Install the library headers.
[ashd.git] / src / callfcgi.c
... / ...
CommitLineData
1/*
2 ashd - A Sane HTTP Daemon
3 Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com>
4
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17*/
18
19/*
20 * XXX: This program is mostly copied from callscgi. It may be
21 * reasonable to unify some of their shared code in a source file.
22 */
23
24/*
25 * XXX: All the various ways to start a child process makes this
26 * program quite ugly at the moment. It is unclear whether it is
27 * meaningfully possible to unify them better than they currently are.
28 */
29
30#include <stdlib.h>
31#include <stdio.h>
32#include <unistd.h>
33#include <string.h>
34#include <fcntl.h>
35#include <ctype.h>
36#include <sys/socket.h>
37#include <sys/un.h>
38#include <netinet/in.h>
39#include <netdb.h>
40#include <sys/signal.h>
41#include <errno.h>
42
43#ifdef HAVE_CONFIG_H
44#include <config.h>
45#endif
46#include <utils.h>
47#include <req.h>
48#include <log.h>
49#include <mt.h>
50#include <mtio.h>
51
52#define FCGI_BEGIN_REQUEST 1
53#define FCGI_ABORT_REQUEST 2
54#define FCGI_END_REQUEST 3
55#define FCGI_PARAMS 4
56#define FCGI_STDIN 5
57#define FCGI_STDOUT 6
58#define FCGI_STDERR 7
59
60static char **progspec;
61static char *sockid, *unspec, *inspec;
62static int nolisten;
63static struct sockaddr *curaddr;
64static size_t caddrlen;
65static int cafamily, isanon;
66static pid_t child;
67
68static struct addrinfo *resolv(int flags)
69{
70 int ret;
71 struct addrinfo *ai, h;
72 char *name, *srv, *p;
73
74 if((p = strchr(inspec, ':')) != NULL) {
75 name = smalloc(p - inspec + 1);
76 memcpy(name, inspec, p - inspec);
77 name[p - inspec] = 0;
78 srv = p + 1;
79 } else {
80 name = sstrdup("localhost");
81 srv = inspec;
82 }
83 memset(&h, 0, sizeof(h));
84 h.ai_family = AF_UNSPEC;
85 h.ai_socktype = SOCK_STREAM;
86 h.ai_flags = flags;
87 ret = getaddrinfo(name, srv, &h, &ai);
88 free(name);
89 if(ret != 0) {
90 flog(LOG_ERR, "could not resolve TCP specification `%s': %s", inspec, gai_strerror(ret));
91 exit(1);
92 }
93 return(ai);
94}
95
96static char *mksockid(char *sockid)
97{
98 char *home;
99
100 home = getenv("HOME");
101 if(home && !access(sprintf3("%s/.ashd/sockets/", home), X_OK))
102 return(sprintf3("%s/.ashd/sockets/fcgi-p-%s", home, sockid));
103 return(sprintf3("/tmp/fcgi-%i-%s", getuid(), sockid));
104}
105
106static char *mkanonid(void)
107{
108 char *home;
109 char *tmpl;
110 int fd;
111
112 home = getenv("HOME");
113 if(home && !access(sprintf3("%s/.ashd/sockets/", home), X_OK))
114 tmpl = sprintf2("%s/.ashd/sockets/fcgi-a-XXXXXX", home);
115 else
116 tmpl = sprintf2("/tmp/fcgi-a-%i-XXXXXX", getuid());
117 if((fd = mkstemp(tmpl)) < 0) {
118 flog(LOG_ERR, "could not create anonymous socket `%s': %s", tmpl, strerror(errno));
119 exit(1);
120 }
121 close(fd);
122 unlink(tmpl);
123 return(tmpl);
124}
125
126static void startlisten(void)
127{
128 int i, fd;
129 struct addrinfo *ai, *cai;
130 char *unpath;
131 struct sockaddr_un unm;
132 char *aname;
133
134 isanon = 0;
135 if(inspec != NULL) {
136 fd = -1;
137 for(cai = ai = resolv(AI_PASSIVE); cai != NULL; cai = cai->ai_next) {
138 if((fd = socket(cai->ai_family, cai->ai_socktype, cai->ai_protocol)) < 0)
139 continue;
140 if(bind(fd, cai->ai_addr, cai->ai_addrlen)) {
141 close(fd);
142 fd = -1;
143 continue;
144 }
145 if(listen(fd, 128)) {
146 close(fd);
147 fd = -1;
148 continue;
149 }
150 break;
151 }
152 freeaddrinfo(ai);
153 if(fd < 0) {
154 flog(LOG_ERR, "could not bind to specified TCP address: %s", strerror(errno));
155 exit(1);
156 }
157 } else if((unspec != NULL) || (sockid != NULL)) {
158 if((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
159 flog(LOG_ERR, "could not create Unix socket: %s", strerror(errno));
160 exit(1);
161 }
162 if(unspec != NULL)
163 unpath = unspec;
164 else
165 unpath = mksockid(sockid);
166 unlink(unpath);
167 unm.sun_family = AF_UNIX;
168 strcpy(unm.sun_path, unpath);
169 if(bind(fd, (struct sockaddr *)&unm, sizeof(unm))) {
170 flog(LOG_ERR, "could not bind Unix socket to `%s': %s", unspec, strerror(errno));
171 exit(1);
172 }
173 if(listen(fd, 128)) {
174 flog(LOG_ERR, "listen: %s", strerror(errno));
175 exit(1);
176 }
177 } else {
178 if((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
179 flog(LOG_ERR, "could not create Unix socket: %s", strerror(errno));
180 exit(1);
181 }
182 memset(&unm, 0, sizeof(unm));
183 aname = mkanonid();
184 unm.sun_family = AF_UNIX;
185 strcpy(unm.sun_path, aname);
186 free(aname);
187 if(bind(fd, (struct sockaddr *)&unm, sizeof(unm))) {
188 flog(LOG_ERR, "could not bind Unix socket to `%s': %s", unspec, strerror(errno));
189 exit(1);
190 }
191 if(listen(fd, 128)) {
192 flog(LOG_ERR, "listen: %s", strerror(errno));
193 exit(1);
194 }
195
196 curaddr = smalloc(caddrlen = sizeof(unm));
197 memcpy(curaddr, &unm, sizeof(unm));
198 cafamily = AF_UNIX;
199 isanon = 1;
200 }
201 if((child = fork()) < 0) {
202 flog(LOG_ERR, "could not fork: %s", strerror(errno));
203 exit(1);
204 }
205 if(child == 0) {
206 dup2(fd, 0);
207 for(i = 3; i < FD_SETSIZE; i++)
208 close(i);
209 execvp(*progspec, progspec);
210 flog(LOG_ERR, "callfcgi: %s: %s", *progspec, strerror(errno));
211 _exit(127);
212 }
213 close(fd);
214}
215
216static void startnolisten(void)
217{
218 int i, fd;
219
220 if((child = fork()) < 0) {
221 flog(LOG_ERR, "could not fork: %s", strerror(errno));
222 exit(1);
223 }
224 if(child == 0) {
225 for(i = 3; i < FD_SETSIZE; i++)
226 close(i);
227 if((fd = open("/dev/null", O_RDONLY)) < 0) {
228 flog(LOG_ERR, "/dev/null: %s", strerror(errno));
229 _exit(127);
230 }
231 dup2(fd, 0);
232 close(fd);
233 execvp(*progspec, progspec);
234 flog(LOG_ERR, "callfcgi: %s: %s", *progspec, strerror(errno));
235 _exit(127);
236 }
237}
238
239static int sconnect(void)
240{
241 int fd;
242 int err;
243 socklen_t errlen;
244
245 fd = socket(cafamily, SOCK_STREAM, 0);
246 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
247 while(1) {
248 if(connect(fd, curaddr, caddrlen)) {
249 if(errno == EINPROGRESS) {
250 block(fd, EV_WRITE, 30);
251 errlen = sizeof(err);
252 if(getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &errlen) || ((errno = err) != 0)) {
253 close(fd);
254 return(-1);
255 }
256 return(fd);
257 }
258 close(fd);
259 return(-1);
260 }
261 return(fd);
262 }
263}
264
265static int econnect(void)
266{
267 int fd;
268 struct addrinfo *ai, *cai;
269 int tries;
270 char *unpath;
271 struct sockaddr_un unm;
272
273 tries = 0;
274retry:
275 if(inspec != NULL) {
276 fd = -1;
277 for(cai = ai = resolv(0); cai != NULL; cai = cai->ai_next) {
278 if((fd = socket(cai->ai_family, cai->ai_socktype, cai->ai_protocol)) < 0)
279 continue;
280 if(connect(fd, cai->ai_addr, cai->ai_addrlen)) {
281 close(fd);
282 fd = -1;
283 continue;
284 }
285 break;
286 }
287 if(fd < 0) {
288 if(tries++ < nolisten) {
289 sleep(1);
290 goto retry;
291 }
292 flog(LOG_ERR, "could not connect to specified TCP address: %s", strerror(errno));
293 exit(1);
294 }
295 curaddr = smalloc(caddrlen = cai->ai_addrlen);
296 memcpy(curaddr, cai->ai_addr, caddrlen);
297 cafamily = cai->ai_family;
298 isanon = 0;
299 freeaddrinfo(ai);
300 return(fd);
301 } else if((unspec != NULL) || (sockid != NULL)) {
302 if((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
303 flog(LOG_ERR, "could not create Unix socket: %s", strerror(errno));
304 exit(1);
305 }
306 if(unspec != NULL)
307 unpath = unspec;
308 else
309 unpath = mksockid(sockid);
310 unlink(unpath);
311 unm.sun_family = AF_UNIX;
312 strcpy(unm.sun_path, unpath);
313 if(connect(fd, (struct sockaddr *)&unm, sizeof(unm))) {
314 close(fd);
315 if(tries++ < nolisten) {
316 sleep(1);
317 goto retry;
318 }
319 flog(LOG_ERR, "could not connect to Unix socket `%s': %s", unspec, strerror(errno));
320 exit(1);
321 }
322 curaddr = smalloc(caddrlen = sizeof(unm));
323 memcpy(curaddr, &unm, sizeof(unm));
324 cafamily = AF_UNIX;
325 isanon = 0;
326 return(fd);
327 } else {
328 flog(LOG_ERR, "callfcgi: cannot use an anonymous socket without a program to start");
329 exit(1);
330 }
331}
332
333static int startconn(void)
334{
335 if(*progspec) {
336 if(nolisten == 0)
337 startlisten();
338 else
339 startnolisten();
340 }
341 if(curaddr != NULL)
342 return(sconnect());
343 return(econnect());
344}
345
346static void killcuraddr(void)
347{
348 if(curaddr == NULL)
349 return;
350 if(isanon) {
351 unlink(((struct sockaddr_un *)curaddr)->sun_path);
352 if(child > 0)
353 kill(child, SIGTERM);
354 }
355 free(curaddr);
356 curaddr = NULL;
357}
358
359static int reconn(void)
360{
361 int fd;
362
363 if(curaddr != NULL) {
364 if((fd = sconnect()) >= 0)
365 return(fd);
366 killcuraddr();
367 }
368 return(startconn());
369}
370
371static off_t passdata(FILE *in, FILE *out)
372{
373 size_t read;
374 off_t total;
375 char buf[8192];
376
377 total = 0;
378 while(!feof(in)) {
379 read = fread(buf, 1, sizeof(buf), in);
380 if(ferror(in))
381 return(-1);
382 if(fwrite(buf, 1, read, out) != read)
383 return(-1);
384 total += read;
385 }
386 return(total);
387}
388
389static void bufcatkv(struct charbuf *dst, char *key, char *val)
390{
391 size_t kl, vl;
392
393 if((kl = strlen(key)) < 128) {
394 bufadd(*dst, kl);
395 } else {
396 bufadd(*dst, ((kl & 0x7f000000) >> 24) | 0x80);
397 bufadd(*dst, (kl & 0x00ff0000) >> 16);
398 bufadd(*dst, (kl & 0x0000ff00) >> 8);
399 bufadd(*dst, kl & 0x000000ff);
400 }
401 if((vl = strlen(val)) < 128) {
402 bufadd(*dst, vl);
403 } else {
404 bufadd(*dst, ((vl & 0x7f000000) >> 24) | 0x80);
405 bufadd(*dst, (vl & 0x00ff0000) >> 16);
406 bufadd(*dst, (vl & 0x0000ff00) >> 8);
407 bufadd(*dst, vl & 0x000000ff);
408 }
409 bufcat(*dst, key, kl);
410 bufcat(*dst, val, vl);
411}
412
413static void bufaddenv(struct charbuf *dst, char *name, char *fmt, ...)
414{
415 va_list args;
416 char *val = NULL;
417
418 va_start(args, fmt);
419 val = vsprintf2(fmt, args);
420 va_end(args);
421 bufcatkv(dst, name, val);
422 free(val);
423}
424
425static char *absolutify(char *file)
426{
427 static int inited = 0;
428 static char cwd[1024];
429
430 if(*file != '/') {
431 if(!inited) {
432 getcwd(cwd, sizeof(cwd));
433 inited = 1;
434 }
435 return(sprintf2("%s/%s", cwd, file));
436 }
437 return(sstrdup(file));
438}
439
440/* Mostly copied from callcgi. */
441static void mkcgienv(struct hthead *req, struct charbuf *dst)
442{
443 int i;
444 char *url, *unq, *qp, *h, *p;
445
446 bufaddenv(dst, "SERVER_SOFTWARE", "ashd/%s", VERSION);
447 bufaddenv(dst, "GATEWAY_INTERFACE", "CGI/1.1");
448 bufaddenv(dst, "SERVER_PROTOCOL", "%s", req->ver);
449 bufaddenv(dst, "REQUEST_METHOD", "%s", req->method);
450 bufaddenv(dst, "REQUEST_URI", "%s", req->url);
451 if((unq = unquoteurl(req->rest)) != NULL) {
452 bufaddenv(dst, "PATH_INFO", unq);
453 free(unq);
454 } else {
455 bufaddenv(dst, "PATH_INFO", req->rest);
456 }
457 url = sstrdup(req->url);
458 if((qp = strchr(url, '?')) != NULL)
459 *(qp++) = 0;
460 /* XXX: This is an ugly hack (I think), but though I can think of
461 * several alternatives, none seem to be better. */
462 if(*req->rest && (strlen(url) >= strlen(req->rest)) &&
463 !strcmp(req->rest, url + strlen(url) - strlen(req->rest))) {
464 bufaddenv(dst, "SCRIPT_NAME", "%.*s", (int)(strlen(url) - strlen(req->rest)), url);
465 } else {
466 bufaddenv(dst, "SCRIPT_NAME", "%s", url);
467 }
468 free(url);
469 bufaddenv(dst, "QUERY_STRING", "%s", qp?qp:"");
470 if((h = getheader(req, "Host")) != NULL)
471 bufaddenv(dst, "SERVER_NAME", "%s", h);
472 if((h = getheader(req, "X-Ash-Server-Port")) != NULL)
473 bufaddenv(dst, "SERVER_PORT", "%s", h);
474 if((h = getheader(req, "X-Ash-Remote-User")) != NULL)
475 bufaddenv(dst, "REMOTE_USER", "%s", h);
476 if(((h = getheader(req, "X-Ash-Protocol")) != NULL) && !strcmp(h, "https"))
477 bufaddenv(dst, "HTTPS", "on");
478 if((h = getheader(req, "X-Ash-Address")) != NULL)
479 bufaddenv(dst, "REMOTE_ADDR", "%s", h);
480 if((h = getheader(req, "Content-Type")) != NULL)
481 bufaddenv(dst, "CONTENT_TYPE", "%s", h);
482 if((h = getheader(req, "Content-Length")) != NULL)
483 bufaddenv(dst, "CONTENT_LENGTH", "%s", h);
484 else
485 bufaddenv(dst, "CONTENT_LENGTH", "0");
486 if((h = getheader(req, "X-Ash-File")) != NULL) {
487 h = absolutify(h);
488 bufaddenv(dst, "SCRIPT_FILENAME", "%s", h);
489 free(h);
490 }
491 for(i = 0; i < req->noheaders; i++) {
492 h = sprintf2("HTTP_%s", req->headers[i][0]);
493 for(p = h; *p; p++) {
494 if(isalnum(*p))
495 *p = toupper(*p);
496 else
497 *p = '_';
498 }
499 bufcatkv(dst, h, req->headers[i][1]);
500 free(h);
501 }
502}
503
504static char *defstatus(int code)
505{
506 if(code == 200)
507 return("OK");
508 else if(code == 201)
509 return("Created");
510 else if(code == 202)
511 return("Accepted");
512 else if(code == 204)
513 return("No Content");
514 else if(code == 300)
515 return("Multiple Choices");
516 else if(code == 301)
517 return("Moved Permanently");
518 else if(code == 302)
519 return("Found");
520 else if(code == 303)
521 return("See Other");
522 else if(code == 304)
523 return("Not Modified");
524 else if(code == 307)
525 return("Moved Temporarily");
526 else if(code == 400)
527 return("Bad Request");
528 else if(code == 401)
529 return("Unauthorized");
530 else if(code == 403)
531 return("Forbidden");
532 else if(code == 404)
533 return("Not Found");
534 else if(code == 500)
535 return("Internal Server Error");
536 else if(code == 501)
537 return("Not Implemented");
538 else if(code == 503)
539 return("Service Unavailable");
540 else
541 return("Unknown status");
542}
543
544static struct hthead *parseresp(FILE *in)
545{
546 struct hthead *resp;
547 char *st, *p;
548
549 omalloc(resp);
550 resp->ver = sstrdup("HTTP/1.1");
551 if(parseheaders(resp, in)) {
552 freehthead(resp);
553 return(NULL);
554 }
555 if((st = getheader(resp, "Status")) != NULL) {
556 if((p = strchr(st, ' ')) != NULL) {
557 *(p++) = 0;
558 resp->code = atoi(st);
559 resp->msg = sstrdup(p);
560 } else {
561 resp->code = atoi(st);
562 resp->msg = sstrdup(defstatus(resp->code));
563 }
564 headrmheader(resp, "Status");
565 } else if(getheader(resp, "Location")) {
566 resp->code = 303;
567 resp->msg = sstrdup("See Other");
568 } else {
569 resp->code = 200;
570 resp->msg = sstrdup("OK");
571 }
572 return(resp);
573}
574
575#define fputc2(b, f) if(fputc((b), (f)) == EOF) return(-1);
576
577static int sendrec(FILE *out, int type, int rid, char *data, size_t dlen)
578{
579 off_t off;
580 size_t cl;
581 int p;
582
583 off = 0;
584 do {
585 cl = min(dlen - off, 65535);
586 p = (8 - (cl % 8)) % 8;
587 fputc2(1, out);
588 fputc2(type, out);
589 fputc2((rid & 0xff00) >> 8, out);
590 fputc2(rid & 0x00ff, out);
591 fputc2((cl & 0xff00) >> 8, out);
592 fputc2(cl & 0x00ff, out);
593 fputc2(p, out);
594 fputc2(0, out);
595 if(fwrite(data + off, 1, cl, out) != cl)
596 return(-1);
597 for(; p > 0; p--)
598 fputc2(0, out);
599 } while((off += cl) < dlen);
600 return(0);
601}
602
603#define fgetc2(f) ({int __c__ = fgetc(f); if(__c__ == EOF) return(-1); __c__;})
604
605static int recvrec(FILE *in, int *type, int *rid, char **data, size_t *dlen)
606{
607 int b1, b2, pl;
608
609 if(fgetc2(in) != 1)
610 return(-1);
611 *type = fgetc2(in);
612 b1 = fgetc2(in);
613 b2 = fgetc2(in);
614 *rid = (b1 << 8) | b2;
615 b1 = fgetc2(in);
616 b2 = fgetc2(in);
617 *dlen = (b1 << 8) | b2;
618 pl = fgetc2(in);
619 if(fgetc2(in) != 0)
620 return(-1);
621 *data = smalloc(max(*dlen, 1));
622 if(fread(*data, 1, *dlen, in) != *dlen) {
623 free(*data);
624 return(-1);
625 }
626 for(; pl > 0; pl--) {
627 if(fgetc(in) == EOF) {
628 free(*data);
629 return(-1);
630 }
631 }
632 return(0);
633}
634
635static int begreq(FILE *out, int rid)
636{
637 char rec[] = {0, 1, 0, 0, 0, 0, 0, 0};
638
639 return(sendrec(out, FCGI_BEGIN_REQUEST, rid, rec, 8));
640}
641
642static void mtiopipe(FILE **read, FILE **write)
643{
644 int fds[2];
645
646 pipe(fds);
647 *read = mtstdopen(fds[0], 0, 600, "r");
648 *write = mtstdopen(fds[1], 0, 600, "w");
649}
650
651static void outplex(struct muth *muth, va_list args)
652{
653 vavar(FILE *, sk);
654 struct {
655 struct ch {
656 FILE *s;
657 int id;
658 } *b;
659 size_t s, d;
660 } outs;
661 int i;
662 struct ch ch;
663 int type, rid;
664 char *data;
665 size_t dlen;
666
667 bufinit(outs);
668 while((ch.s = va_arg(args, FILE *)) != NULL) {
669 ch.id = va_arg(args, int);
670 bufadd(outs, ch);
671 }
672 data = NULL;
673 while(1) {
674 if(recvrec(sk, &type, &rid, &data, &dlen))
675 goto out;
676 if(rid != 1)
677 goto out;
678 for(i = 0; i < outs.d; i++) {
679 if(outs.b[i].id == type) {
680 if(outs.b[i].s != NULL) {
681 if(dlen == 0) {
682 fclose(outs.b[i].s);
683 outs.b[i].s = NULL;
684 } else {
685 if(fwrite(data, 1, dlen, outs.b[i].s) != dlen)
686 goto out;
687 }
688 }
689 break;
690 }
691 }
692 free(data);
693 data = NULL;
694 }
695
696out:
697 if(data != NULL)
698 free(data);
699 for(i = 0; i < outs.d; i++) {
700 if(outs.b[i].s != NULL)
701 fclose(outs.b[i].s);
702 }
703 buffree(outs);
704 fclose(sk);
705}
706
707static void errhandler(struct muth *muth, va_list args)
708{
709 vavar(FILE *, in);
710 char buf[1024];
711 char *p;
712
713 bufinit(buf);
714 while(fgets(buf, sizeof(buf), in) != NULL) {
715 p = buf + strlen(buf) - 1;
716 while((p >= buf) && (*p == '\n'))
717 *(p--) = 0;
718 if(buf[0])
719 flog(LOG_INFO, "child said: %s", buf);
720 }
721 fclose(in);
722}
723
724static void serve(struct muth *muth, va_list args)
725{
726 vavar(struct hthead *, req);
727 vavar(int, fd);
728 vavar(int, sfd);
729 FILE *is, *os, *outi, *outo, *erri, *erro;
730 struct charbuf head;
731 struct hthead *resp;
732 size_t read;
733 char buf[8192];
734
735 sfd = reconn();
736 is = mtstdopen(fd, 1, 60, "r+");
737 os = mtstdopen(sfd, 1, 600, "r+");
738
739 outi = NULL;
740 mtiopipe(&outi, &outo); mtiopipe(&erri, &erro);
741 mustart(outplex, mtstdopen(dup(sfd), 1, 600, "r+"), outo, FCGI_STDOUT, erro, FCGI_STDERR, NULL);
742 mustart(errhandler, erri);
743
744 if(begreq(os, 1))
745 goto out;
746 bufinit(head);
747 mkcgienv(req, &head);
748 if(sendrec(os, FCGI_PARAMS, 1, head.b, head.d))
749 goto out;
750 if(sendrec(os, FCGI_PARAMS, 1, NULL, 0))
751 goto out;
752 buffree(head);
753 if(fflush(os))
754 goto out;
755
756 while(!feof(is)) {
757 read = fread(buf, 1, sizeof(buf), is);
758 if(ferror(is))
759 goto out;
760 if(sendrec(os, FCGI_STDIN, 1, buf, read))
761 goto out;
762 }
763 if(sendrec(os, FCGI_STDIN, 1, NULL, 0))
764 goto out;
765 if(fflush(os))
766 goto out;
767
768 if((resp = parseresp(outi)) == NULL)
769 goto out;
770 writeresp(is, resp);
771 freehthead(resp);
772 fputc('\n', is);
773 if(passdata(outi, is) < 0)
774 goto out;
775
776out:
777 freehthead(req);
778 buffree(head);
779 shutdown(sfd, SHUT_RDWR);
780 if(outi != NULL)
781 fclose(outi);
782 fclose(is);
783 fclose(os);
784}
785
786static void listenloop(struct muth *muth, va_list args)
787{
788 vavar(int, lfd);
789 int fd;
790 struct hthead *req;
791
792 while(1) {
793 block(0, EV_READ, 0);
794 if((fd = recvreq(lfd, &req)) < 0) {
795 if(errno != 0)
796 flog(LOG_ERR, "recvreq: %s", strerror(errno));
797 break;
798 }
799 mustart(serve, req, fd);
800 }
801}
802
803static void sigign(int sig)
804{
805}
806
807static void sigexit(int sig)
808{
809 exit(0);
810}
811
812static void usage(FILE *out)
813{
814 fprintf(out, "usage: callfcgi [-h] [-N RETRIES] [-i ID] [-u UNIX-PATH] [-t [HOST:]TCP-PORT] [PROGRAM [ARGS...]]\n");
815}
816
817int main(int argc, char **argv)
818{
819 int c;
820
821 while((c = getopt(argc, argv, "+hN:i:u:t:")) >= 0) {
822 switch(c) {
823 case 'h':
824 usage(stdout);
825 exit(0);
826 case 'N':
827 nolisten = atoi(optarg);
828 break;
829 case 'i':
830 sockid = optarg;
831 break;
832 case 'u':
833 unspec = optarg;
834 break;
835 case 't':
836 inspec = optarg;
837 break;
838 default:
839 usage(stderr);
840 exit(1);
841 }
842 }
843 progspec = argv + optind;
844 if(((sockid != NULL) + (unspec != NULL) + (inspec != NULL)) > 1) {
845 flog(LOG_ERR, "callfcgi: at most one of -i, -u or -t may be given");
846 exit(1);
847 }
848 signal(SIGCHLD, SIG_IGN);
849 signal(SIGPIPE, sigign);
850 signal(SIGINT, sigexit);
851 signal(SIGTERM, sigexit);
852 mustart(listenloop, 0);
853 atexit(killcuraddr);
854 ioloop();
855 return(0);
856}