Commit | Line | Data |
---|---|---|
f0bbedf7 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 | #include <stdlib.h> | |
20 | #include <unistd.h> | |
21 | #include <stdio.h> | |
d341283f | 22 | #include <fcntl.h> |
f4cdf919 | 23 | #include <string.h> |
f4cdf919 | 24 | #include <sys/socket.h> |
f0cbd8d7 | 25 | #include <pwd.h> |
15fa3fe8 | 26 | #include <sys/signal.h> |
f4cdf919 | 27 | #include <errno.h> |
f0bbedf7 FT |
28 | |
29 | #ifdef HAVE_CONFIG_H | |
30 | #include <config.h> | |
31 | #endif | |
32 | #include <utils.h> | |
f4cdf919 | 33 | #include <mt.h> |
83723896 | 34 | #include <mtio.h> |
f4cdf919 | 35 | #include <log.h> |
66987955 | 36 | #include <req.h> |
9d87a119 | 37 | #include <proc.h> |
f4cdf919 | 38 | |
8774c31b | 39 | #include "htparser.h" |
f4cdf919 | 40 | |
8774c31b | 41 | static int plex; |
43c58ba2 | 42 | static char *pidfile = NULL; |
d341283f | 43 | static int daemonize, usesyslog; |
cac13158 | 44 | struct mtbuf listeners; |
f4cdf919 | 45 | |
df431d1d FT |
46 | static void trimx(struct hthead *req) |
47 | { | |
48 | int i; | |
49 | ||
50 | i = 0; | |
51 | while(i < req->noheaders) { | |
52 | if(!strncasecmp(req->headers[i][0], "x-ash-", 6)) { | |
53 | free(req->headers[i][0]); | |
54 | free(req->headers[i][1]); | |
55 | free(req->headers[i]); | |
56 | memmove(req->headers + i, req->headers + i + 1, sizeof(*req->headers) * (--req->noheaders - i)); | |
57 | } else { | |
58 | i++; | |
59 | } | |
60 | } | |
61 | } | |
62 | ||
5fc1bf9f | 63 | static struct hthead *parsereq(FILE *in) |
66987955 | 64 | { |
5fc1bf9f FT |
65 | struct hthead *req; |
66 | struct charbuf method, url, ver; | |
67 | int c; | |
66987955 | 68 | |
5fc1bf9f FT |
69 | req = NULL; |
70 | bufinit(method); | |
71 | bufinit(url); | |
72 | bufinit(ver); | |
73 | while(1) { | |
74 | c = getc(in); | |
75 | if(c == ' ') { | |
76 | break; | |
77 | } else if((c == EOF) || (c < 32) || (c >= 128)) { | |
78 | goto fail; | |
79 | } else { | |
80 | bufadd(method, c); | |
90b0ba0f FT |
81 | if(method.d >= 128) |
82 | goto fail; | |
66987955 | 83 | } |
c9955b14 | 84 | } |
c9955b14 | 85 | while(1) { |
5fc1bf9f FT |
86 | c = getc(in); |
87 | if(c == ' ') { | |
c9955b14 | 88 | break; |
5fc1bf9f FT |
89 | } else if((c == EOF) || (c < 32)) { |
90 | goto fail; | |
91 | } else { | |
92 | bufadd(url, c); | |
90b0ba0f FT |
93 | if(url.d >= 65536) |
94 | goto fail; | |
66987955 FT |
95 | } |
96 | } | |
66987955 | 97 | while(1) { |
5fc1bf9f FT |
98 | c = getc(in); |
99 | if(c == 10) { | |
66987955 | 100 | break; |
5fc1bf9f FT |
101 | } else if(c == 13) { |
102 | } else if((c == EOF) || (c < 32) || (c >= 128)) { | |
c9955b14 | 103 | goto fail; |
5fc1bf9f FT |
104 | } else { |
105 | bufadd(ver, c); | |
90b0ba0f FT |
106 | if(ver.d >= 128) |
107 | goto fail; | |
5fc1bf9f | 108 | } |
66987955 | 109 | } |
5fc1bf9f FT |
110 | bufadd(method, 0); |
111 | bufadd(url, 0); | |
112 | bufadd(ver, 0); | |
113 | req = mkreq(method.b, url.b, ver.b); | |
114 | if(parseheaders(req, in)) | |
115 | goto fail; | |
df431d1d | 116 | trimx(req); |
5fc1bf9f | 117 | goto out; |
c9955b14 FT |
118 | |
119 | fail: | |
5fc1bf9f FT |
120 | if(req != NULL) { |
121 | freehthead(req); | |
122 | req = NULL; | |
123 | } | |
124 | out: | |
125 | buffree(method); | |
126 | buffree(url); | |
127 | buffree(ver); | |
128 | return(req); | |
66987955 FT |
129 | } |
130 | ||
5fc1bf9f | 131 | static off_t passdata(FILE *in, FILE *out, off_t max) |
9d87a119 | 132 | { |
5fc1bf9f FT |
133 | size_t read; |
134 | off_t total; | |
135 | char buf[8192]; | |
136 | ||
137 | total = 0; | |
f9255ddd | 138 | while(!feof(in) && ((max < 0) || (total < max))) { |
5fc1bf9f FT |
139 | read = sizeof(buf); |
140 | if(max >= 0) | |
a701d7b7 | 141 | read = min(max - total, read); |
5fc1bf9f FT |
142 | read = fread(buf, 1, read, in); |
143 | if(ferror(in)) | |
144 | return(-1); | |
145 | if(fwrite(buf, 1, read, out) != read) | |
146 | return(-1); | |
147 | total += read; | |
9d87a119 | 148 | } |
5fc1bf9f FT |
149 | return(total); |
150 | } | |
151 | ||
8d19a9ec FT |
152 | static int recvchunks(FILE *in, FILE *out) |
153 | { | |
154 | char buf[8192]; | |
155 | size_t read, chlen; | |
156 | int c, r; | |
157 | ||
158 | while(1) { | |
159 | chlen = 0; | |
160 | r = 0; | |
161 | while(1) { | |
162 | c = getc(in); | |
163 | if(c == 10) { | |
164 | if(!r) | |
165 | return(-1); | |
166 | break; | |
167 | } else if(c == 13) { | |
168 | } else if((c >= '0') && (c <= '9')) { | |
169 | chlen = (chlen << 4) + (c - '0'); | |
170 | r = 1; | |
171 | } else if((c >= 'A') && (c <= 'F')) { | |
172 | chlen = (chlen << 4) + (c + 10 - 'A'); | |
173 | r = 1; | |
174 | } else if((c >= 'a') && (c <= 'f')) { | |
175 | chlen = (chlen << 4) + (c + 10 - 'a'); | |
176 | r = 1; | |
177 | } else { | |
178 | /* XXX: Technically, there may be chunk extensions to | |
179 | * be read, but since that will likely never actually | |
180 | * happen in practice, I can just as well add support | |
181 | * for that if it actually does become relevant. */ | |
182 | return(-1); | |
183 | } | |
184 | } | |
185 | if(chlen == 0) | |
186 | break; | |
187 | while(chlen > 0) { | |
188 | read = fread(buf, 1, min(sizeof(buf), chlen), in); | |
189 | if(feof(in) || ferror(in)) | |
190 | return(-1); | |
191 | if(fwrite(buf, 1, read, out) != read) | |
192 | return(-1); | |
193 | chlen -= read; | |
194 | } | |
195 | if((getc(in) != 13) || (getc(in) != 10)) | |
196 | return(-1); | |
197 | } | |
198 | /* XXX: Technically, there may be trailers to be read, but that's | |
199 | * just about as likely as chunk extensions. */ | |
200 | if((getc(in) != 13) || (getc(in) != 10)) | |
201 | return(-1); | |
202 | return(0); | |
203 | } | |
204 | ||
5fc1bf9f FT |
205 | static int passchunks(FILE *in, FILE *out) |
206 | { | |
207 | char buf[8192]; | |
208 | size_t read; | |
209 | ||
210 | do { | |
211 | read = fread(buf, 1, sizeof(buf), in); | |
212 | if(ferror(in)) | |
213 | return(-1); | |
f9255ddd | 214 | fprintf(out, "%zx\r\n", read); |
5fc1bf9f FT |
215 | if(fwrite(buf, 1, read, out) != read) |
216 | return(-1); | |
217 | fprintf(out, "\r\n"); | |
218 | } while(read > 0); | |
219 | return(0); | |
220 | } | |
221 | ||
222 | static int hasheader(struct hthead *head, char *name, char *val) | |
223 | { | |
224 | char *hd; | |
225 | ||
226 | if((hd = getheader(head, name)) == NULL) | |
227 | return(0); | |
228 | return(!strcasecmp(hd, val)); | |
9d87a119 FT |
229 | } |
230 | ||
64a9096a FT |
231 | static int canonreq(struct hthead *req) |
232 | { | |
233 | char *p, *p2, *r; | |
234 | int n; | |
235 | ||
236 | if(req->url[0] == '/') { | |
237 | replrest(req, req->url + 1); | |
238 | if((p = strchr(req->rest, '?')) != NULL) | |
239 | *p = 0; | |
240 | return(1); | |
241 | } | |
242 | if((p = strstr(req->url, "://")) != NULL) { | |
243 | n = p - req->url; | |
244 | if(((n == 4) && !strncasecmp(req->url, "http", 4)) || | |
245 | ((n == 5) && !strncasecmp(req->url, "https", 5))) { | |
246 | if(getheader(req, "host")) | |
247 | return(0); | |
248 | p += 3; | |
249 | if((p2 = strchr(p, '/')) == NULL) { | |
250 | headappheader(req, "Host", p); | |
251 | free(req->url); | |
252 | req->url = sstrdup("/"); | |
253 | } else { | |
254 | r = sstrdup(p2); | |
255 | *(p2++) = 0; | |
256 | headappheader(req, "Host", p); | |
257 | free(req->url); | |
258 | req->url = r; | |
259 | } | |
260 | replrest(req, req->url + 1); | |
261 | if((p = strchr(req->rest, '?')) != NULL) | |
262 | *p = 0; | |
263 | return(1); | |
264 | } | |
265 | } | |
266 | return(0); | |
267 | } | |
268 | ||
75bb20c8 FT |
269 | static int http10keep(struct hthead *req, struct hthead *resp) |
270 | { | |
271 | int fc; | |
272 | ||
273 | fc = hasheader(resp, "connection", "close"); | |
274 | headrmheader(resp, "connection"); | |
275 | if(!fc && hasheader(req, "connection", "keep-alive")) { | |
276 | headappheader(resp, "Connection", "Keep-Alive"); | |
277 | return(1); | |
278 | } else { | |
279 | return(0); | |
280 | } | |
281 | } | |
282 | ||
8774c31b | 283 | void serve(FILE *in, struct conn *conn) |
66987955 | 284 | { |
af34331c | 285 | int pfds[2]; |
8774c31b | 286 | FILE *out; |
9d87a119 | 287 | struct hthead *req, *resp; |
64a9096a | 288 | char *hd; |
5fc1bf9f | 289 | off_t dlen; |
75bb20c8 | 290 | int keep; |
66987955 | 291 | |
5fc1bf9f | 292 | out = NULL; |
3c296bd4 | 293 | req = resp = NULL; |
cac13158 | 294 | while(plex >= 0) { |
5fc1bf9f FT |
295 | if((req = parsereq(in)) == NULL) |
296 | break; | |
64a9096a FT |
297 | if(!canonreq(req)) |
298 | break; | |
9d87a119 | 299 | |
8774c31b FT |
300 | if((conn->initreq != NULL) && conn->initreq(conn, req)) |
301 | break; | |
302 | ||
cac13158 | 303 | if((plex < 0) || block(plex, EV_WRITE, 60) <= 0) |
5fc1bf9f | 304 | break; |
af34331c | 305 | if(socketpair(PF_UNIX, SOCK_STREAM, 0, pfds)) |
5fc1bf9f | 306 | break; |
af34331c | 307 | if(sendreq(plex, req, pfds[0])) |
5fc1bf9f | 308 | break; |
af34331c | 309 | close(pfds[0]); |
5fc1bf9f | 310 | out = mtstdopen(pfds[1], 1, 600, "r+"); |
a0327573 | 311 | |
8d19a9ec FT |
312 | if(getheader(req, "content-type") != NULL) { |
313 | if((hd = getheader(req, "content-length")) != NULL) { | |
314 | dlen = atoo(hd); | |
315 | if(dlen > 0) { | |
316 | if(passdata(in, out, dlen) != dlen) | |
317 | break; | |
318 | } | |
319 | } else if(((hd = getheader(req, "transfer-encoding")) != NULL) && !strcasecmp(hd, "chunked")) { | |
320 | if(recvchunks(in, out)) | |
5fc1bf9f | 321 | break; |
8d19a9ec | 322 | } else { |
2dbb9937 FT |
323 | /* Ignore rather than abort, to be kinder to broken clients. */ |
324 | headrmheader(req, "content-type"); | |
a06a2fbd | 325 | } |
a0327573 | 326 | } |
5fc1bf9f FT |
327 | if(fflush(out)) |
328 | break; | |
d93d9a05 | 329 | /* Make sure to send EOF */ |
5fc1bf9f | 330 | shutdown(pfds[1], SHUT_WR); |
9d87a119 | 331 | |
3ef78895 | 332 | if((resp = parseresponse(out)) == NULL) |
f9255ddd | 333 | break; |
5fc1bf9f | 334 | replstr(&resp->ver, req->ver); |
1c3e0167 FT |
335 | |
336 | if(!getheader(resp, "server")) | |
337 | headappheader(resp, "Server", sprintf3("ashd/%s", VERSION)); | |
5fc1bf9f | 338 | |
cefb0f7a | 339 | if(!strcasecmp(req->ver, "HTTP/1.0")) { |
18fb436d | 340 | if(!strcasecmp(req->method, "head")) { |
75bb20c8 FT |
341 | keep = http10keep(req, resp); |
342 | writeresp(in, resp); | |
343 | fprintf(in, "\r\n"); | |
18fb436d | 344 | } else if((hd = getheader(resp, "content-length")) != NULL) { |
75bb20c8 | 345 | keep = http10keep(req, resp); |
5226f7c5 | 346 | dlen = atoo(hd); |
75bb20c8 FT |
347 | writeresp(in, resp); |
348 | fprintf(in, "\r\n"); | |
5226f7c5 | 349 | if(passdata(out, in, dlen) != dlen) |
5fc1bf9f | 350 | break; |
5fc1bf9f | 351 | } else { |
75bb20c8 FT |
352 | headrmheader(resp, "connection"); |
353 | writeresp(in, resp); | |
354 | fprintf(in, "\r\n"); | |
5fc1bf9f FT |
355 | passdata(out, in, -1); |
356 | break; | |
9d87a119 | 357 | } |
75bb20c8 | 358 | if(!keep) |
5fc1bf9f | 359 | break; |
cefb0f7a | 360 | } else if(!strcasecmp(req->ver, "HTTP/1.1")) { |
18fb436d FT |
361 | if(!strcasecmp(req->method, "head")) { |
362 | writeresp(in, resp); | |
363 | fprintf(in, "\r\n"); | |
364 | } else if((hd = getheader(resp, "content-length")) != NULL) { | |
5fc1bf9f FT |
365 | writeresp(in, resp); |
366 | fprintf(in, "\r\n"); | |
5226f7c5 FT |
367 | dlen = atoo(hd); |
368 | if(passdata(out, in, dlen) != dlen) | |
5fc1bf9f FT |
369 | break; |
370 | } else if(!getheader(resp, "transfer-encoding")) { | |
371 | headappheader(resp, "Transfer-Encoding", "chunked"); | |
372 | writeresp(in, resp); | |
373 | fprintf(in, "\r\n"); | |
374 | if(passchunks(out, in)) | |
375 | break; | |
376 | } else { | |
377 | writeresp(in, resp); | |
378 | fprintf(in, "\r\n"); | |
379 | passdata(out, in, -1); | |
9d87a119 | 380 | break; |
5fc1bf9f FT |
381 | } |
382 | if(hasheader(req, "connection", "close") || hasheader(resp, "connection", "close")) | |
9d87a119 | 383 | break; |
5fc1bf9f FT |
384 | } else { |
385 | break; | |
9d87a119 | 386 | } |
5fc1bf9f FT |
387 | |
388 | fclose(out); | |
389 | out = NULL; | |
9d87a119 | 390 | freehthead(req); |
9d87a119 | 391 | freehthead(resp); |
5fc1bf9f | 392 | req = resp = NULL; |
66987955 FT |
393 | } |
394 | ||
5fc1bf9f FT |
395 | if(out != NULL) |
396 | fclose(out); | |
9d87a119 FT |
397 | if(req != NULL) |
398 | freehthead(req); | |
399 | if(resp != NULL) | |
400 | freehthead(resp); | |
5fc1bf9f | 401 | fclose(in); |
66987955 FT |
402 | } |
403 | ||
32e24c19 FT |
404 | static void plexwatch(struct muth *muth, va_list args) |
405 | { | |
406 | vavar(int, fd); | |
407 | char *buf; | |
4139016c | 408 | int i, s, ret; |
32e24c19 | 409 | |
4139016c | 410 | s = 0; |
32e24c19 | 411 | while(1) { |
cac13158 FT |
412 | if(block(fd, EV_READ, 0) == 0) |
413 | break; | |
32e24c19 FT |
414 | buf = smalloc(65536); |
415 | ret = recv(fd, buf, 65536, 0); | |
416 | if(ret < 0) { | |
417 | flog(LOG_WARNING, "received error on rootplex read channel: %s", strerror(errno)); | |
418 | exit(1); | |
419 | } else if(ret == 0) { | |
4139016c | 420 | s = 1; |
8e9ec020 FT |
421 | free(buf); |
422 | break; | |
32e24c19 FT |
423 | } |
424 | /* Maybe I'd like to implement some protocol in this direction | |
425 | * some day... */ | |
426 | free(buf); | |
427 | } | |
ecd4208b | 428 | shutdown(plex, SHUT_RDWR); |
8e9ec020 FT |
429 | for(i = 0; i < listeners.d; i++) { |
430 | if(listeners.b[i] == muth) | |
431 | bufdel(listeners, i); | |
432 | } | |
4139016c FT |
433 | if(s) { |
434 | flog(LOG_INFO, "root handler exited, so shutting down listening..."); | |
435 | while(listeners.d > 0) | |
436 | resume(listeners.b[0], 0); | |
437 | } | |
32e24c19 FT |
438 | } |
439 | ||
d341283f FT |
440 | static void initroot(void *uu) |
441 | { | |
442 | int fd; | |
443 | ||
cf91aa53 | 444 | setsid(); |
d341283f | 445 | if(daemonize) { |
d341283f FT |
446 | chdir("/"); |
447 | if((fd = open("/dev/null", O_RDWR)) >= 0) { | |
448 | dup2(fd, 0); | |
449 | dup2(fd, 1); | |
450 | dup2(fd, 2); | |
451 | close(fd); | |
452 | } | |
453 | } | |
454 | if(usesyslog) | |
455 | putenv("ASHD_USESYSLOG=1"); | |
456 | else | |
457 | unsetenv("ASHD_USESYSLOG"); | |
458 | } | |
459 | ||
8774c31b FT |
460 | static void usage(FILE *out) |
461 | { | |
43c58ba2 | 462 | fprintf(out, "usage: htparser [-hSf] [-u USER] [-r ROOT] [-p PIDFILE] PORTSPEC... -- ROOT [ARGS...]\n"); |
8774c31b | 463 | fprintf(out, "\twhere PORTSPEC is HANDLER[:PAR[=VAL][(,PAR[=VAL])...]] (try HANDLER:help)\n"); |
6ca53b2e | 464 | fprintf(out, "\tavailable handlers are `plain' and `ssl'.\n"); |
8774c31b FT |
465 | } |
466 | ||
467 | static void addport(char *spec) | |
468 | { | |
469 | char *nm, *p, *p2, *n; | |
470 | struct charvbuf pars, vals; | |
471 | ||
472 | bufinit(pars); | |
473 | bufinit(vals); | |
474 | if((p = strchr(spec, ':')) == NULL) { | |
475 | nm = spec; | |
476 | } else { | |
477 | nm = spec; | |
478 | *(p++) = 0; | |
479 | do { | |
480 | if((n = strchr(p, ',')) != NULL) | |
481 | *(n++) = 0; | |
482 | if((p2 = strchr(p, '=')) != NULL) | |
483 | *(p2++) = 0; | |
484 | if(!*p) { | |
485 | usage(stderr); | |
486 | exit(1); | |
487 | } | |
488 | bufadd(pars, p); | |
489 | if(p2) | |
490 | bufadd(vals, p2); | |
491 | else | |
492 | bufadd(vals, ""); | |
493 | } while((p = n) != NULL); | |
494 | } | |
495 | ||
496 | /* XXX: It would be nice to decentralize this, but, meh... */ | |
497 | if(!strcmp(nm, "plain")) { | |
498 | handleplain(pars.d, pars.b, vals.b); | |
6ca53b2e FT |
499 | #ifdef HAVE_GNUTLS |
500 | } else if(!strcmp(nm, "ssl")) { | |
501 | handlegnussl(pars.d, pars.b, vals.b); | |
502 | #endif | |
8774c31b FT |
503 | } else { |
504 | flog(LOG_ERR, "htparser: unknown port handler `%s'", nm); | |
505 | exit(1); | |
506 | } | |
507 | ||
508 | buffree(pars); | |
509 | buffree(vals); | |
510 | } | |
511 | ||
cac13158 FT |
512 | static void sighandler(int sig) |
513 | { | |
514 | exitioloop(1); | |
515 | } | |
516 | ||
f0bbedf7 FT |
517 | int main(int argc, char **argv) |
518 | { | |
cac13158 | 519 | int c, d; |
8774c31b | 520 | int i, s1; |
f0cbd8d7 | 521 | char *root; |
43c58ba2 | 522 | FILE *pidout; |
f0cbd8d7 | 523 | struct passwd *pwent; |
f4cdf919 | 524 | |
d341283f | 525 | daemonize = usesyslog = 0; |
f0cbd8d7 FT |
526 | root = NULL; |
527 | pwent = NULL; | |
43c58ba2 | 528 | while((c = getopt(argc, argv, "+hSfu:r:p:")) >= 0) { |
8774c31b FT |
529 | switch(c) { |
530 | case 'h': | |
531 | usage(stdout); | |
532 | exit(0); | |
f0cbd8d7 FT |
533 | case 'f': |
534 | daemonize = 1; | |
535 | break; | |
536 | case 'S': | |
d341283f | 537 | usesyslog = 1; |
f0cbd8d7 FT |
538 | break; |
539 | case 'u': | |
540 | if((pwent = getpwnam(optarg)) == NULL) { | |
541 | flog(LOG_ERR, "could not find user %s", optarg); | |
542 | exit(1); | |
543 | } | |
544 | break; | |
545 | case 'r': | |
546 | root = optarg; | |
547 | break; | |
43c58ba2 FT |
548 | case 'p': |
549 | pidfile = optarg; | |
550 | break; | |
8774c31b FT |
551 | default: |
552 | usage(stderr); | |
553 | exit(1); | |
554 | } | |
555 | } | |
8774c31b FT |
556 | s1 = 0; |
557 | for(i = optind; i < argc; i++) { | |
558 | if(!strcmp(argv[i], "--")) | |
559 | break; | |
560 | s1 = 1; | |
561 | addport(argv[i]); | |
9d87a119 | 562 | } |
8774c31b FT |
563 | if(!s1 || (i == argc)) { |
564 | usage(stderr); | |
565 | exit(1); | |
f4cdf919 | 566 | } |
d341283f | 567 | if((plex = stdmkchild(argv + ++i, initroot, NULL)) < 0) { |
8774c31b FT |
568 | flog(LOG_ERR, "could not spawn root multiplexer: %s", strerror(errno)); |
569 | return(1); | |
f4cdf919 | 570 | } |
cac13158 | 571 | bufadd(listeners, mustart(plexwatch, plex)); |
43c58ba2 FT |
572 | pidout = NULL; |
573 | if(pidfile != NULL) { | |
574 | if((pidout = fopen(pidfile, "w")) == NULL) { | |
575 | flog(LOG_ERR, "could not open %s for writing: %s", pidfile, strerror(errno)); | |
576 | return(1); | |
577 | } | |
578 | } | |
d341283f | 579 | if(usesyslog) |
f0cbd8d7 FT |
580 | opensyslog(); |
581 | if(root) { | |
0370bd82 | 582 | if(chdir(root) || chroot(root)) { |
f0cbd8d7 FT |
583 | flog(LOG_ERR, "could not chroot to %s: %s", root, strerror(errno)); |
584 | exit(1); | |
585 | } | |
586 | } | |
587 | if(pwent) { | |
588 | if(setgid(pwent->pw_gid)) { | |
589 | flog(LOG_ERR, "could not switch group to %i: %s", (int)pwent->pw_gid, strerror(errno)); | |
590 | exit(1); | |
591 | } | |
592 | if(setuid(pwent->pw_uid)) { | |
593 | flog(LOG_ERR, "could not switch user to %i: %s", (int)pwent->pw_uid, strerror(errno)); | |
594 | exit(1); | |
595 | } | |
596 | } | |
15fa3fe8 | 597 | signal(SIGPIPE, SIG_IGN); |
cac13158 FT |
598 | signal(SIGCHLD, SIG_IGN); |
599 | signal(SIGINT, sighandler); | |
600 | signal(SIGTERM, sighandler); | |
f0cbd8d7 FT |
601 | if(daemonize) { |
602 | daemon(0, 0); | |
603 | } | |
ee036f74 | 604 | if(pidout != NULL) { |
43c58ba2 | 605 | fprintf(pidout, "%i\n", getpid()); |
ee036f74 FT |
606 | fclose(pidout); |
607 | } | |
cac13158 FT |
608 | d = 0; |
609 | while(!d) { | |
610 | switch(ioloop()) { | |
611 | case 0: | |
612 | d = 1; | |
613 | break; | |
614 | case 1: | |
615 | if(listeners.d > 0) { | |
8e9ec020 FT |
616 | while(listeners.d > 0) |
617 | resume(listeners.b[0], 0); | |
cac13158 FT |
618 | flog(LOG_INFO, "no longer listening"); |
619 | } else { | |
620 | d = 1; | |
621 | } | |
622 | break; | |
623 | } | |
624 | } | |
f4cdf919 | 625 | return(0); |
f0bbedf7 | 626 | } |