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Date:: Tue Oct 20 22:43:59 2020 UTC
Message:: indentation fixes
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1 /*
2  * Copyright (c) 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/queue.h>
19 #include <sys/uio.h>
20 #include <sys/time.h>
21 #include <sys/stat.h>
22 
23 #include <stdint.h>
24 #include <errno.h>
25 #include <imsg.h>
26 #include <limits.h>
27 #include <signal.h>
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31 #include <ctype.h>
32 #include <sha1.h>
33 #include <fcntl.h>
34 #include <unistd.h>
35 #include <zlib.h>
36 #include <err.h>
37 
38 #include "got_error.h"
39 #include "got_object.h"
40 #include "got_path.h"
41 #include "got_version.h"
42 #include "got_fetch.h"
43 #include "got_reference.h"
44 
45 #include "got_lib_sha1.h"
46 #include "got_lib_delta.h"
47 #include "got_lib_object.h"
48 #include "got_lib_object_parse.h"
49 #include "got_lib_privsep.h"
50 #include "got_lib_pack.h"
51 
52 #ifndef nitems
53 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
54 #endif
55 
56 struct got_object *indexed;
57 static int chattygot;
58 static struct got_object_id zhash = {.sha1={0}};
59 
60 static const struct got_error *
61 readn(ssize_t *off, int fd, void *buf, size_t n)
62 {
63 	ssize_t r;
64 
65 	*off = 0;
66 	while (*off != n) {
67 		r = read(fd, buf + *off, n - *off);
68 		if (r == -1)
69 			return got_error_from_errno("read");
70 		if (r == 0)
71 			return NULL;
72 		*off += r;
73 	}
74 	return NULL;
75 }
76 
77 static const struct got_error *
78 flushpkt(int fd)
79 {
80 	ssize_t w;
81 
82 	if (chattygot > 1)
83 		fprintf(stderr, "%s: writepkt: 0000\n", getprogname());
84 
85 	w = write(fd, "0000", 4);
86 	if (w == -1)
87 		return got_error_from_errno("write");
88 	if (w != 4)
89 		return got_error(GOT_ERR_IO);
90 	return NULL;
91 }
92 
93 /*
94  * Packet header contains a 4-byte hexstring which specifies the length
95  * of data which follows.
96  */
97 static const struct got_error *
98 read_pkthdr(int *datalen, int fd)
99 {
100 	static const struct got_error *err = NULL;
101 	char lenstr[5];
102 	long len;
103 	char *e;
104 	int n, i;
105 	ssize_t r;
106 
107 	*datalen = 0;
108 
109 	err = readn(&r, fd, lenstr, 4);
110 	if (err)
111 		return err;
112 	if (r == 0) {
113 		/* implicit "0000" */
114 		if (chattygot > 1)
115 			fprintf(stderr, "%s: readpkt: 0000\n", getprogname());
116 		return NULL;
117 	}
118 	if (r != 4)
119 		return got_error_msg(GOT_ERR_BAD_PACKET,
120 		    "wrong packet header length");
121 
122 	lenstr[4] = '\0';
123 	for (i = 0; i < 4; i++) {
124 		if (!isprint((unsigned char)lenstr[i]))
125 			return got_error_msg(GOT_ERR_BAD_PACKET,
126 			    "unprintable character in packet length field");
127 	}
128 	for (i = 0; i < 4; i++) {
129 		if (!isxdigit((unsigned char)lenstr[i])) {
130 			if (chattygot)
131 				fprintf(stderr, "%s: bad length: '%s'\n",
132 				    getprogname(), lenstr);
133 			return got_error_msg(GOT_ERR_BAD_PACKET,
134 			    "packet length not specified in hex");
135 		}
136 	}
137 	errno = 0;
138 	len = strtol(lenstr, &e, 16);
139 	if (lenstr[0] == '\0' || *e != '\0')
140 		return got_error(GOT_ERR_BAD_PACKET);
141 	if (errno == ERANGE && (len == LONG_MAX || len == LONG_MIN))
142 		return got_error_msg(GOT_ERR_BAD_PACKET, "bad packet length");
143 	if (len > INT_MAX || len < INT_MIN)
144 		return got_error_msg(GOT_ERR_BAD_PACKET, "bad packet length");
145 	n = len;
146 	if (n == 0)
147 		return NULL;
148 	if (n <= 4)
149 		return got_error_msg(GOT_ERR_BAD_PACKET, "packet too short");
150 	n  -= 4;
151 
152 	*datalen = n;
153 	return NULL;
154 }
155 
156 static const struct got_error *
157 readpkt(int *outlen, int fd, char *buf, int buflen)
158 {
159 	const struct got_error *err = NULL;
160 	int datalen, i;
161 	ssize_t n;
162 
163 	err = read_pkthdr(&datalen, fd);
164 	if (err)
165 		return err;
166 
167 	if (datalen > buflen)
168 		return got_error(GOT_ERR_NO_SPACE);
169 
170 	err = readn(&n, fd, buf, datalen);
171 	if (err)
172 		return err;
173 	if (n != datalen)
174 		return got_error_msg(GOT_ERR_BAD_PACKET, "short packet");
175 
176 	if (chattygot > 1) {
177 		fprintf(stderr, "%s: readpkt: %zd:\t", getprogname(), n);
178 		for (i = 0; i < n; i++) {
179 			if (isprint(buf[i]))
180 				fputc(buf[i], stderr);
181 			else
182 				fprintf(stderr, "[0x%.2x]", buf[i]);
183 		}
184 		fputc('\n', stderr);
185 	}
186 
187 	*outlen = n;
188 	return NULL;
189 }
190 
191 static const struct got_error *
192 writepkt(int fd, char *buf, int nbuf)
193 {
194 	char len[5];
195 	int i;
196 	ssize_t w;
197 
198 	if (snprintf(len, sizeof(len), "%04x", nbuf + 4) >= sizeof(len))
199 		return got_error(GOT_ERR_NO_SPACE);
200 	w = write(fd, len, 4);
201 	if (w == -1)
202 		return got_error_from_errno("write");
203 	if (w != 4)
204 		return got_error(GOT_ERR_IO);
205 	w = write(fd, buf, nbuf);
206 	if (w == -1)
207 		return got_error_from_errno("write");
208 	if (w != nbuf)
209 		return got_error(GOT_ERR_IO);
210 	if (chattygot > 1) {
211 		fprintf(stderr, "%s: writepkt: %s:\t", getprogname(), len);
212 		for (i = 0; i < nbuf; i++) {
213 			if (isprint(buf[i]))
214 				fputc(buf[i], stderr);
215 			else
216 				fprintf(stderr, "[0x%.2x]", buf[i]);
217 		}
218 		fputc('\n', stderr);
219 	}
220 	return NULL;
221 }
222 
223 static void
224 match_remote_ref(struct got_pathlist_head *have_refs,
225     struct got_object_id *my_id, char *refname)
226 {
227 	struct got_pathlist_entry *pe;
228 
229 	/* XXX zero-hash signifies we don't have this ref;
230 	 * we should use a flag instead */
231 	memset(my_id, 0, sizeof(*my_id));
232 
233 	TAILQ_FOREACH(pe, have_refs, entry) {
234 		struct got_object_id *id = pe->data;
235 		if (strcmp(pe->path, refname) == 0) { 
236 			memcpy(my_id, id, sizeof(*my_id));
237 			break;
238 		}
239 	}
240 }
241 
242 static int
243 match_branch(const char *branch, const char *wanted_branch)
244 {
245 	if (strncmp(branch, "refs/heads/", 11) != 0)
246 		return 0;
247 
248 	if (strncmp(wanted_branch, "refs/heads/", 11) == 0)
249 		wanted_branch += 11;
250 
251 	return (strcmp(branch + 11, wanted_branch) == 0);
252 }
253 
254 static int
255 match_wanted_ref(const char *refname, const char *wanted_ref)
256 {
257 	if (strncmp(refname, "refs/", 5) != 0)
258 		return 0;
259 	refname += 5;
260 
261 	/*
262 	 * Prevent fetching of references that won't make any
263 	 * sense outside of the remote repository's context.
264 	 */
265 	if (strncmp(refname, "got/", 4) == 0)
266 		return 0;
267 	if (strncmp(refname, "remotes/", 8) == 0)
268 		return 0;
269 
270 	if (strncmp(wanted_ref, "refs/", 5) == 0)
271 		wanted_ref += 5;
272 
273 	/* Allow prefix match. */
274 	if (got_path_is_child(refname, wanted_ref, strlen(wanted_ref)))
275 		return 1;
276 
277 	/* Allow exact match. */
278 	return (strcmp(refname, wanted_ref) == 0);
279 }
280 
281 static const struct got_error *
282 tokenize_refline(char **tokens, char *line, int len, int maxtokens)
283 {
284 	const struct got_error *err = NULL;
285 	char *p;
286 	size_t i, n = 0;
287 
288 	for (i = 0; i < maxtokens; i++)
289 		tokens[i] = NULL;
290 
291 	for (i = 0; n < len && i < maxtokens; i++) {
292 		while (isspace(*line)) {
293 			line++;
294 			n++;
295 		}
296 		p = line;
297 		while (*line != '\0' &&
298 		    (!isspace(*line) || i == maxtokens - 1)) {
299 			line++;
300 			n++;
301 		}
302 		tokens[i] = strndup(p, line - p);
303 		if (tokens[i] == NULL) {
304 			err = got_error_from_errno("strndup");
305 			goto done;
306 		}
307 		/* Skip \0 field-delimiter at end of token. */
308 		while (line[0] == '\0' && n < len) {
309 			line++;
310 			n++;
311 		}
312 	}
313 	if (i <= 2)
314 		err = got_error(GOT_ERR_NOT_REF);
315 done:
316 	if (err) {
317 		int j;
318 		for (j = 0; j < i; j++) {
319 			free(tokens[j]);
320 			tokens[j] = NULL;
321 		}
322 	}
323 	return err;
324 }
325 
326 static const struct got_error *
327 parse_refline(char **id_str, char **refname, char **server_capabilities,
328     char *line, int len)
329 {
330 	const struct got_error *err = NULL;
331 	char *tokens[3];
332 
333 	err = tokenize_refline(tokens, line, len, nitems(tokens));
334 	if (err)
335 		return err;
336 
337 	if (tokens[0])
338 		*id_str = tokens[0];
339 	if (tokens[1])
340 		*refname = tokens[1];
341 	if (tokens[2]) {
342 		char *p;
343 		*server_capabilities = tokens[2];
344 		p = strrchr(*server_capabilities, '\n');
345 		if (p)
346 			*p = '\0';
347 	}
348 
349 	return NULL;
350 }
351 
352 #define GOT_CAPA_AGENT			"agent"
353 #define GOT_CAPA_OFS_DELTA		"ofs-delta"
354 #define GOT_CAPA_SIDE_BAND_64K		"side-band-64k"
355 
356 #define GOT_SIDEBAND_PACKFILE_DATA	1
357 #define GOT_SIDEBAND_PROGRESS_INFO	2
358 #define GOT_SIDEBAND_ERROR_INFO		3
359 
360 
361 struct got_capability {
362 	const char *key;
363 	const char *value;
364 };
365 static const struct got_capability got_capabilities[] = {
366 	{ GOT_CAPA_AGENT, "got/" GOT_VERSION_STR },
367 	{ GOT_CAPA_OFS_DELTA, NULL },
368 	{ GOT_CAPA_SIDE_BAND_64K, NULL },
369 };
370 
371 static const struct got_error *
372 match_capability(char **my_capabilities, const char *capa,
373     const struct got_capability *mycapa)
374 {
375 	char *equalsign;
376 	char *s;
377 
378 	equalsign = strchr(capa, '=');
379 	if (equalsign) {
380 		if (strncmp(capa, mycapa->key, equalsign - capa) != 0)
381 			return NULL;
382 	} else {
383 		if (strcmp(capa, mycapa->key) != 0)
384 			return NULL;
385 	}
386 
387 	if (asprintf(&s, "%s %s%s%s",
388 	    *my_capabilities != NULL ? *my_capabilities : "",
389 	    mycapa->key,
390 	    mycapa->value != NULL ? "=" : "",
391 	    mycapa->value != NULL? mycapa->value : "") == -1)
392 		return got_error_from_errno("asprintf");
393 
394 	free(*my_capabilities);
395 	*my_capabilities = s;
396 	return NULL;
397 }
398 
399 static const struct got_error *
400 add_symref(struct got_pathlist_head *symrefs, char *capa)
401 {
402 	const struct got_error *err = NULL;
403 	char *colon, *name = NULL, *target = NULL;
404 
405 	/* Need at least "A:B" */
406 	if (strlen(capa) < 3)
407 		return NULL;
408 
409 	colon = strchr(capa, ':');
410 	if (colon == NULL)
411 		return NULL;
412 
413 	*colon = '\0';
414 	name = strdup(capa);
415 	if (name == NULL)
416 		return got_error_from_errno("strdup");
417 
418 	target = strdup(colon + 1);
419 	if (target == NULL) {
420 		err = got_error_from_errno("strdup");
421 		goto done;
422 	}
423 
424 	/* We can't validate the ref itself here. The main process will. */
425 	err = got_pathlist_append(symrefs, name, target);
426 done:
427 	if (err) {
428 		free(name);
429 		free(target);
430 	}
431 	return err;
432 }
433 
434 static const struct got_error *
435 match_capabilities(char **my_capabilities, struct got_pathlist_head *symrefs,
436     char *server_capabilities)
437 {
438 	const struct got_error *err = NULL;
439 	char *capa, *equalsign;
440 	int i;
441 
442 	*my_capabilities = NULL;
443 	do {
444 		capa = strsep(&server_capabilities, " ");
445 		if (capa == NULL)
446 			return NULL;
447 
448 		equalsign = strchr(capa, '=');
449 		if (equalsign != NULL &&
450 		    strncmp(capa, "symref", equalsign - capa) == 0) {
451 			err = add_symref(symrefs, equalsign + 1);
452 			if (err)
453 				break;
454 			continue;
455 		}
456 
457 		for (i = 0; i < nitems(got_capabilities); i++) {
458 			err = match_capability(my_capabilities,
459 			    capa, &got_capabilities[i]);
460 			if (err)
461 				break;
462 		}
463 	} while (capa);
464 
465 	if (*my_capabilities == NULL) {
466 		*my_capabilities = strdup("");
467 		if (*my_capabilities == NULL)
468 			err = got_error_from_errno("strdup");
469 	}
470 	return err;
471 }
472 
473 static const struct got_error *
474 send_fetch_server_progress(struct imsgbuf *ibuf, const char *msg, size_t msglen)
475 {
476 	if (msglen > MAX_IMSGSIZE - IMSG_HEADER_SIZE)
477 		return got_error(GOT_ERR_NO_SPACE);
478 
479 	if (msglen == 0)
480 		return NULL;
481 
482 	if (imsg_compose(ibuf, GOT_IMSG_FETCH_SERVER_PROGRESS, 0, 0, -1,
483 	    msg, msglen) == -1)
484 		return got_error_from_errno(
485 		    "imsg_compose FETCH_SERVER_PROGRESS");
486 
487 	return got_privsep_flush_imsg(ibuf);
488 }
489 
490 static const struct got_error *
491 send_fetch_download_progress(struct imsgbuf *ibuf, off_t bytes)
492 {
493 	if (imsg_compose(ibuf, GOT_IMSG_FETCH_DOWNLOAD_PROGRESS, 0, 0, -1,
494 	    &bytes, sizeof(bytes)) == -1)
495 		return got_error_from_errno(
496 		    "imsg_compose FETCH_DOWNLOAD_PROGRESS");
497 
498 	return got_privsep_flush_imsg(ibuf);
499 }
500 
501 static const struct got_error *
502 send_fetch_done(struct imsgbuf *ibuf, uint8_t *pack_sha1)
503 {
504 	if (imsg_compose(ibuf, GOT_IMSG_FETCH_DONE, 0, 0, -1,
505 	    pack_sha1, SHA1_DIGEST_LENGTH) == -1)
506 		return got_error_from_errno("imsg_compose FETCH");
507 	return got_privsep_flush_imsg(ibuf);
508 }
509 
510 
511 
512 static const struct got_error *
513 fetch_progress(struct imsgbuf *ibuf, const char *buf, size_t len)
514 {
515 	int i;
516 
517 	if (len == 0)
518 		return NULL;
519 
520 	/*
521 	 * Truncate messages which exceed the maximum imsg payload size.
522 	 * Server may send up to 64k.
523 	 */
524 	if (len > MAX_IMSGSIZE - IMSG_HEADER_SIZE)
525 		len = MAX_IMSGSIZE - IMSG_HEADER_SIZE;
526 
527 	/* Only allow printable ASCII. */
528 	for (i = 0; i < len; i++) {
529 		if (isprint((unsigned char)buf[i]) ||
530 		    isspace((unsigned char)buf[i]))
531 			continue;
532 		return got_error_msg(GOT_ERR_BAD_PACKET,
533 		    "non-printable progress message received from server");
534 	}
535 
536 	return send_fetch_server_progress(ibuf, buf, len);
537 }
538 
539 static const struct got_error *
540 fetch_error(const char *buf, size_t len)
541 {
542 	static char msg[1024];
543 	int i;
544 
545 	for (i = 0; i < len && i < sizeof(msg) - 1; i++) {
546 		if (!isprint(buf[i]))
547 			return got_error_msg(GOT_ERR_BAD_PACKET,
548 			    "non-printable error message received from server");
549 		msg[i] = buf[i];
550 	}
551 	msg[i] = '\0';
552 	return got_error_msg(GOT_ERR_FETCH_FAILED, msg);
553 }
554 
555 static const struct got_error *
556 send_fetch_symrefs(struct imsgbuf *ibuf, struct got_pathlist_head *symrefs)
557 {
558 	const struct got_error *err = NULL;
559 	struct ibuf *wbuf;
560 	size_t len, nsymrefs = 0;
561 	struct got_pathlist_entry *pe;
562 
563 	len = sizeof(struct got_imsg_fetch_symrefs);
564 	TAILQ_FOREACH(pe, symrefs, entry) {
565 		const char *target = pe->data;
566 		len += sizeof(struct got_imsg_fetch_symref) +
567 		    pe->path_len + strlen(target);
568 		nsymrefs++;
569 	}
570 
571 	if (len >= MAX_IMSGSIZE - IMSG_HEADER_SIZE)
572 		return got_error(GOT_ERR_NO_SPACE);
573 
574 	wbuf = imsg_create(ibuf, GOT_IMSG_FETCH_SYMREFS, 0, 0, len);
575 	if (wbuf == NULL)
576 		return got_error_from_errno("imsg_create FETCH_SYMREFS");
577 
578 	/* Keep in sync with struct got_imsg_fetch_symrefs definition! */
579 	if (imsg_add(wbuf, &nsymrefs, sizeof(nsymrefs)) == -1) {
580 		err = got_error_from_errno("imsg_add FETCH_SYMREFS");
581 		ibuf_free(wbuf);
582 		return err;
583 	}
584 
585 	TAILQ_FOREACH(pe, symrefs, entry) {
586 		const char *name = pe->path;
587 		size_t name_len = pe->path_len;
588 		const char *target = pe->data;
589 		size_t target_len = strlen(target);
590 
591 		/* Keep in sync with struct got_imsg_fetch_symref definition! */
592 		if (imsg_add(wbuf, &name_len, sizeof(name_len)) == -1) {
593 			err = got_error_from_errno("imsg_add FETCH_SYMREFS");
594 			ibuf_free(wbuf);
595 			return err;
596 		}
597 		if (imsg_add(wbuf, &target_len, sizeof(target_len)) == -1) {
598 			err = got_error_from_errno("imsg_add FETCH_SYMREFS");
599 			ibuf_free(wbuf);
600 			return err;
601 		}
602 		if (imsg_add(wbuf, name, name_len) == -1) {
603 			err = got_error_from_errno("imsg_add FETCH_SYMREFS");
604 			ibuf_free(wbuf);
605 			return err;
606 		}
607 		if (imsg_add(wbuf, target, target_len) == -1) {
608 			err = got_error_from_errno("imsg_add FETCH_SYMREFS");
609 			ibuf_free(wbuf);
610 			return err;
611 		}
612 	}
613 
614 	wbuf->fd = -1;
615 	imsg_close(ibuf, wbuf);
616 	return got_privsep_flush_imsg(ibuf);
617 }
618 
619 static const struct got_error *
620 send_fetch_ref(struct imsgbuf *ibuf, struct got_object_id *refid,
621     const char *refname)
622 {
623 	const struct got_error *err = NULL;
624 	struct ibuf *wbuf;
625 	size_t len, reflen = strlen(refname);
626 
627 	len = sizeof(struct got_imsg_fetch_ref) + reflen;
628 	if (len >= MAX_IMSGSIZE - IMSG_HEADER_SIZE)
629 		return got_error(GOT_ERR_NO_SPACE);
630 
631 	wbuf = imsg_create(ibuf, GOT_IMSG_FETCH_REF, 0, 0, len);
632 	if (wbuf == NULL)
633 		return got_error_from_errno("imsg_create FETCH_REF");
634 
635 	/* Keep in sync with struct got_imsg_fetch_ref definition! */
636 	if (imsg_add(wbuf, refid->sha1, SHA1_DIGEST_LENGTH) == -1) {
637 		err = got_error_from_errno("imsg_add FETCH_REF");
638 		ibuf_free(wbuf);
639 		return err;
640 	}
641 	if (imsg_add(wbuf, refname, reflen) == -1) {
642 		err = got_error_from_errno("imsg_add FETCH_REF");
643 		ibuf_free(wbuf);
644 		return err;
645 	}
646 
647 	wbuf->fd = -1;
648 	imsg_close(ibuf, wbuf);
649 	return got_privsep_flush_imsg(ibuf);
650 }
651 
652 static const struct got_error *
653 fetch_pack(int fd, int packfd, uint8_t *pack_sha1,
654     struct got_pathlist_head *have_refs, int fetch_all_branches,
655     struct got_pathlist_head *wanted_branches,
656     struct got_pathlist_head *wanted_refs, int list_refs_only,
657     struct imsgbuf *ibuf)
658 {
659 	const struct got_error *err = NULL;
660 	char buf[GOT_FETCH_PKTMAX];
661 	char hashstr[SHA1_DIGEST_STRING_LENGTH];
662 	struct got_object_id *have, *want;
663 	int is_firstpkt = 1, nref = 0, refsz = 16;
664 	int i, n, nwant = 0, nhave = 0, acked = 0;
665 	off_t packsz = 0, last_reported_packsz = 0;
666 	char *id_str = NULL, *refname = NULL;
667 	char *server_capabilities = NULL, *my_capabilities = NULL;
668 	const char *default_branch = NULL;
669 	struct got_pathlist_head symrefs;
670 	struct got_pathlist_entry *pe;
671 	int sent_my_capabilites = 0, have_sidebands = 0;
672 	int found_branch = 0;
673 	SHA1_CTX sha1_ctx;
674 	uint8_t sha1_buf[SHA1_DIGEST_LENGTH];
675 	size_t sha1_buf_len = 0;
676 	ssize_t w;
677 
678 	TAILQ_INIT(&symrefs);
679 	SHA1Init(&sha1_ctx);
680 
681 	have = malloc(refsz * sizeof(have[0]));
682 	if (have == NULL)
683 		return got_error_from_errno("malloc");
684 	want = malloc(refsz * sizeof(want[0]));
685 	if (want == NULL) {
686 		err = got_error_from_errno("malloc");
687 		goto done;
688 	}
689 	while (1) {
690 		err = readpkt(&n, fd, buf, sizeof(buf));
691 		if (err)
692 			goto done;
693 		if (n == 0)
694 			break;
695 		if (n >= 4 && strncmp(buf, "ERR ", 4) == 0) {
696 			err = fetch_error(&buf[4], n - 4);
697 			goto done;
698 		}
699 		err = parse_refline(&id_str, &refname, &server_capabilities,
700 		    buf, n);
701 		if (err)
702 			goto done;
703 		if (is_firstpkt) {
704 			if (chattygot && server_capabilities[0] != '\0')
705 				fprintf(stderr, "%s: server capabilities: %s\n",
706 				    getprogname(), server_capabilities);
707 			err = match_capabilities(&my_capabilities, &symrefs,
708 			    server_capabilities);
709 			if (err)
710 				goto done;
711 			if (chattygot)
712 				fprintf(stderr, "%s: my capabilities:%s\n",
713 				    getprogname(), my_capabilities);
714 			err = send_fetch_symrefs(ibuf, &symrefs);
715 			if (err)
716 				goto done;
717 			is_firstpkt = 0;
718 			if (!fetch_all_branches) {
719 				TAILQ_FOREACH(pe, &symrefs, entry) {
720 					const char *name = pe->path;
721 					const char *symref_target = pe->data;
722 					if (strcmp(name, GOT_REF_HEAD) != 0)
723 						continue;
724 					default_branch = symref_target;
725 					break;
726 				}
727 			}
728 			continue;
729 		}
730 		if (strstr(refname, "^{}")) {
731 			if (chattygot) {
732 				fprintf(stderr, "%s: ignoring %s\n",
733 				    getprogname(), refname);
734 			}
735 			continue;
736 		}
737 
738 		if (strncmp(refname, "refs/heads/", 11) == 0) {
739 			if (fetch_all_branches || list_refs_only) {
740 				found_branch = 1;
741 			} else if (!TAILQ_EMPTY(wanted_branches)) {
742 				TAILQ_FOREACH(pe, wanted_branches, entry) {
743 					if (match_branch(refname, pe->path))
744 						break;
745 				}
746 				if (pe == NULL) {
747 					if (chattygot) {
748 						fprintf(stderr,
749 						    "%s: ignoring %s\n",
750 						    getprogname(), refname);
751 					}
752 					continue;
753 				}
754 				found_branch = 1;
755 			} else if (default_branch != NULL) {
756 				if (!match_branch(refname, default_branch)) {
757 					if (chattygot) {
758 						fprintf(stderr,
759 						    "%s: ignoring %s\n",
760 						    getprogname(), refname);
761 					}
762 					continue;
763 				}
764 				found_branch = 1;
765 			}
766 		} else if (strncmp(refname, "refs/tags/", 10) != 0) {
767 			if (!TAILQ_EMPTY(wanted_refs)) {
768 				TAILQ_FOREACH(pe, wanted_refs, entry) {
769 					if (match_wanted_ref(refname, pe->path))
770 						break;
771 				}
772 				if (pe == NULL) {
773 					if (chattygot) {
774 						fprintf(stderr,
775 						    "%s: ignoring %s\n",
776 						    getprogname(), refname);
777 					}
778 					continue;
779 				}
780 				found_branch = 1;
781 			} else if (!list_refs_only) {
782 				if (chattygot) {
783 					fprintf(stderr, "%s: ignoring %s\n",
784 					    getprogname(), refname);
785 				}
786 				continue;
787 			}
788 		}
789 
790 		if (refsz == nref + 1) {
791 			refsz *= 2;
792 			have = reallocarray(have, refsz, sizeof(have[0]));
793 			if (have == NULL) {
794 				err = got_error_from_errno("reallocarray");
795 				goto done;
796 			}
797 			want = reallocarray(want, refsz, sizeof(want[0]));
798 			if (want == NULL) {
799 				err = got_error_from_errno("reallocarray");
800 				goto done;
801 			}
802 		}
803 		if (!got_parse_sha1_digest(want[nref].sha1, id_str)) {
804 			err = got_error(GOT_ERR_BAD_OBJ_ID_STR);
805 			goto done;
806 		}
807 		match_remote_ref(have_refs, &have[nref], refname);
808 		err = send_fetch_ref(ibuf, &want[nref], refname);
809 		if (err)
810 			goto done;
811 
812 		if (chattygot)
813 			fprintf(stderr, "%s: %s will be fetched\n",
814 			    getprogname(), refname);
815 		if (chattygot > 1) {
816 			char *theirs, *mine;
817 			err = got_object_id_str(&theirs, &want[nref]);
818 			if (err)
819 				goto done;
820 			err = got_object_id_str(&mine, &have[nref]);
821 			if (err) {
822 				free(theirs);
823 				goto done;
824 			}
825 			fprintf(stderr, "%s: remote: %s\n%s: local:  %s\n",
826 			    getprogname(), theirs, getprogname(), mine);
827 			free(theirs);
828 			free(mine);
829 		}
830 		nref++;
831 	}
832 
833 	if (list_refs_only)
834 		goto done;
835 
836 	/* Abort if we haven't found any branch to fetch. */
837 	if (!found_branch) {
838 		err = got_error(GOT_ERR_FETCH_NO_BRANCH);
839 		goto done;
840 	}
841 
842 	for (i = 0; i < nref; i++) {
843 		if (got_object_id_cmp(&have[i], &want[i]) == 0)
844 			continue;
845 		got_sha1_digest_to_str(want[i].sha1, hashstr, sizeof(hashstr));
846 		n = snprintf(buf, sizeof(buf), "want %s%s\n", hashstr,
847 		    sent_my_capabilites ? "" : my_capabilities);
848 		if (n >= sizeof(buf)) {
849 			err = got_error(GOT_ERR_NO_SPACE);
850 			goto done;
851 		}
852 		err = writepkt(fd, buf, n);
853 		if (err)
854 			goto done;
855 		sent_my_capabilites = 1;
856 		nwant++;
857 	}
858 	err = flushpkt(fd);
859 	if (err)
860 		goto done;
861 
862 	if (nwant == 0)
863 		goto done;
864 
865 	for (i = 0; i < nref; i++) {
866 		if (got_object_id_cmp(&have[i], &zhash) == 0)
867 			continue;
868 		got_sha1_digest_to_str(have[i].sha1, hashstr, sizeof(hashstr));
869 		n = snprintf(buf, sizeof(buf), "have %s\n", hashstr);
870 		if (n >= sizeof(buf)) {
871 			err = got_error(GOT_ERR_NO_SPACE);
872 			goto done;
873 		}
874 		err = writepkt(fd, buf, n);
875 		if (err)
876 			goto done;
877 		nhave++;
878 	}
879 
880 	while (nhave > 0 && !acked) {
881 		struct got_object_id common_id;
882 
883 		/* The server should ACK the object IDs we need. */
884 		err = readpkt(&n, fd, buf, sizeof(buf));
885 		if (err)
886 			goto done;
887 		if (n >= 4 && strncmp(buf, "ERR ", 4) == 0) {
888 			err = fetch_error(&buf[4], n - 4);
889 			goto done;
890 		}
891 		if (n >= 4 && strncmp(buf, "NAK\n", 4) == 0) {
892 			/* Server has not located our objects yet. */
893 			continue;
894 		}
895 		if (n < 4 + SHA1_DIGEST_STRING_LENGTH ||
896 		    strncmp(buf, "ACK ", 4) != 0) {
897 			err = got_error_msg(GOT_ERR_BAD_PACKET,
898 			    "unexpected message from server");
899 			goto done;
900 		}
901 		if (!got_parse_sha1_digest(common_id.sha1, buf + 4)) {
902 			err = got_error_msg(GOT_ERR_BAD_PACKET,
903 			    "bad object ID in ACK packet from server");
904 			goto done;
905 		}
906 		acked++;
907 	}
908 
909 	n = snprintf(buf, sizeof(buf), "done\n");
910 	err = writepkt(fd, buf, n);
911 	if (err)
912 		goto done;
913 
914 	if (nhave == 0) {
915 		err = readpkt(&n, fd, buf, sizeof(buf));
916 		if (err)
917 			goto done;
918 		if (n != 4 || strncmp(buf, "NAK\n", n) != 0) {
919 			err = got_error_msg(GOT_ERR_BAD_PACKET,
920 			    "unexpected message from server");
921 			goto done;
922 		}
923 	}
924 
925 	if (chattygot)
926 		fprintf(stderr, "%s: fetching...\n", getprogname());
927 
928 	if (my_capabilities != NULL &&
929 	    strstr(my_capabilities, GOT_CAPA_SIDE_BAND_64K) != NULL)
930 		have_sidebands = 1;
931 
932 	while (1) {
933 		ssize_t r = 0;
934 		int datalen = -1;
935 
936 		if (have_sidebands) {
937 			err = read_pkthdr(&datalen, fd);
938 			if (err)
939 				goto done;
940 			if (datalen <= 0)
941 				break;
942 
943 			/* Read sideband channel ID (one byte). */
944 			r = read(fd, buf, 1);
945 			if (r == -1) {
946 				err = got_error_from_errno("read");
947 				goto done;
948 			}
949 			if (r != 1) {
950 				err = got_error_msg(GOT_ERR_BAD_PACKET,
951 				    "short packet");
952 				goto done;
953 			}
954 			if (datalen > sizeof(buf) - 5) {
955 				err = got_error_msg(GOT_ERR_BAD_PACKET,
956 				    "bad packet length");
957 				goto done;
958 			}
959 			datalen--; /* sideband ID has been read */
960 			if (buf[0] == GOT_SIDEBAND_PACKFILE_DATA) {
961 				/* Read packfile data. */
962 				err = readn(&r, fd, buf, datalen);
963 				if (err)
964 					goto done;
965 				if (r != datalen) {
966 					err = got_error_msg(GOT_ERR_BAD_PACKET,
967 					    "packet too short");
968 					goto done;
969 				}
970 			} else if (buf[0] == GOT_SIDEBAND_PROGRESS_INFO) {
971 				err = readn(&r, fd, buf, datalen);
972 				if (err)
973 					goto done;
974 				if (r != datalen) {
975 					err = got_error_msg(GOT_ERR_BAD_PACKET,
976 					    "packet too short");
977 					goto done;
978 				}
979 				err = fetch_progress(ibuf, buf, r);
980 				if (err)
981 					goto done;
982 				continue;
983 			} else if (buf[0] == GOT_SIDEBAND_ERROR_INFO) {
984 				err = readn(&r, fd, buf, datalen);
985 				if (err)
986 					goto done;
987 				if (r != datalen) {
988 					err = got_error_msg(GOT_ERR_BAD_PACKET,
989 					    "packet too short");
990 					goto done;
991 				}
992 				err = fetch_error(buf, r);
993 				goto done;
994 			} else {
995 				err = got_error_msg(GOT_ERR_BAD_PACKET,
996 				    "unknown side-band received from server");
997 				goto done;
998 			}
999 		} else {
1000 			/* No sideband channel. Every byte is packfile data. */
1001 			err = readn(&r, fd, buf, sizeof buf);
1002 			if (err)
1003 				goto done;
1004 			if (r <= 0)
1005 				break;
1006 		}
1007 
1008 		/*
1009 		 * An expected SHA1 checksum sits at the end of the pack file.
1010 		 * Since we don't know the file size ahead of time we have to
1011 		 * keep SHA1_DIGEST_LENGTH bytes buffered and avoid mixing
1012 		 * those bytes into our SHA1 checksum computation until we
1013 		 * know for sure that additional pack file data bytes follow.
1014 		 *
1015 		 * We can assume r > 0 since otherwise the loop would exit.
1016 		 */
1017 		if (r < SHA1_DIGEST_LENGTH) {
1018 			if (sha1_buf_len < SHA1_DIGEST_LENGTH) {
1019 				/*
1020 				 * If there's enough buffered + read data to
1021 				 * fill up the buffer then shift a sufficient
1022 				 * amount of bytes out at the front to make
1023 				 * room, mixing those bytes into the checksum.
1024 				 */
1025 				while (sha1_buf_len > 0 &&
1026 				    sha1_buf_len + r > SHA1_DIGEST_LENGTH) {
1027 					SHA1Update(&sha1_ctx, sha1_buf, 1);
1028 					memmove(sha1_buf, sha1_buf + 1, 1);
1029 					sha1_buf_len--;
1030 				}
1031 
1032 				/* Buffer potential checksum bytes. */
1033 				memcpy(sha1_buf + sha1_buf_len, buf, r);
1034 				sha1_buf_len += r;
1035 			} else {
1036 				/*
1037 				 * Mix in previously buffered bytes which
1038 				 * are not part of the checksum after all.
1039 				 */
1040 				SHA1Update(&sha1_ctx, sha1_buf, r);
1041 
1042 				/* Update potential checksum buffer. */
1043 				memmove(sha1_buf, sha1_buf + r,
1044 				    sha1_buf_len - r);
1045 				memcpy(sha1_buf + sha1_buf_len - r, buf, r);
1046 			}
1047 		} else {
1048 			/* Mix in any previously buffered bytes. */
1049 			SHA1Update(&sha1_ctx, sha1_buf, sha1_buf_len);
1050 
1051 			/* Mix in bytes read minus potential checksum bytes. */
1052 			SHA1Update(&sha1_ctx, buf, r - SHA1_DIGEST_LENGTH);
1053 
1054 			/* Buffer potential checksum bytes. */
1055 			memcpy(sha1_buf, buf + r - SHA1_DIGEST_LENGTH,
1056 			    SHA1_DIGEST_LENGTH);
1057 			sha1_buf_len = SHA1_DIGEST_LENGTH;
1058 		}
1059 
1060 		/* Write packfile data to temporary pack file. */
1061 		w = write(packfd, buf, r);
1062 		if (w == -1) {
1063 			err = got_error_from_errno("write");
1064 			goto done;
1065 		}
1066 		if (w != r) {
1067 			err = got_error(GOT_ERR_IO);
1068 			goto done;
1069 		}
1070 		packsz += w;
1071 
1072 		/* Don't send too many progress privsep messages. */
1073 		if (packsz > last_reported_packsz + 1024) {
1074 			err = send_fetch_download_progress(ibuf, packsz);
1075 			if (err)
1076 				goto done;
1077 			last_reported_packsz = packsz;
1078 		}
1079 	}
1080 	err = send_fetch_download_progress(ibuf, packsz);
1081 	if (err)
1082 		goto done;
1083 
1084 	SHA1Final(pack_sha1, &sha1_ctx);
1085 	if (sha1_buf_len != SHA1_DIGEST_LENGTH ||
1086 	    memcmp(pack_sha1, sha1_buf, sha1_buf_len) != 0) {
1087 		err = got_error_msg(GOT_ERR_BAD_PACKFILE,
1088 		    "pack file checksum mismatch");
1089 	}
1090 done:
1091 	TAILQ_FOREACH(pe, &symrefs, entry) {
1092 		free((void *)pe->path);
1093 		free(pe->data);
1094 	}
1095 	got_pathlist_free(&symrefs);
1096 	free(have);
1097 	free(want);
1098 	free(id_str);
1099 	free(refname);
1100 	free(server_capabilities);
1101 	return err;
1102 }
1103 
1104 
1105 int
1106 main(int argc, char **argv)
1107 {
1108 	const struct got_error *err = NULL;
1109 	int fetchfd, packfd = -1, i;
1110 	uint8_t pack_sha1[SHA1_DIGEST_LENGTH];
1111 	struct imsgbuf ibuf;
1112 	struct imsg imsg;
1113 	struct got_pathlist_head have_refs;
1114 	struct got_pathlist_head wanted_branches;
1115 	struct got_pathlist_head wanted_refs;
1116 	struct got_pathlist_entry *pe;
1117 	struct got_imsg_fetch_request fetch_req;
1118 	struct got_imsg_fetch_have_ref href;
1119 	struct got_imsg_fetch_wanted_branch wbranch;
1120 	struct got_imsg_fetch_wanted_ref wref;
1121 	size_t datalen;
1122 #if 0
1123 	static int attached;
1124 	while (!attached)
1125 		sleep (1);
1126 #endif
1127 
1128 	TAILQ_INIT(&have_refs);
1129 	TAILQ_INIT(&wanted_branches);
1130 	TAILQ_INIT(&wanted_refs);
1131 
1132 	imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
1133 #ifndef PROFILE
1134 	/* revoke access to most system calls */
1135 	if (pledge("stdio recvfd", NULL) == -1) {
1136 		err = got_error_from_errno("pledge");
1137 		got_privsep_send_error(&ibuf, err);
1138 		return 1;
1139 	}
1140 #endif
1141 	if ((err = got_privsep_recv_imsg(&imsg, &ibuf, 0)) != 0) {
1142 		if (err->code == GOT_ERR_PRIVSEP_PIPE)
1143 			err = NULL;
1144 		goto done;
1145 	}
1146 	if (imsg.hdr.type == GOT_IMSG_STOP)
1147 		goto done;
1148 	if (imsg.hdr.type != GOT_IMSG_FETCH_REQUEST) {
1149 		err = got_error(GOT_ERR_PRIVSEP_MSG);
1150 		goto done;
1151 	}
1152 	datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
1153 	if (datalen < sizeof(fetch_req)) {
1154 		err = got_error(GOT_ERR_PRIVSEP_LEN);
1155 		goto done;
1156 	}
1157 	memcpy(&fetch_req, imsg.data, sizeof(fetch_req));
1158 	fetchfd = imsg.fd;
1159 	imsg_free(&imsg);
1160 
1161 	if (fetch_req.verbosity > 0)
1162 		chattygot += fetch_req.verbosity;
1163 
1164 	for (i = 0; i < fetch_req.n_have_refs; i++) {
1165 		struct got_object_id *id;
1166 		char *refname;
1167 
1168 		if ((err = got_privsep_recv_imsg(&imsg, &ibuf, 0)) != 0) {
1169 			if (err->code == GOT_ERR_PRIVSEP_PIPE)
1170 				err = NULL;
1171 			goto done;
1172 		}
1173 		if (imsg.hdr.type == GOT_IMSG_STOP)
1174 			goto done;
1175 		if (imsg.hdr.type != GOT_IMSG_FETCH_HAVE_REF) {
1176 			err = got_error(GOT_ERR_PRIVSEP_MSG);
1177 			goto done;
1178 		}
1179 		datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
1180 		if (datalen < sizeof(href)) {
1181 			err = got_error(GOT_ERR_PRIVSEP_LEN);
1182 			goto done;
1183 		}
1184 		memcpy(&href, imsg.data, sizeof(href));
1185 		if (datalen - sizeof(href) < href.name_len) {
1186 			err = got_error(GOT_ERR_PRIVSEP_LEN);
1187 			goto done;
1188 		}
1189 		refname = malloc(href.name_len + 1);
1190 		if (refname == NULL) {
1191 			err = got_error_from_errno("malloc");
1192 			goto done;
1193 		}
1194 		memcpy(refname, imsg.data + sizeof(href), href.name_len);
1195 		refname[href.name_len] = '\0';
1196 
1197 		id = malloc(sizeof(*id));
1198 		if (id == NULL) {
1199 			free(refname);
1200 			err = got_error_from_errno("malloc");
1201 			goto done;
1202 		}
1203 		memcpy(id->sha1, href.id, SHA1_DIGEST_LENGTH);
1204 		err = got_pathlist_append(&have_refs, refname, id);
1205 		if (err) {
1206 			free(refname);
1207 			free(id);
1208 			goto done;
1209 		}
1210 
1211 		imsg_free(&imsg);
1212 	}
1213 
1214 	for (i = 0; i < fetch_req.n_wanted_branches; i++) {
1215 		char *refname;
1216 
1217 		if ((err = got_privsep_recv_imsg(&imsg, &ibuf, 0)) != 0) {
1218 			if (err->code == GOT_ERR_PRIVSEP_PIPE)
1219 				err = NULL;
1220 			goto done;
1221 		}
1222 		if (imsg.hdr.type == GOT_IMSG_STOP)
1223 			goto done;
1224 		if (imsg.hdr.type != GOT_IMSG_FETCH_WANTED_BRANCH) {
1225 			err = got_error(GOT_ERR_PRIVSEP_MSG);
1226 			goto done;
1227 		}
1228 		datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
1229 		if (datalen < sizeof(wbranch)) {
1230 			err = got_error(GOT_ERR_PRIVSEP_LEN);
1231 			goto done;
1232 		}
1233 		memcpy(&wbranch, imsg.data, sizeof(wbranch));
1234 		if (datalen - sizeof(wbranch) < wbranch.name_len) {
1235 			err = got_error(GOT_ERR_PRIVSEP_LEN);
1236 			goto done;
1237 		}
1238 		refname = malloc(wbranch.name_len + 1);
1239 		if (refname == NULL) {
1240 			err = got_error_from_errno("malloc");
1241 			goto done;
1242 		}
1243 		memcpy(refname, imsg.data + sizeof(wbranch), wbranch.name_len);
1244 		refname[wbranch.name_len] = '\0';
1245 
1246 		err = got_pathlist_append(&wanted_branches, refname, NULL);
1247 		if (err) {
1248 			free(refname);
1249 			goto done;
1250 		}
1251 
1252 		imsg_free(&imsg);
1253 	}
1254 
1255 	for (i = 0; i < fetch_req.n_wanted_refs; i++) {
1256 		char *refname;
1257 
1258 		if ((err = got_privsep_recv_imsg(&imsg, &ibuf, 0)) != 0) {
1259 			if (err->code == GOT_ERR_PRIVSEP_PIPE)
1260 				err = NULL;
1261 			goto done;
1262 		}
1263 		if (imsg.hdr.type == GOT_IMSG_STOP)
1264 			goto done;
1265 		if (imsg.hdr.type != GOT_IMSG_FETCH_WANTED_REF) {
1266 			err = got_error(GOT_ERR_PRIVSEP_MSG);
1267 			goto done;
1268 		}
1269 		datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
1270 		if (datalen < sizeof(wref)) {
1271 			err = got_error(GOT_ERR_PRIVSEP_LEN);
1272 			goto done;
1273 		}
1274 		memcpy(&wref, imsg.data, sizeof(wref));
1275 		if (datalen - sizeof(wref) < wref.name_len) {
1276 			err = got_error(GOT_ERR_PRIVSEP_LEN);
1277 			goto done;
1278 		}
1279 		refname = malloc(wref.name_len + 1);
1280 		if (refname == NULL) {
1281 			err = got_error_from_errno("malloc");
1282 			goto done;
1283 		}
1284 		memcpy(refname, imsg.data + sizeof(wref), wref.name_len);
1285 		refname[wref.name_len] = '\0';
1286 
1287 		err = got_pathlist_append(&wanted_refs, refname, NULL);
1288 		if (err) {
1289 			free(refname);
1290 			goto done;
1291 		}
1292 
1293 		imsg_free(&imsg);
1294 	}
1295 
1296 	if ((err = got_privsep_recv_imsg(&imsg, &ibuf, 0)) != 0) {
1297 		if (err->code == GOT_ERR_PRIVSEP_PIPE)
1298 			err = NULL;
1299 		goto done;
1300 	}
1301 	if (imsg.hdr.type == GOT_IMSG_STOP)
1302 		goto done;
1303 	if (imsg.hdr.type != GOT_IMSG_FETCH_OUTFD) {
1304 		err = got_error(GOT_ERR_PRIVSEP_MSG);
1305 		goto done;
1306 	}
1307 	if (imsg.hdr.len - IMSG_HEADER_SIZE != 0) {
1308 		err = got_error(GOT_ERR_PRIVSEP_LEN);
1309 		goto done;
1310 	}
1311 	packfd = imsg.fd;
1312 
1313 	err = fetch_pack(fetchfd, packfd, pack_sha1, &have_refs,
1314 	    fetch_req.fetch_all_branches, &wanted_branches,
1315 	    &wanted_refs, fetch_req.list_refs_only, &ibuf);
1316 done:
1317 	TAILQ_FOREACH(pe, &have_refs, entry) {
1318 		free((char *)pe->path);
1319 		free(pe->data);
1320 	}
1321 	got_pathlist_free(&have_refs);
1322 	TAILQ_FOREACH(pe, &wanted_branches, entry)
1323 		free((char *)pe->path);
1324 	got_pathlist_free(&wanted_branches);
1325 	if (fetchfd != -1 && close(fetchfd) == -1 && err == NULL)
1326 		err = got_error_from_errno("close");
1327 	if (packfd != -1 && close(packfd) == -1 && err == NULL)
1328 		err = got_error_from_errno("close");
1329 	if (err != NULL)
1330 		got_privsep_send_error(&ibuf, err);
1331 	else
1332 		err = send_fetch_done(&ibuf, pack_sha1);
1333 	if (err != NULL) {
1334 		fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
1335 		got_privsep_send_error(&ibuf, err);
1336 	}
1337 
1338 	exit(0);
1339 }