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Date:: Fri Nov 16 08:49:09 2018 UTC
Message:: remove unused declarations
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1 /*
2  * Copyright (c) 2018 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/stat.h>
19 #include <sys/queue.h>
20 #include <sys/uio.h>
21 #include <sys/socket.h>
22 #include <sys/syslimits.h>
23 #include <sys/wait.h>
24 
25 #include <errno.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <stdint.h>
30 #include <sha1.h>
31 #include <zlib.h>
32 #include <ctype.h>
33 #include <limits.h>
34 #include <imsg.h>
35 #include <time.h>
36 #include <unistd.h>
37 
38 #include "got_error.h"
39 #include "got_object.h"
40 #include "got_repository.h"
41 #include "got_opentemp.h"
42 
43 #include "got_lib_sha1.h"
44 #include "got_lib_delta.h"
45 #include "got_lib_privsep.h"
46 #include "got_lib_pack.h"
47 #include "got_lib_inflate.h"
48 #include "got_lib_object.h"
49 #include "got_lib_object_cache.h"
50 #include "got_lib_repository.h"
51 
52 #ifndef nitems
53 #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
54 #endif
55 
56 #define GOT_COMMIT_TAG_TREE		"tree "
57 #define GOT_COMMIT_TAG_PARENT		"parent "
58 #define GOT_COMMIT_TAG_AUTHOR		"author "
59 #define GOT_COMMIT_TAG_COMMITTER	"committer "
60 
61 int
62 got_object_id_cmp(const struct got_object_id *id1,
63     const struct got_object_id *id2)
64 {
65 	return memcmp(id1->sha1, id2->sha1, SHA1_DIGEST_LENGTH);
66 }
67 
68 const struct got_error *
69 got_object_qid_alloc_partial(struct got_object_qid **qid)
70 {
71 	const struct got_error *err = NULL;
72 
73 	*qid = malloc(sizeof(**qid));
74 	if (*qid == NULL)
75 		return got_error_from_errno();
76 
77 	(*qid)->id = malloc(sizeof(*((*qid)->id)));
78 	if ((*qid)->id == NULL) {
79 		err = got_error_from_errno();
80 		got_object_qid_free(*qid);
81 		*qid = NULL;
82 		return err;
83 	}
84 
85 	return NULL;
86 }
87 
88 const struct got_error *
89 got_object_id_str(char **outbuf, struct got_object_id *id)
90 {
91 	static const size_t len = SHA1_DIGEST_STRING_LENGTH;
92 
93 	*outbuf = malloc(len);
94 	if (*outbuf == NULL)
95 		return got_error_from_errno();
96 
97 	if (got_sha1_digest_to_str(id->sha1, *outbuf, len) == NULL) {
98 		free(*outbuf);
99 		*outbuf = NULL;
100 		return got_error(GOT_ERR_BAD_OBJ_ID_STR);
101 	}
102 
103 	return NULL;
104 }
105 
106 void
107 got_object_close(struct got_object *obj)
108 {
109 	if (obj->refcnt > 0) {
110 		obj->refcnt--;
111 		if (obj->refcnt > 0)
112 			return;
113 	}
114 
115 	if (obj->flags & GOT_OBJ_FLAG_DELTIFIED) {
116 		struct got_delta *delta;
117 		while (!SIMPLEQ_EMPTY(&obj->deltas.entries)) {
118 			delta = SIMPLEQ_FIRST(&obj->deltas.entries);
119 			SIMPLEQ_REMOVE_HEAD(&obj->deltas.entries, entry);
120 			got_delta_close(delta);
121 		}
122 	}
123 	if (obj->flags & GOT_OBJ_FLAG_PACKED)
124 		free(obj->path_packfile);
125 	free(obj);
126 }
127 
128 void
129 got_object_qid_free(struct got_object_qid *qid)
130 {
131 	free(qid->id);
132 	free(qid);
133 }
134 
135 struct got_commit_object *
136 got_object_commit_alloc_partial(void)
137 {
138 	struct got_commit_object *commit;
139 
140 	commit = calloc(1, sizeof(*commit));
141 	if (commit == NULL)
142 		return NULL;
143 	commit->tree_id = malloc(sizeof(*commit->tree_id));
144 	if (commit->tree_id == NULL) {
145 		free(commit);
146 		return NULL;
147 	}
148 
149 	SIMPLEQ_INIT(&commit->parent_ids);
150 
151 	return commit;
152 }
153 
154 const struct got_error *
155 got_object_commit_add_parent(struct got_commit_object *commit,
156     const char *id_str)
157 {
158 	const struct got_error *err = NULL;
159 	struct got_object_qid *qid;
160 
161 	err = got_object_qid_alloc_partial(&qid);
162 	if (err)
163 		return err;
164 
165 	if (!got_parse_sha1_digest(qid->id->sha1, id_str)) {
166 		err = got_error(GOT_ERR_BAD_OBJ_DATA);
167 		free(qid->id);
168 		free(qid);
169 		return err;
170 	}
171 
172 	SIMPLEQ_INSERT_TAIL(&commit->parent_ids, qid, entry);
173 	commit->nparents++;
174 
175 	return NULL;
176 }
177 
178 static const struct got_error *
179 parse_gmtoff(time_t *gmtoff, const char *tzstr)
180 {
181 	int sign = 1;
182 	const char *p = tzstr;
183 	time_t h, m;
184 
185 	*gmtoff = 0;
186 
187 	if (*p == '-')
188 		sign = -1;
189 	else if (*p != '+')
190 		return got_error(GOT_ERR_BAD_OBJ_DATA);
191 	p++;
192 	if (!isdigit(*p) && !isdigit(*(p + 1)))
193 		return got_error(GOT_ERR_BAD_OBJ_DATA);
194 	h = (((*p - '0') * 10) + (*(p + 1) - '0'));
195 
196 	p += 2;
197 	if (!isdigit(*p) && !isdigit(*(p + 1)))
198 		return got_error(GOT_ERR_BAD_OBJ_DATA);
199 	m = ((*p - '0') * 10) + (*(p + 1) - '0');
200 
201 	*gmtoff = (h * 60 * 60 + m * 60) * sign;
202 	return NULL;
203 }
204 
205 static const struct got_error *
206 parse_commit_time(time_t *time, time_t *gmtoff, char *committer)
207 {
208 	const struct got_error *err = NULL;
209 	const char *errstr;
210 	char *space, *tzstr;
211 
212 	/* Parse and strip off trailing timezone indicator string. */
213 	space = strrchr(committer, ' ');
214 	if (space == NULL)
215 		return got_error(GOT_ERR_BAD_OBJ_DATA);
216 	tzstr = strdup(space + 1);
217 	if (tzstr == NULL)
218 		return got_error_from_errno();
219 	err = parse_gmtoff(gmtoff, tzstr);
220 	free(tzstr);
221 	if (err)
222 		return err;
223 	*space = '\0';
224 
225 	/* Timestamp is separated from committer name + email by space. */
226 	space = strrchr(committer, ' ');
227 	if (space == NULL)
228 		return got_error(GOT_ERR_BAD_OBJ_DATA);
229 
230 	/* Timestamp parsed here is expressed in comitter's local time. */
231 	*time = strtonum(space + 1, 0, INT64_MAX, &errstr);
232 	if (errstr)
233 		return got_error(GOT_ERR_BAD_OBJ_DATA);
234 
235 	/* Express the time stamp in UTC. */
236 	*time -= *gmtoff;
237 
238 	/* Strip off parsed time information, leaving just author and email. */
239 	*space = '\0';
240 
241 	return NULL;
242 }
243 
244 void
245 got_object_commit_close(struct got_commit_object *commit)
246 {
247 	struct got_object_qid *qid;
248 
249 	if (commit->refcnt > 0) {
250 		commit->refcnt--;
251 		if (commit->refcnt > 0)
252 			return;
253 	}
254 
255 	while (!SIMPLEQ_EMPTY(&commit->parent_ids)) {
256 		qid = SIMPLEQ_FIRST(&commit->parent_ids);
257 		SIMPLEQ_REMOVE_HEAD(&commit->parent_ids, entry);
258 		got_object_qid_free(qid);
259 	}
260 
261 	free(commit->tree_id);
262 	free(commit->author);
263 	free(commit->committer);
264 	free(commit->logmsg);
265 	free(commit);
266 }
267 
268 const struct got_error *
269 got_object_parse_commit(struct got_commit_object **commit, char *buf, size_t len)
270 {
271 	const struct got_error *err = NULL;
272 	char *s = buf;
273 	size_t tlen;
274 	ssize_t remain = (ssize_t)len;
275  
276 	*commit = got_object_commit_alloc_partial();
277 	if (*commit == NULL)
278 		return got_error_from_errno();
279 
280 	tlen = strlen(GOT_COMMIT_TAG_TREE);
281 	if (strncmp(s, GOT_COMMIT_TAG_TREE, tlen) == 0) {
282 		remain -= tlen;
283 		if (remain < SHA1_DIGEST_STRING_LENGTH) {
284 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
285 			goto done;
286 		}
287 		s += tlen;
288 		if (!got_parse_sha1_digest((*commit)->tree_id->sha1, s)) {
289 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
290 			goto done;
291 		}
292 		remain -= SHA1_DIGEST_STRING_LENGTH;
293 		s += SHA1_DIGEST_STRING_LENGTH;
294 	} else {
295 		err = got_error(GOT_ERR_BAD_OBJ_DATA);
296 		goto done;
297 	}
298 
299 	tlen = strlen(GOT_COMMIT_TAG_PARENT);
300 	while (strncmp(s, GOT_COMMIT_TAG_PARENT, tlen) == 0) {
301 		remain -= tlen;
302 		if (remain < SHA1_DIGEST_STRING_LENGTH) {
303 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
304 			goto done;
305 		}
306 		s += tlen;
307 		err = got_object_commit_add_parent(*commit, s);
308 		if (err)
309 			goto done;
310 
311 		remain -= SHA1_DIGEST_STRING_LENGTH;
312 		s += SHA1_DIGEST_STRING_LENGTH;
313 	}
314 
315 	tlen = strlen(GOT_COMMIT_TAG_AUTHOR);
316 	if (strncmp(s, GOT_COMMIT_TAG_AUTHOR, tlen) == 0) {
317 		char *p;
318 		size_t slen;
319 
320 		remain -= tlen;
321 		if (remain <= 0) {
322 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
323 			goto done;
324 		}
325 		s += tlen;
326 		p = strchr(s, '\n');
327 		if (p == NULL) {
328 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
329 			goto done;
330 		}
331 		*p = '\0';
332 		slen = strlen(s);
333 		err = parse_commit_time(&(*commit)->author_time,
334 		    &(*commit)->author_gmtoff, s);
335 		if (err)
336 			goto done;
337 		(*commit)->author = strdup(s);
338 		if ((*commit)->author == NULL) {
339 			err = got_error_from_errno();
340 			goto done;
341 		}
342 		s += slen + 1;
343 		remain -= slen + 1;
344 	}
345 
346 	tlen = strlen(GOT_COMMIT_TAG_COMMITTER);
347 	if (strncmp(s, GOT_COMMIT_TAG_COMMITTER, tlen) == 0) {
348 		char *p;
349 		size_t slen;
350 
351 		remain -= tlen;
352 		if (remain <= 0) {
353 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
354 			goto done;
355 		}
356 		s += tlen;
357 		p = strchr(s, '\n');
358 		if (p == NULL) {
359 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
360 			goto done;
361 		}
362 		*p = '\0';
363 		slen = strlen(s);
364 		err = parse_commit_time(&(*commit)->committer_time,
365 		    &(*commit)->committer_gmtoff, s);
366 		if (err)
367 			goto done;
368 		(*commit)->committer = strdup(s);
369 		if ((*commit)->committer == NULL) {
370 			err = got_error_from_errno();
371 			goto done;
372 		}
373 		s += slen + 1;
374 		remain -= slen + 1;
375 	}
376 
377 	(*commit)->logmsg = strndup(s, remain);
378 	if ((*commit)->logmsg == NULL) {
379 		err = got_error_from_errno();
380 		goto done;
381 	}
382 done:
383 	if (err) {
384 		got_object_commit_close(*commit);
385 		*commit = NULL;
386 	}
387 	return err;
388 }
389 
390 void
391 got_object_tree_entry_close(struct got_tree_entry *te)
392 {
393 	free(te->id);
394 	free(te->name);
395 	free(te);
396 }
397 
398 void
399 got_object_tree_close(struct got_tree_object *tree)
400 {
401 	struct got_tree_entry *te;
402 
403 	if (tree->refcnt > 0) {
404 		tree->refcnt--;
405 		if (tree->refcnt > 0)
406 			return;
407 	}
408 
409 	while (!SIMPLEQ_EMPTY(&tree->entries.head)) {
410 		te = SIMPLEQ_FIRST(&tree->entries.head);
411 		SIMPLEQ_REMOVE_HEAD(&tree->entries.head, entry);
412 		got_object_tree_entry_close(te);
413 	}
414 
415 	free(tree);
416 }
417 
418 struct got_tree_entry *
419 got_alloc_tree_entry_partial(void)
420 {
421 	struct got_tree_entry *te;
422 
423 	te = malloc(sizeof(*te));
424 	if (te == NULL)
425 		return NULL;
426 
427 	te->id = malloc(sizeof(*te->id));
428 	if (te->id == NULL) {
429 		free(te);
430 		te = NULL;
431 	}
432 	return te;
433 }
434 
435 static const struct got_error *
436 parse_tree_entry(struct got_tree_entry **te, size_t *elen, char *buf,
437     size_t maxlen)
438 {
439 	char *p = buf, *space;
440 	const struct got_error *err = NULL;
441 
442 	*te = got_alloc_tree_entry_partial();
443 	if (*te == NULL)
444 		return got_error_from_errno();
445 
446 	*elen = strlen(buf) + 1;
447 	if (*elen > maxlen) {
448 		free(*te);
449 		*te = NULL;
450 		return got_error(GOT_ERR_BAD_OBJ_DATA);
451 	}
452 
453 	space = strchr(buf, ' ');
454 	if (space == NULL) {
455 		err = got_error(GOT_ERR_BAD_OBJ_DATA);
456 		free(*te);
457 		*te = NULL;
458 		return err;
459 	}
460 	(*te)->mode = 0;
461 	while (*p != ' ') {
462 		if (*p < '0' && *p > '7') {
463 			err = got_error(GOT_ERR_BAD_OBJ_DATA);
464 			goto done;
465 		}
466 		(*te)->mode <<= 3;
467 		(*te)->mode |= *p - '0';
468 		p++;
469 	}
470 
471 	(*te)->name = strdup(space + 1);
472 	if (*elen > maxlen || maxlen - *elen < SHA1_DIGEST_LENGTH) {
473 		err = got_error(GOT_ERR_BAD_OBJ_DATA);
474 		goto done;
475 	}
476 	buf += *elen;
477 	memcpy((*te)->id->sha1, buf, SHA1_DIGEST_LENGTH);
478 	*elen += SHA1_DIGEST_LENGTH;
479 done:
480 	if (err) {
481 		got_object_tree_entry_close(*te);
482 		*te = NULL;
483 	}
484 	return err;
485 }
486 
487 const struct got_error *
488 got_object_parse_tree(struct got_tree_object **tree, uint8_t *buf, size_t len)
489 {
490 	const struct got_error *err;
491 	size_t remain = len;
492 
493 	*tree = calloc(1, sizeof(**tree));
494 	if (*tree == NULL)
495 		return got_error_from_errno();
496 
497 	SIMPLEQ_INIT(&(*tree)->entries.head);
498 
499 	while (remain > 0) {
500 		struct got_tree_entry *te;
501 		size_t elen;
502 
503 		err = parse_tree_entry(&te, &elen, buf, remain);
504 		if (err)
505 			return err;
506 		(*tree)->entries.nentries++;
507 		SIMPLEQ_INSERT_TAIL(&(*tree)->entries.head, te, entry);
508 		buf += elen;
509 		remain -= elen;
510 	}
511 
512 	if (remain != 0) {
513 		got_object_tree_close(*tree);
514 		return got_error(GOT_ERR_BAD_OBJ_DATA);
515 	}
516 
517 	return NULL;
518 }
519 
520 const struct got_error *
521 got_read_file_to_mem(uint8_t **outbuf, size_t *outlen, FILE *f)
522 {
523 	const struct got_error *err = NULL;
524 	static const size_t blocksize = 512;
525 	size_t n, total, remain;
526 	uint8_t *buf;
527 
528 	*outbuf = NULL;
529 	*outlen = 0;
530 
531 	buf = malloc(blocksize);
532 	if (buf == NULL)
533 		return got_error_from_errno();
534 
535 	remain = blocksize;
536 	total = 0;
537 	while (1) {
538 		if (remain == 0) {
539 			uint8_t *newbuf;
540 			newbuf = reallocarray(buf, 1, total + blocksize);
541 			if (newbuf == NULL) {
542 				err = got_error_from_errno();
543 				goto done;
544 			}
545 			buf = newbuf;
546 			remain += blocksize;
547 		}
548 		n = fread(buf + total, 1, remain, f);
549 		if (n == 0) {
550 			if (ferror(f)) {
551 				err = got_ferror(f, GOT_ERR_IO);
552 				goto done;
553 			}
554 			break; /* EOF */
555 		}
556 		remain -= n;
557 		total += n;
558 	};
559 
560 done:
561 	if (err == NULL) {
562 		*outbuf = buf;
563 		*outlen = total;
564 	} else
565 		free(buf);
566 	return err;
567 }