src/main/radiusd.c

   1 /*
   2  * radiusd.c    Main loop of the radius server.
   3  *
   4  * Version:     $Id$
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  * Copyright 2000,2001,2002,2003,2004  The FreeRADIUS server project
  21  * Copyright 1999,2000  Miquel van Smoorenburg <miquels@cistron.nl>
  22  * Copyright 2000  Alan DeKok <aland@ox.org>
  23  * Copyright 2000  Alan Curry <pacman-radius@cqc.com>
  24  * Copyright 2000  Jeff Carneal <jeff@apex.net>
  25  * Copyright 2000  Chad Miller <cmiller@surfsouth.com>
  26  */
  27
  28 /* don't look here for the version, run radiusd -v or look in version.c */
  29 static const char rcsid[] =
  30 "$Id$";
  31
  32 #include "autoconf.h"
  33
  34 #include <sys/file.h>
  35
  36 #ifdef HAVE_NETINET_IN_H
  37 #       include <netinet/in.h>
  38 #endif
  39
  40 #include <stdlib.h>
  41 #include <string.h>
  42 #include <fcntl.h>
  43 #include <ctype.h>
  44
  45 #ifdef HAVE_UNISTD_H
  46 #       include <unistd.h>
  47 #endif
  48
  49 #include <signal.h>
  50
  51 #ifdef HAVE_GETOPT_H
  52 #       include <getopt.h>
  53 #endif
  54
  55 #ifdef HAVE_SYS_SELECT_H
  56 #       include <sys/select.h>
  57 #endif
  58
  59 #ifdef HAVE_SYS_WAIT_H
  60 #       include <sys/wait.h>
  61 #endif
  62 #ifndef WEXITSTATUS
  63 #       define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
  64 #endif
  65 #ifndef WIFEXITED
  66 #       define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
  67 #endif
  68
  69 #include "radiusd.h"
  70 #include "rad_assert.h"
  71 #include "conffile.h"
  72 #include "modules.h"
  73 #include "request_list.h"
  74 #include "radius_snmp.h"
  75
  76 #define SLEEP_FOREVER (65536)
  77
  78 /*
  79  *  Global variables.
  80  */
  81 const char *progname = NULL;
  82 const char *radius_dir = NULL;
  83 const char *radacct_dir = NULL;
  84 const char *radlog_dir = NULL;
  85 const char *radlib_dir = NULL;
  86 int log_stripped_names;
  87 int debug_flag = 0;
  88 int log_auth_detail = FALSE;
  89 int need_reload = FALSE;
  90 const char *radiusd_version = "FreeRADIUS Version " RADIUSD_VERSION ", for host " HOSTINFO ", built on " __DATE__ " at " __TIME__;
  91
  92 time_t time_now;
  93 static pid_t radius_pid;
  94
  95 /*
  96  *  Configuration items.
  97  */
  98 static int do_exit = 0;
  99
 100 /*
 101  *      Static functions.
 102  */
 103 static void usage(int);
 104
 105 static void sig_fatal (int);
 106 static void sig_hup (int);
 107
 108 /*
 109  *      The main guy.
 110  */
 111 int main(int argc, char *argv[])
 112 {
 113         REQUEST *request;
 114         unsigned char buffer[4096];
 115         fd_set readfds;
 116         int argval;
 117         int pid;
 118         int max_fd;
 119         int status;
 120         int sleep_time = SLEEP_FOREVER;
 121         int spawn_flag = TRUE;
 122         int dont_fork = FALSE;
 123         int sig_hup_block = FALSE;
 124         time_t last_cleaned_lists = 0;
 125
 126 #ifdef HAVE_SIGACTION
 127         struct sigaction act;
 128 #endif
 129         rad_listen_t *listener;
 130
 131 #ifdef OSFC2
 132         set_auth_parameters(argc,argv);
 133 #endif
 134
 135         if ((progname = strrchr(argv[0], '/')) == NULL)
 136                 progname = argv[0];
 137         else
 138                 progname++;
 139
 140         debug_flag = 0;
 141         spawn_flag = TRUE;
 142         radius_dir = strdup(RADIUS_DIR);
 143
 144         /*
 145          *      Ensure that the configuration is initialized.
 146          */
 147         memset(&mainconfig, 0, sizeof(mainconfig));
 148         mainconfig.myip.af = AF_UNSPEC;
 149         mainconfig.port = -1;
 150         mainconfig.radiusd_conf = "radiusd.conf";
 151
 152 #ifdef HAVE_SIGACTION
 153         memset(&act, 0, sizeof(act));
 154         act.sa_flags = 0 ;
 155         sigemptyset( &act.sa_mask ) ;
 156 #endif
 157
 158         /*  Process the options.  */
 159         while ((argval = getopt(argc, argv, "Aa:bcd:fg:hi:l:n:p:sSvxXyz")) != EOF) {
 160
 161                 switch(argval) {
 162
 163                         case 'A':
 164                                 log_auth_detail = TRUE;
 165                                 break;
 166
 167                         case 'a':
 168                                 if (radacct_dir) free(radacct_dir);
 169                                 radacct_dir = strdup(optarg);
 170                                 break;
 171
 172                         case 'c':
 173                                 /* ignore for backwards compatibility with Cistron */
 174                                 break;
 175
 176                         case 'd':
 177                                 if (radius_dir) free(radius_dir);
 178                                 radius_dir = strdup(optarg);
 179                                 break;
 180
 181                         case 'f':
 182                                 dont_fork = TRUE;
 183                                 break;
 184
 185                         case 'h':
 186                                 usage(0);
 187                                 break;
 188
 189                         case 'i':
 190                                 if (ip_hton(optarg, AF_UNSPEC, &mainconfig.myip) < 0) {
 191                                         fprintf(stderr, "radiusd: Invalid IP Address or hostname \"%s\"\n", optarg);
 192                                         exit(1);
 193                                 }
 194                                 break;
 195
 196                         case 'l':
 197                                 if ((strcmp(optarg, "stdout") == 0) ||
 198                                     (strcmp(optarg, "stderr") == 0) ||
 199                                     (strcmp(optarg, "syslog") == 0)) {
 200                                         fprintf(stderr, "radiusd: -l %s is unsupported.  Use log_destination in radiusd.conf\n", optarg);
 201                                         exit(1);
 202                                 }
 203                                 radlog_dir = strdup(optarg);
 204                                 break;
 205
 206                         case 'g':
 207                                 fprintf(stderr, "radiusd: -g is unsupported.  Use log_destination in radiusd.conf.\n");
 208                                 exit(1);
 209                                 break;
 210
 211                         case 'n':
 212                                 if ((strchr(optarg, '/') != NULL) ||
 213                                     (strchr(optarg, '.') != NULL) ||
 214                                     (strlen(optarg) > 45)) usage(1);
 215
 216                                 snprintf(buffer, sizeof(buffer), "%s.conf",
 217                                          optarg);
 218                                 mainconfig.radiusd_conf = strdup(buffer);
 219                                 break;
 220
 221                         case 'S':
 222                                 log_stripped_names++;
 223                                 break;
 224
 225                         case 'p':
 226                                 mainconfig.port = atoi(optarg);
 227                                 if ((mainconfig.port <= 0) ||
 228                                     (mainconfig.port >= 65536)) {
 229                                         fprintf(stderr, "radiusd: Invalid port number %s\n", optarg);
 230                                         exit(1);
 231                                 }
 232                                 break;
 233
 234                         case 's':       /* Single process mode */
 235                                 spawn_flag = FALSE;
 236                                 dont_fork = TRUE;
 237                                 break;
 238
 239                         case 'v':
 240                                 version();
 241                                 break;
 242
 243                                 /*
 244                                  *  BIG debugging mode for users who are
 245                                  *  TOO LAZY to type '-sfxxyz -l stdout' themselves.
 246                                  */
 247                         case 'X':
 248                                 spawn_flag = FALSE;
 249                                 dont_fork = TRUE;
 250                                 debug_flag += 2;
 251                                 mainconfig.log_auth = TRUE;
 252                                 mainconfig.log_auth_badpass = TRUE;
 253                                 mainconfig.log_auth_goodpass = TRUE;
 254                                 mainconfig.radlog_dest = RADLOG_STDOUT;
 255                                 break;
 256
 257                         case 'x':
 258                                 debug_flag++;
 259                                 break;
 260
 261                         case 'y':
 262                                 mainconfig.log_auth = TRUE;
 263                                 mainconfig.log_auth_badpass = TRUE;
 264                                 break;
 265
 266                         case 'z':
 267                                 mainconfig.log_auth_badpass = TRUE;
 268                                 mainconfig.log_auth_goodpass = TRUE;
 269                                 break;
 270
 271                         default:
 272                                 usage(1);
 273                                 break;
 274                 }
 275         }
 276
 277         /*  Read the configuration files, BEFORE doing anything else.  */
 278         if (read_mainconfig(0) < 0) {
 279                 exit(1);
 280         }
 281
 282         /*
 283          *  Disconnect from session
 284          */
 285         if (debug_flag == 0 && dont_fork == FALSE) {
 286                 pid = fork();
 287                 if(pid < 0) {
 288                         radlog(L_ERR|L_CONS, "Couldn't fork");
 289                         exit(1);
 290                 }
 291
 292                 /*
 293                  *  The parent exits, so the child can run in the background.
 294                  */
 295                 if (pid > 0) {
 296                         exit(0);
 297                 }
 298 #ifdef HAVE_SETSID
 299                 setsid();
 300 #endif
 301         }
 302
 303         /*
 304          *      If we're NOT debugging, trap fatal signals, so we can
 305          *      easily clean up after ourselves.
 306          *
 307          *      If we ARE debugging, don't trap them, so we can
 308          *      dump core.
 309          */
 310         if ((mainconfig.allow_core_dumps == FALSE) && (debug_flag == 0)) {
 311 #ifdef SIGSEGV
 312 #ifdef HAVE_SIGACTION
 313                 act.sa_handler = sig_fatal;
 314                 sigaction(SIGSEGV, &act, NULL);
 315 #else
 316                 signal(SIGSEGV, sig_fatal);
 317 #endif
 318 #endif
 319         }
 320
 321 #ifdef WITH_SNMP
 322         if (mainconfig.do_snmp) radius_snmp_init();
 323 #endif
 324
 325         /*
 326          *  Ensure that we're using the CORRECT pid after forking,
 327          *  NOT the one we started with.
 328          */
 329         radius_pid = getpid();
 330
 331
 332         /*
 333          *  Only write the PID file if we're running as a daemon.
 334          *
 335          *  And write it AFTER we've forked, so that we write the
 336          *  correct PID.
 337          */
 338         if (dont_fork == FALSE) {
 339                 FILE *fp;
 340
 341                 fp = fopen(mainconfig.pid_file, "w");
 342                 if (fp != NULL) {
 343                         /*
 344                          *      FIXME: What about following symlinks,
 345                          *      and having it over-write a normal file?
 346                          */
 347                         fprintf(fp, "%d\n", (int) radius_pid);
 348                         fclose(fp);
 349                 } else {
 350                         radlog(L_ERR|L_CONS, "Failed creating PID file %s: %s\n",
 351                                mainconfig.pid_file, strerror(errno));
 352                         exit(1);
 353                 }
 354         }
 355
 356         /*
 357          *      If we're running as a daemon, close the default file
 358          *      descriptors, AFTER forking.
 359          */
 360         mainconfig.radlog_fd = -1;
 361         if (debug_flag) {
 362                 mainconfig.radlog_fd = STDOUT_FILENO;
 363         } else {
 364                 int devnull;
 365
 366                 devnull = open("/dev/null", O_RDWR);
 367                 if (devnull < 0) {
 368                         radlog(L_ERR|L_CONS, "Failed opening /dev/null: %s\n",
 369                                strerror(errno));
 370                         exit(1);
 371                 }
 372                 dup2(devnull, STDIN_FILENO);
 373                 if (mainconfig.radlog_dest == RADLOG_STDOUT) {
 374                         mainconfig.radlog_fd = dup(STDOUT_FILENO);
 375                 }
 376                 dup2(devnull, STDOUT_FILENO);
 377                 if (mainconfig.radlog_dest == RADLOG_STDERR) {
 378                         mainconfig.radlog_fd = dup(STDERR_FILENO);
 379                 }
 380                 dup2(devnull, STDERR_FILENO);
 381                 close(devnull);
 382         }
 383
 384         /*
 385          *      It's called the thread pool, but it does a little
 386          *      more than that.
 387          */
 388         thread_pool_init(spawn_flag);
 389
 390         /*
 391          *  Use linebuffered or unbuffered stdout if
 392          *  the debug flag is on.
 393          */
 394         if (debug_flag == TRUE)
 395                 setlinebuf(stdout);
 396
 397         /*
 398          *      Print out which ports we're listening on.
 399          */
 400         for (listener = mainconfig.listen;
 401              listener != NULL;
 402              listener = listener->next) {
 403                 listener->print(listener, buffer, sizeof(buffer));
 404                 switch (listener->type) {
 405                 case RAD_LISTEN_AUTH:
 406                         DEBUG("Listening on authentication address %s", buffer);
 407                         break;
 408
 409                 case RAD_LISTEN_ACCT:
 410                         DEBUG("Listening on accounting address %s", buffer);
 411                         break;
 412
 413                 case RAD_LISTEN_PROXY:
 414                         DEBUG("Listening on proxy address %s", buffer);
 415                         break;
 416
 417                 case RAD_LISTEN_DETAIL:
 418                         DEBUG("Listening on detail file %s", buffer);
 419                         break;
 420
 421                 default:
 422                         break;
 423                 }
 424         }
 425
 426         /*
 427          *      Now that we've set everything up, we can install the signal
 428          *      handlers.  Before this, if we get any signal, we don't know
 429          *      what to do, so we might as well do the default, and die.
 430          */
 431         signal(SIGPIPE, SIG_IGN);
 432 #ifdef HAVE_SIGACTION
 433         act.sa_handler = sig_hup;
 434         sigaction(SIGHUP, &act, NULL);
 435         act.sa_handler = sig_fatal;
 436         sigaction(SIGTERM, &act, NULL);
 437 #else
 438         signal(SIGHUP, sig_hup);
 439         signal(SIGTERM, sig_fatal);
 440 #endif
 441         /*
 442          *      If we're debugging, then a CTRL-C will cause the
 443          *      server to die immediately.  Use SIGTERM to shut down
 444          *      the server cleanly in that case.
 445          */
 446         if (debug_flag == 0) {
 447 #ifdef HAVE_SIGACTION
 448                 act.sa_handler = sig_fatal;
 449                 sigaction(SIGINT, &act, NULL);
 450                 sigaction(SIGQUIT, &act, NULL);
 451 #else
 452                 signal(SIGINT, sig_fatal);
 453                 signal(SIGQUIT, sig_fatal);
 454 #endif
 455         }
 456
 457         radlog(L_INFO, "Ready to process requests.");
 458
 459         /*
 460          *  Receive user requests
 461          */
 462         for (;;) {
 463                 /*
 464                  *      If we've been told to exit, then do so,
 465                  *      even if we have data waiting.
 466                  */
 467                 if (do_exit) {
 468                         DEBUG("Exiting...");
 469
 470                         /*
 471                          *      Ignore the TERM signal: we're about
 472                          *      to die.
 473                          */
 474                         signal(SIGTERM, SIG_IGN);
 475
 476                         /*
 477                          *      Send a TERM signal to all associated
 478                          *      processes (including us, which gets
 479                          *      ignored.)
 480                          */
 481                         kill(-radius_pid, SIGTERM);
 482
 483                         /*
 484                          *      FIXME: Kill child threads, and
 485                          *      clean up?
 486                          */
 487
 488                         /*
 489                          *      Detach any modules.
 490                          */
 491                         detach_modules();
 492
 493                         /*
 494                          *      FIXME: clean up any active REQUEST
 495                          *      handles.
 496                          */
 497
 498                         /*
 499                          *      We're exiting, so we can delete the PID
 500                          *      file.  (If it doesn't exist, we can ignore
 501                          *      the error returned by unlink)
 502                          */
 503                         if (dont_fork == FALSE) {
 504                                 unlink(mainconfig.pid_file);
 505                         }
 506
 507                         /*
 508                          *      Free the configuration items.
 509                          */
 510                         free_mainconfig();
 511
 512                         /*
 513                          *      SIGTERM gets do_exit=0,
 514                          *      and we want to exit cleanly.
 515                          *
 516                          *      Other signals make us exit
 517                          *      with an error status.
 518                          */
 519                         exit(do_exit - 1);
 520                 }
 521
 522                 if (need_reload) {
 523 #ifdef HAVE_PTHREAD_H
 524                         /*
 525                          *      Threads: wait for all threads to stop
 526                          *      processing before re-loading the
 527                          *      config, so we don't pull the rug out
 528                          *      from under them.
 529                          */
 530                         int max_wait = 0;
 531                         if (!spawn_flag) for(;;) {
 532                                 /*
 533                                  * Block until there are '0' threads
 534                                  * with a REQUEST handle.
 535                                  */
 536                                 sig_hup_block = TRUE;
 537                                 if( (total_active_threads() == 0) ||
 538                                     (max_wait >= 5) ) {
 539                                         sig_hup_block = FALSE;
 540                                         break;
 541                                 }
 542                                 sleep(1);
 543                                 max_wait++;
 544                         }
 545 #endif
 546                         if (read_mainconfig(TRUE) < 0) {
 547                                 exit(1);
 548                         }
 549
 550                         need_reload = FALSE;
 551                         radlog(L_INFO, "Ready to process requests.");
 552                 }
 553
 554                 FD_ZERO(&readfds);
 555                 max_fd = 0;
 556
 557                 /*
 558                  *      Loop over all the listening FD's.
 559                  */
 560                 for (listener = mainconfig.listen;
 561                      listener != NULL;
 562                      listener = listener->next) {
 563                         if (listener->fd < 0) continue;
 564
 565                         FD_SET(listener->fd, &readfds);
 566                         if (listener->fd > max_fd) max_fd = listener->fd;
 567                 }
 568
 569 #ifdef WITH_SNMP
 570                 if (mainconfig.do_snmp &&
 571                     (rad_snmp.smux_fd >= 0)) {
 572                         FD_SET(rad_snmp.smux_fd, &readfds);
 573                         if (rad_snmp.smux_fd > max_fd) max_fd = rad_snmp.smux_fd;
 574                 }
 575 #endif
 576
 577                 if (sleep_time == SLEEP_FOREVER) {
 578                         DEBUG2("Nothing to do.  Sleeping until we see a request.");
 579                         status = select(max_fd + 1, &readfds, NULL, NULL, NULL);
 580                 } else {
 581                         struct timeval tv;
 582
 583                         DEBUG2("Waking up in %d seconds...", sleep_time);
 584
 585                         tv.tv_sec = sleep_time;
 586                         tv.tv_usec = 0;
 587                         status = select(max_fd + 1, &readfds, NULL, NULL, &tv);
 588                 }
 589                 if (status == -1) {
 590                         /*
 591                          *      On interrupts, we clean up the request
 592                          *      list.  We then continue with the loop,
 593                          *      so that if we're supposed to exit,
 594                          *      then the code at the start of the loop
 595                          *      catches that, and exits.
 596                          */
 597                         if (errno == EINTR) {
 598 #ifdef MEMORY_USE_DEBUGGING
 599                                 /*
 600                                  *      Run the server in debugging mode,
 601                                  *      without threads, and give it a
 602                                  *      SIGHUP.  It will clean up after
 603                                  *      itself, and any memory left over
 604                                  *      should be allocated by C libraries,
 605                                  *      and the like.
 606                                  */
 607                                 detach_modules();
 608                                 free_mainconfig();
 609                                 xlat_free();
 610                                 dict_free();
 611                                 exit(1);
 612 #endif
 613                                 continue;
 614                         }
 615                         radlog(L_ERR, "Unexpected error in select(): %s",
 616                                         strerror(errno));
 617                         exit(1);
 618                 }
 619
 620                 time_now = time(NULL);
 621 #ifndef HAVE_PTHREAD_H
 622                 /*
 623                  *      If there are no child threads, then there may
 624                  *      be child processes.  In that case, wait for
 625                  *      their exit status, and throw that exit status
 626                  *      away.  This helps get rid of zxombie children.
 627                  */
 628                 while (waitpid(-1, &argval, WNOHANG) > 0) {
 629                         /* do nothing */
 630                 }
 631 #endif
 632
 633                 /*
 634                  *      Loop over the open socket FD's, reading any data.
 635                  */
 636                 for (listener = mainconfig.listen;
 637                      listener != NULL;
 638                      listener = listener->next) {
 639                         RAD_REQUEST_FUNP fun;
 640
 641                         if ((listener->fd >= 0) &&
 642                             !FD_ISSET(listener->fd, &readfds))
 643                                 continue;
 644
 645                         /*
 646                          *  Receive the packet.
 647                          */
 648                         if (sig_hup_block != FALSE) {
 649                                 continue;
 650                         }
 651
 652                         /*
 653                          *      Do per-socket receive processing of the
 654                          *      packet.
 655                          */
 656                         if (!listener->recv(listener, &fun, &request)) {
 657                                 continue;
 658                         }
 659
 660                         /*
 661                          *      Drop the request into the thread pool,
 662                          *      and let the thread pool take care of
 663                          *      doing something with it.
 664                          */
 665                         if (!thread_pool_addrequest(request, fun)) {
 666                                 /*
 667                                  *      FIXME: Maybe just drop
 668                                  *      the packet on the floor?
 669                                  */
 670                                 request_reject(request, REQUEST_FAIL_NO_THREADS);
 671                                 request->finished = TRUE;
 672                         }
 673                 } /* loop over listening sockets*/
 674
 675 #ifdef WITH_SNMP
 676                 if (mainconfig.do_snmp) {
 677                         /*
 678                          *  After handling all authentication/accounting
 679                          *  requests, THEN process any pending SMUX/SNMP
 680                          *  queries.
 681                          *
 682                          *  Note that the handling is done in the main server,
 683                          *  which probably isn't a Good Thing.  It really
 684                          *  should be wrapped, and handled in a thread pool.
 685                          */
 686                         if ((rad_snmp.smux_fd >= 0) &&
 687                             FD_ISSET(rad_snmp.smux_fd, &readfds) &&
 688                             (rad_snmp.smux_event == SMUX_READ)) {
 689                                 smux_read();
 690                         }
 691
 692                         /*
 693                          *  If we've got to re-connect, then do so now,
 694                          *  before calling select again.
 695                          */
 696                         if (rad_snmp.smux_event == SMUX_CONNECT) {
 697                                 smux_connect();
 698                         }
 699                 }
 700 #endif
 701
 702                 /*
 703                  *      Loop through the request lists once per
 704                  *      second, to clean up old requests.
 705                  */
 706                 if (last_cleaned_lists != time_now) {
 707                         last_cleaned_lists = time_now;
 708
 709                         DEBUG2("--- Walking the entire request list ---");
 710                         sleep_time = SLEEP_FOREVER;
 711                         for (listener = mainconfig.listen;
 712                              listener != NULL;
 713                              listener = listener->next) {
 714                                 int next;
 715
 716                                 next = listener->update(listener, time_now);
 717                                 if (next < sleep_time) {
 718                                         sleep_time = next;
 719                                 }
 720                         }
 721                 }
 722
 723 #ifdef HAVE_PTHREAD_H
 724
 725                 /*
 726                  *      Only clean the thread pool if we're spawning
 727                  *      child threads.
 728                  */
 729                 if (spawn_flag) {
 730                         thread_pool_clean(time_now);
 731                 }
 732 #endif
 733         } /* loop forever */
 734 }
 735
 736
 737 /*
 738  *  Display the syntax for starting this program.
 739  */
 740 static void usage(int status)
 741 {
 742         FILE *output = status?stderr:stdout;
 743
 744         fprintf(output,
 745                         "Usage: %s [-a acct_dir] [-d db_dir] [-l log_dir] [-i address] [-AcfnsSvXxyz]\n", progname);
 746         fprintf(output, "Options:\n\n");
 747         fprintf(output, "  -a acct_dir     use accounting directory 'acct_dir'.\n");
 748         fprintf(output, "  -A              Log auth detail.\n");
 749         fprintf(output, "  -d raddb_dir    Configuration files are in \"raddbdir/*\".\n");
 750         fprintf(output, "  -f              Run as a foreground process, not a daemon.\n");
 751         fprintf(output, "  -h              Print this help message.\n");
 752         fprintf(output, "  -i ipaddr       Listen on ipaddr ONLY\n");
 753         fprintf(output, "  -l log_dir      Log file is \"log_dir/radius.log\" (not used in debug mode)\n");
 754         fprintf(output, "  -p port         Listen on port ONLY\n");
 755         fprintf(output, "  -s              Do not spawn child processes to handle requests.\n");
 756         fprintf(output, "  -S              Log stripped names.\n");
 757         fprintf(output, "  -v              Print server version information.\n");
 758         fprintf(output, "  -X              Turn on full debugging.\n");
 759         fprintf(output, "  -x              Turn on additional debugging. (-xx gives more debugging).\n");
 760         fprintf(output, "  -y              Log authentication failures, with password.\n");
 761         fprintf(output, "  -z              Log authentication successes, with password.\n");
 762         exit(status);
 763 }
 764
 765
 766 /*
 767  *      We got a fatal signal.
 768  */
 769 static void sig_fatal(int sig)
 770 {
 771         switch(sig) {
 772                 case SIGSEGV:
 773                         /* We can't really do anything intelligent here so just die */
 774                         _exit(1);
 775                 case SIGTERM:
 776                         do_exit = 1;
 777                         break;
 778                 default:
 779                         do_exit = 2;
 780                         break;
 781         }
 782 }
 783
 784
 785 /*
 786  *  We got the hangup signal.
 787  *  Re-read the configuration files.
 788  */
 789 /*ARGSUSED*/
 790 static void sig_hup(int sig)
 791 {
 792         sig = sig; /* -Wunused */
 793
 794         reset_signal(SIGHUP, sig_hup);
 795
 796         /*
 797          *  Only do the reload if we're the main server, both
 798          *  for processes, and for threads.
 799          */
 800         if (getpid() == radius_pid) {
 801                 need_reload = TRUE;
 802         }
 803 #ifdef WITH_SNMP
 804         if (mainconfig.do_snmp) {
 805                 rad_snmp.smux_failures = 0;
 806                 rad_snmp.smux_event = SMUX_CONNECT;
 807         }
 808 #endif
 809 }