1 /*- 2 * Copyright (c) 2002-2010 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 * my_system is a variation on lib/libc/stdlib/system.c: 27 * 28 * Copyright (c) 1988, 1993 29 * The Regents of the University of California. All rights reserved. 30 * 31 * Redistribution and use in source and binary forms, with or without 32 * modification, are permitted provided that the following conditions 33 * are met: 34 * 1. Redistributions of source code must retain the above copyright 35 * notice, this list of conditions and the following disclaimer. 36 * 2. Redistributions in binary form must reproduce the above copyright 37 * notice, this list of conditions and the following disclaimer in the 38 * documentation and/or other materials provided with the distribution. 39 * 4. Neither the name of the University nor the names of its contributors 40 * may be used to endorse or promote products derived from this software 41 * without specific prior written permission. 42 * 43 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 44 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 46 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 47 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 48 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 49 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 51 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 52 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 53 * SUCH DAMAGE. 54 */ 55 56 /* 57 * DEVD control daemon. 58 */ 59 60 // TODO list: 61 // o devd.conf and devd man pages need a lot of help: 62 // - devd needs to document the unix domain socket 63 // - devd.conf needs more details on the supported statements. 64 65 #include <sys/cdefs.h> 66 __FBSDID("$FreeBSD$"); 67 68 #include <sys/param.h> 69 #include <sys/socket.h> 70 #include <sys/stat.h> 71 #include <sys/sysctl.h> 72 #include <sys/types.h> 73 #include <sys/wait.h> 74 #include <sys/un.h> 75 76 #include <ctype.h> 77 #include <dirent.h> 78 #include <errno.h> 79 #include <err.h> 80 #include <fcntl.h> 81 #include <libutil.h> 82 #include <paths.h> 83 #include <regex.h> 84 #include <signal.h> 85 #include <stdlib.h> 86 #include <stdio.h> 87 #include <string.h> 88 #include <unistd.h> 89 90 #include <algorithm> 91 #include <map> 92 #include <string> 93 #include <list> 94 #include <vector> 95 96 #include "devd.h" /* C compatible definitions */ 97 #include "devd.hh" /* C++ class definitions */ 98 99 #define PIPE "/var/run/devd.pipe" 100 #define CF "/etc/devd.conf" 101 #define SYSCTL "hw.bus.devctl_disable" 102 103 using namespace std; 104 105 extern FILE *yyin; 106 extern int lineno; 107 108 static const char notify = '!'; 109 static const char nomatch = '?'; 110 static const char attach = '+'; 111 static const char detach = '-'; 112 113 static struct pidfh *pfh; 114 115 int Dflag; 116 int dflag; 117 int nflag; 118 int romeo_must_die = 0; 119 120 static const char *configfile = CF; 121 122 static void event_loop(void); 123 static void usage(void); 124 125 template <class T> void 126 delete_and_clear(vector<T *> &v) 127 { 128 typename vector<T *>::const_iterator i; 129 130 for (i = v.begin(); i != v.end(); i++) 131 delete *i; 132 v.clear(); 133 } 134 135 config cfg; 136 137 event_proc::event_proc() : _prio(-1) 138 { 139 // nothing 140 } 141 142 event_proc::~event_proc() 143 { 144 delete_and_clear(_epsvec); 145 } 146 147 void 148 event_proc::add(eps *eps) 149 { 150 _epsvec.push_back(eps); 151 } 152 153 bool 154 event_proc::matches(config &c) 155 { 156 vector<eps *>::const_iterator i; 157 158 for (i = _epsvec.begin(); i != _epsvec.end(); i++) 159 if (!(*i)->do_match(c)) 160 return (false); 161 return (true); 162 } 163 164 bool 165 event_proc::run(config &c) 166 { 167 vector<eps *>::const_iterator i; 168 169 for (i = _epsvec.begin(); i != _epsvec.end(); i++) 170 if (!(*i)->do_action(c)) 171 return (false); 172 return (true); 173 } 174 175 action::action(const char *cmd) 176 : _cmd(cmd) 177 { 178 // nothing 179 } 180 181 action::~action() 182 { 183 // nothing 184 } 185 186 static int 187 my_system(const char *command) 188 { 189 pid_t pid, savedpid; 190 int pstat; 191 struct sigaction ign, intact, quitact; 192 sigset_t newsigblock, oldsigblock; 193 194 if (!command) /* just checking... */ 195 return(1); 196 197 /* 198 * Ignore SIGINT and SIGQUIT, block SIGCHLD. Remember to save 199 * existing signal dispositions. 200 */ 201 ign.sa_handler = SIG_IGN; 202 ::sigemptyset(&ign.sa_mask); 203 ign.sa_flags = 0; 204 ::sigaction(SIGINT, &ign, &intact); 205 ::sigaction(SIGQUIT, &ign, &quitact); 206 ::sigemptyset(&newsigblock); 207 ::sigaddset(&newsigblock, SIGCHLD); 208 ::sigprocmask(SIG_BLOCK, &newsigblock, &oldsigblock); 209 switch (pid = ::fork()) { 210 case -1: /* error */ 211 break; 212 case 0: /* child */ 213 /* 214 * Restore original signal dispositions and exec the command. 215 */ 216 ::sigaction(SIGINT, &intact, NULL); 217 ::sigaction(SIGQUIT, &quitact, NULL); 218 ::sigprocmask(SIG_SETMASK, &oldsigblock, NULL); 219 /* 220 * Close the PID file, and all other open descriptors. 221 * Inherit std{in,out,err} only. 222 */ 223 cfg.close_pidfile(); 224 ::closefrom(3); 225 ::execl(_PATH_BSHELL, "sh", "-c", command, (char *)NULL); 226 ::_exit(127); 227 default: /* parent */ 228 savedpid = pid; 229 do { 230 pid = ::wait4(savedpid, &pstat, 0, (struct rusage *)0); 231 } while (pid == -1 && errno == EINTR); 232 break; 233 } 234 ::sigaction(SIGINT, &intact, NULL); 235 ::sigaction(SIGQUIT, &quitact, NULL); 236 ::sigprocmask(SIG_SETMASK, &oldsigblock, NULL); 237 return (pid == -1 ? -1 : pstat); 238 } 239 240 bool 241 action::do_action(config &c) 242 { 243 string s = c.expand_string(_cmd); 244 if (Dflag) 245 fprintf(stderr, "Executing '%s'\n", s.c_str()); 246 my_system(s.c_str()); 247 return (true); 248 } 249 250 match::match(config &c, const char *var, const char *re) 251 : _var(var) 252 { 253 _re = "^"; 254 _re.append(c.expand_string(string(re))); 255 _re.append("$"); 256 regcomp(&_regex, _re.c_str(), REG_EXTENDED | REG_NOSUB | REG_ICASE); 257 } 258 259 match::~match() 260 { 261 regfree(&_regex); 262 } 263 264 bool 265 match::do_match(config &c) 266 { 267 const string &value = c.get_variable(_var); 268 bool retval; 269 270 if (Dflag) 271 fprintf(stderr, "Testing %s=%s against %s\n", _var.c_str(), 272 value.c_str(), _re.c_str()); 273 274 retval = (regexec(&_regex, value.c_str(), 0, NULL, 0) == 0); 275 return retval; 276 } 277 278 #include <sys/sockio.h> 279 #include <net/if.h> 280 #include <net/if_media.h> 281 282 media::media(config &, const char *var, const char *type) 283 : _var(var), _type(-1) 284 { 285 static struct ifmedia_description media_types[] = { 286 { IFM_ETHER, "Ethernet" }, 287 { IFM_TOKEN, "Tokenring" }, 288 { IFM_FDDI, "FDDI" }, 289 { IFM_IEEE80211, "802.11" }, 290 { IFM_ATM, "ATM" }, 291 { IFM_CARP, "CARP" }, 292 { -1, "unknown" }, 293 { 0, NULL }, 294 }; 295 for (int i = 0; media_types[i].ifmt_string != NULL; i++) 296 if (strcasecmp(type, media_types[i].ifmt_string) == 0) { 297 _type = media_types[i].ifmt_word; 298 break; 299 } 300 } 301 302 media::~media() 303 { 304 } 305 306 bool 307 media::do_match(config &c) 308 { 309 string value; 310 struct ifmediareq ifmr; 311 bool retval; 312 int s; 313 314 // Since we can be called from both a device attach/detach 315 // context where device-name is defined and what we want, 316 // as well as from a link status context, where subsystem is 317 // the name of interest, first try device-name and fall back 318 // to subsystem if none exists. 319 value = c.get_variable("device-name"); 320 if (value.length() == 0) 321 value = c.get_variable("subsystem"); 322 if (Dflag) 323 fprintf(stderr, "Testing media type of %s against 0x%x\n", 324 value.c_str(), _type); 325 326 retval = false; 327 328 s = socket(PF_INET, SOCK_DGRAM, 0); 329 if (s >= 0) { 330 memset(&ifmr, 0, sizeof(ifmr)); 331 strncpy(ifmr.ifm_name, value.c_str(), sizeof(ifmr.ifm_name)); 332 333 if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) >= 0 && 334 ifmr.ifm_status & IFM_AVALID) { 335 if (Dflag) 336 fprintf(stderr, "%s has media type 0x%x\n", 337 value.c_str(), IFM_TYPE(ifmr.ifm_active)); 338 retval = (IFM_TYPE(ifmr.ifm_active) == _type); 339 } else if (_type == -1) { 340 if (Dflag) 341 fprintf(stderr, "%s has unknown media type\n", 342 value.c_str()); 343 retval = true; 344 } 345 close(s); 346 } 347 348 return retval; 349 } 350 351 const string var_list::bogus = "_$_$_$_$_B_O_G_U_S_$_$_$_$_"; 352 const string var_list::nothing = ""; 353 354 const string & 355 var_list::get_variable(const string &var) const 356 { 357 map<string, string>::const_iterator i; 358 359 i = _vars.find(var); 360 if (i == _vars.end()) 361 return (var_list::bogus); 362 return (i->second); 363 } 364 365 bool 366 var_list::is_set(const string &var) const 367 { 368 return (_vars.find(var) != _vars.end()); 369 } 370 371 void 372 var_list::set_variable(const string &var, const string &val) 373 { 374 if (Dflag) 375 fprintf(stderr, "setting %s=%s\n", var.c_str(), val.c_str()); 376 _vars[var] = val; 377 } 378 379 void 380 config::reset(void) 381 { 382 _dir_list.clear(); 383 delete_and_clear(_var_list_table); 384 delete_and_clear(_attach_list); 385 delete_and_clear(_detach_list); 386 delete_and_clear(_nomatch_list); 387 delete_and_clear(_notify_list); 388 } 389 390 void 391 config::parse_one_file(const char *fn) 392 { 393 if (Dflag) 394 fprintf(stderr, "Parsing %s\n", fn); 395 yyin = fopen(fn, "r"); 396 if (yyin == NULL) 397 err(1, "Cannot open config file %s", fn); 398 lineno = 1; 399 if (yyparse() != 0) 400 errx(1, "Cannot parse %s at line %d", fn, lineno); 401 fclose(yyin); 402 } 403 404 void 405 config::parse_files_in_dir(const char *dirname) 406 { 407 DIR *dirp; 408 struct dirent *dp; 409 char path[PATH_MAX]; 410 411 if (Dflag) 412 fprintf(stderr, "Parsing files in %s\n", dirname); 413 dirp = opendir(dirname); 414 if (dirp == NULL) 415 return; 416 readdir(dirp); /* Skip . */ 417 readdir(dirp); /* Skip .. */ 418 while ((dp = readdir(dirp)) != NULL) { 419 if (strcmp(dp->d_name + dp->d_namlen - 5, ".conf") == 0) { 420 snprintf(path, sizeof(path), "%s/%s", 421 dirname, dp->d_name); 422 parse_one_file(path); 423 } 424 } 425 closedir(dirp); 426 } 427 428 class epv_greater { 429 public: 430 int operator()(event_proc *const&l1, event_proc *const&l2) 431 { 432 return (l1->get_priority() > l2->get_priority()); 433 } 434 }; 435 436 void 437 config::sort_vector(vector<event_proc *> &v) 438 { 439 sort(v.begin(), v.end(), epv_greater()); 440 } 441 442 void 443 config::parse(void) 444 { 445 vector<string>::const_iterator i; 446 447 parse_one_file(configfile); 448 for (i = _dir_list.begin(); i != _dir_list.end(); i++) 449 parse_files_in_dir((*i).c_str()); 450 sort_vector(_attach_list); 451 sort_vector(_detach_list); 452 sort_vector(_nomatch_list); 453 sort_vector(_notify_list); 454 } 455 456 void 457 config::open_pidfile() 458 { 459 pid_t otherpid; 460 461 if (_pidfile == "") 462 return; 463 pfh = pidfile_open(_pidfile.c_str(), 0600, &otherpid); 464 if (pfh == NULL) { 465 if (errno == EEXIST) 466 errx(1, "devd already running, pid: %d", (int)otherpid); 467 warn("cannot open pid file"); 468 } 469 } 470 471 void 472 config::write_pidfile() 473 { 474 475 pidfile_write(pfh); 476 } 477 478 void 479 config::close_pidfile() 480 { 481 482 pidfile_close(pfh); 483 } 484 485 void 486 config::remove_pidfile() 487 { 488 489 pidfile_remove(pfh); 490 } 491 492 void 493 config::add_attach(int prio, event_proc *p) 494 { 495 p->set_priority(prio); 496 _attach_list.push_back(p); 497 } 498 499 void 500 config::add_detach(int prio, event_proc *p) 501 { 502 p->set_priority(prio); 503 _detach_list.push_back(p); 504 } 505 506 void 507 config::add_directory(const char *dir) 508 { 509 _dir_list.push_back(string(dir)); 510 } 511 512 void 513 config::add_nomatch(int prio, event_proc *p) 514 { 515 p->set_priority(prio); 516 _nomatch_list.push_back(p); 517 } 518 519 void 520 config::add_notify(int prio, event_proc *p) 521 { 522 p->set_priority(prio); 523 _notify_list.push_back(p); 524 } 525 526 void 527 config::set_pidfile(const char *fn) 528 { 529 _pidfile = string(fn); 530 } 531 532 void 533 config::push_var_table() 534 { 535 var_list *vl; 536 537 vl = new var_list(); 538 _var_list_table.push_back(vl); 539 if (Dflag) 540 fprintf(stderr, "Pushing table\n"); 541 } 542 543 void 544 config::pop_var_table() 545 { 546 delete _var_list_table.back(); 547 _var_list_table.pop_back(); 548 if (Dflag) 549 fprintf(stderr, "Popping table\n"); 550 } 551 552 void 553 config::set_variable(const char *var, const char *val) 554 { 555 _var_list_table.back()->set_variable(var, val); 556 } 557 558 const string & 559 config::get_variable(const string &var) 560 { 561 vector<var_list *>::reverse_iterator i; 562 563 for (i = _var_list_table.rbegin(); i != _var_list_table.rend(); i++) { 564 if ((*i)->is_set(var)) 565 return ((*i)->get_variable(var)); 566 } 567 return (var_list::nothing); 568 } 569 570 bool 571 config::is_id_char(char ch) 572 { 573 return (ch != '\0' && (isalpha(ch) || isdigit(ch) || ch == '_' || 574 ch == '-')); 575 } 576 577 void 578 config::expand_one(const char *&src, string &dst) 579 { 580 int count; 581 string buffer; 582 583 src++; 584 // $$ -> $ 585 if (*src == '$') { 586 dst.append(src++, 1); 587 return; 588 } 589 590 // $(foo) -> $(foo) 591 // Not sure if I want to support this or not, so for now we just pass 592 // it through. 593 if (*src == '(') { 594 dst.append("$"); 595 count = 1; 596 /* If the string ends before ) is matched , return. */ 597 while (count > 0 && *src) { 598 if (*src == ')') 599 count--; 600 else if (*src == '(') 601 count++; 602 dst.append(src++, 1); 603 } 604 return; 605 } 606 607 // ${^A-Za-z] -> $\1 608 if (!isalpha(*src)) { 609 dst.append("$"); 610 dst.append(src++, 1); 611 return; 612 } 613 614 // $var -> replace with value 615 do { 616 buffer.append(src++, 1); 617 } while (is_id_char(*src)); 618 buffer.append("", 1); 619 dst.append(get_variable(buffer.c_str())); 620 } 621 622 const string 623 config::expand_string(const string &s) 624 { 625 const char *src; 626 string dst; 627 628 src = s.c_str(); 629 while (*src) { 630 if (*src == '$') 631 expand_one(src, dst); 632 else 633 dst.append(src++, 1); 634 } 635 dst.append("", 1); 636 637 return (dst); 638 } 639 640 bool 641 config::chop_var(char *&buffer, char *&lhs, char *&rhs) 642 { 643 char *walker; 644 645 if (*buffer == '\0') 646 return (false); 647 walker = lhs = buffer; 648 while (is_id_char(*walker)) 649 walker++; 650 if (*walker != '=') 651 return (false); 652 walker++; // skip = 653 if (*walker == '"') { 654 walker++; // skip " 655 rhs = walker; 656 while (*walker && *walker != '"') 657 walker++; 658 if (*walker != '"') 659 return (false); 660 rhs[-2] = '\0'; 661 *walker++ = '\0'; 662 } else { 663 rhs = walker; 664 while (*walker && !isspace(*walker)) 665 walker++; 666 if (*walker != '\0') 667 *walker++ = '\0'; 668 rhs[-1] = '\0'; 669 } 670 while (isspace(*walker)) 671 walker++; 672 buffer = walker; 673 return (true); 674 } 675 676 677 char * 678 config::set_vars(char *buffer) 679 { 680 char *lhs; 681 char *rhs; 682 683 while (1) { 684 if (!chop_var(buffer, lhs, rhs)) 685 break; 686 set_variable(lhs, rhs); 687 } 688 return (buffer); 689 } 690 691 void 692 config::find_and_execute(char type) 693 { 694 vector<event_proc *> *l; 695 vector<event_proc *>::const_iterator i; 696 const char *s; 697 698 switch (type) { 699 default: 700 return; 701 case notify: 702 l = &_notify_list; 703 s = "notify"; 704 break; 705 case nomatch: 706 l = &_nomatch_list; 707 s = "nomatch"; 708 break; 709 case attach: 710 l = &_attach_list; 711 s = "attach"; 712 break; 713 case detach: 714 l = &_detach_list; 715 s = "detach"; 716 break; 717 } 718 if (Dflag) 719 fprintf(stderr, "Processing %s event\n", s); 720 for (i = l->begin(); i != l->end(); i++) { 721 if ((*i)->matches(*this)) { 722 (*i)->run(*this); 723 break; 724 } 725 } 726 727 } 728 729 730 static void 731 process_event(char *buffer) 732 { 733 char type; 734 char *sp; 735 736 sp = buffer + 1; 737 if (Dflag) 738 fprintf(stderr, "Processing event '%s'\n", buffer); 739 type = *buffer++; 740 cfg.push_var_table(); 741 // No match doesn't have a device, and the format is a little 742 // different, so handle it separately. 743 switch (type) { 744 case notify: 745 sp = cfg.set_vars(sp); 746 break; 747 case nomatch: 748 //? at location pnp-info on bus 749 sp = strchr(sp, ' '); 750 if (sp == NULL) 751 return; /* Can't happen? */ 752 *sp++ = '\0'; 753 while (isspace(*sp)) 754 sp++; 755 if (strncmp(sp, "at ", 3) == 0) 756 sp += 3; 757 sp = cfg.set_vars(sp); 758 while (isspace(*sp)) 759 sp++; 760 if (strncmp(sp, "on ", 3) == 0) 761 cfg.set_variable("bus", sp + 3); 762 break; 763 case attach: /*FALLTHROUGH*/ 764 case detach: 765 sp = strchr(sp, ' '); 766 if (sp == NULL) 767 return; /* Can't happen? */ 768 *sp++ = '\0'; 769 cfg.set_variable("device-name", buffer); 770 while (isspace(*sp)) 771 sp++; 772 if (strncmp(sp, "at ", 3) == 0) 773 sp += 3; 774 sp = cfg.set_vars(sp); 775 while (isspace(*sp)) 776 sp++; 777 if (strncmp(sp, "on ", 3) == 0) 778 cfg.set_variable("bus", sp + 3); 779 break; 780 } 781 782 cfg.find_and_execute(type); 783 cfg.pop_var_table(); 784 } 785 786 int 787 create_socket(const char *name) 788 { 789 int fd, slen; 790 struct sockaddr_un sun; 791 792 if ((fd = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0) 793 err(1, "socket"); 794 bzero(&sun, sizeof(sun)); 795 sun.sun_family = AF_UNIX; 796 strlcpy(sun.sun_path, name, sizeof(sun.sun_path)); 797 slen = SUN_LEN(&sun); 798 unlink(name); 799 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) 800 err(1, "fcntl"); 801 if (bind(fd, (struct sockaddr *) & sun, slen) < 0) 802 err(1, "bind"); 803 listen(fd, 4); 804 chown(name, 0, 0); /* XXX - root.wheel */ 805 chmod(name, 0666); 806 return (fd); 807 } 808 809 list<int> clients; 810 811 void 812 notify_clients(const char *data, int len) 813 { 814 list<int> bad; 815 list<int>::const_iterator i; 816 817 for (i = clients.begin(); i != clients.end(); i++) { 818 if (write(*i, data, len) <= 0) { 819 bad.push_back(*i); 820 close(*i); 821 } 822 } 823 824 for (i = bad.begin(); i != bad.end(); i++) 825 clients.erase(find(clients.begin(), clients.end(), *i)); 826 } 827 828 void 829 new_client(int fd) 830 { 831 int s; 832 833 s = accept(fd, NULL, NULL); 834 if (s != -1) 835 clients.push_back(s); 836 } 837 838 static void 839 event_loop(void) 840 { 841 int rv; 842 int fd; 843 char buffer[DEVCTL_MAXBUF]; 844 int once = 0; 845 int server_fd, max_fd; 846 timeval tv; 847 fd_set fds; 848 849 fd = open(PATH_DEVCTL, O_RDONLY); 850 if (fd == -1) 851 err(1, "Can't open devctl device %s", PATH_DEVCTL); 852 if (fcntl(fd, F_SETFD, FD_CLOEXEC) != 0) 853 err(1, "Can't set close-on-exec flag on devctl"); 854 server_fd = create_socket(PIPE); 855 max_fd = max(fd, server_fd) + 1; 856 while (1) { 857 if (romeo_must_die) 858 break; 859 if (!once && !dflag && !nflag) { 860 // Check to see if we have any events pending. 861 tv.tv_sec = 0; 862 tv.tv_usec = 0; 863 FD_ZERO(&fds); 864 FD_SET(fd, &fds); 865 rv = select(fd + 1, &fds, &fds, &fds, &tv); 866 // No events -> we've processed all pending events 867 if (rv == 0) { 868 if (Dflag) 869 fprintf(stderr, "Calling daemon\n"); 870 cfg.remove_pidfile(); 871 cfg.open_pidfile(); 872 daemon(0, 0); 873 cfg.write_pidfile(); 874 once++; 875 } 876 } 877 FD_ZERO(&fds); 878 FD_SET(fd, &fds); 879 FD_SET(server_fd, &fds); 880 rv = select(max_fd, &fds, NULL, NULL, NULL); 881 if (rv == -1) { 882 if (errno == EINTR) 883 continue; 884 err(1, "select"); 885 } 886 if (FD_ISSET(fd, &fds)) { 887 rv = read(fd, buffer, sizeof(buffer) - 1); 888 if (rv > 0) { 889 notify_clients(buffer, rv); 890 buffer[rv] = '\0'; 891 while (buffer[--rv] == '\n') 892 buffer[rv] = '\0'; 893 process_event(buffer); 894 } else if (rv < 0) { 895 if (errno != EINTR) 896 break; 897 } else { 898 /* EOF */ 899 break; 900 } 901 } 902 if (FD_ISSET(server_fd, &fds)) 903 new_client(server_fd); 904 } 905 close(fd); 906 } 907 908 /* 909 * functions that the parser uses. 910 */ 911 void 912 add_attach(int prio, event_proc *p) 913 { 914 cfg.add_attach(prio, p); 915 } 916 917 void 918 add_detach(int prio, event_proc *p) 919 { 920 cfg.add_detach(prio, p); 921 } 922 923 void 924 add_directory(const char *dir) 925 { 926 cfg.add_directory(dir); 927 free(const_cast<char *>(dir)); 928 } 929 930 void 931 add_nomatch(int prio, event_proc *p) 932 { 933 cfg.add_nomatch(prio, p); 934 } 935 936 void 937 add_notify(int prio, event_proc *p) 938 { 939 cfg.add_notify(prio, p); 940 } 941 942 event_proc * 943 add_to_event_proc(event_proc *ep, eps *eps) 944 { 945 if (ep == NULL) 946 ep = new event_proc(); 947 ep->add(eps); 948 return (ep); 949 } 950 951 eps * 952 new_action(const char *cmd) 953 { 954 eps *e = new action(cmd); 955 free(const_cast<char *>(cmd)); 956 return (e); 957 } 958 959 eps * 960 new_match(const char *var, const char *re) 961 { 962 eps *e = new match(cfg, var, re); 963 free(const_cast<char *>(var)); 964 free(const_cast<char *>(re)); 965 return (e); 966 } 967 968 eps * 969 new_media(const char *var, const char *re) 970 { 971 eps *e = new media(cfg, var, re); 972 free(const_cast<char *>(var)); 973 free(const_cast<char *>(re)); 974 return (e); 975 } 976 977 void 978 set_pidfile(const char *name) 979 { 980 cfg.set_pidfile(name); 981 free(const_cast<char *>(name)); 982 } 983 984 void 985 set_variable(const char *var, const char *val) 986 { 987 cfg.set_variable(var, val); 988 free(const_cast<char *>(var)); 989 free(const_cast<char *>(val)); 990 } 991 992 993 994 static void 995 gensighand(int) 996 { 997 romeo_must_die++; 998 _exit(0); 999 } 1000 1001 static void 1002 usage() 1003 { 1004 fprintf(stderr, "usage: %s [-Ddn] [-f file]\n", getprogname()); 1005 exit(1); 1006 } 1007 1008 static void 1009 check_devd_enabled() 1010 { 1011 int val = 0; 1012 size_t len; 1013 1014 len = sizeof(val); 1015 if (sysctlbyname(SYSCTL, &val, &len, NULL, 0) != 0) 1016 errx(1, "devctl sysctl missing from kernel!"); 1017 if (val) { 1018 warnx("Setting " SYSCTL " to 0"); 1019 val = 0; 1020 sysctlbyname(SYSCTL, NULL, NULL, &val, sizeof(val)); 1021 } 1022 } 1023 1024 /* 1025 * main 1026 */ 1027 int 1028 main(int argc, char **argv) 1029 { 1030 int ch; 1031 1032 check_devd_enabled(); 1033 while ((ch = getopt(argc, argv, "Ddf:n")) != -1) { 1034 switch (ch) { 1035 case 'D': 1036 Dflag++; 1037 break; 1038 case 'd': 1039 dflag++; 1040 break; 1041 case 'f': 1042 configfile = optarg; 1043 break; 1044 case 'n': 1045 nflag++; 1046 break; 1047 default: 1048 usage(); 1049 } 1050 } 1051 1052 cfg.parse(); 1053 if (!dflag && nflag) { 1054 cfg.open_pidfile(); 1055 daemon(0, 0); 1056 cfg.write_pidfile(); 1057 } 1058 signal(SIGPIPE, SIG_IGN); 1059 signal(SIGHUP, gensighand); 1060 signal(SIGINT, gensighand); 1061 signal(SIGTERM, gensighand); 1062 event_loop(); 1063 return (0); 1064 } 1065