2 * Copyright (c) 2018, 2019 Ori Bernstein <ori@openbsd.org>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include <sys/types.h>
20 #include <sys/socket.h>
22 #include <sys/resource.h>
23 #include <sys/socket.h>
41 #include "got_error.h"
42 #include "got_reference.h"
43 #include "got_repository.h"
45 #include "got_cancel.h"
46 #include "got_worktree.h"
47 #include "got_object.h"
48 #include "got_opentemp.h"
49 #include "got_fetch.h"
51 #include "got_lib_delta.h"
52 #include "got_lib_inflate.h"
53 #include "got_lib_object.h"
54 #include "got_lib_object_parse.h"
55 #include "got_lib_object_create.h"
56 #include "got_lib_pack.h"
57 #include "got_lib_sha1.h"
58 #include "got_lib_privsep.h"
59 #include "got_lib_object_cache.h"
60 #include "got_lib_repository.h"
61 #include "got_lib_dial.h"
62 #include "got_lib_pkt.h"
65 #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
69 #define ssizeof(_x) ((ssize_t)(sizeof(_x)))
73 #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
76 const struct got_error *
77 got_fetch_connect(pid_t *fetchpid, int *fetchfd, const char *proto,
78 const char *host, const char *port, const char *server_path, int verbosity)
80 const struct got_error *err = NULL;
85 if (strcmp(proto, "ssh") == 0 || strcmp(proto, "git+ssh") == 0)
86 err = got_dial_ssh(fetchpid, fetchfd, host, port,
87 server_path, GOT_DIAL_DIRECTION_FETCH, verbosity);
88 else if (strcmp(proto, "git") == 0)
89 err = got_dial_git(fetchfd, host, port, server_path,
90 GOT_DIAL_DIRECTION_FETCH);
91 else if (strcmp(proto, "http") == 0 || strcmp(proto, "git+http") == 0)
92 err = got_error_path(proto, GOT_ERR_NOT_IMPL);
94 err = got_error_path(proto, GOT_ERR_BAD_PROTO);
98 const struct got_error*
99 got_fetch_pack(struct got_object_id **pack_hash, struct got_pathlist_head *refs,
100 struct got_pathlist_head *symrefs, const char *remote_name,
101 int mirror_references, int fetch_all_branches,
102 struct got_pathlist_head *wanted_branches,
103 struct got_pathlist_head *wanted_refs, int list_refs_only, int verbosity,
104 int fetchfd, struct got_repository *repo,
105 got_fetch_progress_cb progress_cb, void *progress_arg)
108 int imsg_fetchfds[2], imsg_idxfds[2];
109 int packfd = -1, npackfd = -1, idxfd = -1, nidxfd = -1, nfetchfd = -1;
111 int fetchstatus, idxstatus, done = 0;
112 const struct got_error *err;
113 struct imsgbuf fetchibuf, idxibuf;
114 pid_t fetchpid, idxpid;
115 char *tmppackpath = NULL, *tmpidxpath = NULL;
116 char *packpath = NULL, *idxpath = NULL, *id_str = NULL;
117 const char *repo_path = NULL;
118 struct got_pathlist_head have_refs;
119 struct got_pathlist_entry *pe;
120 struct got_reflist_head my_refs;
121 struct got_reflist_entry *re;
122 off_t packfile_size = 0;
123 struct got_packfile_hdr pack_hdr;
125 char *ref_prefix = NULL;
126 size_t ref_prefixlen = 0;
128 char *progress = NULL;
133 * Prevent fetching of references that won't make any
134 * sense outside of the remote repository's context.
136 TAILQ_FOREACH(pe, wanted_refs, entry) {
137 const char *refname = pe->path;
138 if (strncmp(refname, "refs/got/", 9) == 0 ||
139 strncmp(refname, "got/", 4) == 0 ||
140 strncmp(refname, "refs/remotes/", 13) == 0 ||
141 strncmp(refname, "remotes/", 8) == 0)
142 return got_error_path(refname, GOT_ERR_FETCH_BAD_REF);
146 repo_path = got_repo_get_path_git_dir(repo);
148 for (i = 0; i < nitems(tmpfds); i++)
151 TAILQ_INIT(&have_refs);
152 TAILQ_INIT(&my_refs);
154 if (!mirror_references) {
155 if (asprintf(&ref_prefix, "refs/remotes/%s/",
157 return got_error_from_errno("asprintf");
158 ref_prefixlen = strlen(ref_prefix);
161 if (!list_refs_only) {
162 err = got_ref_list(&my_refs, repo, NULL,
163 got_ref_cmp_by_name, NULL);
168 TAILQ_FOREACH(re, &my_refs, entry) {
169 struct got_object_id *id;
172 if (got_ref_is_symbolic(re->ref))
175 refname = got_ref_get_name(re->ref);
177 if (mirror_references) {
179 err = got_ref_resolve(&id, repo, re->ref);
182 name = strdup(refname);
184 err = got_error_from_errno("strdup");
187 err = got_pathlist_append(&have_refs, name, id);
193 if (strncmp("refs/tags/", refname, 10) == 0) {
196 err = got_ref_resolve(&id, repo, re->ref);
199 tagname = strdup(refname);
200 if (tagname == NULL) {
201 err = got_error_from_errno("strdup");
204 err = got_pathlist_append(&have_refs, tagname, id);
211 if (strncmp(ref_prefix, refname, ref_prefixlen) == 0) {
214 err = got_ref_resolve(&id, repo, re->ref);
218 if (asprintf(&branchname, "refs/heads/%s",
219 refname + ref_prefixlen) == -1) {
220 err = got_error_from_errno("asprintf");
223 err = got_pathlist_append(&have_refs, branchname, id);
231 if (list_refs_only) {
232 packfd = got_opentempfd();
234 err = got_error_from_errno("got_opentempfd");
238 if (asprintf(&path, "%s/%s/fetching.pack",
239 repo_path, GOT_OBJECTS_PACK_DIR) == -1) {
240 err = got_error_from_errno("asprintf");
243 err = got_opentemp_named_fd(&tmppackpath, &packfd, path);
247 if (fchmod(packfd, GOT_DEFAULT_FILE_MODE) != 0) {
248 err = got_error_from_errno2("fchmod", tmppackpath);
252 if (list_refs_only) {
253 idxfd = got_opentempfd();
255 err = got_error_from_errno("got_opentempfd");
259 if (asprintf(&path, "%s/%s/fetching.idx",
260 repo_path, GOT_OBJECTS_PACK_DIR) == -1) {
261 err = got_error_from_errno("asprintf");
264 err = got_opentemp_named_fd(&tmpidxpath, &idxfd, path);
268 if (fchmod(idxfd, GOT_DEFAULT_FILE_MODE) != 0) {
269 err = got_error_from_errno2("fchmod", tmpidxpath);
275 err = got_error_from_errno("dup");
279 for (i = 0; i < nitems(tmpfds); i++) {
280 tmpfds[i] = got_opentempfd();
281 if (tmpfds[i] == -1) {
282 err = got_error_from_errno("got_opentempfd");
287 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fetchfds) == -1) {
288 err = got_error_from_errno("socketpair");
293 if (fetchpid == -1) {
294 err = got_error_from_errno("fork");
296 } else if (fetchpid == 0){
297 got_privsep_exec_child(imsg_fetchfds,
298 GOT_PATH_PROG_FETCH_PACK, tmppackpath);
301 if (close(imsg_fetchfds[1]) == -1) {
302 err = got_error_from_errno("close");
305 imsg_init(&fetchibuf, imsg_fetchfds[0]);
306 nfetchfd = dup(fetchfd);
307 if (nfetchfd == -1) {
308 err = got_error_from_errno("dup");
311 err = got_privsep_send_fetch_req(&fetchibuf, nfetchfd, &have_refs,
312 fetch_all_branches, wanted_branches, wanted_refs,
313 list_refs_only, verbosity);
317 npackfd = dup(packfd);
319 err = got_error_from_errno("dup");
322 err = got_privsep_send_fetch_outfd(&fetchibuf, npackfd);
328 progress = calloc(GOT_PKT_MAX, 1);
329 if (progress == NULL) {
330 err = got_error_from_errno("calloc");
334 *pack_hash = calloc(1, sizeof(**pack_hash));
335 if (*pack_hash == NULL) {
336 err = got_error_from_errno("calloc");
341 struct got_object_id *id = NULL;
342 char *refname = NULL;
343 char *server_progress = NULL;
344 off_t packfile_size_cur = 0;
346 err = got_privsep_recv_fetch_progress(&done,
347 &id, &refname, symrefs, &server_progress,
348 &packfile_size_cur, (*pack_hash)->sha1, &fetchibuf);
351 if (!done && refname && id) {
352 err = got_pathlist_insert(NULL, refs, refname, id);
355 } else if (!done && server_progress) {
358 * XXX git-daemon tends to send batched output with
359 * lines spanning separate packets. Buffer progress
360 * output until we see a CR or LF to avoid giving
361 * partial lines of progress output to the callback.
363 if (strlcat(progress, server_progress,
364 GOT_PKT_MAX) >= GOT_PKT_MAX) {
365 progress[0] = '\0'; /* discard */
368 while ((p = strchr(progress, '\r')) != NULL ||
369 (p = strchr(progress, '\n')) != NULL) {
374 if (asprintf(&s, "%s%s", progress,
375 c == '\n' ? "\n" : "") == -1) {
376 err = got_error_from_errno("asprintf");
379 err = progress_cb(progress_arg, s,
380 packfile_size_cur, 0, 0, 0, 0);
384 n = strlen(progress);
385 if (n < GOT_PKT_MAX - 1) {
386 memmove(progress, &progress[n + 1],
387 GOT_PKT_MAX - n - 1);
391 free(server_progress);
394 } else if (!done && packfile_size_cur != packfile_size) {
395 err = progress_cb(progress_arg, NULL,
396 packfile_size_cur, 0, 0, 0, 0);
399 packfile_size = packfile_size_cur;
402 if (waitpid(fetchpid, &fetchstatus, 0) == -1) {
403 err = got_error_from_errno("waitpid");
407 if (lseek(packfd, 0, SEEK_SET) == -1) {
408 err = got_error_from_errno("lseek");
412 /* If zero data was fetched without error we are already up-to-date. */
413 if (packfile_size == 0) {
417 } else if (packfile_size < ssizeof(pack_hdr) + SHA1_DIGEST_LENGTH) {
418 err = got_error_msg(GOT_ERR_BAD_PACKFILE, "short pack file");
423 n = read(packfd, &pack_hdr, ssizeof(pack_hdr));
425 err = got_error_from_errno("read");
428 if (n != ssizeof(pack_hdr)) {
429 err = got_error(GOT_ERR_IO);
432 if (pack_hdr.signature != htobe32(GOT_PACKFILE_SIGNATURE)) {
433 err = got_error_msg(GOT_ERR_BAD_PACKFILE,
434 "bad pack file signature");
437 if (pack_hdr.version != htobe32(GOT_PACKFILE_VERSION)) {
438 err = got_error_msg(GOT_ERR_BAD_PACKFILE,
439 "bad pack file version");
442 nobj = be32toh(pack_hdr.nobjects);
444 packfile_size > ssizeof(pack_hdr) + SHA1_DIGEST_LENGTH)
445 return got_error_msg(GOT_ERR_BAD_PACKFILE,
446 "bad pack file with zero objects");
448 packfile_size <= ssizeof(pack_hdr) + SHA1_DIGEST_LENGTH)
449 return got_error_msg(GOT_ERR_BAD_PACKFILE,
450 "empty pack file with non-zero object count");
454 * If the pack file contains no objects, we may only need to update
455 * references in our repository. The caller will take care of that.
460 if (lseek(packfd, 0, SEEK_SET) == -1) {
461 err = got_error_from_errno("lseek");
465 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_idxfds) == -1) {
466 err = got_error_from_errno("socketpair");
471 err= got_error_from_errno("fork");
473 } else if (idxpid == 0)
474 got_privsep_exec_child(imsg_idxfds,
475 GOT_PATH_PROG_INDEX_PACK, tmppackpath);
476 if (close(imsg_idxfds[1]) == -1) {
477 err = got_error_from_errno("close");
480 imsg_init(&idxibuf, imsg_idxfds[0]);
482 npackfd = dup(packfd);
484 err = got_error_from_errno("dup");
487 err = got_privsep_send_index_pack_req(&idxibuf, (*pack_hash)->sha1,
492 err = got_privsep_send_index_pack_outfd(&idxibuf, nidxfd);
496 for (i = 0; i < nitems(tmpfds); i++) {
497 err = got_privsep_send_tmpfd(&idxibuf, tmpfds[i]);
504 int nobj_total, nobj_indexed, nobj_loose, nobj_resolved;
506 err = got_privsep_recv_index_progress(&done, &nobj_total,
507 &nobj_indexed, &nobj_loose, &nobj_resolved,
511 if (nobj_indexed != 0) {
512 err = progress_cb(progress_arg, NULL,
513 packfile_size, nobj_total,
514 nobj_indexed, nobj_loose, nobj_resolved);
518 imsg_clear(&idxibuf);
520 if (close(imsg_idxfds[0]) == -1) {
521 err = got_error_from_errno("close");
524 if (waitpid(idxpid, &idxstatus, 0) == -1) {
525 err = got_error_from_errno("waitpid");
529 err = got_object_id_str(&id_str, *pack_hash);
532 if (asprintf(&packpath, "%s/%s/pack-%s.pack",
533 repo_path, GOT_OBJECTS_PACK_DIR, id_str) == -1) {
534 err = got_error_from_errno("asprintf");
538 if (asprintf(&idxpath, "%s/%s/pack-%s.idx",
539 repo_path, GOT_OBJECTS_PACK_DIR, id_str) == -1) {
540 err = got_error_from_errno("asprintf");
544 if (rename(tmppackpath, packpath) == -1) {
545 err = got_error_from_errno3("rename", tmppackpath, packpath);
550 if (rename(tmpidxpath, idxpath) == -1) {
551 err = got_error_from_errno3("rename", tmpidxpath, idxpath);
558 if (tmppackpath && unlink(tmppackpath) == -1 && err == NULL)
559 err = got_error_from_errno2("unlink", tmppackpath);
560 if (tmpidxpath && unlink(tmpidxpath) == -1 && err == NULL)
561 err = got_error_from_errno2("unlink", tmpidxpath);
562 if (nfetchfd != -1 && close(nfetchfd) == -1 && err == NULL)
563 err = got_error_from_errno("close");
564 if (npackfd != -1 && close(npackfd) == -1 && err == NULL)
565 err = got_error_from_errno("close");
566 if (packfd != -1 && close(packfd) == -1 && err == NULL)
567 err = got_error_from_errno("close");
568 if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
569 err = got_error_from_errno("close");
570 for (i = 0; i < nitems(tmpfds); i++) {
571 if (tmpfds[i] != -1 && close(tmpfds[i]) == -1 && err == NULL)
572 err = got_error_from_errno("close");
581 TAILQ_FOREACH(pe, &have_refs, entry) {
582 free((char *)pe->path);
585 got_pathlist_free(&have_refs);
586 got_ref_list_free(&my_refs);
590 TAILQ_FOREACH(pe, refs, entry) {
591 free((void *)pe->path);
594 got_pathlist_free(refs);
595 TAILQ_FOREACH(pe, symrefs, entry) {
596 free((void *)pe->path);
599 got_pathlist_free(symrefs);