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)) | |
1376c0cd | 101 | tmpl = sprintf2("%s/.ashd/sockets/scgi-a-XXXXXX", home); |
f89ce57a FT |
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 | } | |
1376c0cd | 108 | close(fd); |
f89ce57a FT |
109 | unlink(tmpl); |
110 | return(tmpl); | |
111 | } | |
112 | ||
113 | static void startlisten(void) | |
114 | { | |
115 | int i, fd; | |
116 | struct addrinfo *ai, *cai; | |
117 | char *unpath; | |
118 | struct sockaddr_un unm; | |
119 | char *aname; | |
120 | ||
121 | isanon = 0; | |
122 | if(inspec != NULL) { | |
123 | fd = -1; | |
124 | for(cai = ai = resolv(AI_PASSIVE); cai != NULL; cai = cai->ai_next) { | |
125 | if((fd = socket(cai->ai_family, cai->ai_socktype, cai->ai_protocol)) < 0) | |
126 | continue; | |
127 | if(bind(fd, cai->ai_addr, cai->ai_addrlen)) { | |
128 | close(fd); | |
129 | fd = -1; | |
130 | continue; | |
131 | } | |
132 | if(listen(fd, 128)) { | |
133 | close(fd); | |
134 | fd = -1; | |
135 | continue; | |
136 | } | |
137 | break; | |
138 | } | |
139 | freeaddrinfo(ai); | |
140 | if(fd < 0) { | |
141 | flog(LOG_ERR, "could not bind to specified TCP address: %s", strerror(errno)); | |
142 | exit(1); | |
143 | } | |
144 | } else if((unspec != NULL) || (sockid != NULL)) { | |
145 | if((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { | |
146 | flog(LOG_ERR, "could not create Unix socket: %s", strerror(errno)); | |
147 | exit(1); | |
148 | } | |
149 | if(unspec != NULL) | |
150 | unpath = unspec; | |
151 | else | |
152 | unpath = mksockid(sockid); | |
153 | unlink(unpath); | |
154 | unm.sun_family = AF_UNIX; | |
155 | strcpy(unm.sun_path, unpath); | |
156 | if(bind(fd, (struct sockaddr *)&unm, sizeof(unm))) { | |
157 | flog(LOG_ERR, "could not bind Unix socket to `%s': %s", unspec, strerror(errno)); | |
158 | exit(1); | |
159 | } | |
160 | if(listen(fd, 128)) { | |
161 | flog(LOG_ERR, "listen: %s", strerror(errno)); | |
162 | exit(1); | |
163 | } | |
164 | } else { | |
165 | if((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { | |
166 | flog(LOG_ERR, "could not create Unix socket: %s", strerror(errno)); | |
167 | exit(1); | |
168 | } | |
169 | memset(&unm, 0, sizeof(unm)); | |
170 | aname = mkanonid(); | |
171 | unm.sun_family = AF_UNIX; | |
172 | strcpy(unm.sun_path, aname); | |
173 | free(aname); | |
174 | if(bind(fd, (struct sockaddr *)&unm, sizeof(unm))) { | |
175 | flog(LOG_ERR, "could not bind Unix socket to `%s': %s", unspec, strerror(errno)); | |
176 | exit(1); | |
177 | } | |
178 | if(listen(fd, 128)) { | |
179 | flog(LOG_ERR, "listen: %s", strerror(errno)); | |
180 | exit(1); | |
181 | } | |
182 | ||
183 | curaddr = smalloc(caddrlen = sizeof(unm)); | |
184 | memcpy(curaddr, &unm, sizeof(unm)); | |
185 | cafamily = AF_UNIX; | |
186 | isanon = 1; | |
187 | } | |
188 | if((child = fork()) < 0) { | |
189 | flog(LOG_ERR, "could not fork: %s", strerror(errno)); | |
190 | exit(1); | |
191 | } | |
192 | if(child == 0) { | |
193 | dup2(fd, 0); | |
194 | for(i = 3; i < FD_SETSIZE; i++) | |
195 | close(i); | |
196 | execvp(*progspec, progspec); | |
197 | exit(127); | |
198 | } | |
199 | close(fd); | |
200 | } | |
201 | ||
202 | static void startnolisten(void) | |
203 | { | |
02cb2a3d | 204 | int i, fd; |
f89ce57a FT |
205 | |
206 | if((child = fork()) < 0) { | |
207 | flog(LOG_ERR, "could not fork: %s", strerror(errno)); | |
208 | exit(1); | |
209 | } | |
210 | if(child == 0) { | |
211 | for(i = 3; i < FD_SETSIZE; i++) | |
212 | close(i); | |
02cb2a3d FT |
213 | if((fd = open("/dev/null", O_RDONLY)) < 0) { |
214 | flog(LOG_ERR, "/dev/null: %s", strerror(errno)); | |
215 | exit(127); | |
216 | } | |
217 | dup2(fd, 0); | |
218 | close(fd); | |
f89ce57a FT |
219 | execvp(*progspec, progspec); |
220 | exit(127); | |
221 | } | |
222 | } | |
223 | ||
224 | static int sconnect(void) | |
225 | { | |
226 | int fd; | |
227 | int err; | |
228 | socklen_t errlen; | |
229 | ||
230 | fd = socket(cafamily, SOCK_STREAM, 0); | |
231 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); | |
232 | while(1) { | |
233 | if(connect(fd, curaddr, caddrlen)) { | |
234 | if(errno == EINPROGRESS) { | |
235 | block(fd, EV_WRITE, 30); | |
236 | errlen = sizeof(err); | |
237 | if(getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &errlen) || ((errno = err) != 0)) { | |
238 | close(fd); | |
239 | return(-1); | |
240 | } | |
241 | return(fd); | |
242 | } | |
243 | close(fd); | |
244 | return(-1); | |
245 | } | |
246 | return(fd); | |
247 | } | |
248 | } | |
249 | ||
250 | static int econnect(void) | |
251 | { | |
252 | int fd; | |
253 | struct addrinfo *ai, *cai; | |
254 | int tries; | |
255 | char *unpath; | |
256 | struct sockaddr_un unm; | |
257 | ||
258 | tries = 0; | |
259 | retry: | |
260 | if(inspec != NULL) { | |
261 | fd = -1; | |
262 | for(cai = ai = resolv(0); cai != NULL; cai = cai->ai_next) { | |
263 | if((fd = socket(cai->ai_family, cai->ai_socktype, cai->ai_protocol)) < 0) | |
264 | continue; | |
265 | if(connect(fd, cai->ai_addr, cai->ai_addrlen)) { | |
266 | close(fd); | |
267 | fd = -1; | |
268 | continue; | |
269 | } | |
270 | break; | |
271 | } | |
f89ce57a | 272 | if(fd < 0) { |
02cb2a3d FT |
273 | if(tries++ < nolisten) { |
274 | sleep(1); | |
275 | goto retry; | |
276 | } | |
f89ce57a FT |
277 | flog(LOG_ERR, "could not connect to specified TCP address: %s", strerror(errno)); |
278 | exit(1); | |
279 | } | |
280 | curaddr = smalloc(caddrlen = cai->ai_addrlen); | |
281 | memcpy(curaddr, cai->ai_addr, caddrlen); | |
282 | cafamily = cai->ai_family; | |
283 | isanon = 0; | |
284 | freeaddrinfo(ai); | |
285 | return(fd); | |
286 | } else if((unspec != NULL) || (sockid != NULL)) { | |
287 | if((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { | |
288 | flog(LOG_ERR, "could not create Unix socket: %s", strerror(errno)); | |
289 | exit(1); | |
290 | } | |
291 | if(unspec != NULL) | |
292 | unpath = unspec; | |
293 | else | |
294 | unpath = mksockid(sockid); | |
295 | unlink(unpath); | |
296 | unm.sun_family = AF_UNIX; | |
297 | strcpy(unm.sun_path, unpath); | |
298 | if(connect(fd, (struct sockaddr *)&unm, sizeof(unm))) { | |
299 | close(fd); | |
300 | if(tries++ < nolisten) { | |
301 | sleep(1); | |
302 | goto retry; | |
303 | } | |
304 | flog(LOG_ERR, "could not connect to Unix socket `%s': %s", unspec, strerror(errno)); | |
305 | exit(1); | |
306 | } | |
307 | curaddr = smalloc(caddrlen = sizeof(unm)); | |
308 | memcpy(curaddr, &unm, sizeof(unm)); | |
309 | cafamily = AF_UNIX; | |
310 | isanon = 0; | |
311 | return(fd); | |
312 | } else { | |
313 | flog(LOG_ERR, "servescgi: cannot use an anonymous socket without a program to start"); | |
314 | exit(1); | |
315 | } | |
316 | } | |
317 | ||
318 | static int startconn(void) | |
319 | { | |
320 | if(*progspec) { | |
321 | if(nolisten == 0) | |
322 | startlisten(); | |
323 | else | |
324 | startnolisten(); | |
325 | } | |
326 | if(curaddr != NULL) | |
327 | return(sconnect()); | |
328 | return(econnect()); | |
329 | } | |
330 | ||
331 | static void killcuraddr(void) | |
332 | { | |
333 | if(curaddr == NULL) | |
334 | return; | |
335 | if(isanon) { | |
336 | unlink(((struct sockaddr_un *)curaddr)->sun_path); | |
337 | if(child > 0) | |
338 | kill(child, SIGTERM); | |
339 | } | |
340 | free(curaddr); | |
341 | curaddr = NULL; | |
342 | } | |
343 | ||
344 | static int reconn(void) | |
345 | { | |
346 | int fd; | |
347 | ||
348 | if(curaddr != NULL) { | |
349 | if((fd = sconnect()) >= 0) | |
350 | return(fd); | |
351 | killcuraddr(); | |
352 | } | |
353 | return(startconn()); | |
354 | } | |
355 | ||
356 | static off_t passdata(FILE *in, FILE *out) | |
357 | { | |
358 | size_t read; | |
359 | off_t total; | |
360 | char buf[8192]; | |
361 | ||
362 | total = 0; | |
363 | while(!feof(in)) { | |
364 | read = fread(buf, 1, sizeof(buf), in); | |
365 | if(ferror(in)) | |
366 | return(-1); | |
367 | if(fwrite(buf, 1, read, out) != read) | |
368 | return(-1); | |
369 | total += read; | |
370 | } | |
371 | return(total); | |
372 | } | |
373 | ||
374 | static void bufaddenv(struct charbuf *dst, char *name, char *fmt, ...) | |
375 | { | |
376 | va_list args; | |
377 | ||
378 | bufcatstr2(*dst, name); | |
379 | va_start(args, fmt); | |
380 | bvprintf(dst, fmt, args); | |
381 | va_end(args); | |
382 | bufadd(*dst, 0); | |
383 | } | |
384 | ||
385 | static char *absolutify(char *file) | |
386 | { | |
387 | static int inited = 0; | |
388 | static char cwd[1024]; | |
389 | ||
390 | if(*file != '/') { | |
391 | if(!inited) { | |
392 | getcwd(cwd, sizeof(cwd)); | |
393 | inited = 1; | |
394 | } | |
395 | return(sprintf2("%s/%s", cwd, file)); | |
396 | } | |
397 | return(sstrdup(file)); | |
398 | } | |
399 | ||
400 | /* Mostly copied from callcgi. */ | |
401 | static void mkcgienv(struct hthead *req, struct charbuf *dst) | |
402 | { | |
403 | int i; | |
404 | char *url, *qp, *h, *p; | |
405 | ||
406 | bufaddenv(dst, "SERVER_SOFTWARE", "ashd/%s", VERSION); | |
407 | bufaddenv(dst, "GATEWAY_INTERFACE", "CGI/1.1"); | |
408 | bufaddenv(dst, "SCGI", "1"); | |
409 | bufaddenv(dst, "SERVER_PROTOCOL", "%s", req->ver); | |
410 | bufaddenv(dst, "REQUEST_METHOD", "%s", req->method); | |
411 | bufaddenv(dst, "REQUEST_URI", "%s", req->url); | |
412 | if(*req->rest) | |
413 | bufaddenv(dst, "PATH_INFO", "/%s", req->rest); | |
414 | else | |
415 | bufaddenv(dst, "PATH_INFO", ""); | |
416 | url = sstrdup(req->url); | |
417 | if((qp = strchr(url, '?')) != NULL) | |
418 | *(qp++) = 0; | |
419 | /* XXX: This is an ugly hack (I think), but though I can think of | |
420 | * several alternatives, none seem to be better. */ | |
421 | if(*req->rest && (strlen(url) > strlen(req->rest)) && | |
422 | !strcmp(req->rest, url + strlen(url) - strlen(req->rest)) && | |
423 | (url[strlen(url) - strlen(req->rest) - 1] == '/')) { | |
424 | bufaddenv(dst, "SCRIPT_NAME", "%.*s", (int)(strlen(url) - strlen(req->rest) - 1), url); | |
425 | } else { | |
426 | bufaddenv(dst, "SCRIPT_NAME", "%s", url); | |
427 | } | |
428 | bufaddenv(dst, "QUERY_STRING", "%s", qp?qp:""); | |
429 | if((h = getheader(req, "Host")) != NULL) | |
430 | bufaddenv(dst, "SERVER_NAME", "%s", h); | |
431 | if((h = getheader(req, "X-Ash-Server-Port")) != NULL) | |
432 | bufaddenv(dst, "SERVER_PORT", "%s", h); | |
433 | if(((h = getheader(req, "X-Ash-Server-Protocol")) != NULL) && !strcmp(h, "https")) | |
434 | bufaddenv(dst, "HTTPS", "on"); | |
435 | if((h = getheader(req, "X-Ash-Address")) != NULL) | |
436 | bufaddenv(dst, "REMOTE_ADDR", "%s", h); | |
437 | if((h = getheader(req, "Content-Type")) != NULL) | |
438 | bufaddenv(dst, "CONTENT_TYPE", "%s", h); | |
439 | if((h = getheader(req, "Content-Length")) != NULL) | |
440 | bufaddenv(dst, "CONTENT_LENGTH", "%s", h); | |
441 | else | |
442 | bufaddenv(dst, "CONTENT_LENGTH", "0"); | |
443 | if((h = getheader(req, "X-Ash-File")) != NULL) | |
444 | bufaddenv(dst, "SCRIPT_FILENAME", "%s", absolutify(h)); | |
445 | for(i = 0; i < req->noheaders; i++) { | |
02cb2a3d | 446 | h = sprintf2("HTTP_%s", req->headers[i][0]); |
f89ce57a FT |
447 | for(p = h; *p; p++) { |
448 | if(isalnum(*p)) | |
449 | *p = toupper(*p); | |
450 | else | |
451 | *p = '_'; | |
452 | } | |
453 | bufcatstr2(*dst, h); | |
454 | free(h); | |
455 | bufcatstr2(*dst, req->headers[i][1]); | |
456 | } | |
457 | } | |
458 | ||
459 | static char *defstatus(int code) | |
460 | { | |
461 | if(code == 200) | |
462 | return("OK"); | |
463 | else if(code == 201) | |
464 | return("Created"); | |
465 | else if(code == 202) | |
466 | return("Accepted"); | |
467 | else if(code == 204) | |
468 | return("No Content"); | |
469 | else if(code == 300) | |
470 | return("Multiple Choices"); | |
471 | else if(code == 301) | |
472 | return("Moved Permanently"); | |
473 | else if(code == 302) | |
474 | return("Found"); | |
475 | else if(code == 303) | |
476 | return("See Other"); | |
477 | else if(code == 304) | |
478 | return("Not Modified"); | |
479 | else if(code == 307) | |
480 | return("Moved Temporarily"); | |
481 | else if(code == 400) | |
482 | return("Bad Request"); | |
483 | else if(code == 401) | |
484 | return("Unauthorized"); | |
485 | else if(code == 403) | |
486 | return("Forbidden"); | |
487 | else if(code == 404) | |
488 | return("Not Found"); | |
489 | else if(code == 500) | |
490 | return("Internal Server Error"); | |
491 | else if(code == 501) | |
492 | return("Not Implemented"); | |
493 | else if(code == 503) | |
494 | return("Service Unavailable"); | |
495 | else | |
496 | return("Unknown status"); | |
497 | } | |
498 | ||
499 | static struct hthead *parseresp(FILE *in) | |
500 | { | |
501 | struct hthead *resp; | |
502 | char *st, *p; | |
503 | ||
504 | omalloc(resp); | |
505 | resp->ver = sstrdup("HTTP/1.1"); | |
506 | if(parseheaders(resp, in)) { | |
507 | freehthead(resp); | |
508 | return(NULL); | |
509 | } | |
510 | if((st = getheader(resp, "Status")) != NULL) { | |
511 | if((p = strchr(st, ' ')) != NULL) { | |
512 | *(p++) = 0; | |
513 | resp->code = atoi(st); | |
514 | resp->msg = sstrdup(p); | |
515 | } else { | |
516 | resp->code = atoi(st); | |
517 | resp->msg = sstrdup(defstatus(resp->code)); | |
518 | } | |
519 | headrmheader(resp, "Status"); | |
520 | } else if(getheader(resp, "Location")) { | |
521 | resp->code = 303; | |
522 | resp->msg = sstrdup("See Other"); | |
523 | } else { | |
524 | resp->code = 200; | |
525 | resp->msg = sstrdup("OK"); | |
526 | } | |
527 | return(resp); | |
528 | } | |
529 | ||
530 | static void serve(struct muth *muth, va_list args) | |
531 | { | |
532 | vavar(struct hthead *, req); | |
533 | vavar(int, fd); | |
534 | vavar(int, sfd); | |
535 | FILE *is, *os; | |
536 | struct charbuf head; | |
537 | struct hthead *resp; | |
538 | ||
539 | sfd = reconn(); | |
540 | is = mtstdopen(fd, 1, 60, "r+"); | |
541 | os = mtstdopen(sfd, 1, 600, "r+"); | |
542 | ||
543 | bufinit(head); | |
544 | mkcgienv(req, &head); | |
545 | fprintf(os, "%zi:", head.d); | |
546 | fwrite(head.b, head.d, 1, os); | |
547 | fputc(',', os); | |
548 | buffree(head); | |
549 | if(passdata(is, os) < 0) | |
550 | goto out; | |
551 | ||
552 | if((resp = parseresp(os)) == NULL) | |
553 | goto out; | |
554 | writeresp(is, resp); | |
555 | freehthead(resp); | |
556 | fputc('\n', is); | |
557 | if(passdata(os, is) < 0) | |
558 | goto out; | |
559 | ||
560 | out: | |
561 | freehthead(req); | |
562 | fclose(is); | |
563 | fclose(os); | |
564 | } | |
565 | ||
566 | static void listenloop(struct muth *muth, va_list args) | |
567 | { | |
568 | vavar(int, lfd); | |
569 | int fd; | |
570 | struct hthead *req; | |
571 | ||
572 | while(1) { | |
573 | block(0, EV_READ, 0); | |
574 | if((fd = recvreq(lfd, &req)) < 0) { | |
575 | if(errno != 0) | |
576 | flog(LOG_ERR, "recvreq: %s", strerror(errno)); | |
577 | break; | |
578 | } | |
579 | mustart(serve, req, fd); | |
580 | } | |
581 | } | |
582 | ||
583 | static void usage(FILE *out) | |
584 | { | |
585 | fprintf(out, "usage: servescgi [-h] [-N RETRIES] [-i ID] [-u UNIX-PATH] [-t [HOST:]TCP-PORT] [PROGRAM [ARGS...]]\n"); | |
586 | } | |
587 | ||
588 | int main(int argc, char **argv) | |
589 | { | |
590 | int c; | |
591 | ||
592 | while((c = getopt(argc, argv, "+hN:i:u:t:")) >= 0) { | |
593 | switch(c) { | |
594 | case 'h': | |
595 | usage(stdout); | |
596 | exit(0); | |
597 | case 'N': | |
598 | nolisten = atoi(optarg); | |
599 | break; | |
600 | case 'i': | |
601 | sockid = optarg; | |
602 | break; | |
603 | case 'u': | |
604 | unspec = optarg; | |
605 | break; | |
606 | case 't': | |
607 | inspec = optarg; | |
608 | break; | |
609 | default: | |
610 | usage(stderr); | |
611 | exit(1); | |
612 | } | |
613 | } | |
614 | progspec = argv + optind; | |
615 | if(((sockid != NULL) + (unspec != NULL) + (inspec != NULL)) > 1) { | |
616 | flog(LOG_ERR, "servescgi: at most one of -i, -u or -t may be given"); | |
617 | exit(1); | |
618 | } | |
619 | signal(SIGCHLD, SIG_IGN); | |
620 | mustart(listenloop, 0); | |
621 | atexit(killcuraddr); | |
622 | ioloop(); | |
623 | return(0); | |
624 | } |