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