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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" |
c34fe630 | 12 | #include "sigchain.h" |
7851b1e6 | 13 | |
bf3c523c IL |
14 | static int debug; |
15 | ||
9cba13ca | 16 | struct helper_data { |
6eb996b5 DB |
17 | const char *name; |
18 | struct child_process *helper; | |
292ce46b | 19 | FILE *out; |
ef08ef9e | 20 | unsigned fetch : 1, |
a24a32dd | 21 | import : 1, |
73b49a75 | 22 | export : 1, |
ae4efe19 | 23 | option : 1, |
fa8c097c IL |
24 | push : 1, |
25 | connect : 1, | |
26 | no_disconnect_req : 1; | |
a515ebe9 SR |
27 | char *export_marks; |
28 | char *import_marks; | |
72ff8943 DB |
29 | /* These go from remote name (as in "list") to private name */ |
30 | struct refspec *refspecs; | |
31 | int refspec_nr; | |
61b075bd IL |
32 | /* Transport options for fetch-pack/send-pack (should one of |
33 | * those be invoked). | |
34 | */ | |
35 | struct git_transport_options transport_options; | |
6eb996b5 DB |
36 | }; |
37 | ||
bf3c523c IL |
38 | static void sendline(struct helper_data *helper, struct strbuf *buffer) |
39 | { | |
40 | if (debug) | |
41 | fprintf(stderr, "Debug: Remote helper: -> %s", buffer->buf); | |
42 | if (write_in_full(helper->helper->in, buffer->buf, buffer->len) | |
43 | != buffer->len) | |
44 | die_errno("Full write to remote helper failed"); | |
45 | } | |
46 | ||
fa8c097c | 47 | static int recvline_fh(FILE *helper, struct strbuf *buffer) |
bf3c523c IL |
48 | { |
49 | strbuf_reset(buffer); | |
50 | if (debug) | |
51 | fprintf(stderr, "Debug: Remote helper: Waiting...\n"); | |
fa8c097c | 52 | if (strbuf_getline(buffer, helper, '\n') == EOF) { |
bf3c523c IL |
53 | if (debug) |
54 | fprintf(stderr, "Debug: Remote helper quit.\n"); | |
55 | exit(128); | |
56 | } | |
57 | ||
58 | if (debug) | |
59 | fprintf(stderr, "Debug: Remote helper: <- %s\n", buffer->buf); | |
60 | return 0; | |
61 | } | |
62 | ||
fa8c097c IL |
63 | static int recvline(struct helper_data *helper, struct strbuf *buffer) |
64 | { | |
65 | return recvline_fh(helper->out, buffer); | |
66 | } | |
67 | ||
bf3c523c IL |
68 | static void xchgline(struct helper_data *helper, struct strbuf *buffer) |
69 | { | |
70 | sendline(helper, buffer); | |
71 | recvline(helper, buffer); | |
72 | } | |
73 | ||
74 | static void write_constant(int fd, const char *str) | |
75 | { | |
76 | if (debug) | |
77 | fprintf(stderr, "Debug: Remote helper: -> %s", str); | |
78 | if (write_in_full(fd, str, strlen(str)) != strlen(str)) | |
79 | die_errno("Full write to remote helper failed"); | |
80 | } | |
81 | ||
c2e86add | 82 | static const char *remove_ext_force(const char *url) |
25d5cc48 IL |
83 | { |
84 | if (url) { | |
85 | const char *colon = strchr(url, ':'); | |
86 | if (colon && colon[1] == ':') | |
87 | return colon + 2; | |
88 | } | |
89 | return url; | |
90 | } | |
91 | ||
fa8c097c IL |
92 | static void do_take_over(struct transport *transport) |
93 | { | |
94 | struct helper_data *data; | |
95 | data = (struct helper_data *)transport->data; | |
96 | transport_take_over(transport, data->helper); | |
97 | fclose(data->out); | |
98 | free(data); | |
99 | } | |
100 | ||
6eb996b5 DB |
101 | static struct child_process *get_helper(struct transport *transport) |
102 | { | |
103 | struct helper_data *data = transport->data; | |
104 | struct strbuf buf = STRBUF_INIT; | |
105 | struct child_process *helper; | |
72ff8943 DB |
106 | const char **refspecs = NULL; |
107 | int refspec_nr = 0; | |
108 | int refspec_alloc = 0; | |
61b075bd | 109 | int duped; |
6b02de3b | 110 | int code; |
e1735872 DI |
111 | char git_dir_buf[sizeof(GIT_DIR_ENVIRONMENT) + PATH_MAX + 1]; |
112 | const char *helper_env[] = { | |
113 | git_dir_buf, | |
114 | NULL | |
115 | }; | |
116 | ||
6eb996b5 DB |
117 | |
118 | if (data->helper) | |
119 | return data->helper; | |
120 | ||
121 | helper = xcalloc(1, sizeof(*helper)); | |
122 | helper->in = -1; | |
123 | helper->out = -1; | |
124 | helper->err = 0; | |
125 | helper->argv = xcalloc(4, sizeof(*helper->argv)); | |
6b02de3b | 126 | strbuf_addf(&buf, "git-remote-%s", data->name); |
6eb996b5 DB |
127 | helper->argv[0] = strbuf_detach(&buf, NULL); |
128 | helper->argv[1] = transport->remote->name; | |
25d5cc48 | 129 | helper->argv[2] = remove_ext_force(transport->url); |
6b02de3b IL |
130 | helper->git_cmd = 0; |
131 | helper->silent_exec_failure = 1; | |
e1735872 DI |
132 | |
133 | snprintf(git_dir_buf, sizeof(git_dir_buf), "%s=%s", GIT_DIR_ENVIRONMENT, get_git_dir()); | |
134 | helper->env = helper_env; | |
135 | ||
6b02de3b IL |
136 | code = start_command(helper); |
137 | if (code < 0 && errno == ENOENT) | |
138 | die("Unable to find remote helper for '%s'", data->name); | |
139 | else if (code != 0) | |
140 | exit(code); | |
141 | ||
6eb996b5 | 142 | data->helper = helper; |
fa8c097c | 143 | data->no_disconnect_req = 0; |
6eb996b5 | 144 | |
61b075bd IL |
145 | /* |
146 | * Open the output as FILE* so strbuf_getline() can be used. | |
147 | * Do this with duped fd because fclose() will close the fd, | |
148 | * and stuff like taking over will require the fd to remain. | |
61b075bd IL |
149 | */ |
150 | duped = dup(helper->out); | |
151 | if (duped < 0) | |
152 | die_errno("Can't dup helper output fd"); | |
153 | data->out = xfdopen(duped, "r"); | |
154 | ||
bf3c523c | 155 | write_constant(helper->in, "capabilities\n"); |
2d14d65c | 156 | |
6eb996b5 | 157 | while (1) { |
28ed5b35 IL |
158 | const char *capname; |
159 | int mandatory = 0; | |
bf3c523c | 160 | recvline(data, &buf); |
6eb996b5 DB |
161 | |
162 | if (!*buf.buf) | |
163 | break; | |
28ed5b35 IL |
164 | |
165 | if (*buf.buf == '*') { | |
166 | capname = buf.buf + 1; | |
167 | mandatory = 1; | |
168 | } else | |
169 | capname = buf.buf; | |
170 | ||
bf3c523c | 171 | if (debug) |
28ed5b35 IL |
172 | fprintf(stderr, "Debug: Got cap %s\n", capname); |
173 | if (!strcmp(capname, "fetch")) | |
6eb996b5 | 174 | data->fetch = 1; |
28ed5b35 | 175 | else if (!strcmp(capname, "option")) |
ef08ef9e | 176 | data->option = 1; |
28ed5b35 | 177 | else if (!strcmp(capname, "push")) |
ae4efe19 | 178 | data->push = 1; |
28ed5b35 | 179 | else if (!strcmp(capname, "import")) |
e65e91ed | 180 | data->import = 1; |
73b49a75 SR |
181 | else if (!strcmp(capname, "export")) |
182 | data->export = 1; | |
28ed5b35 | 183 | else if (!data->refspecs && !prefixcmp(capname, "refspec ")) { |
72ff8943 DB |
184 | ALLOC_GROW(refspecs, |
185 | refspec_nr + 1, | |
186 | refspec_alloc); | |
c28cce55 | 187 | refspecs[refspec_nr++] = xstrdup(capname + strlen("refspec ")); |
fa8c097c IL |
188 | } else if (!strcmp(capname, "connect")) { |
189 | data->connect = 1; | |
a515ebe9 SR |
190 | } else if (!prefixcmp(capname, "export-marks ")) { |
191 | struct strbuf arg = STRBUF_INIT; | |
192 | strbuf_addstr(&arg, "--export-marks="); | |
193 | strbuf_addstr(&arg, capname + strlen("export-marks ")); | |
194 | data->export_marks = strbuf_detach(&arg, NULL); | |
195 | } else if (!prefixcmp(capname, "import-marks")) { | |
196 | struct strbuf arg = STRBUF_INIT; | |
197 | strbuf_addstr(&arg, "--import-marks="); | |
198 | strbuf_addstr(&arg, capname + strlen("import-marks ")); | |
199 | data->import_marks = strbuf_detach(&arg, NULL); | |
28ed5b35 | 200 | } else if (mandatory) { |
9517e6b8 | 201 | die("Unknown mandatory capability %s. This remote " |
82247e9b | 202 | "helper probably needs newer version of Git.", |
28ed5b35 | 203 | capname); |
72ff8943 DB |
204 | } |
205 | } | |
206 | if (refspecs) { | |
207 | int i; | |
208 | data->refspec_nr = refspec_nr; | |
209 | data->refspecs = parse_fetch_refspec(refspec_nr, refspecs); | |
210 | for (i = 0; i < refspec_nr; i++) { | |
211 | free((char *)refspecs[i]); | |
212 | } | |
213 | free(refspecs); | |
6eb996b5 | 214 | } |
b962dbdc | 215 | strbuf_release(&buf); |
bf3c523c IL |
216 | if (debug) |
217 | fprintf(stderr, "Debug: Capabilities complete.\n"); | |
6eb996b5 DB |
218 | return data->helper; |
219 | } | |
220 | ||
221 | static int disconnect_helper(struct transport *transport) | |
222 | { | |
223 | struct helper_data *data = transport->data; | |
cc567322 | 224 | int res = 0; |
bf3c523c | 225 | |
6eb996b5 | 226 | if (data->helper) { |
bf3c523c IL |
227 | if (debug) |
228 | fprintf(stderr, "Debug: Disconnecting.\n"); | |
fa8c097c | 229 | if (!data->no_disconnect_req) { |
c34fe630 JK |
230 | /* |
231 | * Ignore write errors; there's nothing we can do, | |
232 | * since we're about to close the pipe anyway. And the | |
233 | * most likely error is EPIPE due to the helper dying | |
234 | * to report an error itself. | |
235 | */ | |
236 | sigchain_push(SIGPIPE, SIG_IGN); | |
237 | xwrite(data->helper->in, "\n", 1); | |
238 | sigchain_pop(SIGPIPE); | |
fa8c097c | 239 | } |
6eb996b5 | 240 | close(data->helper->in); |
61b075bd | 241 | close(data->helper->out); |
292ce46b | 242 | fclose(data->out); |
cc567322 | 243 | res = finish_command(data->helper); |
6eb996b5 DB |
244 | free((char *)data->helper->argv[0]); |
245 | free(data->helper->argv); | |
246 | free(data->helper); | |
247 | data->helper = NULL; | |
248 | } | |
cc567322 | 249 | return res; |
6eb996b5 DB |
250 | } |
251 | ||
ef08ef9e SP |
252 | static const char *unsupported_options[] = { |
253 | TRANS_OPT_UPLOADPACK, | |
254 | TRANS_OPT_RECEIVEPACK, | |
255 | TRANS_OPT_THIN, | |
256 | TRANS_OPT_KEEP | |
257 | }; | |
258 | static const char *boolean_options[] = { | |
259 | TRANS_OPT_THIN, | |
260 | TRANS_OPT_KEEP, | |
261 | TRANS_OPT_FOLLOWTAGS | |
262 | }; | |
263 | ||
264 | static int set_helper_option(struct transport *transport, | |
265 | const char *name, const char *value) | |
266 | { | |
267 | struct helper_data *data = transport->data; | |
ef08ef9e SP |
268 | struct strbuf buf = STRBUF_INIT; |
269 | int i, ret, is_bool = 0; | |
270 | ||
bf3c523c IL |
271 | get_helper(transport); |
272 | ||
ef08ef9e SP |
273 | if (!data->option) |
274 | return 1; | |
275 | ||
276 | for (i = 0; i < ARRAY_SIZE(unsupported_options); i++) { | |
277 | if (!strcmp(name, unsupported_options[i])) | |
278 | return 1; | |
279 | } | |
280 | ||
281 | for (i = 0; i < ARRAY_SIZE(boolean_options); i++) { | |
282 | if (!strcmp(name, boolean_options[i])) { | |
283 | is_bool = 1; | |
284 | break; | |
285 | } | |
286 | } | |
287 | ||
288 | strbuf_addf(&buf, "option %s ", name); | |
289 | if (is_bool) | |
290 | strbuf_addstr(&buf, value ? "true" : "false"); | |
291 | else | |
292 | quote_c_style(value, &buf, NULL, 0); | |
293 | strbuf_addch(&buf, '\n'); | |
294 | ||
bf3c523c | 295 | xchgline(data, &buf); |
ef08ef9e SP |
296 | |
297 | if (!strcmp(buf.buf, "ok")) | |
298 | ret = 0; | |
299 | else if (!prefixcmp(buf.buf, "error")) { | |
300 | ret = -1; | |
301 | } else if (!strcmp(buf.buf, "unsupported")) | |
302 | ret = 1; | |
303 | else { | |
304 | warning("%s unexpectedly said: '%s'", data->name, buf.buf); | |
305 | ret = 1; | |
306 | } | |
307 | strbuf_release(&buf); | |
308 | return ret; | |
309 | } | |
310 | ||
311 | static void standard_options(struct transport *t) | |
312 | { | |
313 | char buf[16]; | |
314 | int n; | |
315 | int v = t->verbose; | |
ef08ef9e | 316 | |
d01b3c02 | 317 | set_helper_option(t, "progress", t->progress ? "true" : "false"); |
ef08ef9e SP |
318 | |
319 | n = snprintf(buf, sizeof(buf), "%d", v + 1); | |
320 | if (n >= sizeof(buf)) | |
321 | die("impossibly large verbosity value"); | |
322 | set_helper_option(t, "verbosity", buf); | |
323 | } | |
324 | ||
f2a37151 DB |
325 | static int release_helper(struct transport *transport) |
326 | { | |
cc567322 | 327 | int res = 0; |
72ff8943 DB |
328 | struct helper_data *data = transport->data; |
329 | free_refspec(data->refspec_nr, data->refspecs); | |
330 | data->refspecs = NULL; | |
cc567322 | 331 | res = disconnect_helper(transport); |
f2a37151 | 332 | free(transport->data); |
cc567322 | 333 | return res; |
f2a37151 DB |
334 | } |
335 | ||
6eb996b5 | 336 | static int fetch_with_fetch(struct transport *transport, |
37148311 | 337 | int nr_heads, struct ref **to_fetch) |
6eb996b5 | 338 | { |
292ce46b | 339 | struct helper_data *data = transport->data; |
6eb996b5 DB |
340 | int i; |
341 | struct strbuf buf = STRBUF_INIT; | |
342 | ||
ef08ef9e SP |
343 | standard_options(transport); |
344 | ||
6eb996b5 | 345 | for (i = 0; i < nr_heads; i++) { |
1088261f | 346 | const struct ref *posn = to_fetch[i]; |
6eb996b5 DB |
347 | if (posn->status & REF_STATUS_UPTODATE) |
348 | continue; | |
2d14d65c DB |
349 | |
350 | strbuf_addf(&buf, "fetch %s %s\n", | |
351 | sha1_to_hex(posn->old_sha1), posn->name); | |
292ce46b | 352 | } |
2d14d65c | 353 | |
292ce46b | 354 | strbuf_addch(&buf, '\n'); |
bf3c523c | 355 | sendline(data, &buf); |
292ce46b SP |
356 | |
357 | while (1) { | |
bf3c523c | 358 | recvline(data, &buf); |
292ce46b SP |
359 | |
360 | if (!prefixcmp(buf.buf, "lock ")) { | |
361 | const char *name = buf.buf + 5; | |
362 | if (transport->pack_lockfile) | |
363 | warning("%s also locked %s", data->name, name); | |
364 | else | |
365 | transport->pack_lockfile = xstrdup(name); | |
366 | } | |
367 | else if (!buf.len) | |
368 | break; | |
369 | else | |
370 | warning("%s unexpectedly said: '%s'", data->name, buf.buf); | |
6eb996b5 | 371 | } |
292ce46b | 372 | strbuf_release(&buf); |
6eb996b5 DB |
373 | return 0; |
374 | } | |
375 | ||
e65e91ed DB |
376 | static int get_importer(struct transport *transport, struct child_process *fastimport) |
377 | { | |
378 | struct child_process *helper = get_helper(transport); | |
379 | memset(fastimport, 0, sizeof(*fastimport)); | |
380 | fastimport->in = helper->out; | |
381 | fastimport->argv = xcalloc(5, sizeof(*fastimport->argv)); | |
382 | fastimport->argv[0] = "fast-import"; | |
383 | fastimport->argv[1] = "--quiet"; | |
384 | ||
385 | fastimport->git_cmd = 1; | |
386 | return start_command(fastimport); | |
387 | } | |
388 | ||
73b49a75 SR |
389 | static int get_exporter(struct transport *transport, |
390 | struct child_process *fastexport, | |
73b49a75 SR |
391 | struct string_list *revlist_args) |
392 | { | |
a515ebe9 | 393 | struct helper_data *data = transport->data; |
73b49a75 SR |
394 | struct child_process *helper = get_helper(transport); |
395 | int argc = 0, i; | |
396 | memset(fastexport, 0, sizeof(*fastexport)); | |
397 | ||
398 | /* we need to duplicate helper->in because we want to use it after | |
399 | * fastexport is done with it. */ | |
400 | fastexport->out = dup(helper->in); | |
1f25c504 | 401 | fastexport->argv = xcalloc(5 + revlist_args->nr, sizeof(*fastexport->argv)); |
73b49a75 | 402 | fastexport->argv[argc++] = "fast-export"; |
1f25c504 | 403 | fastexport->argv[argc++] = "--use-done-feature"; |
a515ebe9 SR |
404 | if (data->export_marks) |
405 | fastexport->argv[argc++] = data->export_marks; | |
406 | if (data->import_marks) | |
407 | fastexport->argv[argc++] = data->import_marks; | |
73b49a75 SR |
408 | |
409 | for (i = 0; i < revlist_args->nr; i++) | |
410 | fastexport->argv[argc++] = revlist_args->items[i].string; | |
411 | ||
412 | fastexport->git_cmd = 1; | |
413 | return start_command(fastexport); | |
414 | } | |
415 | ||
e65e91ed DB |
416 | static int fetch_with_import(struct transport *transport, |
417 | int nr_heads, struct ref **to_fetch) | |
418 | { | |
419 | struct child_process fastimport; | |
72ff8943 | 420 | struct helper_data *data = transport->data; |
e65e91ed DB |
421 | int i; |
422 | struct ref *posn; | |
423 | struct strbuf buf = STRBUF_INIT; | |
424 | ||
bf3c523c IL |
425 | get_helper(transport); |
426 | ||
e65e91ed DB |
427 | if (get_importer(transport, &fastimport)) |
428 | die("Couldn't run fast-import"); | |
429 | ||
430 | for (i = 0; i < nr_heads; i++) { | |
431 | posn = to_fetch[i]; | |
432 | if (posn->status & REF_STATUS_UPTODATE) | |
433 | continue; | |
434 | ||
435 | strbuf_addf(&buf, "import %s\n", posn->name); | |
bf3c523c | 436 | sendline(data, &buf); |
e65e91ed DB |
437 | strbuf_reset(&buf); |
438 | } | |
9504bc9d SR |
439 | |
440 | write_constant(data->helper->in, "\n"); | |
441 | ||
cc567322 SR |
442 | if (finish_command(&fastimport)) |
443 | die("Error while running fast-import"); | |
b962dbdc SR |
444 | free(fastimport.argv); |
445 | fastimport.argv = NULL; | |
e65e91ed | 446 | |
dff9d65d FA |
447 | /* |
448 | * The fast-import stream of a remote helper that advertises | |
449 | * the "refspec" capability writes to the refs named after the | |
450 | * right hand side of the first refspec matching each ref we | |
451 | * were fetching. | |
452 | * | |
453 | * (If no "refspec" capability was specified, for historical | |
454 | * reasons we default to *:*.) | |
455 | * | |
456 | * Store the result in to_fetch[i].old_sha1. Callers such | |
457 | * as "git fetch" can use the value to write feedback to the | |
458 | * terminal, populate FETCH_HEAD, and determine what new value | |
459 | * should be written to peer_ref if the update is a | |
460 | * fast-forward or this is a forced update. | |
461 | */ | |
e65e91ed | 462 | for (i = 0; i < nr_heads; i++) { |
72ff8943 | 463 | char *private; |
e65e91ed DB |
464 | posn = to_fetch[i]; |
465 | if (posn->status & REF_STATUS_UPTODATE) | |
466 | continue; | |
72ff8943 DB |
467 | if (data->refspecs) |
468 | private = apply_refspecs(data->refspecs, data->refspec_nr, posn->name); | |
469 | else | |
c28cce55 | 470 | private = xstrdup(posn->name); |
d51b720f MH |
471 | if (private) { |
472 | read_ref(private, posn->old_sha1); | |
473 | free(private); | |
474 | } | |
e65e91ed | 475 | } |
b962dbdc | 476 | strbuf_release(&buf); |
e65e91ed DB |
477 | return 0; |
478 | } | |
479 | ||
fa8c097c IL |
480 | static int process_connect_service(struct transport *transport, |
481 | const char *name, const char *exec) | |
482 | { | |
483 | struct helper_data *data = transport->data; | |
484 | struct strbuf cmdbuf = STRBUF_INIT; | |
485 | struct child_process *helper; | |
486 | int r, duped, ret = 0; | |
487 | FILE *input; | |
488 | ||
489 | helper = get_helper(transport); | |
490 | ||
491 | /* | |
492 | * Yes, dup the pipe another time, as we need unbuffered version | |
493 | * of input pipe as FILE*. fclose() closes the underlying fd and | |
494 | * stream buffering only can be changed before first I/O operation | |
495 | * on it. | |
496 | */ | |
497 | duped = dup(helper->out); | |
498 | if (duped < 0) | |
499 | die_errno("Can't dup helper output fd"); | |
500 | input = xfdopen(duped, "r"); | |
501 | setvbuf(input, NULL, _IONBF, 0); | |
502 | ||
503 | /* | |
504 | * Handle --upload-pack and friends. This is fire and forget... | |
505 | * just warn if it fails. | |
506 | */ | |
507 | if (strcmp(name, exec)) { | |
508 | r = set_helper_option(transport, "servpath", exec); | |
509 | if (r > 0) | |
510 | warning("Setting remote service path not supported by protocol."); | |
511 | else if (r < 0) | |
512 | warning("Invalid remote service path."); | |
513 | } | |
514 | ||
515 | if (data->connect) | |
516 | strbuf_addf(&cmdbuf, "connect %s\n", name); | |
517 | else | |
518 | goto exit; | |
519 | ||
520 | sendline(data, &cmdbuf); | |
521 | recvline_fh(input, &cmdbuf); | |
522 | if (!strcmp(cmdbuf.buf, "")) { | |
523 | data->no_disconnect_req = 1; | |
524 | if (debug) | |
525 | fprintf(stderr, "Debug: Smart transport connection " | |
526 | "ready.\n"); | |
527 | ret = 1; | |
528 | } else if (!strcmp(cmdbuf.buf, "fallback")) { | |
529 | if (debug) | |
530 | fprintf(stderr, "Debug: Falling back to dumb " | |
531 | "transport.\n"); | |
532 | } else | |
533 | die("Unknown response to connect: %s", | |
534 | cmdbuf.buf); | |
535 | ||
536 | exit: | |
537 | fclose(input); | |
538 | return ret; | |
539 | } | |
540 | ||
541 | static int process_connect(struct transport *transport, | |
542 | int for_push) | |
543 | { | |
544 | struct helper_data *data = transport->data; | |
545 | const char *name; | |
546 | const char *exec; | |
547 | ||
548 | name = for_push ? "git-receive-pack" : "git-upload-pack"; | |
549 | if (for_push) | |
550 | exec = data->transport_options.receivepack; | |
551 | else | |
552 | exec = data->transport_options.uploadpack; | |
553 | ||
554 | return process_connect_service(transport, name, exec); | |
555 | } | |
556 | ||
b236752a IL |
557 | static int connect_helper(struct transport *transport, const char *name, |
558 | const char *exec, int fd[2]) | |
559 | { | |
560 | struct helper_data *data = transport->data; | |
561 | ||
562 | /* Get_helper so connect is inited. */ | |
563 | get_helper(transport); | |
564 | if (!data->connect) | |
565 | die("Operation not supported by protocol."); | |
566 | ||
567 | if (!process_connect_service(transport, name, exec)) | |
568 | die("Can't connect to subservice %s.", name); | |
569 | ||
570 | fd[0] = data->helper->out; | |
571 | fd[1] = data->helper->in; | |
572 | return 0; | |
573 | } | |
574 | ||
6eb996b5 | 575 | static int fetch(struct transport *transport, |
37148311 | 576 | int nr_heads, struct ref **to_fetch) |
6eb996b5 DB |
577 | { |
578 | struct helper_data *data = transport->data; | |
579 | int i, count; | |
580 | ||
fa8c097c IL |
581 | if (process_connect(transport, 0)) { |
582 | do_take_over(transport); | |
583 | return transport->fetch(transport, nr_heads, to_fetch); | |
584 | } | |
585 | ||
6eb996b5 DB |
586 | count = 0; |
587 | for (i = 0; i < nr_heads; i++) | |
588 | if (!(to_fetch[i]->status & REF_STATUS_UPTODATE)) | |
589 | count++; | |
590 | ||
591 | if (!count) | |
592 | return 0; | |
593 | ||
594 | if (data->fetch) | |
595 | return fetch_with_fetch(transport, nr_heads, to_fetch); | |
596 | ||
e65e91ed DB |
597 | if (data->import) |
598 | return fetch_with_import(transport, nr_heads, to_fetch); | |
599 | ||
6eb996b5 DB |
600 | return -1; |
601 | } | |
602 | ||
d2e73c6f SR |
603 | static void push_update_ref_status(struct strbuf *buf, |
604 | struct ref **ref, | |
605 | struct ref *remote_refs) | |
606 | { | |
607 | char *refname, *msg; | |
608 | int status; | |
609 | ||
610 | if (!prefixcmp(buf->buf, "ok ")) { | |
611 | status = REF_STATUS_OK; | |
612 | refname = buf->buf + 3; | |
613 | } else if (!prefixcmp(buf->buf, "error ")) { | |
614 | status = REF_STATUS_REMOTE_REJECT; | |
615 | refname = buf->buf + 6; | |
616 | } else | |
82247e9b | 617 | die("expected ok/error, helper said '%s'", buf->buf); |
d2e73c6f SR |
618 | |
619 | msg = strchr(refname, ' '); | |
620 | if (msg) { | |
621 | struct strbuf msg_buf = STRBUF_INIT; | |
622 | const char *end; | |
623 | ||
624 | *msg++ = '\0'; | |
625 | if (!unquote_c_style(&msg_buf, msg, &end)) | |
626 | msg = strbuf_detach(&msg_buf, NULL); | |
627 | else | |
628 | msg = xstrdup(msg); | |
629 | strbuf_release(&msg_buf); | |
630 | ||
631 | if (!strcmp(msg, "no match")) { | |
632 | status = REF_STATUS_NONE; | |
633 | free(msg); | |
634 | msg = NULL; | |
635 | } | |
636 | else if (!strcmp(msg, "up to date")) { | |
637 | status = REF_STATUS_UPTODATE; | |
638 | free(msg); | |
639 | msg = NULL; | |
640 | } | |
641 | else if (!strcmp(msg, "non-fast forward")) { | |
642 | status = REF_STATUS_REJECT_NONFASTFORWARD; | |
643 | free(msg); | |
644 | msg = NULL; | |
645 | } | |
646 | } | |
647 | ||
648 | if (*ref) | |
649 | *ref = find_ref_by_name(*ref, refname); | |
650 | if (!*ref) | |
651 | *ref = find_ref_by_name(remote_refs, refname); | |
652 | if (!*ref) { | |
653 | warning("helper reported unexpected status of %s", refname); | |
654 | return; | |
655 | } | |
656 | ||
657 | if ((*ref)->status != REF_STATUS_NONE) { | |
658 | /* | |
659 | * Earlier, the ref was marked not to be pushed, so ignore the ref | |
660 | * status reported by the remote helper if the latter is 'no match'. | |
661 | */ | |
662 | if (status == REF_STATUS_NONE) | |
663 | return; | |
664 | } | |
665 | ||
666 | (*ref)->status = status; | |
667 | (*ref)->remote_status = msg; | |
668 | } | |
669 | ||
670 | static void push_update_refs_status(struct helper_data *data, | |
671 | struct ref *remote_refs) | |
672 | { | |
673 | struct strbuf buf = STRBUF_INIT; | |
674 | struct ref *ref = remote_refs; | |
675 | for (;;) { | |
676 | recvline(data, &buf); | |
677 | if (!buf.len) | |
678 | break; | |
679 | ||
680 | push_update_ref_status(&buf, &ref, remote_refs); | |
681 | } | |
682 | strbuf_release(&buf); | |
683 | } | |
684 | ||
73b49a75 | 685 | static int push_refs_with_push(struct transport *transport, |
ae4efe19 SP |
686 | struct ref *remote_refs, int flags) |
687 | { | |
688 | int force_all = flags & TRANSPORT_PUSH_FORCE; | |
689 | int mirror = flags & TRANSPORT_PUSH_MIRROR; | |
690 | struct helper_data *data = transport->data; | |
691 | struct strbuf buf = STRBUF_INIT; | |
ae4efe19 SP |
692 | struct ref *ref; |
693 | ||
c0aa335c | 694 | get_helper(transport); |
ae4efe19 SP |
695 | if (!data->push) |
696 | return 1; | |
697 | ||
698 | for (ref = remote_refs; ref; ref = ref->next) { | |
20e8b465 | 699 | if (!ref->peer_ref && !mirror) |
ae4efe19 SP |
700 | continue; |
701 | ||
20e8b465 TRC |
702 | /* Check for statuses set by set_ref_status_for_push() */ |
703 | switch (ref->status) { | |
704 | case REF_STATUS_REJECT_NONFASTFORWARD: | |
705 | case REF_STATUS_UPTODATE: | |
ae4efe19 | 706 | continue; |
20e8b465 TRC |
707 | default: |
708 | ; /* do nothing */ | |
ae4efe19 SP |
709 | } |
710 | ||
711 | if (force_all) | |
712 | ref->force = 1; | |
713 | ||
714 | strbuf_addstr(&buf, "push "); | |
715 | if (!ref->deletion) { | |
716 | if (ref->force) | |
717 | strbuf_addch(&buf, '+'); | |
718 | if (ref->peer_ref) | |
719 | strbuf_addstr(&buf, ref->peer_ref->name); | |
720 | else | |
721 | strbuf_addstr(&buf, sha1_to_hex(ref->new_sha1)); | |
722 | } | |
723 | strbuf_addch(&buf, ':'); | |
724 | strbuf_addstr(&buf, ref->name); | |
725 | strbuf_addch(&buf, '\n'); | |
726 | } | |
d8f67d20 CB |
727 | if (buf.len == 0) |
728 | return 0; | |
ae4efe19 | 729 | |
ae4efe19 SP |
730 | standard_options(transport); |
731 | ||
732 | if (flags & TRANSPORT_PUSH_DRY_RUN) { | |
733 | if (set_helper_option(transport, "dry-run", "true") != 0) | |
734 | die("helper %s does not support dry-run", data->name); | |
735 | } | |
736 | ||
737 | strbuf_addch(&buf, '\n'); | |
bf3c523c | 738 | sendline(data, &buf); |
ae4efe19 | 739 | strbuf_release(&buf); |
d2e73c6f SR |
740 | |
741 | push_update_refs_status(data, remote_refs); | |
ae4efe19 SP |
742 | return 0; |
743 | } | |
744 | ||
73b49a75 SR |
745 | static int push_refs_with_export(struct transport *transport, |
746 | struct ref *remote_refs, int flags) | |
747 | { | |
748 | struct ref *ref; | |
749 | struct child_process *helper, exporter; | |
750 | struct helper_data *data = transport->data; | |
183113a5 | 751 | struct string_list revlist_args = STRING_LIST_INIT_NODUP; |
73b49a75 SR |
752 | struct strbuf buf = STRBUF_INIT; |
753 | ||
754 | helper = get_helper(transport); | |
755 | ||
756 | write_constant(helper->in, "export\n"); | |
757 | ||
73b49a75 SR |
758 | strbuf_reset(&buf); |
759 | ||
760 | for (ref = remote_refs; ref; ref = ref->next) { | |
761 | char *private; | |
762 | unsigned char sha1[20]; | |
763 | ||
764 | if (!data->refspecs) | |
765 | continue; | |
766 | private = apply_refspecs(data->refspecs, data->refspec_nr, ref->name); | |
767 | if (private && !get_sha1(private, sha1)) { | |
768 | strbuf_addf(&buf, "^%s", private); | |
1d2f80fa | 769 | string_list_append(&revlist_args, strbuf_detach(&buf, NULL)); |
73b49a75 | 770 | } |
2faa1527 | 771 | free(private); |
73b49a75 | 772 | |
105fe3e4 SR |
773 | if (ref->deletion) { |
774 | die("remote-helpers do not support ref deletion"); | |
775 | } | |
776 | ||
3ea7d094 JK |
777 | if (ref->peer_ref) |
778 | string_list_append(&revlist_args, ref->peer_ref->name); | |
73b49a75 SR |
779 | |
780 | } | |
781 | ||
a515ebe9 | 782 | if (get_exporter(transport, &exporter, &revlist_args)) |
73b49a75 SR |
783 | die("Couldn't run fast-export"); |
784 | ||
cc567322 SR |
785 | if (finish_command(&exporter)) |
786 | die("Error while running fast-export"); | |
6c8151a3 | 787 | push_update_refs_status(data, remote_refs); |
73b49a75 SR |
788 | return 0; |
789 | } | |
790 | ||
791 | static int push_refs(struct transport *transport, | |
792 | struct ref *remote_refs, int flags) | |
793 | { | |
794 | struct helper_data *data = transport->data; | |
795 | ||
796 | if (process_connect(transport, 1)) { | |
797 | do_take_over(transport); | |
798 | return transport->push_refs(transport, remote_refs, flags); | |
799 | } | |
800 | ||
801 | if (!remote_refs) { | |
802 | fprintf(stderr, "No refs in common and none specified; doing nothing.\n" | |
803 | "Perhaps you should specify a branch such as 'master'.\n"); | |
804 | return 0; | |
805 | } | |
806 | ||
807 | if (data->push) | |
808 | return push_refs_with_push(transport, remote_refs, flags); | |
809 | ||
810 | if (data->export) | |
811 | return push_refs_with_export(transport, remote_refs, flags); | |
812 | ||
813 | return -1; | |
814 | } | |
815 | ||
816 | ||
f8ec9167 DB |
817 | static int has_attribute(const char *attrs, const char *attr) { |
818 | int len; | |
819 | if (!attrs) | |
820 | return 0; | |
821 | ||
822 | len = strlen(attr); | |
823 | for (;;) { | |
824 | const char *space = strchrnul(attrs, ' '); | |
825 | if (len == space - attrs && !strncmp(attrs, attr, len)) | |
826 | return 1; | |
827 | if (!*space) | |
828 | return 0; | |
829 | attrs = space + 1; | |
830 | } | |
831 | } | |
832 | ||
6eb996b5 DB |
833 | static struct ref *get_refs_list(struct transport *transport, int for_push) |
834 | { | |
292ce46b | 835 | struct helper_data *data = transport->data; |
6eb996b5 DB |
836 | struct child_process *helper; |
837 | struct ref *ret = NULL; | |
838 | struct ref **tail = &ret; | |
839 | struct ref *posn; | |
840 | struct strbuf buf = STRBUF_INIT; | |
6eb996b5 DB |
841 | |
842 | helper = get_helper(transport); | |
2d14d65c | 843 | |
fa8c097c IL |
844 | if (process_connect(transport, for_push)) { |
845 | do_take_over(transport); | |
846 | return transport->get_refs_list(transport, for_push); | |
847 | } | |
848 | ||
ae4efe19 SP |
849 | if (data->push && for_push) |
850 | write_str_in_full(helper->in, "list for-push\n"); | |
851 | else | |
852 | write_str_in_full(helper->in, "list\n"); | |
6eb996b5 | 853 | |
6eb996b5 DB |
854 | while (1) { |
855 | char *eov, *eon; | |
bf3c523c | 856 | recvline(data, &buf); |
6eb996b5 DB |
857 | |
858 | if (!*buf.buf) | |
859 | break; | |
860 | ||
861 | eov = strchr(buf.buf, ' '); | |
862 | if (!eov) | |
863 | die("Malformed response in ref list: %s", buf.buf); | |
864 | eon = strchr(eov + 1, ' '); | |
865 | *eov = '\0'; | |
866 | if (eon) | |
867 | *eon = '\0'; | |
868 | *tail = alloc_ref(eov + 1); | |
869 | if (buf.buf[0] == '@') | |
870 | (*tail)->symref = xstrdup(buf.buf + 1); | |
871 | else if (buf.buf[0] != '?') | |
872 | get_sha1_hex(buf.buf, (*tail)->old_sha1); | |
f8ec9167 DB |
873 | if (eon) { |
874 | if (has_attribute(eon + 1, "unchanged")) { | |
875 | (*tail)->status |= REF_STATUS_UPTODATE; | |
876 | read_ref((*tail)->name, (*tail)->old_sha1); | |
877 | } | |
878 | } | |
6eb996b5 DB |
879 | tail = &((*tail)->next); |
880 | } | |
bf3c523c IL |
881 | if (debug) |
882 | fprintf(stderr, "Debug: Read ref listing.\n"); | |
6eb996b5 DB |
883 | strbuf_release(&buf); |
884 | ||
885 | for (posn = ret; posn; posn = posn->next) | |
886 | resolve_remote_symref(posn, ret); | |
887 | ||
888 | return ret; | |
889 | } | |
890 | ||
c9e388bb | 891 | int transport_helper_init(struct transport *transport, const char *name) |
6eb996b5 DB |
892 | { |
893 | struct helper_data *data = xcalloc(sizeof(*data), 1); | |
c9e388bb | 894 | data->name = name; |
6eb996b5 | 895 | |
bf3c523c IL |
896 | if (getenv("GIT_TRANSPORT_HELPER_DEBUG")) |
897 | debug = 1; | |
898 | ||
6eb996b5 | 899 | transport->data = data; |
ef08ef9e | 900 | transport->set_option = set_helper_option; |
6eb996b5 DB |
901 | transport->get_refs_list = get_refs_list; |
902 | transport->fetch = fetch; | |
ae4efe19 | 903 | transport->push_refs = push_refs; |
f2a37151 | 904 | transport->disconnect = release_helper; |
b236752a | 905 | transport->connect = connect_helper; |
61b075bd | 906 | transport->smart_options = &(data->transport_options); |
6eb996b5 DB |
907 | return 0; |
908 | } | |
419f37db IL |
909 | |
910 | /* | |
911 | * Linux pipes can buffer 65536 bytes at once (and most platforms can | |
912 | * buffer less), so attempt reads and writes with up to that size. | |
913 | */ | |
914 | #define BUFFERSIZE 65536 | |
915 | /* This should be enough to hold debugging message. */ | |
916 | #define PBUFFERSIZE 8192 | |
917 | ||
918 | /* Print bidirectional transfer loop debug message. */ | |
919 | static void transfer_debug(const char *fmt, ...) | |
920 | { | |
921 | va_list args; | |
922 | char msgbuf[PBUFFERSIZE]; | |
923 | static int debug_enabled = -1; | |
924 | ||
925 | if (debug_enabled < 0) | |
926 | debug_enabled = getenv("GIT_TRANSLOOP_DEBUG") ? 1 : 0; | |
927 | if (!debug_enabled) | |
928 | return; | |
929 | ||
930 | va_start(args, fmt); | |
931 | vsnprintf(msgbuf, PBUFFERSIZE, fmt, args); | |
932 | va_end(args); | |
933 | fprintf(stderr, "Transfer loop debugging: %s\n", msgbuf); | |
934 | } | |
935 | ||
936 | /* Stream state: More data may be coming in this direction. */ | |
937 | #define SSTATE_TRANSFERING 0 | |
938 | /* | |
939 | * Stream state: No more data coming in this direction, flushing rest of | |
940 | * data. | |
941 | */ | |
942 | #define SSTATE_FLUSHING 1 | |
943 | /* Stream state: Transfer in this direction finished. */ | |
944 | #define SSTATE_FINISHED 2 | |
945 | ||
946 | #define STATE_NEEDS_READING(state) ((state) <= SSTATE_TRANSFERING) | |
947 | #define STATE_NEEDS_WRITING(state) ((state) <= SSTATE_FLUSHING) | |
948 | #define STATE_NEEDS_CLOSING(state) ((state) == SSTATE_FLUSHING) | |
949 | ||
950 | /* Unidirectional transfer. */ | |
951 | struct unidirectional_transfer { | |
952 | /* Source */ | |
953 | int src; | |
954 | /* Destination */ | |
955 | int dest; | |
956 | /* Is source socket? */ | |
957 | int src_is_sock; | |
958 | /* Is destination socket? */ | |
959 | int dest_is_sock; | |
960 | /* Transfer state (TRANSFERING/FLUSHING/FINISHED) */ | |
961 | int state; | |
962 | /* Buffer. */ | |
963 | char buf[BUFFERSIZE]; | |
964 | /* Buffer used. */ | |
965 | size_t bufuse; | |
966 | /* Name of source. */ | |
967 | const char *src_name; | |
968 | /* Name of destination. */ | |
969 | const char *dest_name; | |
970 | }; | |
971 | ||
972 | /* Closes the target (for writing) if transfer has finished. */ | |
973 | static void udt_close_if_finished(struct unidirectional_transfer *t) | |
974 | { | |
975 | if (STATE_NEEDS_CLOSING(t->state) && !t->bufuse) { | |
976 | t->state = SSTATE_FINISHED; | |
977 | if (t->dest_is_sock) | |
978 | shutdown(t->dest, SHUT_WR); | |
979 | else | |
980 | close(t->dest); | |
981 | transfer_debug("Closed %s.", t->dest_name); | |
982 | } | |
983 | } | |
984 | ||
985 | /* | |
986 | * Tries to read read data from source into buffer. If buffer is full, | |
987 | * no data is read. Returns 0 on success, -1 on error. | |
988 | */ | |
989 | static int udt_do_read(struct unidirectional_transfer *t) | |
990 | { | |
991 | ssize_t bytes; | |
992 | ||
993 | if (t->bufuse == BUFFERSIZE) | |
994 | return 0; /* No space for more. */ | |
995 | ||
996 | transfer_debug("%s is readable", t->src_name); | |
997 | bytes = read(t->src, t->buf + t->bufuse, BUFFERSIZE - t->bufuse); | |
998 | if (bytes < 0 && errno != EWOULDBLOCK && errno != EAGAIN && | |
999 | errno != EINTR) { | |
1000 | error("read(%s) failed: %s", t->src_name, strerror(errno)); | |
1001 | return -1; | |
1002 | } else if (bytes == 0) { | |
1003 | transfer_debug("%s EOF (with %i bytes in buffer)", | |
1004 | t->src_name, t->bufuse); | |
1005 | t->state = SSTATE_FLUSHING; | |
1006 | } else if (bytes > 0) { | |
1007 | t->bufuse += bytes; | |
1008 | transfer_debug("Read %i bytes from %s (buffer now at %i)", | |
1009 | (int)bytes, t->src_name, (int)t->bufuse); | |
1010 | } | |
1011 | return 0; | |
1012 | } | |
1013 | ||
1014 | /* Tries to write data from buffer into destination. If buffer is empty, | |
1015 | * no data is written. Returns 0 on success, -1 on error. | |
1016 | */ | |
1017 | static int udt_do_write(struct unidirectional_transfer *t) | |
1018 | { | |
803dbdb9 | 1019 | ssize_t bytes; |
419f37db IL |
1020 | |
1021 | if (t->bufuse == 0) | |
1022 | return 0; /* Nothing to write. */ | |
1023 | ||
1024 | transfer_debug("%s is writable", t->dest_name); | |
1025 | bytes = write(t->dest, t->buf, t->bufuse); | |
1026 | if (bytes < 0 && errno != EWOULDBLOCK && errno != EAGAIN && | |
1027 | errno != EINTR) { | |
1028 | error("write(%s) failed: %s", t->dest_name, strerror(errno)); | |
1029 | return -1; | |
1030 | } else if (bytes > 0) { | |
1031 | t->bufuse -= bytes; | |
1032 | if (t->bufuse) | |
1033 | memmove(t->buf, t->buf + bytes, t->bufuse); | |
1034 | transfer_debug("Wrote %i bytes to %s (buffer now at %i)", | |
1035 | (int)bytes, t->dest_name, (int)t->bufuse); | |
1036 | } | |
1037 | return 0; | |
1038 | } | |
1039 | ||
1040 | ||
1041 | /* State of bidirectional transfer loop. */ | |
1042 | struct bidirectional_transfer_state { | |
1043 | /* Direction from program to git. */ | |
1044 | struct unidirectional_transfer ptg; | |
1045 | /* Direction from git to program. */ | |
1046 | struct unidirectional_transfer gtp; | |
1047 | }; | |
1048 | ||
1049 | static void *udt_copy_task_routine(void *udt) | |
1050 | { | |
1051 | struct unidirectional_transfer *t = (struct unidirectional_transfer *)udt; | |
1052 | while (t->state != SSTATE_FINISHED) { | |
1053 | if (STATE_NEEDS_READING(t->state)) | |
1054 | if (udt_do_read(t)) | |
1055 | return NULL; | |
1056 | if (STATE_NEEDS_WRITING(t->state)) | |
1057 | if (udt_do_write(t)) | |
1058 | return NULL; | |
1059 | if (STATE_NEEDS_CLOSING(t->state)) | |
1060 | udt_close_if_finished(t); | |
1061 | } | |
1062 | return udt; /* Just some non-NULL value. */ | |
1063 | } | |
1064 | ||
1065 | #ifndef NO_PTHREADS | |
1066 | ||
1067 | /* | |
1068 | * Join thread, with apporiate errors on failure. Name is name for the | |
1069 | * thread (for error messages). Returns 0 on success, 1 on failure. | |
1070 | */ | |
1071 | static int tloop_join(pthread_t thread, const char *name) | |
1072 | { | |
1073 | int err; | |
1074 | void *tret; | |
1075 | err = pthread_join(thread, &tret); | |
1076 | if (!tret) { | |
1077 | error("%s thread failed", name); | |
1078 | return 1; | |
1079 | } | |
1080 | if (err) { | |
1081 | error("%s thread failed to join: %s", name, strerror(err)); | |
1082 | return 1; | |
1083 | } | |
1084 | return 0; | |
1085 | } | |
1086 | ||
1087 | /* | |
1088 | * Spawn the transfer tasks and then wait for them. Returns 0 on success, | |
1089 | * -1 on failure. | |
1090 | */ | |
1091 | static int tloop_spawnwait_tasks(struct bidirectional_transfer_state *s) | |
1092 | { | |
1093 | pthread_t gtp_thread; | |
1094 | pthread_t ptg_thread; | |
1095 | int err; | |
1096 | int ret = 0; | |
1097 | err = pthread_create(>p_thread, NULL, udt_copy_task_routine, | |
1098 | &s->gtp); | |
1099 | if (err) | |
1100 | die("Can't start thread for copying data: %s", strerror(err)); | |
1101 | err = pthread_create(&ptg_thread, NULL, udt_copy_task_routine, | |
1102 | &s->ptg); | |
1103 | if (err) | |
1104 | die("Can't start thread for copying data: %s", strerror(err)); | |
1105 | ||
1106 | ret |= tloop_join(gtp_thread, "Git to program copy"); | |
1107 | ret |= tloop_join(ptg_thread, "Program to git copy"); | |
1108 | return ret; | |
1109 | } | |
1110 | #else | |
1111 | ||
1112 | /* Close the source and target (for writing) for transfer. */ | |
1113 | static void udt_kill_transfer(struct unidirectional_transfer *t) | |
1114 | { | |
1115 | t->state = SSTATE_FINISHED; | |
1116 | /* | |
1117 | * Socket read end left open isn't a disaster if nobody | |
1118 | * attempts to read from it (mingw compat headers do not | |
1119 | * have SHUT_RD)... | |
1120 | * | |
1121 | * We can't fully close the socket since otherwise gtp | |
1122 | * task would first close the socket it sends data to | |
1123 | * while closing the ptg file descriptors. | |
1124 | */ | |
1125 | if (!t->src_is_sock) | |
1126 | close(t->src); | |
1127 | if (t->dest_is_sock) | |
1128 | shutdown(t->dest, SHUT_WR); | |
1129 | else | |
1130 | close(t->dest); | |
1131 | } | |
1132 | ||
1133 | /* | |
1134 | * Join process, with apporiate errors on failure. Name is name for the | |
1135 | * process (for error messages). Returns 0 on success, 1 on failure. | |
1136 | */ | |
1137 | static int tloop_join(pid_t pid, const char *name) | |
1138 | { | |
1139 | int tret; | |
1140 | if (waitpid(pid, &tret, 0) < 0) { | |
1141 | error("%s process failed to wait: %s", name, strerror(errno)); | |
1142 | return 1; | |
1143 | } | |
1144 | if (!WIFEXITED(tret) || WEXITSTATUS(tret)) { | |
1145 | error("%s process failed", name); | |
1146 | return 1; | |
1147 | } | |
1148 | return 0; | |
1149 | } | |
1150 | ||
1151 | /* | |
1152 | * Spawn the transfer tasks and then wait for them. Returns 0 on success, | |
1153 | * -1 on failure. | |
1154 | */ | |
1155 | static int tloop_spawnwait_tasks(struct bidirectional_transfer_state *s) | |
1156 | { | |
1157 | pid_t pid1, pid2; | |
1158 | int ret = 0; | |
1159 | ||
1160 | /* Fork thread #1: git to program. */ | |
1161 | pid1 = fork(); | |
1162 | if (pid1 < 0) | |
1163 | die_errno("Can't start thread for copying data"); | |
1164 | else if (pid1 == 0) { | |
1165 | udt_kill_transfer(&s->ptg); | |
1166 | exit(udt_copy_task_routine(&s->gtp) ? 0 : 1); | |
1167 | } | |
1168 | ||
1169 | /* Fork thread #2: program to git. */ | |
1170 | pid2 = fork(); | |
1171 | if (pid2 < 0) | |
1172 | die_errno("Can't start thread for copying data"); | |
1173 | else if (pid2 == 0) { | |
1174 | udt_kill_transfer(&s->gtp); | |
1175 | exit(udt_copy_task_routine(&s->ptg) ? 0 : 1); | |
1176 | } | |
1177 | ||
1178 | /* | |
1179 | * Close both streams in parent as to not interfere with | |
1180 | * end of file detection and wait for both tasks to finish. | |
1181 | */ | |
1182 | udt_kill_transfer(&s->gtp); | |
1183 | udt_kill_transfer(&s->ptg); | |
1184 | ret |= tloop_join(pid1, "Git to program copy"); | |
1185 | ret |= tloop_join(pid2, "Program to git copy"); | |
1186 | return ret; | |
1187 | } | |
1188 | #endif | |
1189 | ||
1190 | /* | |
1191 | * Copies data from stdin to output and from input to stdout simultaneously. | |
1192 | * Additionally filtering through given filter. If filter is NULL, uses | |
1193 | * identity filter. | |
1194 | */ | |
1195 | int bidirectional_transfer_loop(int input, int output) | |
1196 | { | |
1197 | struct bidirectional_transfer_state state; | |
1198 | ||
1199 | /* Fill the state fields. */ | |
1200 | state.ptg.src = input; | |
1201 | state.ptg.dest = 1; | |
1202 | state.ptg.src_is_sock = (input == output); | |
1203 | state.ptg.dest_is_sock = 0; | |
1204 | state.ptg.state = SSTATE_TRANSFERING; | |
1205 | state.ptg.bufuse = 0; | |
1206 | state.ptg.src_name = "remote input"; | |
1207 | state.ptg.dest_name = "stdout"; | |
1208 | ||
1209 | state.gtp.src = 0; | |
1210 | state.gtp.dest = output; | |
1211 | state.gtp.src_is_sock = 0; | |
1212 | state.gtp.dest_is_sock = (input == output); | |
1213 | state.gtp.state = SSTATE_TRANSFERING; | |
1214 | state.gtp.bufuse = 0; | |
1215 | state.gtp.src_name = "stdin"; | |
1216 | state.gtp.dest_name = "remote output"; | |
1217 | ||
1218 | return tloop_spawnwait_tasks(&state); | |
1219 | } |