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1 | #include "git-compat-util.h" | |
2 | #include "cache.h" | |
3 | #include "config.h" | |
4 | #include "pkt-line.h" | |
5 | #include "quote.h" | |
6 | #include "refs.h" | |
7 | #include "run-command.h" | |
8 | #include "remote.h" | |
9 | #include "connect.h" | |
10 | #include "url.h" | |
11 | #include "string-list.h" | |
12 | #include "sha1-array.h" | |
13 | #include "transport.h" | |
14 | #include "strbuf.h" | |
15 | #include "version.h" | |
16 | #include "protocol.h" | |
17 | #include "alias.h" | |
18 | ||
19 | static char *server_capabilities_v1; | |
20 | static struct argv_array server_capabilities_v2 = ARGV_ARRAY_INIT; | |
21 | static const char *parse_feature_value(const char *, const char *, int *); | |
22 | ||
23 | static int check_ref(const char *name, unsigned int flags) | |
24 | { | |
25 | if (!flags) | |
26 | return 1; | |
27 | ||
28 | if (!skip_prefix(name, "refs/", &name)) | |
29 | return 0; | |
30 | ||
31 | /* REF_NORMAL means that we don't want the magic fake tag refs */ | |
32 | if ((flags & REF_NORMAL) && check_refname_format(name, 0)) | |
33 | return 0; | |
34 | ||
35 | /* REF_HEADS means that we want regular branch heads */ | |
36 | if ((flags & REF_HEADS) && starts_with(name, "heads/")) | |
37 | return 1; | |
38 | ||
39 | /* REF_TAGS means that we want tags */ | |
40 | if ((flags & REF_TAGS) && starts_with(name, "tags/")) | |
41 | return 1; | |
42 | ||
43 | /* All type bits clear means that we are ok with anything */ | |
44 | return !(flags & ~REF_NORMAL); | |
45 | } | |
46 | ||
47 | int check_ref_type(const struct ref *ref, int flags) | |
48 | { | |
49 | return check_ref(ref->name, flags); | |
50 | } | |
51 | ||
52 | static NORETURN void die_initial_contact(int unexpected) | |
53 | { | |
54 | /* | |
55 | * A hang-up after seeing some response from the other end | |
56 | * means that it is unexpected, as we know the other end is | |
57 | * willing to talk to us. A hang-up before seeing any | |
58 | * response does not necessarily mean an ACL problem, though. | |
59 | */ | |
60 | if (unexpected) | |
61 | die(_("The remote end hung up upon initial contact")); | |
62 | else | |
63 | die(_("Could not read from remote repository.\n\n" | |
64 | "Please make sure you have the correct access rights\n" | |
65 | "and the repository exists.")); | |
66 | } | |
67 | ||
68 | /* Checks if the server supports the capability 'c' */ | |
69 | int server_supports_v2(const char *c, int die_on_error) | |
70 | { | |
71 | int i; | |
72 | ||
73 | for (i = 0; i < server_capabilities_v2.argc; i++) { | |
74 | const char *out; | |
75 | if (skip_prefix(server_capabilities_v2.argv[i], c, &out) && | |
76 | (!*out || *out == '=')) | |
77 | return 1; | |
78 | } | |
79 | ||
80 | if (die_on_error) | |
81 | die("server doesn't support '%s'", c); | |
82 | ||
83 | return 0; | |
84 | } | |
85 | ||
86 | int server_supports_feature(const char *c, const char *feature, | |
87 | int die_on_error) | |
88 | { | |
89 | int i; | |
90 | ||
91 | for (i = 0; i < server_capabilities_v2.argc; i++) { | |
92 | const char *out; | |
93 | if (skip_prefix(server_capabilities_v2.argv[i], c, &out) && | |
94 | (!*out || *(out++) == '=')) { | |
95 | if (parse_feature_request(out, feature)) | |
96 | return 1; | |
97 | else | |
98 | break; | |
99 | } | |
100 | } | |
101 | ||
102 | if (die_on_error) | |
103 | die("server doesn't support feature '%s'", feature); | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
108 | static void process_capabilities_v2(struct packet_reader *reader) | |
109 | { | |
110 | while (packet_reader_read(reader) == PACKET_READ_NORMAL) | |
111 | argv_array_push(&server_capabilities_v2, reader->line); | |
112 | ||
113 | if (reader->status != PACKET_READ_FLUSH) | |
114 | die("expected flush after capabilities"); | |
115 | } | |
116 | ||
117 | enum protocol_version discover_version(struct packet_reader *reader) | |
118 | { | |
119 | enum protocol_version version = protocol_unknown_version; | |
120 | ||
121 | /* | |
122 | * Peek the first line of the server's response to | |
123 | * determine the protocol version the server is speaking. | |
124 | */ | |
125 | switch (packet_reader_peek(reader)) { | |
126 | case PACKET_READ_EOF: | |
127 | die_initial_contact(0); | |
128 | case PACKET_READ_FLUSH: | |
129 | case PACKET_READ_DELIM: | |
130 | version = protocol_v0; | |
131 | break; | |
132 | case PACKET_READ_NORMAL: | |
133 | version = determine_protocol_version_client(reader->line); | |
134 | break; | |
135 | } | |
136 | ||
137 | switch (version) { | |
138 | case protocol_v2: | |
139 | process_capabilities_v2(reader); | |
140 | break; | |
141 | case protocol_v1: | |
142 | /* Read the peeked version line */ | |
143 | packet_reader_read(reader); | |
144 | break; | |
145 | case protocol_v0: | |
146 | break; | |
147 | case protocol_unknown_version: | |
148 | BUG("unknown protocol version"); | |
149 | } | |
150 | ||
151 | return version; | |
152 | } | |
153 | ||
154 | static void parse_one_symref_info(struct string_list *symref, const char *val, int len) | |
155 | { | |
156 | char *sym, *target; | |
157 | struct string_list_item *item; | |
158 | ||
159 | if (!len) | |
160 | return; /* just "symref" */ | |
161 | /* e.g. "symref=HEAD:refs/heads/master" */ | |
162 | sym = xmemdupz(val, len); | |
163 | target = strchr(sym, ':'); | |
164 | if (!target) | |
165 | /* just "symref=something" */ | |
166 | goto reject; | |
167 | *(target++) = '\0'; | |
168 | if (check_refname_format(sym, REFNAME_ALLOW_ONELEVEL) || | |
169 | check_refname_format(target, REFNAME_ALLOW_ONELEVEL)) | |
170 | /* "symref=bogus:pair */ | |
171 | goto reject; | |
172 | item = string_list_append_nodup(symref, sym); | |
173 | item->util = target; | |
174 | return; | |
175 | reject: | |
176 | free(sym); | |
177 | return; | |
178 | } | |
179 | ||
180 | static void annotate_refs_with_symref_info(struct ref *ref) | |
181 | { | |
182 | struct string_list symref = STRING_LIST_INIT_DUP; | |
183 | const char *feature_list = server_capabilities_v1; | |
184 | ||
185 | while (feature_list) { | |
186 | int len; | |
187 | const char *val; | |
188 | ||
189 | val = parse_feature_value(feature_list, "symref", &len); | |
190 | if (!val) | |
191 | break; | |
192 | parse_one_symref_info(&symref, val, len); | |
193 | feature_list = val + 1; | |
194 | } | |
195 | string_list_sort(&symref); | |
196 | ||
197 | for (; ref; ref = ref->next) { | |
198 | struct string_list_item *item; | |
199 | item = string_list_lookup(&symref, ref->name); | |
200 | if (!item) | |
201 | continue; | |
202 | ref->symref = xstrdup((char *)item->util); | |
203 | } | |
204 | string_list_clear(&symref, 0); | |
205 | } | |
206 | ||
207 | static void process_capabilities(const char *line, int *len) | |
208 | { | |
209 | int nul_location = strlen(line); | |
210 | if (nul_location == *len) | |
211 | return; | |
212 | server_capabilities_v1 = xstrdup(line + nul_location + 1); | |
213 | *len = nul_location; | |
214 | } | |
215 | ||
216 | static int process_dummy_ref(const char *line) | |
217 | { | |
218 | struct object_id oid; | |
219 | const char *name; | |
220 | ||
221 | if (parse_oid_hex(line, &oid, &name)) | |
222 | return 0; | |
223 | if (*name != ' ') | |
224 | return 0; | |
225 | name++; | |
226 | ||
227 | return !oidcmp(&null_oid, &oid) && !strcmp(name, "capabilities^{}"); | |
228 | } | |
229 | ||
230 | static void check_no_capabilities(const char *line, int len) | |
231 | { | |
232 | if (strlen(line) != len) | |
233 | warning("Ignoring capabilities after first line '%s'", | |
234 | line + strlen(line)); | |
235 | } | |
236 | ||
237 | static int process_ref(const char *line, int len, struct ref ***list, | |
238 | unsigned int flags, struct oid_array *extra_have) | |
239 | { | |
240 | struct object_id old_oid; | |
241 | const char *name; | |
242 | ||
243 | if (parse_oid_hex(line, &old_oid, &name)) | |
244 | return 0; | |
245 | if (*name != ' ') | |
246 | return 0; | |
247 | name++; | |
248 | ||
249 | if (extra_have && !strcmp(name, ".have")) { | |
250 | oid_array_append(extra_have, &old_oid); | |
251 | } else if (!strcmp(name, "capabilities^{}")) { | |
252 | die("protocol error: unexpected capabilities^{}"); | |
253 | } else if (check_ref(name, flags)) { | |
254 | struct ref *ref = alloc_ref(name); | |
255 | oidcpy(&ref->old_oid, &old_oid); | |
256 | **list = ref; | |
257 | *list = &ref->next; | |
258 | } | |
259 | check_no_capabilities(line, len); | |
260 | return 1; | |
261 | } | |
262 | ||
263 | static int process_shallow(const char *line, int len, | |
264 | struct oid_array *shallow_points) | |
265 | { | |
266 | const char *arg; | |
267 | struct object_id old_oid; | |
268 | ||
269 | if (!skip_prefix(line, "shallow ", &arg)) | |
270 | return 0; | |
271 | ||
272 | if (get_oid_hex(arg, &old_oid)) | |
273 | die("protocol error: expected shallow sha-1, got '%s'", arg); | |
274 | if (!shallow_points) | |
275 | die("repository on the other end cannot be shallow"); | |
276 | oid_array_append(shallow_points, &old_oid); | |
277 | check_no_capabilities(line, len); | |
278 | return 1; | |
279 | } | |
280 | ||
281 | enum get_remote_heads_state { | |
282 | EXPECTING_FIRST_REF = 0, | |
283 | EXPECTING_REF, | |
284 | EXPECTING_SHALLOW, | |
285 | EXPECTING_DONE, | |
286 | }; | |
287 | ||
288 | /* | |
289 | * Read all the refs from the other end | |
290 | */ | |
291 | struct ref **get_remote_heads(struct packet_reader *reader, | |
292 | struct ref **list, unsigned int flags, | |
293 | struct oid_array *extra_have, | |
294 | struct oid_array *shallow_points) | |
295 | { | |
296 | struct ref **orig_list = list; | |
297 | int len = 0; | |
298 | enum get_remote_heads_state state = EXPECTING_FIRST_REF; | |
299 | const char *arg; | |
300 | ||
301 | *list = NULL; | |
302 | ||
303 | while (state != EXPECTING_DONE) { | |
304 | switch (packet_reader_read(reader)) { | |
305 | case PACKET_READ_EOF: | |
306 | die_initial_contact(1); | |
307 | case PACKET_READ_NORMAL: | |
308 | len = reader->pktlen; | |
309 | if (len > 4 && skip_prefix(reader->line, "ERR ", &arg)) | |
310 | die("remote error: %s", arg); | |
311 | break; | |
312 | case PACKET_READ_FLUSH: | |
313 | state = EXPECTING_DONE; | |
314 | break; | |
315 | case PACKET_READ_DELIM: | |
316 | die("invalid packet"); | |
317 | } | |
318 | ||
319 | switch (state) { | |
320 | case EXPECTING_FIRST_REF: | |
321 | process_capabilities(reader->line, &len); | |
322 | if (process_dummy_ref(reader->line)) { | |
323 | state = EXPECTING_SHALLOW; | |
324 | break; | |
325 | } | |
326 | state = EXPECTING_REF; | |
327 | /* fallthrough */ | |
328 | case EXPECTING_REF: | |
329 | if (process_ref(reader->line, len, &list, flags, extra_have)) | |
330 | break; | |
331 | state = EXPECTING_SHALLOW; | |
332 | /* fallthrough */ | |
333 | case EXPECTING_SHALLOW: | |
334 | if (process_shallow(reader->line, len, shallow_points)) | |
335 | break; | |
336 | die("protocol error: unexpected '%s'", reader->line); | |
337 | case EXPECTING_DONE: | |
338 | break; | |
339 | } | |
340 | } | |
341 | ||
342 | annotate_refs_with_symref_info(*orig_list); | |
343 | ||
344 | return list; | |
345 | } | |
346 | ||
347 | /* Returns 1 when a valid ref has been added to `list`, 0 otherwise */ | |
348 | static int process_ref_v2(const char *line, struct ref ***list) | |
349 | { | |
350 | int ret = 1; | |
351 | int i = 0; | |
352 | struct object_id old_oid; | |
353 | struct ref *ref; | |
354 | struct string_list line_sections = STRING_LIST_INIT_DUP; | |
355 | const char *end; | |
356 | ||
357 | /* | |
358 | * Ref lines have a number of fields which are space deliminated. The | |
359 | * first field is the OID of the ref. The second field is the ref | |
360 | * name. Subsequent fields (symref-target and peeled) are optional and | |
361 | * don't have a particular order. | |
362 | */ | |
363 | if (string_list_split(&line_sections, line, ' ', -1) < 2) { | |
364 | ret = 0; | |
365 | goto out; | |
366 | } | |
367 | ||
368 | if (parse_oid_hex(line_sections.items[i++].string, &old_oid, &end) || | |
369 | *end) { | |
370 | ret = 0; | |
371 | goto out; | |
372 | } | |
373 | ||
374 | ref = alloc_ref(line_sections.items[i++].string); | |
375 | ||
376 | oidcpy(&ref->old_oid, &old_oid); | |
377 | **list = ref; | |
378 | *list = &ref->next; | |
379 | ||
380 | for (; i < line_sections.nr; i++) { | |
381 | const char *arg = line_sections.items[i].string; | |
382 | if (skip_prefix(arg, "symref-target:", &arg)) | |
383 | ref->symref = xstrdup(arg); | |
384 | ||
385 | if (skip_prefix(arg, "peeled:", &arg)) { | |
386 | struct object_id peeled_oid; | |
387 | char *peeled_name; | |
388 | struct ref *peeled; | |
389 | if (parse_oid_hex(arg, &peeled_oid, &end) || *end) { | |
390 | ret = 0; | |
391 | goto out; | |
392 | } | |
393 | ||
394 | peeled_name = xstrfmt("%s^{}", ref->name); | |
395 | peeled = alloc_ref(peeled_name); | |
396 | ||
397 | oidcpy(&peeled->old_oid, &peeled_oid); | |
398 | **list = peeled; | |
399 | *list = &peeled->next; | |
400 | ||
401 | free(peeled_name); | |
402 | } | |
403 | } | |
404 | ||
405 | out: | |
406 | string_list_clear(&line_sections, 0); | |
407 | return ret; | |
408 | } | |
409 | ||
410 | struct ref **get_remote_refs(int fd_out, struct packet_reader *reader, | |
411 | struct ref **list, int for_push, | |
412 | const struct argv_array *ref_prefixes, | |
413 | const struct string_list *server_options) | |
414 | { | |
415 | int i; | |
416 | *list = NULL; | |
417 | ||
418 | if (server_supports_v2("ls-refs", 1)) | |
419 | packet_write_fmt(fd_out, "command=ls-refs\n"); | |
420 | ||
421 | if (server_supports_v2("agent", 0)) | |
422 | packet_write_fmt(fd_out, "agent=%s", git_user_agent_sanitized()); | |
423 | ||
424 | if (server_options && server_options->nr && | |
425 | server_supports_v2("server-option", 1)) | |
426 | for (i = 0; i < server_options->nr; i++) | |
427 | packet_write_fmt(fd_out, "server-option=%s", | |
428 | server_options->items[i].string); | |
429 | ||
430 | packet_delim(fd_out); | |
431 | /* When pushing we don't want to request the peeled tags */ | |
432 | if (!for_push) | |
433 | packet_write_fmt(fd_out, "peel\n"); | |
434 | packet_write_fmt(fd_out, "symrefs\n"); | |
435 | for (i = 0; ref_prefixes && i < ref_prefixes->argc; i++) { | |
436 | packet_write_fmt(fd_out, "ref-prefix %s\n", | |
437 | ref_prefixes->argv[i]); | |
438 | } | |
439 | packet_flush(fd_out); | |
440 | ||
441 | /* Process response from server */ | |
442 | while (packet_reader_read(reader) == PACKET_READ_NORMAL) { | |
443 | if (!process_ref_v2(reader->line, &list)) | |
444 | die("invalid ls-refs response: %s", reader->line); | |
445 | } | |
446 | ||
447 | if (reader->status != PACKET_READ_FLUSH) | |
448 | die("expected flush after ref listing"); | |
449 | ||
450 | return list; | |
451 | } | |
452 | ||
453 | static const char *parse_feature_value(const char *feature_list, const char *feature, int *lenp) | |
454 | { | |
455 | int len; | |
456 | ||
457 | if (!feature_list) | |
458 | return NULL; | |
459 | ||
460 | len = strlen(feature); | |
461 | while (*feature_list) { | |
462 | const char *found = strstr(feature_list, feature); | |
463 | if (!found) | |
464 | return NULL; | |
465 | if (feature_list == found || isspace(found[-1])) { | |
466 | const char *value = found + len; | |
467 | /* feature with no value (e.g., "thin-pack") */ | |
468 | if (!*value || isspace(*value)) { | |
469 | if (lenp) | |
470 | *lenp = 0; | |
471 | return value; | |
472 | } | |
473 | /* feature with a value (e.g., "agent=git/1.2.3") */ | |
474 | else if (*value == '=') { | |
475 | value++; | |
476 | if (lenp) | |
477 | *lenp = strcspn(value, " \t\n"); | |
478 | return value; | |
479 | } | |
480 | /* | |
481 | * otherwise we matched a substring of another feature; | |
482 | * keep looking | |
483 | */ | |
484 | } | |
485 | feature_list = found + 1; | |
486 | } | |
487 | return NULL; | |
488 | } | |
489 | ||
490 | int parse_feature_request(const char *feature_list, const char *feature) | |
491 | { | |
492 | return !!parse_feature_value(feature_list, feature, NULL); | |
493 | } | |
494 | ||
495 | const char *server_feature_value(const char *feature, int *len) | |
496 | { | |
497 | return parse_feature_value(server_capabilities_v1, feature, len); | |
498 | } | |
499 | ||
500 | int server_supports(const char *feature) | |
501 | { | |
502 | return !!server_feature_value(feature, NULL); | |
503 | } | |
504 | ||
505 | enum protocol { | |
506 | PROTO_LOCAL = 1, | |
507 | PROTO_FILE, | |
508 | PROTO_SSH, | |
509 | PROTO_GIT | |
510 | }; | |
511 | ||
512 | int url_is_local_not_ssh(const char *url) | |
513 | { | |
514 | const char *colon = strchr(url, ':'); | |
515 | const char *slash = strchr(url, '/'); | |
516 | return !colon || (slash && slash < colon) || | |
517 | has_dos_drive_prefix(url); | |
518 | } | |
519 | ||
520 | static const char *prot_name(enum protocol protocol) | |
521 | { | |
522 | switch (protocol) { | |
523 | case PROTO_LOCAL: | |
524 | case PROTO_FILE: | |
525 | return "file"; | |
526 | case PROTO_SSH: | |
527 | return "ssh"; | |
528 | case PROTO_GIT: | |
529 | return "git"; | |
530 | default: | |
531 | return "unknown protocol"; | |
532 | } | |
533 | } | |
534 | ||
535 | static enum protocol get_protocol(const char *name) | |
536 | { | |
537 | if (!strcmp(name, "ssh")) | |
538 | return PROTO_SSH; | |
539 | if (!strcmp(name, "git")) | |
540 | return PROTO_GIT; | |
541 | if (!strcmp(name, "git+ssh")) /* deprecated - do not use */ | |
542 | return PROTO_SSH; | |
543 | if (!strcmp(name, "ssh+git")) /* deprecated - do not use */ | |
544 | return PROTO_SSH; | |
545 | if (!strcmp(name, "file")) | |
546 | return PROTO_FILE; | |
547 | die("I don't handle protocol '%s'", name); | |
548 | } | |
549 | ||
550 | static char *host_end(char **hoststart, int removebrackets) | |
551 | { | |
552 | char *host = *hoststart; | |
553 | char *end; | |
554 | char *start = strstr(host, "@["); | |
555 | if (start) | |
556 | start++; /* Jump over '@' */ | |
557 | else | |
558 | start = host; | |
559 | if (start[0] == '[') { | |
560 | end = strchr(start + 1, ']'); | |
561 | if (end) { | |
562 | if (removebrackets) { | |
563 | *end = 0; | |
564 | memmove(start, start + 1, end - start); | |
565 | end++; | |
566 | } | |
567 | } else | |
568 | end = host; | |
569 | } else | |
570 | end = host; | |
571 | return end; | |
572 | } | |
573 | ||
574 | #define STR_(s) # s | |
575 | #define STR(s) STR_(s) | |
576 | ||
577 | static void get_host_and_port(char **host, const char **port) | |
578 | { | |
579 | char *colon, *end; | |
580 | end = host_end(host, 1); | |
581 | colon = strchr(end, ':'); | |
582 | if (colon) { | |
583 | long portnr = strtol(colon + 1, &end, 10); | |
584 | if (end != colon + 1 && *end == '\0' && 0 <= portnr && portnr < 65536) { | |
585 | *colon = 0; | |
586 | *port = colon + 1; | |
587 | } else if (!colon[1]) { | |
588 | *colon = 0; | |
589 | } | |
590 | } | |
591 | } | |
592 | ||
593 | static void enable_keepalive(int sockfd) | |
594 | { | |
595 | int ka = 1; | |
596 | ||
597 | if (setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, &ka, sizeof(ka)) < 0) | |
598 | fprintf(stderr, "unable to set SO_KEEPALIVE on socket: %s\n", | |
599 | strerror(errno)); | |
600 | } | |
601 | ||
602 | #ifndef NO_IPV6 | |
603 | ||
604 | static const char *ai_name(const struct addrinfo *ai) | |
605 | { | |
606 | static char addr[NI_MAXHOST]; | |
607 | if (getnameinfo(ai->ai_addr, ai->ai_addrlen, addr, sizeof(addr), NULL, 0, | |
608 | NI_NUMERICHOST) != 0) | |
609 | xsnprintf(addr, sizeof(addr), "(unknown)"); | |
610 | ||
611 | return addr; | |
612 | } | |
613 | ||
614 | /* | |
615 | * Returns a connected socket() fd, or else die()s. | |
616 | */ | |
617 | static int git_tcp_connect_sock(char *host, int flags) | |
618 | { | |
619 | struct strbuf error_message = STRBUF_INIT; | |
620 | int sockfd = -1; | |
621 | const char *port = STR(DEFAULT_GIT_PORT); | |
622 | struct addrinfo hints, *ai0, *ai; | |
623 | int gai; | |
624 | int cnt = 0; | |
625 | ||
626 | get_host_and_port(&host, &port); | |
627 | if (!*port) | |
628 | port = "<none>"; | |
629 | ||
630 | memset(&hints, 0, sizeof(hints)); | |
631 | if (flags & CONNECT_IPV4) | |
632 | hints.ai_family = AF_INET; | |
633 | else if (flags & CONNECT_IPV6) | |
634 | hints.ai_family = AF_INET6; | |
635 | hints.ai_socktype = SOCK_STREAM; | |
636 | hints.ai_protocol = IPPROTO_TCP; | |
637 | ||
638 | if (flags & CONNECT_VERBOSE) | |
639 | fprintf(stderr, "Looking up %s ... ", host); | |
640 | ||
641 | gai = getaddrinfo(host, port, &hints, &ai); | |
642 | if (gai) | |
643 | die("Unable to look up %s (port %s) (%s)", host, port, gai_strerror(gai)); | |
644 | ||
645 | if (flags & CONNECT_VERBOSE) | |
646 | fprintf(stderr, "done.\nConnecting to %s (port %s) ... ", host, port); | |
647 | ||
648 | for (ai0 = ai; ai; ai = ai->ai_next, cnt++) { | |
649 | sockfd = socket(ai->ai_family, | |
650 | ai->ai_socktype, ai->ai_protocol); | |
651 | if ((sockfd < 0) || | |
652 | (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0)) { | |
653 | strbuf_addf(&error_message, "%s[%d: %s]: errno=%s\n", | |
654 | host, cnt, ai_name(ai), strerror(errno)); | |
655 | if (0 <= sockfd) | |
656 | close(sockfd); | |
657 | sockfd = -1; | |
658 | continue; | |
659 | } | |
660 | if (flags & CONNECT_VERBOSE) | |
661 | fprintf(stderr, "%s ", ai_name(ai)); | |
662 | break; | |
663 | } | |
664 | ||
665 | freeaddrinfo(ai0); | |
666 | ||
667 | if (sockfd < 0) | |
668 | die("unable to connect to %s:\n%s", host, error_message.buf); | |
669 | ||
670 | enable_keepalive(sockfd); | |
671 | ||
672 | if (flags & CONNECT_VERBOSE) | |
673 | fprintf(stderr, "done.\n"); | |
674 | ||
675 | strbuf_release(&error_message); | |
676 | ||
677 | return sockfd; | |
678 | } | |
679 | ||
680 | #else /* NO_IPV6 */ | |
681 | ||
682 | /* | |
683 | * Returns a connected socket() fd, or else die()s. | |
684 | */ | |
685 | static int git_tcp_connect_sock(char *host, int flags) | |
686 | { | |
687 | struct strbuf error_message = STRBUF_INIT; | |
688 | int sockfd = -1; | |
689 | const char *port = STR(DEFAULT_GIT_PORT); | |
690 | char *ep; | |
691 | struct hostent *he; | |
692 | struct sockaddr_in sa; | |
693 | char **ap; | |
694 | unsigned int nport; | |
695 | int cnt; | |
696 | ||
697 | get_host_and_port(&host, &port); | |
698 | ||
699 | if (flags & CONNECT_VERBOSE) | |
700 | fprintf(stderr, "Looking up %s ... ", host); | |
701 | ||
702 | he = gethostbyname(host); | |
703 | if (!he) | |
704 | die("Unable to look up %s (%s)", host, hstrerror(h_errno)); | |
705 | nport = strtoul(port, &ep, 10); | |
706 | if ( ep == port || *ep ) { | |
707 | /* Not numeric */ | |
708 | struct servent *se = getservbyname(port,"tcp"); | |
709 | if ( !se ) | |
710 | die("Unknown port %s", port); | |
711 | nport = se->s_port; | |
712 | } | |
713 | ||
714 | if (flags & CONNECT_VERBOSE) | |
715 | fprintf(stderr, "done.\nConnecting to %s (port %s) ... ", host, port); | |
716 | ||
717 | for (cnt = 0, ap = he->h_addr_list; *ap; ap++, cnt++) { | |
718 | memset(&sa, 0, sizeof sa); | |
719 | sa.sin_family = he->h_addrtype; | |
720 | sa.sin_port = htons(nport); | |
721 | memcpy(&sa.sin_addr, *ap, he->h_length); | |
722 | ||
723 | sockfd = socket(he->h_addrtype, SOCK_STREAM, 0); | |
724 | if ((sockfd < 0) || | |
725 | connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) { | |
726 | strbuf_addf(&error_message, "%s[%d: %s]: errno=%s\n", | |
727 | host, | |
728 | cnt, | |
729 | inet_ntoa(*(struct in_addr *)&sa.sin_addr), | |
730 | strerror(errno)); | |
731 | if (0 <= sockfd) | |
732 | close(sockfd); | |
733 | sockfd = -1; | |
734 | continue; | |
735 | } | |
736 | if (flags & CONNECT_VERBOSE) | |
737 | fprintf(stderr, "%s ", | |
738 | inet_ntoa(*(struct in_addr *)&sa.sin_addr)); | |
739 | break; | |
740 | } | |
741 | ||
742 | if (sockfd < 0) | |
743 | die("unable to connect to %s:\n%s", host, error_message.buf); | |
744 | ||
745 | enable_keepalive(sockfd); | |
746 | ||
747 | if (flags & CONNECT_VERBOSE) | |
748 | fprintf(stderr, "done.\n"); | |
749 | ||
750 | return sockfd; | |
751 | } | |
752 | ||
753 | #endif /* NO_IPV6 */ | |
754 | ||
755 | ||
756 | /* | |
757 | * Dummy child_process returned by git_connect() if the transport protocol | |
758 | * does not need fork(2). | |
759 | */ | |
760 | static struct child_process no_fork = CHILD_PROCESS_INIT; | |
761 | ||
762 | int git_connection_is_socket(struct child_process *conn) | |
763 | { | |
764 | return conn == &no_fork; | |
765 | } | |
766 | ||
767 | static struct child_process *git_tcp_connect(int fd[2], char *host, int flags) | |
768 | { | |
769 | int sockfd = git_tcp_connect_sock(host, flags); | |
770 | ||
771 | fd[0] = sockfd; | |
772 | fd[1] = dup(sockfd); | |
773 | ||
774 | return &no_fork; | |
775 | } | |
776 | ||
777 | ||
778 | static char *git_proxy_command; | |
779 | ||
780 | static int git_proxy_command_options(const char *var, const char *value, | |
781 | void *cb) | |
782 | { | |
783 | if (!strcmp(var, "core.gitproxy")) { | |
784 | const char *for_pos; | |
785 | int matchlen = -1; | |
786 | int hostlen; | |
787 | const char *rhost_name = cb; | |
788 | int rhost_len = strlen(rhost_name); | |
789 | ||
790 | if (git_proxy_command) | |
791 | return 0; | |
792 | if (!value) | |
793 | return config_error_nonbool(var); | |
794 | /* [core] | |
795 | * ;# matches www.kernel.org as well | |
796 | * gitproxy = netcatter-1 for kernel.org | |
797 | * gitproxy = netcatter-2 for sample.xz | |
798 | * gitproxy = netcatter-default | |
799 | */ | |
800 | for_pos = strstr(value, " for "); | |
801 | if (!for_pos) | |
802 | /* matches everybody */ | |
803 | matchlen = strlen(value); | |
804 | else { | |
805 | hostlen = strlen(for_pos + 5); | |
806 | if (rhost_len < hostlen) | |
807 | matchlen = -1; | |
808 | else if (!strncmp(for_pos + 5, | |
809 | rhost_name + rhost_len - hostlen, | |
810 | hostlen) && | |
811 | ((rhost_len == hostlen) || | |
812 | rhost_name[rhost_len - hostlen -1] == '.')) | |
813 | matchlen = for_pos - value; | |
814 | else | |
815 | matchlen = -1; | |
816 | } | |
817 | if (0 <= matchlen) { | |
818 | /* core.gitproxy = none for kernel.org */ | |
819 | if (matchlen == 4 && | |
820 | !memcmp(value, "none", 4)) | |
821 | matchlen = 0; | |
822 | git_proxy_command = xmemdupz(value, matchlen); | |
823 | } | |
824 | return 0; | |
825 | } | |
826 | ||
827 | return git_default_config(var, value, cb); | |
828 | } | |
829 | ||
830 | static int git_use_proxy(const char *host) | |
831 | { | |
832 | git_proxy_command = getenv("GIT_PROXY_COMMAND"); | |
833 | git_config(git_proxy_command_options, (void*)host); | |
834 | return (git_proxy_command && *git_proxy_command); | |
835 | } | |
836 | ||
837 | static struct child_process *git_proxy_connect(int fd[2], char *host) | |
838 | { | |
839 | const char *port = STR(DEFAULT_GIT_PORT); | |
840 | struct child_process *proxy; | |
841 | ||
842 | get_host_and_port(&host, &port); | |
843 | ||
844 | if (looks_like_command_line_option(host)) | |
845 | die("strange hostname '%s' blocked", host); | |
846 | if (looks_like_command_line_option(port)) | |
847 | die("strange port '%s' blocked", port); | |
848 | ||
849 | proxy = xmalloc(sizeof(*proxy)); | |
850 | child_process_init(proxy); | |
851 | argv_array_push(&proxy->args, git_proxy_command); | |
852 | argv_array_push(&proxy->args, host); | |
853 | argv_array_push(&proxy->args, port); | |
854 | proxy->in = -1; | |
855 | proxy->out = -1; | |
856 | if (start_command(proxy)) | |
857 | die("cannot start proxy %s", git_proxy_command); | |
858 | fd[0] = proxy->out; /* read from proxy stdout */ | |
859 | fd[1] = proxy->in; /* write to proxy stdin */ | |
860 | return proxy; | |
861 | } | |
862 | ||
863 | static char *get_port(char *host) | |
864 | { | |
865 | char *end; | |
866 | char *p = strchr(host, ':'); | |
867 | ||
868 | if (p) { | |
869 | long port = strtol(p + 1, &end, 10); | |
870 | if (end != p + 1 && *end == '\0' && 0 <= port && port < 65536) { | |
871 | *p = '\0'; | |
872 | return p+1; | |
873 | } | |
874 | } | |
875 | ||
876 | return NULL; | |
877 | } | |
878 | ||
879 | /* | |
880 | * Extract protocol and relevant parts from the specified connection URL. | |
881 | * The caller must free() the returned strings. | |
882 | */ | |
883 | static enum protocol parse_connect_url(const char *url_orig, char **ret_host, | |
884 | char **ret_path) | |
885 | { | |
886 | char *url; | |
887 | char *host, *path; | |
888 | char *end; | |
889 | int separator = '/'; | |
890 | enum protocol protocol = PROTO_LOCAL; | |
891 | ||
892 | if (is_url(url_orig)) | |
893 | url = url_decode(url_orig); | |
894 | else | |
895 | url = xstrdup(url_orig); | |
896 | ||
897 | host = strstr(url, "://"); | |
898 | if (host) { | |
899 | *host = '\0'; | |
900 | protocol = get_protocol(url); | |
901 | host += 3; | |
902 | } else { | |
903 | host = url; | |
904 | if (!url_is_local_not_ssh(url)) { | |
905 | protocol = PROTO_SSH; | |
906 | separator = ':'; | |
907 | } | |
908 | } | |
909 | ||
910 | /* | |
911 | * Don't do destructive transforms as protocol code does | |
912 | * '[]' unwrapping in get_host_and_port() | |
913 | */ | |
914 | end = host_end(&host, 0); | |
915 | ||
916 | if (protocol == PROTO_LOCAL) | |
917 | path = end; | |
918 | else if (protocol == PROTO_FILE && has_dos_drive_prefix(end)) | |
919 | path = end; /* "file://$(pwd)" may be "file://C:/projects/repo" */ | |
920 | else | |
921 | path = strchr(end, separator); | |
922 | ||
923 | if (!path || !*path) | |
924 | die("No path specified. See 'man git-pull' for valid url syntax"); | |
925 | ||
926 | /* | |
927 | * null-terminate hostname and point path to ~ for URL's like this: | |
928 | * ssh://host.xz/~user/repo | |
929 | */ | |
930 | ||
931 | end = path; /* Need to \0 terminate host here */ | |
932 | if (separator == ':') | |
933 | path++; /* path starts after ':' */ | |
934 | if (protocol == PROTO_GIT || protocol == PROTO_SSH) { | |
935 | if (path[1] == '~') | |
936 | path++; | |
937 | } | |
938 | ||
939 | path = xstrdup(path); | |
940 | *end = '\0'; | |
941 | ||
942 | *ret_host = xstrdup(host); | |
943 | *ret_path = path; | |
944 | free(url); | |
945 | return protocol; | |
946 | } | |
947 | ||
948 | static const char *get_ssh_command(void) | |
949 | { | |
950 | const char *ssh; | |
951 | ||
952 | if ((ssh = getenv("GIT_SSH_COMMAND"))) | |
953 | return ssh; | |
954 | ||
955 | if (!git_config_get_string_const("core.sshcommand", &ssh)) | |
956 | return ssh; | |
957 | ||
958 | return NULL; | |
959 | } | |
960 | ||
961 | enum ssh_variant { | |
962 | VARIANT_AUTO, | |
963 | VARIANT_SIMPLE, | |
964 | VARIANT_SSH, | |
965 | VARIANT_PLINK, | |
966 | VARIANT_PUTTY, | |
967 | VARIANT_TORTOISEPLINK, | |
968 | }; | |
969 | ||
970 | static void override_ssh_variant(enum ssh_variant *ssh_variant) | |
971 | { | |
972 | const char *variant = getenv("GIT_SSH_VARIANT"); | |
973 | ||
974 | if (!variant && git_config_get_string_const("ssh.variant", &variant)) | |
975 | return; | |
976 | ||
977 | if (!strcmp(variant, "auto")) | |
978 | *ssh_variant = VARIANT_AUTO; | |
979 | else if (!strcmp(variant, "plink")) | |
980 | *ssh_variant = VARIANT_PLINK; | |
981 | else if (!strcmp(variant, "putty")) | |
982 | *ssh_variant = VARIANT_PUTTY; | |
983 | else if (!strcmp(variant, "tortoiseplink")) | |
984 | *ssh_variant = VARIANT_TORTOISEPLINK; | |
985 | else if (!strcmp(variant, "simple")) | |
986 | *ssh_variant = VARIANT_SIMPLE; | |
987 | else | |
988 | *ssh_variant = VARIANT_SSH; | |
989 | } | |
990 | ||
991 | static enum ssh_variant determine_ssh_variant(const char *ssh_command, | |
992 | int is_cmdline) | |
993 | { | |
994 | enum ssh_variant ssh_variant = VARIANT_AUTO; | |
995 | const char *variant; | |
996 | char *p = NULL; | |
997 | ||
998 | override_ssh_variant(&ssh_variant); | |
999 | ||
1000 | if (ssh_variant != VARIANT_AUTO) | |
1001 | return ssh_variant; | |
1002 | ||
1003 | if (!is_cmdline) { | |
1004 | p = xstrdup(ssh_command); | |
1005 | variant = basename(p); | |
1006 | } else { | |
1007 | const char **ssh_argv; | |
1008 | ||
1009 | p = xstrdup(ssh_command); | |
1010 | if (split_cmdline(p, &ssh_argv) > 0) { | |
1011 | variant = basename((char *)ssh_argv[0]); | |
1012 | /* | |
1013 | * At this point, variant points into the buffer | |
1014 | * referenced by p, hence we do not need ssh_argv | |
1015 | * any longer. | |
1016 | */ | |
1017 | free(ssh_argv); | |
1018 | } else { | |
1019 | free(p); | |
1020 | return ssh_variant; | |
1021 | } | |
1022 | } | |
1023 | ||
1024 | if (!strcasecmp(variant, "ssh") || | |
1025 | !strcasecmp(variant, "ssh.exe")) | |
1026 | ssh_variant = VARIANT_SSH; | |
1027 | else if (!strcasecmp(variant, "plink") || | |
1028 | !strcasecmp(variant, "plink.exe")) | |
1029 | ssh_variant = VARIANT_PLINK; | |
1030 | else if (!strcasecmp(variant, "tortoiseplink") || | |
1031 | !strcasecmp(variant, "tortoiseplink.exe")) | |
1032 | ssh_variant = VARIANT_TORTOISEPLINK; | |
1033 | ||
1034 | free(p); | |
1035 | return ssh_variant; | |
1036 | } | |
1037 | ||
1038 | /* | |
1039 | * Open a connection using Git's native protocol. | |
1040 | * | |
1041 | * The caller is responsible for freeing hostandport, but this function may | |
1042 | * modify it (for example, to truncate it to remove the port part). | |
1043 | */ | |
1044 | static struct child_process *git_connect_git(int fd[2], char *hostandport, | |
1045 | const char *path, const char *prog, | |
1046 | enum protocol_version version, | |
1047 | int flags) | |
1048 | { | |
1049 | struct child_process *conn; | |
1050 | struct strbuf request = STRBUF_INIT; | |
1051 | /* | |
1052 | * Set up virtual host information based on where we will | |
1053 | * connect, unless the user has overridden us in | |
1054 | * the environment. | |
1055 | */ | |
1056 | char *target_host = getenv("GIT_OVERRIDE_VIRTUAL_HOST"); | |
1057 | if (target_host) | |
1058 | target_host = xstrdup(target_host); | |
1059 | else | |
1060 | target_host = xstrdup(hostandport); | |
1061 | ||
1062 | transport_check_allowed("git"); | |
1063 | ||
1064 | /* | |
1065 | * These underlying connection commands die() if they | |
1066 | * cannot connect. | |
1067 | */ | |
1068 | if (git_use_proxy(hostandport)) | |
1069 | conn = git_proxy_connect(fd, hostandport); | |
1070 | else | |
1071 | conn = git_tcp_connect(fd, hostandport, flags); | |
1072 | /* | |
1073 | * Separate original protocol components prog and path | |
1074 | * from extended host header with a NUL byte. | |
1075 | * | |
1076 | * Note: Do not add any other headers here! Doing so | |
1077 | * will cause older git-daemon servers to crash. | |
1078 | */ | |
1079 | strbuf_addf(&request, | |
1080 | "%s %s%chost=%s%c", | |
1081 | prog, path, 0, | |
1082 | target_host, 0); | |
1083 | ||
1084 | /* If using a new version put that stuff here after a second null byte */ | |
1085 | if (version > 0) { | |
1086 | strbuf_addch(&request, '\0'); | |
1087 | strbuf_addf(&request, "version=%d%c", | |
1088 | version, '\0'); | |
1089 | } | |
1090 | ||
1091 | packet_write(fd[1], request.buf, request.len); | |
1092 | ||
1093 | free(target_host); | |
1094 | strbuf_release(&request); | |
1095 | return conn; | |
1096 | } | |
1097 | ||
1098 | /* | |
1099 | * Append the appropriate environment variables to `env` and options to | |
1100 | * `args` for running ssh in Git's SSH-tunneled transport. | |
1101 | */ | |
1102 | static void push_ssh_options(struct argv_array *args, struct argv_array *env, | |
1103 | enum ssh_variant variant, const char *port, | |
1104 | enum protocol_version version, int flags) | |
1105 | { | |
1106 | if (variant == VARIANT_SSH && | |
1107 | version > 0) { | |
1108 | argv_array_push(args, "-o"); | |
1109 | argv_array_push(args, "SendEnv=" GIT_PROTOCOL_ENVIRONMENT); | |
1110 | argv_array_pushf(env, GIT_PROTOCOL_ENVIRONMENT "=version=%d", | |
1111 | version); | |
1112 | } | |
1113 | ||
1114 | if (flags & CONNECT_IPV4) { | |
1115 | switch (variant) { | |
1116 | case VARIANT_AUTO: | |
1117 | BUG("VARIANT_AUTO passed to push_ssh_options"); | |
1118 | case VARIANT_SIMPLE: | |
1119 | die("ssh variant 'simple' does not support -4"); | |
1120 | case VARIANT_SSH: | |
1121 | case VARIANT_PLINK: | |
1122 | case VARIANT_PUTTY: | |
1123 | case VARIANT_TORTOISEPLINK: | |
1124 | argv_array_push(args, "-4"); | |
1125 | } | |
1126 | } else if (flags & CONNECT_IPV6) { | |
1127 | switch (variant) { | |
1128 | case VARIANT_AUTO: | |
1129 | BUG("VARIANT_AUTO passed to push_ssh_options"); | |
1130 | case VARIANT_SIMPLE: | |
1131 | die("ssh variant 'simple' does not support -6"); | |
1132 | case VARIANT_SSH: | |
1133 | case VARIANT_PLINK: | |
1134 | case VARIANT_PUTTY: | |
1135 | case VARIANT_TORTOISEPLINK: | |
1136 | argv_array_push(args, "-6"); | |
1137 | } | |
1138 | } | |
1139 | ||
1140 | if (variant == VARIANT_TORTOISEPLINK) | |
1141 | argv_array_push(args, "-batch"); | |
1142 | ||
1143 | if (port) { | |
1144 | switch (variant) { | |
1145 | case VARIANT_AUTO: | |
1146 | BUG("VARIANT_AUTO passed to push_ssh_options"); | |
1147 | case VARIANT_SIMPLE: | |
1148 | die("ssh variant 'simple' does not support setting port"); | |
1149 | case VARIANT_SSH: | |
1150 | argv_array_push(args, "-p"); | |
1151 | break; | |
1152 | case VARIANT_PLINK: | |
1153 | case VARIANT_PUTTY: | |
1154 | case VARIANT_TORTOISEPLINK: | |
1155 | argv_array_push(args, "-P"); | |
1156 | } | |
1157 | ||
1158 | argv_array_push(args, port); | |
1159 | } | |
1160 | } | |
1161 | ||
1162 | /* Prepare a child_process for use by Git's SSH-tunneled transport. */ | |
1163 | static void fill_ssh_args(struct child_process *conn, const char *ssh_host, | |
1164 | const char *port, enum protocol_version version, | |
1165 | int flags) | |
1166 | { | |
1167 | const char *ssh; | |
1168 | enum ssh_variant variant; | |
1169 | ||
1170 | if (looks_like_command_line_option(ssh_host)) | |
1171 | die("strange hostname '%s' blocked", ssh_host); | |
1172 | ||
1173 | ssh = get_ssh_command(); | |
1174 | if (ssh) { | |
1175 | variant = determine_ssh_variant(ssh, 1); | |
1176 | } else { | |
1177 | /* | |
1178 | * GIT_SSH is the no-shell version of | |
1179 | * GIT_SSH_COMMAND (and must remain so for | |
1180 | * historical compatibility). | |
1181 | */ | |
1182 | conn->use_shell = 0; | |
1183 | ||
1184 | ssh = getenv("GIT_SSH"); | |
1185 | if (!ssh) | |
1186 | ssh = "ssh"; | |
1187 | variant = determine_ssh_variant(ssh, 0); | |
1188 | } | |
1189 | ||
1190 | if (variant == VARIANT_AUTO) { | |
1191 | struct child_process detect = CHILD_PROCESS_INIT; | |
1192 | ||
1193 | detect.use_shell = conn->use_shell; | |
1194 | detect.no_stdin = detect.no_stdout = detect.no_stderr = 1; | |
1195 | ||
1196 | argv_array_push(&detect.args, ssh); | |
1197 | argv_array_push(&detect.args, "-G"); | |
1198 | push_ssh_options(&detect.args, &detect.env_array, | |
1199 | VARIANT_SSH, port, version, flags); | |
1200 | argv_array_push(&detect.args, ssh_host); | |
1201 | ||
1202 | variant = run_command(&detect) ? VARIANT_SIMPLE : VARIANT_SSH; | |
1203 | } | |
1204 | ||
1205 | argv_array_push(&conn->args, ssh); | |
1206 | push_ssh_options(&conn->args, &conn->env_array, variant, port, version, flags); | |
1207 | argv_array_push(&conn->args, ssh_host); | |
1208 | } | |
1209 | ||
1210 | /* | |
1211 | * This returns the dummy child_process `no_fork` if the transport protocol | |
1212 | * does not need fork(2), or a struct child_process object if it does. Once | |
1213 | * done, finish the connection with finish_connect() with the value returned | |
1214 | * from this function (it is safe to call finish_connect() with NULL to | |
1215 | * support the former case). | |
1216 | * | |
1217 | * If it returns, the connect is successful; it just dies on errors (this | |
1218 | * will hopefully be changed in a libification effort, to return NULL when | |
1219 | * the connection failed). | |
1220 | */ | |
1221 | struct child_process *git_connect(int fd[2], const char *url, | |
1222 | const char *prog, int flags) | |
1223 | { | |
1224 | char *hostandport, *path; | |
1225 | struct child_process *conn; | |
1226 | enum protocol protocol; | |
1227 | enum protocol_version version = get_protocol_version_config(); | |
1228 | ||
1229 | /* | |
1230 | * NEEDSWORK: If we are trying to use protocol v2 and we are planning | |
1231 | * to perform a push, then fallback to v0 since the client doesn't know | |
1232 | * how to push yet using v2. | |
1233 | */ | |
1234 | if (version == protocol_v2 && !strcmp("git-receive-pack", prog)) | |
1235 | version = protocol_v0; | |
1236 | ||
1237 | /* Without this we cannot rely on waitpid() to tell | |
1238 | * what happened to our children. | |
1239 | */ | |
1240 | signal(SIGCHLD, SIG_DFL); | |
1241 | ||
1242 | protocol = parse_connect_url(url, &hostandport, &path); | |
1243 | if ((flags & CONNECT_DIAG_URL) && (protocol != PROTO_SSH)) { | |
1244 | printf("Diag: url=%s\n", url ? url : "NULL"); | |
1245 | printf("Diag: protocol=%s\n", prot_name(protocol)); | |
1246 | printf("Diag: hostandport=%s\n", hostandport ? hostandport : "NULL"); | |
1247 | printf("Diag: path=%s\n", path ? path : "NULL"); | |
1248 | conn = NULL; | |
1249 | } else if (protocol == PROTO_GIT) { | |
1250 | conn = git_connect_git(fd, hostandport, path, prog, version, flags); | |
1251 | } else { | |
1252 | struct strbuf cmd = STRBUF_INIT; | |
1253 | const char *const *var; | |
1254 | ||
1255 | conn = xmalloc(sizeof(*conn)); | |
1256 | child_process_init(conn); | |
1257 | ||
1258 | if (looks_like_command_line_option(path)) | |
1259 | die("strange pathname '%s' blocked", path); | |
1260 | ||
1261 | strbuf_addstr(&cmd, prog); | |
1262 | strbuf_addch(&cmd, ' '); | |
1263 | sq_quote_buf(&cmd, path); | |
1264 | ||
1265 | /* remove repo-local variables from the environment */ | |
1266 | for (var = local_repo_env; *var; var++) | |
1267 | argv_array_push(&conn->env_array, *var); | |
1268 | ||
1269 | conn->use_shell = 1; | |
1270 | conn->in = conn->out = -1; | |
1271 | if (protocol == PROTO_SSH) { | |
1272 | char *ssh_host = hostandport; | |
1273 | const char *port = NULL; | |
1274 | transport_check_allowed("ssh"); | |
1275 | get_host_and_port(&ssh_host, &port); | |
1276 | ||
1277 | if (!port) | |
1278 | port = get_port(ssh_host); | |
1279 | ||
1280 | if (flags & CONNECT_DIAG_URL) { | |
1281 | printf("Diag: url=%s\n", url ? url : "NULL"); | |
1282 | printf("Diag: protocol=%s\n", prot_name(protocol)); | |
1283 | printf("Diag: userandhost=%s\n", ssh_host ? ssh_host : "NULL"); | |
1284 | printf("Diag: port=%s\n", port ? port : "NONE"); | |
1285 | printf("Diag: path=%s\n", path ? path : "NULL"); | |
1286 | ||
1287 | free(hostandport); | |
1288 | free(path); | |
1289 | free(conn); | |
1290 | strbuf_release(&cmd); | |
1291 | return NULL; | |
1292 | } | |
1293 | fill_ssh_args(conn, ssh_host, port, version, flags); | |
1294 | } else { | |
1295 | transport_check_allowed("file"); | |
1296 | if (version > 0) { | |
1297 | argv_array_pushf(&conn->env_array, GIT_PROTOCOL_ENVIRONMENT "=version=%d", | |
1298 | version); | |
1299 | } | |
1300 | } | |
1301 | argv_array_push(&conn->args, cmd.buf); | |
1302 | ||
1303 | if (start_command(conn)) | |
1304 | die("unable to fork"); | |
1305 | ||
1306 | fd[0] = conn->out; /* read from child's stdout */ | |
1307 | fd[1] = conn->in; /* write to child's stdin */ | |
1308 | strbuf_release(&cmd); | |
1309 | } | |
1310 | free(hostandport); | |
1311 | free(path); | |
1312 | return conn; | |
1313 | } | |
1314 | ||
1315 | int finish_connect(struct child_process *conn) | |
1316 | { | |
1317 | int code; | |
1318 | if (!conn || git_connection_is_socket(conn)) | |
1319 | return 0; | |
1320 | ||
1321 | code = finish_command(conn); | |
1322 | free(conn); | |
1323 | return code; | |
1324 | } |