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Commit | Line | Data |
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6eb996b5 DB |
1 | #include "cache.h" |
2 | #include "transport.h" | |
ae4efe19 | 3 | #include "quote.h" |
6eb996b5 DB |
4 | #include "run-command.h" |
5 | #include "commit.h" | |
6 | #include "diff.h" | |
7 | #include "revision.h" | |
ef08ef9e | 8 | #include "quote.h" |
72ff8943 | 9 | #include "remote.h" |
73b49a75 | 10 | #include "string-list.h" |
7851b1e6 | 11 | #include "thread-utils.h" |
7851b1e6 | 12 | |
bf3c523c IL |
13 | static int debug; |
14 | ||
9cba13ca | 15 | struct helper_data { |
6eb996b5 DB |
16 | const char *name; |
17 | struct child_process *helper; | |
292ce46b | 18 | FILE *out; |
ef08ef9e | 19 | unsigned fetch : 1, |
a24a32dd | 20 | import : 1, |
73b49a75 | 21 | export : 1, |
ae4efe19 | 22 | option : 1, |
fa8c097c IL |
23 | push : 1, |
24 | connect : 1, | |
25 | no_disconnect_req : 1; | |
72ff8943 DB |
26 | /* These go from remote name (as in "list") to private name */ |
27 | struct refspec *refspecs; | |
28 | int refspec_nr; | |
61b075bd IL |
29 | /* Transport options for fetch-pack/send-pack (should one of |
30 | * those be invoked). | |
31 | */ | |
32 | struct git_transport_options transport_options; | |
6eb996b5 DB |
33 | }; |
34 | ||
bf3c523c IL |
35 | static void sendline(struct helper_data *helper, struct strbuf *buffer) |
36 | { | |
37 | if (debug) | |
38 | fprintf(stderr, "Debug: Remote helper: -> %s", buffer->buf); | |
39 | if (write_in_full(helper->helper->in, buffer->buf, buffer->len) | |
40 | != buffer->len) | |
41 | die_errno("Full write to remote helper failed"); | |
42 | } | |
43 | ||
fa8c097c | 44 | static int recvline_fh(FILE *helper, struct strbuf *buffer) |
bf3c523c IL |
45 | { |
46 | strbuf_reset(buffer); | |
47 | if (debug) | |
48 | fprintf(stderr, "Debug: Remote helper: Waiting...\n"); | |
fa8c097c | 49 | if (strbuf_getline(buffer, helper, '\n') == EOF) { |
bf3c523c IL |
50 | if (debug) |
51 | fprintf(stderr, "Debug: Remote helper quit.\n"); | |
52 | exit(128); | |
53 | } | |
54 | ||
55 | if (debug) | |
56 | fprintf(stderr, "Debug: Remote helper: <- %s\n", buffer->buf); | |
57 | return 0; | |
58 | } | |
59 | ||
fa8c097c IL |
60 | static int recvline(struct helper_data *helper, struct strbuf *buffer) |
61 | { | |
62 | return recvline_fh(helper->out, buffer); | |
63 | } | |
64 | ||
bf3c523c IL |
65 | static void xchgline(struct helper_data *helper, struct strbuf *buffer) |
66 | { | |
67 | sendline(helper, buffer); | |
68 | recvline(helper, buffer); | |
69 | } | |
70 | ||
71 | static void write_constant(int fd, const char *str) | |
72 | { | |
73 | if (debug) | |
74 | fprintf(stderr, "Debug: Remote helper: -> %s", str); | |
75 | if (write_in_full(fd, str, strlen(str)) != strlen(str)) | |
76 | die_errno("Full write to remote helper failed"); | |
77 | } | |
78 | ||
c2e86add | 79 | static const char *remove_ext_force(const char *url) |
25d5cc48 IL |
80 | { |
81 | if (url) { | |
82 | const char *colon = strchr(url, ':'); | |
83 | if (colon && colon[1] == ':') | |
84 | return colon + 2; | |
85 | } | |
86 | return url; | |
87 | } | |
88 | ||
fa8c097c IL |
89 | static void do_take_over(struct transport *transport) |
90 | { | |
91 | struct helper_data *data; | |
92 | data = (struct helper_data *)transport->data; | |
93 | transport_take_over(transport, data->helper); | |
94 | fclose(data->out); | |
95 | free(data); | |
96 | } | |
97 | ||
6eb996b5 DB |
98 | static struct child_process *get_helper(struct transport *transport) |
99 | { | |
100 | struct helper_data *data = transport->data; | |
101 | struct strbuf buf = STRBUF_INIT; | |
102 | struct child_process *helper; | |
72ff8943 DB |
103 | const char **refspecs = NULL; |
104 | int refspec_nr = 0; | |
105 | int refspec_alloc = 0; | |
61b075bd | 106 | int duped; |
6b02de3b | 107 | int code; |
e1735872 DI |
108 | char git_dir_buf[sizeof(GIT_DIR_ENVIRONMENT) + PATH_MAX + 1]; |
109 | const char *helper_env[] = { | |
110 | git_dir_buf, | |
111 | NULL | |
112 | }; | |
113 | ||
6eb996b5 DB |
114 | |
115 | if (data->helper) | |
116 | return data->helper; | |
117 | ||
118 | helper = xcalloc(1, sizeof(*helper)); | |
119 | helper->in = -1; | |
120 | helper->out = -1; | |
121 | helper->err = 0; | |
122 | helper->argv = xcalloc(4, sizeof(*helper->argv)); | |
6b02de3b | 123 | strbuf_addf(&buf, "git-remote-%s", data->name); |
6eb996b5 DB |
124 | helper->argv[0] = strbuf_detach(&buf, NULL); |
125 | helper->argv[1] = transport->remote->name; | |
25d5cc48 | 126 | helper->argv[2] = remove_ext_force(transport->url); |
6b02de3b IL |
127 | helper->git_cmd = 0; |
128 | helper->silent_exec_failure = 1; | |
e1735872 DI |
129 | |
130 | snprintf(git_dir_buf, sizeof(git_dir_buf), "%s=%s", GIT_DIR_ENVIRONMENT, get_git_dir()); | |
131 | helper->env = helper_env; | |
132 | ||
6b02de3b IL |
133 | code = start_command(helper); |
134 | if (code < 0 && errno == ENOENT) | |
135 | die("Unable to find remote helper for '%s'", data->name); | |
136 | else if (code != 0) | |
137 | exit(code); | |
138 | ||
6eb996b5 | 139 | data->helper = helper; |
fa8c097c | 140 | data->no_disconnect_req = 0; |
6eb996b5 | 141 | |
61b075bd IL |
142 | /* |
143 | * Open the output as FILE* so strbuf_getline() can be used. | |
144 | * Do this with duped fd because fclose() will close the fd, | |
145 | * and stuff like taking over will require the fd to remain. | |
61b075bd IL |
146 | */ |
147 | duped = dup(helper->out); | |
148 | if (duped < 0) | |
149 | die_errno("Can't dup helper output fd"); | |
150 | data->out = xfdopen(duped, "r"); | |
151 | ||
bf3c523c | 152 | write_constant(helper->in, "capabilities\n"); |
2d14d65c | 153 | |
6eb996b5 | 154 | while (1) { |
28ed5b35 IL |
155 | const char *capname; |
156 | int mandatory = 0; | |
bf3c523c | 157 | recvline(data, &buf); |
6eb996b5 DB |
158 | |
159 | if (!*buf.buf) | |
160 | break; | |
28ed5b35 IL |
161 | |
162 | if (*buf.buf == '*') { | |
163 | capname = buf.buf + 1; | |
164 | mandatory = 1; | |
165 | } else | |
166 | capname = buf.buf; | |
167 | ||
bf3c523c | 168 | if (debug) |
28ed5b35 IL |
169 | fprintf(stderr, "Debug: Got cap %s\n", capname); |
170 | if (!strcmp(capname, "fetch")) | |
6eb996b5 | 171 | data->fetch = 1; |
28ed5b35 | 172 | else if (!strcmp(capname, "option")) |
ef08ef9e | 173 | data->option = 1; |
28ed5b35 | 174 | else if (!strcmp(capname, "push")) |
ae4efe19 | 175 | data->push = 1; |
28ed5b35 | 176 | else if (!strcmp(capname, "import")) |
e65e91ed | 177 | data->import = 1; |
73b49a75 SR |
178 | else if (!strcmp(capname, "export")) |
179 | data->export = 1; | |
28ed5b35 | 180 | else if (!data->refspecs && !prefixcmp(capname, "refspec ")) { |
72ff8943 DB |
181 | ALLOC_GROW(refspecs, |
182 | refspec_nr + 1, | |
183 | refspec_alloc); | |
184 | refspecs[refspec_nr++] = strdup(buf.buf + strlen("refspec ")); | |
fa8c097c IL |
185 | } else if (!strcmp(capname, "connect")) { |
186 | data->connect = 1; | |
28ed5b35 | 187 | } else if (mandatory) { |
9517e6b8 | 188 | die("Unknown mandatory capability %s. This remote " |
28ed5b35 IL |
189 | "helper probably needs newer version of Git.\n", |
190 | capname); | |
72ff8943 DB |
191 | } |
192 | } | |
193 | if (refspecs) { | |
194 | int i; | |
195 | data->refspec_nr = refspec_nr; | |
196 | data->refspecs = parse_fetch_refspec(refspec_nr, refspecs); | |
197 | for (i = 0; i < refspec_nr; i++) { | |
198 | free((char *)refspecs[i]); | |
199 | } | |
200 | free(refspecs); | |
6eb996b5 | 201 | } |
b962dbdc | 202 | strbuf_release(&buf); |
bf3c523c IL |
203 | if (debug) |
204 | fprintf(stderr, "Debug: Capabilities complete.\n"); | |
6eb996b5 DB |
205 | return data->helper; |
206 | } | |
207 | ||
208 | static int disconnect_helper(struct transport *transport) | |
209 | { | |
210 | struct helper_data *data = transport->data; | |
bf3c523c IL |
211 | struct strbuf buf = STRBUF_INIT; |
212 | ||
6eb996b5 | 213 | if (data->helper) { |
bf3c523c IL |
214 | if (debug) |
215 | fprintf(stderr, "Debug: Disconnecting.\n"); | |
fa8c097c IL |
216 | if (!data->no_disconnect_req) { |
217 | strbuf_addf(&buf, "\n"); | |
218 | sendline(data, &buf); | |
219 | } | |
6eb996b5 | 220 | close(data->helper->in); |
61b075bd | 221 | close(data->helper->out); |
292ce46b | 222 | fclose(data->out); |
6eb996b5 DB |
223 | finish_command(data->helper); |
224 | free((char *)data->helper->argv[0]); | |
225 | free(data->helper->argv); | |
226 | free(data->helper); | |
227 | data->helper = NULL; | |
228 | } | |
229 | return 0; | |
230 | } | |
231 | ||
ef08ef9e SP |
232 | static const char *unsupported_options[] = { |
233 | TRANS_OPT_UPLOADPACK, | |
234 | TRANS_OPT_RECEIVEPACK, | |
235 | TRANS_OPT_THIN, | |
236 | TRANS_OPT_KEEP | |
237 | }; | |
238 | static const char *boolean_options[] = { | |
239 | TRANS_OPT_THIN, | |
240 | TRANS_OPT_KEEP, | |
241 | TRANS_OPT_FOLLOWTAGS | |
242 | }; | |
243 | ||
244 | static int set_helper_option(struct transport *transport, | |
245 | const char *name, const char *value) | |
246 | { | |
247 | struct helper_data *data = transport->data; | |
ef08ef9e SP |
248 | struct strbuf buf = STRBUF_INIT; |
249 | int i, ret, is_bool = 0; | |
250 | ||
bf3c523c IL |
251 | get_helper(transport); |
252 | ||
ef08ef9e SP |
253 | if (!data->option) |
254 | return 1; | |
255 | ||
256 | for (i = 0; i < ARRAY_SIZE(unsupported_options); i++) { | |
257 | if (!strcmp(name, unsupported_options[i])) | |
258 | return 1; | |
259 | } | |
260 | ||
261 | for (i = 0; i < ARRAY_SIZE(boolean_options); i++) { | |
262 | if (!strcmp(name, boolean_options[i])) { | |
263 | is_bool = 1; | |
264 | break; | |
265 | } | |
266 | } | |
267 | ||
268 | strbuf_addf(&buf, "option %s ", name); | |
269 | if (is_bool) | |
270 | strbuf_addstr(&buf, value ? "true" : "false"); | |
271 | else | |
272 | quote_c_style(value, &buf, NULL, 0); | |
273 | strbuf_addch(&buf, '\n'); | |
274 | ||
bf3c523c | 275 | xchgline(data, &buf); |
ef08ef9e SP |
276 | |
277 | if (!strcmp(buf.buf, "ok")) | |
278 | ret = 0; | |
279 | else if (!prefixcmp(buf.buf, "error")) { | |
280 | ret = -1; | |
281 | } else if (!strcmp(buf.buf, "unsupported")) | |
282 | ret = 1; | |
283 | else { | |
284 | warning("%s unexpectedly said: '%s'", data->name, buf.buf); | |
285 | ret = 1; | |
286 | } | |
287 | strbuf_release(&buf); | |
288 | return ret; | |
289 | } | |
290 | ||
291 | static void standard_options(struct transport *t) | |
292 | { | |
293 | char buf[16]; | |
294 | int n; | |
295 | int v = t->verbose; | |
ef08ef9e | 296 | |
d01b3c02 | 297 | set_helper_option(t, "progress", t->progress ? "true" : "false"); |
ef08ef9e SP |
298 | |
299 | n = snprintf(buf, sizeof(buf), "%d", v + 1); | |
300 | if (n >= sizeof(buf)) | |
301 | die("impossibly large verbosity value"); | |
302 | set_helper_option(t, "verbosity", buf); | |
303 | } | |
304 | ||
f2a37151 DB |
305 | static int release_helper(struct transport *transport) |
306 | { | |
72ff8943 DB |
307 | struct helper_data *data = transport->data; |
308 | free_refspec(data->refspec_nr, data->refspecs); | |
309 | data->refspecs = NULL; | |
f2a37151 DB |
310 | disconnect_helper(transport); |
311 | free(transport->data); | |
312 | return 0; | |
313 | } | |
314 | ||
6eb996b5 | 315 | static int fetch_with_fetch(struct transport *transport, |
37148311 | 316 | int nr_heads, struct ref **to_fetch) |
6eb996b5 | 317 | { |
292ce46b | 318 | struct helper_data *data = transport->data; |
6eb996b5 DB |
319 | int i; |
320 | struct strbuf buf = STRBUF_INIT; | |
321 | ||
ef08ef9e SP |
322 | standard_options(transport); |
323 | ||
6eb996b5 | 324 | for (i = 0; i < nr_heads; i++) { |
1088261f | 325 | const struct ref *posn = to_fetch[i]; |
6eb996b5 DB |
326 | if (posn->status & REF_STATUS_UPTODATE) |
327 | continue; | |
2d14d65c DB |
328 | |
329 | strbuf_addf(&buf, "fetch %s %s\n", | |
330 | sha1_to_hex(posn->old_sha1), posn->name); | |
292ce46b | 331 | } |
2d14d65c | 332 | |
292ce46b | 333 | strbuf_addch(&buf, '\n'); |
bf3c523c | 334 | sendline(data, &buf); |
292ce46b SP |
335 | |
336 | while (1) { | |
bf3c523c | 337 | recvline(data, &buf); |
292ce46b SP |
338 | |
339 | if (!prefixcmp(buf.buf, "lock ")) { | |
340 | const char *name = buf.buf + 5; | |
341 | if (transport->pack_lockfile) | |
342 | warning("%s also locked %s", data->name, name); | |
343 | else | |
344 | transport->pack_lockfile = xstrdup(name); | |
345 | } | |
346 | else if (!buf.len) | |
347 | break; | |
348 | else | |
349 | warning("%s unexpectedly said: '%s'", data->name, buf.buf); | |
6eb996b5 | 350 | } |
292ce46b | 351 | strbuf_release(&buf); |
6eb996b5 DB |
352 | return 0; |
353 | } | |
354 | ||
e65e91ed DB |
355 | static int get_importer(struct transport *transport, struct child_process *fastimport) |
356 | { | |
357 | struct child_process *helper = get_helper(transport); | |
358 | memset(fastimport, 0, sizeof(*fastimport)); | |
359 | fastimport->in = helper->out; | |
360 | fastimport->argv = xcalloc(5, sizeof(*fastimport->argv)); | |
361 | fastimport->argv[0] = "fast-import"; | |
362 | fastimport->argv[1] = "--quiet"; | |
363 | ||
364 | fastimport->git_cmd = 1; | |
365 | return start_command(fastimport); | |
366 | } | |
367 | ||
73b49a75 SR |
368 | static int get_exporter(struct transport *transport, |
369 | struct child_process *fastexport, | |
370 | const char *export_marks, | |
371 | const char *import_marks, | |
372 | struct string_list *revlist_args) | |
373 | { | |
374 | struct child_process *helper = get_helper(transport); | |
375 | int argc = 0, i; | |
376 | memset(fastexport, 0, sizeof(*fastexport)); | |
377 | ||
378 | /* we need to duplicate helper->in because we want to use it after | |
379 | * fastexport is done with it. */ | |
380 | fastexport->out = dup(helper->in); | |
381 | fastexport->argv = xcalloc(4 + revlist_args->nr, sizeof(*fastexport->argv)); | |
382 | fastexport->argv[argc++] = "fast-export"; | |
383 | if (export_marks) | |
384 | fastexport->argv[argc++] = export_marks; | |
385 | if (import_marks) | |
386 | fastexport->argv[argc++] = import_marks; | |
387 | ||
388 | for (i = 0; i < revlist_args->nr; i++) | |
389 | fastexport->argv[argc++] = revlist_args->items[i].string; | |
390 | ||
391 | fastexport->git_cmd = 1; | |
392 | return start_command(fastexport); | |
393 | } | |
394 | ||
e65e91ed DB |
395 | static int fetch_with_import(struct transport *transport, |
396 | int nr_heads, struct ref **to_fetch) | |
397 | { | |
398 | struct child_process fastimport; | |
72ff8943 | 399 | struct helper_data *data = transport->data; |
e65e91ed DB |
400 | int i; |
401 | struct ref *posn; | |
402 | struct strbuf buf = STRBUF_INIT; | |
403 | ||
bf3c523c IL |
404 | get_helper(transport); |
405 | ||
e65e91ed DB |
406 | if (get_importer(transport, &fastimport)) |
407 | die("Couldn't run fast-import"); | |
408 | ||
409 | for (i = 0; i < nr_heads; i++) { | |
410 | posn = to_fetch[i]; | |
411 | if (posn->status & REF_STATUS_UPTODATE) | |
412 | continue; | |
413 | ||
414 | strbuf_addf(&buf, "import %s\n", posn->name); | |
bf3c523c | 415 | sendline(data, &buf); |
e65e91ed DB |
416 | strbuf_reset(&buf); |
417 | } | |
418 | disconnect_helper(transport); | |
419 | finish_command(&fastimport); | |
b962dbdc SR |
420 | free(fastimport.argv); |
421 | fastimport.argv = NULL; | |
e65e91ed DB |
422 | |
423 | for (i = 0; i < nr_heads; i++) { | |
72ff8943 | 424 | char *private; |
e65e91ed DB |
425 | posn = to_fetch[i]; |
426 | if (posn->status & REF_STATUS_UPTODATE) | |
427 | continue; | |
72ff8943 DB |
428 | if (data->refspecs) |
429 | private = apply_refspecs(data->refspecs, data->refspec_nr, posn->name); | |
430 | else | |
431 | private = strdup(posn->name); | |
432 | read_ref(private, posn->old_sha1); | |
433 | free(private); | |
e65e91ed | 434 | } |
b962dbdc | 435 | strbuf_release(&buf); |
e65e91ed DB |
436 | return 0; |
437 | } | |
438 | ||
fa8c097c IL |
439 | static int process_connect_service(struct transport *transport, |
440 | const char *name, const char *exec) | |
441 | { | |
442 | struct helper_data *data = transport->data; | |
443 | struct strbuf cmdbuf = STRBUF_INIT; | |
444 | struct child_process *helper; | |
445 | int r, duped, ret = 0; | |
446 | FILE *input; | |
447 | ||
448 | helper = get_helper(transport); | |
449 | ||
450 | /* | |
451 | * Yes, dup the pipe another time, as we need unbuffered version | |
452 | * of input pipe as FILE*. fclose() closes the underlying fd and | |
453 | * stream buffering only can be changed before first I/O operation | |
454 | * on it. | |
455 | */ | |
456 | duped = dup(helper->out); | |
457 | if (duped < 0) | |
458 | die_errno("Can't dup helper output fd"); | |
459 | input = xfdopen(duped, "r"); | |
460 | setvbuf(input, NULL, _IONBF, 0); | |
461 | ||
462 | /* | |
463 | * Handle --upload-pack and friends. This is fire and forget... | |
464 | * just warn if it fails. | |
465 | */ | |
466 | if (strcmp(name, exec)) { | |
467 | r = set_helper_option(transport, "servpath", exec); | |
468 | if (r > 0) | |
469 | warning("Setting remote service path not supported by protocol."); | |
470 | else if (r < 0) | |
471 | warning("Invalid remote service path."); | |
472 | } | |
473 | ||
474 | if (data->connect) | |
475 | strbuf_addf(&cmdbuf, "connect %s\n", name); | |
476 | else | |
477 | goto exit; | |
478 | ||
479 | sendline(data, &cmdbuf); | |
480 | recvline_fh(input, &cmdbuf); | |
481 | if (!strcmp(cmdbuf.buf, "")) { | |
482 | data->no_disconnect_req = 1; | |
483 | if (debug) | |
484 | fprintf(stderr, "Debug: Smart transport connection " | |
485 | "ready.\n"); | |
486 | ret = 1; | |
487 | } else if (!strcmp(cmdbuf.buf, "fallback")) { | |
488 | if (debug) | |
489 | fprintf(stderr, "Debug: Falling back to dumb " | |
490 | "transport.\n"); | |
491 | } else | |
492 | die("Unknown response to connect: %s", | |
493 | cmdbuf.buf); | |
494 | ||
495 | exit: | |
496 | fclose(input); | |
497 | return ret; | |
498 | } | |
499 | ||
500 | static int process_connect(struct transport *transport, | |
501 | int for_push) | |
502 | { | |
503 | struct helper_data *data = transport->data; | |
504 | const char *name; | |
505 | const char *exec; | |
506 | ||
507 | name = for_push ? "git-receive-pack" : "git-upload-pack"; | |
508 | if (for_push) | |
509 | exec = data->transport_options.receivepack; | |
510 | else | |
511 | exec = data->transport_options.uploadpack; | |
512 | ||
513 | return process_connect_service(transport, name, exec); | |
514 | } | |
515 | ||
b236752a IL |
516 | static int connect_helper(struct transport *transport, const char *name, |
517 | const char *exec, int fd[2]) | |
518 | { | |
519 | struct helper_data *data = transport->data; | |
520 | ||
521 | /* Get_helper so connect is inited. */ | |
522 | get_helper(transport); | |
523 | if (!data->connect) | |
524 | die("Operation not supported by protocol."); | |
525 | ||
526 | if (!process_connect_service(transport, name, exec)) | |
527 | die("Can't connect to subservice %s.", name); | |
528 | ||
529 | fd[0] = data->helper->out; | |
530 | fd[1] = data->helper->in; | |
531 | return 0; | |
532 | } | |
533 | ||
6eb996b5 | 534 | static int fetch(struct transport *transport, |
37148311 | 535 | int nr_heads, struct ref **to_fetch) |
6eb996b5 DB |
536 | { |
537 | struct helper_data *data = transport->data; | |
538 | int i, count; | |
539 | ||
fa8c097c IL |
540 | if (process_connect(transport, 0)) { |
541 | do_take_over(transport); | |
542 | return transport->fetch(transport, nr_heads, to_fetch); | |
543 | } | |
544 | ||
6eb996b5 DB |
545 | count = 0; |
546 | for (i = 0; i < nr_heads; i++) | |
547 | if (!(to_fetch[i]->status & REF_STATUS_UPTODATE)) | |
548 | count++; | |
549 | ||
550 | if (!count) | |
551 | return 0; | |
552 | ||
553 | if (data->fetch) | |
554 | return fetch_with_fetch(transport, nr_heads, to_fetch); | |
555 | ||
e65e91ed DB |
556 | if (data->import) |
557 | return fetch_with_import(transport, nr_heads, to_fetch); | |
558 | ||
6eb996b5 DB |
559 | return -1; |
560 | } | |
561 | ||
d2e73c6f SR |
562 | static void push_update_ref_status(struct strbuf *buf, |
563 | struct ref **ref, | |
564 | struct ref *remote_refs) | |
565 | { | |
566 | char *refname, *msg; | |
567 | int status; | |
568 | ||
569 | if (!prefixcmp(buf->buf, "ok ")) { | |
570 | status = REF_STATUS_OK; | |
571 | refname = buf->buf + 3; | |
572 | } else if (!prefixcmp(buf->buf, "error ")) { | |
573 | status = REF_STATUS_REMOTE_REJECT; | |
574 | refname = buf->buf + 6; | |
575 | } else | |
576 | die("expected ok/error, helper said '%s'\n", buf->buf); | |
577 | ||
578 | msg = strchr(refname, ' '); | |
579 | if (msg) { | |
580 | struct strbuf msg_buf = STRBUF_INIT; | |
581 | const char *end; | |
582 | ||
583 | *msg++ = '\0'; | |
584 | if (!unquote_c_style(&msg_buf, msg, &end)) | |
585 | msg = strbuf_detach(&msg_buf, NULL); | |
586 | else | |
587 | msg = xstrdup(msg); | |
588 | strbuf_release(&msg_buf); | |
589 | ||
590 | if (!strcmp(msg, "no match")) { | |
591 | status = REF_STATUS_NONE; | |
592 | free(msg); | |
593 | msg = NULL; | |
594 | } | |
595 | else if (!strcmp(msg, "up to date")) { | |
596 | status = REF_STATUS_UPTODATE; | |
597 | free(msg); | |
598 | msg = NULL; | |
599 | } | |
600 | else if (!strcmp(msg, "non-fast forward")) { | |
601 | status = REF_STATUS_REJECT_NONFASTFORWARD; | |
602 | free(msg); | |
603 | msg = NULL; | |
604 | } | |
605 | } | |
606 | ||
607 | if (*ref) | |
608 | *ref = find_ref_by_name(*ref, refname); | |
609 | if (!*ref) | |
610 | *ref = find_ref_by_name(remote_refs, refname); | |
611 | if (!*ref) { | |
612 | warning("helper reported unexpected status of %s", refname); | |
613 | return; | |
614 | } | |
615 | ||
616 | if ((*ref)->status != REF_STATUS_NONE) { | |
617 | /* | |
618 | * Earlier, the ref was marked not to be pushed, so ignore the ref | |
619 | * status reported by the remote helper if the latter is 'no match'. | |
620 | */ | |
621 | if (status == REF_STATUS_NONE) | |
622 | return; | |
623 | } | |
624 | ||
625 | (*ref)->status = status; | |
626 | (*ref)->remote_status = msg; | |
627 | } | |
628 | ||
629 | static void push_update_refs_status(struct helper_data *data, | |
630 | struct ref *remote_refs) | |
631 | { | |
632 | struct strbuf buf = STRBUF_INIT; | |
633 | struct ref *ref = remote_refs; | |
634 | for (;;) { | |
635 | recvline(data, &buf); | |
636 | if (!buf.len) | |
637 | break; | |
638 | ||
639 | push_update_ref_status(&buf, &ref, remote_refs); | |
640 | } | |
641 | strbuf_release(&buf); | |
642 | } | |
643 | ||
73b49a75 | 644 | static int push_refs_with_push(struct transport *transport, |
ae4efe19 SP |
645 | struct ref *remote_refs, int flags) |
646 | { | |
647 | int force_all = flags & TRANSPORT_PUSH_FORCE; | |
648 | int mirror = flags & TRANSPORT_PUSH_MIRROR; | |
649 | struct helper_data *data = transport->data; | |
650 | struct strbuf buf = STRBUF_INIT; | |
ae4efe19 SP |
651 | struct ref *ref; |
652 | ||
c0aa335c | 653 | get_helper(transport); |
ae4efe19 SP |
654 | if (!data->push) |
655 | return 1; | |
656 | ||
657 | for (ref = remote_refs; ref; ref = ref->next) { | |
20e8b465 | 658 | if (!ref->peer_ref && !mirror) |
ae4efe19 SP |
659 | continue; |
660 | ||
20e8b465 TRC |
661 | /* Check for statuses set by set_ref_status_for_push() */ |
662 | switch (ref->status) { | |
663 | case REF_STATUS_REJECT_NONFASTFORWARD: | |
664 | case REF_STATUS_UPTODATE: | |
ae4efe19 | 665 | continue; |
20e8b465 TRC |
666 | default: |
667 | ; /* do nothing */ | |
ae4efe19 SP |
668 | } |
669 | ||
670 | if (force_all) | |
671 | ref->force = 1; | |
672 | ||
673 | strbuf_addstr(&buf, "push "); | |
674 | if (!ref->deletion) { | |
675 | if (ref->force) | |
676 | strbuf_addch(&buf, '+'); | |
677 | if (ref->peer_ref) | |
678 | strbuf_addstr(&buf, ref->peer_ref->name); | |
679 | else | |
680 | strbuf_addstr(&buf, sha1_to_hex(ref->new_sha1)); | |
681 | } | |
682 | strbuf_addch(&buf, ':'); | |
683 | strbuf_addstr(&buf, ref->name); | |
684 | strbuf_addch(&buf, '\n'); | |
685 | } | |
d8f67d20 CB |
686 | if (buf.len == 0) |
687 | return 0; | |
ae4efe19 | 688 | |
ae4efe19 SP |
689 | standard_options(transport); |
690 | ||
691 | if (flags & TRANSPORT_PUSH_DRY_RUN) { | |
692 | if (set_helper_option(transport, "dry-run", "true") != 0) | |
693 | die("helper %s does not support dry-run", data->name); | |
694 | } | |
695 | ||
696 | strbuf_addch(&buf, '\n'); | |
bf3c523c | 697 | sendline(data, &buf); |
ae4efe19 | 698 | strbuf_release(&buf); |
d2e73c6f SR |
699 | |
700 | push_update_refs_status(data, remote_refs); | |
ae4efe19 SP |
701 | return 0; |
702 | } | |
703 | ||
73b49a75 SR |
704 | static int push_refs_with_export(struct transport *transport, |
705 | struct ref *remote_refs, int flags) | |
706 | { | |
707 | struct ref *ref; | |
708 | struct child_process *helper, exporter; | |
709 | struct helper_data *data = transport->data; | |
710 | char *export_marks = NULL, *import_marks = NULL; | |
183113a5 | 711 | struct string_list revlist_args = STRING_LIST_INIT_NODUP; |
73b49a75 SR |
712 | struct strbuf buf = STRBUF_INIT; |
713 | ||
714 | helper = get_helper(transport); | |
715 | ||
716 | write_constant(helper->in, "export\n"); | |
717 | ||
718 | recvline(data, &buf); | |
719 | if (debug) | |
720 | fprintf(stderr, "Debug: Got export_marks '%s'\n", buf.buf); | |
721 | if (buf.len) { | |
722 | struct strbuf arg = STRBUF_INIT; | |
723 | strbuf_addstr(&arg, "--export-marks="); | |
724 | strbuf_addbuf(&arg, &buf); | |
725 | export_marks = strbuf_detach(&arg, NULL); | |
726 | } | |
727 | ||
728 | recvline(data, &buf); | |
729 | if (debug) | |
730 | fprintf(stderr, "Debug: Got import_marks '%s'\n", buf.buf); | |
731 | if (buf.len) { | |
732 | struct strbuf arg = STRBUF_INIT; | |
733 | strbuf_addstr(&arg, "--import-marks="); | |
734 | strbuf_addbuf(&arg, &buf); | |
735 | import_marks = strbuf_detach(&arg, NULL); | |
736 | } | |
737 | ||
738 | strbuf_reset(&buf); | |
739 | ||
740 | for (ref = remote_refs; ref; ref = ref->next) { | |
741 | char *private; | |
742 | unsigned char sha1[20]; | |
743 | ||
744 | if (!data->refspecs) | |
745 | continue; | |
746 | private = apply_refspecs(data->refspecs, data->refspec_nr, ref->name); | |
747 | if (private && !get_sha1(private, sha1)) { | |
748 | strbuf_addf(&buf, "^%s", private); | |
1d2f80fa | 749 | string_list_append(&revlist_args, strbuf_detach(&buf, NULL)); |
73b49a75 | 750 | } |
2faa1527 | 751 | free(private); |
73b49a75 | 752 | |
3ea7d094 JK |
753 | if (ref->peer_ref) |
754 | string_list_append(&revlist_args, ref->peer_ref->name); | |
73b49a75 SR |
755 | |
756 | } | |
757 | ||
758 | if (get_exporter(transport, &exporter, | |
759 | export_marks, import_marks, &revlist_args)) | |
760 | die("Couldn't run fast-export"); | |
761 | ||
762 | data->no_disconnect_req = 1; | |
763 | finish_command(&exporter); | |
764 | disconnect_helper(transport); | |
765 | return 0; | |
766 | } | |
767 | ||
768 | static int push_refs(struct transport *transport, | |
769 | struct ref *remote_refs, int flags) | |
770 | { | |
771 | struct helper_data *data = transport->data; | |
772 | ||
773 | if (process_connect(transport, 1)) { | |
774 | do_take_over(transport); | |
775 | return transport->push_refs(transport, remote_refs, flags); | |
776 | } | |
777 | ||
778 | if (!remote_refs) { | |
779 | fprintf(stderr, "No refs in common and none specified; doing nothing.\n" | |
780 | "Perhaps you should specify a branch such as 'master'.\n"); | |
781 | return 0; | |
782 | } | |
783 | ||
784 | if (data->push) | |
785 | return push_refs_with_push(transport, remote_refs, flags); | |
786 | ||
787 | if (data->export) | |
788 | return push_refs_with_export(transport, remote_refs, flags); | |
789 | ||
790 | return -1; | |
791 | } | |
792 | ||
793 | ||
f8ec9167 DB |
794 | static int has_attribute(const char *attrs, const char *attr) { |
795 | int len; | |
796 | if (!attrs) | |
797 | return 0; | |
798 | ||
799 | len = strlen(attr); | |
800 | for (;;) { | |
801 | const char *space = strchrnul(attrs, ' '); | |
802 | if (len == space - attrs && !strncmp(attrs, attr, len)) | |
803 | return 1; | |
804 | if (!*space) | |
805 | return 0; | |
806 | attrs = space + 1; | |
807 | } | |
808 | } | |
809 | ||
6eb996b5 DB |
810 | static struct ref *get_refs_list(struct transport *transport, int for_push) |
811 | { | |
292ce46b | 812 | struct helper_data *data = transport->data; |
6eb996b5 DB |
813 | struct child_process *helper; |
814 | struct ref *ret = NULL; | |
815 | struct ref **tail = &ret; | |
816 | struct ref *posn; | |
817 | struct strbuf buf = STRBUF_INIT; | |
6eb996b5 DB |
818 | |
819 | helper = get_helper(transport); | |
2d14d65c | 820 | |
fa8c097c IL |
821 | if (process_connect(transport, for_push)) { |
822 | do_take_over(transport); | |
823 | return transport->get_refs_list(transport, for_push); | |
824 | } | |
825 | ||
ae4efe19 SP |
826 | if (data->push && for_push) |
827 | write_str_in_full(helper->in, "list for-push\n"); | |
828 | else | |
829 | write_str_in_full(helper->in, "list\n"); | |
6eb996b5 | 830 | |
6eb996b5 DB |
831 | while (1) { |
832 | char *eov, *eon; | |
bf3c523c | 833 | recvline(data, &buf); |
6eb996b5 DB |
834 | |
835 | if (!*buf.buf) | |
836 | break; | |
837 | ||
838 | eov = strchr(buf.buf, ' '); | |
839 | if (!eov) | |
840 | die("Malformed response in ref list: %s", buf.buf); | |
841 | eon = strchr(eov + 1, ' '); | |
842 | *eov = '\0'; | |
843 | if (eon) | |
844 | *eon = '\0'; | |
845 | *tail = alloc_ref(eov + 1); | |
846 | if (buf.buf[0] == '@') | |
847 | (*tail)->symref = xstrdup(buf.buf + 1); | |
848 | else if (buf.buf[0] != '?') | |
849 | get_sha1_hex(buf.buf, (*tail)->old_sha1); | |
f8ec9167 DB |
850 | if (eon) { |
851 | if (has_attribute(eon + 1, "unchanged")) { | |
852 | (*tail)->status |= REF_STATUS_UPTODATE; | |
853 | read_ref((*tail)->name, (*tail)->old_sha1); | |
854 | } | |
855 | } | |
6eb996b5 DB |
856 | tail = &((*tail)->next); |
857 | } | |
bf3c523c IL |
858 | if (debug) |
859 | fprintf(stderr, "Debug: Read ref listing.\n"); | |
6eb996b5 DB |
860 | strbuf_release(&buf); |
861 | ||
862 | for (posn = ret; posn; posn = posn->next) | |
863 | resolve_remote_symref(posn, ret); | |
864 | ||
865 | return ret; | |
866 | } | |
867 | ||
c9e388bb | 868 | int transport_helper_init(struct transport *transport, const char *name) |
6eb996b5 DB |
869 | { |
870 | struct helper_data *data = xcalloc(sizeof(*data), 1); | |
c9e388bb | 871 | data->name = name; |
6eb996b5 | 872 | |
bf3c523c IL |
873 | if (getenv("GIT_TRANSPORT_HELPER_DEBUG")) |
874 | debug = 1; | |
875 | ||
6eb996b5 | 876 | transport->data = data; |
ef08ef9e | 877 | transport->set_option = set_helper_option; |
6eb996b5 DB |
878 | transport->get_refs_list = get_refs_list; |
879 | transport->fetch = fetch; | |
ae4efe19 | 880 | transport->push_refs = push_refs; |
f2a37151 | 881 | transport->disconnect = release_helper; |
b236752a | 882 | transport->connect = connect_helper; |
61b075bd | 883 | transport->smart_options = &(data->transport_options); |
6eb996b5 DB |
884 | return 0; |
885 | } | |
419f37db IL |
886 | |
887 | /* | |
888 | * Linux pipes can buffer 65536 bytes at once (and most platforms can | |
889 | * buffer less), so attempt reads and writes with up to that size. | |
890 | */ | |
891 | #define BUFFERSIZE 65536 | |
892 | /* This should be enough to hold debugging message. */ | |
893 | #define PBUFFERSIZE 8192 | |
894 | ||
895 | /* Print bidirectional transfer loop debug message. */ | |
896 | static void transfer_debug(const char *fmt, ...) | |
897 | { | |
898 | va_list args; | |
899 | char msgbuf[PBUFFERSIZE]; | |
900 | static int debug_enabled = -1; | |
901 | ||
902 | if (debug_enabled < 0) | |
903 | debug_enabled = getenv("GIT_TRANSLOOP_DEBUG") ? 1 : 0; | |
904 | if (!debug_enabled) | |
905 | return; | |
906 | ||
907 | va_start(args, fmt); | |
908 | vsnprintf(msgbuf, PBUFFERSIZE, fmt, args); | |
909 | va_end(args); | |
910 | fprintf(stderr, "Transfer loop debugging: %s\n", msgbuf); | |
911 | } | |
912 | ||
913 | /* Stream state: More data may be coming in this direction. */ | |
914 | #define SSTATE_TRANSFERING 0 | |
915 | /* | |
916 | * Stream state: No more data coming in this direction, flushing rest of | |
917 | * data. | |
918 | */ | |
919 | #define SSTATE_FLUSHING 1 | |
920 | /* Stream state: Transfer in this direction finished. */ | |
921 | #define SSTATE_FINISHED 2 | |
922 | ||
923 | #define STATE_NEEDS_READING(state) ((state) <= SSTATE_TRANSFERING) | |
924 | #define STATE_NEEDS_WRITING(state) ((state) <= SSTATE_FLUSHING) | |
925 | #define STATE_NEEDS_CLOSING(state) ((state) == SSTATE_FLUSHING) | |
926 | ||
927 | /* Unidirectional transfer. */ | |
928 | struct unidirectional_transfer { | |
929 | /* Source */ | |
930 | int src; | |
931 | /* Destination */ | |
932 | int dest; | |
933 | /* Is source socket? */ | |
934 | int src_is_sock; | |
935 | /* Is destination socket? */ | |
936 | int dest_is_sock; | |
937 | /* Transfer state (TRANSFERING/FLUSHING/FINISHED) */ | |
938 | int state; | |
939 | /* Buffer. */ | |
940 | char buf[BUFFERSIZE]; | |
941 | /* Buffer used. */ | |
942 | size_t bufuse; | |
943 | /* Name of source. */ | |
944 | const char *src_name; | |
945 | /* Name of destination. */ | |
946 | const char *dest_name; | |
947 | }; | |
948 | ||
949 | /* Closes the target (for writing) if transfer has finished. */ | |
950 | static void udt_close_if_finished(struct unidirectional_transfer *t) | |
951 | { | |
952 | if (STATE_NEEDS_CLOSING(t->state) && !t->bufuse) { | |
953 | t->state = SSTATE_FINISHED; | |
954 | if (t->dest_is_sock) | |
955 | shutdown(t->dest, SHUT_WR); | |
956 | else | |
957 | close(t->dest); | |
958 | transfer_debug("Closed %s.", t->dest_name); | |
959 | } | |
960 | } | |
961 | ||
962 | /* | |
963 | * Tries to read read data from source into buffer. If buffer is full, | |
964 | * no data is read. Returns 0 on success, -1 on error. | |
965 | */ | |
966 | static int udt_do_read(struct unidirectional_transfer *t) | |
967 | { | |
968 | ssize_t bytes; | |
969 | ||
970 | if (t->bufuse == BUFFERSIZE) | |
971 | return 0; /* No space for more. */ | |
972 | ||
973 | transfer_debug("%s is readable", t->src_name); | |
974 | bytes = read(t->src, t->buf + t->bufuse, BUFFERSIZE - t->bufuse); | |
975 | if (bytes < 0 && errno != EWOULDBLOCK && errno != EAGAIN && | |
976 | errno != EINTR) { | |
977 | error("read(%s) failed: %s", t->src_name, strerror(errno)); | |
978 | return -1; | |
979 | } else if (bytes == 0) { | |
980 | transfer_debug("%s EOF (with %i bytes in buffer)", | |
981 | t->src_name, t->bufuse); | |
982 | t->state = SSTATE_FLUSHING; | |
983 | } else if (bytes > 0) { | |
984 | t->bufuse += bytes; | |
985 | transfer_debug("Read %i bytes from %s (buffer now at %i)", | |
986 | (int)bytes, t->src_name, (int)t->bufuse); | |
987 | } | |
988 | return 0; | |
989 | } | |
990 | ||
991 | /* Tries to write data from buffer into destination. If buffer is empty, | |
992 | * no data is written. Returns 0 on success, -1 on error. | |
993 | */ | |
994 | static int udt_do_write(struct unidirectional_transfer *t) | |
995 | { | |
803dbdb9 | 996 | ssize_t bytes; |
419f37db IL |
997 | |
998 | if (t->bufuse == 0) | |
999 | return 0; /* Nothing to write. */ | |
1000 | ||
1001 | transfer_debug("%s is writable", t->dest_name); | |
1002 | bytes = write(t->dest, t->buf, t->bufuse); | |
1003 | if (bytes < 0 && errno != EWOULDBLOCK && errno != EAGAIN && | |
1004 | errno != EINTR) { | |
1005 | error("write(%s) failed: %s", t->dest_name, strerror(errno)); | |
1006 | return -1; | |
1007 | } else if (bytes > 0) { | |
1008 | t->bufuse -= bytes; | |
1009 | if (t->bufuse) | |
1010 | memmove(t->buf, t->buf + bytes, t->bufuse); | |
1011 | transfer_debug("Wrote %i bytes to %s (buffer now at %i)", | |
1012 | (int)bytes, t->dest_name, (int)t->bufuse); | |
1013 | } | |
1014 | return 0; | |
1015 | } | |
1016 | ||
1017 | ||
1018 | /* State of bidirectional transfer loop. */ | |
1019 | struct bidirectional_transfer_state { | |
1020 | /* Direction from program to git. */ | |
1021 | struct unidirectional_transfer ptg; | |
1022 | /* Direction from git to program. */ | |
1023 | struct unidirectional_transfer gtp; | |
1024 | }; | |
1025 | ||
1026 | static void *udt_copy_task_routine(void *udt) | |
1027 | { | |
1028 | struct unidirectional_transfer *t = (struct unidirectional_transfer *)udt; | |
1029 | while (t->state != SSTATE_FINISHED) { | |
1030 | if (STATE_NEEDS_READING(t->state)) | |
1031 | if (udt_do_read(t)) | |
1032 | return NULL; | |
1033 | if (STATE_NEEDS_WRITING(t->state)) | |
1034 | if (udt_do_write(t)) | |
1035 | return NULL; | |
1036 | if (STATE_NEEDS_CLOSING(t->state)) | |
1037 | udt_close_if_finished(t); | |
1038 | } | |
1039 | return udt; /* Just some non-NULL value. */ | |
1040 | } | |
1041 | ||
1042 | #ifndef NO_PTHREADS | |
1043 | ||
1044 | /* | |
1045 | * Join thread, with apporiate errors on failure. Name is name for the | |
1046 | * thread (for error messages). Returns 0 on success, 1 on failure. | |
1047 | */ | |
1048 | static int tloop_join(pthread_t thread, const char *name) | |
1049 | { | |
1050 | int err; | |
1051 | void *tret; | |
1052 | err = pthread_join(thread, &tret); | |
1053 | if (!tret) { | |
1054 | error("%s thread failed", name); | |
1055 | return 1; | |
1056 | } | |
1057 | if (err) { | |
1058 | error("%s thread failed to join: %s", name, strerror(err)); | |
1059 | return 1; | |
1060 | } | |
1061 | return 0; | |
1062 | } | |
1063 | ||
1064 | /* | |
1065 | * Spawn the transfer tasks and then wait for them. Returns 0 on success, | |
1066 | * -1 on failure. | |
1067 | */ | |
1068 | static int tloop_spawnwait_tasks(struct bidirectional_transfer_state *s) | |
1069 | { | |
1070 | pthread_t gtp_thread; | |
1071 | pthread_t ptg_thread; | |
1072 | int err; | |
1073 | int ret = 0; | |
1074 | err = pthread_create(>p_thread, NULL, udt_copy_task_routine, | |
1075 | &s->gtp); | |
1076 | if (err) | |
1077 | die("Can't start thread for copying data: %s", strerror(err)); | |
1078 | err = pthread_create(&ptg_thread, NULL, udt_copy_task_routine, | |
1079 | &s->ptg); | |
1080 | if (err) | |
1081 | die("Can't start thread for copying data: %s", strerror(err)); | |
1082 | ||
1083 | ret |= tloop_join(gtp_thread, "Git to program copy"); | |
1084 | ret |= tloop_join(ptg_thread, "Program to git copy"); | |
1085 | return ret; | |
1086 | } | |
1087 | #else | |
1088 | ||
1089 | /* Close the source and target (for writing) for transfer. */ | |
1090 | static void udt_kill_transfer(struct unidirectional_transfer *t) | |
1091 | { | |
1092 | t->state = SSTATE_FINISHED; | |
1093 | /* | |
1094 | * Socket read end left open isn't a disaster if nobody | |
1095 | * attempts to read from it (mingw compat headers do not | |
1096 | * have SHUT_RD)... | |
1097 | * | |
1098 | * We can't fully close the socket since otherwise gtp | |
1099 | * task would first close the socket it sends data to | |
1100 | * while closing the ptg file descriptors. | |
1101 | */ | |
1102 | if (!t->src_is_sock) | |
1103 | close(t->src); | |
1104 | if (t->dest_is_sock) | |
1105 | shutdown(t->dest, SHUT_WR); | |
1106 | else | |
1107 | close(t->dest); | |
1108 | } | |
1109 | ||
1110 | /* | |
1111 | * Join process, with apporiate errors on failure. Name is name for the | |
1112 | * process (for error messages). Returns 0 on success, 1 on failure. | |
1113 | */ | |
1114 | static int tloop_join(pid_t pid, const char *name) | |
1115 | { | |
1116 | int tret; | |
1117 | if (waitpid(pid, &tret, 0) < 0) { | |
1118 | error("%s process failed to wait: %s", name, strerror(errno)); | |
1119 | return 1; | |
1120 | } | |
1121 | if (!WIFEXITED(tret) || WEXITSTATUS(tret)) { | |
1122 | error("%s process failed", name); | |
1123 | return 1; | |
1124 | } | |
1125 | return 0; | |
1126 | } | |
1127 | ||
1128 | /* | |
1129 | * Spawn the transfer tasks and then wait for them. Returns 0 on success, | |
1130 | * -1 on failure. | |
1131 | */ | |
1132 | static int tloop_spawnwait_tasks(struct bidirectional_transfer_state *s) | |
1133 | { | |
1134 | pid_t pid1, pid2; | |
1135 | int ret = 0; | |
1136 | ||
1137 | /* Fork thread #1: git to program. */ | |
1138 | pid1 = fork(); | |
1139 | if (pid1 < 0) | |
1140 | die_errno("Can't start thread for copying data"); | |
1141 | else if (pid1 == 0) { | |
1142 | udt_kill_transfer(&s->ptg); | |
1143 | exit(udt_copy_task_routine(&s->gtp) ? 0 : 1); | |
1144 | } | |
1145 | ||
1146 | /* Fork thread #2: program to git. */ | |
1147 | pid2 = fork(); | |
1148 | if (pid2 < 0) | |
1149 | die_errno("Can't start thread for copying data"); | |
1150 | else if (pid2 == 0) { | |
1151 | udt_kill_transfer(&s->gtp); | |
1152 | exit(udt_copy_task_routine(&s->ptg) ? 0 : 1); | |
1153 | } | |
1154 | ||
1155 | /* | |
1156 | * Close both streams in parent as to not interfere with | |
1157 | * end of file detection and wait for both tasks to finish. | |
1158 | */ | |
1159 | udt_kill_transfer(&s->gtp); | |
1160 | udt_kill_transfer(&s->ptg); | |
1161 | ret |= tloop_join(pid1, "Git to program copy"); | |
1162 | ret |= tloop_join(pid2, "Program to git copy"); | |
1163 | return ret; | |
1164 | } | |
1165 | #endif | |
1166 | ||
1167 | /* | |
1168 | * Copies data from stdin to output and from input to stdout simultaneously. | |
1169 | * Additionally filtering through given filter. If filter is NULL, uses | |
1170 | * identity filter. | |
1171 | */ | |
1172 | int bidirectional_transfer_loop(int input, int output) | |
1173 | { | |
1174 | struct bidirectional_transfer_state state; | |
1175 | ||
1176 | /* Fill the state fields. */ | |
1177 | state.ptg.src = input; | |
1178 | state.ptg.dest = 1; | |
1179 | state.ptg.src_is_sock = (input == output); | |
1180 | state.ptg.dest_is_sock = 0; | |
1181 | state.ptg.state = SSTATE_TRANSFERING; | |
1182 | state.ptg.bufuse = 0; | |
1183 | state.ptg.src_name = "remote input"; | |
1184 | state.ptg.dest_name = "stdout"; | |
1185 | ||
1186 | state.gtp.src = 0; | |
1187 | state.gtp.dest = output; | |
1188 | state.gtp.src_is_sock = 0; | |
1189 | state.gtp.dest_is_sock = (input == output); | |
1190 | state.gtp.state = SSTATE_TRANSFERING; | |
1191 | state.gtp.bufuse = 0; | |
1192 | state.gtp.src_name = "stdin"; | |
1193 | state.gtp.dest_name = "remote output"; | |
1194 | ||
1195 | return tloop_spawnwait_tasks(&state); | |
1196 | } |