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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" |
f7192598 | 6 | |
96f1e58f | 7 | static char *server_capabilities; |
211b5f9e | 8 | |
2718ff09 LT |
9 | static int check_ref(const char *name, int len, unsigned int flags) |
10 | { | |
11 | if (!flags) | |
12 | return 1; | |
13 | ||
c41e20b3 | 14 | if (len < 5 || memcmp(name, "refs/", 5)) |
2718ff09 LT |
15 | return 0; |
16 | ||
17 | /* Skip the "refs/" part */ | |
18 | name += 5; | |
19 | len -= 5; | |
20 | ||
21 | /* REF_NORMAL means that we don't want the magic fake tag refs */ | |
22 | if ((flags & REF_NORMAL) && check_ref_format(name) < 0) | |
23 | return 0; | |
24 | ||
25 | /* REF_HEADS means that we want regular branch heads */ | |
26 | if ((flags & REF_HEADS) && !memcmp(name, "heads/", 6)) | |
27 | return 1; | |
28 | ||
29 | /* REF_TAGS means that we want tags */ | |
30 | if ((flags & REF_TAGS) && !memcmp(name, "tags/", 5)) | |
31 | return 1; | |
32 | ||
33 | /* All type bits clear means that we are ok with anything */ | |
34 | return !(flags & ~REF_NORMAL); | |
35 | } | |
36 | ||
d1c133f5 LT |
37 | /* |
38 | * Read all the refs from the other end | |
39 | */ | |
1a7141ff | 40 | struct ref **get_remote_heads(int in, struct ref **list, |
2718ff09 LT |
41 | int nr_match, char **match, |
42 | unsigned int flags) | |
d1c133f5 LT |
43 | { |
44 | *list = NULL; | |
45 | for (;;) { | |
46 | struct ref *ref; | |
47 | unsigned char old_sha1[20]; | |
48 | static char buffer[1000]; | |
49 | char *name; | |
211b5f9e | 50 | int len, name_len; |
d1c133f5 LT |
51 | |
52 | len = packet_read_line(in, buffer, sizeof(buffer)); | |
53 | if (!len) | |
54 | break; | |
55 | if (buffer[len-1] == '\n') | |
56 | buffer[--len] = 0; | |
57 | ||
58 | if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ') | |
59 | die("protocol error: expected sha/ref, got '%s'", buffer); | |
60 | name = buffer + 41; | |
1a7141ff | 61 | |
211b5f9e JS |
62 | name_len = strlen(name); |
63 | if (len != name_len + 41) { | |
64 | if (server_capabilities) | |
65 | free(server_capabilities); | |
9befac47 | 66 | server_capabilities = xstrdup(name + name_len + 1); |
211b5f9e JS |
67 | } |
68 | ||
2718ff09 | 69 | if (!check_ref(name, name_len, flags)) |
cfee10a7 | 70 | continue; |
d1c133f5 LT |
71 | if (nr_match && !path_match(name, nr_match, match)) |
72 | continue; | |
f88395ac | 73 | ref = xcalloc(1, sizeof(*ref) + len - 40); |
e702496e | 74 | hashcpy(ref->old_sha1, old_sha1); |
d1c133f5 | 75 | memcpy(ref->name, buffer + 41, len - 40); |
d1c133f5 LT |
76 | *list = ref; |
77 | list = &ref->next; | |
78 | } | |
79 | return list; | |
80 | } | |
81 | ||
211b5f9e JS |
82 | int server_supports(const char *feature) |
83 | { | |
1f5881bb JS |
84 | return server_capabilities && |
85 | strstr(server_capabilities, feature) != NULL; | |
211b5f9e JS |
86 | } |
87 | ||
41cb7488 LT |
88 | int get_ack(int fd, unsigned char *result_sha1) |
89 | { | |
90 | static char line[1000]; | |
91 | int len = packet_read_line(fd, line, sizeof(line)); | |
92 | ||
93 | if (!len) | |
94 | die("git-fetch-pack: expected ACK/NAK, got EOF"); | |
95 | if (line[len-1] == '\n') | |
96 | line[--len] = 0; | |
97 | if (!strcmp(line, "NAK")) | |
98 | return 0; | |
da2a95b2 | 99 | if (!strncmp(line, "ACK ", 4)) { |
c4c86f07 JS |
100 | if (!get_sha1_hex(line+4, result_sha1)) { |
101 | if (strstr(line+45, "continue")) | |
102 | return 2; | |
41cb7488 | 103 | return 1; |
c4c86f07 | 104 | } |
41cb7488 LT |
105 | } |
106 | die("git-fetch_pack: expected ACK/NAK, got '%s'", line); | |
107 | } | |
108 | ||
013e7c7f LT |
109 | int path_match(const char *path, int nr, char **match) |
110 | { | |
111 | int i; | |
112 | int pathlen = strlen(path); | |
113 | ||
114 | for (i = 0; i < nr; i++) { | |
115 | char *s = match[i]; | |
116 | int len = strlen(s); | |
117 | ||
118 | if (!len || len > pathlen) | |
119 | continue; | |
120 | if (memcmp(path + pathlen - len, s, len)) | |
121 | continue; | |
122 | if (pathlen > len && path[pathlen - len - 1] != '/') | |
123 | continue; | |
124 | *s = 0; | |
9546010b | 125 | return (i + 1); |
013e7c7f LT |
126 | } |
127 | return 0; | |
128 | } | |
129 | ||
f88395ac JH |
130 | struct refspec { |
131 | char *src; | |
132 | char *dst; | |
ff27adf3 | 133 | char force; |
f88395ac JH |
134 | }; |
135 | ||
ff27adf3 JH |
136 | /* |
137 | * A:B means fast forward remote B with local A. | |
138 | * +A:B means overwrite remote B with local A. | |
139 | * +A is a shorthand for +A:A. | |
140 | * A is a shorthand for A:A. | |
d4f694ba | 141 | * :B means delete remote B. |
ff27adf3 | 142 | */ |
f88395ac JH |
143 | static struct refspec *parse_ref_spec(int nr_refspec, char **refspec) |
144 | { | |
145 | int i; | |
ff27adf3 | 146 | struct refspec *rs = xcalloc(sizeof(*rs), (nr_refspec + 1)); |
f88395ac JH |
147 | for (i = 0; i < nr_refspec; i++) { |
148 | char *sp, *dp, *ep; | |
149 | sp = refspec[i]; | |
ff27adf3 JH |
150 | if (*sp == '+') { |
151 | rs[i].force = 1; | |
152 | sp++; | |
153 | } | |
f88395ac JH |
154 | ep = strchr(sp, ':'); |
155 | if (ep) { | |
156 | dp = ep + 1; | |
157 | *ep = 0; | |
158 | } | |
159 | else | |
160 | dp = sp; | |
161 | rs[i].src = sp; | |
162 | rs[i].dst = dp; | |
163 | } | |
164 | rs[nr_refspec].src = rs[nr_refspec].dst = NULL; | |
165 | return rs; | |
166 | } | |
167 | ||
168 | static int count_refspec_match(const char *pattern, | |
169 | struct ref *refs, | |
170 | struct ref **matched_ref) | |
171 | { | |
f88395ac | 172 | int patlen = strlen(pattern); |
29561ad0 JH |
173 | struct ref *matched_weak = NULL; |
174 | struct ref *matched = NULL; | |
175 | int weak_match = 0; | |
176 | int match = 0; | |
f88395ac | 177 | |
29561ad0 | 178 | for (weak_match = match = 0; refs; refs = refs->next) { |
f88395ac JH |
179 | char *name = refs->name; |
180 | int namelen = strlen(name); | |
29561ad0 JH |
181 | int weak_match; |
182 | ||
f88395ac JH |
183 | if (namelen < patlen || |
184 | memcmp(name + namelen - patlen, pattern, patlen)) | |
185 | continue; | |
186 | if (namelen != patlen && name[namelen - patlen - 1] != '/') | |
187 | continue; | |
29561ad0 JH |
188 | |
189 | /* A match is "weak" if it is with refs outside | |
190 | * heads or tags, and did not specify the pattern | |
191 | * in full (e.g. "refs/remotes/origin/master") or at | |
192 | * least from the toplevel (e.g. "remotes/origin/master"); | |
193 | * otherwise "git push $URL master" would result in | |
194 | * ambiguity between remotes/origin/master and heads/master | |
195 | * at the remote site. | |
196 | */ | |
197 | if (namelen != patlen && | |
198 | patlen != namelen - 5 && | |
199 | strncmp(name, "refs/heads/", 11) && | |
200 | strncmp(name, "refs/tags/", 10)) { | |
201 | /* We want to catch the case where only weak | |
202 | * matches are found and there are multiple | |
203 | * matches, and where more than one strong | |
204 | * matches are found, as ambiguous. One | |
205 | * strong match with zero or more weak matches | |
206 | * are acceptable as a unique match. | |
207 | */ | |
208 | matched_weak = refs; | |
209 | weak_match++; | |
210 | } | |
211 | else { | |
212 | matched = refs; | |
213 | match++; | |
214 | } | |
215 | } | |
216 | if (!matched) { | |
217 | *matched_ref = matched_weak; | |
218 | return weak_match; | |
219 | } | |
220 | else { | |
221 | *matched_ref = matched; | |
222 | return match; | |
f88395ac | 223 | } |
f88395ac JH |
224 | } |
225 | ||
226 | static void link_dst_tail(struct ref *ref, struct ref ***tail) | |
227 | { | |
228 | **tail = ref; | |
229 | *tail = &ref->next; | |
230 | **tail = NULL; | |
231 | } | |
232 | ||
15e02b37 JH |
233 | static struct ref *try_explicit_object_name(const char *name) |
234 | { | |
235 | unsigned char sha1[20]; | |
236 | struct ref *ref; | |
237 | int len; | |
d4f694ba JH |
238 | |
239 | if (!*name) { | |
240 | ref = xcalloc(1, sizeof(*ref) + 20); | |
241 | strcpy(ref->name, "(delete)"); | |
242 | hashclr(ref->new_sha1); | |
243 | return ref; | |
244 | } | |
15e02b37 JH |
245 | if (get_sha1(name, sha1)) |
246 | return NULL; | |
247 | len = strlen(name) + 1; | |
248 | ref = xcalloc(1, sizeof(*ref) + len); | |
249 | memcpy(ref->name, name, len); | |
e702496e | 250 | hashcpy(ref->new_sha1, sha1); |
15e02b37 JH |
251 | return ref; |
252 | } | |
253 | ||
f88395ac JH |
254 | static int match_explicit_refs(struct ref *src, struct ref *dst, |
255 | struct ref ***dst_tail, struct refspec *rs) | |
256 | { | |
257 | int i, errs; | |
258 | for (i = errs = 0; rs[i].src; i++) { | |
259 | struct ref *matched_src, *matched_dst; | |
260 | ||
261 | matched_src = matched_dst = NULL; | |
262 | switch (count_refspec_match(rs[i].src, src, &matched_src)) { | |
263 | case 1: | |
264 | break; | |
265 | case 0: | |
15e02b37 | 266 | /* The source could be in the get_sha1() format |
d4f694ba JH |
267 | * not a reference name. :refs/other is a |
268 | * way to delete 'other' ref at the remote end. | |
15e02b37 JH |
269 | */ |
270 | matched_src = try_explicit_object_name(rs[i].src); | |
271 | if (matched_src) | |
272 | break; | |
f88395ac | 273 | errs = 1; |
4ec99bf0 TS |
274 | error("src refspec %s does not match any.", |
275 | rs[i].src); | |
f88395ac JH |
276 | break; |
277 | default: | |
278 | errs = 1; | |
279 | error("src refspec %s matches more than one.", | |
280 | rs[i].src); | |
281 | break; | |
282 | } | |
283 | switch (count_refspec_match(rs[i].dst, dst, &matched_dst)) { | |
284 | case 1: | |
285 | break; | |
286 | case 0: | |
287 | if (!memcmp(rs[i].dst, "refs/", 5)) { | |
288 | int len = strlen(rs[i].dst) + 1; | |
289 | matched_dst = xcalloc(1, sizeof(*dst) + len); | |
290 | memcpy(matched_dst->name, rs[i].dst, len); | |
291 | link_dst_tail(matched_dst, dst_tail); | |
292 | } | |
293 | else if (!strcmp(rs[i].src, rs[i].dst) && | |
294 | matched_src) { | |
295 | /* pushing "master:master" when | |
296 | * remote does not have master yet. | |
297 | */ | |
4fa1604f | 298 | int len = strlen(matched_src->name) + 1; |
f88395ac JH |
299 | matched_dst = xcalloc(1, sizeof(*dst) + len); |
300 | memcpy(matched_dst->name, matched_src->name, | |
301 | len); | |
302 | link_dst_tail(matched_dst, dst_tail); | |
303 | } | |
304 | else { | |
305 | errs = 1; | |
306 | error("dst refspec %s does not match any " | |
307 | "existing ref on the remote and does " | |
308 | "not start with refs/.", rs[i].dst); | |
309 | } | |
310 | break; | |
311 | default: | |
312 | errs = 1; | |
313 | error("dst refspec %s matches more than one.", | |
314 | rs[i].dst); | |
315 | break; | |
316 | } | |
317 | if (errs) | |
318 | continue; | |
f88395ac JH |
319 | if (matched_dst->peer_ref) { |
320 | errs = 1; | |
321 | error("dst ref %s receives from more than one src.", | |
322 | matched_dst->name); | |
323 | } | |
ff27adf3 | 324 | else { |
f88395ac | 325 | matched_dst->peer_ref = matched_src; |
ff27adf3 JH |
326 | matched_dst->force = rs[i].force; |
327 | } | |
f88395ac JH |
328 | } |
329 | return -errs; | |
330 | } | |
331 | ||
332 | static struct ref *find_ref_by_name(struct ref *list, const char *name) | |
333 | { | |
334 | for ( ; list; list = list->next) | |
335 | if (!strcmp(list->name, name)) | |
336 | return list; | |
337 | return NULL; | |
338 | } | |
339 | ||
340 | int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail, | |
341 | int nr_refspec, char **refspec, int all) | |
342 | { | |
343 | struct refspec *rs = parse_ref_spec(nr_refspec, refspec); | |
344 | ||
345 | if (nr_refspec) | |
346 | return match_explicit_refs(src, dst, dst_tail, rs); | |
347 | ||
348 | /* pick the remainder */ | |
349 | for ( ; src; src = src->next) { | |
350 | struct ref *dst_peer; | |
351 | if (src->peer_ref) | |
352 | continue; | |
353 | dst_peer = find_ref_by_name(dst, src->name); | |
635d37af | 354 | if ((dst_peer && dst_peer->peer_ref) || (!dst_peer && !all)) |
f88395ac JH |
355 | continue; |
356 | if (!dst_peer) { | |
f88395ac JH |
357 | /* Create a new one and link it */ |
358 | int len = strlen(src->name) + 1; | |
359 | dst_peer = xcalloc(1, sizeof(*dst_peer) + len); | |
360 | memcpy(dst_peer->name, src->name, len); | |
e702496e | 361 | hashcpy(dst_peer->new_sha1, src->new_sha1); |
f88395ac JH |
362 | link_dst_tail(dst_peer, dst_tail); |
363 | } | |
364 | dst_peer->peer_ref = src; | |
365 | } | |
366 | return 0; | |
367 | } | |
368 | ||
2386d658 LT |
369 | enum protocol { |
370 | PROTO_LOCAL = 1, | |
371 | PROTO_SSH, | |
372 | PROTO_GIT, | |
373 | }; | |
374 | ||
375 | static enum protocol get_protocol(const char *name) | |
376 | { | |
377 | if (!strcmp(name, "ssh")) | |
378 | return PROTO_SSH; | |
379 | if (!strcmp(name, "git")) | |
380 | return PROTO_GIT; | |
c05186cc LT |
381 | if (!strcmp(name, "git+ssh")) |
382 | return PROTO_SSH; | |
383 | if (!strcmp(name, "ssh+git")) | |
384 | return PROTO_SSH; | |
2386d658 LT |
385 | die("I don't handle protocol '%s'", name); |
386 | } | |
387 | ||
5ba88448 YH |
388 | #define STR_(s) # s |
389 | #define STR(s) STR_(s) | |
2386d658 | 390 | |
49744d63 | 391 | #ifndef NO_IPV6 |
4c505f71 | 392 | |
5ad312be JL |
393 | /* |
394 | * Returns a connected socket() fd, or else die()s. | |
395 | */ | |
396 | static int git_tcp_connect_sock(char *host) | |
2386d658 | 397 | { |
ac3bc6c1 | 398 | int sockfd = -1, saved_errno = 0; |
5ba88448 | 399 | char *colon, *end; |
554fe20d | 400 | const char *port = STR(DEFAULT_GIT_PORT); |
5ba88448 YH |
401 | struct addrinfo hints, *ai0, *ai; |
402 | int gai; | |
403 | ||
404 | if (host[0] == '[') { | |
405 | end = strchr(host + 1, ']'); | |
406 | if (end) { | |
407 | *end = 0; | |
408 | end++; | |
409 | host++; | |
410 | } else | |
411 | end = host; | |
412 | } else | |
413 | end = host; | |
414 | colon = strchr(end, ':'); | |
415 | ||
ce6f8e7e LT |
416 | if (colon) { |
417 | *colon = 0; | |
5ba88448 | 418 | port = colon + 1; |
ce6f8e7e | 419 | } |
5ba88448 YH |
420 | |
421 | memset(&hints, 0, sizeof(hints)); | |
422 | hints.ai_socktype = SOCK_STREAM; | |
423 | hints.ai_protocol = IPPROTO_TCP; | |
424 | ||
425 | gai = getaddrinfo(host, port, &hints, &ai); | |
426 | if (gai) | |
427 | die("Unable to look up %s (%s)", host, gai_strerror(gai)); | |
428 | ||
429 | for (ai0 = ai; ai; ai = ai->ai_next) { | |
5ad312be JL |
430 | sockfd = socket(ai->ai_family, |
431 | ai->ai_socktype, ai->ai_protocol); | |
ac3bc6c1 PB |
432 | if (sockfd < 0) { |
433 | saved_errno = errno; | |
5ba88448 | 434 | continue; |
ac3bc6c1 | 435 | } |
5ba88448 | 436 | if (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) { |
ac3bc6c1 | 437 | saved_errno = errno; |
5ba88448 YH |
438 | close(sockfd); |
439 | sockfd = -1; | |
440 | continue; | |
2386d658 | 441 | } |
5ba88448 | 442 | break; |
2386d658 LT |
443 | } |
444 | ||
5ba88448 | 445 | freeaddrinfo(ai0); |
2386d658 | 446 | |
2386d658 | 447 | if (sockfd < 0) |
ac3bc6c1 | 448 | die("unable to connect a socket (%s)", strerror(saved_errno)); |
5ba88448 | 449 | |
5ad312be | 450 | return sockfd; |
2386d658 LT |
451 | } |
452 | ||
49744d63 | 453 | #else /* NO_IPV6 */ |
4c505f71 | 454 | |
5ad312be JL |
455 | /* |
456 | * Returns a connected socket() fd, or else die()s. | |
457 | */ | |
458 | static int git_tcp_connect_sock(char *host) | |
4c505f71 | 459 | { |
ac3bc6c1 | 460 | int sockfd = -1, saved_errno = 0; |
4c505f71 PA |
461 | char *colon, *end; |
462 | char *port = STR(DEFAULT_GIT_PORT), *ep; | |
463 | struct hostent *he; | |
464 | struct sockaddr_in sa; | |
465 | char **ap; | |
466 | unsigned int nport; | |
467 | ||
468 | if (host[0] == '[') { | |
469 | end = strchr(host + 1, ']'); | |
470 | if (end) { | |
471 | *end = 0; | |
472 | end++; | |
473 | host++; | |
474 | } else | |
475 | end = host; | |
476 | } else | |
477 | end = host; | |
478 | colon = strchr(end, ':'); | |
479 | ||
480 | if (colon) { | |
481 | *colon = 0; | |
482 | port = colon + 1; | |
483 | } | |
484 | ||
4c505f71 PA |
485 | he = gethostbyname(host); |
486 | if (!he) | |
487 | die("Unable to look up %s (%s)", host, hstrerror(h_errno)); | |
488 | nport = strtoul(port, &ep, 10); | |
489 | if ( ep == port || *ep ) { | |
490 | /* Not numeric */ | |
491 | struct servent *se = getservbyname(port,"tcp"); | |
492 | if ( !se ) | |
493 | die("Unknown port %s\n", port); | |
494 | nport = se->s_port; | |
495 | } | |
496 | ||
497 | for (ap = he->h_addr_list; *ap; ap++) { | |
498 | sockfd = socket(he->h_addrtype, SOCK_STREAM, 0); | |
ac3bc6c1 PB |
499 | if (sockfd < 0) { |
500 | saved_errno = errno; | |
4c505f71 | 501 | continue; |
ac3bc6c1 | 502 | } |
4c505f71 PA |
503 | |
504 | memset(&sa, 0, sizeof sa); | |
505 | sa.sin_family = he->h_addrtype; | |
6573faff | 506 | sa.sin_port = htons(nport); |
c6164218 | 507 | memcpy(&sa.sin_addr, *ap, he->h_length); |
4c505f71 PA |
508 | |
509 | if (connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) { | |
ac3bc6c1 | 510 | saved_errno = errno; |
4c505f71 PA |
511 | close(sockfd); |
512 | sockfd = -1; | |
513 | continue; | |
514 | } | |
515 | break; | |
516 | } | |
517 | ||
518 | if (sockfd < 0) | |
ac3bc6c1 | 519 | die("unable to connect a socket (%s)", strerror(saved_errno)); |
4c505f71 | 520 | |
5ad312be JL |
521 | return sockfd; |
522 | } | |
523 | ||
524 | #endif /* NO_IPV6 */ | |
525 | ||
526 | ||
c78963d2 | 527 | static void git_tcp_connect(int fd[2], char *host) |
5ad312be JL |
528 | { |
529 | int sockfd = git_tcp_connect_sock(host); | |
530 | ||
4c505f71 PA |
531 | fd[0] = sockfd; |
532 | fd[1] = sockfd; | |
4c505f71 PA |
533 | } |
534 | ||
4c505f71 | 535 | |
96f1e58f DR |
536 | static char *git_proxy_command; |
537 | static const char *rhost_name; | |
e814bc4d | 538 | static int rhost_len; |
f8014776 PC |
539 | |
540 | static int git_proxy_command_options(const char *var, const char *value) | |
541 | { | |
e814bc4d | 542 | if (!strcmp(var, "core.gitproxy")) { |
c3df8568 YH |
543 | const char *for_pos; |
544 | int matchlen = -1; | |
545 | int hostlen; | |
546 | ||
e814bc4d | 547 | if (git_proxy_command) |
f8014776 | 548 | return 0; |
e814bc4d JH |
549 | /* [core] |
550 | * ;# matches www.kernel.org as well | |
551 | * gitproxy = netcatter-1 for kernel.org | |
552 | * gitproxy = netcatter-2 for sample.xz | |
553 | * gitproxy = netcatter-default | |
554 | */ | |
c3df8568 | 555 | for_pos = strstr(value, " for "); |
e814bc4d JH |
556 | if (!for_pos) |
557 | /* matches everybody */ | |
558 | matchlen = strlen(value); | |
559 | else { | |
560 | hostlen = strlen(for_pos + 5); | |
561 | if (rhost_len < hostlen) | |
562 | matchlen = -1; | |
563 | else if (!strncmp(for_pos + 5, | |
564 | rhost_name + rhost_len - hostlen, | |
565 | hostlen) && | |
566 | ((rhost_len == hostlen) || | |
567 | rhost_name[rhost_len - hostlen -1] == '.')) | |
568 | matchlen = for_pos - value; | |
569 | else | |
570 | matchlen = -1; | |
571 | } | |
572 | if (0 <= matchlen) { | |
573 | /* core.gitproxy = none for kernel.org */ | |
574 | if (matchlen == 4 && | |
575 | !memcmp(value, "none", 4)) | |
576 | matchlen = 0; | |
577 | git_proxy_command = xmalloc(matchlen + 1); | |
578 | memcpy(git_proxy_command, value, matchlen); | |
579 | git_proxy_command[matchlen] = 0; | |
f8014776 | 580 | } |
e814bc4d | 581 | return 0; |
f8014776 PC |
582 | } |
583 | ||
584 | return git_default_config(var, value); | |
585 | } | |
586 | ||
e814bc4d | 587 | static int git_use_proxy(const char *host) |
f8014776 | 588 | { |
e814bc4d JH |
589 | rhost_name = host; |
590 | rhost_len = strlen(host); | |
f8014776 PC |
591 | git_proxy_command = getenv("GIT_PROXY_COMMAND"); |
592 | git_config(git_proxy_command_options); | |
e814bc4d JH |
593 | rhost_name = NULL; |
594 | return (git_proxy_command && *git_proxy_command); | |
f8014776 PC |
595 | } |
596 | ||
c78963d2 | 597 | static void git_proxy_connect(int fd[2], char *host) |
f8014776 | 598 | { |
554fe20d | 599 | const char *port = STR(DEFAULT_GIT_PORT); |
f8014776 PC |
600 | char *colon, *end; |
601 | int pipefd[2][2]; | |
602 | pid_t pid; | |
603 | ||
604 | if (host[0] == '[') { | |
605 | end = strchr(host + 1, ']'); | |
606 | if (end) { | |
607 | *end = 0; | |
608 | end++; | |
609 | host++; | |
610 | } else | |
611 | end = host; | |
612 | } else | |
613 | end = host; | |
614 | colon = strchr(end, ':'); | |
615 | ||
616 | if (colon) { | |
617 | *colon = 0; | |
618 | port = colon + 1; | |
619 | } | |
620 | ||
621 | if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0) | |
622 | die("unable to create pipe pair for communication"); | |
623 | pid = fork(); | |
624 | if (!pid) { | |
625 | dup2(pipefd[1][0], 0); | |
626 | dup2(pipefd[0][1], 1); | |
627 | close(pipefd[0][0]); | |
628 | close(pipefd[0][1]); | |
629 | close(pipefd[1][0]); | |
630 | close(pipefd[1][1]); | |
631 | execlp(git_proxy_command, git_proxy_command, host, port, NULL); | |
632 | die("exec failed"); | |
633 | } | |
5ad312be JL |
634 | if (pid < 0) |
635 | die("fork failed"); | |
f8014776 PC |
636 | fd[0] = pipefd[0][0]; |
637 | fd[1] = pipefd[1][1]; | |
638 | close(pipefd[0][1]); | |
639 | close(pipefd[1][0]); | |
f8014776 PC |
640 | } |
641 | ||
0f503d77 CC |
642 | #define MAX_CMD_LEN 1024 |
643 | ||
f7192598 | 644 | /* |
f42a5c4e FBH |
645 | * This returns 0 if the transport protocol does not need fork(2), |
646 | * or a process id if it does. Once done, finish the connection | |
647 | * with finish_connect() with the value returned from this function | |
648 | * (it is safe to call finish_connect() with 0 to support the former | |
649 | * case). | |
650 | * | |
651 | * Does not return a negative value on error; it just dies. | |
f7192598 | 652 | */ |
f42a5c4e | 653 | pid_t git_connect(int fd[2], char *url, const char *prog) |
f7192598 | 654 | { |
faea9ccb | 655 | char *host, *path = url; |
356bece0 YH |
656 | char *end; |
657 | int c; | |
f7192598 LT |
658 | int pipefd[2][2]; |
659 | pid_t pid; | |
faea9ccb | 660 | enum protocol protocol = PROTO_LOCAL; |
da2a95b2 | 661 | int free_path = 0; |
faea9ccb | 662 | |
f0b7367c JH |
663 | /* Without this we cannot rely on waitpid() to tell |
664 | * what happened to our children. | |
665 | */ | |
666 | signal(SIGCHLD, SIG_DFL); | |
667 | ||
faea9ccb AE |
668 | host = strstr(url, "://"); |
669 | if(host) { | |
670 | *host = '\0'; | |
671 | protocol = get_protocol(url); | |
672 | host += 3; | |
356bece0 YH |
673 | c = '/'; |
674 | } else { | |
f7192598 | 675 | host = url; |
356bece0 YH |
676 | c = ':'; |
677 | } | |
678 | ||
679 | if (host[0] == '[') { | |
680 | end = strchr(host + 1, ']'); | |
681 | if (end) { | |
682 | *end = 0; | |
683 | end++; | |
684 | host++; | |
685 | } else | |
686 | end = host; | |
687 | } else | |
688 | end = host; | |
689 | ||
690 | path = strchr(end, c); | |
691 | if (c == ':') { | |
692 | if (path) { | |
faea9ccb | 693 | protocol = PROTO_SSH; |
356bece0 YH |
694 | *path++ = '\0'; |
695 | } else | |
696 | path = host; | |
f7192598 | 697 | } |
2386d658 | 698 | |
faea9ccb AE |
699 | if (!path || !*path) |
700 | die("No path specified. See 'man git-pull' for valid url syntax"); | |
701 | ||
702 | /* | |
703 | * null-terminate hostname and point path to ~ for URL's like this: | |
704 | * ssh://host.xz/~user/repo | |
705 | */ | |
706 | if (protocol != PROTO_LOCAL && host != url) { | |
707 | char *ptr = path; | |
708 | if (path[1] == '~') | |
709 | path++; | |
da2a95b2 | 710 | else { |
9befac47 | 711 | path = xstrdup(ptr); |
da2a95b2 SH |
712 | free_path = 1; |
713 | } | |
faea9ccb AE |
714 | |
715 | *ptr = '\0'; | |
716 | } | |
717 | ||
f8014776 | 718 | if (protocol == PROTO_GIT) { |
5ad312be JL |
719 | /* These underlying connection commands die() if they |
720 | * cannot connect. | |
721 | */ | |
9befac47 | 722 | char *target_host = xstrdup(host); |
e814bc4d | 723 | if (git_use_proxy(host)) |
c78963d2 | 724 | git_proxy_connect(fd, host); |
da2a95b2 | 725 | else |
c78963d2 | 726 | git_tcp_connect(fd, host); |
5ad312be JL |
727 | /* |
728 | * Separate original protocol components prog and path | |
729 | * from extended components with a NUL byte. | |
730 | */ | |
731 | packet_write(fd[1], | |
732 | "%s %s%chost=%s%c", | |
733 | prog, path, 0, | |
734 | target_host, 0); | |
735 | free(target_host); | |
da2a95b2 SH |
736 | if (free_path) |
737 | free(path); | |
5ad312be | 738 | return 0; |
f8014776 | 739 | } |
2386d658 | 740 | |
f7192598 LT |
741 | if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0) |
742 | die("unable to create pipe pair for communication"); | |
743 | pid = fork(); | |
c9bc159d PD |
744 | if (pid < 0) |
745 | die("unable to fork"); | |
f7192598 | 746 | if (!pid) { |
0f503d77 CC |
747 | char command[MAX_CMD_LEN]; |
748 | char *posn = command; | |
749 | int size = MAX_CMD_LEN; | |
750 | int of = 0; | |
751 | ||
752 | of |= add_to_string(&posn, &size, prog, 0); | |
753 | of |= add_to_string(&posn, &size, " ", 0); | |
754 | of |= add_to_string(&posn, &size, path, 1); | |
755 | ||
756 | if (of) | |
757 | die("command line too long"); | |
758 | ||
f7192598 LT |
759 | dup2(pipefd[1][0], 0); |
760 | dup2(pipefd[0][1], 1); | |
761 | close(pipefd[0][0]); | |
762 | close(pipefd[0][1]); | |
763 | close(pipefd[1][0]); | |
764 | close(pipefd[1][1]); | |
4852f723 | 765 | if (protocol == PROTO_SSH) { |
c7c81b3a JR |
766 | const char *ssh, *ssh_basename; |
767 | ssh = getenv("GIT_SSH"); | |
768 | if (!ssh) ssh = "ssh"; | |
769 | ssh_basename = strrchr(ssh, '/'); | |
4852f723 MS |
770 | if (!ssh_basename) |
771 | ssh_basename = ssh; | |
772 | else | |
773 | ssh_basename++; | |
774 | execlp(ssh, ssh_basename, host, command, NULL); | |
775 | } | |
016fb48b MD |
776 | else { |
777 | unsetenv(ALTERNATE_DB_ENVIRONMENT); | |
778 | unsetenv(DB_ENVIRONMENT); | |
779 | unsetenv(GIT_DIR_ENVIRONMENT); | |
780 | unsetenv(GRAFT_ENVIRONMENT); | |
781 | unsetenv(INDEX_ENVIRONMENT); | |
f7192598 | 782 | execlp("sh", "sh", "-c", command, NULL); |
016fb48b | 783 | } |
f7192598 | 784 | die("exec failed"); |
016fb48b | 785 | } |
f7192598 LT |
786 | fd[0] = pipefd[0][0]; |
787 | fd[1] = pipefd[1][1]; | |
788 | close(pipefd[0][1]); | |
789 | close(pipefd[1][0]); | |
da2a95b2 SH |
790 | if (free_path) |
791 | free(path); | |
f7192598 LT |
792 | return pid; |
793 | } | |
794 | ||
795 | int finish_connect(pid_t pid) | |
796 | { | |
f42a5c4e FBH |
797 | if (pid == 0) |
798 | return 0; | |
799 | ||
53e1a761 | 800 | while (waitpid(pid, NULL, 0) < 0) { |
f7192598 | 801 | if (errno != EINTR) |
53e1a761 | 802 | return -1; |
f7192598 | 803 | } |
53e1a761 | 804 | return 0; |
f7192598 | 805 | } |