]>
Commit | Line | Data |
---|---|---|
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 | #include <sys/wait.h> |
2386d658 LT |
7 | #include <sys/socket.h> |
8 | #include <netinet/in.h> | |
9 | #include <arpa/inet.h> | |
10 | #include <netdb.h> | |
e898081d | 11 | #include <signal.h> |
f7192598 | 12 | |
96f1e58f | 13 | static char *server_capabilities; |
211b5f9e | 14 | |
2718ff09 LT |
15 | static int check_ref(const char *name, int len, unsigned int flags) |
16 | { | |
17 | if (!flags) | |
18 | return 1; | |
19 | ||
c41e20b3 | 20 | if (len < 5 || memcmp(name, "refs/", 5)) |
2718ff09 LT |
21 | return 0; |
22 | ||
23 | /* Skip the "refs/" part */ | |
24 | name += 5; | |
25 | len -= 5; | |
26 | ||
27 | /* REF_NORMAL means that we don't want the magic fake tag refs */ | |
28 | if ((flags & REF_NORMAL) && check_ref_format(name) < 0) | |
29 | return 0; | |
30 | ||
31 | /* REF_HEADS means that we want regular branch heads */ | |
32 | if ((flags & REF_HEADS) && !memcmp(name, "heads/", 6)) | |
33 | return 1; | |
34 | ||
35 | /* REF_TAGS means that we want tags */ | |
36 | if ((flags & REF_TAGS) && !memcmp(name, "tags/", 5)) | |
37 | return 1; | |
38 | ||
39 | /* All type bits clear means that we are ok with anything */ | |
40 | return !(flags & ~REF_NORMAL); | |
41 | } | |
42 | ||
d1c133f5 LT |
43 | /* |
44 | * Read all the refs from the other end | |
45 | */ | |
1a7141ff | 46 | struct ref **get_remote_heads(int in, struct ref **list, |
2718ff09 LT |
47 | int nr_match, char **match, |
48 | unsigned int flags) | |
d1c133f5 LT |
49 | { |
50 | *list = NULL; | |
51 | for (;;) { | |
52 | struct ref *ref; | |
53 | unsigned char old_sha1[20]; | |
54 | static char buffer[1000]; | |
55 | char *name; | |
211b5f9e | 56 | int len, name_len; |
d1c133f5 LT |
57 | |
58 | len = packet_read_line(in, buffer, sizeof(buffer)); | |
59 | if (!len) | |
60 | break; | |
61 | if (buffer[len-1] == '\n') | |
62 | buffer[--len] = 0; | |
63 | ||
64 | if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ') | |
65 | die("protocol error: expected sha/ref, got '%s'", buffer); | |
66 | name = buffer + 41; | |
1a7141ff | 67 | |
211b5f9e JS |
68 | name_len = strlen(name); |
69 | if (len != name_len + 41) { | |
70 | if (server_capabilities) | |
71 | free(server_capabilities); | |
9befac47 | 72 | server_capabilities = xstrdup(name + name_len + 1); |
211b5f9e JS |
73 | } |
74 | ||
2718ff09 | 75 | if (!check_ref(name, name_len, flags)) |
cfee10a7 | 76 | continue; |
d1c133f5 LT |
77 | if (nr_match && !path_match(name, nr_match, match)) |
78 | continue; | |
f88395ac | 79 | ref = xcalloc(1, sizeof(*ref) + len - 40); |
e702496e | 80 | hashcpy(ref->old_sha1, old_sha1); |
d1c133f5 | 81 | memcpy(ref->name, buffer + 41, len - 40); |
d1c133f5 LT |
82 | *list = ref; |
83 | list = &ref->next; | |
84 | } | |
85 | return list; | |
86 | } | |
87 | ||
211b5f9e JS |
88 | int server_supports(const char *feature) |
89 | { | |
1f5881bb JS |
90 | return server_capabilities && |
91 | strstr(server_capabilities, feature) != NULL; | |
211b5f9e JS |
92 | } |
93 | ||
41cb7488 LT |
94 | int get_ack(int fd, unsigned char *result_sha1) |
95 | { | |
96 | static char line[1000]; | |
97 | int len = packet_read_line(fd, line, sizeof(line)); | |
98 | ||
99 | if (!len) | |
100 | die("git-fetch-pack: expected ACK/NAK, got EOF"); | |
101 | if (line[len-1] == '\n') | |
102 | line[--len] = 0; | |
103 | if (!strcmp(line, "NAK")) | |
104 | return 0; | |
da2a95b2 | 105 | if (!strncmp(line, "ACK ", 4)) { |
c4c86f07 JS |
106 | if (!get_sha1_hex(line+4, result_sha1)) { |
107 | if (strstr(line+45, "continue")) | |
108 | return 2; | |
41cb7488 | 109 | return 1; |
c4c86f07 | 110 | } |
41cb7488 LT |
111 | } |
112 | die("git-fetch_pack: expected ACK/NAK, got '%s'", line); | |
113 | } | |
114 | ||
013e7c7f LT |
115 | int path_match(const char *path, int nr, char **match) |
116 | { | |
117 | int i; | |
118 | int pathlen = strlen(path); | |
119 | ||
120 | for (i = 0; i < nr; i++) { | |
121 | char *s = match[i]; | |
122 | int len = strlen(s); | |
123 | ||
124 | if (!len || len > pathlen) | |
125 | continue; | |
126 | if (memcmp(path + pathlen - len, s, len)) | |
127 | continue; | |
128 | if (pathlen > len && path[pathlen - len - 1] != '/') | |
129 | continue; | |
130 | *s = 0; | |
9546010b | 131 | return (i + 1); |
013e7c7f LT |
132 | } |
133 | return 0; | |
134 | } | |
135 | ||
f88395ac JH |
136 | struct refspec { |
137 | char *src; | |
138 | char *dst; | |
ff27adf3 | 139 | char force; |
f88395ac JH |
140 | }; |
141 | ||
ff27adf3 JH |
142 | /* |
143 | * A:B means fast forward remote B with local A. | |
144 | * +A:B means overwrite remote B with local A. | |
145 | * +A is a shorthand for +A:A. | |
146 | * A is a shorthand for A:A. | |
147 | */ | |
f88395ac JH |
148 | static struct refspec *parse_ref_spec(int nr_refspec, char **refspec) |
149 | { | |
150 | int i; | |
ff27adf3 | 151 | struct refspec *rs = xcalloc(sizeof(*rs), (nr_refspec + 1)); |
f88395ac JH |
152 | for (i = 0; i < nr_refspec; i++) { |
153 | char *sp, *dp, *ep; | |
154 | sp = refspec[i]; | |
ff27adf3 JH |
155 | if (*sp == '+') { |
156 | rs[i].force = 1; | |
157 | sp++; | |
158 | } | |
f88395ac JH |
159 | ep = strchr(sp, ':'); |
160 | if (ep) { | |
161 | dp = ep + 1; | |
162 | *ep = 0; | |
163 | } | |
164 | else | |
165 | dp = sp; | |
166 | rs[i].src = sp; | |
167 | rs[i].dst = dp; | |
168 | } | |
169 | rs[nr_refspec].src = rs[nr_refspec].dst = NULL; | |
170 | return rs; | |
171 | } | |
172 | ||
173 | static int count_refspec_match(const char *pattern, | |
174 | struct ref *refs, | |
175 | struct ref **matched_ref) | |
176 | { | |
f88395ac | 177 | int patlen = strlen(pattern); |
29561ad0 JH |
178 | struct ref *matched_weak = NULL; |
179 | struct ref *matched = NULL; | |
180 | int weak_match = 0; | |
181 | int match = 0; | |
f88395ac | 182 | |
29561ad0 | 183 | for (weak_match = match = 0; refs; refs = refs->next) { |
f88395ac JH |
184 | char *name = refs->name; |
185 | int namelen = strlen(name); | |
29561ad0 JH |
186 | int weak_match; |
187 | ||
f88395ac JH |
188 | if (namelen < patlen || |
189 | memcmp(name + namelen - patlen, pattern, patlen)) | |
190 | continue; | |
191 | if (namelen != patlen && name[namelen - patlen - 1] != '/') | |
192 | continue; | |
29561ad0 JH |
193 | |
194 | /* A match is "weak" if it is with refs outside | |
195 | * heads or tags, and did not specify the pattern | |
196 | * in full (e.g. "refs/remotes/origin/master") or at | |
197 | * least from the toplevel (e.g. "remotes/origin/master"); | |
198 | * otherwise "git push $URL master" would result in | |
199 | * ambiguity between remotes/origin/master and heads/master | |
200 | * at the remote site. | |
201 | */ | |
202 | if (namelen != patlen && | |
203 | patlen != namelen - 5 && | |
204 | strncmp(name, "refs/heads/", 11) && | |
205 | strncmp(name, "refs/tags/", 10)) { | |
206 | /* We want to catch the case where only weak | |
207 | * matches are found and there are multiple | |
208 | * matches, and where more than one strong | |
209 | * matches are found, as ambiguous. One | |
210 | * strong match with zero or more weak matches | |
211 | * are acceptable as a unique match. | |
212 | */ | |
213 | matched_weak = refs; | |
214 | weak_match++; | |
215 | } | |
216 | else { | |
217 | matched = refs; | |
218 | match++; | |
219 | } | |
220 | } | |
221 | if (!matched) { | |
222 | *matched_ref = matched_weak; | |
223 | return weak_match; | |
224 | } | |
225 | else { | |
226 | *matched_ref = matched; | |
227 | return match; | |
f88395ac | 228 | } |
f88395ac JH |
229 | } |
230 | ||
231 | static void link_dst_tail(struct ref *ref, struct ref ***tail) | |
232 | { | |
233 | **tail = ref; | |
234 | *tail = &ref->next; | |
235 | **tail = NULL; | |
236 | } | |
237 | ||
15e02b37 JH |
238 | static struct ref *try_explicit_object_name(const char *name) |
239 | { | |
240 | unsigned char sha1[20]; | |
241 | struct ref *ref; | |
242 | int len; | |
243 | if (get_sha1(name, sha1)) | |
244 | return NULL; | |
245 | len = strlen(name) + 1; | |
246 | ref = xcalloc(1, sizeof(*ref) + len); | |
247 | memcpy(ref->name, name, len); | |
e702496e | 248 | hashcpy(ref->new_sha1, sha1); |
15e02b37 JH |
249 | return ref; |
250 | } | |
251 | ||
f88395ac JH |
252 | static int match_explicit_refs(struct ref *src, struct ref *dst, |
253 | struct ref ***dst_tail, struct refspec *rs) | |
254 | { | |
255 | int i, errs; | |
256 | for (i = errs = 0; rs[i].src; i++) { | |
257 | struct ref *matched_src, *matched_dst; | |
258 | ||
259 | matched_src = matched_dst = NULL; | |
260 | switch (count_refspec_match(rs[i].src, src, &matched_src)) { | |
261 | case 1: | |
262 | break; | |
263 | case 0: | |
15e02b37 JH |
264 | /* The source could be in the get_sha1() format |
265 | * not a reference name. | |
266 | */ | |
267 | matched_src = try_explicit_object_name(rs[i].src); | |
268 | if (matched_src) | |
269 | break; | |
f88395ac | 270 | errs = 1; |
4ec99bf0 TS |
271 | error("src refspec %s does not match any.", |
272 | rs[i].src); | |
f88395ac JH |
273 | break; |
274 | default: | |
275 | errs = 1; | |
276 | error("src refspec %s matches more than one.", | |
277 | rs[i].src); | |
278 | break; | |
279 | } | |
280 | switch (count_refspec_match(rs[i].dst, dst, &matched_dst)) { | |
281 | case 1: | |
282 | break; | |
283 | case 0: | |
284 | if (!memcmp(rs[i].dst, "refs/", 5)) { | |
285 | int len = strlen(rs[i].dst) + 1; | |
286 | matched_dst = xcalloc(1, sizeof(*dst) + len); | |
287 | memcpy(matched_dst->name, rs[i].dst, len); | |
288 | link_dst_tail(matched_dst, dst_tail); | |
289 | } | |
290 | else if (!strcmp(rs[i].src, rs[i].dst) && | |
291 | matched_src) { | |
292 | /* pushing "master:master" when | |
293 | * remote does not have master yet. | |
294 | */ | |
4fa1604f | 295 | int len = strlen(matched_src->name) + 1; |
f88395ac JH |
296 | matched_dst = xcalloc(1, sizeof(*dst) + len); |
297 | memcpy(matched_dst->name, matched_src->name, | |
298 | len); | |
299 | link_dst_tail(matched_dst, dst_tail); | |
300 | } | |
301 | else { | |
302 | errs = 1; | |
303 | error("dst refspec %s does not match any " | |
304 | "existing ref on the remote and does " | |
305 | "not start with refs/.", rs[i].dst); | |
306 | } | |
307 | break; | |
308 | default: | |
309 | errs = 1; | |
310 | error("dst refspec %s matches more than one.", | |
311 | rs[i].dst); | |
312 | break; | |
313 | } | |
314 | if (errs) | |
315 | continue; | |
f88395ac JH |
316 | if (matched_dst->peer_ref) { |
317 | errs = 1; | |
318 | error("dst ref %s receives from more than one src.", | |
319 | matched_dst->name); | |
320 | } | |
ff27adf3 | 321 | else { |
f88395ac | 322 | matched_dst->peer_ref = matched_src; |
ff27adf3 JH |
323 | matched_dst->force = rs[i].force; |
324 | } | |
f88395ac JH |
325 | } |
326 | return -errs; | |
327 | } | |
328 | ||
329 | static struct ref *find_ref_by_name(struct ref *list, const char *name) | |
330 | { | |
331 | for ( ; list; list = list->next) | |
332 | if (!strcmp(list->name, name)) | |
333 | return list; | |
334 | return NULL; | |
335 | } | |
336 | ||
337 | int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail, | |
338 | int nr_refspec, char **refspec, int all) | |
339 | { | |
340 | struct refspec *rs = parse_ref_spec(nr_refspec, refspec); | |
341 | ||
342 | if (nr_refspec) | |
343 | return match_explicit_refs(src, dst, dst_tail, rs); | |
344 | ||
345 | /* pick the remainder */ | |
346 | for ( ; src; src = src->next) { | |
347 | struct ref *dst_peer; | |
348 | if (src->peer_ref) | |
349 | continue; | |
350 | dst_peer = find_ref_by_name(dst, src->name); | |
635d37af | 351 | if ((dst_peer && dst_peer->peer_ref) || (!dst_peer && !all)) |
f88395ac JH |
352 | continue; |
353 | if (!dst_peer) { | |
f88395ac JH |
354 | /* Create a new one and link it */ |
355 | int len = strlen(src->name) + 1; | |
356 | dst_peer = xcalloc(1, sizeof(*dst_peer) + len); | |
357 | memcpy(dst_peer->name, src->name, len); | |
e702496e | 358 | hashcpy(dst_peer->new_sha1, src->new_sha1); |
f88395ac JH |
359 | link_dst_tail(dst_peer, dst_tail); |
360 | } | |
361 | dst_peer->peer_ref = src; | |
362 | } | |
363 | return 0; | |
364 | } | |
365 | ||
2386d658 LT |
366 | enum protocol { |
367 | PROTO_LOCAL = 1, | |
368 | PROTO_SSH, | |
369 | PROTO_GIT, | |
370 | }; | |
371 | ||
372 | static enum protocol get_protocol(const char *name) | |
373 | { | |
374 | if (!strcmp(name, "ssh")) | |
375 | return PROTO_SSH; | |
376 | if (!strcmp(name, "git")) | |
377 | return PROTO_GIT; | |
c05186cc LT |
378 | if (!strcmp(name, "git+ssh")) |
379 | return PROTO_SSH; | |
380 | if (!strcmp(name, "ssh+git")) | |
381 | return PROTO_SSH; | |
2386d658 LT |
382 | die("I don't handle protocol '%s'", name); |
383 | } | |
384 | ||
5ba88448 YH |
385 | #define STR_(s) # s |
386 | #define STR(s) STR_(s) | |
2386d658 | 387 | |
49744d63 | 388 | #ifndef NO_IPV6 |
4c505f71 | 389 | |
5ad312be JL |
390 | /* |
391 | * Returns a connected socket() fd, or else die()s. | |
392 | */ | |
393 | static int git_tcp_connect_sock(char *host) | |
2386d658 | 394 | { |
ac3bc6c1 | 395 | int sockfd = -1, saved_errno = 0; |
5ba88448 | 396 | char *colon, *end; |
554fe20d | 397 | const char *port = STR(DEFAULT_GIT_PORT); |
5ba88448 YH |
398 | struct addrinfo hints, *ai0, *ai; |
399 | int gai; | |
400 | ||
401 | if (host[0] == '[') { | |
402 | end = strchr(host + 1, ']'); | |
403 | if (end) { | |
404 | *end = 0; | |
405 | end++; | |
406 | host++; | |
407 | } else | |
408 | end = host; | |
409 | } else | |
410 | end = host; | |
411 | colon = strchr(end, ':'); | |
412 | ||
ce6f8e7e LT |
413 | if (colon) { |
414 | *colon = 0; | |
5ba88448 | 415 | port = colon + 1; |
ce6f8e7e | 416 | } |
5ba88448 YH |
417 | |
418 | memset(&hints, 0, sizeof(hints)); | |
419 | hints.ai_socktype = SOCK_STREAM; | |
420 | hints.ai_protocol = IPPROTO_TCP; | |
421 | ||
422 | gai = getaddrinfo(host, port, &hints, &ai); | |
423 | if (gai) | |
424 | die("Unable to look up %s (%s)", host, gai_strerror(gai)); | |
425 | ||
426 | for (ai0 = ai; ai; ai = ai->ai_next) { | |
5ad312be JL |
427 | sockfd = socket(ai->ai_family, |
428 | ai->ai_socktype, ai->ai_protocol); | |
ac3bc6c1 PB |
429 | if (sockfd < 0) { |
430 | saved_errno = errno; | |
5ba88448 | 431 | continue; |
ac3bc6c1 | 432 | } |
5ba88448 | 433 | if (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) { |
ac3bc6c1 | 434 | saved_errno = errno; |
5ba88448 YH |
435 | close(sockfd); |
436 | sockfd = -1; | |
437 | continue; | |
2386d658 | 438 | } |
5ba88448 | 439 | break; |
2386d658 LT |
440 | } |
441 | ||
5ba88448 | 442 | freeaddrinfo(ai0); |
2386d658 | 443 | |
2386d658 | 444 | if (sockfd < 0) |
ac3bc6c1 | 445 | die("unable to connect a socket (%s)", strerror(saved_errno)); |
5ba88448 | 446 | |
5ad312be | 447 | return sockfd; |
2386d658 LT |
448 | } |
449 | ||
49744d63 | 450 | #else /* NO_IPV6 */ |
4c505f71 | 451 | |
5ad312be JL |
452 | /* |
453 | * Returns a connected socket() fd, or else die()s. | |
454 | */ | |
455 | static int git_tcp_connect_sock(char *host) | |
4c505f71 | 456 | { |
ac3bc6c1 | 457 | int sockfd = -1, saved_errno = 0; |
4c505f71 PA |
458 | char *colon, *end; |
459 | char *port = STR(DEFAULT_GIT_PORT), *ep; | |
460 | struct hostent *he; | |
461 | struct sockaddr_in sa; | |
462 | char **ap; | |
463 | unsigned int nport; | |
464 | ||
465 | if (host[0] == '[') { | |
466 | end = strchr(host + 1, ']'); | |
467 | if (end) { | |
468 | *end = 0; | |
469 | end++; | |
470 | host++; | |
471 | } else | |
472 | end = host; | |
473 | } else | |
474 | end = host; | |
475 | colon = strchr(end, ':'); | |
476 | ||
477 | if (colon) { | |
478 | *colon = 0; | |
479 | port = colon + 1; | |
480 | } | |
481 | ||
4c505f71 PA |
482 | he = gethostbyname(host); |
483 | if (!he) | |
484 | die("Unable to look up %s (%s)", host, hstrerror(h_errno)); | |
485 | nport = strtoul(port, &ep, 10); | |
486 | if ( ep == port || *ep ) { | |
487 | /* Not numeric */ | |
488 | struct servent *se = getservbyname(port,"tcp"); | |
489 | if ( !se ) | |
490 | die("Unknown port %s\n", port); | |
491 | nport = se->s_port; | |
492 | } | |
493 | ||
494 | for (ap = he->h_addr_list; *ap; ap++) { | |
495 | sockfd = socket(he->h_addrtype, SOCK_STREAM, 0); | |
ac3bc6c1 PB |
496 | if (sockfd < 0) { |
497 | saved_errno = errno; | |
4c505f71 | 498 | continue; |
ac3bc6c1 | 499 | } |
4c505f71 PA |
500 | |
501 | memset(&sa, 0, sizeof sa); | |
502 | sa.sin_family = he->h_addrtype; | |
6573faff | 503 | sa.sin_port = htons(nport); |
c6164218 | 504 | memcpy(&sa.sin_addr, *ap, he->h_length); |
4c505f71 PA |
505 | |
506 | if (connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) { | |
ac3bc6c1 | 507 | saved_errno = errno; |
4c505f71 PA |
508 | close(sockfd); |
509 | sockfd = -1; | |
510 | continue; | |
511 | } | |
512 | break; | |
513 | } | |
514 | ||
515 | if (sockfd < 0) | |
ac3bc6c1 | 516 | die("unable to connect a socket (%s)", strerror(saved_errno)); |
4c505f71 | 517 | |
5ad312be JL |
518 | return sockfd; |
519 | } | |
520 | ||
521 | #endif /* NO_IPV6 */ | |
522 | ||
523 | ||
c78963d2 | 524 | static void git_tcp_connect(int fd[2], char *host) |
5ad312be JL |
525 | { |
526 | int sockfd = git_tcp_connect_sock(host); | |
527 | ||
4c505f71 PA |
528 | fd[0] = sockfd; |
529 | fd[1] = sockfd; | |
4c505f71 PA |
530 | } |
531 | ||
4c505f71 | 532 | |
96f1e58f DR |
533 | static char *git_proxy_command; |
534 | static const char *rhost_name; | |
e814bc4d | 535 | static int rhost_len; |
f8014776 PC |
536 | |
537 | static int git_proxy_command_options(const char *var, const char *value) | |
538 | { | |
e814bc4d | 539 | if (!strcmp(var, "core.gitproxy")) { |
c3df8568 YH |
540 | const char *for_pos; |
541 | int matchlen = -1; | |
542 | int hostlen; | |
543 | ||
e814bc4d | 544 | if (git_proxy_command) |
f8014776 | 545 | return 0; |
e814bc4d JH |
546 | /* [core] |
547 | * ;# matches www.kernel.org as well | |
548 | * gitproxy = netcatter-1 for kernel.org | |
549 | * gitproxy = netcatter-2 for sample.xz | |
550 | * gitproxy = netcatter-default | |
551 | */ | |
c3df8568 | 552 | for_pos = strstr(value, " for "); |
e814bc4d JH |
553 | if (!for_pos) |
554 | /* matches everybody */ | |
555 | matchlen = strlen(value); | |
556 | else { | |
557 | hostlen = strlen(for_pos + 5); | |
558 | if (rhost_len < hostlen) | |
559 | matchlen = -1; | |
560 | else if (!strncmp(for_pos + 5, | |
561 | rhost_name + rhost_len - hostlen, | |
562 | hostlen) && | |
563 | ((rhost_len == hostlen) || | |
564 | rhost_name[rhost_len - hostlen -1] == '.')) | |
565 | matchlen = for_pos - value; | |
566 | else | |
567 | matchlen = -1; | |
568 | } | |
569 | if (0 <= matchlen) { | |
570 | /* core.gitproxy = none for kernel.org */ | |
571 | if (matchlen == 4 && | |
572 | !memcmp(value, "none", 4)) | |
573 | matchlen = 0; | |
574 | git_proxy_command = xmalloc(matchlen + 1); | |
575 | memcpy(git_proxy_command, value, matchlen); | |
576 | git_proxy_command[matchlen] = 0; | |
f8014776 | 577 | } |
e814bc4d | 578 | return 0; |
f8014776 PC |
579 | } |
580 | ||
581 | return git_default_config(var, value); | |
582 | } | |
583 | ||
e814bc4d | 584 | static int git_use_proxy(const char *host) |
f8014776 | 585 | { |
e814bc4d JH |
586 | rhost_name = host; |
587 | rhost_len = strlen(host); | |
f8014776 PC |
588 | git_proxy_command = getenv("GIT_PROXY_COMMAND"); |
589 | git_config(git_proxy_command_options); | |
e814bc4d JH |
590 | rhost_name = NULL; |
591 | return (git_proxy_command && *git_proxy_command); | |
f8014776 PC |
592 | } |
593 | ||
c78963d2 | 594 | static void git_proxy_connect(int fd[2], char *host) |
f8014776 | 595 | { |
554fe20d | 596 | const char *port = STR(DEFAULT_GIT_PORT); |
f8014776 PC |
597 | char *colon, *end; |
598 | int pipefd[2][2]; | |
599 | pid_t pid; | |
600 | ||
601 | if (host[0] == '[') { | |
602 | end = strchr(host + 1, ']'); | |
603 | if (end) { | |
604 | *end = 0; | |
605 | end++; | |
606 | host++; | |
607 | } else | |
608 | end = host; | |
609 | } else | |
610 | end = host; | |
611 | colon = strchr(end, ':'); | |
612 | ||
613 | if (colon) { | |
614 | *colon = 0; | |
615 | port = colon + 1; | |
616 | } | |
617 | ||
618 | if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0) | |
619 | die("unable to create pipe pair for communication"); | |
620 | pid = fork(); | |
621 | if (!pid) { | |
622 | dup2(pipefd[1][0], 0); | |
623 | dup2(pipefd[0][1], 1); | |
624 | close(pipefd[0][0]); | |
625 | close(pipefd[0][1]); | |
626 | close(pipefd[1][0]); | |
627 | close(pipefd[1][1]); | |
628 | execlp(git_proxy_command, git_proxy_command, host, port, NULL); | |
629 | die("exec failed"); | |
630 | } | |
5ad312be JL |
631 | if (pid < 0) |
632 | die("fork failed"); | |
f8014776 PC |
633 | fd[0] = pipefd[0][0]; |
634 | fd[1] = pipefd[1][1]; | |
635 | close(pipefd[0][1]); | |
636 | close(pipefd[1][0]); | |
f8014776 PC |
637 | } |
638 | ||
0f503d77 CC |
639 | #define MAX_CMD_LEN 1024 |
640 | ||
f7192598 | 641 | /* |
f42a5c4e FBH |
642 | * This returns 0 if the transport protocol does not need fork(2), |
643 | * or a process id if it does. Once done, finish the connection | |
644 | * with finish_connect() with the value returned from this function | |
645 | * (it is safe to call finish_connect() with 0 to support the former | |
646 | * case). | |
647 | * | |
648 | * Does not return a negative value on error; it just dies. | |
f7192598 | 649 | */ |
f42a5c4e | 650 | pid_t git_connect(int fd[2], char *url, const char *prog) |
f7192598 | 651 | { |
faea9ccb | 652 | char *host, *path = url; |
356bece0 YH |
653 | char *end; |
654 | int c; | |
f7192598 LT |
655 | int pipefd[2][2]; |
656 | pid_t pid; | |
faea9ccb | 657 | enum protocol protocol = PROTO_LOCAL; |
da2a95b2 | 658 | int free_path = 0; |
faea9ccb | 659 | |
f0b7367c JH |
660 | /* Without this we cannot rely on waitpid() to tell |
661 | * what happened to our children. | |
662 | */ | |
663 | signal(SIGCHLD, SIG_DFL); | |
664 | ||
faea9ccb AE |
665 | host = strstr(url, "://"); |
666 | if(host) { | |
667 | *host = '\0'; | |
668 | protocol = get_protocol(url); | |
669 | host += 3; | |
356bece0 YH |
670 | c = '/'; |
671 | } else { | |
f7192598 | 672 | host = url; |
356bece0 YH |
673 | c = ':'; |
674 | } | |
675 | ||
676 | if (host[0] == '[') { | |
677 | end = strchr(host + 1, ']'); | |
678 | if (end) { | |
679 | *end = 0; | |
680 | end++; | |
681 | host++; | |
682 | } else | |
683 | end = host; | |
684 | } else | |
685 | end = host; | |
686 | ||
687 | path = strchr(end, c); | |
688 | if (c == ':') { | |
689 | if (path) { | |
faea9ccb | 690 | protocol = PROTO_SSH; |
356bece0 YH |
691 | *path++ = '\0'; |
692 | } else | |
693 | path = host; | |
f7192598 | 694 | } |
2386d658 | 695 | |
faea9ccb AE |
696 | if (!path || !*path) |
697 | die("No path specified. See 'man git-pull' for valid url syntax"); | |
698 | ||
699 | /* | |
700 | * null-terminate hostname and point path to ~ for URL's like this: | |
701 | * ssh://host.xz/~user/repo | |
702 | */ | |
703 | if (protocol != PROTO_LOCAL && host != url) { | |
704 | char *ptr = path; | |
705 | if (path[1] == '~') | |
706 | path++; | |
da2a95b2 | 707 | else { |
9befac47 | 708 | path = xstrdup(ptr); |
da2a95b2 SH |
709 | free_path = 1; |
710 | } | |
faea9ccb AE |
711 | |
712 | *ptr = '\0'; | |
713 | } | |
714 | ||
f8014776 | 715 | if (protocol == PROTO_GIT) { |
5ad312be JL |
716 | /* These underlying connection commands die() if they |
717 | * cannot connect. | |
718 | */ | |
9befac47 | 719 | char *target_host = xstrdup(host); |
e814bc4d | 720 | if (git_use_proxy(host)) |
c78963d2 | 721 | git_proxy_connect(fd, host); |
da2a95b2 | 722 | else |
c78963d2 | 723 | git_tcp_connect(fd, host); |
5ad312be JL |
724 | /* |
725 | * Separate original protocol components prog and path | |
726 | * from extended components with a NUL byte. | |
727 | */ | |
728 | packet_write(fd[1], | |
729 | "%s %s%chost=%s%c", | |
730 | prog, path, 0, | |
731 | target_host, 0); | |
732 | free(target_host); | |
da2a95b2 SH |
733 | if (free_path) |
734 | free(path); | |
5ad312be | 735 | return 0; |
f8014776 | 736 | } |
2386d658 | 737 | |
f7192598 LT |
738 | if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0) |
739 | die("unable to create pipe pair for communication"); | |
740 | pid = fork(); | |
c9bc159d PD |
741 | if (pid < 0) |
742 | die("unable to fork"); | |
f7192598 | 743 | if (!pid) { |
0f503d77 CC |
744 | char command[MAX_CMD_LEN]; |
745 | char *posn = command; | |
746 | int size = MAX_CMD_LEN; | |
747 | int of = 0; | |
748 | ||
749 | of |= add_to_string(&posn, &size, prog, 0); | |
750 | of |= add_to_string(&posn, &size, " ", 0); | |
751 | of |= add_to_string(&posn, &size, path, 1); | |
752 | ||
753 | if (of) | |
754 | die("command line too long"); | |
755 | ||
f7192598 LT |
756 | dup2(pipefd[1][0], 0); |
757 | dup2(pipefd[0][1], 1); | |
758 | close(pipefd[0][0]); | |
759 | close(pipefd[0][1]); | |
760 | close(pipefd[1][0]); | |
761 | close(pipefd[1][1]); | |
4852f723 | 762 | if (protocol == PROTO_SSH) { |
c7c81b3a JR |
763 | const char *ssh, *ssh_basename; |
764 | ssh = getenv("GIT_SSH"); | |
765 | if (!ssh) ssh = "ssh"; | |
766 | ssh_basename = strrchr(ssh, '/'); | |
4852f723 MS |
767 | if (!ssh_basename) |
768 | ssh_basename = ssh; | |
769 | else | |
770 | ssh_basename++; | |
771 | execlp(ssh, ssh_basename, host, command, NULL); | |
772 | } | |
016fb48b MD |
773 | else { |
774 | unsetenv(ALTERNATE_DB_ENVIRONMENT); | |
775 | unsetenv(DB_ENVIRONMENT); | |
776 | unsetenv(GIT_DIR_ENVIRONMENT); | |
777 | unsetenv(GRAFT_ENVIRONMENT); | |
778 | unsetenv(INDEX_ENVIRONMENT); | |
f7192598 | 779 | execlp("sh", "sh", "-c", command, NULL); |
016fb48b | 780 | } |
f7192598 | 781 | die("exec failed"); |
016fb48b | 782 | } |
f7192598 LT |
783 | fd[0] = pipefd[0][0]; |
784 | fd[1] = pipefd[1][1]; | |
785 | close(pipefd[0][1]); | |
786 | close(pipefd[1][0]); | |
da2a95b2 SH |
787 | if (free_path) |
788 | free(path); | |
f7192598 LT |
789 | return pid; |
790 | } | |
791 | ||
792 | int finish_connect(pid_t pid) | |
793 | { | |
f42a5c4e FBH |
794 | if (pid == 0) |
795 | return 0; | |
796 | ||
53e1a761 | 797 | while (waitpid(pid, NULL, 0) < 0) { |
f7192598 | 798 | if (errno != EINTR) |
53e1a761 | 799 | return -1; |
f7192598 | 800 | } |
53e1a761 | 801 | return 0; |
f7192598 | 802 | } |