1 /*
2  * Copyright (c) 2018, 2019 Ori Bernstein <ori@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/wait.h>
23 #include <sys/syslimits.h>
24 #include <sys/resource.h>
25 #include <sys/socket.h>
26 
27 #include <errno.h>
28 #include <err.h>
29 #include <fcntl.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33 #include <stdint.h>
34 #include <sha1.h>
35 #include <zlib.h>
36 #include <ctype.h>
37 #include <limits.h>
38 #include <imsg.h>
39 #include <time.h>
40 #include <uuid.h>
41 #include <netdb.h>
42 #include <netinet/in.h>
43 
44 #include "got_error.h"
45 #include "got_reference.h"
46 #include "got_repository.h"
47 #include "got_path.h"
48 #include "got_cancel.h"
49 #include "got_worktree.h"
50 #include "got_object.h"
51 #include "got_opentemp.h"
52 #include "got_fetch.h"
53 
54 #include "got_lib_delta.h"
55 #include "got_lib_inflate.h"
56 #include "got_lib_object.h"
57 #include "got_lib_object_parse.h"
58 #include "got_lib_object_create.h"
59 #include "got_lib_pack.h"
60 #include "got_lib_sha1.h"
61 #include "got_lib_privsep.h"
62 #include "got_lib_object_cache.h"
63 #include "got_lib_repository.h"
64 
65 #ifndef nitems
66 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
67 #endif
68 
69 #ifndef MIN
70 #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
71 #endif
72 
73 static int
74 hassuffix(char *base, char *suf)
75 {
76 	int nb, ns;
77 
78 	nb = strlen(base);
79 	ns = strlen(suf);
80 	if (ns <= nb && strcmp(base + (nb - ns), suf) == 0)
81 		return 1;
82 	return 0;
83 }
84 
85 static const struct got_error *
86 dial_ssh(pid_t *fetchpid, int *fetchfd, const char *host, const char *port,
87     const char *path, const char *direction, int verbosity)
88 {
89 	const struct got_error *error = NULL;
90 	int pid, pfd[2];
91 	char cmd[64];
92 	char *argv[11];
93 	int i = 0;
94 
95 	*fetchpid = -1;
96 	*fetchfd = -1;
97 
98 	if (port == NULL)
99 		port = "22";
100 
101 	argv[0] = GOT_FETCH_PATH_SSH;
102 	argv[1] = "-p";
103 	argv[2] = (char *)port;
104 	if (verbosity == -1) {
105 		argv[3 + i++] = "-q";
106 	} else {
107 		/* ssh(1) allows up to 3 "-v" options. */
108 		for (i = 0; i < MIN(3, verbosity); i++)
109 			argv[3 + i] = "-v";
110 	}
111 	argv[3 + i] = "--";
112 	argv[4 + i] = (char *)host;
113 	argv[5 + i] = (char *)cmd;
114 	argv[6 + i] = (char *)path;
115 	argv[7 + i] = NULL;
116 
117 	if (pipe(pfd) == -1)
118 		return got_error_from_errno("pipe");
119 
120 	pid = fork();
121 	if (pid == -1) {
122 		error = got_error_from_errno("fork");
123 		close(pfd[0]);
124 		close(pfd[1]);
125 		return error;
126 	} else if (pid == 0) {
127 		int n;
128 		close(pfd[1]);
129 		dup2(pfd[0], 0);
130 		dup2(pfd[0], 1);
131 		n = snprintf(cmd, sizeof(cmd), "git-%s-pack", direction);
132 		if (n < 0 || n >= sizeof(cmd))
133 			err(1, "snprintf");
134 		if (execv(GOT_FETCH_PATH_SSH, argv) == -1)
135 			err(1, "execl");
136 		abort(); /* not reached */
137 	} else {
138 		close(pfd[0]);
139 		*fetchpid = pid;
140 		*fetchfd = pfd[1];
141 		return NULL;
142 	}
143 }
144 
145 static const struct got_error *
146 dial_git(int *fetchfd, const char *host, const char *port, const char *path,
147     const char *direction)
148 {
149 	const struct got_error *err = NULL;
150 	struct addrinfo hints, *servinfo, *p;
151 	char *cmd = NULL, *pkt = NULL;
152 	int fd = -1, totlen, r, eaicode;
153 
154 	*fetchfd = -1;
155 
156 	if (port == NULL)
157 		port = GOT_DEFAULT_GIT_PORT_STR;
158 
159 	memset(&hints, 0, sizeof hints);
160 	hints.ai_family = AF_UNSPEC;
161 	hints.ai_socktype = SOCK_STREAM;
162 	eaicode = getaddrinfo(host, port, &hints, &servinfo);
163 	if (eaicode) {
164 		char msg[512];
165 		snprintf(msg, sizeof(msg), "%s: %s", host,
166 		    gai_strerror(eaicode));
167 		return got_error_msg(GOT_ERR_ADDRINFO, msg);
168 	}
169 
170 	for (p = servinfo; p != NULL; p = p->ai_next) {
171 		if ((fd = socket(p->ai_family, p->ai_socktype,
172 		    p->ai_protocol)) == -1)
173 			continue;
174 		if (connect(fd, p->ai_addr, p->ai_addrlen) == 0)
175 			break;
176 		err = got_error_from_errno("connect");
177 		close(fd);
178 	}
179 	if (p == NULL)
180 		goto done;
181 
182 	if (asprintf(&cmd, "git-%s-pack %s", direction, path) == -1) {
183 		err = got_error_from_errno("asprintf");
184 		goto done;
185 	}
186 	totlen = 4 + strlen(cmd) + 1 + strlen("host=") + strlen(host) + 1;
187 	if (asprintf(&pkt, "%04x%s", totlen, cmd) == -1) {
188 		err = got_error_from_errno("asprintf");
189 		goto done;
190 	}
191 	r = write(fd, pkt, strlen(pkt) + 1);
192 	if (r == -1) {
193 		err = got_error_from_errno("write");
194 		goto done;
195 	}
196 	if (asprintf(&pkt, "host=%s", host) == -1) {
197 		err = got_error_from_errno("asprintf");
198 		goto done;
199 	}
200 	r = write(fd, pkt, strlen(pkt) + 1);
201 	if (r == -1) {
202 		err = got_error_from_errno("write");
203 		goto done;
204 	}
205 done:
206 	free(cmd);
207 	free(pkt);
208 	if (err) {
209 		if (fd != -1)
210 			close(fd);
211 	} else
212 		*fetchfd = fd;
213 	return err;
214 }
215 
216 const struct got_error *
217 got_fetch_connect(pid_t *fetchpid, int *fetchfd, const char *proto,
218     const char *host, const char *port, const char *server_path, int verbosity)
219 {
220 	const struct got_error *err = NULL;
221 
222 	*fetchpid = -1;
223 	*fetchfd = -1;
224 
225 	if (strcmp(proto, "ssh") == 0 || strcmp(proto, "git+ssh") == 0)
226 		err = dial_ssh(fetchpid, fetchfd, host, port, server_path,
227 		    "upload", verbosity);
228 	else if (strcmp(proto, "git") == 0)
229 		err = dial_git(fetchfd, host, port, server_path, "upload");
230 	else if (strcmp(proto, "http") == 0 || strcmp(proto, "git+http") == 0)
231 		err = got_error_path(proto, GOT_ERR_NOT_IMPL);
232 	else
233 		err = got_error_path(proto, GOT_ERR_BAD_PROTO);
234 	return err;
235 }
236 
237 const struct got_error *
238 got_fetch_parse_uri(char **proto, char **host, char **port,
239     char **server_path, char **repo_name, const char *uri)
240 {
241 	const struct got_error *err = NULL;
242 	char *s, *p, *q;
243 	int n;
244 
245 	*proto = *host = *port = *server_path = *repo_name = NULL;
246 
247 	p = strstr(uri, "://");
248 	if (!p) {
249 		/* Try parsing Git's "scp" style URL syntax. */
250 		*proto = strdup("ssh");
251 		if (proto == NULL) {
252 			err = got_error_from_errno("strdup");
253 			goto done;
254 		}
255 		s = (char *)uri;
256 		q = strchr(s, ':');
257 		if (q == NULL) {
258 			err = got_error(GOT_ERR_PARSE_URI);
259 			goto done;
260 		}
261 		/* No slashes allowed before first colon. */
262 		p = strchr(s, '/');
263 		if (p && q > p) {
264 			err = got_error(GOT_ERR_PARSE_URI);
265 			goto done;
266 		}
267 		*host = strndup(s, q - s);
268 		if (*host == NULL) {
269 			err = got_error_from_errno("strndup");
270 			goto done;
271 		}
272 		p = q + 1;
273 	} else {
274 		*proto = strndup(uri, p - uri);
275 		if (proto == NULL) {
276 			err = got_error_from_errno("strndup");
277 			goto done;
278 		}
279 		s = p + 3;
280 
281 		p = strstr(s, "/");
282 		if (p == NULL || strlen(p) == 1) {
283 			err = got_error(GOT_ERR_PARSE_URI);
284 			goto done;
285 		}
286 
287 		q = memchr(s, ':', p - s);
288 		if (q) {
289 			*host = strndup(s, q - s);
290 			if (*host == NULL) {
291 				err = got_error_from_errno("strndup");
292 				goto done;
293 			}
294 			*port = strndup(q + 1, p - (q + 1));
295 			if (*port == NULL) {
296 				err = got_error_from_errno("strndup");
297 				goto done;
298 			}
299 		} else {
300 			*host = strndup(s, p - s);
301 			if (*host == NULL) {
302 				err = got_error_from_errno("strndup");
303 				goto done;
304 			}
305 		}
306 	}
307 
308 	*server_path = strdup(p);
309 	if (*server_path == NULL) {
310 		err = got_error_from_errno("strdup");
311 		goto done;
312 	}
313 
314 	p = strrchr(p, '/');
315 	if (!p || strlen(p) <= 1) {
316 		err = got_error(GOT_ERR_PARSE_URI);
317 		goto done;
318 	}
319 	p++;
320 	n = strlen(p);
321 	if (n == 0) {
322 		err = got_error(GOT_ERR_PARSE_URI);
323 		goto done;
324 	}
325 	if (hassuffix(p, ".git"))
326 		n -= 4;
327 	*repo_name = strndup(p, (p + n) - p);
328 	if (*repo_name == NULL) {
329 		err = got_error_from_errno("strndup");
330 		goto done;
331 	}
332 done:
333 	if (err) {
334 		free(*proto);
335 		*proto = NULL;
336 		free(*host);
337 		*host = NULL;
338 		free(*port);
339 		*port = NULL;
340 		free(*server_path);
341 		*server_path = NULL;
342 		free(*repo_name);
343 		*repo_name = NULL;
344 	}
345 	return err;
346 }
347 
348 static const struct got_error *
349 check_pack_hash(int fd, size_t sz, uint8_t *hcomp)
350 {
351 	SHA1_CTX ctx;
352 	uint8_t hexpect[SHA1_DIGEST_LENGTH];
353 	uint8_t buf[32 * 1024];
354 	ssize_t n, r, nr;
355 
356 	if (sz < sizeof(struct got_packfile_hdr) + SHA1_DIGEST_LENGTH)
357 		return got_error_msg(GOT_ERR_BAD_PACKFILE, "short packfile");
358 
359 	n = 0;
360 	SHA1Init(&ctx);
361 	while (n < sz - 20) {
362 		nr = sizeof(buf);
363 		if (sz - n - 20 < sizeof(buf))
364 			nr = sz - n - 20;
365 		r = read(fd, buf, nr);
366 		if (r == -1)
367 			return got_error_from_errno("read");
368 		if (r != nr)
369 			return got_error_msg(GOT_ERR_BAD_PACKFILE,
370 			    "short pack file");
371 		SHA1Update(&ctx, buf, nr);
372 		n += r;
373 	}
374 	SHA1Final(hcomp, &ctx);
375 
376 	r = read(fd, hexpect, sizeof(hexpect));
377 	if (r == -1)
378 		return got_error_from_errno("read");
379 	if (r != sizeof(hexpect))
380 		return got_error_msg(GOT_ERR_BAD_PACKFILE,
381 		    "short pack file");
382 
383 	if (memcmp(hcomp, hexpect, SHA1_DIGEST_LENGTH) != 0)
384 		return got_error_msg(GOT_ERR_BAD_PACKFILE,
385 		    "packfile checksum mismatch");
386 
387 	return NULL;
388 }
389 
390 const struct got_error*
391 got_fetch_pack(struct got_object_id **pack_hash, struct got_pathlist_head *refs,
392     struct got_pathlist_head *symrefs, const char *remote_name,
393     int mirror_references, int fetch_all_branches,
394     struct got_pathlist_head *wanted_branches, int list_refs_only,
395     int fetchfd, struct got_repository *repo,
396     got_fetch_progress_cb progress_cb, void *progress_arg)
397 {
398 	int imsg_fetchfds[2], imsg_idxfds[2];
399 	int packfd = -1, npackfd = -1, idxfd = -1, nidxfd = -1, nfetchfd = -1;
400 	int tmpfds[3], i;
401 	int fetchstatus, idxstatus, done = 0;
402 	const struct got_error *err;
403 	struct imsgbuf fetchibuf, idxibuf;
404 	pid_t fetchpid, idxpid;
405 	char *tmppackpath = NULL, *tmpidxpath = NULL;
406 	char *packpath = NULL, *idxpath = NULL, *id_str = NULL;
407 	const char *repo_path = NULL;
408 	struct got_pathlist_head have_refs;
409 	struct got_pathlist_entry *pe;
410 	struct got_reflist_head my_refs;
411 	struct got_reflist_entry *re;
412 	off_t packfile_size = 0;
413 	char *ref_prefix = NULL;
414 	size_t ref_prefixlen = 0;
415 	char *path;
416 	char *progress = NULL;
417 
418 	if (!list_refs_only)
419 		repo_path = got_repo_get_path_git_dir(repo);
420 
421 	*pack_hash = NULL;
422 	for (i = 0; i < nitems(tmpfds); i++)
423 		tmpfds[i] = -1;
424 
425 	TAILQ_INIT(&have_refs);
426 	SIMPLEQ_INIT(&my_refs);
427 
428 	if (!mirror_references) {
429 		if (asprintf(&ref_prefix, "refs/remotes/%s/",
430 		    remote_name) == -1)
431 			return got_error_from_errno("asprintf");
432 		ref_prefixlen = strlen(ref_prefix);
433 	}
434 
435 	if (!list_refs_only) {
436 		err = got_ref_list(&my_refs, repo, NULL,
437 		    got_ref_cmp_by_name, NULL);
438 		if (err)
439 			goto done;
440 	}
441 
442 	SIMPLEQ_FOREACH(re, &my_refs, entry) {
443 		struct got_object_id *id;
444 		const char *refname;
445 
446 		if (got_ref_is_symbolic(re->ref))
447 			continue;
448 
449 		refname = got_ref_get_name(re->ref);
450 
451 		if (mirror_references) {
452 			char *name;
453 			err = got_ref_resolve(&id, repo, re->ref);
454 			if (err)
455 				goto done;
456 			name = strdup(refname);
457 			if (name == NULL) {
458 				err = got_error_from_errno("strdup");
459 				goto done;
460 			}
461 			err = got_pathlist_append(&have_refs, name, id);
462 			if (err)
463 				goto done;
464 			continue;
465 		}
466 
467 		if (strncmp("refs/tags/", refname, 10) == 0) {
468 			char *tagname;
469 
470 			err = got_ref_resolve(&id, repo, re->ref);
471 			if (err)
472 				goto done;
473 			tagname = strdup(refname);
474 			if (tagname == NULL) {
475 				err = got_error_from_errno("strdup");
476 				goto done;
477 			}
478 			err = got_pathlist_append(&have_refs, tagname, id);
479 			if (err) {
480 				free(tagname);
481 				goto done;
482 			}
483 		}
484 
485 		if (strncmp(ref_prefix, refname, ref_prefixlen) == 0) {
486 			char *branchname;
487 
488 			err = got_ref_resolve(&id, repo, re->ref);
489 			if (err)
490 				goto done;
491 
492 			if (asprintf(&branchname, "refs/heads/%s",
493 			    refname + ref_prefixlen) == -1) {
494 				err = got_error_from_errno("asprintf");
495 				goto done;
496 			}
497 			err = got_pathlist_append(&have_refs, branchname, id);
498 			if (err) {
499 				free(branchname);
500 				goto done;
501 			}
502 		}
503 	}
504 
505 	if (list_refs_only) {
506 		packfd = got_opentempfd();
507 		if (packfd == -1) {
508 			err = got_error_from_errno("got_opentempfd");
509 			goto done;
510 		}
511 	} else {
512 		if (asprintf(&path, "%s/%s/fetching.pack",
513 		    repo_path, GOT_OBJECTS_PACK_DIR) == -1) {
514 			err = got_error_from_errno("asprintf");
515 			goto done;
516 		}
517 		err = got_opentemp_named_fd(&tmppackpath, &packfd, path);
518 		free(path);
519 		if (err)
520 			goto done;
521 	}
522 	npackfd = dup(packfd);
523 	if (npackfd == -1) {
524 		err = got_error_from_errno("dup");
525 		goto done;
526 	}
527 	if (list_refs_only) {
528 		idxfd = got_opentempfd();
529 		if (idxfd == -1) {
530 			err = got_error_from_errno("got_opentempfd");
531 			goto done;
532 		}
533 	} else {
534 		if (asprintf(&path, "%s/%s/fetching.idx",
535 		    repo_path, GOT_OBJECTS_PACK_DIR) == -1) {
536 			err = got_error_from_errno("asprintf");
537 			goto done;
538 		}
539 		err = got_opentemp_named_fd(&tmpidxpath, &idxfd, path);
540 		free(path);
541 		if (err)
542 			goto done;
543 	}
544 	nidxfd = dup(idxfd);
545 	if (nidxfd == -1) {
546 		err = got_error_from_errno("dup");
547 		goto done;
548 	}
549 
550 	for (i = 0; i < nitems(tmpfds); i++) {
551 		tmpfds[i] = got_opentempfd();
552 		if (tmpfds[i] == -1) {
553 			err = got_error_from_errno("got_opentempfd");
554 			goto done;
555 		}
556 	}
557 
558 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fetchfds) == -1) {
559 		err = got_error_from_errno("socketpair");
560 		goto done;
561 	}
562 
563 	fetchpid = fork();
564 	if (fetchpid == -1) {
565 		err = got_error_from_errno("fork");
566 		goto done;
567 	} else if (fetchpid == 0){
568 		got_privsep_exec_child(imsg_fetchfds,
569 		    GOT_PATH_PROG_FETCH_PACK, tmppackpath);
570 	}
571 
572 	if (close(imsg_fetchfds[1]) != 0) {
573 		err = got_error_from_errno("close");
574 		goto done;
575 	}
576 	imsg_init(&fetchibuf, imsg_fetchfds[0]);
577 	nfetchfd = dup(fetchfd);
578 	if (nfetchfd == -1) {
579 		err = got_error_from_errno("dup");
580 		goto done;
581 	}
582 	err = got_privsep_send_fetch_req(&fetchibuf, nfetchfd, &have_refs,
583 	    fetch_all_branches, wanted_branches, list_refs_only);
584 	if (err != NULL)
585 		goto done;
586 	nfetchfd = -1;
587 	err = got_privsep_send_fetch_outfd(&fetchibuf, npackfd);
588 	if (err != NULL)
589 		goto done;
590 	npackfd = dup(packfd);
591 	if (npackfd == -1) {
592 		err = got_error_from_errno("dup");
593 		goto done;
594 	}
595 
596 	packfile_size = 0;
597 	progress = calloc(GOT_FETCH_PKTMAX, 1);
598 	if (progress == NULL) {
599 		err = got_error_from_errno("calloc");
600 		goto done;
601 	}
602 	while (!done) {
603 		struct got_object_id *id = NULL;
604 		char *refname = NULL;
605 		char *server_progress = NULL;
606 		off_t packfile_size_cur = 0;
607 
608 		err = got_privsep_recv_fetch_progress(&done,
609 		    &id, &refname, symrefs, &server_progress,
610 		    &packfile_size_cur, &fetchibuf);
611 		if (err != NULL)
612 			goto done;
613 		if (done) {
614 			if (packfile_size > 0)
615 				*pack_hash = id;
616 			else
617 				free(id);
618 		} else if (refname && id) {
619 			err = got_pathlist_insert(NULL, refs, refname, id);
620 			if (err)
621 				goto done;
622 		} else if (server_progress) {
623 			char *p;
624 			/*
625 			 * XXX git-daemon tends to send batched output with
626 			 * lines spanning separate packets. Buffer progress
627 			 * output until we see a CR or LF to avoid giving
628 			 * partial lines of progress output to the callback.
629 			 */
630 			if (strlcat(progress, server_progress,
631 			    GOT_FETCH_PKTMAX) >= GOT_FETCH_PKTMAX) {
632 				progress[0] = '\0'; /* discard */
633 				continue;
634 			}
635 			while ((p = strchr(progress, '\r')) != NULL ||
636 			    (p = strchr(progress, '\n')) != NULL) {
637 				char *s;
638 				size_t n;
639 				char c = *p;
640 				*p = '\0';
641 				if (asprintf(&s, "%s%s", progress,
642 				    c == '\n' ? "\n" : "") == -1) {
643 					err = got_error_from_errno("asprintf");
644 					goto done;
645 				}
646 				err = progress_cb(progress_arg, s,
647 				    packfile_size_cur, 0, 0, 0, 0);
648 				free(s);
649 				if (err)
650 					break;
651 				n = strlen(progress);
652 				if (n < GOT_FETCH_PKTMAX - 1) {
653 					memmove(progress, &progress[n + 1],
654 					    GOT_FETCH_PKTMAX - n - 1);
655 				} else
656 					progress[0] = '\0';
657 			}
658 			free(server_progress);
659 			if (err)
660 				goto done;
661 		} else if (packfile_size_cur != packfile_size) {
662 			err = progress_cb(progress_arg, NULL,
663 			    packfile_size_cur, 0, 0, 0, 0);
664 			if (err)
665 				break;
666 			packfile_size = packfile_size_cur;
667 		}
668 	}
669 	if (waitpid(fetchpid, &fetchstatus, 0) == -1) {
670 		err = got_error_from_errno("waitpid");
671 		goto done;
672 	}
673 
674 	/* If zero data was fetched without error we are already up-to-date. */
675 	if (packfile_size == 0)
676 		goto done;
677 
678 	if (lseek(packfd, 0, SEEK_SET) == -1) {
679 		err = got_error_from_errno("lseek");
680 		goto done;
681 	}
682 	err = check_pack_hash(packfd, packfile_size, (*pack_hash)->sha1);
683 	if (err)
684 		goto done;
685  
686 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_idxfds) == -1) {
687 		err = got_error_from_errno("socketpair");
688 		goto done;
689 	}
690 	idxpid = fork();
691 	if (idxpid == -1) {
692 		err= got_error_from_errno("fork");
693 		goto done;
694 	} else if (idxpid == 0)
695 		got_privsep_exec_child(imsg_idxfds,
696 		    GOT_PATH_PROG_INDEX_PACK, tmppackpath);
697 	if (close(imsg_idxfds[1]) != 0) {
698 		err = got_error_from_errno("close");
699 		goto done;
700 	}
701 	imsg_init(&idxibuf, imsg_idxfds[0]);
702 
703 	err = got_privsep_send_index_pack_req(&idxibuf, (*pack_hash)->sha1,
704 	    npackfd);
705 	if (err != NULL)
706 		goto done;
707 	npackfd = -1;
708 	err = got_privsep_send_index_pack_outfd(&idxibuf, nidxfd);
709 	if (err != NULL)
710 		goto done;
711 	nidxfd = -1;
712 	for (i = 0; i < nitems(tmpfds); i++) {
713 		err = got_privsep_send_tmpfd(&idxibuf, tmpfds[i]);
714 		if (err != NULL)
715 			goto done;
716 		tmpfds[i] = -1;
717 	}
718 	done = 0;
719 	while (!done) {
720 		int nobj_total, nobj_indexed, nobj_loose, nobj_resolved;
721 
722 		err = got_privsep_recv_index_progress(&done, &nobj_total,
723 		    &nobj_indexed, &nobj_loose, &nobj_resolved,
724 		    &idxibuf);
725 		if (err != NULL)
726 			goto done;
727 		if (nobj_indexed != 0) {
728 			err = progress_cb(progress_arg, NULL,
729 			    packfile_size, nobj_total,
730 			    nobj_indexed, nobj_loose, nobj_resolved);
731 			if (err)
732 				break;
733 		}
734 		imsg_clear(&idxibuf);
735 	}
736 	if (close(imsg_idxfds[0]) == -1) {
737 		err = got_error_from_errno("close");
738 		goto done;
739 	}
740 	if (waitpid(idxpid, &idxstatus, 0) == -1) {
741 		err = got_error_from_errno("waitpid");
742 		goto done;
743 	}
744 
745 	err = got_object_id_str(&id_str, *pack_hash);
746 	if (err)
747 		goto done;
748 	if (asprintf(&packpath, "%s/%s/pack-%s.pack",
749 	    repo_path, GOT_OBJECTS_PACK_DIR, id_str) == -1) {
750 		err = got_error_from_errno("asprintf");
751 		goto done;
752 	}
753 
754 	if (asprintf(&idxpath, "%s/%s/pack-%s.idx",
755 	    repo_path, GOT_OBJECTS_PACK_DIR, id_str) == -1) {
756 		err = got_error_from_errno("asprintf");
757 		goto done;
758 	}
759 
760 	if (rename(tmppackpath, packpath) == -1) {
761 		err = got_error_from_errno3("rename", tmppackpath, packpath);
762 		goto done;
763 	}
764 	free(tmppackpath);
765 	tmppackpath = NULL;
766 	if (rename(tmpidxpath, idxpath) == -1) {
767 		err = got_error_from_errno3("rename", tmpidxpath, idxpath);
768 		goto done;
769 	}
770 	free(tmpidxpath);
771 	tmpidxpath = NULL;
772 
773 done:
774 	if (tmppackpath && unlink(tmppackpath) == -1 && err == NULL)
775 		err = got_error_from_errno2("unlink", tmppackpath);
776 	if (tmpidxpath && unlink(tmpidxpath) == -1 && err == NULL)
777 		err = got_error_from_errno2("unlink", tmpidxpath);
778 	if (nfetchfd != -1 && close(nfetchfd) == -1 && err == NULL)
779 		err = got_error_from_errno("close");
780 	if (npackfd != -1 && close(npackfd) == -1 && err == NULL)
781 		err = got_error_from_errno("close");
782 	if (packfd != -1 && close(packfd) == -1 && err == NULL)
783 		err = got_error_from_errno("close");
784 	if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
785 		err = got_error_from_errno("close");
786 	for (i = 0; i < nitems(tmpfds); i++) {
787 		if (tmpfds[i] != -1 && close(tmpfds[i]) == -1 && err == NULL)
788 			err = got_error_from_errno("close");
789 	}
790 	free(tmppackpath);
791 	free(tmpidxpath);
792 	free(idxpath);
793 	free(packpath);
794 	free(ref_prefix);
795 	free(progress);
796 
797 	TAILQ_FOREACH(pe, &have_refs, entry) {
798 		free((char *)pe->path);
799 		free(pe->data);
800 	}
801 	got_pathlist_free(&have_refs);
802 	got_ref_list_free(&my_refs);
803 	if (err) {
804 		free(*pack_hash);
805 		*pack_hash = NULL;
806 		TAILQ_FOREACH(pe, refs, entry) {
807 			free((void *)pe->path);
808 			free(pe->data);
809 		}
810 		got_pathlist_free(refs);
811 		TAILQ_FOREACH(pe, symrefs, entry) {
812 			free((void *)pe->path);
813 			free(pe->data);
814 		}
815 		got_pathlist_free(symrefs);
816 	}
817 	return err;
818 }