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/libexec
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 	/* Read raw delta data from pack files. */
179 	GOT_IMSG_RAW_DELTA_OUTFD,
180 	GOT_IMSG_RAW_DELTA_REQUEST,
181 	GOT_IMSG_RAW_DELTA,
182 };
183 
184 /* Structure for GOT_IMSG_ERROR. */
185 struct got_imsg_error {
186 	int code; /* an error code from got_error.h */
187 	int errno_code; /* in case code equals GOT_ERR_ERRNO */
188 } __attribute__((__packed__));
189 
190 /*
191  * Structure for GOT_IMSG_TREE_REQUEST and GOT_IMSG_OBJECT data.
192  */
193 struct got_imsg_object {
194 	uint8_t id[SHA1_DIGEST_LENGTH];
195 
196 	/* These fields are the same as in struct got_object. */
197 	int type;
198 	int flags;
199 	size_t hdrlen;
200 	size_t size;
201 	off_t pack_offset;
202 	int pack_idx;
203 }  __attribute__((__packed__));
204 
205 /* Structure for GOT_IMSG_COMMIT data. */
206 struct got_imsg_commit_object {
207 	uint8_t tree_id[SHA1_DIGEST_LENGTH];
208 	size_t author_len;
209 	time_t author_time;
210 	time_t author_gmtoff;
211 	size_t committer_len;
212 	time_t committer_time;
213 	time_t committer_gmtoff;
214 	size_t logmsg_len;
215 	int nparents;
216 
217 	/*
218 	 * Followed by author_len + committer_len data bytes
219 	 */
220 
221 	/* Followed by 'nparents' SHA1_DIGEST_LENGTH length strings */
222 
223 	/*
224 	 * Followed by 'logmsg_len' bytes of commit log message data in
225 	 * one or more GOT_IMSG_COMMIT_LOGMSG messages.
226 	 */
227 } __attribute__((__packed__));
228 
229 
230 /* Structure for GOT_IMSG_TREE_ENTRY. */
231 struct got_imsg_tree_entry {
232 	char id[SHA1_DIGEST_LENGTH];
233 	mode_t mode;
234 	/* Followed by entry's name in remaining data of imsg buffer. */
235 } __attribute__((__packed__));
236 
237 /* Structure for GOT_IMSG_TREE_OBJECT_REPLY data. */
238 struct got_imsg_tree_object {
239 	int nentries; /* This many TREE_ENTRY messages follow. */
240 };
241 
242 /* Structure for GOT_IMSG_BLOB. */
243 struct got_imsg_blob {
244 	size_t size;
245 	size_t hdrlen;
246 
247 	/*
248 	 * If size <= GOT_PRIVSEP_INLINE_BLOB_DATA_MAX, blob data follows
249 	 * in the imsg buffer. Otherwise, blob data has been written to a
250 	 * file descriptor passed via the GOT_IMSG_BLOB_OUTFD imsg.
251 	 */
252 #define GOT_PRIVSEP_INLINE_BLOB_DATA_MAX \
253 	(MAX_IMSGSIZE - IMSG_HEADER_SIZE - sizeof(struct got_imsg_blob))
254 };
255 
256 /* Structure for GOT_IMSG_RAW_OBJECT. */
257 struct got_imsg_raw_obj {
258 	off_t size;
259 	size_t hdrlen;
260 
261 	/*
262 	 * If size <= GOT_PRIVSEP_INLINE_OBJECT_DATA_MAX, object data follows
263 	 * in the imsg buffer. Otherwise, object data has been written to a
264 	 * file descriptor passed via the GOT_IMSG_RAW_OBJECT_OUTFD imsg.
265 	 */
266 #define GOT_PRIVSEP_INLINE_OBJECT_DATA_MAX \
267 	(MAX_IMSGSIZE - IMSG_HEADER_SIZE - sizeof(struct got_imsg_raw_obj))
268 };
269 
270 /* Structure for GOT_IMSG_RAW_DELTA. */
271 struct got_imsg_raw_delta {
272 	uint8_t base_id[SHA1_DIGEST_LENGTH];
273 	uint64_t base_size;
274 	uint64_t result_size;
275 	off_t delta_size;
276 	off_t delta_offset;
277 	off_t delta_out_offset;
278 
279 	/*
280 	 * Delta data has been written at delta_out_offset to the file
281 	 * descriptor passed via the GOT_IMSG_RAW_DELTA_OUTFD imsg.
282 	 */
283 };
284 
285 /* Structure for GOT_IMSG_TAG data. */
286 struct got_imsg_tag_object {
287 	uint8_t id[SHA1_DIGEST_LENGTH];
288 	int obj_type;
289 	size_t tag_len;
290 	size_t tagger_len;
291 	time_t tagger_time;
292 	time_t tagger_gmtoff;
293 	size_t tagmsg_len;
294 
295 	/*
296 	 * Followed by tag_len + tagger_len data bytes
297 	 */
298 
299 	/*
300 	 * Followed by 'tagmsg_len' bytes of tag message data in
301 	 * one or more GOT_IMSG_TAG_TAGMSG messages.
302 	 */
303 } __attribute__((__packed__));
304 
305 /* Structure for GOT_IMSG_FETCH_HAVE_REF data. */
306 struct got_imsg_fetch_have_ref {
307 	uint8_t id[SHA1_DIGEST_LENGTH];
308 	size_t name_len;
309 	/* Followed by name_len data bytes. */
310 } __attribute__((__packed__));
311 
312 /* Structure for GOT_IMSG_FETCH_WANTED_BRANCH data. */
313 struct got_imsg_fetch_wanted_branch {
314 	size_t name_len;
315 	/* Followed by name_len data bytes. */
316 } __attribute__((__packed__));
317 
318 /* Structure for GOT_IMSG_FETCH_WANTED_REF data. */
319 struct got_imsg_fetch_wanted_ref {
320 	size_t name_len;
321 	/* Followed by name_len data bytes. */
322 } __attribute__((__packed__));
323 
324 /* Structure for GOT_IMSG_FETCH_REQUEST data. */
325 struct got_imsg_fetch_request {
326 	int fetch_all_branches;
327 	int list_refs_only;
328 	int verbosity;
329 	size_t n_have_refs;
330 	size_t n_wanted_branches;
331 	size_t n_wanted_refs;
332 	/* Followed by n_have_refs GOT_IMSG_FETCH_HAVE_REF messages. */
333 	/* Followed by n_wanted_branches times GOT_IMSG_FETCH_WANTED_BRANCH. */
334 	/* Followed by n_wanted_refs times GOT_IMSG_FETCH_WANTED_REF. */
335 } __attribute__((__packed__));
336 
337 /* Structures for GOT_IMSG_FETCH_SYMREFS data. */
338 struct got_imsg_fetch_symref {
339 	size_t name_len;
340 	size_t target_len;
341 
342 	/*
343 	 * Followed by name_len + target_len data bytes.
344 	 */
345 } __attribute__((__packed__));
346 
347 struct got_imsg_fetch_symrefs {
348 	size_t nsymrefs;
349 
350 	/* Followed by nsymrefs times of got_imsg_fetch_symref data. */
351 } __attribute__((__packed__));
352 
353 /* Structure for GOT_IMSG_FETCH_REF data. */
354 struct got_imsg_fetch_ref {
355 	/* Describes a reference which will be fetched. */
356 	uint8_t refid[SHA1_DIGEST_LENGTH];
357 	/* Followed by reference name in remaining data of imsg buffer. */
358 };
359 
360 /* Structure for GOT_IMSG_FETCH_DOWNLOAD_PROGRESS data. */
361 struct got_imsg_fetch_download_progress {
362 	/* Number of packfile data bytes downloaded so far. */
363 	off_t packfile_bytes;
364 };
365 
366 /* Structure for GOT_IMSG_SEND_REQUEST data. */
367 struct got_imsg_send_request {
368 	int verbosity;
369 	size_t nrefs;
370 	/* Followed by nrefs GOT_IMSG_SEND_REF messages. */
371 } __attribute__((__packed__));
372 
373 /* Structure for GOT_IMSG_SEND_UPLOAD_PROGRESS data. */
374 struct got_imsg_send_upload_progress {
375 	/* Number of packfile data bytes uploaded so far. */
376 	off_t packfile_bytes;
377 };
378 
379 /* Structure for GOT_IMSG_SEND_REF data. */
380 struct got_imsg_send_ref {
381 	uint8_t id[SHA1_DIGEST_LENGTH];
382 	int delete;
383 	size_t name_len;
384 	/* Followed by name_len data bytes. */
385 } __attribute__((__packed__));
386 
387 /* Structure for GOT_IMSG_SEND_REMOTE_REF data. */
388 struct got_imsg_send_remote_ref {
389 	uint8_t id[SHA1_DIGEST_LENGTH];
390 	size_t name_len;
391 	/* Followed by name_len data bytes. */
392 } __attribute__((__packed__));
393 
394 /* Structure for GOT_IMSG_SEND_REF_STATUS data. */
395 struct got_imsg_send_ref_status {
396 	int success;
397 	size_t name_len;
398 	/* Followed by name_len data bytes. */
399 } __attribute__((__packed__));
400 
401 /* Structure for GOT_IMSG_IDXPACK_REQUEST data. */
402 struct got_imsg_index_pack_request {
403 	uint8_t pack_hash[SHA1_DIGEST_LENGTH];
404 } __attribute__((__packed__));
405 
406 /* Structure for GOT_IMSG_IDXPACK_PROGRESS data. */
407 struct got_imsg_index_pack_progress {
408 	/* Total number of objects in pack file. */
409 	int nobj_total;
410 
411 	/* Number of objects indexed so far. */
412 	int nobj_indexed;
413 
414 	/* Number of non-deltified objects in pack file. */
415 	int nobj_loose;
416 
417 	/* Number of deltified objects resolved so far. */
418 	int nobj_resolved;
419 };
420 
421 /* Structure for GOT_IMSG_PACKIDX. */
422 struct got_imsg_packidx {
423 	size_t len;
424 	off_t packfile_size;
425 	/* Additionally, a file desciptor is passed via imsg. */
426 };
427 
428 /* Structure for GOT_IMSG_PACK. */
429 struct got_imsg_pack {
430 	char path_packfile[PATH_MAX];
431 	size_t filesize;
432 	/* Additionally, a file desciptor is passed via imsg. */
433 } __attribute__((__packed__));
434 
435 /*
436  * Structure for GOT_IMSG_OBJECT_REQUEST, GOT_IMSG_BLOB_REQUEST,
437  * GOT_IMSG_TREE_REQUEST, GOT_IMSG_COMMIT_REQUEST, and
438  * GOT_IMSG_TAG_REQUEST data.
439  */
440 struct got_object_id;
441 
442 /*
443  * Structure for GOT_IMSG_PACKED_OBJECT_REQUEST and
444  * GOT_IMSG_PACKED_RAW_OBJECT_REQUEST data.
445  */
446 struct got_imsg_packed_object {
447 	uint8_t id[SHA1_DIGEST_LENGTH];
448 	int idx;
449 } __attribute__((__packed__));
450 
451 /*
452  * Structure for GOT_IMSG_DELTA data.
453  */
454 struct got_imsg_delta {
455 	/* These fields are the same as in struct got_delta. */
456 	off_t offset;
457 	size_t tslen;
458 	int type;
459 	size_t size;
460 	off_t data_offset;
461 };
462 
463 /*
464  * Structure for GOT_IMSG_RAW_DELTA_REQUEST data.
465  */
466 struct got_imsg_raw_delta_request {
467 	uint8_t id[SHA1_DIGEST_LENGTH];
468 	int idx;
469 };
470 
471 /* Structure for GOT_IMSG_COMMIT_TRAVERSAL_REQUEST  */
472 struct got_imsg_commit_traversal_request {
473 	uint8_t id[SHA1_DIGEST_LENGTH];
474 	int idx;
475 	size_t path_len;
476 	/* Followed by path_len bytes of path data */
477 } __attribute__((__packed__));
478 
479 /* Structure for GOT_IMSG_TRAVERSED_COMMITS  */
480 struct got_imsg_traversed_commits {
481 	size_t ncommits;
482 	/* Followed by ncommit IDs of SHA1_DIGEST_LENGTH each */
483 } __attribute__((__packed__));
484 
485 /*
486  * Structure for GOT_IMSG_GOTCONFIG_REMOTE and
487  * GOT_IMSG_GOTCONFIG_REMOTE data.
488  */
489 struct got_imsg_remote {
490 	size_t name_len;
491 	size_t fetch_url_len;
492 	size_t send_url_len;
493 	int mirror_references;
494 	int fetch_all_branches;
495 	int nfetch_branches;
496 	int nsend_branches;
497 	int nfetch_refs;
498 
499 	/* Followed by name_len data bytes. */
500 	/* Followed by fetch_url_len + send_url_len data bytes. */
501 	/* Followed by nfetch_branches GOT_IMSG_GITCONFIG_STR_VAL messages. */
502 	/* Followed by nsend_branches GOT_IMSG_GITCONFIG_STR_VAL messages. */
503 	/* Followed by nfetch_refs GOT_IMSG_GITCONFIG_STR_VAL messages. */
504 } __attribute__((__packed__));
505 
506 /*
507  * Structure for GOT_IMSG_GITCONFIG_REMOTES data.
508  */
509 struct got_imsg_remotes {
510 	int nremotes; /* This many GOT_IMSG_GITCONFIG_REMOTE messages follow. */
511 };
512 
513 struct got_remote_repo;
514 struct got_pack;
515 struct got_packidx;
516 struct got_pathlist_head;
517 
518 const struct got_error *got_send_ack(pid_t);
519 const struct got_error *got_privsep_wait_for_child(pid_t);
520 const struct got_error *got_privsep_flush_imsg(struct imsgbuf *);
521 const struct got_error *got_privsep_send_stop(int);
522 const struct got_error *got_privsep_recv_imsg(struct imsg *, struct imsgbuf *,
523     size_t);
524 void got_privsep_send_error(struct imsgbuf *, const struct got_error *);
525 const struct got_error *got_privsep_send_ack(struct imsgbuf *);
526 const struct got_error *got_privsep_wait_ack(struct imsgbuf *);
527 const struct got_error *got_privsep_send_obj_req(struct imsgbuf *, int,
528     struct got_object_id *);
529 const struct got_error *got_privsep_send_raw_obj_req(struct imsgbuf *, int,
530     struct got_object_id *);
531 const struct got_error *got_privsep_send_raw_obj_outfd(struct imsgbuf *, int);
532 const struct got_error *got_privsep_send_commit_req(struct imsgbuf *, int,
533     struct got_object_id *, int);
534 const struct got_error *got_privsep_send_tree_req(struct imsgbuf *, int,
535     struct got_object_id *, int);
536 const struct got_error *got_privsep_send_tag_req(struct imsgbuf *, int,
537     struct got_object_id *, int);
538 const struct got_error *got_privsep_send_blob_req(struct imsgbuf *, int,
539     struct got_object_id *, int);
540 const struct got_error *got_privsep_send_blob_outfd(struct imsgbuf *, int);
541 const struct got_error *got_privsep_send_tmpfd(struct imsgbuf *, int);
542 const struct got_error *got_privsep_send_obj(struct imsgbuf *,
543     struct got_object *);
544 const struct got_error *got_privsep_send_index_pack_req(struct imsgbuf *,
545     uint8_t *, int);
546 const struct got_error *got_privsep_send_index_pack_outfd(struct imsgbuf *,
547     int);
548 const struct got_error *got_privsep_recv_index_progress(int *, int *, int *,
549     int *, int *, struct imsgbuf *ibuf);
550 const struct got_error *got_privsep_send_fetch_req(struct imsgbuf *, int,
551     struct got_pathlist_head *, int, struct got_pathlist_head *,
552     struct got_pathlist_head *, int, int);
553 const struct got_error *got_privsep_send_fetch_outfd(struct imsgbuf *, int);
554 const struct got_error *got_privsep_recv_fetch_progress(int *,
555     struct got_object_id **, char **, struct got_pathlist_head *, char **,
556     off_t *, uint8_t *, struct imsgbuf *);
557 const struct got_error *got_privsep_send_send_req(struct imsgbuf *, int,
558     struct got_pathlist_head *, struct got_pathlist_head *, int);
559 const struct got_error *got_privsep_recv_send_remote_refs(
560     struct got_pathlist_head *, struct imsgbuf *);
561 const struct got_error *got_privsep_send_packfd(struct imsgbuf *, int);
562 const struct got_error *got_privsep_recv_send_progress(int *, off_t *,
563     int *, char **, struct imsgbuf *);
564 const struct got_error *got_privsep_get_imsg_obj(struct got_object **,
565     struct imsg *, struct imsgbuf *);
566 const struct got_error *got_privsep_recv_obj(struct got_object **,
567     struct imsgbuf *);
568 const struct got_error *got_privsep_send_raw_obj(struct imsgbuf *, off_t,
569     size_t, uint8_t *);
570 const struct got_error *got_privsep_recv_raw_obj(uint8_t **, off_t *, size_t *,
571     struct imsgbuf *);
572 const struct got_error *got_privsep_send_commit(struct imsgbuf *,
573     struct got_commit_object *);
574 const struct got_error *got_privsep_recv_commit(struct got_commit_object **,
575     struct imsgbuf *);
576 const struct got_error *got_privsep_recv_tree(struct got_tree_object **,
577     struct imsgbuf *);
578 const struct got_error *got_privsep_send_tree(struct imsgbuf *,
579     struct got_pathlist_head *, int);
580 const struct got_error *got_privsep_send_blob(struct imsgbuf *, size_t, size_t,
581     const uint8_t *);
582 const struct got_error *got_privsep_recv_blob(uint8_t **, size_t *, size_t *,
583     struct imsgbuf *);
584 const struct got_error *got_privsep_send_tag(struct imsgbuf *,
585     struct got_tag_object *);
586 const struct got_error *got_privsep_recv_tag(struct got_tag_object **,
587     struct imsgbuf *);
588 const struct got_error *got_privsep_init_pack_child(struct imsgbuf *,
589     struct got_pack *, struct got_packidx *);
590 const struct got_error *got_privsep_send_packed_obj_req(struct imsgbuf *, int,
591     struct got_object_id *);
592 const struct got_error *got_privsep_send_packed_raw_obj_req(struct imsgbuf *,
593     int, struct got_object_id *);
594 const struct got_error *got_privsep_send_pack_child_ready(struct imsgbuf *);
595 
596 const struct got_error *got_privsep_send_gitconfig_parse_req(struct imsgbuf *,
597     int);
598 const struct got_error *
599     got_privsep_send_gitconfig_repository_format_version_req(struct imsgbuf *);
600 const struct got_error *got_privsep_send_gitconfig_repository_extensions_req(
601     struct imsgbuf *);
602 const struct got_error *got_privsep_send_gitconfig_author_name_req(
603     struct imsgbuf *);
604 const struct got_error *got_privsep_send_gitconfig_author_email_req(
605     struct imsgbuf *);
606 const struct got_error *got_privsep_send_gitconfig_remotes_req(
607     struct imsgbuf *);
608 const struct got_error *got_privsep_send_gitconfig_owner_req(struct imsgbuf *);
609 const struct got_error *got_privsep_recv_gitconfig_str(char **,
610     struct imsgbuf *);
611 const struct got_error *got_privsep_recv_gitconfig_int(int *, struct imsgbuf *);
612 const struct got_error *got_privsep_recv_gitconfig_remotes(
613     struct got_remote_repo **, int *, struct imsgbuf *);
614 
615 const struct got_error *got_privsep_send_gotconfig_parse_req(struct imsgbuf *,
616     int);
617 const struct got_error *got_privsep_send_gotconfig_author_req(struct imsgbuf *);
618 const struct got_error *got_privsep_send_gotconfig_remotes_req(
619     struct imsgbuf *);
620 const struct got_error *got_privsep_recv_gotconfig_str(char **,
621     struct imsgbuf *);
622 const struct got_error *got_privsep_recv_gotconfig_remotes(
623     struct got_remote_repo **, int *, struct imsgbuf *);
624 
625 const struct got_error *got_privsep_send_commit_traversal_request(
626     struct imsgbuf *, struct got_object_id *, int, const char *);
627 const struct got_error *got_privsep_recv_traversed_commits(
628     struct got_commit_object **, struct got_object_id **,
629     struct got_object_id_queue *, struct imsgbuf *);
630 
631 const struct got_error *got_privsep_send_raw_delta_req(struct imsgbuf *, int,
632     struct got_object_id *);
633 const struct got_error *got_privsep_send_raw_delta_outfd(struct imsgbuf *, int);
634 const struct got_error *got_privsep_send_raw_delta(struct imsgbuf *, uint64_t,
635     uint64_t,  off_t, off_t, off_t, struct got_object_id *);
636 const struct got_error *got_privsep_recv_raw_delta(uint64_t *, uint64_t *,
637     off_t *, off_t *, off_t *, struct got_object_id **, struct imsgbuf *);
638 
639 void got_privsep_exec_child(int[2], const char *, const char *);