| 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> |
| 22 | #include <fcntl.h> |
| 23 | #include <string.h> |
| 24 | #include <sys/socket.h> |
| 25 | #include <pwd.h> |
| 26 | #include <sys/signal.h> |
| 27 | #include <errno.h> |
| 28 | |
| 29 | #ifdef HAVE_CONFIG_H |
| 30 | #include <config.h> |
| 31 | #endif |
| 32 | #include <utils.h> |
| 33 | #include <mt.h> |
| 34 | #include <mtio.h> |
| 35 | #include <log.h> |
| 36 | #include <req.h> |
| 37 | #include <proc.h> |
| 38 | #include <bufio.h> |
| 39 | |
| 40 | #include "htparser.h" |
| 41 | |
| 42 | static int plex; |
| 43 | static char *pidfile = NULL; |
| 44 | static int daemonize, usesyslog; |
| 45 | struct mtbuf listeners; |
| 46 | |
| 47 | static void trimx(struct hthead *req) |
| 48 | { |
| 49 | int i; |
| 50 | |
| 51 | i = 0; |
| 52 | while(i < req->noheaders) { |
| 53 | if(!strncasecmp(req->headers[i][0], "x-ash-", 6)) { |
| 54 | free(req->headers[i][0]); |
| 55 | free(req->headers[i][1]); |
| 56 | free(req->headers[i]); |
| 57 | memmove(req->headers + i, req->headers + i + 1, sizeof(*req->headers) * (--req->noheaders - i)); |
| 58 | } else { |
| 59 | i++; |
| 60 | } |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | static struct hthead *parsereq(struct bufio *in) |
| 65 | { |
| 66 | struct hthead *req; |
| 67 | struct charbuf method, url, ver; |
| 68 | int c; |
| 69 | |
| 70 | req = NULL; |
| 71 | bufinit(method); |
| 72 | bufinit(url); |
| 73 | bufinit(ver); |
| 74 | while(1) { |
| 75 | c = biogetc(in); |
| 76 | if(c == ' ') { |
| 77 | break; |
| 78 | } else if((c == EOF) || (c < 32) || (c >= 128)) { |
| 79 | goto fail; |
| 80 | } else { |
| 81 | bufadd(method, c); |
| 82 | if(method.d >= 128) |
| 83 | goto fail; |
| 84 | } |
| 85 | } |
| 86 | while(1) { |
| 87 | c = biogetc(in); |
| 88 | if(c == ' ') { |
| 89 | break; |
| 90 | } else if((c == EOF) || (c < 32)) { |
| 91 | goto fail; |
| 92 | } else { |
| 93 | bufadd(url, c); |
| 94 | if(url.d >= 65536) |
| 95 | goto fail; |
| 96 | } |
| 97 | } |
| 98 | while(1) { |
| 99 | c = biogetc(in); |
| 100 | if(c == 10) { |
| 101 | break; |
| 102 | } else if(c == 13) { |
| 103 | } else if((c == EOF) || (c < 32) || (c >= 128)) { |
| 104 | goto fail; |
| 105 | } else { |
| 106 | bufadd(ver, c); |
| 107 | if(ver.d >= 128) |
| 108 | goto fail; |
| 109 | } |
| 110 | } |
| 111 | bufadd(method, 0); |
| 112 | bufadd(url, 0); |
| 113 | bufadd(ver, 0); |
| 114 | req = mkreq(method.b, url.b, ver.b); |
| 115 | if(parseheadersb(req, in)) |
| 116 | goto fail; |
| 117 | trimx(req); |
| 118 | goto out; |
| 119 | |
| 120 | fail: |
| 121 | if(req != NULL) { |
| 122 | freehthead(req); |
| 123 | req = NULL; |
| 124 | } |
| 125 | out: |
| 126 | buffree(method); |
| 127 | buffree(url); |
| 128 | buffree(ver); |
| 129 | return(req); |
| 130 | } |
| 131 | |
| 132 | static off_t passdata(struct bufio *in, struct bufio *out, off_t max) |
| 133 | { |
| 134 | ssize_t read; |
| 135 | off_t total; |
| 136 | |
| 137 | total = 0; |
| 138 | while(!bioeof(in) && ((max < 0) || (total < max))) { |
| 139 | if((read = biordata(in)) > 0) { |
| 140 | if(max >= 0) |
| 141 | read = min(max - total, read); |
| 142 | if((read = biowritesome(out, in->rbuf.b + in->rh, read)) < 0) |
| 143 | return(-1); |
| 144 | in->rh += read; |
| 145 | total += read; |
| 146 | } |
| 147 | if(biorspace(in) && ((max < 0) || (biordata(in) < max - total)) && (biofillsome(in) < 0)) |
| 148 | return(-1); |
| 149 | } |
| 150 | return(total); |
| 151 | } |
| 152 | |
| 153 | static int recvchunks(struct bufio *in, struct bufio *out) |
| 154 | { |
| 155 | ssize_t read, chlen; |
| 156 | int c, r; |
| 157 | |
| 158 | while(1) { |
| 159 | chlen = 0; |
| 160 | r = 0; |
| 161 | while(1) { |
| 162 | c = biogetc(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 | if((read = biordata(in)) > 0) { |
| 189 | if((read = biowritesome(out, in->rbuf.b + in->rh, min(read, chlen))) < 0) |
| 190 | return(-1); |
| 191 | in->rh += read; |
| 192 | chlen -= read; |
| 193 | } |
| 194 | if(biorspace(in) && (biordata(in) < chlen) && (biofillsome(in) <= 0)) |
| 195 | return(-1); |
| 196 | } |
| 197 | if((biogetc(in) != 13) || (biogetc(in) != 10)) |
| 198 | return(-1); |
| 199 | } |
| 200 | /* XXX: Technically, there may be trailers to be read, but that's |
| 201 | * just about as likely as chunk extensions. */ |
| 202 | if((biogetc(in) != 13) || (biogetc(in) != 10)) |
| 203 | return(-1); |
| 204 | return(0); |
| 205 | } |
| 206 | |
| 207 | static int passchunks(struct bufio *in, struct bufio *out) |
| 208 | { |
| 209 | size_t read; |
| 210 | |
| 211 | while(!bioeof(in)) { |
| 212 | if((read = biordata(in)) > 0) { |
| 213 | bioprintf(out, "%zx\r\n", read); |
| 214 | if(biowrite(out, in->rbuf.b + in->rh, read) != read) |
| 215 | return(-1); |
| 216 | in->rh += read; |
| 217 | bioprintf(out, "\r\n"); |
| 218 | if(bioflush(out) < 0) |
| 219 | return(-1); |
| 220 | } |
| 221 | if(biorspace(in) && (biofillsome(in) < 0)) |
| 222 | return(-1); |
| 223 | } |
| 224 | bioprintf(out, "0\r\n\r\n"); |
| 225 | return(0); |
| 226 | } |
| 227 | |
| 228 | static int hasheader(struct hthead *head, char *name, char *val) |
| 229 | { |
| 230 | char *hd; |
| 231 | |
| 232 | if((hd = getheader(head, name)) == NULL) |
| 233 | return(0); |
| 234 | return(!strcasecmp(hd, val)); |
| 235 | } |
| 236 | |
| 237 | static int canonreq(struct hthead *req) |
| 238 | { |
| 239 | char *p, *p2, *r; |
| 240 | int n; |
| 241 | |
| 242 | if(req->url[0] == '/') { |
| 243 | replrest(req, req->url + 1); |
| 244 | if((p = strchr(req->rest, '?')) != NULL) |
| 245 | *p = 0; |
| 246 | return(1); |
| 247 | } |
| 248 | if((p = strstr(req->url, "://")) != NULL) { |
| 249 | n = p - req->url; |
| 250 | if(((n == 4) && !strncasecmp(req->url, "http", 4)) || |
| 251 | ((n == 5) && !strncasecmp(req->url, "https", 5))) { |
| 252 | if(getheader(req, "host")) |
| 253 | return(0); |
| 254 | p += 3; |
| 255 | if((p2 = strchr(p, '/')) == NULL) { |
| 256 | headappheader(req, "Host", p); |
| 257 | free(req->url); |
| 258 | req->url = sstrdup("/"); |
| 259 | } else { |
| 260 | r = sstrdup(p2); |
| 261 | *(p2++) = 0; |
| 262 | headappheader(req, "Host", p); |
| 263 | free(req->url); |
| 264 | req->url = r; |
| 265 | } |
| 266 | replrest(req, req->url + 1); |
| 267 | if((p = strchr(req->rest, '?')) != NULL) |
| 268 | *p = 0; |
| 269 | return(1); |
| 270 | } |
| 271 | } |
| 272 | return(0); |
| 273 | } |
| 274 | |
| 275 | static int http10keep(struct hthead *req, struct hthead *resp) |
| 276 | { |
| 277 | int fc; |
| 278 | |
| 279 | fc = hasheader(resp, "connection", "close"); |
| 280 | headrmheader(resp, "connection"); |
| 281 | if(!fc && hasheader(req, "connection", "keep-alive")) { |
| 282 | headappheader(resp, "Connection", "Keep-Alive"); |
| 283 | return(1); |
| 284 | } else { |
| 285 | return(0); |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | static char *connid(void) |
| 290 | { |
| 291 | static struct charbuf cur; |
| 292 | int i; |
| 293 | char *ret; |
| 294 | |
| 295 | for(i = 0; i < cur.d; i++) { |
| 296 | if((++cur.b[i]) > 'Z') |
| 297 | cur.b[i] = 'A'; |
| 298 | else |
| 299 | goto done; |
| 300 | } |
| 301 | bufadd(cur, 'A'); |
| 302 | done: |
| 303 | ret = memcpy(smalloc(cur.d + 1), cur.b, cur.d); |
| 304 | ret[cur.d] = 0; |
| 305 | return(ret); |
| 306 | } |
| 307 | |
| 308 | static void passduplex(struct bufio *a, int afd, struct bufio *b, int bfd) |
| 309 | { |
| 310 | struct selected pfd[4], sel; |
| 311 | struct bufio *sio; |
| 312 | int n, ev; |
| 313 | |
| 314 | while(!bioeof(a) && !bioeof(b)) { |
| 315 | biocopybuf(b, a); |
| 316 | biocopybuf(a, b); |
| 317 | n = 0; |
| 318 | if(!a->eof) { |
| 319 | ev = 0; |
| 320 | if(biorspace(a)) |
| 321 | ev |= EV_READ; |
| 322 | if(biowdata(a)) |
| 323 | ev |= EV_WRITE; |
| 324 | if(ev) |
| 325 | pfd[n++] = (struct selected){.fd = afd, .ev = ev}; |
| 326 | } |
| 327 | if(!b->eof) { |
| 328 | ev = 0; |
| 329 | if(!b->eof && biorspace(b)) |
| 330 | ev |= EV_READ; |
| 331 | if(biowdata(b)) |
| 332 | ev |= EV_WRITE; |
| 333 | if(ev) |
| 334 | pfd[n++] = (struct selected){.fd = bfd, .ev = ev}; |
| 335 | } |
| 336 | if((sel = mblock(600, n, pfd)).ev == 0) |
| 337 | break; |
| 338 | if(sel.fd == afd) |
| 339 | sio = a; |
| 340 | else if(sel.fd == bfd) |
| 341 | sio = b; |
| 342 | else |
| 343 | break; |
| 344 | if((sel.ev & EV_READ) && (biofillsome(sio) < 0)) |
| 345 | break; |
| 346 | if((sel.ev & EV_WRITE) && (bioflushsome(sio) < 0)) |
| 347 | break; |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | void serve(struct bufio *in, int infd, struct conn *conn) |
| 352 | { |
| 353 | int pfds[2]; |
| 354 | struct bufio *out, *dout; |
| 355 | struct stdiofd *outi; |
| 356 | struct hthead *req, *resp; |
| 357 | char *hd, *id; |
| 358 | off_t dlen; |
| 359 | int keep, duplex; |
| 360 | |
| 361 | id = connid(); |
| 362 | out = NULL; |
| 363 | req = resp = NULL; |
| 364 | while(plex >= 0) { |
| 365 | bioflush(in); |
| 366 | if((req = parsereq(in)) == NULL) |
| 367 | break; |
| 368 | if(!canonreq(req)) |
| 369 | break; |
| 370 | |
| 371 | headappheader(req, "X-Ash-Connection-ID", id); |
| 372 | if((conn->initreq != NULL) && conn->initreq(conn, req)) |
| 373 | break; |
| 374 | |
| 375 | if((plex < 0) || block(plex, EV_WRITE, 60) <= 0) |
| 376 | break; |
| 377 | if(socketpair(PF_UNIX, SOCK_STREAM, 0, pfds)) |
| 378 | break; |
| 379 | if(sendreq(plex, req, pfds[0])) |
| 380 | break; |
| 381 | close(pfds[0]); |
| 382 | out = mtbioopen(pfds[1], 1, 600, "r+", &outi); |
| 383 | |
| 384 | if(getheader(req, "content-type") != NULL) { |
| 385 | if((hd = getheader(req, "content-length")) != NULL) { |
| 386 | dlen = atoo(hd); |
| 387 | if(dlen > 0) { |
| 388 | if(passdata(in, out, dlen) != dlen) |
| 389 | break; |
| 390 | } |
| 391 | } else if(((hd = getheader(req, "transfer-encoding")) != NULL) && !strcasecmp(hd, "chunked")) { |
| 392 | if(recvchunks(in, out)) |
| 393 | break; |
| 394 | } else { |
| 395 | /* Ignore rather than abort, to be kinder to broken clients. */ |
| 396 | headrmheader(req, "content-type"); |
| 397 | } |
| 398 | } |
| 399 | if(bioflush(out)) |
| 400 | break; |
| 401 | /* Make sure to send EOF */ |
| 402 | shutdown(pfds[1], SHUT_WR); |
| 403 | |
| 404 | if((resp = parseresponseb(out)) == NULL) |
| 405 | break; |
| 406 | replstr(&resp->ver, req->ver); |
| 407 | |
| 408 | if(!getheader(resp, "server")) |
| 409 | headappheader(resp, "Server", sprintf3("ashd/%s", VERSION)); |
| 410 | duplex = hasheader(resp, "x-ash-switch", "duplex"); |
| 411 | trimx(resp); |
| 412 | |
| 413 | if(duplex) { |
| 414 | if(outi->rights < 0) |
| 415 | break; |
| 416 | writerespb(in, resp); |
| 417 | bioprintf(in, "\r\n"); |
| 418 | dout = mtbioopen(outi->rights, 1, 600, "r+", NULL); |
| 419 | passduplex(in, infd, dout, outi->rights); |
| 420 | outi->rights = -1; |
| 421 | bioclose(dout); |
| 422 | break; |
| 423 | } else if(!strcasecmp(req->ver, "HTTP/1.0")) { |
| 424 | if(!strcasecmp(req->method, "head")) { |
| 425 | keep = http10keep(req, resp); |
| 426 | writerespb(in, resp); |
| 427 | bioprintf(in, "\r\n"); |
| 428 | } else if((hd = getheader(resp, "content-length")) != NULL) { |
| 429 | keep = http10keep(req, resp); |
| 430 | dlen = atoo(hd); |
| 431 | writerespb(in, resp); |
| 432 | bioprintf(in, "\r\n"); |
| 433 | if(passdata(out, in, dlen) != dlen) |
| 434 | break; |
| 435 | } else { |
| 436 | headrmheader(resp, "connection"); |
| 437 | writerespb(in, resp); |
| 438 | bioprintf(in, "\r\n"); |
| 439 | passdata(out, in, -1); |
| 440 | break; |
| 441 | } |
| 442 | if(!keep) |
| 443 | break; |
| 444 | } else if(!strcasecmp(req->ver, "HTTP/1.1")) { |
| 445 | if(!strcasecmp(req->method, "head")) { |
| 446 | writerespb(in, resp); |
| 447 | bioprintf(in, "\r\n"); |
| 448 | } else if((hd = getheader(resp, "content-length")) != NULL) { |
| 449 | writerespb(in, resp); |
| 450 | bioprintf(in, "\r\n"); |
| 451 | dlen = atoo(hd); |
| 452 | if(passdata(out, in, dlen) != dlen) |
| 453 | break; |
| 454 | } else if(!getheader(resp, "transfer-encoding")) { |
| 455 | headappheader(resp, "Transfer-Encoding", "chunked"); |
| 456 | writerespb(in, resp); |
| 457 | bioprintf(in, "\r\n"); |
| 458 | if(passchunks(out, in)) |
| 459 | break; |
| 460 | } else { |
| 461 | writerespb(in, resp); |
| 462 | bioprintf(in, "\r\n"); |
| 463 | passdata(out, in, -1); |
| 464 | break; |
| 465 | } |
| 466 | if(hasheader(req, "connection", "close") || hasheader(resp, "connection", "close")) |
| 467 | break; |
| 468 | } else { |
| 469 | break; |
| 470 | } |
| 471 | |
| 472 | bioclose(out); |
| 473 | out = NULL; |
| 474 | freehthead(req); |
| 475 | freehthead(resp); |
| 476 | req = resp = NULL; |
| 477 | } |
| 478 | |
| 479 | if(out != NULL) |
| 480 | bioclose(out); |
| 481 | if(req != NULL) |
| 482 | freehthead(req); |
| 483 | if(resp != NULL) |
| 484 | freehthead(resp); |
| 485 | bioclose(in); |
| 486 | free(id); |
| 487 | } |
| 488 | |
| 489 | static void plexwatch(struct muth *muth, va_list args) |
| 490 | { |
| 491 | vavar(int, fd); |
| 492 | char *buf; |
| 493 | int i, s, ret; |
| 494 | |
| 495 | s = 0; |
| 496 | while(1) { |
| 497 | if(block(fd, EV_READ, 0) == 0) |
| 498 | break; |
| 499 | buf = smalloc(65536); |
| 500 | ret = recv(fd, buf, 65536, 0); |
| 501 | if(ret < 0) { |
| 502 | flog(LOG_WARNING, "received error on rootplex read channel: %s", strerror(errno)); |
| 503 | exit(1); |
| 504 | } else if(ret == 0) { |
| 505 | s = 1; |
| 506 | free(buf); |
| 507 | break; |
| 508 | } |
| 509 | /* Maybe I'd like to implement some protocol in this direction |
| 510 | * some day... */ |
| 511 | free(buf); |
| 512 | } |
| 513 | shutdown(plex, SHUT_RDWR); |
| 514 | for(i = 0; i < listeners.d; i++) { |
| 515 | if(listeners.b[i] == muth) |
| 516 | bufdel(listeners, i); |
| 517 | } |
| 518 | if(s) { |
| 519 | flog(LOG_INFO, "root handler exited, so shutting down listening..."); |
| 520 | while(listeners.d > 0) |
| 521 | resume(listeners.b[0], 0); |
| 522 | } |
| 523 | } |
| 524 | |
| 525 | static void initroot(void *uu) |
| 526 | { |
| 527 | int fd; |
| 528 | |
| 529 | setsid(); |
| 530 | if(daemonize) { |
| 531 | chdir("/"); |
| 532 | if((fd = open("/dev/null", O_RDWR)) >= 0) { |
| 533 | dup2(fd, 0); |
| 534 | dup2(fd, 1); |
| 535 | dup2(fd, 2); |
| 536 | close(fd); |
| 537 | } |
| 538 | } |
| 539 | if(usesyslog) |
| 540 | putenv("ASHD_USESYSLOG=1"); |
| 541 | else |
| 542 | unsetenv("ASHD_USESYSLOG"); |
| 543 | } |
| 544 | |
| 545 | static void usage(FILE *out) |
| 546 | { |
| 547 | fprintf(out, "usage: htparser [-hSf] [-u USER] [-r ROOT] [-p PIDFILE] PORTSPEC... -- ROOT [ARGS...]\n"); |
| 548 | fprintf(out, "\twhere PORTSPEC is HANDLER[:PAR[=VAL][(,PAR[=VAL])...]] (try HANDLER:help)\n"); |
| 549 | fprintf(out, "\tavailable handlers are `plain' and `ssl'.\n"); |
| 550 | } |
| 551 | |
| 552 | static void addport(char *spec) |
| 553 | { |
| 554 | char *nm, *p, *p2, *n; |
| 555 | struct charvbuf pars, vals; |
| 556 | |
| 557 | bufinit(pars); |
| 558 | bufinit(vals); |
| 559 | if((p = strchr(spec, ':')) == NULL) { |
| 560 | nm = spec; |
| 561 | } else { |
| 562 | nm = spec; |
| 563 | *(p++) = 0; |
| 564 | do { |
| 565 | if((n = strchr(p, ',')) != NULL) |
| 566 | *(n++) = 0; |
| 567 | if((p2 = strchr(p, '=')) != NULL) |
| 568 | *(p2++) = 0; |
| 569 | if(!*p) { |
| 570 | usage(stderr); |
| 571 | exit(1); |
| 572 | } |
| 573 | bufadd(pars, p); |
| 574 | if(p2) |
| 575 | bufadd(vals, p2); |
| 576 | else |
| 577 | bufadd(vals, ""); |
| 578 | } while((p = n) != NULL); |
| 579 | } |
| 580 | |
| 581 | /* XXX: It would be nice to decentralize this, but, meh... */ |
| 582 | if(!strcmp(nm, "plain")) { |
| 583 | handleplain(pars.d, pars.b, vals.b); |
| 584 | #ifdef HAVE_GNUTLS |
| 585 | } else if(!strcmp(nm, "ssl")) { |
| 586 | handlegnussl(pars.d, pars.b, vals.b); |
| 587 | #endif |
| 588 | } else { |
| 589 | flog(LOG_ERR, "htparser: unknown port handler `%s'", nm); |
| 590 | exit(1); |
| 591 | } |
| 592 | |
| 593 | buffree(pars); |
| 594 | buffree(vals); |
| 595 | } |
| 596 | |
| 597 | static void sighandler(int sig) |
| 598 | { |
| 599 | exitioloop(1); |
| 600 | } |
| 601 | |
| 602 | int main(int argc, char **argv) |
| 603 | { |
| 604 | int c, d; |
| 605 | int i, s1; |
| 606 | char *root; |
| 607 | FILE *pidout; |
| 608 | struct passwd *pwent; |
| 609 | |
| 610 | daemonize = usesyslog = 0; |
| 611 | root = NULL; |
| 612 | pwent = NULL; |
| 613 | while((c = getopt(argc, argv, "+hSfu:r:p:")) >= 0) { |
| 614 | switch(c) { |
| 615 | case 'h': |
| 616 | usage(stdout); |
| 617 | exit(0); |
| 618 | case 'f': |
| 619 | daemonize = 1; |
| 620 | break; |
| 621 | case 'S': |
| 622 | usesyslog = 1; |
| 623 | break; |
| 624 | case 'u': |
| 625 | if((pwent = getpwnam(optarg)) == NULL) { |
| 626 | flog(LOG_ERR, "could not find user %s", optarg); |
| 627 | exit(1); |
| 628 | } |
| 629 | break; |
| 630 | case 'r': |
| 631 | root = optarg; |
| 632 | break; |
| 633 | case 'p': |
| 634 | pidfile = optarg; |
| 635 | break; |
| 636 | default: |
| 637 | usage(stderr); |
| 638 | exit(1); |
| 639 | } |
| 640 | } |
| 641 | s1 = 0; |
| 642 | for(i = optind; i < argc; i++) { |
| 643 | if(!strcmp(argv[i], "--")) |
| 644 | break; |
| 645 | s1 = 1; |
| 646 | addport(argv[i]); |
| 647 | } |
| 648 | if(!s1 || (i == argc)) { |
| 649 | usage(stderr); |
| 650 | exit(1); |
| 651 | } |
| 652 | if((plex = stdmkchild(argv + ++i, initroot, NULL)) < 0) { |
| 653 | flog(LOG_ERR, "could not spawn root multiplexer: %s", strerror(errno)); |
| 654 | return(1); |
| 655 | } |
| 656 | bufadd(listeners, mustart(plexwatch, plex)); |
| 657 | pidout = NULL; |
| 658 | if(pidfile != NULL) { |
| 659 | if((pidout = fopen(pidfile, "w")) == NULL) { |
| 660 | flog(LOG_ERR, "could not open %s for writing: %s", pidfile, strerror(errno)); |
| 661 | return(1); |
| 662 | } |
| 663 | } |
| 664 | if(usesyslog) |
| 665 | opensyslog(); |
| 666 | if(root) { |
| 667 | if(chdir(root) || chroot(root)) { |
| 668 | flog(LOG_ERR, "could not chroot to %s: %s", root, strerror(errno)); |
| 669 | exit(1); |
| 670 | } |
| 671 | } |
| 672 | if(pwent) { |
| 673 | if(setgid(pwent->pw_gid)) { |
| 674 | flog(LOG_ERR, "could not switch group to %i: %s", (int)pwent->pw_gid, strerror(errno)); |
| 675 | exit(1); |
| 676 | } |
| 677 | if(setuid(pwent->pw_uid)) { |
| 678 | flog(LOG_ERR, "could not switch user to %i: %s", (int)pwent->pw_uid, strerror(errno)); |
| 679 | exit(1); |
| 680 | } |
| 681 | } |
| 682 | signal(SIGPIPE, SIG_IGN); |
| 683 | signal(SIGCHLD, SIG_IGN); |
| 684 | signal(SIGINT, sighandler); |
| 685 | signal(SIGTERM, sighandler); |
| 686 | if(daemonize) { |
| 687 | daemon(0, 0); |
| 688 | } |
| 689 | if(pidout != NULL) { |
| 690 | fprintf(pidout, "%i\n", getpid()); |
| 691 | fclose(pidout); |
| 692 | } |
| 693 | d = 0; |
| 694 | while(!d) { |
| 695 | switch(ioloop()) { |
| 696 | case 0: |
| 697 | d = 1; |
| 698 | break; |
| 699 | case 1: |
| 700 | if(listeners.d > 0) { |
| 701 | while(listeners.d > 0) |
| 702 | resume(listeners.b[0], 0); |
| 703 | flog(LOG_INFO, "no longer listening"); |
| 704 | } else { |
| 705 | d = 1; |
| 706 | } |
| 707 | break; |
| 708 | } |
| 709 | } |
| 710 | return(0); |
| 711 | } |