1 /*- 2 * Copyright (c) 2002-2003 M. Warner Losh. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 /* 28 * DEVD control daemon. 29 */ 30 31 // TODO list: 32 // o devd.conf and devd man pages need a lot of help: 33 // - devd needs to document the unix domain socket 34 // - devd.conf needs more details on the supported statements. 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include <sys/param.h> 40 #include <sys/socket.h> 41 #include <sys/stat.h> 42 #include <sys/sysctl.h> 43 #include <sys/types.h> 44 #include <sys/un.h> 45 46 #include <ctype.h> 47 #include <dirent.h> 48 #include <errno.h> 49 #include <err.h> 50 #include <fcntl.h> 51 #include <regex.h> 52 #include <signal.h> 53 #include <stdlib.h> 54 #include <stdio.h> 55 #include <string.h> 56 #include <unistd.h> 57 58 #include <algorithm> 59 #include <map> 60 #include <string> 61 #include <list> 62 #include <vector> 63 64 #include "devd.h" /* C compatible definitions */ 65 #include "devd.hh" /* C++ class definitions */ 66 67 #define PIPE "/var/run/devd.pipe" 68 #define CF "/etc/devd.conf" 69 #define SYSCTL "hw.bus.devctl_disable" 70 71 using namespace std; 72 73 extern FILE *yyin; 74 extern int lineno; 75 76 static const char notify = '!'; 77 static const char nomatch = '?'; 78 static const char attach = '+'; 79 static const char detach = '-'; 80 81 int Dflag; 82 int dflag; 83 int nflag; 84 int romeo_must_die = 0; 85 86 static void event_loop(void); 87 static void usage(void); 88 89 template <class T> void 90 delete_and_clear(vector<T *> &v) 91 { 92 typename vector<T *>::const_iterator i; 93 94 for (i = v.begin(); i != v.end(); i++) 95 delete *i; 96 v.clear(); 97 } 98 99 config cfg; 100 101 event_proc::event_proc() : _prio(-1) 102 { 103 // nothing 104 } 105 106 event_proc::~event_proc() 107 { 108 vector<eps *>::const_iterator i; 109 110 for (i = _epsvec.begin(); i != _epsvec.end(); i++) 111 delete *i; 112 _epsvec.clear(); 113 } 114 115 void 116 event_proc::add(eps *eps) 117 { 118 _epsvec.push_back(eps); 119 } 120 121 bool 122 event_proc::matches(config &c) 123 { 124 vector<eps *>::const_iterator i; 125 126 for (i = _epsvec.begin(); i != _epsvec.end(); i++) 127 if (!(*i)->do_match(c)) 128 return (false); 129 return (true); 130 } 131 132 bool 133 event_proc::run(config &c) 134 { 135 vector<eps *>::const_iterator i; 136 137 for (i = _epsvec.begin(); i != _epsvec.end(); i++) 138 if (!(*i)->do_action(c)) 139 return (false); 140 return (true); 141 } 142 143 action::action(const char *cmd) 144 : _cmd(cmd) 145 { 146 // nothing 147 } 148 149 action::~action() 150 { 151 // nothing 152 } 153 154 bool 155 action::do_action(config &c) 156 { 157 string s = c.expand_string(_cmd); 158 if (Dflag) 159 fprintf(stderr, "Executing '%s'\n", s.c_str()); 160 ::system(s.c_str()); 161 return (true); 162 } 163 164 match::match(config &c, const char *var, const char *re) 165 : _var(var) 166 { 167 string pattern = re; 168 _re = "^"; 169 _re.append(c.expand_string(string(re))); 170 _re.append("$"); 171 regcomp(&_regex, _re.c_str(), REG_EXTENDED | REG_NOSUB); 172 } 173 174 match::~match() 175 { 176 regfree(&_regex); 177 } 178 179 bool 180 match::do_match(config &c) 181 { 182 string value = c.get_variable(_var); 183 bool retval; 184 185 if (Dflag) 186 fprintf(stderr, "Testing %s=%s against %s\n", _var.c_str(), 187 value.c_str(), _re.c_str()); 188 189 retval = (regexec(&_regex, value.c_str(), 0, NULL, 0) == 0); 190 return retval; 191 } 192 193 #include <sys/sockio.h> 194 #include <net/if.h> 195 #include <net/if_media.h> 196 197 media::media(config &c, const char *var, const char *type) 198 : _var(var), _type(-1) 199 { 200 static struct ifmedia_description media_types[] = { 201 { IFM_ETHER, "Ethernet" }, 202 { IFM_TOKEN, "Tokenring" }, 203 { IFM_FDDI, "FDDI" }, 204 { IFM_IEEE80211, "802.11" }, 205 { IFM_ATM, "ATM" }, 206 { IFM_CARP, "CARP" }, 207 { -1, "unknown" }, 208 { 0, NULL }, 209 }; 210 for (int i = 0; media_types[i].ifmt_string != NULL; i++) 211 if (strcasecmp(type, media_types[i].ifmt_string) == 0) { 212 _type = media_types[i].ifmt_word; 213 break; 214 } 215 } 216 217 media::~media() 218 { 219 } 220 221 bool 222 media::do_match(config &c) 223 { 224 string value = c.get_variable("device-name"); 225 struct ifmediareq ifmr; 226 bool retval; 227 int s; 228 229 if (Dflag) 230 fprintf(stderr, "Testing media type of %s against 0x%x\n", 231 value.c_str(), _type); 232 233 retval = false; 234 235 s = socket(PF_INET, SOCK_DGRAM, 0); 236 if (s >= 0) { 237 memset(&ifmr, 0, sizeof(ifmr)); 238 strncpy(ifmr.ifm_name, value.c_str(), sizeof(ifmr.ifm_name)); 239 240 if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) >= 0 && 241 ifmr.ifm_status & IFM_AVALID) { 242 if (Dflag) 243 fprintf(stderr, "%s has media type 0x%x\n", 244 value.c_str(), IFM_TYPE(ifmr.ifm_active)); 245 retval = (IFM_TYPE(ifmr.ifm_active) == _type); 246 } else if (_type == -1) { 247 if (Dflag) 248 fprintf(stderr, "%s has unknown media type\n", 249 value.c_str()); 250 retval = true; 251 } 252 close(s); 253 } 254 255 return retval; 256 } 257 258 const string var_list::bogus = "_$_$_$_$_B_O_G_U_S_$_$_$_$_"; 259 const string var_list::nothing = ""; 260 261 const string & 262 var_list::get_variable(const string &var) const 263 { 264 map<string, string>::const_iterator i; 265 266 i = _vars.find(var); 267 if (i == _vars.end()) 268 return (var_list::bogus); 269 return (i->second); 270 } 271 272 bool 273 var_list::is_set(const string &var) const 274 { 275 return (_vars.find(var) != _vars.end()); 276 } 277 278 void 279 var_list::set_variable(const string &var, const string &val) 280 { 281 if (Dflag) 282 fprintf(stderr, "setting %s=%s\n", var.c_str(), val.c_str()); 283 _vars[var] = val; 284 } 285 286 void 287 config::reset(void) 288 { 289 _dir_list.clear(); 290 delete_and_clear(_var_list_table); 291 delete_and_clear(_attach_list); 292 delete_and_clear(_detach_list); 293 delete_and_clear(_nomatch_list); 294 delete_and_clear(_notify_list); 295 } 296 297 void 298 config::parse_one_file(const char *fn) 299 { 300 if (Dflag) 301 printf("Parsing %s\n", fn); 302 yyin = fopen(fn, "r"); 303 if (yyin == NULL) 304 err(1, "Cannot open config file %s", fn); 305 if (yyparse() != 0) 306 errx(1, "Cannot parse %s at line %d", fn, lineno); 307 fclose(yyin); 308 } 309 310 void 311 config::parse_files_in_dir(const char *dirname) 312 { 313 DIR *dirp; 314 struct dirent *dp; 315 char path[PATH_MAX]; 316 317 if (Dflag) 318 printf("Parsing files in %s\n", dirname); 319 dirp = opendir(dirname); 320 if (dirp == NULL) 321 return; 322 readdir(dirp); /* Skip . */ 323 readdir(dirp); /* Skip .. */ 324 while ((dp = readdir(dirp)) != NULL) { 325 if (strcmp(dp->d_name + dp->d_namlen - 5, ".conf") == 0) { 326 snprintf(path, sizeof(path), "%s/%s", 327 dirname, dp->d_name); 328 parse_one_file(path); 329 } 330 } 331 } 332 333 class epv_greater { 334 public: 335 int operator()(event_proc *const&l1, event_proc *const&l2) 336 { 337 return (l1->get_priority() > l2->get_priority()); 338 } 339 }; 340 341 void 342 config::sort_vector(vector<event_proc *> &v) 343 { 344 sort(v.begin(), v.end(), epv_greater()); 345 } 346 347 void 348 config::parse(void) 349 { 350 vector<string>::const_iterator i; 351 352 parse_one_file(CF); 353 for (i = _dir_list.begin(); i != _dir_list.end(); i++) 354 parse_files_in_dir((*i).c_str()); 355 sort_vector(_attach_list); 356 sort_vector(_detach_list); 357 sort_vector(_nomatch_list); 358 sort_vector(_notify_list); 359 } 360 361 void 362 config::drop_pidfile() 363 { 364 FILE *fp; 365 366 if (_pidfile == "") 367 return; 368 fp = fopen(_pidfile.c_str(), "w"); 369 if (fp == NULL) 370 return; 371 fprintf(fp, "%d\n", getpid()); 372 fclose(fp); 373 } 374 375 void 376 config::add_attach(int prio, event_proc *p) 377 { 378 p->set_priority(prio); 379 _attach_list.push_back(p); 380 } 381 382 void 383 config::add_detach(int prio, event_proc *p) 384 { 385 p->set_priority(prio); 386 _detach_list.push_back(p); 387 } 388 389 void 390 config::add_directory(const char *dir) 391 { 392 _dir_list.push_back(string(dir)); 393 } 394 395 void 396 config::add_nomatch(int prio, event_proc *p) 397 { 398 p->set_priority(prio); 399 _nomatch_list.push_back(p); 400 } 401 402 void 403 config::add_notify(int prio, event_proc *p) 404 { 405 p->set_priority(prio); 406 _notify_list.push_back(p); 407 } 408 409 void 410 config::set_pidfile(const char *fn) 411 { 412 _pidfile = string(fn); 413 } 414 415 void 416 config::push_var_table() 417 { 418 var_list *vl; 419 420 vl = new var_list(); 421 _var_list_table.push_back(vl); 422 if (Dflag) 423 fprintf(stderr, "Pushing table\n"); 424 } 425 426 void 427 config::pop_var_table() 428 { 429 delete _var_list_table.back(); 430 _var_list_table.pop_back(); 431 if (Dflag) 432 fprintf(stderr, "Popping table\n"); 433 } 434 435 void 436 config::set_variable(const char *var, const char *val) 437 { 438 _var_list_table.back()->set_variable(var, val); 439 } 440 441 const string & 442 config::get_variable(const string &var) 443 { 444 vector<var_list *>::reverse_iterator i; 445 446 for (i = _var_list_table.rbegin(); i != _var_list_table.rend(); i++) { 447 if ((*i)->is_set(var)) 448 return ((*i)->get_variable(var)); 449 } 450 return (var_list::nothing); 451 } 452 453 bool 454 config::is_id_char(char ch) 455 { 456 return (ch != '\0' && (isalpha(ch) || isdigit(ch) || ch == '_' || 457 ch == '-')); 458 } 459 460 void 461 config::expand_one(const char *&src, string &dst) 462 { 463 int count; 464 string buffer, varstr; 465 466 src++; 467 // $$ -> $ 468 if (*src == '$') { 469 dst.append(src++, 1); 470 return; 471 } 472 473 // $(foo) -> $(foo) 474 // Not sure if I want to support this or not, so for now we just pass 475 // it through. 476 if (*src == '(') { 477 dst.append("$"); 478 count = 1; 479 /* If the string ends before ) is matched , return. */ 480 while (count > 0 && *src) { 481 if (*src == ')') 482 count--; 483 else if (*src == '(') 484 count++; 485 dst.append(src++, 1); 486 } 487 return; 488 } 489 490 // ${^A-Za-z] -> $\1 491 if (!isalpha(*src)) { 492 dst.append("$"); 493 dst.append(src++, 1); 494 return; 495 } 496 497 // $var -> replace with value 498 do { 499 buffer.append(src++, 1); 500 } while (is_id_char(*src)); 501 buffer.append("", 1); 502 varstr = get_variable(buffer.c_str()); 503 dst.append(varstr); 504 } 505 506 const string 507 config::expand_string(const string &s) 508 { 509 const char *src; 510 string dst; 511 512 src = s.c_str(); 513 while (*src) { 514 if (*src == '$') 515 expand_one(src, dst); 516 else 517 dst.append(src++, 1); 518 } 519 dst.append("", 1); 520 521 return (dst); 522 } 523 524 bool 525 config::chop_var(char *&buffer, char *&lhs, char *&rhs) 526 { 527 char *walker; 528 529 if (*buffer == '\0') 530 return (false); 531 walker = lhs = buffer; 532 while (is_id_char(*walker)) 533 walker++; 534 if (*walker != '=') 535 return (false); 536 walker++; // skip = 537 if (*walker == '"') { 538 walker++; // skip " 539 rhs = walker; 540 while (*walker && *walker != '"') 541 walker++; 542 if (*walker != '"') 543 return (false); 544 rhs[-2] = '\0'; 545 *walker++ = '\0'; 546 } else { 547 rhs = walker; 548 while (*walker && !isspace(*walker)) 549 walker++; 550 if (*walker != '\0') 551 *walker++ = '\0'; 552 rhs[-1] = '\0'; 553 } 554 while (isspace(*walker)) 555 walker++; 556 buffer = walker; 557 return (true); 558 } 559 560 561 char * 562 config::set_vars(char *buffer) 563 { 564 char *lhs; 565 char *rhs; 566 567 while (1) { 568 if (!chop_var(buffer, lhs, rhs)) 569 break; 570 set_variable(lhs, rhs); 571 } 572 return (buffer); 573 } 574 575 void 576 config::find_and_execute(char type) 577 { 578 vector<event_proc *> *l; 579 vector<event_proc *>::const_iterator i; 580 char *s; 581 582 switch (type) { 583 default: 584 return; 585 case notify: 586 l = &_notify_list; 587 s = "notify"; 588 break; 589 case nomatch: 590 l = &_nomatch_list; 591 s = "nomatch"; 592 break; 593 case attach: 594 l = &_attach_list; 595 s = "attach"; 596 break; 597 case detach: 598 l = &_detach_list; 599 s = "detach"; 600 break; 601 } 602 if (Dflag) 603 fprintf(stderr, "Processing %s event\n", s); 604 for (i = l->begin(); i != l->end(); i++) { 605 if ((*i)->matches(*this)) { 606 (*i)->run(*this); 607 break; 608 } 609 } 610 611 } 612 613 614 static void 615 process_event(char *buffer) 616 { 617 char type; 618 char *sp; 619 620 sp = buffer + 1; 621 if (Dflag) 622 fprintf(stderr, "Processing event '%s'\n", buffer); 623 type = *buffer++; 624 cfg.push_var_table(); 625 // No match doesn't have a device, and the format is a little 626 // different, so handle it separately. 627 switch (type) { 628 case notify: 629 sp = cfg.set_vars(sp); 630 break; 631 case nomatch: 632 //? at location pnp-info on bus 633 sp = strchr(sp, ' '); 634 if (sp == NULL) 635 return; /* Can't happen? */ 636 *sp++ = '\0'; 637 if (strncmp(sp, "at ", 3) == 0) 638 sp += 3; 639 sp = cfg.set_vars(sp); 640 if (strncmp(sp, "on ", 3) == 0) 641 cfg.set_variable("bus", sp + 3); 642 break; 643 case attach: /*FALLTHROUGH*/ 644 case detach: 645 sp = strchr(sp, ' '); 646 if (sp == NULL) 647 return; /* Can't happen? */ 648 *sp++ = '\0'; 649 cfg.set_variable("device-name", buffer); 650 if (strncmp(sp, "at ", 3) == 0) 651 sp += 3; 652 sp = cfg.set_vars(sp); 653 if (strncmp(sp, "on ", 3) == 0) 654 cfg.set_variable("bus", sp + 3); 655 break; 656 } 657 658 cfg.find_and_execute(type); 659 cfg.pop_var_table(); 660 } 661 662 int 663 create_socket(const char *name) 664 { 665 int fd, slen; 666 struct sockaddr_un sun; 667 668 if ((fd = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0) 669 err(1, "socket"); 670 bzero(&sun, sizeof(sun)); 671 sun.sun_family = AF_UNIX; 672 strlcpy(sun.sun_path, name, sizeof(sun.sun_path)); 673 slen = SUN_LEN(&sun); 674 unlink(name); 675 if (bind(fd, (struct sockaddr *) & sun, slen) < 0) 676 err(1, "bind"); 677 listen(fd, 4); 678 fchown(fd, 0, 0); /* XXX - root.wheel */ 679 fchmod(fd, 0660); 680 return (fd); 681 } 682 683 list<int> clients; 684 685 void 686 notify_clients(const char *data, int len) 687 { 688 list<int> bad; 689 list<int>::const_iterator i; 690 691 for (i = clients.begin(); i != clients.end(); i++) { 692 if (write(*i, data, len) <= 0) { 693 bad.push_back(*i); 694 close(*i); 695 } 696 } 697 698 for (i = bad.begin(); i != bad.end(); i++) 699 clients.erase(find(clients.begin(), clients.end(), *i)); 700 } 701 702 void 703 new_client(int fd) 704 { 705 int s; 706 707 s = accept(fd, NULL, NULL); 708 if (s != -1) 709 clients.push_back(s); 710 } 711 712 static void 713 event_loop(void) 714 { 715 int rv; 716 int fd; 717 char buffer[DEVCTL_MAXBUF]; 718 int once = 0; 719 int server_fd, max_fd; 720 timeval tv; 721 fd_set fds; 722 723 fd = open(PATH_DEVCTL, O_RDONLY); 724 if (fd == -1) 725 err(1, "Can't open devctl device %s", PATH_DEVCTL); 726 if (fcntl(fd, F_SETFD, FD_CLOEXEC) != 0) 727 err(1, "Can't set close-on-exec flag on devctl"); 728 server_fd = create_socket(PIPE); 729 max_fd = max(fd, server_fd) + 1; 730 while (1) { 731 if (romeo_must_die) 732 break; 733 if (!once && !dflag && !nflag) { 734 // Check to see if we have any events pending. 735 tv.tv_sec = 0; 736 tv.tv_usec = 0; 737 FD_ZERO(&fds); 738 FD_SET(fd, &fds); 739 rv = select(fd + 1, &fds, &fds, &fds, &tv); 740 // No events -> we've processed all pending events 741 if (rv == 0) { 742 if (Dflag) 743 fprintf(stderr, "Calling daemon\n"); 744 daemon(0, 0); 745 cfg.drop_pidfile(); 746 once++; 747 } 748 } 749 FD_ZERO(&fds); 750 FD_SET(fd, &fds); 751 FD_SET(server_fd, &fds); 752 rv = select(max_fd, &fds, NULL, NULL, NULL); 753 if (rv == -1) { 754 if (errno == EINTR) 755 continue; 756 err(1, "select"); 757 } 758 if (FD_ISSET(fd, &fds)) { 759 rv = read(fd, buffer, sizeof(buffer) - 1); 760 if (rv > 0) { 761 notify_clients(buffer, rv); 762 buffer[rv] = '\0'; 763 while (buffer[--rv] == '\n') 764 buffer[rv] = '\0'; 765 process_event(buffer); 766 } else if (rv < 0) { 767 if (errno != EINTR) 768 break; 769 } else { 770 /* EOF */ 771 break; 772 } 773 } 774 if (FD_ISSET(server_fd, &fds)) 775 new_client(server_fd); 776 } 777 close(fd); 778 } 779 780 /* 781 * functions that the parser uses. 782 */ 783 void 784 add_attach(int prio, event_proc *p) 785 { 786 cfg.add_attach(prio, p); 787 } 788 789 void 790 add_detach(int prio, event_proc *p) 791 { 792 cfg.add_detach(prio, p); 793 } 794 795 void 796 add_directory(const char *dir) 797 { 798 cfg.add_directory(dir); 799 free(const_cast<char *>(dir)); 800 } 801 802 void 803 add_nomatch(int prio, event_proc *p) 804 { 805 cfg.add_nomatch(prio, p); 806 } 807 808 void 809 add_notify(int prio, event_proc *p) 810 { 811 cfg.add_notify(prio, p); 812 } 813 814 event_proc * 815 add_to_event_proc(event_proc *ep, eps *eps) 816 { 817 if (ep == NULL) 818 ep = new event_proc(); 819 ep->add(eps); 820 return (ep); 821 } 822 823 eps * 824 new_action(const char *cmd) 825 { 826 eps *e = new action(cmd); 827 free(const_cast<char *>(cmd)); 828 return (e); 829 } 830 831 eps * 832 new_match(const char *var, const char *re) 833 { 834 eps *e = new match(cfg, var, re); 835 free(const_cast<char *>(var)); 836 free(const_cast<char *>(re)); 837 return (e); 838 } 839 840 eps * 841 new_media(const char *var, const char *re) 842 { 843 eps *e = new media(cfg, var, re); 844 free(const_cast<char *>(var)); 845 free(const_cast<char *>(re)); 846 return (e); 847 } 848 849 void 850 set_pidfile(const char *name) 851 { 852 cfg.set_pidfile(name); 853 free(const_cast<char *>(name)); 854 } 855 856 void 857 set_variable(const char *var, const char *val) 858 { 859 cfg.set_variable(var, val); 860 free(const_cast<char *>(var)); 861 free(const_cast<char *>(val)); 862 } 863 864 865 866 static void 867 gensighand(int) 868 { 869 romeo_must_die++; 870 _exit(0); 871 } 872 873 static void 874 usage() 875 { 876 fprintf(stderr, "usage: %s [-Ddn]\n", getprogname()); 877 exit(1); 878 } 879 880 static void 881 check_devd_enabled() 882 { 883 int val = 0; 884 size_t len; 885 886 len = sizeof(val); 887 if (sysctlbyname(SYSCTL, &val, &len, NULL, 0) != 0) 888 errx(1, "devctl sysctl missing from kernel!"); 889 if (val) { 890 warnx("Setting " SYSCTL " to 0"); 891 val = 0; 892 sysctlbyname(SYSCTL, NULL, NULL, &val, sizeof(val)); 893 } 894 } 895 896 /* 897 * main 898 */ 899 int 900 main(int argc, char **argv) 901 { 902 int ch; 903 904 check_devd_enabled(); 905 while ((ch = getopt(argc, argv, "Ddn")) != -1) { 906 switch (ch) { 907 case 'D': 908 Dflag++; 909 break; 910 case 'd': 911 dflag++; 912 break; 913 case 'n': 914 nflag++; 915 break; 916 default: 917 usage(); 918 } 919 } 920 921 cfg.parse(); 922 if (!dflag && nflag) { 923 daemon(0, 0); 924 cfg.drop_pidfile(); 925 } 926 signal(SIGPIPE, SIG_IGN); 927 signal(SIGHUP, gensighand); 928 signal(SIGINT, gensighand); 929 signal(SIGTERM, gensighand); 930 event_loop(); 931 return (0); 932 } 933