| 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", home); |
| 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 | close(fd); |
| 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 | { |
| 204 | int i, fd; |
| 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); |
| 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); |
| 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 | } |
| 272 | if(fd < 0) { |
| 273 | if(tries++ < nolisten) { |
| 274 | sleep(1); |
| 275 | goto retry; |
| 276 | } |
| 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++) { |
| 446 | h = sprintf2("HTTP_%s", req->headers[i][0]); |
| 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 sigexit(int sig) |
| 584 | { |
| 585 | exit(0); |
| 586 | } |
| 587 | |
| 588 | static void usage(FILE *out) |
| 589 | { |
| 590 | fprintf(out, "usage: servescgi [-h] [-N RETRIES] [-i ID] [-u UNIX-PATH] [-t [HOST:]TCP-PORT] [PROGRAM [ARGS...]]\n"); |
| 591 | } |
| 592 | |
| 593 | int main(int argc, char **argv) |
| 594 | { |
| 595 | int c; |
| 596 | |
| 597 | while((c = getopt(argc, argv, "+hN:i:u:t:")) >= 0) { |
| 598 | switch(c) { |
| 599 | case 'h': |
| 600 | usage(stdout); |
| 601 | exit(0); |
| 602 | case 'N': |
| 603 | nolisten = atoi(optarg); |
| 604 | break; |
| 605 | case 'i': |
| 606 | sockid = optarg; |
| 607 | break; |
| 608 | case 'u': |
| 609 | unspec = optarg; |
| 610 | break; |
| 611 | case 't': |
| 612 | inspec = optarg; |
| 613 | break; |
| 614 | default: |
| 615 | usage(stderr); |
| 616 | exit(1); |
| 617 | } |
| 618 | } |
| 619 | progspec = argv + optind; |
| 620 | if(((sockid != NULL) + (unspec != NULL) + (inspec != NULL)) > 1) { |
| 621 | flog(LOG_ERR, "servescgi: at most one of -i, -u or -t may be given"); |
| 622 | exit(1); |
| 623 | } |
| 624 | signal(SIGCHLD, SIG_IGN); |
| 625 | signal(SIGINT, sigexit); |
| 626 | signal(SIGTERM, sigexit); |
| 627 | mustart(listenloop, 0); |
| 628 | atexit(killcuraddr); |
| 629 | ioloop(); |
| 630 | return(0); |
| 631 | } |