Commit | Line | Data |
---|---|---|
f89ce57a FT |
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: All the various ways to start a child process makes this | |
21 | * program quite ugly at the moment. It is unclear whether it is | |
22 | * meaningfully possible to unify them better than they currently are. | |
23 | */ | |
24 | ||
25 | #include <stdlib.h> | |
26 | #include <stdio.h> | |
27 | #include <unistd.h> | |
28 | #include <string.h> | |
29 | #include <fcntl.h> | |
30 | #include <ctype.h> | |
31 | #include <sys/socket.h> | |
32 | #include <sys/un.h> | |
33 | #include <netinet/in.h> | |
34 | #include <netdb.h> | |
35 | #include <sys/signal.h> | |
36 | #include <errno.h> | |
37 | ||
38 | #ifdef HAVE_CONFIG_H | |
39 | #include <config.h> | |
40 | #endif | |
41 | #include <utils.h> | |
42 | #include <req.h> | |
43 | #include <log.h> | |
44 | #include <mt.h> | |
45 | #include <mtio.h> | |
46 | ||
47 | static char **progspec; | |
48 | static char *sockid, *unspec, *inspec; | |
49 | static int nolisten; | |
50 | static struct sockaddr *curaddr; | |
51 | static size_t caddrlen; | |
52 | static int cafamily, isanon; | |
53 | static pid_t child; | |
54 | ||
55 | static struct addrinfo *resolv(int flags) | |
56 | { | |
57 | int ret; | |
58 | struct addrinfo *ai, h; | |
59 | char *name, *srv, *p; | |
60 | ||
61 | if((p = strchr(inspec, ':')) != NULL) { | |
62 | name = smalloc(p - inspec + 1); | |
63 | memcpy(name, inspec, p - inspec); | |
64 | name[p - inspec] = 0; | |
65 | srv = p + 1; | |
66 | } else { | |
67 | name = sstrdup("localhost"); | |
68 | srv = inspec; | |
69 | } | |
70 | memset(&h, 0, sizeof(h)); | |
71 | h.ai_family = AF_UNSPEC; | |
72 | h.ai_socktype = SOCK_STREAM; | |
73 | h.ai_flags = flags; | |
74 | ret = getaddrinfo(name, srv, &h, &ai); | |
75 | free(name); | |
76 | if(ret != 0) { | |
77 | flog(LOG_ERR, "could not resolve TCP specification `%s': %s", inspec, gai_strerror(ret)); | |
78 | exit(1); | |
79 | } | |
80 | return(ai); | |
81 | } | |
82 | ||
83 | static char *mksockid(char *sockid) | |
84 | { | |
85 | char *home; | |
86 | ||
87 | home = getenv("HOME"); | |
88 | if(home && !access(sprintf3("%s/.ashd/sockets/", home), X_OK)) | |
89 | return(sprintf3("%s/.ashd/sockets/scgi-p-%s", home, sockid)); | |
90 | return(sprintf3("/tmp/scgi-%i-%s", getuid(), sockid)); | |
91 | } | |
92 | ||
93 | static char *mkanonid(void) | |
94 | { | |
95 | char *home; | |
96 | char *tmpl; | |
97 | int fd; | |
98 | ||
99 | home = getenv("HOME"); | |
100 | if(home && !access(sprintf3("%s/.ashd/sockets/", home), X_OK)) | |
101 | tmpl = sprintf2("%s/.ashd/sockets/scgi-a-XXXXXX"); | |
102 | else | |
103 | tmpl = sprintf2("/tmp/scgi-a-%i-XXXXXX", getuid()); | |
104 | if((fd = mkstemp(tmpl)) < 0) { | |
105 | flog(LOG_ERR, "could not create anonymous socket `%s': %s", tmpl, strerror(errno)); | |
106 | exit(1); | |
107 | } | |
108 | unlink(tmpl); | |
109 | return(tmpl); | |
110 | } | |
111 | ||
112 | static void startlisten(void) | |
113 | { | |
114 | int i, fd; | |
115 | struct addrinfo *ai, *cai; | |
116 | char *unpath; | |
117 | struct sockaddr_un unm; | |
118 | char *aname; | |
119 | ||
120 | isanon = 0; | |
121 | if(inspec != NULL) { | |
122 | fd = -1; | |
123 | for(cai = ai = resolv(AI_PASSIVE); cai != NULL; cai = cai->ai_next) { | |
124 | if((fd = socket(cai->ai_family, cai->ai_socktype, cai->ai_protocol)) < 0) | |
125 | continue; | |
126 | if(bind(fd, cai->ai_addr, cai->ai_addrlen)) { | |
127 | close(fd); | |
128 | fd = -1; | |
129 | continue; | |
130 | } | |
131 | if(listen(fd, 128)) { | |
132 | close(fd); | |
133 | fd = -1; | |
134 | continue; | |
135 | } | |
136 | break; | |
137 | } | |
138 | freeaddrinfo(ai); | |
139 | if(fd < 0) { | |
140 | flog(LOG_ERR, "could not bind to specified TCP address: %s", strerror(errno)); | |
141 | exit(1); | |
142 | } | |
143 | } else if((unspec != NULL) || (sockid != NULL)) { | |
144 | if((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { | |
145 | flog(LOG_ERR, "could not create Unix socket: %s", strerror(errno)); | |
146 | exit(1); | |
147 | } | |
148 | if(unspec != NULL) | |
149 | unpath = unspec; | |
150 | else | |
151 | unpath = mksockid(sockid); | |
152 | unlink(unpath); | |
153 | unm.sun_family = AF_UNIX; | |
154 | strcpy(unm.sun_path, unpath); | |
155 | if(bind(fd, (struct sockaddr *)&unm, sizeof(unm))) { | |
156 | flog(LOG_ERR, "could not bind Unix socket to `%s': %s", unspec, strerror(errno)); | |
157 | exit(1); | |
158 | } | |
159 | if(listen(fd, 128)) { | |
160 | flog(LOG_ERR, "listen: %s", strerror(errno)); | |
161 | exit(1); | |
162 | } | |
163 | } else { | |
164 | if((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { | |
165 | flog(LOG_ERR, "could not create Unix socket: %s", strerror(errno)); | |
166 | exit(1); | |
167 | } | |
168 | memset(&unm, 0, sizeof(unm)); | |
169 | aname = mkanonid(); | |
170 | unm.sun_family = AF_UNIX; | |
171 | strcpy(unm.sun_path, aname); | |
172 | free(aname); | |
173 | if(bind(fd, (struct sockaddr *)&unm, sizeof(unm))) { | |
174 | flog(LOG_ERR, "could not bind Unix socket to `%s': %s", unspec, strerror(errno)); | |
175 | exit(1); | |
176 | } | |
177 | if(listen(fd, 128)) { | |
178 | flog(LOG_ERR, "listen: %s", strerror(errno)); | |
179 | exit(1); | |
180 | } | |
181 | ||
182 | curaddr = smalloc(caddrlen = sizeof(unm)); | |
183 | memcpy(curaddr, &unm, sizeof(unm)); | |
184 | cafamily = AF_UNIX; | |
185 | isanon = 1; | |
186 | } | |
187 | if((child = fork()) < 0) { | |
188 | flog(LOG_ERR, "could not fork: %s", strerror(errno)); | |
189 | exit(1); | |
190 | } | |
191 | if(child == 0) { | |
192 | dup2(fd, 0); | |
193 | for(i = 3; i < FD_SETSIZE; i++) | |
194 | close(i); | |
195 | execvp(*progspec, progspec); | |
196 | exit(127); | |
197 | } | |
198 | close(fd); | |
199 | } | |
200 | ||
201 | static void startnolisten(void) | |
202 | { | |
02cb2a3d | 203 | int i, fd; |
f89ce57a FT |
204 | |
205 | if((child = fork()) < 0) { | |
206 | flog(LOG_ERR, "could not fork: %s", strerror(errno)); | |
207 | exit(1); | |
208 | } | |
209 | if(child == 0) { | |
210 | for(i = 3; i < FD_SETSIZE; i++) | |
211 | close(i); | |
02cb2a3d FT |
212 | if((fd = open("/dev/null", O_RDONLY)) < 0) { |
213 | flog(LOG_ERR, "/dev/null: %s", strerror(errno)); | |
214 | exit(127); | |
215 | } | |
216 | dup2(fd, 0); | |
217 | close(fd); | |
f89ce57a FT |
218 | execvp(*progspec, progspec); |
219 | exit(127); | |
220 | } | |
221 | } | |
222 | ||
223 | static int sconnect(void) | |
224 | { | |
225 | int fd; | |
226 | int err; | |
227 | socklen_t errlen; | |
228 | ||
229 | fd = socket(cafamily, SOCK_STREAM, 0); | |
230 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); | |
231 | while(1) { | |
232 | if(connect(fd, curaddr, caddrlen)) { | |
233 | if(errno == EINPROGRESS) { | |
234 | block(fd, EV_WRITE, 30); | |
235 | errlen = sizeof(err); | |
236 | if(getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &errlen) || ((errno = err) != 0)) { | |
237 | close(fd); | |
238 | return(-1); | |
239 | } | |
240 | return(fd); | |
241 | } | |
242 | close(fd); | |
243 | return(-1); | |
244 | } | |
245 | return(fd); | |
246 | } | |
247 | } | |
248 | ||
249 | static int econnect(void) | |
250 | { | |
251 | int fd; | |
252 | struct addrinfo *ai, *cai; | |
253 | int tries; | |
254 | char *unpath; | |
255 | struct sockaddr_un unm; | |
256 | ||
257 | tries = 0; | |
258 | retry: | |
259 | if(inspec != NULL) { | |
260 | fd = -1; | |
261 | for(cai = ai = resolv(0); cai != NULL; cai = cai->ai_next) { | |
262 | if((fd = socket(cai->ai_family, cai->ai_socktype, cai->ai_protocol)) < 0) | |
263 | continue; | |
264 | if(connect(fd, cai->ai_addr, cai->ai_addrlen)) { | |
265 | close(fd); | |
266 | fd = -1; | |
267 | continue; | |
268 | } | |
269 | break; | |
270 | } | |
f89ce57a | 271 | if(fd < 0) { |
02cb2a3d FT |
272 | if(tries++ < nolisten) { |
273 | sleep(1); | |
274 | goto retry; | |
275 | } | |
f89ce57a FT |
276 | flog(LOG_ERR, "could not connect to specified TCP address: %s", strerror(errno)); |
277 | exit(1); | |
278 | } | |
279 | curaddr = smalloc(caddrlen = cai->ai_addrlen); | |
280 | memcpy(curaddr, cai->ai_addr, caddrlen); | |
281 | cafamily = cai->ai_family; | |
282 | isanon = 0; | |
283 | freeaddrinfo(ai); | |
284 | return(fd); | |
285 | } else if((unspec != NULL) || (sockid != NULL)) { | |
286 | if((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { | |
287 | flog(LOG_ERR, "could not create Unix socket: %s", strerror(errno)); | |
288 | exit(1); | |
289 | } | |
290 | if(unspec != NULL) | |
291 | unpath = unspec; | |
292 | else | |
293 | unpath = mksockid(sockid); | |
294 | unlink(unpath); | |
295 | unm.sun_family = AF_UNIX; | |
296 | strcpy(unm.sun_path, unpath); | |
297 | if(connect(fd, (struct sockaddr *)&unm, sizeof(unm))) { | |
298 | close(fd); | |
299 | if(tries++ < nolisten) { | |
300 | sleep(1); | |
301 | goto retry; | |
302 | } | |
303 | flog(LOG_ERR, "could not connect to Unix socket `%s': %s", unspec, strerror(errno)); | |
304 | exit(1); | |
305 | } | |
306 | curaddr = smalloc(caddrlen = sizeof(unm)); | |
307 | memcpy(curaddr, &unm, sizeof(unm)); | |
308 | cafamily = AF_UNIX; | |
309 | isanon = 0; | |
310 | return(fd); | |
311 | } else { | |
312 | flog(LOG_ERR, "servescgi: cannot use an anonymous socket without a program to start"); | |
313 | exit(1); | |
314 | } | |
315 | } | |
316 | ||
317 | static int startconn(void) | |
318 | { | |
319 | if(*progspec) { | |
320 | if(nolisten == 0) | |
321 | startlisten(); | |
322 | else | |
323 | startnolisten(); | |
324 | } | |
325 | if(curaddr != NULL) | |
326 | return(sconnect()); | |
327 | return(econnect()); | |
328 | } | |
329 | ||
330 | static void killcuraddr(void) | |
331 | { | |
332 | if(curaddr == NULL) | |
333 | return; | |
334 | if(isanon) { | |
335 | unlink(((struct sockaddr_un *)curaddr)->sun_path); | |
336 | if(child > 0) | |
337 | kill(child, SIGTERM); | |
338 | } | |
339 | free(curaddr); | |
340 | curaddr = NULL; | |
341 | } | |
342 | ||
343 | static int reconn(void) | |
344 | { | |
345 | int fd; | |
346 | ||
347 | if(curaddr != NULL) { | |
348 | if((fd = sconnect()) >= 0) | |
349 | return(fd); | |
350 | killcuraddr(); | |
351 | } | |
352 | return(startconn()); | |
353 | } | |
354 | ||
355 | static off_t passdata(FILE *in, FILE *out) | |
356 | { | |
357 | size_t read; | |
358 | off_t total; | |
359 | char buf[8192]; | |
360 | ||
361 | total = 0; | |
362 | while(!feof(in)) { | |
363 | read = fread(buf, 1, sizeof(buf), in); | |
364 | if(ferror(in)) | |
365 | return(-1); | |
366 | if(fwrite(buf, 1, read, out) != read) | |
367 | return(-1); | |
368 | total += read; | |
369 | } | |
370 | return(total); | |
371 | } | |
372 | ||
373 | static void bufaddenv(struct charbuf *dst, char *name, char *fmt, ...) | |
374 | { | |
375 | va_list args; | |
376 | ||
377 | bufcatstr2(*dst, name); | |
378 | va_start(args, fmt); | |
379 | bvprintf(dst, fmt, args); | |
380 | va_end(args); | |
381 | bufadd(*dst, 0); | |
382 | } | |
383 | ||
384 | static char *absolutify(char *file) | |
385 | { | |
386 | static int inited = 0; | |
387 | static char cwd[1024]; | |
388 | ||
389 | if(*file != '/') { | |
390 | if(!inited) { | |
391 | getcwd(cwd, sizeof(cwd)); | |
392 | inited = 1; | |
393 | } | |
394 | return(sprintf2("%s/%s", cwd, file)); | |
395 | } | |
396 | return(sstrdup(file)); | |
397 | } | |
398 | ||
399 | /* Mostly copied from callcgi. */ | |
400 | static void mkcgienv(struct hthead *req, struct charbuf *dst) | |
401 | { | |
402 | int i; | |
403 | char *url, *qp, *h, *p; | |
404 | ||
405 | bufaddenv(dst, "SERVER_SOFTWARE", "ashd/%s", VERSION); | |
406 | bufaddenv(dst, "GATEWAY_INTERFACE", "CGI/1.1"); | |
407 | bufaddenv(dst, "SCGI", "1"); | |
408 | bufaddenv(dst, "SERVER_PROTOCOL", "%s", req->ver); | |
409 | bufaddenv(dst, "REQUEST_METHOD", "%s", req->method); | |
410 | bufaddenv(dst, "REQUEST_URI", "%s", req->url); | |
411 | if(*req->rest) | |
412 | bufaddenv(dst, "PATH_INFO", "/%s", req->rest); | |
413 | else | |
414 | bufaddenv(dst, "PATH_INFO", ""); | |
415 | url = sstrdup(req->url); | |
416 | if((qp = strchr(url, '?')) != NULL) | |
417 | *(qp++) = 0; | |
418 | /* XXX: This is an ugly hack (I think), but though I can think of | |
419 | * several alternatives, none seem to be better. */ | |
420 | if(*req->rest && (strlen(url) > strlen(req->rest)) && | |
421 | !strcmp(req->rest, url + strlen(url) - strlen(req->rest)) && | |
422 | (url[strlen(url) - strlen(req->rest) - 1] == '/')) { | |
423 | bufaddenv(dst, "SCRIPT_NAME", "%.*s", (int)(strlen(url) - strlen(req->rest) - 1), url); | |
424 | } else { | |
425 | bufaddenv(dst, "SCRIPT_NAME", "%s", url); | |
426 | } | |
427 | bufaddenv(dst, "QUERY_STRING", "%s", qp?qp:""); | |
428 | if((h = getheader(req, "Host")) != NULL) | |
429 | bufaddenv(dst, "SERVER_NAME", "%s", h); | |
430 | if((h = getheader(req, "X-Ash-Server-Port")) != NULL) | |
431 | bufaddenv(dst, "SERVER_PORT", "%s", h); | |
432 | if(((h = getheader(req, "X-Ash-Server-Protocol")) != NULL) && !strcmp(h, "https")) | |
433 | bufaddenv(dst, "HTTPS", "on"); | |
434 | if((h = getheader(req, "X-Ash-Address")) != NULL) | |
435 | bufaddenv(dst, "REMOTE_ADDR", "%s", h); | |
436 | if((h = getheader(req, "Content-Type")) != NULL) | |
437 | bufaddenv(dst, "CONTENT_TYPE", "%s", h); | |
438 | if((h = getheader(req, "Content-Length")) != NULL) | |
439 | bufaddenv(dst, "CONTENT_LENGTH", "%s", h); | |
440 | else | |
441 | bufaddenv(dst, "CONTENT_LENGTH", "0"); | |
442 | if((h = getheader(req, "X-Ash-File")) != NULL) | |
443 | bufaddenv(dst, "SCRIPT_FILENAME", "%s", absolutify(h)); | |
444 | for(i = 0; i < req->noheaders; i++) { | |
02cb2a3d | 445 | h = sprintf2("HTTP_%s", req->headers[i][0]); |
f89ce57a FT |
446 | for(p = h; *p; p++) { |
447 | if(isalnum(*p)) | |
448 | *p = toupper(*p); | |
449 | else | |
450 | *p = '_'; | |
451 | } | |
452 | bufcatstr2(*dst, h); | |
453 | free(h); | |
454 | bufcatstr2(*dst, req->headers[i][1]); | |
455 | } | |
456 | } | |
457 | ||
458 | static char *defstatus(int code) | |
459 | { | |
460 | if(code == 200) | |
461 | return("OK"); | |
462 | else if(code == 201) | |
463 | return("Created"); | |
464 | else if(code == 202) | |
465 | return("Accepted"); | |
466 | else if(code == 204) | |
467 | return("No Content"); | |
468 | else if(code == 300) | |
469 | return("Multiple Choices"); | |
470 | else if(code == 301) | |
471 | return("Moved Permanently"); | |
472 | else if(code == 302) | |
473 | return("Found"); | |
474 | else if(code == 303) | |
475 | return("See Other"); | |
476 | else if(code == 304) | |
477 | return("Not Modified"); | |
478 | else if(code == 307) | |
479 | return("Moved Temporarily"); | |
480 | else if(code == 400) | |
481 | return("Bad Request"); | |
482 | else if(code == 401) | |
483 | return("Unauthorized"); | |
484 | else if(code == 403) | |
485 | return("Forbidden"); | |
486 | else if(code == 404) | |
487 | return("Not Found"); | |
488 | else if(code == 500) | |
489 | return("Internal Server Error"); | |
490 | else if(code == 501) | |
491 | return("Not Implemented"); | |
492 | else if(code == 503) | |
493 | return("Service Unavailable"); | |
494 | else | |
495 | return("Unknown status"); | |
496 | } | |
497 | ||
498 | static struct hthead *parseresp(FILE *in) | |
499 | { | |
500 | struct hthead *resp; | |
501 | char *st, *p; | |
502 | ||
503 | omalloc(resp); | |
504 | resp->ver = sstrdup("HTTP/1.1"); | |
505 | if(parseheaders(resp, in)) { | |
506 | freehthead(resp); | |
507 | return(NULL); | |
508 | } | |
509 | if((st = getheader(resp, "Status")) != NULL) { | |
510 | if((p = strchr(st, ' ')) != NULL) { | |
511 | *(p++) = 0; | |
512 | resp->code = atoi(st); | |
513 | resp->msg = sstrdup(p); | |
514 | } else { | |
515 | resp->code = atoi(st); | |
516 | resp->msg = sstrdup(defstatus(resp->code)); | |
517 | } | |
518 | headrmheader(resp, "Status"); | |
519 | } else if(getheader(resp, "Location")) { | |
520 | resp->code = 303; | |
521 | resp->msg = sstrdup("See Other"); | |
522 | } else { | |
523 | resp->code = 200; | |
524 | resp->msg = sstrdup("OK"); | |
525 | } | |
526 | return(resp); | |
527 | } | |
528 | ||
529 | static void serve(struct muth *muth, va_list args) | |
530 | { | |
531 | vavar(struct hthead *, req); | |
532 | vavar(int, fd); | |
533 | vavar(int, sfd); | |
534 | FILE *is, *os; | |
535 | struct charbuf head; | |
536 | struct hthead *resp; | |
537 | ||
538 | sfd = reconn(); | |
539 | is = mtstdopen(fd, 1, 60, "r+"); | |
540 | os = mtstdopen(sfd, 1, 600, "r+"); | |
541 | ||
542 | bufinit(head); | |
543 | mkcgienv(req, &head); | |
544 | fprintf(os, "%zi:", head.d); | |
545 | fwrite(head.b, head.d, 1, os); | |
546 | fputc(',', os); | |
547 | buffree(head); | |
548 | if(passdata(is, os) < 0) | |
549 | goto out; | |
550 | ||
551 | if((resp = parseresp(os)) == NULL) | |
552 | goto out; | |
553 | writeresp(is, resp); | |
554 | freehthead(resp); | |
555 | fputc('\n', is); | |
556 | if(passdata(os, is) < 0) | |
557 | goto out; | |
558 | ||
559 | out: | |
560 | freehthead(req); | |
561 | fclose(is); | |
562 | fclose(os); | |
563 | } | |
564 | ||
565 | static void listenloop(struct muth *muth, va_list args) | |
566 | { | |
567 | vavar(int, lfd); | |
568 | int fd; | |
569 | struct hthead *req; | |
570 | ||
571 | while(1) { | |
572 | block(0, EV_READ, 0); | |
573 | if((fd = recvreq(lfd, &req)) < 0) { | |
574 | if(errno != 0) | |
575 | flog(LOG_ERR, "recvreq: %s", strerror(errno)); | |
576 | break; | |
577 | } | |
578 | mustart(serve, req, fd); | |
579 | } | |
580 | } | |
581 | ||
582 | static void usage(FILE *out) | |
583 | { | |
584 | fprintf(out, "usage: servescgi [-h] [-N RETRIES] [-i ID] [-u UNIX-PATH] [-t [HOST:]TCP-PORT] [PROGRAM [ARGS...]]\n"); | |
585 | } | |
586 | ||
587 | int main(int argc, char **argv) | |
588 | { | |
589 | int c; | |
590 | ||
591 | while((c = getopt(argc, argv, "+hN:i:u:t:")) >= 0) { | |
592 | switch(c) { | |
593 | case 'h': | |
594 | usage(stdout); | |
595 | exit(0); | |
596 | case 'N': | |
597 | nolisten = atoi(optarg); | |
598 | break; | |
599 | case 'i': | |
600 | sockid = optarg; | |
601 | break; | |
602 | case 'u': | |
603 | unspec = optarg; | |
604 | break; | |
605 | case 't': | |
606 | inspec = optarg; | |
607 | break; | |
608 | default: | |
609 | usage(stderr); | |
610 | exit(1); | |
611 | } | |
612 | } | |
613 | progspec = argv + optind; | |
614 | if(((sockid != NULL) + (unspec != NULL) + (inspec != NULL)) > 1) { | |
615 | flog(LOG_ERR, "servescgi: at most one of -i, -u or -t may be given"); | |
616 | exit(1); | |
617 | } | |
618 | signal(SIGCHLD, SIG_IGN); | |
619 | mustart(listenloop, 0); | |
620 | atexit(killcuraddr); | |
621 | ioloop(); | |
622 | return(0); | |
623 | } |