2 * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
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.
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.
17 #include <sys/types.h>
19 #include <sys/queue.h>
21 #include <sys/socket.h>
22 #include <sys/syslimits.h>
38 #include "got_error.h"
39 #include "got_object.h"
40 #include "got_repository.h"
41 #include "got_opentemp.h"
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"
53 #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
56 #define GOT_OBJ_TAG_COMMIT "commit"
57 #define GOT_OBJ_TAG_TREE "tree"
58 #define GOT_OBJ_TAG_BLOB "blob"
60 #define GOT_COMMIT_TAG_TREE "tree "
61 #define GOT_COMMIT_TAG_PARENT "parent "
62 #define GOT_COMMIT_TAG_AUTHOR "author "
63 #define GOT_COMMIT_TAG_COMMITTER "committer "
65 const struct got_error *
66 got_object_id_str(char **outbuf, struct got_object_id *id)
68 static const size_t len = SHA1_DIGEST_STRING_LENGTH;
70 *outbuf = malloc(len);
72 return got_error_from_errno();
74 if (got_sha1_digest_to_str(id->sha1, *outbuf, len) == NULL) {
77 return got_error(GOT_ERR_BAD_OBJ_ID_STR);
84 got_object_close(struct got_object *obj)
86 if (obj->refcnt > 0) {
92 if (obj->flags & GOT_OBJ_FLAG_DELTIFIED) {
93 struct got_delta *delta;
94 while (!SIMPLEQ_EMPTY(&obj->deltas.entries)) {
95 delta = SIMPLEQ_FIRST(&obj->deltas.entries);
96 SIMPLEQ_REMOVE_HEAD(&obj->deltas.entries, entry);
97 got_delta_close(delta);
100 if (obj->flags & GOT_OBJ_FLAG_PACKED)
101 free(obj->path_packfile);
106 got_object_qid_free(struct got_object_qid *qid)
112 struct got_commit_object *
113 got_object_commit_alloc_partial(void)
115 struct got_commit_object *commit;
117 commit = calloc(1, sizeof(*commit));
120 commit->tree_id = calloc(1, sizeof(*commit->tree_id));
121 if (commit->tree_id == NULL) {
126 SIMPLEQ_INIT(&commit->parent_ids);
131 const struct got_error *
132 got_object_commit_add_parent(struct got_commit_object *commit,
135 const struct got_error *err = NULL;
136 struct got_object_qid *qid;
138 qid = malloc(sizeof(*qid));
140 return got_error_from_errno();
142 qid->id = malloc(sizeof(*qid->id));
143 if (qid->id == NULL) {
144 err = got_error_from_errno();
145 got_object_qid_free(qid);
149 if (!got_parse_sha1_digest(qid->id->sha1, id_str)) {
150 err = got_error(GOT_ERR_BAD_OBJ_DATA);
156 SIMPLEQ_INSERT_TAIL(&commit->parent_ids, qid, entry);
162 static const struct got_error *
163 parse_gmtoff(time_t *gmtoff, const char *tzstr)
166 const char *p = tzstr;
174 return got_error(GOT_ERR_BAD_OBJ_DATA);
176 if (!isdigit(*p) && !isdigit(*(p + 1)))
177 return got_error(GOT_ERR_BAD_OBJ_DATA);
178 h = (((*p - '0') * 10) + (*(p + 1) - '0'));
181 if (!isdigit(*p) && !isdigit(*(p + 1)))
182 return got_error(GOT_ERR_BAD_OBJ_DATA);
183 m = ((*p - '0') * 10) + (*(p + 1) - '0');
185 *gmtoff = (h * 60 * 60 + m * 60) * sign;
189 static const struct got_error *
190 parse_commit_time(struct tm *tm, char *committer)
192 const struct got_error *err = NULL;
198 /* Parse and strip off trailing timezone indicator string. */
199 space = strrchr(committer, ' ');
201 return got_error(GOT_ERR_BAD_OBJ_DATA);
202 tzstr = strdup(space + 1);
204 return got_error_from_errno();
205 err = parse_gmtoff(&gmtoff, tzstr);
211 /* Timestamp is separated from committer name + email by space. */
212 space = strrchr(committer, ' ');
214 return got_error(GOT_ERR_BAD_OBJ_DATA);
216 /* Timestamp parsed here is expressed in comitter's local time. */
217 time = strtonum(space + 1, 0, INT64_MAX, &errstr);
219 return got_error(GOT_ERR_BAD_OBJ_DATA);
221 /* Express the time stamp in UTC. */
222 memset(tm, 0, sizeof(*tm));
224 if (localtime_r(&time, tm) == NULL)
225 return got_error_from_errno();
226 tm->tm_gmtoff = gmtoff;
228 /* Strip off parsed time information, leaving just author and email. */
235 got_object_commit_close(struct got_commit_object *commit)
237 struct got_object_qid *qid;
239 if (commit->refcnt > 0) {
241 if (commit->refcnt > 0)
245 while (!SIMPLEQ_EMPTY(&commit->parent_ids)) {
246 qid = SIMPLEQ_FIRST(&commit->parent_ids);
247 SIMPLEQ_REMOVE_HEAD(&commit->parent_ids, entry);
248 got_object_qid_free(qid);
251 free(commit->tree_id);
252 free(commit->author);
253 free(commit->committer);
254 free(commit->logmsg);
258 const struct got_error *
259 got_object_parse_commit(struct got_commit_object **commit, char *buf, size_t len)
261 const struct got_error *err = NULL;
264 ssize_t remain = (ssize_t)len;
266 *commit = got_object_commit_alloc_partial();
268 return got_error_from_errno();
270 tlen = strlen(GOT_COMMIT_TAG_TREE);
271 if (strncmp(s, GOT_COMMIT_TAG_TREE, tlen) == 0) {
273 if (remain < SHA1_DIGEST_STRING_LENGTH) {
274 err = got_error(GOT_ERR_BAD_OBJ_DATA);
278 if (!got_parse_sha1_digest((*commit)->tree_id->sha1, s)) {
279 err = got_error(GOT_ERR_BAD_OBJ_DATA);
282 remain -= SHA1_DIGEST_STRING_LENGTH;
283 s += SHA1_DIGEST_STRING_LENGTH;
285 err = got_error(GOT_ERR_BAD_OBJ_DATA);
289 tlen = strlen(GOT_COMMIT_TAG_PARENT);
290 while (strncmp(s, GOT_COMMIT_TAG_PARENT, tlen) == 0) {
292 if (remain < SHA1_DIGEST_STRING_LENGTH) {
293 err = got_error(GOT_ERR_BAD_OBJ_DATA);
297 err = got_object_commit_add_parent(*commit, s);
301 remain -= SHA1_DIGEST_STRING_LENGTH;
302 s += SHA1_DIGEST_STRING_LENGTH;
305 tlen = strlen(GOT_COMMIT_TAG_AUTHOR);
306 if (strncmp(s, GOT_COMMIT_TAG_AUTHOR, tlen) == 0) {
312 err = got_error(GOT_ERR_BAD_OBJ_DATA);
318 err = got_error(GOT_ERR_BAD_OBJ_DATA);
323 err = parse_commit_time(&(*commit)->tm_author, s);
326 (*commit)->author = strdup(s);
327 if ((*commit)->author == NULL) {
328 err = got_error_from_errno();
335 tlen = strlen(GOT_COMMIT_TAG_COMMITTER);
336 if (strncmp(s, GOT_COMMIT_TAG_COMMITTER, tlen) == 0) {
342 err = got_error(GOT_ERR_BAD_OBJ_DATA);
348 err = got_error(GOT_ERR_BAD_OBJ_DATA);
353 err = parse_commit_time(&(*commit)->tm_committer, s);
356 (*commit)->committer = strdup(s);
357 if ((*commit)->committer == NULL) {
358 err = got_error_from_errno();
365 (*commit)->logmsg = strndup(s, remain);
366 if ((*commit)->logmsg == NULL) {
367 err = got_error_from_errno();
372 got_object_commit_close(*commit);
379 got_object_tree_entry_close(struct got_tree_entry *te)
387 got_object_tree_close(struct got_tree_object *tree)
389 struct got_tree_entry *te;
391 if (tree->refcnt > 0) {
393 if (tree->refcnt > 0)
397 while (!SIMPLEQ_EMPTY(&tree->entries.head)) {
398 te = SIMPLEQ_FIRST(&tree->entries.head);
399 SIMPLEQ_REMOVE_HEAD(&tree->entries.head, entry);
400 got_object_tree_entry_close(te);
406 struct got_tree_entry *
407 got_alloc_tree_entry_partial(void)
409 struct got_tree_entry *te;
411 te = calloc(1, sizeof(*te));
415 te->id = calloc(1, sizeof(*te->id));
416 if (te->id == NULL) {
423 static const struct got_error *
424 parse_tree_entry(struct got_tree_entry **te, size_t *elen, char *buf,
427 char *p = buf, *space;
428 const struct got_error *err = NULL;
430 *te = got_alloc_tree_entry_partial();
432 return got_error_from_errno();
434 *elen = strlen(buf) + 1;
435 if (*elen > maxlen) {
438 return got_error(GOT_ERR_BAD_OBJ_DATA);
441 space = strchr(buf, ' ');
443 err = got_error(GOT_ERR_BAD_OBJ_DATA);
449 if (*p < '0' && *p > '7') {
450 err = got_error(GOT_ERR_BAD_OBJ_DATA);
454 (*te)->mode |= *p - '0';
458 (*te)->name = strdup(space + 1);
459 if (*elen > maxlen || maxlen - *elen < SHA1_DIGEST_LENGTH) {
460 err = got_error(GOT_ERR_BAD_OBJ_DATA);
463 buf += strlen(buf) + 1;
464 memcpy((*te)->id->sha1, buf, SHA1_DIGEST_LENGTH);
465 *elen += SHA1_DIGEST_LENGTH;
468 got_object_tree_entry_close(*te);
474 const struct got_error *
475 got_object_parse_tree(struct got_tree_object **tree, uint8_t *buf, size_t len)
477 const struct got_error *err;
480 *tree = calloc(1, sizeof(**tree));
482 return got_error_from_errno();
484 SIMPLEQ_INIT(&(*tree)->entries.head);
487 struct got_tree_entry *te;
490 err = parse_tree_entry(&te, &elen, buf, remain);
493 (*tree)->entries.nentries++;
494 SIMPLEQ_INSERT_TAIL(&(*tree)->entries.head, te, entry);
500 got_object_tree_close(*tree);
501 return got_error(GOT_ERR_BAD_OBJ_DATA);
507 const struct got_error *
508 got_read_file_to_mem(uint8_t **outbuf, size_t *outlen, FILE *f)
510 const struct got_error *err = NULL;
511 static const size_t blocksize = 512;
512 size_t n, total, remain;
518 buf = malloc(blocksize);
520 return got_error_from_errno();
527 newbuf = reallocarray(buf, 1, total + blocksize);
528 if (newbuf == NULL) {
529 err = got_error_from_errno();
535 n = fread(buf + total, 1, remain, f);
538 err = got_ferror(f, GOT_ERR_IO);