c99ba492
JS
75};
76#undef MSG_ID
77
f417eed8
JS
78static int parse_msg_id(const char *text)
79{
80 int i;
81
82 if (!msg_id_info[0].downcased) {
83 /* convert id_string to lower case, without underscores. */
84 for (i = 0; i < FSCK_MSG_MAX; i++) {
85 const char *p = msg_id_info[i].id_string;
86 int len = strlen(p);
87 char *q = xmalloc(len);
88
89 msg_id_info[i].downcased = q;
90 while (*p)
91 if (*p == '_')
92 p++;
93 else
94 *(q)++ = tolower(*(p)++);
95 *q = '\0';
96 }
97 }
98
99 for (i = 0; i < FSCK_MSG_MAX; i++)
100 if (!strcmp(text, msg_id_info[i].downcased))
101 return i;
102
103 return -1;
104}
105
c99ba492
JS
106static int fsck_msg_type(enum fsck_msg_id msg_id,
107 struct fsck_options *options)
108{
109 int msg_type;
110
0282f4dc
JS
111 assert(msg_id >= 0 && msg_id < FSCK_MSG_MAX);
112
113 if (options->msg_type)
114 msg_type = options->msg_type[msg_id];
115 else {
116 msg_type = msg_id_info[msg_id].msg_type;
117 if (options->strict && msg_type == FSCK_WARN)
118 msg_type = FSCK_ERROR;
119 }
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120
121 return msg_type;
122}
123
0282f4dc
JS
124static int parse_msg_type(const char *str)
125{
126 if (!strcmp(str, "error"))
127 return FSCK_ERROR;
128 else if (!strcmp(str, "warn"))
129 return FSCK_WARN;
130 else
131 die("Unknown fsck message type: '%s'", str);
132}
133
5d477a33
JS
134int is_valid_msg_type(const char *msg_id, const char *msg_type)
135{
136 if (parse_msg_id(msg_id) < 0)
137 return 0;
138 parse_msg_type(msg_type);
139 return 1;
140}
141
0282f4dc
JS
142void fsck_set_msg_type(struct fsck_options *options,
143 const char *msg_id, const char *msg_type)
144{
145 int id = parse_msg_id(msg_id), type;
146
147 if (id < 0)
148 die("Unhandled message id: %s", msg_id);
149 type = parse_msg_type(msg_type);
150
151 if (!options->msg_type) {
152 int i;
153 int *msg_type = xmalloc(sizeof(int) * FSCK_MSG_MAX);
154 for (i = 0; i < FSCK_MSG_MAX; i++)
155 msg_type[i] = fsck_msg_type(i, options);
156 options->msg_type = msg_type;
157 }
158
159 options->msg_type[id] = type;
160}
161
162void fsck_set_msg_types(struct fsck_options *options, const char *values)
163{
164 char *buf = xstrdup(values), *to_free = buf;
165 int done = 0;
166
167 while (!done) {
168 int len = strcspn(buf, " ,|"), equal;
169
170 done = !buf[len];
171 if (!len) {
172 buf++;
173 continue;
174 }
175 buf[len] = '\0';
176
177 for (equal = 0;
178 equal < len && buf[equal] != '=' && buf[equal] != ':';
179 equal++)
180 buf[equal] = tolower(buf[equal]);
181 buf[equal] = '\0';
182
183 if (equal == len)
184 die("Missing '=': '%s'", buf);
185
186 fsck_set_msg_type(options, buf, buf + equal + 1);
187 buf += len + 1;
188 }
189 free(to_free);
190}
191
71ab8fa8
JS
192static void append_msg_id(struct strbuf *sb, const char *msg_id)
193{
194 for (;;) {
195 char c = *(msg_id)++;
196
197 if (!c)
198 break;
199 if (c != '_')
200 strbuf_addch(sb, tolower(c));
201 else {
202 assert(*msg_id);
203 strbuf_addch(sb, *(msg_id)++);
204 }
205 }
206
207 strbuf_addstr(sb, ": ");
208}
209
c99ba492
JS
210__attribute__((format (printf, 4, 5)))
211static int report(struct fsck_options *options, struct object *object,
212 enum fsck_msg_id id, const char *fmt, ...)
213{
214 va_list ap;
215 struct strbuf sb = STRBUF_INIT;
216 int msg_type = fsck_msg_type(id, options), result;
217
71ab8fa8
JS
218 append_msg_id(&sb, msg_id_info[id].id_string);
219
c99ba492
JS
220 va_start(ap, fmt);
221 strbuf_vaddf(&sb, fmt, ap);
222 result = options->error_func(object, msg_type, sb.buf);
223 strbuf_release(&sb);
224 va_end(ap);
225
226 return result;
227}
228
22410549 229static int fsck_walk_tree(struct tree *tree, void *data, struct fsck_options *options)
355885d5
MK
230{
231 struct tree_desc desc;
232 struct name_entry entry;
233 int res = 0;
234
235 if (parse_tree(tree))
236 return -1;
237
238 init_tree_desc(&desc, tree->buffer, tree->size);
239 while (tree_entry(&desc, &entry)) {
240 int result;
241
242 if (S_ISGITLINK(entry.mode))
243 continue;
244 if (S_ISDIR(entry.mode))
22410549 245 result = options->walk(&lookup_tree(entry.sha1)->object, OBJ_TREE, data, options);
355885d5 246 else if (S_ISREG(entry.mode) || S_ISLNK(entry.mode))
22410549 247 result = options->walk(&lookup_blob(entry.sha1)->object, OBJ_BLOB, data, options);
355885d5 248 else {
82247e9b 249 result = error("in tree %s: entry %s has bad mode %.6o",
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MK
250 sha1_to_hex(tree->object.sha1), entry.path, entry.mode);
251 }
252 if (result < 0)
253 return result;
254 if (!res)
255 res = result;
256 }
257 return res;
258}
259
22410549 260static int fsck_walk_commit(struct commit *commit, void *data, struct fsck_options *options)
355885d5
MK
261{
262 struct commit_list *parents;
263 int res;
264 int result;
265
266 if (parse_commit(commit))
267 return -1;
268
22410549 269 result = options->walk((struct object *)commit->tree, OBJ_TREE, data, options);
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MK
270 if (result < 0)
271 return result;
272 res = result;
273
274 parents = commit->parents;
275 while (parents) {
22410549 276 result = options->walk((struct object *)parents->item, OBJ_COMMIT, data, options);
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MK
277 if (result < 0)
278 return result;
279 if (!res)
280 res = result;
281 parents = parents->next;
282 }
283 return res;
284}
285
22410549 286static int fsck_walk_tag(struct tag *tag, void *data, struct fsck_options *options)
355885d5
MK
287{
288 if (parse_tag(tag))
289 return -1;
22410549 290 return options->walk(tag->tagged, OBJ_ANY, data, options);
355885d5
MK
291}
292
22410549 293int fsck_walk(struct object *obj, void *data, struct fsck_options *options)
355885d5
MK
294{
295 if (!obj)
296 return -1;
297 switch (obj->type) {
298 case OBJ_BLOB:
299 return 0;
300 case OBJ_TREE:
22410549 301 return fsck_walk_tree((struct tree *)obj, data, options);
355885d5 302 case OBJ_COMMIT:
22410549 303 return fsck_walk_commit((struct commit *)obj, data, options);
355885d5 304 case OBJ_TAG:
22410549 305 return fsck_walk_tag((struct tag *)obj, data, options);
355885d5
MK
306 default:
307 error("Unknown object type for %s", sha1_to_hex(obj->sha1));
308 return -1;
309 }
310}
ba002f3b
MK
311
312/*
313 * The entries in a tree are ordered in the _path_ order,
314 * which means that a directory entry is ordered by adding
315 * a slash to the end of it.
316 *
317 * So a directory called "a" is ordered _after_ a file
318 * called "a.c", because "a/" sorts after "a.c".
319 */
320#define TREE_UNORDERED (-1)
321#define TREE_HAS_DUPS (-2)
322
323static int verify_ordered(unsigned mode1, const char *name1, unsigned mode2, const char *name2)
324{
325 int len1 = strlen(name1);
326 int len2 = strlen(name2);
327 int len = len1 < len2 ? len1 : len2;
328 unsigned char c1, c2;
329 int cmp;
330
331 cmp = memcmp(name1, name2, len);
332 if (cmp < 0)
333 return 0;
334 if (cmp > 0)
335 return TREE_UNORDERED;
336
337 /*
338 * Ok, the first <len> characters are the same.
339 * Now we need to order the next one, but turn
340 * a '\0' into a '/' for a directory entry.
341 */
342 c1 = name1[len];
343 c2 = name2[len];
344 if (!c1 && !c2)
345 /*
346 * git-write-tree used to write out a nonsense tree that has
347 * entries with the same name, one blob and one tree. Make
348 * sure we do not have duplicate entries.
349 */
350 return TREE_HAS_DUPS;
351 if (!c1 && S_ISDIR(mode1))
352 c1 = '/';
353 if (!c2 && S_ISDIR(mode2))
354 c2 = '/';
355 return c1 < c2 ? 0 : TREE_UNORDERED;
356}
357
22410549 358static int fsck_tree(struct tree *item, struct fsck_options *options)
ba002f3b
MK
359{
360 int retval;
c479d14a 361 int has_null_sha1 = 0;
ba002f3b
MK
362 int has_full_path = 0;
363 int has_empty_name = 0;
5d34a435
JK
364 int has_dot = 0;
365 int has_dotdot = 0;
5c17f512 366 int has_dotgit = 0;
ba002f3b
MK
367 int has_zero_pad = 0;
368 int has_bad_modes = 0;
369 int has_dup_entries = 0;
370 int not_properly_sorted = 0;
371 struct tree_desc desc;
372 unsigned o_mode;
373 const char *o_name;
ba002f3b
MK
374
375 init_tree_desc(&desc, item->buffer, item->size);
376
377 o_mode = 0;
378 o_name = NULL;
ba002f3b
MK
379
380 while (desc.size) {
381 unsigned mode;
382 const char *name;
c479d14a 383 const unsigned char *sha1;
ba002f3b 384
c479d14a 385 sha1 = tree_entry_extract(&desc, &name, &mode);
ba002f3b 386
effd12ec
HS
387 has_null_sha1 |= is_null_sha1(sha1);
388 has_full_path |= !!strchr(name, '/');
389 has_empty_name |= !*name;
390 has_dot |= !strcmp(name, ".");
391 has_dotdot |= !strcmp(name, "..");
5e519fb8
JH
392 has_dotgit |= (!strcmp(name, ".git") ||
393 is_hfs_dotgit(name) ||
394 is_ntfs_dotgit(name));
ba002f3b
MK
395 has_zero_pad |= *(char *)desc.buffer == '0';
396 update_tree_entry(&desc);
397
398 switch (mode) {
399 /*
400 * Standard modes..
401 */
402 case S_IFREG | 0755:
403 case S_IFREG | 0644:
404 case S_IFLNK:
405 case S_IFDIR:
406 case S_IFGITLINK:
407 break;
408 /*
409 * This is nonstandard, but we had a few of these
410 * early on when we honored the full set of mode
411 * bits..
412 */
413 case S_IFREG | 0664:
22410549 414 if (!options->strict)
ba002f3b
MK
415 break;
416 default:
417 has_bad_modes = 1;
418 }
419
420 if (o_name) {
421 switch (verify_ordered(o_mode, o_name, mode, name)) {
422 case TREE_UNORDERED:
423 not_properly_sorted = 1;
424 break;
425 case TREE_HAS_DUPS:
426 has_dup_entries = 1;
427 break;
428 default:
429 break;
430 }
431 }
432
433 o_mode = mode;
434 o_name = name;
ba002f3b
MK
435 }
436
437 retval = 0;
c479d14a 438 if (has_null_sha1)
c99ba492 439 retval += report(options, &item->object, FSCK_MSG_NULL_SHA1, "contains entries pointing to null sha1");
ba002f3b 440 if (has_full_path)
c99ba492 441 retval += report(options, &item->object, FSCK_MSG_FULL_PATHNAME, "contains full pathnames");
ba002f3b 442 if (has_empty_name)
c99ba492 443 retval += report(options, &item->object, FSCK_MSG_EMPTY_NAME, "contains empty pathname");
5d34a435 444 if (has_dot)
c99ba492 445 retval += report(options, &item->object, FSCK_MSG_HAS_DOT, "contains '.'");
5d34a435 446 if (has_dotdot)
c99ba492 447 retval += report(options, &item->object, FSCK_MSG_HAS_DOTDOT, "contains '..'");
5c17f512 448 if (has_dotgit)
c99ba492 449 retval += report(options, &item->object, FSCK_MSG_HAS_DOTGIT, "contains '.git'");
ba002f3b 450 if (has_zero_pad)
c99ba492 451 retval += report(options, &item->object, FSCK_MSG_ZERO_PADDED_FILEMODE, "contains zero-padded file modes");
ba002f3b 452 if (has_bad_modes)
c99ba492 453 retval += report(options, &item->object, FSCK_MSG_BAD_FILEMODE, "contains bad file modes");
ba002f3b 454 if (has_dup_entries)
c99ba492 455 retval += report(options, &item->object, FSCK_MSG_DUPLICATE_ENTRIES, "contains duplicate file entries");
ba002f3b 456 if (not_properly_sorted)
c99ba492 457 retval += report(options, &item->object, FSCK_MSG_TREE_NOT_SORTED, "not properly sorted");
ba002f3b
MK
458 return retval;
459}
460
4d0d8975 461static int require_end_of_header(const void *data, unsigned long size,
22410549 462 struct object *obj, struct fsck_options *options)
4d0d8975
JS
463{
464 const char *buffer = (const char *)data;
465 unsigned long i;
466
467 for (i = 0; i < size; i++) {
468 switch (buffer[i]) {
469 case '\0':
c99ba492
JS
470 return report(options, obj,
471 FSCK_MSG_NUL_IN_HEADER,
472 "unterminated header: NUL at offset %ld", i);
4d0d8975
JS
473 case '\n':
474 if (i + 1 < size && buffer[i + 1] == '\n')
475 return 0;
476 }
477 }
478
c99ba492
JS
479 return report(options, obj,
480 FSCK_MSG_UNTERMINATED_HEADER, "unterminated header");
4d0d8975
JS
481}
482
22410549 483static int fsck_ident(const char **ident, struct object *obj, struct fsck_options *options)
daae1922 484{
e6826e33 485 const char *p = *ident;
d4b8de04
JK
486 char *end;
487
e6826e33
JS
488 *ident = strchrnul(*ident, '\n');
489 if (**ident == '\n')
490 (*ident)++;
491
492 if (*p == '<')
c99ba492 493 return report(options, obj, FSCK_MSG_MISSING_NAME_BEFORE_EMAIL, "invalid author/committer line - missing space before email");
e6826e33
JS
494 p += strcspn(p, "<>\n");
495 if (*p == '>')
c99ba492 496 return report(options, obj, FSCK_MSG_BAD_NAME, "invalid author/committer line - bad name");
e6826e33 497 if (*p != '<')
c99ba492 498 return report(options, obj, FSCK_MSG_MISSING_EMAIL, "invalid author/committer line - missing email");
e6826e33 499 if (p[-1] != ' ')
c99ba492 500 return report(options, obj, FSCK_MSG_MISSING_SPACE_BEFORE_EMAIL, "invalid author/committer line - missing space before email");
e6826e33
JS
501 p++;
502 p += strcspn(p, "<>\n");
503 if (*p != '>')
c99ba492 504 return report(options, obj, FSCK_MSG_BAD_EMAIL, "invalid author/committer line - bad email");
e6826e33
JS
505 p++;
506 if (*p != ' ')
c99ba492 507 return report(options, obj, FSCK_MSG_MISSING_SPACE_BEFORE_DATE, "invalid author/committer line - missing space before date");
e6826e33
JS
508 p++;
509 if (*p == '0' && p[1] != ' ')
c99ba492 510 return report(options, obj, FSCK_MSG_ZERO_PADDED_DATE, "invalid author/committer line - zero-padded date");
e6826e33 511 if (date_overflows(strtoul(p, &end, 10)))
c99ba492 512 return report(options, obj, FSCK_MSG_BAD_DATE_OVERFLOW, "invalid author/committer line - date causes integer overflow");
e6826e33 513 if ((end == p || *end != ' '))
c99ba492 514 return report(options, obj, FSCK_MSG_BAD_DATE, "invalid author/committer line - bad date");
e6826e33
JS
515 p = end + 1;
516 if ((*p != '+' && *p != '-') ||
517 !isdigit(p[1]) ||
518 !isdigit(p[2]) ||
519 !isdigit(p[3]) ||
520 !isdigit(p[4]) ||
521 (p[5] != '\n'))
c99ba492 522 return report(options, obj, FSCK_MSG_BAD_TIMEZONE, "invalid author/committer line - bad time zone");
e6826e33 523 p += 6;
daae1922
JN
524 return 0;
525}
526
bc6b8fc1 527static int fsck_commit_buffer(struct commit *commit, const char *buffer,
22410549 528 unsigned long size, struct fsck_options *options)
ba002f3b 529{
ba002f3b
MK
530 unsigned char tree_sha1[20], sha1[20];
531 struct commit_graft *graft;
9d02150c 532 unsigned parent_count, parent_line_count = 0;
daae1922 533 int err;
ba002f3b 534
22410549 535 if (require_end_of_header(buffer, size, &commit->object, options))
4d0d8975
JS
536 return -1;
537
cf4fff57 538 if (!skip_prefix(buffer, "tree ", &buffer))
c99ba492 539 return report(options, &commit->object, FSCK_MSG_MISSING_TREE, "invalid format - expected 'tree' line");
2d820a61 540 if (get_sha1_hex(buffer, tree_sha1) || buffer[40] != '\n')
c99ba492 541 return report(options, &commit->object, FSCK_MSG_BAD_TREE_SHA1, "invalid 'tree' line format - bad sha1");
2d820a61 542 buffer += 41;
cf4fff57 543 while (skip_prefix(buffer, "parent ", &buffer)) {
2d820a61 544 if (get_sha1_hex(buffer, sha1) || buffer[40] != '\n')
c99ba492 545 return report(options, &commit->object, FSCK_MSG_BAD_PARENT_SHA1, "invalid 'parent' line format - bad sha1");
2d820a61 546 buffer += 41;
9d02150c 547 parent_line_count++;
ba002f3b
MK
548 }
549 graft = lookup_commit_graft(commit->object.sha1);
9d02150c 550 parent_count = commit_list_count(commit->parents);
ba002f3b 551 if (graft) {
9d02150c 552 if (graft->nr_parent == -1 && !parent_count)
ba002f3b 553 ; /* shallow commit */
9d02150c 554 else if (graft->nr_parent != parent_count)
c99ba492 555 return report(options, &commit->object, FSCK_MSG_MISSING_GRAFT, "graft objects missing");
ba002f3b 556 } else {
9d02150c 557 if (parent_count != parent_line_count)
c99ba492 558 return report(options, &commit->object, FSCK_MSG_MISSING_PARENT, "parent objects missing");
ba002f3b 559 }
cf4fff57 560 if (!skip_prefix(buffer, "author ", &buffer))
c99ba492 561 return report(options, &commit->object, FSCK_MSG_MISSING_AUTHOR, "invalid format - expected 'author' line");
22410549 562 err = fsck_ident(&buffer, &commit->object, options);
daae1922
JN
563 if (err)
564 return err;
cf4fff57 565 if (!skip_prefix(buffer, "committer ", &buffer))
c99ba492 566 return report(options, &commit->object, FSCK_MSG_MISSING_COMMITTER, "invalid format - expected 'committer' line");
22410549 567 err = fsck_ident(&buffer, &commit->object, options);
daae1922
JN
568 if (err)
569 return err;
ba002f3b 570 if (!commit->tree)
c99ba492 571 return report(options, &commit->object, FSCK_MSG_BAD_TREE, "could not load commit's tree %s", sha1_to_hex(tree_sha1));
ba002f3b
MK
572
573 return 0;
574}
575
90a398bb 576static int fsck_commit(struct commit *commit, const char *data,
22410549 577 unsigned long size, struct fsck_options *options)
bc6b8fc1 578{
90a398bb 579 const char *buffer = data ? data : get_commit_buffer(commit, &size);
22410549 580 int ret = fsck_commit_buffer(commit, buffer, size, options);
90a398bb
JS
581 if (!data)
582 unuse_commit_buffer(commit, buffer);
bc6b8fc1
JK
583 return ret;
584}
585
cec097be 586static int fsck_tag_buffer(struct tag *tag, const char *data,
22410549 587 unsigned long size, struct fsck_options *options)
cec097be
JS
588{
589 unsigned char sha1[20];
590 int ret = 0;
591 const char *buffer;
592 char *to_free = NULL, *eol;
593 struct strbuf sb = STRBUF_INIT;
594
595 if (data)
596 buffer = data;
597 else {
598 enum object_type type;
599
600 buffer = to_free =
601 read_sha1_file(tag->object.sha1, &type, &size);
602 if (!buffer)
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JS
603 return report(options, &tag->object,
604 FSCK_MSG_MISSING_TAG_OBJECT,
cec097be
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605 "cannot read tag object");
606
607 if (type != OBJ_TAG) {
c99ba492
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608 ret = report(options, &tag->object,
609 FSCK_MSG_TAG_OBJECT_NOT_TAG,
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610 "expected tag got %s",
611 typename(type));
612 goto done;
613 }
614 }
615
22410549 616 if (require_end_of_header(buffer, size, &tag->object, options))
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JS
617 goto done;
618
619 if (!skip_prefix(buffer, "object ", &buffer)) {
c99ba492 620 ret = report(options, &tag->object, FSCK_MSG_MISSING_OBJECT, "invalid format - expected 'object' line");
cec097be
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621 goto done;
622 }
623 if (get_sha1_hex(buffer, sha1) || buffer[40] != '\n') {
c99ba492 624 ret = report(options, &tag->object, FSCK_MSG_BAD_OBJECT_SHA1, "invalid 'object' line format - bad sha1");
cec097be
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625 goto done;
626 }
627 buffer += 41;
628
629 if (!skip_prefix(buffer, "type ", &buffer)) {
c99ba492 630 ret = report(options, &tag->object, FSCK_MSG_MISSING_TYPE_ENTRY, "invalid format - expected 'type' line");
cec097be
JS
631 goto done;
632 }
633 eol = strchr(buffer, '\n');
634 if (!eol) {
c99ba492 635 ret = report(options, &tag->object, FSCK_MSG_MISSING_TYPE, "invalid format - unexpected end after 'type' line");
cec097be
JS
636 goto done;
637 }
638 if (type_from_string_gently(buffer, eol - buffer, 1) < 0)
c99ba492 639 ret = report(options, &tag->object, FSCK_MSG_BAD_TYPE, "invalid 'type' value");
cec097be
JS
640 if (ret)
641 goto done;
642 buffer = eol + 1;
643
644 if (!skip_prefix(buffer, "tag ", &buffer)) {
c99ba492 645 ret = report(options, &tag->object, FSCK_MSG_MISSING_TAG_ENTRY, "invalid format - expected 'tag' line");
cec097be
JS
646 goto done;
647 }
648 eol = strchr(buffer, '\n');
649 if (!eol) {
c99ba492 650 ret = report(options, &tag->object, FSCK_MSG_MISSING_TAG, "invalid format - unexpected end after 'type' line");
cec097be
JS
651 goto done;
652 }
653 strbuf_addf(&sb, "refs/tags/%.*s", (int)(eol - buffer), buffer);
654 if (check_refname_format(sb.buf, 0))
c99ba492
JS
655 report(options, &tag->object, FSCK_MSG_BAD_TAG_NAME,
656 "invalid 'tag' name: %.*s",
7add4419 657 (int)(eol - buffer), buffer);
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JS
658 buffer = eol + 1;
659
660 if (!skip_prefix(buffer, "tagger ", &buffer))
661 /* early tags do not contain 'tagger' lines; warn only */
c99ba492 662 report(options, &tag->object, FSCK_MSG_MISSING_TAGGER_ENTRY, "invalid format - expected 'tagger' line");
cec097be 663 else
22410549 664 ret = fsck_ident(&buffer, &tag->object, options);
cec097be
JS
665
666done:
667 strbuf_release(&sb);
668 free(to_free);
669 return ret;
670}
671
90a398bb 672static int fsck_tag(struct tag *tag, const char *data,
22410549 673 unsigned long size, struct fsck_options *options)
ba002f3b
MK
674{
675 struct object *tagged = tag->tagged;
676
677 if (!tagged)
c99ba492 678 return report(options, &tag->object, FSCK_MSG_BAD_TAG_OBJECT, "could not load tagged object");
cec097be 679
22410549 680 return fsck_tag_buffer(tag, data, size, options);
ba002f3b
MK
681}
682
90a398bb 683int fsck_object(struct object *obj, void *data, unsigned long size,
22410549 684 struct fsck_options *options)
ba002f3b
MK
685{
686 if (!obj)
c99ba492 687 return report(options, obj, FSCK_MSG_BAD_OBJECT_SHA1, "no valid object to fsck");
ba002f3b
MK
688
689 if (obj->type == OBJ_BLOB)
690 return 0;
691 if (obj->type == OBJ_TREE)
22410549 692 return fsck_tree((struct tree *) obj, options);
ba002f3b 693 if (obj->type == OBJ_COMMIT)
90a398bb 694 return fsck_commit((struct commit *) obj, (const char *) data,
22410549 695 size, options);
ba002f3b 696 if (obj->type == OBJ_TAG)
90a398bb 697 return fsck_tag((struct tag *) obj, (const char *) data,
22410549 698 size, options);
ba002f3b 699
c99ba492 700 return report(options, obj, FSCK_MSG_UNKNOWN_TYPE, "unknown type '%d' (internal fsck error)",
ba002f3b
MK
701 obj->type);
702}
d6ffc8d7 703
c99ba492 704int fsck_error_function(struct object *obj, int msg_type, const char *message)
d6ffc8d7 705{
0282f4dc
JS
706 if (msg_type == FSCK_WARN) {
707 warning("object %s: %s", sha1_to_hex(obj->sha1), message);
708 return 0;
709 }
c99ba492 710 error("object %s: %s", sha1_to_hex(obj->sha1), message);
d6ffc8d7
MK
711 return 1;
712}