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>
19 #include <sys/queue.h>
22 #include <sys/socket.h>
24 #include <sys/resource.h>
25 #include <sys/socket.h>
44 #include "got_error.h"
45 #include "got_reference.h"
46 #include "got_repository.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"
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 #include "got_lib_dial.h"
65 #include "got_lib_pkt.h"
68 #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
72 #define ssizeof(_x) ((ssize_t)(sizeof(_x)))
76 #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
79 const struct got_error *
80 got_fetch_connect(pid_t *fetchpid, int *fetchfd, const char *proto,
81 const char *host, const char *port, const char *server_path, int verbosity)
83 const struct got_error *err = NULL;
88 if (strcmp(proto, "ssh") == 0 || strcmp(proto, "git+ssh") == 0)
89 err = got_dial_ssh(fetchpid, fetchfd, host, port,
90 server_path, GOT_DIAL_DIRECTION_FETCH, verbosity);
91 else if (strcmp(proto, "git") == 0)
92 err = got_dial_git(fetchfd, host, port, server_path,
93 GOT_DIAL_DIRECTION_FETCH);
94 else if (strcmp(proto, "http") == 0 || strcmp(proto, "git+http") == 0)
95 err = got_error_path(proto, GOT_ERR_NOT_IMPL);
97 err = got_error_path(proto, GOT_ERR_BAD_PROTO);
101 const struct got_error *
102 got_fetch_pack(struct got_object_id **pack_hash, struct got_pathlist_head *refs,
103 struct got_pathlist_head *symrefs, const char *remote_name,
104 int mirror_references, int fetch_all_branches,
105 struct got_pathlist_head *wanted_branches,
106 struct got_pathlist_head *wanted_refs, int list_refs_only, int verbosity,
107 int fetchfd, struct got_repository *repo,
108 got_fetch_progress_cb progress_cb, void *progress_arg)
111 int imsg_fetchfds[2], imsg_idxfds[2];
112 int packfd = -1, npackfd = -1, idxfd = -1, nidxfd = -1, nfetchfd = -1;
114 int fetchstatus, idxstatus, done = 0;
115 const struct got_error *err;
116 struct imsgbuf fetchibuf, idxibuf;
117 pid_t fetchpid, idxpid;
118 char *tmppackpath = NULL, *tmpidxpath = NULL;
119 char *packpath = NULL, *idxpath = NULL, *id_str = NULL;
120 const char *repo_path = NULL;
121 struct got_pathlist_head have_refs;
122 struct got_pathlist_entry *pe;
123 struct got_reflist_head my_refs;
124 struct got_reflist_entry *re;
125 off_t packfile_size = 0;
126 struct got_packfile_hdr pack_hdr;
129 char *progress = NULL;
134 * Prevent fetching of references that won't make any
135 * sense outside of the remote repository's context.
137 TAILQ_FOREACH(pe, wanted_refs, entry) {
138 const char *refname = pe->path;
139 if (strncmp(refname, "refs/got/", 9) == 0 ||
140 strncmp(refname, "got/", 4) == 0 ||
141 strncmp(refname, "refs/remotes/", 13) == 0 ||
142 strncmp(refname, "remotes/", 8) == 0)
143 return got_error_path(refname, GOT_ERR_FETCH_BAD_REF);
147 repo_path = got_repo_get_path_git_dir(repo);
149 for (i = 0; i < nitems(tmpfds); i++)
152 TAILQ_INIT(&have_refs);
153 TAILQ_INIT(&my_refs);
155 if (!list_refs_only) {
156 err = got_ref_list(&my_refs, repo, NULL,
157 got_ref_cmp_by_name, NULL);
162 TAILQ_FOREACH(re, &my_refs, entry) {
163 struct got_object_id *id;
166 if (got_ref_is_symbolic(re->ref))
169 err = got_ref_resolve(&id, repo, re->ref);
172 refname = strdup(got_ref_get_name(re->ref));
173 if (refname == NULL) {
174 err = got_error_from_errno("strdup");
177 err = got_pathlist_append(&have_refs, refname, id);
182 if (list_refs_only) {
183 packfd = got_opentempfd();
185 err = got_error_from_errno("got_opentempfd");
189 if (asprintf(&path, "%s/%s/fetching.pack",
190 repo_path, GOT_OBJECTS_PACK_DIR) == -1) {
191 err = got_error_from_errno("asprintf");
194 err = got_opentemp_named_fd(&tmppackpath, &packfd, path);
198 if (fchmod(packfd, GOT_DEFAULT_FILE_MODE) != 0) {
199 err = got_error_from_errno2("fchmod", tmppackpath);
203 if (list_refs_only) {
204 idxfd = got_opentempfd();
206 err = got_error_from_errno("got_opentempfd");
210 if (asprintf(&path, "%s/%s/fetching.idx",
211 repo_path, GOT_OBJECTS_PACK_DIR) == -1) {
212 err = got_error_from_errno("asprintf");
215 err = got_opentemp_named_fd(&tmpidxpath, &idxfd, path);
219 if (fchmod(idxfd, GOT_DEFAULT_FILE_MODE) != 0) {
220 err = got_error_from_errno2("fchmod", tmpidxpath);
226 err = got_error_from_errno("dup");
230 for (i = 0; i < nitems(tmpfds); i++) {
231 tmpfds[i] = got_opentempfd();
232 if (tmpfds[i] == -1) {
233 err = got_error_from_errno("got_opentempfd");
238 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fetchfds) == -1) {
239 err = got_error_from_errno("socketpair");
244 if (fetchpid == -1) {
245 err = got_error_from_errno("fork");
247 } else if (fetchpid == 0){
248 got_privsep_exec_child(imsg_fetchfds,
249 GOT_PATH_PROG_FETCH_PACK, tmppackpath);
252 if (close(imsg_fetchfds[1]) == -1) {
253 err = got_error_from_errno("close");
256 imsg_init(&fetchibuf, imsg_fetchfds[0]);
257 nfetchfd = dup(fetchfd);
258 if (nfetchfd == -1) {
259 err = got_error_from_errno("dup");
262 err = got_privsep_send_fetch_req(&fetchibuf, nfetchfd, &have_refs,
263 fetch_all_branches, wanted_branches, wanted_refs,
264 list_refs_only, verbosity);
268 npackfd = dup(packfd);
270 err = got_error_from_errno("dup");
273 err = got_privsep_send_fetch_outfd(&fetchibuf, npackfd);
279 progress = calloc(GOT_PKT_MAX, 1);
280 if (progress == NULL) {
281 err = got_error_from_errno("calloc");
285 *pack_hash = calloc(1, sizeof(**pack_hash));
286 if (*pack_hash == NULL) {
287 err = got_error_from_errno("calloc");
292 struct got_object_id *id = NULL;
293 char *refname = NULL;
294 char *server_progress = NULL;
295 off_t packfile_size_cur = 0;
297 err = got_privsep_recv_fetch_progress(&done,
298 &id, &refname, symrefs, &server_progress,
299 &packfile_size_cur, (*pack_hash)->sha1, &fetchibuf);
302 /* Don't report size progress for an empty pack file. */
303 if (packfile_size_cur <= ssizeof(pack_hdr) + SHA1_DIGEST_LENGTH)
304 packfile_size_cur = 0;
305 if (!done && refname && id) {
306 err = got_pathlist_insert(NULL, refs, refname, id);
309 } else if (!done && server_progress) {
312 * XXX git-daemon tends to send batched output with
313 * lines spanning separate packets. Buffer progress
314 * output until we see a CR or LF to avoid giving
315 * partial lines of progress output to the callback.
317 if (strlcat(progress, server_progress,
318 GOT_PKT_MAX) >= GOT_PKT_MAX) {
319 progress[0] = '\0'; /* discard */
322 while ((p = strchr(progress, '\r')) != NULL ||
323 (p = strchr(progress, '\n')) != NULL) {
328 if (asprintf(&s, "%s%s", progress,
329 c == '\n' ? "\n" : "") == -1) {
330 err = got_error_from_errno("asprintf");
333 err = progress_cb(progress_arg, s,
334 packfile_size_cur, 0, 0, 0, 0);
338 n = strlen(progress);
339 if (n < GOT_PKT_MAX - 1) {
340 memmove(progress, &progress[n + 1],
341 GOT_PKT_MAX - n - 1);
345 free(server_progress);
348 } else if (!done && packfile_size_cur != packfile_size) {
349 err = progress_cb(progress_arg, NULL,
350 packfile_size_cur, 0, 0, 0, 0);
353 packfile_size = packfile_size_cur;
356 if (waitpid(fetchpid, &fetchstatus, 0) == -1) {
357 err = got_error_from_errno("waitpid");
361 if (lseek(packfd, 0, SEEK_SET) == -1) {
362 err = got_error_from_errno("lseek");
366 /* If zero data was fetched without error we are already up-to-date. */
367 if (packfile_size == 0) {
371 } else if (packfile_size < ssizeof(pack_hdr) + SHA1_DIGEST_LENGTH) {
372 err = got_error_msg(GOT_ERR_BAD_PACKFILE, "short pack file");
377 n = read(packfd, &pack_hdr, ssizeof(pack_hdr));
379 err = got_error_from_errno("read");
382 if (n != ssizeof(pack_hdr)) {
383 err = got_error(GOT_ERR_IO);
386 if (pack_hdr.signature != htobe32(GOT_PACKFILE_SIGNATURE)) {
387 err = got_error_msg(GOT_ERR_BAD_PACKFILE,
388 "bad pack file signature");
391 if (pack_hdr.version != htobe32(GOT_PACKFILE_VERSION)) {
392 err = got_error_msg(GOT_ERR_BAD_PACKFILE,
393 "bad pack file version");
396 nobj = be32toh(pack_hdr.nobjects);
398 packfile_size > ssizeof(pack_hdr) + SHA1_DIGEST_LENGTH)
399 return got_error_msg(GOT_ERR_BAD_PACKFILE,
400 "bad pack file with zero objects");
402 packfile_size <= ssizeof(pack_hdr) + SHA1_DIGEST_LENGTH)
403 return got_error_msg(GOT_ERR_BAD_PACKFILE,
404 "empty pack file with non-zero object count");
408 * If the pack file contains no objects, we may only need to update
409 * references in our repository. The caller will take care of that.
417 if (lseek(packfd, 0, SEEK_SET) == -1) {
418 err = got_error_from_errno("lseek");
422 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_idxfds) == -1) {
423 err = got_error_from_errno("socketpair");
428 err= got_error_from_errno("fork");
430 } else if (idxpid == 0)
431 got_privsep_exec_child(imsg_idxfds,
432 GOT_PATH_PROG_INDEX_PACK, tmppackpath);
433 if (close(imsg_idxfds[1]) == -1) {
434 err = got_error_from_errno("close");
437 imsg_init(&idxibuf, imsg_idxfds[0]);
439 npackfd = dup(packfd);
441 err = got_error_from_errno("dup");
444 err = got_privsep_send_index_pack_req(&idxibuf, (*pack_hash)->sha1,
449 err = got_privsep_send_index_pack_outfd(&idxibuf, nidxfd);
453 for (i = 0; i < nitems(tmpfds); i++) {
454 err = got_privsep_send_tmpfd(&idxibuf, tmpfds[i]);
461 int nobj_total, nobj_indexed, nobj_loose, nobj_resolved;
463 err = got_privsep_recv_index_progress(&done, &nobj_total,
464 &nobj_indexed, &nobj_loose, &nobj_resolved,
468 if (nobj_indexed != 0) {
469 err = progress_cb(progress_arg, NULL,
470 packfile_size, nobj_total,
471 nobj_indexed, nobj_loose, nobj_resolved);
475 imsg_clear(&idxibuf);
477 if (close(imsg_idxfds[0]) == -1) {
478 err = got_error_from_errno("close");
481 if (waitpid(idxpid, &idxstatus, 0) == -1) {
482 err = got_error_from_errno("waitpid");
486 err = got_object_id_str(&id_str, *pack_hash);
489 if (asprintf(&packpath, "%s/%s/pack-%s.pack",
490 repo_path, GOT_OBJECTS_PACK_DIR, id_str) == -1) {
491 err = got_error_from_errno("asprintf");
495 if (asprintf(&idxpath, "%s/%s/pack-%s.idx",
496 repo_path, GOT_OBJECTS_PACK_DIR, id_str) == -1) {
497 err = got_error_from_errno("asprintf");
501 if (rename(tmppackpath, packpath) == -1) {
502 err = got_error_from_errno3("rename", tmppackpath, packpath);
507 if (rename(tmpidxpath, idxpath) == -1) {
508 err = got_error_from_errno3("rename", tmpidxpath, idxpath);
515 if (tmppackpath && unlink(tmppackpath) == -1 && err == NULL)
516 err = got_error_from_errno2("unlink", tmppackpath);
517 if (tmpidxpath && unlink(tmpidxpath) == -1 && err == NULL)
518 err = got_error_from_errno2("unlink", tmpidxpath);
519 if (nfetchfd != -1 && close(nfetchfd) == -1 && err == NULL)
520 err = got_error_from_errno("close");
521 if (npackfd != -1 && close(npackfd) == -1 && err == NULL)
522 err = got_error_from_errno("close");
523 if (packfd != -1 && close(packfd) == -1 && err == NULL)
524 err = got_error_from_errno("close");
525 if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
526 err = got_error_from_errno("close");
527 for (i = 0; i < nitems(tmpfds); i++) {
528 if (tmpfds[i] != -1 && close(tmpfds[i]) == -1 && err == NULL)
529 err = got_error_from_errno("close");
537 TAILQ_FOREACH(pe, &have_refs, entry) {
538 free((char *)pe->path);
541 got_pathlist_free(&have_refs);
542 got_ref_list_free(&my_refs);
546 TAILQ_FOREACH(pe, refs, entry) {
547 free((void *)pe->path);
550 got_pathlist_free(refs);
551 TAILQ_FOREACH(pe, symrefs, entry) {
552 free((void *)pe->path);
555 got_pathlist_free(symrefs);