Merge branch 'ss/get-time-cleanup'
[git/git.git] / connect.c
CommitLineData
731043fd 1#include "git-compat-util.h"
f7192598 2#include "cache.h"
b2141fc1 3#include "config.h"
41cb7488 4#include "pkt-line.h"
b10d0ec7 5#include "quote.h"
6abf5c0c 6#include "refs.h"
15a1c012 7#include "run-command.h"
6b62816c 8#include "remote.h"
47a59185 9#include "connect.h"
9d2e9420 10#include "url.h"
a45b5f05 11#include "string-list.h"
13eb4626 12#include "sha1-array.h"
a5adaced 13#include "transport.h"
0cd83283 14#include "strbuf.h"
e52449b6 15#include "version.h"
2609043d 16#include "protocol.h"
65b5f948 17#include "alias.h"
f7192598 18
e52449b6
BW
19static char *server_capabilities_v1;
20static struct argv_array server_capabilities_v2 = ARGV_ARRAY_INIT;
5d54cffc 21static const char *parse_feature_value(const char *, const char *, int *);
211b5f9e 22
be0b3f82 23static int check_ref(const char *name, unsigned int flags)
2718ff09
LT
24{
25 if (!flags)
26 return 1;
27
be0b3f82 28 if (!skip_prefix(name, "refs/", &name))
2718ff09
LT
29 return 0;
30
2718ff09 31 /* REF_NORMAL means that we don't want the magic fake tag refs */
8d9c5010 32 if ((flags & REF_NORMAL) && check_refname_format(name, 0))
2718ff09
LT
33 return 0;
34
35 /* REF_HEADS means that we want regular branch heads */
be0b3f82 36 if ((flags & REF_HEADS) && starts_with(name, "heads/"))
2718ff09
LT
37 return 1;
38
39 /* REF_TAGS means that we want tags */
be0b3f82 40 if ((flags & REF_TAGS) && starts_with(name, "tags/"))
2718ff09
LT
41 return 1;
42
43 /* All type bits clear means that we are ok with anything */
44 return !(flags & ~REF_NORMAL);
45}
46
4577370e
DB
47int check_ref_type(const struct ref *ref, int flags)
48{
be0b3f82 49 return check_ref(ref->name, flags);
4577370e
DB
50}
51
d2bff22c 52static NORETURN void die_initial_contact(int unexpected)
46284dd1 53{
7e3e479b
BW
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 */
55e4f936 60 if (unexpected)
1a07e59c 61 die(_("the remote end hung up upon initial contact"));
46284dd1 62 else
f2b93b38
VA
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."));
46284dd1
HV
66}
67
e52449b6
BW
68/* Checks if the server supports the capability 'c' */
69int 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)
aad6fddb 81 die(_("server doesn't support '%s'"), c);
e52449b6
BW
82
83 return 0;
84}
85
f7e20501
BW
86int 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)
aad6fddb 103 die(_("server doesn't support feature '%s'"), feature);
f7e20501
BW
104
105 return 0;
106}
107
e52449b6
BW
108static 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)
aad6fddb 114 die(_("expected flush after capabilities"));
e52449b6
BW
115}
116
ad6ac124 117enum protocol_version discover_version(struct packet_reader *reader)
7e3e479b
BW
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) {
8f6982b4 138 case protocol_v2:
e52449b6 139 process_capabilities_v2(reader);
8f6982b4 140 break;
7e3e479b
BW
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
a45b5f05
JH
154static 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" */
5c0b13f8 162 sym = xmemdupz(val, len);
a45b5f05
JH
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;
ef4fe561 172 item = string_list_append_nodup(symref, sym);
a45b5f05
JH
173 item->util = target;
174 return;
175reject:
176 free(sym);
177 return;
178}
179
180static void annotate_refs_with_symref_info(struct ref *ref)
181{
182 struct string_list symref = STRING_LIST_INIT_DUP;
e52449b6 183 const char *feature_list = server_capabilities_v1;
a45b5f05
JH
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 }
3383e199 195 string_list_sort(&symref);
a45b5f05
JH
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
7e3e479b 207static void process_capabilities(const char *line, int *len)
2609043d 208{
7e3e479b 209 int nul_location = strlen(line);
0cd83283
JT
210 if (nul_location == *len)
211 return;
e52449b6 212 server_capabilities_v1 = xstrdup(line + nul_location + 1);
0cd83283
JT
213 *len = nul_location;
214}
215
7e3e479b 216static int process_dummy_ref(const char *line)
0cd83283
JT
217{
218 struct object_id oid;
219 const char *name;
220
7e3e479b 221 if (parse_oid_hex(line, &oid, &name))
0cd83283
JT
222 return 0;
223 if (*name != ' ')
224 return 0;
225 name++;
226
4a7e27e9 227 return oideq(&null_oid, &oid) && !strcmp(name, "capabilities^{}");
0cd83283
JT
228}
229
7e3e479b 230static void check_no_capabilities(const char *line, int len)
0cd83283 231{
7e3e479b 232 if (strlen(line) != len)
aad6fddb 233 warning(_("ignoring capabilities after first line '%s'"),
7e3e479b 234 line + strlen(line));
0cd83283
JT
235}
236
7e3e479b
BW
237static int process_ref(const char *line, int len, struct ref ***list,
238 unsigned int flags, struct oid_array *extra_have)
0cd83283
JT
239{
240 struct object_id old_oid;
241 const char *name;
242
7e3e479b 243 if (parse_oid_hex(line, &old_oid, &name))
0cd83283
JT
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^{}")) {
aad6fddb 252 die(_("protocol error: unexpected capabilities^{}"));
0cd83283
JT
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 }
7e3e479b 259 check_no_capabilities(line, len);
0cd83283
JT
260 return 1;
261}
262
7e3e479b
BW
263static int process_shallow(const char *line, int len,
264 struct oid_array *shallow_points)
0cd83283
JT
265{
266 const char *arg;
267 struct object_id old_oid;
268
7e3e479b 269 if (!skip_prefix(line, "shallow ", &arg))
0cd83283
JT
270 return 0;
271
272 if (get_oid_hex(arg, &old_oid))
aad6fddb 273 die(_("protocol error: expected shallow sha-1, got '%s'"), arg);
0cd83283 274 if (!shallow_points)
aad6fddb 275 die(_("repository on the other end cannot be shallow"));
0cd83283 276 oid_array_append(shallow_points, &old_oid);
7e3e479b 277 check_no_capabilities(line, len);
0cd83283
JT
278 return 1;
279}
280
7e3e479b
BW
281enum get_remote_heads_state {
282 EXPECTING_FIRST_REF = 0,
283 EXPECTING_REF,
284 EXPECTING_SHALLOW,
285 EXPECTING_DONE,
286};
287
d1c133f5
LT
288/*
289 * Read all the refs from the other end
290 */
ad6ac124 291struct ref **get_remote_heads(struct packet_reader *reader,
85edf4f5 292 struct ref **list, unsigned int flags,
910650d2 293 struct oid_array *extra_have,
294 struct oid_array *shallow_points)
d1c133f5 295{
a45b5f05 296 struct ref **orig_list = list;
7e3e479b
BW
297 int len = 0;
298 enum get_remote_heads_state state = EXPECTING_FIRST_REF;
55e4f936 299
d1c133f5 300 *list = NULL;
1a7141ff 301
7e3e479b 302 while (state != EXPECTING_DONE) {
ad6ac124 303 switch (packet_reader_read(reader)) {
7e3e479b
BW
304 case PACKET_READ_EOF:
305 die_initial_contact(1);
306 case PACKET_READ_NORMAL:
ad6ac124 307 len = reader->pktlen;
7e3e479b
BW
308 break;
309 case PACKET_READ_FLUSH:
310 state = EXPECTING_DONE;
311 break;
312 case PACKET_READ_DELIM:
aad6fddb 313 die(_("invalid packet"));
7e3e479b
BW
314 }
315
0cd83283
JT
316 switch (state) {
317 case EXPECTING_FIRST_REF:
ad6ac124
BW
318 process_capabilities(reader->line, &len);
319 if (process_dummy_ref(reader->line)) {
0cd83283
JT
320 state = EXPECTING_SHALLOW;
321 break;
322 }
323 state = EXPECTING_REF;
324 /* fallthrough */
325 case EXPECTING_REF:
ad6ac124 326 if (process_ref(reader->line, len, &list, flags, extra_have))
0cd83283
JT
327 break;
328 state = EXPECTING_SHALLOW;
329 /* fallthrough */
330 case EXPECTING_SHALLOW:
ad6ac124 331 if (process_shallow(reader->line, len, shallow_points))
0cd83283 332 break;
aad6fddb 333 die(_("protocol error: unexpected '%s'"), reader->line);
7e3e479b
BW
334 case EXPECTING_DONE:
335 break;
211b5f9e 336 }
d1c133f5 337 }
a45b5f05
JH
338
339 annotate_refs_with_symref_info(*orig_list);
340
d1c133f5
LT
341 return list;
342}
343
e52449b6
BW
344/* Returns 1 when a valid ref has been added to `list`, 0 otherwise */
345static int process_ref_v2(const char *line, struct ref ***list)
346{
347 int ret = 1;
348 int i = 0;
349 struct object_id old_oid;
350 struct ref *ref;
351 struct string_list line_sections = STRING_LIST_INIT_DUP;
352 const char *end;
353
354 /*
355 * Ref lines have a number of fields which are space deliminated. The
356 * first field is the OID of the ref. The second field is the ref
357 * name. Subsequent fields (symref-target and peeled) are optional and
358 * don't have a particular order.
359 */
360 if (string_list_split(&line_sections, line, ' ', -1) < 2) {
361 ret = 0;
362 goto out;
363 }
364
365 if (parse_oid_hex(line_sections.items[i++].string, &old_oid, &end) ||
366 *end) {
367 ret = 0;
368 goto out;
369 }
370
371 ref = alloc_ref(line_sections.items[i++].string);
372
373 oidcpy(&ref->old_oid, &old_oid);
374 **list = ref;
375 *list = &ref->next;
376
377 for (; i < line_sections.nr; i++) {
378 const char *arg = line_sections.items[i].string;
379 if (skip_prefix(arg, "symref-target:", &arg))
380 ref->symref = xstrdup(arg);
381
382 if (skip_prefix(arg, "peeled:", &arg)) {
383 struct object_id peeled_oid;
384 char *peeled_name;
385 struct ref *peeled;
386 if (parse_oid_hex(arg, &peeled_oid, &end) || *end) {
387 ret = 0;
388 goto out;
389 }
390
391 peeled_name = xstrfmt("%s^{}", ref->name);
392 peeled = alloc_ref(peeled_name);
393
394 oidcpy(&peeled->old_oid, &peeled_oid);
395 **list = peeled;
396 *list = &peeled->next;
397
398 free(peeled_name);
399 }
400 }
401
402out:
403 string_list_clear(&line_sections, 0);
404 return ret;
405}
406
407struct ref **get_remote_refs(int fd_out, struct packet_reader *reader,
408 struct ref **list, int for_push,
ff473221
BW
409 const struct argv_array *ref_prefixes,
410 const struct string_list *server_options)
e52449b6
BW
411{
412 int i;
413 *list = NULL;
414
415 if (server_supports_v2("ls-refs", 1))
416 packet_write_fmt(fd_out, "command=ls-refs\n");
417
418 if (server_supports_v2("agent", 0))
419 packet_write_fmt(fd_out, "agent=%s", git_user_agent_sanitized());
420
ff473221
BW
421 if (server_options && server_options->nr &&
422 server_supports_v2("server-option", 1))
423 for (i = 0; i < server_options->nr; i++)
424 packet_write_fmt(fd_out, "server-option=%s",
425 server_options->items[i].string);
426
e52449b6
BW
427 packet_delim(fd_out);
428 /* When pushing we don't want to request the peeled tags */
429 if (!for_push)
430 packet_write_fmt(fd_out, "peel\n");
431 packet_write_fmt(fd_out, "symrefs\n");
432 for (i = 0; ref_prefixes && i < ref_prefixes->argc; i++) {
433 packet_write_fmt(fd_out, "ref-prefix %s\n",
434 ref_prefixes->argv[i]);
435 }
436 packet_flush(fd_out);
437
438 /* Process response from server */
439 while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
440 if (!process_ref_v2(reader->line, &list))
aad6fddb 441 die(_("invalid ls-refs response: %s"), reader->line);
e52449b6
BW
442 }
443
444 if (reader->status != PACKET_READ_FLUSH)
aad6fddb 445 die(_("expected flush after ref listing"));
e52449b6
BW
446
447 return list;
448}
449
5d54cffc 450static const char *parse_feature_value(const char *feature_list, const char *feature, int *lenp)
f47182c8
JH
451{
452 int len;
453
454 if (!feature_list)
455 return NULL;
456
457 len = strlen(feature);
458 while (*feature_list) {
459 const char *found = strstr(feature_list, feature);
460 if (!found)
461 return NULL;
94427108
JK
462 if (feature_list == found || isspace(found[-1])) {
463 const char *value = found + len;
464 /* feature with no value (e.g., "thin-pack") */
465 if (!*value || isspace(*value)) {
466 if (lenp)
467 *lenp = 0;
468 return value;
469 }
470 /* feature with a value (e.g., "agent=git/1.2.3") */
471 else if (*value == '=') {
472 value++;
473 if (lenp)
474 *lenp = strcspn(value, " \t\n");
475 return value;
476 }
477 /*
478 * otherwise we matched a substring of another feature;
479 * keep looking
480 */
481 }
f47182c8
JH
482 feature_list = found + 1;
483 }
484 return NULL;
211b5f9e
JS
485}
486
94427108
JK
487int parse_feature_request(const char *feature_list, const char *feature)
488{
489 return !!parse_feature_value(feature_list, feature, NULL);
490}
491
492const char *server_feature_value(const char *feature, int *len)
493{
e52449b6 494 return parse_feature_value(server_capabilities_v1, feature, len);
94427108
JK
495}
496
497int server_supports(const char *feature)
498{
499 return !!server_feature_value(feature, NULL);
500}
501
2386d658
LT
502enum protocol {
503 PROTO_LOCAL = 1,
c59ab2e5 504 PROTO_FILE,
2386d658 505 PROTO_SSH,
4b05548f 506 PROTO_GIT
2386d658
LT
507};
508
c59ab2e5
TB
509int url_is_local_not_ssh(const char *url)
510{
511 const char *colon = strchr(url, ':');
512 const char *slash = strchr(url, '/');
513 return !colon || (slash && slash < colon) ||
514 has_dos_drive_prefix(url);
515}
516
5610b7c0
TB
517static const char *prot_name(enum protocol protocol)
518{
519 switch (protocol) {
520 case PROTO_LOCAL:
c59ab2e5 521 case PROTO_FILE:
5610b7c0
TB
522 return "file";
523 case PROTO_SSH:
524 return "ssh";
525 case PROTO_GIT:
526 return "git";
527 default:
83e6bda3 528 return "unknown protocol";
5610b7c0
TB
529 }
530}
531
2386d658
LT
532static enum protocol get_protocol(const char *name)
533{
534 if (!strcmp(name, "ssh"))
535 return PROTO_SSH;
536 if (!strcmp(name, "git"))
537 return PROTO_GIT;
07c7782c 538 if (!strcmp(name, "git+ssh")) /* deprecated - do not use */
c05186cc 539 return PROTO_SSH;
07c7782c 540 if (!strcmp(name, "ssh+git")) /* deprecated - do not use */
c05186cc 541 return PROTO_SSH;
72a4f4b6 542 if (!strcmp(name, "file"))
c59ab2e5 543 return PROTO_FILE;
aad6fddb 544 die(_("protocol '%s' is not supported"), name);
2386d658
LT
545}
546
86ceb337
TB
547static char *host_end(char **hoststart, int removebrackets)
548{
549 char *host = *hoststart;
550 char *end;
551 char *start = strstr(host, "@[");
552 if (start)
553 start++; /* Jump over '@' */
554 else
555 start = host;
556 if (start[0] == '[') {
557 end = strchr(start + 1, ']');
558 if (end) {
559 if (removebrackets) {
560 *end = 0;
561 memmove(start, start + 1, end - start);
562 end++;
563 }
564 } else
565 end = host;
566 } else
567 end = host;
568 return end;
569}
570
5ba88448
YH
571#define STR_(s) # s
572#define STR(s) STR_(s)
2386d658 573
72a534da
ML
574static void get_host_and_port(char **host, const char **port)
575{
576 char *colon, *end;
86ceb337 577 end = host_end(host, 1);
72a534da 578 colon = strchr(end, ':');
72a534da 579 if (colon) {
86ceb337
TB
580 long portnr = strtol(colon + 1, &end, 10);
581 if (end != colon + 1 && *end == '\0' && 0 <= portnr && portnr < 65536) {
582 *colon = 0;
583 *port = colon + 1;
6b6c5f7a
TB
584 } else if (!colon[1]) {
585 *colon = 0;
86ceb337 586 }
72a534da
ML
587 }
588}
589
e47a8583
EW
590static void enable_keepalive(int sockfd)
591{
592 int ka = 1;
593
594 if (setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, &ka, sizeof(ka)) < 0)
aad6fddb 595 error_errno(_("unable to set SO_KEEPALIVE on socket"));
e47a8583
EW
596}
597
49744d63 598#ifndef NO_IPV6
4c505f71 599
ba505322
AR
600static const char *ai_name(const struct addrinfo *ai)
601{
785a9857
BK
602 static char addr[NI_MAXHOST];
603 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, addr, sizeof(addr), NULL, 0,
604 NI_NUMERICHOST) != 0)
5096d490 605 xsnprintf(addr, sizeof(addr), "(unknown)");
785a9857 606
ba505322
AR
607 return addr;
608}
609
5ad312be
JL
610/*
611 * Returns a connected socket() fd, or else die()s.
612 */
7841ce79 613static int git_tcp_connect_sock(char *host, int flags)
2386d658 614{
63a995b6
DZ
615 struct strbuf error_message = STRBUF_INIT;
616 int sockfd = -1;
554fe20d 617 const char *port = STR(DEFAULT_GIT_PORT);
5ba88448
YH
618 struct addrinfo hints, *ai0, *ai;
619 int gai;
ba505322 620 int cnt = 0;
5ba88448 621
72a534da
ML
622 get_host_and_port(&host, &port);
623 if (!*port)
624 port = "<none>";
5ba88448
YH
625
626 memset(&hints, 0, sizeof(hints));
c915f11e
EW
627 if (flags & CONNECT_IPV4)
628 hints.ai_family = AF_INET;
629 else if (flags & CONNECT_IPV6)
630 hints.ai_family = AF_INET6;
5ba88448
YH
631 hints.ai_socktype = SOCK_STREAM;
632 hints.ai_protocol = IPPROTO_TCP;
633
7841ce79 634 if (flags & CONNECT_VERBOSE)
aad6fddb 635 fprintf(stderr, _("Looking up %s ... "), host);
7841ce79 636
5ba88448
YH
637 gai = getaddrinfo(host, port, &hints, &ai);
638 if (gai)
aad6fddb 639 die(_("unable to look up %s (port %s) (%s)"), host, port, gai_strerror(gai));
5ba88448 640
7841ce79 641 if (flags & CONNECT_VERBOSE)
aad6fddb
NTND
642 /* TRANSLATORS: this is the end of "Looking up %s ... " */
643 fprintf(stderr, _("done.\nConnecting to %s (port %s) ... "), host, port);
7841ce79 644
e08afecd 645 for (ai0 = ai; ai; ai = ai->ai_next, cnt++) {
5ad312be
JL
646 sockfd = socket(ai->ai_family,
647 ai->ai_socktype, ai->ai_protocol);
63a995b6
DZ
648 if ((sockfd < 0) ||
649 (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0)) {
650 strbuf_addf(&error_message, "%s[%d: %s]: errno=%s\n",
651 host, cnt, ai_name(ai), strerror(errno));
652 if (0 <= sockfd)
653 close(sockfd);
5ba88448
YH
654 sockfd = -1;
655 continue;
2386d658 656 }
ba505322
AR
657 if (flags & CONNECT_VERBOSE)
658 fprintf(stderr, "%s ", ai_name(ai));
5ba88448 659 break;
2386d658
LT
660 }
661
5ba88448 662 freeaddrinfo(ai0);
2386d658 663
2386d658 664 if (sockfd < 0)
aad6fddb 665 die(_("unable to connect to %s:\n%s"), host, error_message.buf);
5ba88448 666
e47a8583
EW
667 enable_keepalive(sockfd);
668
7841ce79 669 if (flags & CONNECT_VERBOSE)
aad6fddb
NTND
670 /* TRANSLATORS: this is the end of "Connecting to %s (port %s) ... " */
671 fprintf_ln(stderr, _("done."));
7841ce79 672
63a995b6
DZ
673 strbuf_release(&error_message);
674
5ad312be 675 return sockfd;
2386d658
LT
676}
677
49744d63 678#else /* NO_IPV6 */
4c505f71 679
5ad312be
JL
680/*
681 * Returns a connected socket() fd, or else die()s.
682 */
7841ce79 683static int git_tcp_connect_sock(char *host, int flags)
4c505f71 684{
7203a2d1
EFL
685 struct strbuf error_message = STRBUF_INIT;
686 int sockfd = -1;
72a534da
ML
687 const char *port = STR(DEFAULT_GIT_PORT);
688 char *ep;
4c505f71
PA
689 struct hostent *he;
690 struct sockaddr_in sa;
691 char **ap;
692 unsigned int nport;
ba505322 693 int cnt;
4c505f71 694
72a534da 695 get_host_and_port(&host, &port);
4c505f71 696
7841ce79 697 if (flags & CONNECT_VERBOSE)
aad6fddb 698 fprintf(stderr, _("Looking up %s ... "), host);
7841ce79 699
4c505f71
PA
700 he = gethostbyname(host);
701 if (!he)
aad6fddb 702 die(_("unable to look up %s (%s)"), host, hstrerror(h_errno));
4c505f71
PA
703 nport = strtoul(port, &ep, 10);
704 if ( ep == port || *ep ) {
705 /* Not numeric */
706 struct servent *se = getservbyname(port,"tcp");
707 if ( !se )
aad6fddb 708 die(_("unknown port %s"), port);
4c505f71
PA
709 nport = se->s_port;
710 }
711
7841ce79 712 if (flags & CONNECT_VERBOSE)
aad6fddb
NTND
713 /* TRANSLATORS: this is the end of "Looking up %s ... " */
714 fprintf(stderr, _("done.\nConnecting to %s (port %s) ... "), host, port);
7841ce79 715
ba505322 716 for (cnt = 0, ap = he->h_addr_list; *ap; ap++, cnt++) {
4c505f71
PA
717 memset(&sa, 0, sizeof sa);
718 sa.sin_family = he->h_addrtype;
6573faff 719 sa.sin_port = htons(nport);
c6164218 720 memcpy(&sa.sin_addr, *ap, he->h_length);
4c505f71 721
7203a2d1
EFL
722 sockfd = socket(he->h_addrtype, SOCK_STREAM, 0);
723 if ((sockfd < 0) ||
724 connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) {
725 strbuf_addf(&error_message, "%s[%d: %s]: errno=%s\n",
ba505322
AR
726 host,
727 cnt,
728 inet_ntoa(*(struct in_addr *)&sa.sin_addr),
7203a2d1
EFL
729 strerror(errno));
730 if (0 <= sockfd)
731 close(sockfd);
4c505f71
PA
732 sockfd = -1;
733 continue;
734 }
ba505322
AR
735 if (flags & CONNECT_VERBOSE)
736 fprintf(stderr, "%s ",
737 inet_ntoa(*(struct in_addr *)&sa.sin_addr));
4c505f71
PA
738 break;
739 }
740
741 if (sockfd < 0)
aad6fddb 742 die(_("unable to connect to %s:\n%s"), host, error_message.buf);
4c505f71 743
e47a8583
EW
744 enable_keepalive(sockfd);
745
7841ce79 746 if (flags & CONNECT_VERBOSE)
aad6fddb
NTND
747 /* TRANSLATORS: this is the end of "Connecting to %s (port %s) ... " */
748 fprintf_ln(stderr, _("done."));
7841ce79 749
5ad312be
JL
750 return sockfd;
751}
752
753#endif /* NO_IPV6 */
754
755
8e349780
JN
756/*
757 * Dummy child_process returned by git_connect() if the transport protocol
758 * does not need fork(2).
759 */
760static struct child_process no_fork = CHILD_PROCESS_INIT;
761
762int git_connection_is_socket(struct child_process *conn)
763{
764 return conn == &no_fork;
765}
766
767static struct child_process *git_tcp_connect(int fd[2], char *host, int flags)
5ad312be 768{
7841ce79 769 int sockfd = git_tcp_connect_sock(host, flags);
5ad312be 770
4c505f71 771 fd[0] = sockfd;
ec587fde 772 fd[1] = dup(sockfd);
8e349780
JN
773
774 return &no_fork;
4c505f71
PA
775}
776
4c505f71 777
96f1e58f 778static char *git_proxy_command;
f8014776 779
ef90d6d4
JS
780static int git_proxy_command_options(const char *var, const char *value,
781 void *cb)
f8014776 782{
e814bc4d 783 if (!strcmp(var, "core.gitproxy")) {
c3df8568
YH
784 const char *for_pos;
785 int matchlen = -1;
786 int hostlen;
15112c95
EFL
787 const char *rhost_name = cb;
788 int rhost_len = strlen(rhost_name);
c3df8568 789
e814bc4d 790 if (git_proxy_command)
f8014776 791 return 0;
c64b9ad0
JH
792 if (!value)
793 return config_error_nonbool(var);
e814bc4d
JH
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 */
c3df8568 800 for_pos = strstr(value, " for ");
e814bc4d
JH
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 */
a6080a0a 819 if (matchlen == 4 &&
e814bc4d
JH
820 !memcmp(value, "none", 4))
821 matchlen = 0;
182af834 822 git_proxy_command = xmemdupz(value, matchlen);
f8014776 823 }
e814bc4d 824 return 0;
f8014776
PC
825 }
826
ef90d6d4 827 return git_default_config(var, value, cb);
f8014776
PC
828}
829
e814bc4d 830static int git_use_proxy(const char *host)
f8014776
PC
831{
832 git_proxy_command = getenv("GIT_PROXY_COMMAND");
15112c95 833 git_config(git_proxy_command_options, (void*)host);
e814bc4d 834 return (git_proxy_command && *git_proxy_command);
f8014776
PC
835}
836
5cbf8246 837static struct child_process *git_proxy_connect(int fd[2], char *host)
f8014776 838{
554fe20d 839 const char *port = STR(DEFAULT_GIT_PORT);
5cbf8246 840 struct child_process *proxy;
f8014776 841
72a534da 842 get_host_and_port(&host, &port);
f8014776 843
3be4cf09 844 if (looks_like_command_line_option(host))
aad6fddb 845 die(_("strange hostname '%s' blocked"), host);
3be4cf09 846 if (looks_like_command_line_option(port))
aad6fddb 847 die(_("strange port '%s' blocked"), port);
3be4cf09 848
483bbd4e
RS
849 proxy = xmalloc(sizeof(*proxy));
850 child_process_init(proxy);
1823bea1
JK
851 argv_array_push(&proxy->args, git_proxy_command);
852 argv_array_push(&proxy->args, host);
853 argv_array_push(&proxy->args, port);
5cbf8246
JK
854 proxy->in = -1;
855 proxy->out = -1;
856 if (start_command(proxy))
aad6fddb 857 die(_("cannot start proxy %s"), git_proxy_command);
5cbf8246
JK
858 fd[0] = proxy->out; /* read from proxy stdout */
859 fd[1] = proxy->in; /* write to proxy stdin */
860 return proxy;
f8014776
PC
861}
862
86ceb337 863static char *get_port(char *host)
2e776665
LT
864{
865 char *end;
86ceb337
TB
866 char *p = strchr(host, ':');
867
2e776665 868 if (p) {
8f148253
RS
869 long port = strtol(p + 1, &end, 10);
870 if (end != p + 1 && *end == '\0' && 0 <= port && port < 65536) {
86ceb337
TB
871 *p = '\0';
872 return p+1;
2e776665
LT
873 }
874 }
875
876 return NULL;
877}
878
f7192598 879/*
cabc3c12
JS
880 * Extract protocol and relevant parts from the specified connection URL.
881 * The caller must free() the returned strings.
f7192598 882 */
cabc3c12 883static enum protocol parse_connect_url(const char *url_orig, char **ret_host,
83b05875 884 char **ret_path)
f7192598 885{
9d2e9420 886 char *url;
8e76bf3f 887 char *host, *path;
356bece0 888 char *end;
c59ab2e5 889 int separator = '/';
faea9ccb 890 enum protocol protocol = PROTO_LOCAL;
f0b7367c 891
9d2e9420
JK
892 if (is_url(url_orig))
893 url = url_decode(url_orig);
894 else
895 url = xstrdup(url_orig);
896
faea9ccb 897 host = strstr(url, "://");
eeefa7c9 898 if (host) {
faea9ccb
AE
899 *host = '\0';
900 protocol = get_protocol(url);
901 host += 3;
356bece0 902 } else {
f7192598 903 host = url;
c59ab2e5
TB
904 if (!url_is_local_not_ssh(url)) {
905 protocol = PROTO_SSH;
906 separator = ':';
907 }
356bece0
YH
908 }
909
9aa5053d 910 /*
83b05875
TB
911 * Don't do destructive transforms as protocol code does
912 * '[]' unwrapping in get_host_and_port()
9aa5053d 913 */
86ceb337 914 end = host_end(&host, 0);
356bece0 915
c59ab2e5 916 if (protocol == PROTO_LOCAL)
72a4f4b6 917 path = end;
ebb8d2c9
TB
918 else if (protocol == PROTO_FILE && *host != '/' &&
919 !has_dos_drive_prefix(host) &&
920 offset_1st_component(host - 2) > 1)
921 path = host - 2; /* include the leading "//" */
c59ab2e5
TB
922 else if (protocol == PROTO_FILE && has_dos_drive_prefix(end))
923 path = end; /* "file://$(pwd)" may be "file://C:/projects/repo" */
924 else
925 path = strchr(end, separator);
2386d658 926
faea9ccb 927 if (!path || !*path)
aad6fddb 928 die(_("no path specified; see 'git help pull' for valid url syntax"));
faea9ccb
AE
929
930 /*
931 * null-terminate hostname and point path to ~ for URL's like this:
932 * ssh://host.xz/~user/repo
933 */
c59ab2e5
TB
934
935 end = path; /* Need to \0 terminate host here */
936 if (separator == ':')
937 path++; /* path starts after ':' */
938 if (protocol == PROTO_GIT || protocol == PROTO_SSH) {
faea9ccb
AE
939 if (path[1] == '~')
940 path++;
faea9ccb
AE
941 }
942
c59ab2e5
TB
943 path = xstrdup(path);
944 *end = '\0';
945
cabc3c12 946 *ret_host = xstrdup(host);
c59ab2e5 947 *ret_path = path;
cabc3c12
JS
948 free(url);
949 return protocol;
950}
951
3c8ede3f
NTND
952static const char *get_ssh_command(void)
953{
954 const char *ssh;
955
956 if ((ssh = getenv("GIT_SSH_COMMAND")))
957 return ssh;
958
959 if (!git_config_get_string_const("core.sshcommand", &ssh))
960 return ssh;
961
962 return NULL;
963}
964
94b8ae5a 965enum ssh_variant {
0da0e49b 966 VARIANT_AUTO,
94b8ae5a
BW
967 VARIANT_SIMPLE,
968 VARIANT_SSH,
969 VARIANT_PLINK,
970 VARIANT_PUTTY,
971 VARIANT_TORTOISEPLINK,
972};
973
0da0e49b 974static void override_ssh_variant(enum ssh_variant *ssh_variant)
e2824e47 975{
94b8ae5a 976 const char *variant = getenv("GIT_SSH_VARIANT");
486c8e8c 977
94b8ae5a 978 if (!variant && git_config_get_string_const("ssh.variant", &variant))
0da0e49b 979 return;
486c8e8c 980
0da0e49b
JN
981 if (!strcmp(variant, "auto"))
982 *ssh_variant = VARIANT_AUTO;
983 else if (!strcmp(variant, "plink"))
94b8ae5a
BW
984 *ssh_variant = VARIANT_PLINK;
985 else if (!strcmp(variant, "putty"))
986 *ssh_variant = VARIANT_PUTTY;
987 else if (!strcmp(variant, "tortoiseplink"))
988 *ssh_variant = VARIANT_TORTOISEPLINK;
989 else if (!strcmp(variant, "simple"))
990 *ssh_variant = VARIANT_SIMPLE;
991 else
992 *ssh_variant = VARIANT_SSH;
486c8e8c
JH
993}
994
94b8ae5a
BW
995static enum ssh_variant determine_ssh_variant(const char *ssh_command,
996 int is_cmdline)
486c8e8c 997{
0da0e49b 998 enum ssh_variant ssh_variant = VARIANT_AUTO;
486c8e8c 999 const char *variant;
e2824e47
JS
1000 char *p = NULL;
1001
0da0e49b
JN
1002 override_ssh_variant(&ssh_variant);
1003
1004 if (ssh_variant != VARIANT_AUTO)
94b8ae5a 1005 return ssh_variant;
486c8e8c
JH
1006
1007 if (!is_cmdline) {
e2824e47
JS
1008 p = xstrdup(ssh_command);
1009 variant = basename(p);
1010 } else {
1011 const char **ssh_argv;
1012
1013 p = xstrdup(ssh_command);
22e5ae5c 1014 if (split_cmdline(p, &ssh_argv) > 0) {
e2824e47
JS
1015 variant = basename((char *)ssh_argv[0]);
1016 /*
1017 * At this point, variant points into the buffer
1018 * referenced by p, hence we do not need ssh_argv
1019 * any longer.
1020 */
1021 free(ssh_argv);
5d2993b6
JK
1022 } else {
1023 free(p);
94b8ae5a 1024 return ssh_variant;
5d2993b6 1025 }
e2824e47
JS
1026 }
1027
94b8ae5a
BW
1028 if (!strcasecmp(variant, "ssh") ||
1029 !strcasecmp(variant, "ssh.exe"))
1030 ssh_variant = VARIANT_SSH;
1031 else if (!strcasecmp(variant, "plink") ||
1032 !strcasecmp(variant, "plink.exe"))
1033 ssh_variant = VARIANT_PLINK;
e2824e47 1034 else if (!strcasecmp(variant, "tortoiseplink") ||
94b8ae5a
BW
1035 !strcasecmp(variant, "tortoiseplink.exe"))
1036 ssh_variant = VARIANT_TORTOISEPLINK;
1037
e2824e47 1038 free(p);
94b8ae5a 1039 return ssh_variant;
e2824e47
JS
1040}
1041
2ac67cb6
JN
1042/*
1043 * Open a connection using Git's native protocol.
1044 *
1045 * The caller is responsible for freeing hostandport, but this function may
1046 * modify it (for example, to truncate it to remove the port part).
1047 */
1048static struct child_process *git_connect_git(int fd[2], char *hostandport,
1049 const char *path, const char *prog,
40fc51e3 1050 enum protocol_version version,
2ac67cb6
JN
1051 int flags)
1052{
1053 struct child_process *conn;
1054 struct strbuf request = STRBUF_INIT;
1055 /*
1056 * Set up virtual host information based on where we will
1057 * connect, unless the user has overridden us in
1058 * the environment.
1059 */
1060 char *target_host = getenv("GIT_OVERRIDE_VIRTUAL_HOST");
1061 if (target_host)
1062 target_host = xstrdup(target_host);
1063 else
1064 target_host = xstrdup(hostandport);
1065
1066 transport_check_allowed("git");
1067
233cd282
JN
1068 /*
1069 * These underlying connection commands die() if they
2ac67cb6
JN
1070 * cannot connect.
1071 */
1072 if (git_use_proxy(hostandport))
1073 conn = git_proxy_connect(fd, hostandport);
1074 else
1075 conn = git_tcp_connect(fd, hostandport, flags);
1076 /*
1077 * Separate original protocol components prog and path
1078 * from extended host header with a NUL byte.
1079 *
1080 * Note: Do not add any other headers here! Doing so
1081 * will cause older git-daemon servers to crash.
1082 */
1083 strbuf_addf(&request,
1084 "%s %s%chost=%s%c",
1085 prog, path, 0,
1086 target_host, 0);
1087
1088 /* If using a new version put that stuff here after a second null byte */
40fc51e3 1089 if (version > 0) {
2ac67cb6
JN
1090 strbuf_addch(&request, '\0');
1091 strbuf_addf(&request, "version=%d%c",
40fc51e3 1092 version, '\0');
2ac67cb6
JN
1093 }
1094
1095 packet_write(fd[1], request.buf, request.len);
1096
1097 free(target_host);
1098 strbuf_release(&request);
1099 return conn;
1100}
1101
957e2ad2
JN
1102/*
1103 * Append the appropriate environment variables to `env` and options to
1104 * `args` for running ssh in Git's SSH-tunneled transport.
1105 */
1106static void push_ssh_options(struct argv_array *args, struct argv_array *env,
1107 enum ssh_variant variant, const char *port,
40fc51e3 1108 enum protocol_version version, int flags)
957e2ad2
JN
1109{
1110 if (variant == VARIANT_SSH &&
40fc51e3 1111 version > 0) {
957e2ad2
JN
1112 argv_array_push(args, "-o");
1113 argv_array_push(args, "SendEnv=" GIT_PROTOCOL_ENVIRONMENT);
1114 argv_array_pushf(env, GIT_PROTOCOL_ENVIRONMENT "=version=%d",
40fc51e3 1115 version);
957e2ad2
JN
1116 }
1117
a3f5b66f
JN
1118 if (flags & CONNECT_IPV4) {
1119 switch (variant) {
1120 case VARIANT_AUTO:
1121 BUG("VARIANT_AUTO passed to push_ssh_options");
1122 case VARIANT_SIMPLE:
aad6fddb 1123 die(_("ssh variant 'simple' does not support -4"));
a3f5b66f
JN
1124 case VARIANT_SSH:
1125 case VARIANT_PLINK:
1126 case VARIANT_PUTTY:
1127 case VARIANT_TORTOISEPLINK:
957e2ad2 1128 argv_array_push(args, "-4");
a3f5b66f
JN
1129 }
1130 } else if (flags & CONNECT_IPV6) {
1131 switch (variant) {
1132 case VARIANT_AUTO:
1133 BUG("VARIANT_AUTO passed to push_ssh_options");
1134 case VARIANT_SIMPLE:
aad6fddb 1135 die(_("ssh variant 'simple' does not support -6"));
a3f5b66f
JN
1136 case VARIANT_SSH:
1137 case VARIANT_PLINK:
1138 case VARIANT_PUTTY:
1139 case VARIANT_TORTOISEPLINK:
957e2ad2 1140 argv_array_push(args, "-6");
a3f5b66f 1141 }
957e2ad2
JN
1142 }
1143
1144 if (variant == VARIANT_TORTOISEPLINK)
1145 argv_array_push(args, "-batch");
1146
3fa5e0d0
JN
1147 if (port) {
1148 switch (variant) {
1149 case VARIANT_AUTO:
1150 BUG("VARIANT_AUTO passed to push_ssh_options");
1151 case VARIANT_SIMPLE:
aad6fddb 1152 die(_("ssh variant 'simple' does not support setting port"));
3fa5e0d0 1153 case VARIANT_SSH:
957e2ad2 1154 argv_array_push(args, "-p");
3fa5e0d0
JN
1155 break;
1156 case VARIANT_PLINK:
1157 case VARIANT_PUTTY:
1158 case VARIANT_TORTOISEPLINK:
957e2ad2 1159 argv_array_push(args, "-P");
3fa5e0d0 1160 }
957e2ad2
JN
1161
1162 argv_array_push(args, port);
1163 }
1164}
1165
fce54ce4
JN
1166/* Prepare a child_process for use by Git's SSH-tunneled transport. */
1167static void fill_ssh_args(struct child_process *conn, const char *ssh_host,
40fc51e3
BW
1168 const char *port, enum protocol_version version,
1169 int flags)
fce54ce4
JN
1170{
1171 const char *ssh;
1172 enum ssh_variant variant;
1173
1174 if (looks_like_command_line_option(ssh_host))
aad6fddb 1175 die(_("strange hostname '%s' blocked"), ssh_host);
fce54ce4
JN
1176
1177 ssh = get_ssh_command();
1178 if (ssh) {
1179 variant = determine_ssh_variant(ssh, 1);
1180 } else {
1181 /*
1182 * GIT_SSH is the no-shell version of
1183 * GIT_SSH_COMMAND (and must remain so for
1184 * historical compatibility).
1185 */
1186 conn->use_shell = 0;
1187
1188 ssh = getenv("GIT_SSH");
1189 if (!ssh)
1190 ssh = "ssh";
1191 variant = determine_ssh_variant(ssh, 0);
1192 }
1193
0da0e49b
JN
1194 if (variant == VARIANT_AUTO) {
1195 struct child_process detect = CHILD_PROCESS_INIT;
1196
1197 detect.use_shell = conn->use_shell;
1198 detect.no_stdin = detect.no_stdout = detect.no_stderr = 1;
1199
1200 argv_array_push(&detect.args, ssh);
1201 argv_array_push(&detect.args, "-G");
1202 push_ssh_options(&detect.args, &detect.env_array,
40fc51e3 1203 VARIANT_SSH, port, version, flags);
0da0e49b
JN
1204 argv_array_push(&detect.args, ssh_host);
1205
1206 variant = run_command(&detect) ? VARIANT_SIMPLE : VARIANT_SSH;
1207 }
1208
fce54ce4 1209 argv_array_push(&conn->args, ssh);
40fc51e3 1210 push_ssh_options(&conn->args, &conn->env_array, variant, port, version, flags);
fce54ce4
JN
1211 argv_array_push(&conn->args, ssh_host);
1212}
1213
cabc3c12 1214/*
8e349780
JN
1215 * This returns the dummy child_process `no_fork` if the transport protocol
1216 * does not need fork(2), or a struct child_process object if it does. Once
1217 * done, finish the connection with finish_connect() with the value returned
1218 * from this function (it is safe to call finish_connect() with NULL to
1219 * support the former case).
cabc3c12
JS
1220 *
1221 * If it returns, the connect is successful; it just dies on errors (this
1222 * will hopefully be changed in a libification effort, to return NULL when
1223 * the connection failed).
1224 */
1225struct child_process *git_connect(int fd[2], const char *url,
1226 const char *prog, int flags)
1227{
a2036d7e 1228 char *hostandport, *path;
8e349780 1229 struct child_process *conn;
cabc3c12 1230 enum protocol protocol;
40fc51e3 1231 enum protocol_version version = get_protocol_version_config();
cabc3c12 1232
1aa8dded
BW
1233 /*
1234 * NEEDSWORK: If we are trying to use protocol v2 and we are planning
1235 * to perform a push, then fallback to v0 since the client doesn't know
1236 * how to push yet using v2.
1237 */
1238 if (version == protocol_v2 && !strcmp("git-receive-pack", prog))
1239 version = protocol_v0;
1240
cabc3c12
JS
1241 /* Without this we cannot rely on waitpid() to tell
1242 * what happened to our children.
2e776665 1243 */
cabc3c12 1244 signal(SIGCHLD, SIG_DFL);
2e776665 1245
a2036d7e 1246 protocol = parse_connect_url(url, &hostandport, &path);
3f55ccab 1247 if ((flags & CONNECT_DIAG_URL) && (protocol != PROTO_SSH)) {
5610b7c0
TB
1248 printf("Diag: url=%s\n", url ? url : "NULL");
1249 printf("Diag: protocol=%s\n", prot_name(protocol));
a2036d7e 1250 printf("Diag: hostandport=%s\n", hostandport ? hostandport : "NULL");
5610b7c0 1251 printf("Diag: path=%s\n", path ? path : "NULL");
a2036d7e
TB
1252 conn = NULL;
1253 } else if (protocol == PROTO_GIT) {
40fc51e3 1254 conn = git_connect_git(fd, hostandport, path, prog, version, flags);
abd81a3d 1255 conn->trace2_child_class = "transport/git";
a2036d7e 1256 } else {
f1399291 1257 struct strbuf cmd = STRBUF_INIT;
0c2f0d27 1258 const char *const *var;
f1399291 1259
483bbd4e
RS
1260 conn = xmalloc(sizeof(*conn));
1261 child_process_init(conn);
a2036d7e 1262
aeeb2d49 1263 if (looks_like_command_line_option(path))
aad6fddb 1264 die(_("strange pathname '%s' blocked"), path);
aeeb2d49 1265
a2036d7e
TB
1266 strbuf_addstr(&cmd, prog);
1267 strbuf_addch(&cmd, ' ');
1268 sq_quote_buf(&cmd, path);
1269
aab40438 1270 /* remove repo-local variables from the environment */
0c2f0d27
BW
1271 for (var = local_repo_env; *var; var++)
1272 argv_array_push(&conn->env_array, *var);
1273
a48b409f 1274 conn->use_shell = 1;
a2036d7e 1275 conn->in = conn->out = -1;
a2036d7e 1276 if (protocol == PROTO_SSH) {
a2036d7e
TB
1277 char *ssh_host = hostandport;
1278 const char *port = NULL;
a5adaced 1279 transport_check_allowed("ssh");
a2036d7e 1280 get_host_and_port(&ssh_host, &port);
a2036d7e 1281
86ceb337
TB
1282 if (!port)
1283 port = get_port(ssh_host);
42da4840 1284
3f55ccab
TB
1285 if (flags & CONNECT_DIAG_URL) {
1286 printf("Diag: url=%s\n", url ? url : "NULL");
1287 printf("Diag: protocol=%s\n", prot_name(protocol));
1288 printf("Diag: userandhost=%s\n", ssh_host ? ssh_host : "NULL");
1289 printf("Diag: port=%s\n", port ? port : "NONE");
1290 printf("Diag: path=%s\n", path ? path : "NULL");
a2036d7e 1291
3f55ccab
TB
1292 free(hostandport);
1293 free(path);
04f20c04 1294 free(conn);
f1399291 1295 strbuf_release(&cmd);
3f55ccab 1296 return NULL;
37ee646e 1297 }
abd81a3d 1298 conn->trace2_child_class = "transport/ssh";
40fc51e3 1299 fill_ssh_args(conn, ssh_host, port, version, flags);
c049b61d 1300 } else {
a5adaced 1301 transport_check_allowed("file");
abd81a3d 1302 conn->trace2_child_class = "transport/file";
40fc51e3 1303 if (version > 0) {
0c2f0d27 1304 argv_array_pushf(&conn->env_array, GIT_PROTOCOL_ENVIRONMENT "=version=%d",
40fc51e3 1305 version);
0c2f0d27 1306 }
4852f723 1307 }
1823bea1 1308 argv_array_push(&conn->args, cmd.buf);
f364cb88 1309
a2036d7e 1310 if (start_command(conn))
aad6fddb 1311 die(_("unable to fork"));
f364cb88 1312
a2036d7e
TB
1313 fd[0] = conn->out; /* read from child's stdout */
1314 fd[1] = conn->in; /* write to child's stdin */
1315 strbuf_release(&cmd);
1316 }
1317 free(hostandport);
cabc3c12 1318 free(path);
98158e9c 1319 return conn;
f7192598
LT
1320}
1321
98158e9c 1322int finish_connect(struct child_process *conn)
f7192598 1323{
f364cb88 1324 int code;
7ffe853b 1325 if (!conn || git_connection_is_socket(conn))
f42a5c4e
FBH
1326 return 0;
1327
f364cb88 1328 code = finish_command(conn);
98158e9c 1329 free(conn);
f364cb88 1330 return code;
f7192598 1331}