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Commit | Line | Data |
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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" |
f7192598 | 7 | |
96f1e58f | 8 | static char *server_capabilities; |
211b5f9e | 9 | |
2718ff09 LT |
10 | static int check_ref(const char *name, int len, unsigned int flags) |
11 | { | |
12 | if (!flags) | |
13 | return 1; | |
14 | ||
c41e20b3 | 15 | if (len < 5 || memcmp(name, "refs/", 5)) |
2718ff09 LT |
16 | return 0; |
17 | ||
18 | /* Skip the "refs/" part */ | |
19 | name += 5; | |
20 | len -= 5; | |
21 | ||
22 | /* REF_NORMAL means that we don't want the magic fake tag refs */ | |
23 | if ((flags & REF_NORMAL) && check_ref_format(name) < 0) | |
24 | return 0; | |
25 | ||
26 | /* REF_HEADS means that we want regular branch heads */ | |
27 | if ((flags & REF_HEADS) && !memcmp(name, "heads/", 6)) | |
28 | return 1; | |
29 | ||
30 | /* REF_TAGS means that we want tags */ | |
31 | if ((flags & REF_TAGS) && !memcmp(name, "tags/", 5)) | |
32 | return 1; | |
33 | ||
34 | /* All type bits clear means that we are ok with anything */ | |
35 | return !(flags & ~REF_NORMAL); | |
36 | } | |
37 | ||
d1c133f5 LT |
38 | /* |
39 | * Read all the refs from the other end | |
40 | */ | |
1a7141ff | 41 | struct ref **get_remote_heads(int in, struct ref **list, |
2718ff09 LT |
42 | int nr_match, char **match, |
43 | unsigned int flags) | |
d1c133f5 LT |
44 | { |
45 | *list = NULL; | |
46 | for (;;) { | |
47 | struct ref *ref; | |
48 | unsigned char old_sha1[20]; | |
49 | static char buffer[1000]; | |
50 | char *name; | |
211b5f9e | 51 | int len, name_len; |
d1c133f5 LT |
52 | |
53 | len = packet_read_line(in, buffer, sizeof(buffer)); | |
54 | if (!len) | |
55 | break; | |
56 | if (buffer[len-1] == '\n') | |
57 | buffer[--len] = 0; | |
58 | ||
59 | if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ') | |
60 | die("protocol error: expected sha/ref, got '%s'", buffer); | |
61 | name = buffer + 41; | |
1a7141ff | 62 | |
211b5f9e JS |
63 | name_len = strlen(name); |
64 | if (len != name_len + 41) { | |
65 | if (server_capabilities) | |
66 | free(server_capabilities); | |
9befac47 | 67 | server_capabilities = xstrdup(name + name_len + 1); |
211b5f9e JS |
68 | } |
69 | ||
2718ff09 | 70 | if (!check_ref(name, name_len, flags)) |
cfee10a7 | 71 | continue; |
d1c133f5 LT |
72 | if (nr_match && !path_match(name, nr_match, match)) |
73 | continue; | |
f88395ac | 74 | ref = xcalloc(1, sizeof(*ref) + len - 40); |
e702496e | 75 | hashcpy(ref->old_sha1, old_sha1); |
d1c133f5 | 76 | memcpy(ref->name, buffer + 41, len - 40); |
d1c133f5 LT |
77 | *list = ref; |
78 | list = &ref->next; | |
79 | } | |
80 | return list; | |
81 | } | |
82 | ||
211b5f9e JS |
83 | int server_supports(const char *feature) |
84 | { | |
1f5881bb JS |
85 | return server_capabilities && |
86 | strstr(server_capabilities, feature) != NULL; | |
211b5f9e JS |
87 | } |
88 | ||
41cb7488 LT |
89 | int get_ack(int fd, unsigned char *result_sha1) |
90 | { | |
91 | static char line[1000]; | |
92 | int len = packet_read_line(fd, line, sizeof(line)); | |
93 | ||
94 | if (!len) | |
95 | die("git-fetch-pack: expected ACK/NAK, got EOF"); | |
96 | if (line[len-1] == '\n') | |
97 | line[--len] = 0; | |
98 | if (!strcmp(line, "NAK")) | |
99 | return 0; | |
cc44c765 | 100 | if (!prefixcmp(line, "ACK ")) { |
c4c86f07 JS |
101 | if (!get_sha1_hex(line+4, result_sha1)) { |
102 | if (strstr(line+45, "continue")) | |
103 | return 2; | |
41cb7488 | 104 | return 1; |
c4c86f07 | 105 | } |
41cb7488 LT |
106 | } |
107 | die("git-fetch_pack: expected ACK/NAK, got '%s'", line); | |
108 | } | |
109 | ||
013e7c7f LT |
110 | int path_match(const char *path, int nr, char **match) |
111 | { | |
112 | int i; | |
113 | int pathlen = strlen(path); | |
114 | ||
115 | for (i = 0; i < nr; i++) { | |
116 | char *s = match[i]; | |
117 | int len = strlen(s); | |
118 | ||
119 | if (!len || len > pathlen) | |
120 | continue; | |
121 | if (memcmp(path + pathlen - len, s, len)) | |
122 | continue; | |
123 | if (pathlen > len && path[pathlen - len - 1] != '/') | |
124 | continue; | |
125 | *s = 0; | |
9546010b | 126 | return (i + 1); |
013e7c7f LT |
127 | } |
128 | return 0; | |
129 | } | |
130 | ||
f88395ac JH |
131 | struct refspec { |
132 | char *src; | |
133 | char *dst; | |
ff27adf3 | 134 | char force; |
f88395ac JH |
135 | }; |
136 | ||
ff27adf3 JH |
137 | /* |
138 | * A:B means fast forward remote B with local A. | |
139 | * +A:B means overwrite remote B with local A. | |
140 | * +A is a shorthand for +A:A. | |
141 | * A is a shorthand for A:A. | |
d4f694ba | 142 | * :B means delete remote B. |
ff27adf3 | 143 | */ |
f88395ac JH |
144 | static struct refspec *parse_ref_spec(int nr_refspec, char **refspec) |
145 | { | |
146 | int i; | |
ff27adf3 | 147 | struct refspec *rs = xcalloc(sizeof(*rs), (nr_refspec + 1)); |
f88395ac JH |
148 | for (i = 0; i < nr_refspec; i++) { |
149 | char *sp, *dp, *ep; | |
150 | sp = refspec[i]; | |
ff27adf3 JH |
151 | if (*sp == '+') { |
152 | rs[i].force = 1; | |
153 | sp++; | |
154 | } | |
f88395ac JH |
155 | ep = strchr(sp, ':'); |
156 | if (ep) { | |
157 | dp = ep + 1; | |
158 | *ep = 0; | |
159 | } | |
160 | else | |
161 | dp = sp; | |
162 | rs[i].src = sp; | |
163 | rs[i].dst = dp; | |
164 | } | |
165 | rs[nr_refspec].src = rs[nr_refspec].dst = NULL; | |
166 | return rs; | |
167 | } | |
168 | ||
169 | static int count_refspec_match(const char *pattern, | |
170 | struct ref *refs, | |
171 | struct ref **matched_ref) | |
172 | { | |
f88395ac | 173 | int patlen = strlen(pattern); |
29561ad0 JH |
174 | struct ref *matched_weak = NULL; |
175 | struct ref *matched = NULL; | |
176 | int weak_match = 0; | |
177 | int match = 0; | |
f88395ac | 178 | |
29561ad0 | 179 | for (weak_match = match = 0; refs; refs = refs->next) { |
f88395ac JH |
180 | char *name = refs->name; |
181 | int namelen = strlen(name); | |
29561ad0 JH |
182 | int weak_match; |
183 | ||
f88395ac JH |
184 | if (namelen < patlen || |
185 | memcmp(name + namelen - patlen, pattern, patlen)) | |
186 | continue; | |
187 | if (namelen != patlen && name[namelen - patlen - 1] != '/') | |
188 | continue; | |
29561ad0 JH |
189 | |
190 | /* A match is "weak" if it is with refs outside | |
191 | * heads or tags, and did not specify the pattern | |
192 | * in full (e.g. "refs/remotes/origin/master") or at | |
193 | * least from the toplevel (e.g. "remotes/origin/master"); | |
194 | * otherwise "git push $URL master" would result in | |
195 | * ambiguity between remotes/origin/master and heads/master | |
196 | * at the remote site. | |
197 | */ | |
198 | if (namelen != patlen && | |
199 | patlen != namelen - 5 && | |
cc44c765 JH |
200 | prefixcmp(name, "refs/heads/") && |
201 | prefixcmp(name, "refs/tags/")) { | |
29561ad0 JH |
202 | /* We want to catch the case where only weak |
203 | * matches are found and there are multiple | |
204 | * matches, and where more than one strong | |
205 | * matches are found, as ambiguous. One | |
206 | * strong match with zero or more weak matches | |
207 | * are acceptable as a unique match. | |
208 | */ | |
209 | matched_weak = refs; | |
210 | weak_match++; | |
211 | } | |
212 | else { | |
213 | matched = refs; | |
214 | match++; | |
215 | } | |
216 | } | |
217 | if (!matched) { | |
218 | *matched_ref = matched_weak; | |
219 | return weak_match; | |
220 | } | |
221 | else { | |
222 | *matched_ref = matched; | |
223 | return match; | |
f88395ac | 224 | } |
f88395ac JH |
225 | } |
226 | ||
227 | static void link_dst_tail(struct ref *ref, struct ref ***tail) | |
228 | { | |
229 | **tail = ref; | |
230 | *tail = &ref->next; | |
231 | **tail = NULL; | |
232 | } | |
233 | ||
15e02b37 JH |
234 | static struct ref *try_explicit_object_name(const char *name) |
235 | { | |
236 | unsigned char sha1[20]; | |
237 | struct ref *ref; | |
238 | int len; | |
d4f694ba JH |
239 | |
240 | if (!*name) { | |
241 | ref = xcalloc(1, sizeof(*ref) + 20); | |
242 | strcpy(ref->name, "(delete)"); | |
243 | hashclr(ref->new_sha1); | |
244 | return ref; | |
245 | } | |
15e02b37 JH |
246 | if (get_sha1(name, sha1)) |
247 | return NULL; | |
248 | len = strlen(name) + 1; | |
249 | ref = xcalloc(1, sizeof(*ref) + len); | |
250 | memcpy(ref->name, name, len); | |
e702496e | 251 | hashcpy(ref->new_sha1, sha1); |
15e02b37 JH |
252 | return ref; |
253 | } | |
254 | ||
f88395ac JH |
255 | static int match_explicit_refs(struct ref *src, struct ref *dst, |
256 | struct ref ***dst_tail, struct refspec *rs) | |
257 | { | |
258 | int i, errs; | |
259 | for (i = errs = 0; rs[i].src; i++) { | |
260 | struct ref *matched_src, *matched_dst; | |
261 | ||
262 | matched_src = matched_dst = NULL; | |
263 | switch (count_refspec_match(rs[i].src, src, &matched_src)) { | |
264 | case 1: | |
265 | break; | |
266 | case 0: | |
15e02b37 | 267 | /* The source could be in the get_sha1() format |
d4f694ba JH |
268 | * not a reference name. :refs/other is a |
269 | * way to delete 'other' ref at the remote end. | |
15e02b37 JH |
270 | */ |
271 | matched_src = try_explicit_object_name(rs[i].src); | |
272 | if (matched_src) | |
273 | break; | |
f88395ac | 274 | errs = 1; |
4ec99bf0 TS |
275 | error("src refspec %s does not match any.", |
276 | rs[i].src); | |
f88395ac JH |
277 | break; |
278 | default: | |
279 | errs = 1; | |
280 | error("src refspec %s matches more than one.", | |
281 | rs[i].src); | |
282 | break; | |
283 | } | |
284 | switch (count_refspec_match(rs[i].dst, dst, &matched_dst)) { | |
285 | case 1: | |
286 | break; | |
287 | case 0: | |
288 | if (!memcmp(rs[i].dst, "refs/", 5)) { | |
289 | int len = strlen(rs[i].dst) + 1; | |
290 | matched_dst = xcalloc(1, sizeof(*dst) + len); | |
291 | memcpy(matched_dst->name, rs[i].dst, len); | |
292 | link_dst_tail(matched_dst, dst_tail); | |
293 | } | |
294 | else if (!strcmp(rs[i].src, rs[i].dst) && | |
295 | matched_src) { | |
296 | /* pushing "master:master" when | |
297 | * remote does not have master yet. | |
298 | */ | |
4fa1604f | 299 | int len = strlen(matched_src->name) + 1; |
f88395ac JH |
300 | matched_dst = xcalloc(1, sizeof(*dst) + len); |
301 | memcpy(matched_dst->name, matched_src->name, | |
302 | len); | |
303 | link_dst_tail(matched_dst, dst_tail); | |
304 | } | |
305 | else { | |
306 | errs = 1; | |
307 | error("dst refspec %s does not match any " | |
308 | "existing ref on the remote and does " | |
309 | "not start with refs/.", rs[i].dst); | |
310 | } | |
311 | break; | |
312 | default: | |
313 | errs = 1; | |
314 | error("dst refspec %s matches more than one.", | |
315 | rs[i].dst); | |
316 | break; | |
317 | } | |
318 | if (errs) | |
319 | continue; | |
f88395ac JH |
320 | if (matched_dst->peer_ref) { |
321 | errs = 1; | |
322 | error("dst ref %s receives from more than one src.", | |
323 | matched_dst->name); | |
324 | } | |
ff27adf3 | 325 | else { |
f88395ac | 326 | matched_dst->peer_ref = matched_src; |
ff27adf3 JH |
327 | matched_dst->force = rs[i].force; |
328 | } | |
f88395ac JH |
329 | } |
330 | return -errs; | |
331 | } | |
332 | ||
333 | static struct ref *find_ref_by_name(struct ref *list, const char *name) | |
334 | { | |
335 | for ( ; list; list = list->next) | |
336 | if (!strcmp(list->name, name)) | |
337 | return list; | |
338 | return NULL; | |
339 | } | |
340 | ||
341 | int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail, | |
342 | int nr_refspec, char **refspec, int all) | |
343 | { | |
344 | struct refspec *rs = parse_ref_spec(nr_refspec, refspec); | |
345 | ||
346 | if (nr_refspec) | |
347 | return match_explicit_refs(src, dst, dst_tail, rs); | |
348 | ||
349 | /* pick the remainder */ | |
350 | for ( ; src; src = src->next) { | |
351 | struct ref *dst_peer; | |
352 | if (src->peer_ref) | |
353 | continue; | |
354 | dst_peer = find_ref_by_name(dst, src->name); | |
635d37af | 355 | if ((dst_peer && dst_peer->peer_ref) || (!dst_peer && !all)) |
f88395ac JH |
356 | continue; |
357 | if (!dst_peer) { | |
f88395ac JH |
358 | /* Create a new one and link it */ |
359 | int len = strlen(src->name) + 1; | |
360 | dst_peer = xcalloc(1, sizeof(*dst_peer) + len); | |
361 | memcpy(dst_peer->name, src->name, len); | |
e702496e | 362 | hashcpy(dst_peer->new_sha1, src->new_sha1); |
f88395ac JH |
363 | link_dst_tail(dst_peer, dst_tail); |
364 | } | |
365 | dst_peer->peer_ref = src; | |
366 | } | |
367 | return 0; | |
368 | } | |
369 | ||
2386d658 LT |
370 | enum protocol { |
371 | PROTO_LOCAL = 1, | |
372 | PROTO_SSH, | |
373 | PROTO_GIT, | |
374 | }; | |
375 | ||
376 | static enum protocol get_protocol(const char *name) | |
377 | { | |
378 | if (!strcmp(name, "ssh")) | |
379 | return PROTO_SSH; | |
380 | if (!strcmp(name, "git")) | |
381 | return PROTO_GIT; | |
c05186cc LT |
382 | if (!strcmp(name, "git+ssh")) |
383 | return PROTO_SSH; | |
384 | if (!strcmp(name, "ssh+git")) | |
385 | return PROTO_SSH; | |
2386d658 LT |
386 | die("I don't handle protocol '%s'", name); |
387 | } | |
388 | ||
5ba88448 YH |
389 | #define STR_(s) # s |
390 | #define STR(s) STR_(s) | |
2386d658 | 391 | |
49744d63 | 392 | #ifndef NO_IPV6 |
4c505f71 | 393 | |
5ad312be JL |
394 | /* |
395 | * Returns a connected socket() fd, or else die()s. | |
396 | */ | |
397 | static int git_tcp_connect_sock(char *host) | |
2386d658 | 398 | { |
ac3bc6c1 | 399 | int sockfd = -1, saved_errno = 0; |
5ba88448 | 400 | char *colon, *end; |
554fe20d | 401 | const char *port = STR(DEFAULT_GIT_PORT); |
5ba88448 YH |
402 | struct addrinfo hints, *ai0, *ai; |
403 | int gai; | |
404 | ||
405 | if (host[0] == '[') { | |
406 | end = strchr(host + 1, ']'); | |
407 | if (end) { | |
408 | *end = 0; | |
409 | end++; | |
410 | host++; | |
411 | } else | |
412 | end = host; | |
413 | } else | |
414 | end = host; | |
415 | colon = strchr(end, ':'); | |
416 | ||
ce6f8e7e LT |
417 | if (colon) { |
418 | *colon = 0; | |
5ba88448 | 419 | port = colon + 1; |
608d48b2 LT |
420 | if (!*port) |
421 | port = "<none>"; | |
ce6f8e7e | 422 | } |
5ba88448 YH |
423 | |
424 | memset(&hints, 0, sizeof(hints)); | |
425 | hints.ai_socktype = SOCK_STREAM; | |
426 | hints.ai_protocol = IPPROTO_TCP; | |
427 | ||
428 | gai = getaddrinfo(host, port, &hints, &ai); | |
429 | if (gai) | |
608d48b2 | 430 | die("Unable to look up %s (port %s) (%s)", host, port, gai_strerror(gai)); |
5ba88448 YH |
431 | |
432 | for (ai0 = ai; ai; ai = ai->ai_next) { | |
5ad312be JL |
433 | sockfd = socket(ai->ai_family, |
434 | ai->ai_socktype, ai->ai_protocol); | |
ac3bc6c1 PB |
435 | if (sockfd < 0) { |
436 | saved_errno = errno; | |
5ba88448 | 437 | continue; |
ac3bc6c1 | 438 | } |
5ba88448 | 439 | if (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) { |
ac3bc6c1 | 440 | saved_errno = errno; |
5ba88448 YH |
441 | close(sockfd); |
442 | sockfd = -1; | |
443 | continue; | |
2386d658 | 444 | } |
5ba88448 | 445 | break; |
2386d658 LT |
446 | } |
447 | ||
5ba88448 | 448 | freeaddrinfo(ai0); |
2386d658 | 449 | |
2386d658 | 450 | if (sockfd < 0) |
ac3bc6c1 | 451 | die("unable to connect a socket (%s)", strerror(saved_errno)); |
5ba88448 | 452 | |
5ad312be | 453 | return sockfd; |
2386d658 LT |
454 | } |
455 | ||
49744d63 | 456 | #else /* NO_IPV6 */ |
4c505f71 | 457 | |
5ad312be JL |
458 | /* |
459 | * Returns a connected socket() fd, or else die()s. | |
460 | */ | |
461 | static int git_tcp_connect_sock(char *host) | |
4c505f71 | 462 | { |
ac3bc6c1 | 463 | int sockfd = -1, saved_errno = 0; |
4c505f71 PA |
464 | char *colon, *end; |
465 | char *port = STR(DEFAULT_GIT_PORT), *ep; | |
466 | struct hostent *he; | |
467 | struct sockaddr_in sa; | |
468 | char **ap; | |
469 | unsigned int nport; | |
470 | ||
471 | if (host[0] == '[') { | |
472 | end = strchr(host + 1, ']'); | |
473 | if (end) { | |
474 | *end = 0; | |
475 | end++; | |
476 | host++; | |
477 | } else | |
478 | end = host; | |
479 | } else | |
480 | end = host; | |
481 | colon = strchr(end, ':'); | |
482 | ||
483 | if (colon) { | |
484 | *colon = 0; | |
485 | port = colon + 1; | |
486 | } | |
487 | ||
4c505f71 PA |
488 | he = gethostbyname(host); |
489 | if (!he) | |
490 | die("Unable to look up %s (%s)", host, hstrerror(h_errno)); | |
491 | nport = strtoul(port, &ep, 10); | |
492 | if ( ep == port || *ep ) { | |
493 | /* Not numeric */ | |
494 | struct servent *se = getservbyname(port,"tcp"); | |
495 | if ( !se ) | |
496 | die("Unknown port %s\n", port); | |
497 | nport = se->s_port; | |
498 | } | |
499 | ||
500 | for (ap = he->h_addr_list; *ap; ap++) { | |
501 | sockfd = socket(he->h_addrtype, SOCK_STREAM, 0); | |
ac3bc6c1 PB |
502 | if (sockfd < 0) { |
503 | saved_errno = errno; | |
4c505f71 | 504 | continue; |
ac3bc6c1 | 505 | } |
4c505f71 PA |
506 | |
507 | memset(&sa, 0, sizeof sa); | |
508 | sa.sin_family = he->h_addrtype; | |
6573faff | 509 | sa.sin_port = htons(nport); |
c6164218 | 510 | memcpy(&sa.sin_addr, *ap, he->h_length); |
4c505f71 PA |
511 | |
512 | if (connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) { | |
ac3bc6c1 | 513 | saved_errno = errno; |
4c505f71 PA |
514 | close(sockfd); |
515 | sockfd = -1; | |
516 | continue; | |
517 | } | |
518 | break; | |
519 | } | |
520 | ||
521 | if (sockfd < 0) | |
ac3bc6c1 | 522 | die("unable to connect a socket (%s)", strerror(saved_errno)); |
4c505f71 | 523 | |
5ad312be JL |
524 | return sockfd; |
525 | } | |
526 | ||
527 | #endif /* NO_IPV6 */ | |
528 | ||
529 | ||
c78963d2 | 530 | static void git_tcp_connect(int fd[2], char *host) |
5ad312be JL |
531 | { |
532 | int sockfd = git_tcp_connect_sock(host); | |
533 | ||
4c505f71 | 534 | fd[0] = sockfd; |
ec587fde | 535 | fd[1] = dup(sockfd); |
4c505f71 PA |
536 | } |
537 | ||
4c505f71 | 538 | |
96f1e58f DR |
539 | static char *git_proxy_command; |
540 | static const char *rhost_name; | |
e814bc4d | 541 | static int rhost_len; |
f8014776 PC |
542 | |
543 | static int git_proxy_command_options(const char *var, const char *value) | |
544 | { | |
e814bc4d | 545 | if (!strcmp(var, "core.gitproxy")) { |
c3df8568 YH |
546 | const char *for_pos; |
547 | int matchlen = -1; | |
548 | int hostlen; | |
549 | ||
e814bc4d | 550 | if (git_proxy_command) |
f8014776 | 551 | return 0; |
e814bc4d JH |
552 | /* [core] |
553 | * ;# matches www.kernel.org as well | |
554 | * gitproxy = netcatter-1 for kernel.org | |
555 | * gitproxy = netcatter-2 for sample.xz | |
556 | * gitproxy = netcatter-default | |
557 | */ | |
c3df8568 | 558 | for_pos = strstr(value, " for "); |
e814bc4d JH |
559 | if (!for_pos) |
560 | /* matches everybody */ | |
561 | matchlen = strlen(value); | |
562 | else { | |
563 | hostlen = strlen(for_pos + 5); | |
564 | if (rhost_len < hostlen) | |
565 | matchlen = -1; | |
566 | else if (!strncmp(for_pos + 5, | |
567 | rhost_name + rhost_len - hostlen, | |
568 | hostlen) && | |
569 | ((rhost_len == hostlen) || | |
570 | rhost_name[rhost_len - hostlen -1] == '.')) | |
571 | matchlen = for_pos - value; | |
572 | else | |
573 | matchlen = -1; | |
574 | } | |
575 | if (0 <= matchlen) { | |
576 | /* core.gitproxy = none for kernel.org */ | |
577 | if (matchlen == 4 && | |
578 | !memcmp(value, "none", 4)) | |
579 | matchlen = 0; | |
580 | git_proxy_command = xmalloc(matchlen + 1); | |
581 | memcpy(git_proxy_command, value, matchlen); | |
582 | git_proxy_command[matchlen] = 0; | |
f8014776 | 583 | } |
e814bc4d | 584 | return 0; |
f8014776 PC |
585 | } |
586 | ||
587 | return git_default_config(var, value); | |
588 | } | |
589 | ||
e814bc4d | 590 | static int git_use_proxy(const char *host) |
f8014776 | 591 | { |
e814bc4d JH |
592 | rhost_name = host; |
593 | rhost_len = strlen(host); | |
f8014776 PC |
594 | git_proxy_command = getenv("GIT_PROXY_COMMAND"); |
595 | git_config(git_proxy_command_options); | |
e814bc4d JH |
596 | rhost_name = NULL; |
597 | return (git_proxy_command && *git_proxy_command); | |
f8014776 PC |
598 | } |
599 | ||
c78963d2 | 600 | static void git_proxy_connect(int fd[2], char *host) |
f8014776 | 601 | { |
554fe20d | 602 | const char *port = STR(DEFAULT_GIT_PORT); |
f8014776 | 603 | char *colon, *end; |
15a1c012 SP |
604 | const char *argv[4]; |
605 | struct child_process proxy; | |
f8014776 PC |
606 | |
607 | if (host[0] == '[') { | |
608 | end = strchr(host + 1, ']'); | |
609 | if (end) { | |
610 | *end = 0; | |
611 | end++; | |
612 | host++; | |
613 | } else | |
614 | end = host; | |
615 | } else | |
616 | end = host; | |
617 | colon = strchr(end, ':'); | |
618 | ||
619 | if (colon) { | |
620 | *colon = 0; | |
621 | port = colon + 1; | |
622 | } | |
623 | ||
15a1c012 SP |
624 | argv[0] = git_proxy_command; |
625 | argv[1] = host; | |
626 | argv[2] = port; | |
627 | argv[3] = NULL; | |
628 | memset(&proxy, 0, sizeof(proxy)); | |
629 | proxy.argv = argv; | |
630 | proxy.in = -1; | |
631 | proxy.out = -1; | |
632 | if (start_command(&proxy)) | |
633 | die("cannot start proxy %s", argv[0]); | |
634 | fd[0] = proxy.out; /* read from proxy stdout */ | |
635 | fd[1] = proxy.in; /* write to proxy stdin */ | |
f8014776 PC |
636 | } |
637 | ||
0f503d77 CC |
638 | #define MAX_CMD_LEN 1024 |
639 | ||
f7192598 | 640 | /* |
f42a5c4e FBH |
641 | * This returns 0 if the transport protocol does not need fork(2), |
642 | * or a process id if it does. Once done, finish the connection | |
643 | * with finish_connect() with the value returned from this function | |
644 | * (it is safe to call finish_connect() with 0 to support the former | |
645 | * case). | |
646 | * | |
647 | * Does not return a negative value on error; it just dies. | |
f7192598 | 648 | */ |
f42a5c4e | 649 | pid_t git_connect(int fd[2], char *url, const char *prog) |
f7192598 | 650 | { |
faea9ccb | 651 | char *host, *path = url; |
356bece0 YH |
652 | char *end; |
653 | int c; | |
f7192598 LT |
654 | int pipefd[2][2]; |
655 | pid_t pid; | |
faea9ccb | 656 | enum protocol protocol = PROTO_LOCAL; |
da2a95b2 | 657 | int free_path = 0; |
faea9ccb | 658 | |
f0b7367c JH |
659 | /* Without this we cannot rely on waitpid() to tell |
660 | * what happened to our children. | |
661 | */ | |
662 | signal(SIGCHLD, SIG_DFL); | |
663 | ||
faea9ccb AE |
664 | host = strstr(url, "://"); |
665 | if(host) { | |
666 | *host = '\0'; | |
667 | protocol = get_protocol(url); | |
668 | host += 3; | |
356bece0 YH |
669 | c = '/'; |
670 | } else { | |
f7192598 | 671 | host = url; |
356bece0 YH |
672 | c = ':'; |
673 | } | |
674 | ||
675 | if (host[0] == '[') { | |
676 | end = strchr(host + 1, ']'); | |
677 | if (end) { | |
678 | *end = 0; | |
679 | end++; | |
680 | host++; | |
681 | } else | |
682 | end = host; | |
683 | } else | |
684 | end = host; | |
685 | ||
686 | path = strchr(end, c); | |
687 | if (c == ':') { | |
688 | if (path) { | |
faea9ccb | 689 | protocol = PROTO_SSH; |
356bece0 YH |
690 | *path++ = '\0'; |
691 | } else | |
692 | path = host; | |
f7192598 | 693 | } |
2386d658 | 694 | |
faea9ccb AE |
695 | if (!path || !*path) |
696 | die("No path specified. See 'man git-pull' for valid url syntax"); | |
697 | ||
698 | /* | |
699 | * null-terminate hostname and point path to ~ for URL's like this: | |
700 | * ssh://host.xz/~user/repo | |
701 | */ | |
702 | if (protocol != PROTO_LOCAL && host != url) { | |
703 | char *ptr = path; | |
704 | if (path[1] == '~') | |
705 | path++; | |
da2a95b2 | 706 | else { |
9befac47 | 707 | path = xstrdup(ptr); |
da2a95b2 SH |
708 | free_path = 1; |
709 | } | |
faea9ccb AE |
710 | |
711 | *ptr = '\0'; | |
712 | } | |
713 | ||
f8014776 | 714 | if (protocol == PROTO_GIT) { |
5ad312be JL |
715 | /* These underlying connection commands die() if they |
716 | * cannot connect. | |
717 | */ | |
9befac47 | 718 | char *target_host = xstrdup(host); |
e814bc4d | 719 | if (git_use_proxy(host)) |
c78963d2 | 720 | git_proxy_connect(fd, host); |
da2a95b2 | 721 | else |
c78963d2 | 722 | git_tcp_connect(fd, host); |
5ad312be JL |
723 | /* |
724 | * Separate original protocol components prog and path | |
725 | * from extended components with a NUL byte. | |
726 | */ | |
727 | packet_write(fd[1], | |
728 | "%s %s%chost=%s%c", | |
729 | prog, path, 0, | |
730 | target_host, 0); | |
731 | free(target_host); | |
da2a95b2 SH |
732 | if (free_path) |
733 | free(path); | |
5ad312be | 734 | return 0; |
f8014776 | 735 | } |
2386d658 | 736 | |
f7192598 LT |
737 | if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0) |
738 | die("unable to create pipe pair for communication"); | |
739 | pid = fork(); | |
c9bc159d PD |
740 | if (pid < 0) |
741 | die("unable to fork"); | |
f7192598 | 742 | if (!pid) { |
0f503d77 CC |
743 | char command[MAX_CMD_LEN]; |
744 | char *posn = command; | |
745 | int size = MAX_CMD_LEN; | |
746 | int of = 0; | |
747 | ||
748 | of |= add_to_string(&posn, &size, prog, 0); | |
749 | of |= add_to_string(&posn, &size, " ", 0); | |
750 | of |= add_to_string(&posn, &size, path, 1); | |
751 | ||
752 | if (of) | |
753 | die("command line too long"); | |
754 | ||
f7192598 LT |
755 | dup2(pipefd[1][0], 0); |
756 | dup2(pipefd[0][1], 1); | |
757 | close(pipefd[0][0]); | |
758 | close(pipefd[0][1]); | |
759 | close(pipefd[1][0]); | |
760 | close(pipefd[1][1]); | |
4852f723 | 761 | if (protocol == PROTO_SSH) { |
c7c81b3a JR |
762 | const char *ssh, *ssh_basename; |
763 | ssh = getenv("GIT_SSH"); | |
764 | if (!ssh) ssh = "ssh"; | |
765 | ssh_basename = strrchr(ssh, '/'); | |
4852f723 MS |
766 | if (!ssh_basename) |
767 | ssh_basename = ssh; | |
768 | else | |
769 | ssh_basename++; | |
770 | execlp(ssh, ssh_basename, host, command, NULL); | |
771 | } | |
016fb48b MD |
772 | else { |
773 | unsetenv(ALTERNATE_DB_ENVIRONMENT); | |
774 | unsetenv(DB_ENVIRONMENT); | |
775 | unsetenv(GIT_DIR_ENVIRONMENT); | |
776 | unsetenv(GRAFT_ENVIRONMENT); | |
777 | unsetenv(INDEX_ENVIRONMENT); | |
f7192598 | 778 | execlp("sh", "sh", "-c", command, NULL); |
016fb48b | 779 | } |
f7192598 | 780 | die("exec failed"); |
016fb48b | 781 | } |
f7192598 LT |
782 | fd[0] = pipefd[0][0]; |
783 | fd[1] = pipefd[1][1]; | |
784 | close(pipefd[0][1]); | |
785 | close(pipefd[1][0]); | |
da2a95b2 SH |
786 | if (free_path) |
787 | free(path); | |
f7192598 LT |
788 | return pid; |
789 | } | |
790 | ||
791 | int finish_connect(pid_t pid) | |
792 | { | |
f42a5c4e FBH |
793 | if (pid == 0) |
794 | return 0; | |
795 | ||
53e1a761 | 796 | while (waitpid(pid, NULL, 0) < 0) { |
f7192598 | 797 | if (errno != EINTR) |
53e1a761 | 798 | return -1; |
f7192598 | 799 | } |
53e1a761 | 800 | return 0; |
f7192598 | 801 | } |