sort_string_list(): rename to string_list_sort()
[git/git.git] / connect.c
CommitLineData
731043fd 1#include "git-compat-util.h"
f7192598 2#include "cache.h"
41cb7488 3#include "pkt-line.h"
b10d0ec7 4#include "quote.h"
6abf5c0c 5#include "refs.h"
15a1c012 6#include "run-command.h"
6b62816c 7#include "remote.h"
47a59185 8#include "connect.h"
9d2e9420 9#include "url.h"
a45b5f05 10#include "string-list.h"
13eb4626 11#include "sha1-array.h"
f7192598 12
96f1e58f 13static char *server_capabilities;
5d54cffc 14static const char *parse_feature_value(const char *, const char *, int *);
211b5f9e 15
be0b3f82 16static int check_ref(const char *name, unsigned int flags)
2718ff09
LT
17{
18 if (!flags)
19 return 1;
20
be0b3f82 21 if (!skip_prefix(name, "refs/", &name))
2718ff09
LT
22 return 0;
23
2718ff09 24 /* REF_NORMAL means that we don't want the magic fake tag refs */
8d9c5010 25 if ((flags & REF_NORMAL) && check_refname_format(name, 0))
2718ff09
LT
26 return 0;
27
28 /* REF_HEADS means that we want regular branch heads */
be0b3f82 29 if ((flags & REF_HEADS) && starts_with(name, "heads/"))
2718ff09
LT
30 return 1;
31
32 /* REF_TAGS means that we want tags */
be0b3f82 33 if ((flags & REF_TAGS) && starts_with(name, "tags/"))
2718ff09
LT
34 return 1;
35
36 /* All type bits clear means that we are ok with anything */
37 return !(flags & ~REF_NORMAL);
38}
39
4577370e
DB
40int check_ref_type(const struct ref *ref, int flags)
41{
be0b3f82 42 return check_ref(ref->name, flags);
4577370e
DB
43}
44
46284dd1
HV
45static void die_initial_contact(int got_at_least_one_head)
46{
47 if (got_at_least_one_head)
48 die("The remote end hung up upon initial contact");
49 else
50 die("Could not read from remote repository.\n\n"
51 "Please make sure you have the correct access rights\n"
52 "and the repository exists.");
53}
54
a45b5f05
JH
55static void parse_one_symref_info(struct string_list *symref, const char *val, int len)
56{
57 char *sym, *target;
58 struct string_list_item *item;
59
60 if (!len)
61 return; /* just "symref" */
62 /* e.g. "symref=HEAD:refs/heads/master" */
5c0b13f8 63 sym = xmemdupz(val, len);
a45b5f05
JH
64 target = strchr(sym, ':');
65 if (!target)
66 /* just "symref=something" */
67 goto reject;
68 *(target++) = '\0';
69 if (check_refname_format(sym, REFNAME_ALLOW_ONELEVEL) ||
70 check_refname_format(target, REFNAME_ALLOW_ONELEVEL))
71 /* "symref=bogus:pair */
72 goto reject;
73 item = string_list_append(symref, sym);
74 item->util = target;
75 return;
76reject:
77 free(sym);
78 return;
79}
80
81static void annotate_refs_with_symref_info(struct ref *ref)
82{
83 struct string_list symref = STRING_LIST_INIT_DUP;
84 const char *feature_list = server_capabilities;
85
86 while (feature_list) {
87 int len;
88 const char *val;
89
90 val = parse_feature_value(feature_list, "symref", &len);
91 if (!val)
92 break;
93 parse_one_symref_info(&symref, val, len);
94 feature_list = val + 1;
95 }
3383e199 96 string_list_sort(&symref);
a45b5f05
JH
97
98 for (; ref; ref = ref->next) {
99 struct string_list_item *item;
100 item = string_list_lookup(&symref, ref->name);
101 if (!item)
102 continue;
103 ref->symref = xstrdup((char *)item->util);
104 }
105 string_list_clear(&symref, 0);
106}
107
d1c133f5
LT
108/*
109 * Read all the refs from the other end
110 */
85edf4f5
JK
111struct ref **get_remote_heads(int in, char *src_buf, size_t src_len,
112 struct ref **list, unsigned int flags,
b06dcd7d
NTND
113 struct sha1_array *extra_have,
114 struct sha1_array *shallow_points)
d1c133f5 115{
a45b5f05 116 struct ref **orig_list = list;
46284dd1
HV
117 int got_at_least_one_head = 0;
118
d1c133f5
LT
119 *list = NULL;
120 for (;;) {
121 struct ref *ref;
122 unsigned char old_sha1[20];
d1c133f5 123 char *name;
211b5f9e 124 int len, name_len;
74543a04 125 char *buffer = packet_buffer;
ae021d87 126 const char *arg;
d1c133f5 127
85edf4f5 128 len = packet_read(in, &src_buf, &src_len,
4981fe75 129 packet_buffer, sizeof(packet_buffer),
819b929d
JK
130 PACKET_READ_GENTLE_ON_EOF |
131 PACKET_READ_CHOMP_NEWLINE);
46284dd1
HV
132 if (len < 0)
133 die_initial_contact(got_at_least_one_head);
134
d1c133f5
LT
135 if (!len)
136 break;
d1c133f5 137
ae021d87
JK
138 if (len > 4 && skip_prefix(buffer, "ERR ", &arg))
139 die("remote error: %s", arg);
a8073289 140
ae021d87
JK
141 if (len == 48 && skip_prefix(buffer, "shallow ", &arg)) {
142 if (get_sha1_hex(arg, old_sha1))
143 die("protocol error: expected shallow sha-1, got '%s'", arg);
b06dcd7d
NTND
144 if (!shallow_points)
145 die("repository on the other end cannot be shallow");
146 sha1_array_append(shallow_points, old_sha1);
147 continue;
148 }
149
d1c133f5
LT
150 if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ')
151 die("protocol error: expected sha/ref, got '%s'", buffer);
152 name = buffer + 41;
1a7141ff 153
211b5f9e
JS
154 name_len = strlen(name);
155 if (len != name_len + 41) {
8e0f7003 156 free(server_capabilities);
9befac47 157 server_capabilities = xstrdup(name + name_len + 1);
211b5f9e
JS
158 }
159
40c155ff
JH
160 if (extra_have &&
161 name_len == 5 && !memcmp(".have", name, 5)) {
13eb4626 162 sha1_array_append(extra_have, old_sha1);
40c155ff
JH
163 continue;
164 }
165
be0b3f82 166 if (!check_ref(name, flags))
cfee10a7 167 continue;
59c69c0c 168 ref = alloc_ref(buffer + 41);
e702496e 169 hashcpy(ref->old_sha1, old_sha1);
d1c133f5
LT
170 *list = ref;
171 list = &ref->next;
46284dd1 172 got_at_least_one_head = 1;
d1c133f5 173 }
a45b5f05
JH
174
175 annotate_refs_with_symref_info(*orig_list);
176
d1c133f5
LT
177 return list;
178}
179
5d54cffc 180static const char *parse_feature_value(const char *feature_list, const char *feature, int *lenp)
f47182c8
JH
181{
182 int len;
183
184 if (!feature_list)
185 return NULL;
186
187 len = strlen(feature);
188 while (*feature_list) {
189 const char *found = strstr(feature_list, feature);
190 if (!found)
191 return NULL;
94427108
JK
192 if (feature_list == found || isspace(found[-1])) {
193 const char *value = found + len;
194 /* feature with no value (e.g., "thin-pack") */
195 if (!*value || isspace(*value)) {
196 if (lenp)
197 *lenp = 0;
198 return value;
199 }
200 /* feature with a value (e.g., "agent=git/1.2.3") */
201 else if (*value == '=') {
202 value++;
203 if (lenp)
204 *lenp = strcspn(value, " \t\n");
205 return value;
206 }
207 /*
208 * otherwise we matched a substring of another feature;
209 * keep looking
210 */
211 }
f47182c8
JH
212 feature_list = found + 1;
213 }
214 return NULL;
211b5f9e
JS
215}
216
94427108
JK
217int parse_feature_request(const char *feature_list, const char *feature)
218{
219 return !!parse_feature_value(feature_list, feature, NULL);
220}
221
222const char *server_feature_value(const char *feature, int *len)
223{
224 return parse_feature_value(server_capabilities, feature, len);
225}
226
227int server_supports(const char *feature)
228{
229 return !!server_feature_value(feature, NULL);
230}
231
2386d658
LT
232enum protocol {
233 PROTO_LOCAL = 1,
c59ab2e5 234 PROTO_FILE,
2386d658 235 PROTO_SSH,
4b05548f 236 PROTO_GIT
2386d658
LT
237};
238
c59ab2e5
TB
239int url_is_local_not_ssh(const char *url)
240{
241 const char *colon = strchr(url, ':');
242 const char *slash = strchr(url, '/');
243 return !colon || (slash && slash < colon) ||
244 has_dos_drive_prefix(url);
245}
246
5610b7c0
TB
247static const char *prot_name(enum protocol protocol)
248{
249 switch (protocol) {
250 case PROTO_LOCAL:
c59ab2e5 251 case PROTO_FILE:
5610b7c0
TB
252 return "file";
253 case PROTO_SSH:
254 return "ssh";
255 case PROTO_GIT:
256 return "git";
257 default:
258 return "unkown protocol";
259 }
260}
261
2386d658
LT
262static enum protocol get_protocol(const char *name)
263{
264 if (!strcmp(name, "ssh"))
265 return PROTO_SSH;
266 if (!strcmp(name, "git"))
267 return PROTO_GIT;
c05186cc
LT
268 if (!strcmp(name, "git+ssh"))
269 return PROTO_SSH;
270 if (!strcmp(name, "ssh+git"))
271 return PROTO_SSH;
72a4f4b6 272 if (!strcmp(name, "file"))
c59ab2e5 273 return PROTO_FILE;
2386d658
LT
274 die("I don't handle protocol '%s'", name);
275}
276
5ba88448
YH
277#define STR_(s) # s
278#define STR(s) STR_(s)
2386d658 279
72a534da
ML
280static void get_host_and_port(char **host, const char **port)
281{
282 char *colon, *end;
283
284 if (*host[0] == '[') {
285 end = strchr(*host + 1, ']');
286 if (end) {
287 *end = 0;
288 end++;
289 (*host)++;
290 } else
291 end = *host;
292 } else
293 end = *host;
294 colon = strchr(end, ':');
295
296 if (colon) {
297 *colon = 0;
298 *port = colon + 1;
299 }
300}
301
e47a8583
EW
302static void enable_keepalive(int sockfd)
303{
304 int ka = 1;
305
306 if (setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, &ka, sizeof(ka)) < 0)
307 fprintf(stderr, "unable to set SO_KEEPALIVE on socket: %s\n",
308 strerror(errno));
309}
310
49744d63 311#ifndef NO_IPV6
4c505f71 312
ba505322
AR
313static const char *ai_name(const struct addrinfo *ai)
314{
785a9857
BK
315 static char addr[NI_MAXHOST];
316 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, addr, sizeof(addr), NULL, 0,
317 NI_NUMERICHOST) != 0)
ba505322 318 strcpy(addr, "(unknown)");
785a9857 319
ba505322
AR
320 return addr;
321}
322
5ad312be
JL
323/*
324 * Returns a connected socket() fd, or else die()s.
325 */
7841ce79 326static int git_tcp_connect_sock(char *host, int flags)
2386d658 327{
63a995b6
DZ
328 struct strbuf error_message = STRBUF_INIT;
329 int sockfd = -1;
554fe20d 330 const char *port = STR(DEFAULT_GIT_PORT);
5ba88448
YH
331 struct addrinfo hints, *ai0, *ai;
332 int gai;
ba505322 333 int cnt = 0;
5ba88448 334
72a534da
ML
335 get_host_and_port(&host, &port);
336 if (!*port)
337 port = "<none>";
5ba88448
YH
338
339 memset(&hints, 0, sizeof(hints));
340 hints.ai_socktype = SOCK_STREAM;
341 hints.ai_protocol = IPPROTO_TCP;
342
7841ce79
MT
343 if (flags & CONNECT_VERBOSE)
344 fprintf(stderr, "Looking up %s ... ", host);
345
5ba88448
YH
346 gai = getaddrinfo(host, port, &hints, &ai);
347 if (gai)
608d48b2 348 die("Unable to look up %s (port %s) (%s)", host, port, gai_strerror(gai));
5ba88448 349
7841ce79
MT
350 if (flags & CONNECT_VERBOSE)
351 fprintf(stderr, "done.\nConnecting to %s (port %s) ... ", host, port);
352
e08afecd 353 for (ai0 = ai; ai; ai = ai->ai_next, cnt++) {
5ad312be
JL
354 sockfd = socket(ai->ai_family,
355 ai->ai_socktype, ai->ai_protocol);
63a995b6
DZ
356 if ((sockfd < 0) ||
357 (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0)) {
358 strbuf_addf(&error_message, "%s[%d: %s]: errno=%s\n",
359 host, cnt, ai_name(ai), strerror(errno));
360 if (0 <= sockfd)
361 close(sockfd);
5ba88448
YH
362 sockfd = -1;
363 continue;
2386d658 364 }
ba505322
AR
365 if (flags & CONNECT_VERBOSE)
366 fprintf(stderr, "%s ", ai_name(ai));
5ba88448 367 break;
2386d658
LT
368 }
369
5ba88448 370 freeaddrinfo(ai0);
2386d658 371
2386d658 372 if (sockfd < 0)
63a995b6 373 die("unable to connect to %s:\n%s", host, error_message.buf);
5ba88448 374
e47a8583
EW
375 enable_keepalive(sockfd);
376
7841ce79
MT
377 if (flags & CONNECT_VERBOSE)
378 fprintf(stderr, "done.\n");
379
63a995b6
DZ
380 strbuf_release(&error_message);
381
5ad312be 382 return sockfd;
2386d658
LT
383}
384
49744d63 385#else /* NO_IPV6 */
4c505f71 386
5ad312be
JL
387/*
388 * Returns a connected socket() fd, or else die()s.
389 */
7841ce79 390static int git_tcp_connect_sock(char *host, int flags)
4c505f71 391{
7203a2d1
EFL
392 struct strbuf error_message = STRBUF_INIT;
393 int sockfd = -1;
72a534da
ML
394 const char *port = STR(DEFAULT_GIT_PORT);
395 char *ep;
4c505f71
PA
396 struct hostent *he;
397 struct sockaddr_in sa;
398 char **ap;
399 unsigned int nport;
ba505322 400 int cnt;
4c505f71 401
72a534da 402 get_host_and_port(&host, &port);
4c505f71 403
7841ce79
MT
404 if (flags & CONNECT_VERBOSE)
405 fprintf(stderr, "Looking up %s ... ", host);
406
4c505f71
PA
407 he = gethostbyname(host);
408 if (!he)
409 die("Unable to look up %s (%s)", host, hstrerror(h_errno));
410 nport = strtoul(port, &ep, 10);
411 if ( ep == port || *ep ) {
412 /* Not numeric */
413 struct servent *se = getservbyname(port,"tcp");
414 if ( !se )
d7530708 415 die("Unknown port %s", port);
4c505f71
PA
416 nport = se->s_port;
417 }
418
7841ce79
MT
419 if (flags & CONNECT_VERBOSE)
420 fprintf(stderr, "done.\nConnecting to %s (port %s) ... ", host, port);
421
ba505322 422 for (cnt = 0, ap = he->h_addr_list; *ap; ap++, cnt++) {
4c505f71
PA
423 memset(&sa, 0, sizeof sa);
424 sa.sin_family = he->h_addrtype;
6573faff 425 sa.sin_port = htons(nport);
c6164218 426 memcpy(&sa.sin_addr, *ap, he->h_length);
4c505f71 427
7203a2d1
EFL
428 sockfd = socket(he->h_addrtype, SOCK_STREAM, 0);
429 if ((sockfd < 0) ||
430 connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) {
431 strbuf_addf(&error_message, "%s[%d: %s]: errno=%s\n",
ba505322
AR
432 host,
433 cnt,
434 inet_ntoa(*(struct in_addr *)&sa.sin_addr),
7203a2d1
EFL
435 strerror(errno));
436 if (0 <= sockfd)
437 close(sockfd);
4c505f71
PA
438 sockfd = -1;
439 continue;
440 }
ba505322
AR
441 if (flags & CONNECT_VERBOSE)
442 fprintf(stderr, "%s ",
443 inet_ntoa(*(struct in_addr *)&sa.sin_addr));
4c505f71
PA
444 break;
445 }
446
447 if (sockfd < 0)
7203a2d1 448 die("unable to connect to %s:\n%s", host, error_message.buf);
4c505f71 449
e47a8583
EW
450 enable_keepalive(sockfd);
451
7841ce79
MT
452 if (flags & CONNECT_VERBOSE)
453 fprintf(stderr, "done.\n");
454
5ad312be
JL
455 return sockfd;
456}
457
458#endif /* NO_IPV6 */
459
460
7841ce79 461static void git_tcp_connect(int fd[2], char *host, int flags)
5ad312be 462{
7841ce79 463 int sockfd = git_tcp_connect_sock(host, flags);
5ad312be 464
4c505f71 465 fd[0] = sockfd;
ec587fde 466 fd[1] = dup(sockfd);
4c505f71
PA
467}
468
4c505f71 469
96f1e58f 470static char *git_proxy_command;
f8014776 471
ef90d6d4
JS
472static int git_proxy_command_options(const char *var, const char *value,
473 void *cb)
f8014776 474{
e814bc4d 475 if (!strcmp(var, "core.gitproxy")) {
c3df8568
YH
476 const char *for_pos;
477 int matchlen = -1;
478 int hostlen;
15112c95
EFL
479 const char *rhost_name = cb;
480 int rhost_len = strlen(rhost_name);
c3df8568 481
e814bc4d 482 if (git_proxy_command)
f8014776 483 return 0;
c64b9ad0
JH
484 if (!value)
485 return config_error_nonbool(var);
e814bc4d
JH
486 /* [core]
487 * ;# matches www.kernel.org as well
488 * gitproxy = netcatter-1 for kernel.org
489 * gitproxy = netcatter-2 for sample.xz
490 * gitproxy = netcatter-default
491 */
c3df8568 492 for_pos = strstr(value, " for ");
e814bc4d
JH
493 if (!for_pos)
494 /* matches everybody */
495 matchlen = strlen(value);
496 else {
497 hostlen = strlen(for_pos + 5);
498 if (rhost_len < hostlen)
499 matchlen = -1;
500 else if (!strncmp(for_pos + 5,
501 rhost_name + rhost_len - hostlen,
502 hostlen) &&
503 ((rhost_len == hostlen) ||
504 rhost_name[rhost_len - hostlen -1] == '.'))
505 matchlen = for_pos - value;
506 else
507 matchlen = -1;
508 }
509 if (0 <= matchlen) {
510 /* core.gitproxy = none for kernel.org */
a6080a0a 511 if (matchlen == 4 &&
e814bc4d
JH
512 !memcmp(value, "none", 4))
513 matchlen = 0;
182af834 514 git_proxy_command = xmemdupz(value, matchlen);
f8014776 515 }
e814bc4d 516 return 0;
f8014776
PC
517 }
518
ef90d6d4 519 return git_default_config(var, value, cb);
f8014776
PC
520}
521
e814bc4d 522static int git_use_proxy(const char *host)
f8014776
PC
523{
524 git_proxy_command = getenv("GIT_PROXY_COMMAND");
15112c95 525 git_config(git_proxy_command_options, (void*)host);
e814bc4d 526 return (git_proxy_command && *git_proxy_command);
f8014776
PC
527}
528
5cbf8246 529static struct child_process *git_proxy_connect(int fd[2], char *host)
f8014776 530{
554fe20d 531 const char *port = STR(DEFAULT_GIT_PORT);
5cbf8246 532 struct child_process *proxy;
f8014776 533
72a534da 534 get_host_and_port(&host, &port);
f8014776 535
483bbd4e
RS
536 proxy = xmalloc(sizeof(*proxy));
537 child_process_init(proxy);
1823bea1
JK
538 argv_array_push(&proxy->args, git_proxy_command);
539 argv_array_push(&proxy->args, host);
540 argv_array_push(&proxy->args, port);
5cbf8246
JK
541 proxy->in = -1;
542 proxy->out = -1;
543 if (start_command(proxy))
1823bea1 544 die("cannot start proxy %s", git_proxy_command);
5cbf8246
JK
545 fd[0] = proxy->out; /* read from proxy stdout */
546 fd[1] = proxy->in; /* write to proxy stdin */
547 return proxy;
f8014776
PC
548}
549
83b05875 550static const char *get_port_numeric(const char *p)
2e776665
LT
551{
552 char *end;
2e776665 553 if (p) {
8f148253
RS
554 long port = strtol(p + 1, &end, 10);
555 if (end != p + 1 && *end == '\0' && 0 <= port && port < 65536) {
83b05875 556 return p;
2e776665
LT
557 }
558 }
559
560 return NULL;
561}
562
f7192598 563/*
cabc3c12
JS
564 * Extract protocol and relevant parts from the specified connection URL.
565 * The caller must free() the returned strings.
f7192598 566 */
cabc3c12 567static enum protocol parse_connect_url(const char *url_orig, char **ret_host,
83b05875 568 char **ret_path)
f7192598 569{
9d2e9420 570 char *url;
8e76bf3f 571 char *host, *path;
356bece0 572 char *end;
c59ab2e5 573 int separator = '/';
faea9ccb 574 enum protocol protocol = PROTO_LOCAL;
f0b7367c 575
9d2e9420
JK
576 if (is_url(url_orig))
577 url = url_decode(url_orig);
578 else
579 url = xstrdup(url_orig);
580
faea9ccb 581 host = strstr(url, "://");
eeefa7c9 582 if (host) {
faea9ccb
AE
583 *host = '\0';
584 protocol = get_protocol(url);
585 host += 3;
356bece0 586 } else {
f7192598 587 host = url;
c59ab2e5
TB
588 if (!url_is_local_not_ssh(url)) {
589 protocol = PROTO_SSH;
590 separator = ':';
591 }
356bece0
YH
592 }
593
9aa5053d 594 /*
83b05875
TB
595 * Don't do destructive transforms as protocol code does
596 * '[]' unwrapping in get_host_and_port()
9aa5053d 597 */
356bece0
YH
598 if (host[0] == '[') {
599 end = strchr(host + 1, ']');
600 if (end) {
356bece0 601 end++;
356bece0
YH
602 } else
603 end = host;
604 } else
605 end = host;
606
c59ab2e5 607 if (protocol == PROTO_LOCAL)
72a4f4b6 608 path = end;
c59ab2e5
TB
609 else if (protocol == PROTO_FILE && has_dos_drive_prefix(end))
610 path = end; /* "file://$(pwd)" may be "file://C:/projects/repo" */
611 else
612 path = strchr(end, separator);
2386d658 613
faea9ccb
AE
614 if (!path || !*path)
615 die("No path specified. See 'man git-pull' for valid url syntax");
616
617 /*
618 * null-terminate hostname and point path to ~ for URL's like this:
619 * ssh://host.xz/~user/repo
620 */
c59ab2e5
TB
621
622 end = path; /* Need to \0 terminate host here */
623 if (separator == ':')
624 path++; /* path starts after ':' */
625 if (protocol == PROTO_GIT || protocol == PROTO_SSH) {
faea9ccb
AE
626 if (path[1] == '~')
627 path++;
faea9ccb
AE
628 }
629
c59ab2e5
TB
630 path = xstrdup(path);
631 *end = '\0';
632
cabc3c12 633 *ret_host = xstrdup(host);
c59ab2e5 634 *ret_path = path;
cabc3c12
JS
635 free(url);
636 return protocol;
637}
638
d3180279 639static struct child_process no_fork = CHILD_PROCESS_INIT;
cabc3c12
JS
640
641/*
642 * This returns a dummy child_process if the transport protocol does not
643 * need fork(2), or a struct child_process object if it does. Once done,
644 * finish the connection with finish_connect() with the value returned from
645 * this function (it is safe to call finish_connect() with NULL to support
646 * the former case).
647 *
648 * If it returns, the connect is successful; it just dies on errors (this
649 * will hopefully be changed in a libification effort, to return NULL when
650 * the connection failed).
651 */
652struct child_process *git_connect(int fd[2], const char *url,
653 const char *prog, int flags)
654{
a2036d7e 655 char *hostandport, *path;
cabc3c12
JS
656 struct child_process *conn = &no_fork;
657 enum protocol protocol;
cabc3c12
JS
658 struct strbuf cmd = STRBUF_INIT;
659
660 /* Without this we cannot rely on waitpid() to tell
661 * what happened to our children.
2e776665 662 */
cabc3c12 663 signal(SIGCHLD, SIG_DFL);
2e776665 664
a2036d7e 665 protocol = parse_connect_url(url, &hostandport, &path);
5610b7c0
TB
666 if (flags & CONNECT_DIAG_URL) {
667 printf("Diag: url=%s\n", url ? url : "NULL");
668 printf("Diag: protocol=%s\n", prot_name(protocol));
a2036d7e 669 printf("Diag: hostandport=%s\n", hostandport ? hostandport : "NULL");
5610b7c0 670 printf("Diag: path=%s\n", path ? path : "NULL");
a2036d7e
TB
671 conn = NULL;
672 } else if (protocol == PROTO_GIT) {
5ad312be
JL
673 /* These underlying connection commands die() if they
674 * cannot connect.
675 */
a2036d7e
TB
676 char *target_host = xstrdup(hostandport);
677 if (git_use_proxy(hostandport))
678 conn = git_proxy_connect(fd, hostandport);
da2a95b2 679 else
a2036d7e 680 git_tcp_connect(fd, hostandport, flags);
5ad312be
JL
681 /*
682 * Separate original protocol components prog and path
73bb33a9
SP
683 * from extended host header with a NUL byte.
684 *
685 * Note: Do not add any other headers here! Doing so
686 * will cause older git-daemon servers to crash.
5ad312be
JL
687 */
688 packet_write(fd[1],
689 "%s %s%chost=%s%c",
690 prog, path, 0,
691 target_host, 0);
692 free(target_host);
a2036d7e 693 } else {
483bbd4e
RS
694 conn = xmalloc(sizeof(*conn));
695 child_process_init(conn);
a2036d7e
TB
696
697 strbuf_addstr(&cmd, prog);
698 strbuf_addch(&cmd, ' ');
699 sq_quote_buf(&cmd, path);
700
701 conn->in = conn->out = -1;
a2036d7e
TB
702 if (protocol == PROTO_SSH) {
703 const char *ssh = getenv("GIT_SSH");
704 int putty = ssh && strcasestr(ssh, "plink");
705 char *ssh_host = hostandport;
706 const char *port = NULL;
707 get_host_and_port(&ssh_host, &port);
708 port = get_port_numeric(port);
709
710 if (!ssh) ssh = "ssh";
711
1823bea1 712 argv_array_push(&conn->args, ssh);
a2036d7e 713 if (putty && !strcasestr(ssh, "tortoiseplink"))
1823bea1 714 argv_array_push(&conn->args, "-batch");
a2036d7e
TB
715 if (port) {
716 /* P is for PuTTY, p is for OpenSSH */
1823bea1
JK
717 argv_array_push(&conn->args, putty ? "-P" : "-p");
718 argv_array_push(&conn->args, port);
a2036d7e 719 }
1823bea1 720 argv_array_push(&conn->args, ssh_host);
c049b61d 721 } else {
a2036d7e
TB
722 /* remove repo-local variables from the environment */
723 conn->env = local_repo_env;
724 conn->use_shell = 1;
4852f723 725 }
1823bea1 726 argv_array_push(&conn->args, cmd.buf);
f364cb88 727
a2036d7e
TB
728 if (start_command(conn))
729 die("unable to fork");
f364cb88 730
a2036d7e
TB
731 fd[0] = conn->out; /* read from child's stdout */
732 fd[1] = conn->in; /* write to child's stdin */
733 strbuf_release(&cmd);
734 }
735 free(hostandport);
cabc3c12 736 free(path);
98158e9c 737 return conn;
f7192598
LT
738}
739
7ffe853b
JK
740int git_connection_is_socket(struct child_process *conn)
741{
742 return conn == &no_fork;
743}
744
98158e9c 745int finish_connect(struct child_process *conn)
f7192598 746{
f364cb88 747 int code;
7ffe853b 748 if (!conn || git_connection_is_socket(conn))
f42a5c4e
FBH
749 return 0;
750
f364cb88 751 code = finish_command(conn);
98158e9c 752 free(conn);
f364cb88 753 return code;
f7192598 754}