1 /*
2  * Copyright (c) 2018, 2019 Stefan Sperling <stsp@openbsd.org>
3  * Copyright (c) 2019, Ori Bernstein <ori@openbsd.org>
4  *
5  * Permission to use, copy, modify, and distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16  */
17 
18 /*
19  * All code runs under the same UID but sensitive code paths are
20  * run in a separate process with tighter pledge(2) promises.
21  * Data is communicated between processes via imsg_flush(3) and imsg_read(3).
22  * This behaviour is transparent to users of the library.
23  *
24  * We generally transmit data in imsg buffers, split across several messages
25  * if necessary. File descriptors are used in cases where this is impractical,
26  * such as when accessing pack files or when transferring large blobs.
27  *
28  * We exec(2) after a fork(2). Parts of our library functionality are
29  * accessible via separate executables in a libexec directory.
30  */
31 
32 #define GOT_IMSG_FD_CHILD (STDERR_FILENO + 1)
33 
34 #ifndef GOT_LIBEXECDIR
35 #define GOT_LIBEXECDIR /usr/local/bin
36 #endif
37 
38 /* Names of helper programs in libexec directory */
39 #define GOT_PROG_READ_OBJECT	got-read-object
40 #define GOT_PROG_READ_TREE	got-read-tree
41 #define GOT_PROG_READ_COMMIT	got-read-commit
42 #define GOT_PROG_READ_BLOB	got-read-blob
43 #define GOT_PROG_READ_TAG	got-read-tag
44 #define GOT_PROG_READ_PACK	got-read-pack
45 #define GOT_PROG_READ_GITCONFIG	got-read-gitconfig
46 #define GOT_PROG_READ_GOTCONFIG	got-read-gotconfig
47 #define GOT_PROG_FETCH_PACK	got-fetch-pack
48 #define GOT_PROG_INDEX_PACK	got-index-pack
49 #define GOT_PROG_SEND_PACK	got-send-pack
50 
51 #define GOT_STRINGIFY(x) #x
52 #define GOT_STRINGVAL(x) GOT_STRINGIFY(x)
53 
54 /* Paths to helper programs in libexec directory */
55 #define GOT_PATH_PROG_READ_OBJECT \
56 	GOT_STRINGVAL(GOT_LIBEXECDIR) "/" GOT_STRINGVAL(GOT_PROG_READ_OBJECT)
57 #define GOT_PATH_PROG_READ_TREE \
58 	GOT_STRINGVAL(GOT_LIBEXECDIR) "/" GOT_STRINGVAL(GOT_PROG_READ_TREE)
59 #define GOT_PATH_PROG_READ_COMMIT \
60 	GOT_STRINGVAL(GOT_LIBEXECDIR) "/" GOT_STRINGVAL(GOT_PROG_READ_COMMIT)
61 #define GOT_PATH_PROG_READ_BLOB \
62 	GOT_STRINGVAL(GOT_LIBEXECDIR) "/" GOT_STRINGVAL(GOT_PROG_READ_BLOB)
63 #define GOT_PATH_PROG_READ_TAG \
64 	GOT_STRINGVAL(GOT_LIBEXECDIR) "/" GOT_STRINGVAL(GOT_PROG_READ_TAG)
65 #define GOT_PATH_PROG_READ_PACK \
66 	GOT_STRINGVAL(GOT_LIBEXECDIR) "/" GOT_STRINGVAL(GOT_PROG_READ_PACK)
67 #define GOT_PATH_PROG_READ_GITCONFIG \
68 	GOT_STRINGVAL(GOT_LIBEXECDIR) "/" GOT_STRINGVAL(GOT_PROG_READ_GITCONFIG)
69 #define GOT_PATH_PROG_READ_GOTCONFIG \
70 	GOT_STRINGVAL(GOT_LIBEXECDIR) "/" GOT_STRINGVAL(GOT_PROG_READ_GOTCONFIG)
71 #define GOT_PATH_PROG_FETCH_PACK \
72 	GOT_STRINGVAL(GOT_LIBEXECDIR) "/" GOT_STRINGVAL(GOT_PROG_FETCH_PACK)
73 #define GOT_PATH_PROG_SEND_PACK \
74 	GOT_STRINGVAL(GOT_LIBEXECDIR) "/" GOT_STRINGVAL(GOT_PROG_SEND_PACK)
75 #define GOT_PATH_PROG_INDEX_PACK \
76 	GOT_STRINGVAL(GOT_LIBEXECDIR) "/" GOT_STRINGVAL(GOT_PROG_INDEX_PACK)
77 
78 struct got_privsep_child {
79 	int imsg_fd;
80 	pid_t pid;
81 	struct imsgbuf *ibuf;
82 };
83 
84 enum got_imsg_type {
85 	/* An error occured while processing a request. */
86 	GOT_IMSG_ERROR,
87 
88 	/* Stop the child process. */
89 	GOT_IMSG_STOP,
90 
91 	/*
92 	 * Messages concerned with read access to objects in a repository.
93 	 * Object and pack files are opened by the main process, where
94 	 * data may be read as a byte string but without any interpretation.
95 	 * Decompression and parsing of object and pack files occurs in a
96 	 * separate process which runs under pledge("stdio recvfd").
97 	 * This sandboxes our own repository parsing code, as well as zlib.
98 	 */
99 	GOT_IMSG_OBJECT_REQUEST,
100 	GOT_IMSG_OBJECT,
101 	GOT_IMSG_COMMIT_REQUEST,
102 	GOT_IMSG_COMMIT,
103 	GOT_IMSG_COMMIT_LOGMSG,
104 	GOT_IMSG_TREE_REQUEST,
105 	GOT_IMSG_TREE,
106 	GOT_IMSG_TREE_ENTRY,
107 	GOT_IMSG_BLOB_REQUEST,
108 	GOT_IMSG_BLOB_OUTFD,
109 	GOT_IMSG_BLOB,
110 	GOT_IMSG_TAG_REQUEST,
111 	GOT_IMSG_TAG,
112 	GOT_IMSG_TAG_TAGMSG,
113 
114 	/* Messages related to networking. */
115 	GOT_IMSG_FETCH_REQUEST,
116 	GOT_IMSG_FETCH_HAVE_REF,
117 	GOT_IMSG_FETCH_WANTED_BRANCH,
118 	GOT_IMSG_FETCH_WANTED_REF,
119 	GOT_IMSG_FETCH_OUTFD,
120 	GOT_IMSG_FETCH_SYMREFS,
121 	GOT_IMSG_FETCH_REF,
122 	GOT_IMSG_FETCH_SERVER_PROGRESS,
123 	GOT_IMSG_FETCH_DOWNLOAD_PROGRESS,
124 	GOT_IMSG_FETCH_DONE,
125 	GOT_IMSG_IDXPACK_REQUEST,
126 	GOT_IMSG_IDXPACK_OUTFD,
127 	GOT_IMSG_IDXPACK_PROGRESS,
128 	GOT_IMSG_IDXPACK_DONE,
129 	GOT_IMSG_SEND_REQUEST,
130 	GOT_IMSG_SEND_REF,
131 	GOT_IMSG_SEND_REMOTE_REF,
132 	GOT_IMSG_SEND_REF_STATUS,
133 	GOT_IMSG_SEND_PACK_REQUEST,
134 	GOT_IMSG_SEND_PACKFD,
135 	GOT_IMSG_SEND_UPLOAD_PROGRESS,
136 	GOT_IMSG_SEND_DONE,
137 
138 	/* Messages related to pack files. */
139 	GOT_IMSG_PACKIDX,
140 	GOT_IMSG_PACK,
141 	GOT_IMSG_PACKED_OBJECT_REQUEST,
142 	GOT_IMSG_COMMIT_TRAVERSAL_REQUEST,
143 	GOT_IMSG_TRAVERSED_COMMITS,
144 	GOT_IMSG_COMMIT_TRAVERSAL_DONE,
145 
146 	/* Message sending file descriptor to a temporary file. */
147 	GOT_IMSG_TMPFD,
148 
149 	/* Messages related to gitconfig files. */
150 	GOT_IMSG_GITCONFIG_PARSE_REQUEST,
151 	GOT_IMSG_GITCONFIG_REPOSITORY_FORMAT_VERSION_REQUEST,
152 	GOT_IMSG_GITCONFIG_REPOSITORY_EXTENSIONS_REQUEST,
153 	GOT_IMSG_GITCONFIG_AUTHOR_NAME_REQUEST,
154 	GOT_IMSG_GITCONFIG_AUTHOR_EMAIL_REQUEST,
155 	GOT_IMSG_GITCONFIG_REMOTES_REQUEST,
156 	GOT_IMSG_GITCONFIG_INT_VAL,
157 	GOT_IMSG_GITCONFIG_STR_VAL,
158 	GOT_IMSG_GITCONFIG_REMOTES,
159 	GOT_IMSG_GITCONFIG_REMOTE,
160 	GOT_IMSG_GITCONFIG_OWNER_REQUEST,
161 	GOT_IMSG_GITCONFIG_OWNER,
162 
163 	/* Messages related to gotconfig files. */
164 	GOT_IMSG_GOTCONFIG_PARSE_REQUEST,
165 	GOT_IMSG_GOTCONFIG_AUTHOR_REQUEST,
166 	GOT_IMSG_GOTCONFIG_REMOTES_REQUEST,
167 	GOT_IMSG_GOTCONFIG_INT_VAL,
168 	GOT_IMSG_GOTCONFIG_STR_VAL,
169 	GOT_IMSG_GOTCONFIG_REMOTES,
170 	GOT_IMSG_GOTCONFIG_REMOTE,
171 
172 	/* Raw object access. Uncompress object data but do not parse it. */
173 	GOT_IMSG_RAW_OBJECT_REQUEST,
174 	GOT_IMSG_RAW_OBJECT_OUTFD,
175 	GOT_IMSG_PACKED_RAW_OBJECT_REQUEST,
176 	GOT_IMSG_RAW_OBJECT,
177 };
178 
179 /* Structure for GOT_IMSG_ERROR. */
180 struct got_imsg_error {
181 	int code; /* an error code from got_error.h */
182 	int errno_code; /* in case code equals GOT_ERR_ERRNO */
183 } __attribute__((__packed__));
184 
185 /*
186  * Structure for GOT_IMSG_TREE_REQUEST and GOT_IMSG_OBJECT data.
187  */
188 struct got_imsg_object {
189 	uint8_t id[SHA1_DIGEST_LENGTH];
190 
191 	/* These fields are the same as in struct got_object. */
192 	int type;
193 	int flags;
194 	size_t hdrlen;
195 	size_t size;
196 	off_t pack_offset;
197 	int pack_idx;
198 }  __attribute__((__packed__));
199 
200 /* Structure for GOT_IMSG_COMMIT data. */
201 struct got_imsg_commit_object {
202 	uint8_t tree_id[SHA1_DIGEST_LENGTH];
203 	size_t author_len;
204 	time_t author_time;
205 	time_t author_gmtoff;
206 	size_t committer_len;
207 	time_t committer_time;
208 	time_t committer_gmtoff;
209 	size_t logmsg_len;
210 	int nparents;
211 
212 	/*
213 	 * Followed by author_len + committer_len data bytes
214 	 */
215 
216 	/* Followed by 'nparents' SHA1_DIGEST_LENGTH length strings */
217 
218 	/*
219 	 * Followed by 'logmsg_len' bytes of commit log message data in
220 	 * one or more GOT_IMSG_COMMIT_LOGMSG messages.
221 	 */
222 } __attribute__((__packed__));
223 
224 
225 /* Structure for GOT_IMSG_TREE_ENTRY. */
226 struct got_imsg_tree_entry {
227 	char id[SHA1_DIGEST_LENGTH];
228 	mode_t mode;
229 	/* Followed by entry's name in remaining data of imsg buffer. */
230 } __attribute__((__packed__));
231 
232 /* Structure for GOT_IMSG_TREE_OBJECT_REPLY data. */
233 struct got_imsg_tree_object {
234 	int nentries; /* This many TREE_ENTRY messages follow. */
235 };
236 
237 /* Structure for GOT_IMSG_BLOB. */
238 struct got_imsg_blob {
239 	size_t size;
240 	size_t hdrlen;
241 
242 	/*
243 	 * If size <= GOT_PRIVSEP_INLINE_BLOB_DATA_MAX, blob data follows
244 	 * in the imsg buffer. Otherwise, blob data has been written to a
245 	 * file descriptor passed via the GOT_IMSG_BLOB_OUTFD imsg.
246 	 */
247 #define GOT_PRIVSEP_INLINE_BLOB_DATA_MAX \
248 	(MAX_IMSGSIZE - IMSG_HEADER_SIZE - sizeof(struct got_imsg_blob))
249 };
250 
251 /* Structure for GOT_IMSG_RAW_OBJECT. */
252 struct got_imsg_raw_obj {
253 	off_t size;
254 	size_t hdrlen;
255 
256 	/*
257 	 * If size <= GOT_PRIVSEP_INLINE_OBJECT_DATA_MAX, object data follows
258 	 * in the imsg buffer. Otherwise, object data has been written to a
259 	 * file descriptor passed via the GOT_IMSG_RAW_OBJECT_OUTFD imsg.
260 	 */
261 #define GOT_PRIVSEP_INLINE_OBJECT_DATA_MAX \
262 	(MAX_IMSGSIZE - IMSG_HEADER_SIZE - sizeof(struct got_imsg_raw_obj))
263 };
264 
265 /* Structure for GOT_IMSG_TAG data. */
266 struct got_imsg_tag_object {
267 	uint8_t id[SHA1_DIGEST_LENGTH];
268 	int obj_type;
269 	size_t tag_len;
270 	size_t tagger_len;
271 	time_t tagger_time;
272 	time_t tagger_gmtoff;
273 	size_t tagmsg_len;
274 
275 	/*
276 	 * Followed by tag_len + tagger_len data bytes
277 	 */
278 
279 	/*
280 	 * Followed by 'tagmsg_len' bytes of tag message data in
281 	 * one or more GOT_IMSG_TAG_TAGMSG messages.
282 	 */
283 } __attribute__((__packed__));
284 
285 /* Structure for GOT_IMSG_FETCH_HAVE_REF data. */
286 struct got_imsg_fetch_have_ref {
287 	uint8_t id[SHA1_DIGEST_LENGTH];
288 	size_t name_len;
289 	/* Followed by name_len data bytes. */
290 } __attribute__((__packed__));
291 
292 /* Structure for GOT_IMSG_FETCH_WANTED_BRANCH data. */
293 struct got_imsg_fetch_wanted_branch {
294 	size_t name_len;
295 	/* Followed by name_len data bytes. */
296 } __attribute__((__packed__));
297 
298 /* Structure for GOT_IMSG_FETCH_WANTED_REF data. */
299 struct got_imsg_fetch_wanted_ref {
300 	size_t name_len;
301 	/* Followed by name_len data bytes. */
302 } __attribute__((__packed__));
303 
304 /* Structure for GOT_IMSG_FETCH_REQUEST data. */
305 struct got_imsg_fetch_request {
306 	int fetch_all_branches;
307 	int list_refs_only;
308 	int verbosity;
309 	size_t n_have_refs;
310 	size_t n_wanted_branches;
311 	size_t n_wanted_refs;
312 	/* Followed by n_have_refs GOT_IMSG_FETCH_HAVE_REF messages. */
313 	/* Followed by n_wanted_branches times GOT_IMSG_FETCH_WANTED_BRANCH. */
314 	/* Followed by n_wanted_refs times GOT_IMSG_FETCH_WANTED_REF. */
315 } __attribute__((__packed__));
316 
317 /* Structures for GOT_IMSG_FETCH_SYMREFS data. */
318 struct got_imsg_fetch_symref {
319 	size_t name_len;
320 	size_t target_len;
321 
322 	/*
323 	 * Followed by name_len + target_len data bytes.
324 	 */
325 } __attribute__((__packed__));
326 
327 struct got_imsg_fetch_symrefs {
328 	size_t nsymrefs;
329 
330 	/* Followed by nsymrefs times of got_imsg_fetch_symref data. */
331 } __attribute__((__packed__));
332 
333 /* Structure for GOT_IMSG_FETCH_REF data. */
334 struct got_imsg_fetch_ref {
335 	/* Describes a reference which will be fetched. */
336 	uint8_t refid[SHA1_DIGEST_LENGTH];
337 	/* Followed by reference name in remaining data of imsg buffer. */
338 };
339 
340 /* Structure for GOT_IMSG_FETCH_DOWNLOAD_PROGRESS data. */
341 struct got_imsg_fetch_download_progress {
342 	/* Number of packfile data bytes downloaded so far. */
343 	off_t packfile_bytes;
344 };
345 
346 /* Structure for GOT_IMSG_SEND_REQUEST data. */
347 struct got_imsg_send_request {
348 	int verbosity;
349 	size_t nrefs;
350 	/* Followed by nrefs GOT_IMSG_SEND_REF messages. */
351 } __attribute__((__packed__));
352 
353 /* Structure for GOT_IMSG_SEND_UPLOAD_PROGRESS data. */
354 struct got_imsg_send_upload_progress {
355 	/* Number of packfile data bytes uploaded so far. */
356 	off_t packfile_bytes;
357 };
358 
359 /* Structure for GOT_IMSG_SEND_REF data. */
360 struct got_imsg_send_ref {
361 	uint8_t id[SHA1_DIGEST_LENGTH];
362 	int delete;
363 	size_t name_len;
364 	/* Followed by name_len data bytes. */
365 } __attribute__((__packed__));
366 
367 /* Structure for GOT_IMSG_SEND_REMOTE_REF data. */
368 struct got_imsg_send_remote_ref {
369 	uint8_t id[SHA1_DIGEST_LENGTH];
370 	size_t name_len;
371 	/* Followed by name_len data bytes. */
372 } __attribute__((__packed__));
373 
374 /* Structure for GOT_IMSG_SEND_REF_STATUS data. */
375 struct got_imsg_send_ref_status {
376 	int success;
377 	size_t name_len;
378 	/* Followed by name_len data bytes. */
379 } __attribute__((__packed__));
380 
381 /* Structure for GOT_IMSG_IDXPACK_REQUEST data. */
382 struct got_imsg_index_pack_request {
383 	uint8_t pack_hash[SHA1_DIGEST_LENGTH];
384 } __attribute__((__packed__));
385 
386 /* Structure for GOT_IMSG_IDXPACK_PROGRESS data. */
387 struct got_imsg_index_pack_progress {
388 	/* Total number of objects in pack file. */
389 	int nobj_total;
390 
391 	/* Number of objects indexed so far. */
392 	int nobj_indexed;
393 
394 	/* Number of non-deltified objects in pack file. */
395 	int nobj_loose;
396 
397 	/* Number of deltified objects resolved so far. */
398 	int nobj_resolved;
399 };
400 
401 /* Structure for GOT_IMSG_PACKIDX. */
402 struct got_imsg_packidx {
403 	size_t len;
404 	off_t packfile_size;
405 	/* Additionally, a file desciptor is passed via imsg. */
406 };
407 
408 /* Structure for GOT_IMSG_PACK. */
409 struct got_imsg_pack {
410 	char path_packfile[PATH_MAX];
411 	size_t filesize;
412 	/* Additionally, a file desciptor is passed via imsg. */
413 } __attribute__((__packed__));
414 
415 /*
416  * Structure for GOT_IMSG_OBJECT_REQUEST, GOT_IMSG_BLOB_REQUEST,
417  * GOT_IMSG_TREE_REQUEST, GOT_IMSG_COMMIT_REQUEST, and
418  * GOT_IMSG_TAG_REQUEST data.
419  */
420 struct got_object_id;
421 
422 /*
423  * Structure for GOT_IMSG_PACKED_OBJECT_REQUEST and
424  * GOT_IMSG_PACKED_RAW_OBJECT_REQUEST data.
425  */
426 struct got_imsg_packed_object {
427 	uint8_t id[SHA1_DIGEST_LENGTH];
428 	int idx;
429 } __attribute__((__packed__));
430 
431 /* Structure for GOT_IMSG_COMMIT_TRAVERSAL_REQUEST  */
432 struct got_imsg_commit_traversal_request {
433 	uint8_t id[SHA1_DIGEST_LENGTH];
434 	int idx;
435 	size_t path_len;
436 	/* Followed by path_len bytes of path data */
437 } __attribute__((__packed__));
438 
439 /* Structure for GOT_IMSG_TRAVERSED_COMMITS  */
440 struct got_imsg_traversed_commits {
441 	size_t ncommits;
442 	/* Followed by ncommit IDs of SHA1_DIGEST_LENGTH each */
443 } __attribute__((__packed__));
444 
445 /*
446  * Structure for GOT_IMSG_GOTCONFIG_REMOTE and
447  * GOT_IMSG_GOTCONFIG_REMOTE data.
448  */
449 struct got_imsg_remote {
450 	size_t name_len;
451 	size_t fetch_url_len;
452 	size_t send_url_len;
453 	int mirror_references;
454 	int fetch_all_branches;
455 	int nfetch_branches;
456 	int nsend_branches;
457 	int nfetch_refs;
458 
459 	/* Followed by name_len data bytes. */
460 	/* Followed by fetch_url_len + send_url_len data bytes. */
461 	/* Followed by nfetch_branches GOT_IMSG_GITCONFIG_STR_VAL messages. */
462 	/* Followed by nsend_branches GOT_IMSG_GITCONFIG_STR_VAL messages. */
463 	/* Followed by nfetch_refs GOT_IMSG_GITCONFIG_STR_VAL messages. */
464 } __attribute__((__packed__));
465 
466 /*
467  * Structure for GOT_IMSG_GITCONFIG_REMOTES data.
468  */
469 struct got_imsg_remotes {
470 	int nremotes; /* This many GOT_IMSG_GITCONFIG_REMOTE messages follow. */
471 };
472 
473 struct got_remote_repo;
474 struct got_pack;
475 struct got_packidx;
476 struct got_pathlist_head;
477 
478 const struct got_error *got_send_ack(pid_t);
479 const struct got_error *got_privsep_wait_for_child(pid_t);
480 const struct got_error *got_privsep_flush_imsg(struct imsgbuf *);
481 const struct got_error *got_privsep_send_stop(int);
482 const struct got_error *got_privsep_recv_imsg(struct imsg *, struct imsgbuf *,
483     size_t);
484 void got_privsep_send_error(struct imsgbuf *, const struct got_error *);
485 const struct got_error *got_privsep_send_ack(struct imsgbuf *);
486 const struct got_error *got_privsep_wait_ack(struct imsgbuf *);
487 const struct got_error *got_privsep_send_obj_req(struct imsgbuf *, int,
488     struct got_object_id *);
489 const struct got_error *got_privsep_send_raw_obj_req(struct imsgbuf *, int,
490     struct got_object_id *);
491 const struct got_error *got_privsep_send_raw_obj_outfd(struct imsgbuf *, int);
492 const struct got_error *got_privsep_send_commit_req(struct imsgbuf *, int,
493     struct got_object_id *, int);
494 const struct got_error *got_privsep_send_tree_req(struct imsgbuf *, int,
495     struct got_object_id *, int);
496 const struct got_error *got_privsep_send_tag_req(struct imsgbuf *, int,
497     struct got_object_id *, int);
498 const struct got_error *got_privsep_send_blob_req(struct imsgbuf *, int,
499     struct got_object_id *, int);
500 const struct got_error *got_privsep_send_blob_outfd(struct imsgbuf *, int);
501 const struct got_error *got_privsep_send_tmpfd(struct imsgbuf *, int);
502 const struct got_error *got_privsep_send_obj(struct imsgbuf *,
503     struct got_object *);
504 const struct got_error *got_privsep_send_index_pack_req(struct imsgbuf *,
505     uint8_t *, int);
506 const struct got_error *got_privsep_send_index_pack_outfd(struct imsgbuf *,
507     int);
508 const struct got_error *got_privsep_recv_index_progress(int *, int *, int *,
509     int *, int *, struct imsgbuf *ibuf);
510 const struct got_error *got_privsep_send_fetch_req(struct imsgbuf *, int,
511     struct got_pathlist_head *, int, struct got_pathlist_head *,
512     struct got_pathlist_head *, int, int);
513 const struct got_error *got_privsep_send_fetch_outfd(struct imsgbuf *, int);
514 const struct got_error *got_privsep_recv_fetch_progress(int *,
515     struct got_object_id **, char **, struct got_pathlist_head *, char **,
516     off_t *, uint8_t *, struct imsgbuf *);
517 const struct got_error *got_privsep_send_send_req(struct imsgbuf *, int,
518     struct got_pathlist_head *, struct got_pathlist_head *, int);
519 const struct got_error *got_privsep_recv_send_remote_refs(
520     struct got_pathlist_head *, struct imsgbuf *);
521 const struct got_error *got_privsep_send_packfd(struct imsgbuf *, int);
522 const struct got_error *got_privsep_recv_send_progress(int *, off_t *,
523     int *, char **, struct imsgbuf *);
524 const struct got_error *got_privsep_get_imsg_obj(struct got_object **,
525     struct imsg *, struct imsgbuf *);
526 const struct got_error *got_privsep_recv_obj(struct got_object **,
527     struct imsgbuf *);
528 const struct got_error *got_privsep_send_raw_obj(struct imsgbuf *, off_t,
529     size_t, uint8_t *);
530 const struct got_error *got_privsep_recv_raw_obj(uint8_t **, off_t *, size_t *,
531     struct imsgbuf *);
532 const struct got_error *got_privsep_send_commit(struct imsgbuf *,
533     struct got_commit_object *);
534 const struct got_error *got_privsep_recv_commit(struct got_commit_object **,
535     struct imsgbuf *);
536 const struct got_error *got_privsep_recv_tree(struct got_tree_object **,
537     struct imsgbuf *);
538 const struct got_error *got_privsep_send_tree(struct imsgbuf *,
539     struct got_pathlist_head *, int);
540 const struct got_error *got_privsep_send_blob(struct imsgbuf *, size_t, size_t,
541     const uint8_t *);
542 const struct got_error *got_privsep_recv_blob(uint8_t **, size_t *, size_t *,
543     struct imsgbuf *);
544 const struct got_error *got_privsep_send_tag(struct imsgbuf *,
545     struct got_tag_object *);
546 const struct got_error *got_privsep_recv_tag(struct got_tag_object **,
547     struct imsgbuf *);
548 const struct got_error *got_privsep_init_pack_child(struct imsgbuf *,
549     struct got_pack *, struct got_packidx *);
550 const struct got_error *got_privsep_send_packed_obj_req(struct imsgbuf *, int,
551     struct got_object_id *);
552 const struct got_error *got_privsep_send_packed_raw_obj_req(struct imsgbuf *,
553     int, struct got_object_id *);
554 const struct got_error *got_privsep_send_pack_child_ready(struct imsgbuf *);
555 
556 const struct got_error *got_privsep_send_gitconfig_parse_req(struct imsgbuf *,
557     int);
558 const struct got_error *
559     got_privsep_send_gitconfig_repository_format_version_req(struct imsgbuf *);
560 const struct got_error *got_privsep_send_gitconfig_repository_extensions_req(
561     struct imsgbuf *);
562 const struct got_error *got_privsep_send_gitconfig_author_name_req(
563     struct imsgbuf *);
564 const struct got_error *got_privsep_send_gitconfig_author_email_req(
565     struct imsgbuf *);
566 const struct got_error *got_privsep_send_gitconfig_remotes_req(
567     struct imsgbuf *);
568 const struct got_error *got_privsep_send_gitconfig_owner_req(struct imsgbuf *);
569 const struct got_error *got_privsep_recv_gitconfig_str(char **,
570     struct imsgbuf *);
571 const struct got_error *got_privsep_recv_gitconfig_int(int *, struct imsgbuf *);
572 const struct got_error *got_privsep_recv_gitconfig_remotes(
573     struct got_remote_repo **, int *, struct imsgbuf *);
574 
575 const struct got_error *got_privsep_send_gotconfig_parse_req(struct imsgbuf *,
576     int);
577 const struct got_error *got_privsep_send_gotconfig_author_req(struct imsgbuf *);
578 const struct got_error *got_privsep_send_gotconfig_remotes_req(
579     struct imsgbuf *);
580 const struct got_error *got_privsep_recv_gotconfig_str(char **,
581     struct imsgbuf *);
582 const struct got_error *got_privsep_recv_gotconfig_remotes(
583     struct got_remote_repo **, int *, struct imsgbuf *);
584 
585 const struct got_error *got_privsep_send_commit_traversal_request(
586     struct imsgbuf *, struct got_object_id *, int, const char *);
587 const struct got_error *got_privsep_recv_traversed_commits(
588     struct got_commit_object **, struct got_object_id **,
589     struct got_object_id_queue *, struct imsgbuf *);
590 
591 void got_privsep_exec_child(int[2], const char *, const char *);