eggdrop1.9/src/main.c

/*
 * main.c --
 *
 *  core event handling
 *  signal handling
 *  command line arguments
 */
/*
 * Copyright (C) 1997 Robey Pointer
 * Copyright (C) 1999, 2000, 2001, 2002 Eggheads Development Team
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
/*
 * The author (Robey Pointer) can be reached at:  robey@netcom.com
 * NOTE: Robey is no longer working on this code, there is a discussion
 * list available at eggheads@eggheads.org.
 */

#ifndef lint
static const char rcsid[] = "$Id: main.c,v 1.120 2002/06/18 06:12:32 guppy Exp $";
#endif

#include "main.h"
#include <fcntl.h>
#include <time.h>
#include <errno.h>
#include <signal.h>
#include <netdb.h>
#include <setjmp.h>
#include "users.h"          /* check_expired_ignores, 
                       autolink_cycle,
                       get_user_by_handle       */
#include "chanprog.h"           /* tell_verbose_status, 
                       chanprog, rehash     */
#include "net.h"            /* killsock, setsock, 
                       dequeue_sockets, sockgets    */
#include "userrec.h"            /* write_userfile, count_users  */
#include <locale.h>

#ifdef STOP_UAC             /* osf/1 complains a lot */
#include <sys/sysinfo.h>
#define UAC_NOPRINT    0x00000001   /* Don't report unaligned fixups */
#endif
/* Some systems have a working sys/wait.h even though configure will
 * decide it's not bsd compatable.  Oh well.
 */

#include "chan.h"
#include "modules.h"
#include "tandem.h"
#include "bg.h"
#include "core_binds.h"
#include "logfile.h"
#include "misc.h"
#include "traffic.h"
#include "dccutil.h"            /* dprintf_eggdrop, new_dcc, 
                       dcc_chatter, dcc_remove_lost,
                       lostdcc          */

#include "lib/adns/adns.h"

#ifdef CYGWIN_HACKS
#include <windows.h>
#endif

#ifndef _POSIX_SOURCE
/* Solaris needs this */
#define _POSIX_SOURCE 1
#endif

extern char      userfile[], botnetnick[];
extern int       dcc_total, conmask, cache_hit, cache_miss;
extern struct dcc_t *dcc;
extern struct userrec   *userlist;
extern struct chanset_t *chanset;
extern jmp_buf       alarmret;

#ifndef MAKING_MODS
extern struct dcc_table DCC_CHAT;
#endif /* MAKING_MODS   */

/*
 * Please use the PATCH macro instead of directly altering the version
 * string from now on (it makes it much easier to maintain patches).
 * Also please read the README file regarding your rights to distribute
 * modified versions of this bot.
 */

char    egg_version[1024] = VERSION;
int egg_numver = VERSION_NUM;

eggdrop_t *egg = NULL;      /* Eggdrop's context */

char    notify_new[121] = "";   /* Person to send a note to for new users */
int default_flags = 0;  /* Default user flags and */
int default_uflags = 0; /* Default userdefinied flags for people
                   who say 'hello' or for .adduser */

int backgrd = 1;        /* Run in the background? */
int con_chan = 0;       /* Foreground: constantly display channel
                   stats? */
int term_z = 0;     /* Foreground: use the terminal as a party
                   line? */
char    configfile[121] = "eggdrop.conf"; /* Name of the config file */
static char preload_module[121] = ""; /* Name of the module to preload */
char    helpdir[121];       /* Directory of help files (if used) */
char    textdir[121] = "";  /* Directory for text files that get dumped */
time_t  online_since;       /* Unix-time that the bot loaded up */
int make_userfile = 0;  /* Using bot in make-userfile mode? (first
                   user to 'hello' becomes master) */
char    owner[121] = "";    /* Permanent owner(s) of the bot */
char    pid_file[120];      /* Name of the file for the pid to be
                   stored in */
int save_users_at = 0;  /* How many minutes past the hour to
                   save the userfile? */
int notify_users_at = 0;    /* How many minutes past the hour to
                   notify users of notes? */
char    version[81];        /* Version info (long form) */
char    ver[41];        /* Version info (short form) */
char    egg_xtra[2048];     /* Patch info */
int use_stderr = 1;     /* Send stuff to stderr instead of logfiles? */
int do_restart = 0;     /* .restart has been called, restart asap */
int die_on_sighup = 0;  /* die if bot receives SIGHUP */
int die_on_sigterm = 1; /* die if bot receives SIGTERM */
int resolve_timeout = 15;   /* hostname/address lookup timeout */
char    quit_msg[1024];     /* quit message */
time_t  now;            /* duh, now :) */
egg_timeval_t egg_timeval_now;  /* Same thing, but seconds and microseconds. */

void fatal(const char *s, int recoverable)
{
  int i;

  putlog(LOG_MISC, "*", "* %s", s);
  flushlogs();
  for (i = 0; i < dcc_total; i++)
    if (dcc[i].sock >= 0)
      killsock(dcc[i].sock);
  unlink(pid_file);
  if (!recoverable) {
    bg_send_quit(BG_ABORT);
    exit(1);
  }
}

static void check_expired_dcc()
{
  int i;

  for (i = 0; i < dcc_total; i++)
    if (dcc[i].type && dcc[i].type->timeout_val &&
    ((now - dcc[i].timeval) > *(dcc[i].type->timeout_val))) {
      if (dcc[i].type->timeout)
    dcc[i].type->timeout(i);
      else if (dcc[i].type->eof)
    dcc[i].type->eof(i);
      else
    continue;
      /* Only timeout 1 socket per cycle, too risky for more */
      return;
    }
}

static void got_bus(int z)
{
  fatal("BUS ERROR -- CRASHING!", 1);
#ifdef SA_RESETHAND
  kill(getpid(), SIGBUS);
#else
  bg_send_quit(BG_ABORT);
  exit(1);
#endif
}

static void got_segv(int z)
{
  fatal("SEGMENT VIOLATION -- CRASHING!", 1);
#ifdef SA_RESETHAND
  kill(getpid(), SIGSEGV);
#else
  bg_send_quit(BG_ABORT);
  exit(1);
#endif
}

static void got_fpe(int z)
{
  fatal("FLOATING POINT ERROR -- CRASHING!", 0);
}

static void got_term(int z)
{
  write_userfile(-1);
  check_bind_event("sigterm");
  if (die_on_sigterm) {
    fatal("TERMINATE SIGNAL -- SIGNING OFF", 0);
  } else {
    putlog(LOG_MISC, "*", "RECEIVED TERMINATE SIGNAL (IGNORING)");
  }
}

static void got_quit(int z)
{
  check_bind_event("sigquit");
  putlog(LOG_MISC, "*", "RECEIVED QUIT SIGNAL (IGNORING)");
  return;
}

static void got_hup(int z)
{
  write_userfile(-1);
  check_bind_event("sighup");
  if (die_on_sighup) {
    fatal("HANGUP SIGNAL -- SIGNING OFF", 0);
  } else
    putlog(LOG_MISC, "*", "Received HUP signal: rehashing...");
  do_restart = -2;
  return;
}

/* A call to resolver (gethostbyname, etc) timed out
 */
static void got_alarm(int z)
{
  longjmp(alarmret, 1);

  /* -Never reached- */
}

/* Got ILL signal
 */
static void got_ill(int z)
{
  check_bind_event("sigill");
}


static void print_version (void)
{
  char x[1024], *z = x;
    
  strlcpy(x, egg_version, sizeof x);
  newsplit(&z);
  newsplit(&z);
  printf("%s\n", version);
  if (z[0])
    printf("  (patches: %s)\n", z);
}

static void print_help (void)
{
  print_version ();
  printf("\n\
Usage: %s [OPTIONS]... [FILE]\n", PACKAGE);
  printf(_("\n\
  -h, --help                 Print help and exit\n\
  -v, --version              Print version and exit\n\
  -n, --foreground           Don't go into the background (default=off)\n\
  -c  --channel-stats        (with -n) Display channel stats every 10 seconds\n\
  -t  --terminal             (with -n) Use terminal to simulate dcc-chat\n\
  -m  --make-userfile        Userfile creation mode\n\
  -p  --load-module=STRING   Modules to load before parsing any configuration\n\
                             file\n\
  FILE  optional config filename (default 'eggdrop.conf')\n"));
  printf("\n");
}

static void do_args(int argc, char * const *argv)
{
  int c;
  
  optarg = 0;
  optind = 1;
  opterr = 1;
  optopt = '?';
      
  while (1) {
    int option_index = 0;
    static struct option long_options[] = {
      { "help",       0, NULL, 'h' },
      { "version",    0, NULL, 'v' },
      { "load-module",    1, NULL, 'p' },
      { "foreground",      0, NULL, 'n' },
      { "channel-stats",      0, NULL, 'c' },
      { "terminal",   0, NULL, 't' },
      { "make-userfile",      0, NULL, 'm' },
      { NULL, 0, NULL, 0 }
    };
      
    c = getopt_long (argc, argv, "hvp:nctm", long_options, &option_index);

    if (c == -1) break;
    
    switch (c) {
      case 'n':
    backgrd = 0;
    break;

      case 'c':
    con_chan = 1;
    term_z = 0;
    break;

      case 't':
    con_chan = 0;
    term_z = 1;
        break;

      case 'm':
    make_userfile = 1;
        break;

      case 'p':
    strlcpy(preload_module, optarg, sizeof preload_module);
    break;

      case 'v':
    print_version();
    bg_send_quit(BG_ABORT);
    exit(0);
        break; /* this should never be reached */

      case 'h':
    print_help();
    bg_send_quit(BG_ABORT);
    exit(0);
    break; /* this should never be reached */

      case 0: /* Long option with no short option */
      case '?':       /* Invalid option.  */
    /* getopt_long() already printed an error message.  */
    bg_send_quit(BG_ABORT);
    exit(1);

      default:        /* bug: option not considered.  */
    fprintf (stderr, "%s: option unknown: %c\n", PACKAGE, c);
    bg_send_quit(BG_ABORT);
    exit(1);
    break; /* this should never be reached */
    }
  }
  if (optind < argc)
    strlcpy(configfile, argv[optind], sizeof configfile);
}

/* Timer info */
static int      lastmin = 99;
static struct tm    nowtm;

/* Called once a second.
 */
static void core_secondly()
{
  static int cnt = 0;
  int miltime;

  call_hook(HOOK_SECONDLY); /* Will be removed later */
  cnt++;
  if (cnt >= 10) {      /* Every 10 seconds */
    cnt = 0;
    check_expired_dcc();
    if (con_chan && !backgrd) {
      dprintf(DP_STDOUT, "\033[2J\033[1;1H");
      tell_verbose_status(DP_STDOUT);
      do_module_report(DP_STDOUT, 0, "server");
      do_module_report(DP_STDOUT, 0, "channels");
    }
  }
  memcpy(&nowtm, localtime(&now), sizeof(struct tm));
  if (nowtm.tm_min != lastmin) {
    int i = 0;

    /* Once a minute */
    lastmin = (lastmin + 1) % 60;
    call_hook(HOOK_MINUTELY);
    check_expired_ignores();
    autolink_cycle(NULL);   /* Attempt autolinks */
    /* In case for some reason more than 1 min has passed: */
    while (nowtm.tm_min != lastmin) {
      /* Timer drift, dammit */
      debug2("timer: drift (lastmin=%d, now=%d)", lastmin, nowtm.tm_min);
      i++;
      lastmin = (lastmin + 1) % 60;
      call_hook(HOOK_MINUTELY);
    }
    if (i > 1)
      putlog(LOG_MISC, "*", "(!) timer drift -- spun %d minutes", i);
    miltime = (nowtm.tm_hour * 100) + (nowtm.tm_min);
    if (((int) (nowtm.tm_min / 5) * 5) == (nowtm.tm_min)) { /* 5 min */
      call_hook(HOOK_5MINUTELY);
      if (!miltime) {   /* At midnight */
    char s[25];

    strlcpy(s, ctime(&now), sizeof s);
    putlog(LOG_ALL, "*", "--- %.11s%s", s, s + 20);
    call_hook(HOOK_BACKUP);
    call_hook(HOOK_DAILY);
      }
    }
    if (nowtm.tm_min == notify_users_at)
      call_hook(HOOK_HOURLY);
  }
}

static void core_minutely()
{
  check_bind_time(&nowtm);
}

static void core_hourly()
{
  write_userfile(-1);
}

static void event_rehash()
{
  check_bind_event("rehash");
}

static void event_prerehash()
{
  check_bind_event("prerehash");
}

static void event_save()
{
  check_bind_event("save");
}

static void event_logfile()
{
  check_bind_event("logfile");
}

static void event_loaded()
{
  check_bind_event("loaded");
}

void kill_tcl();
extern module_entry *module_list;
void restart_chons();

int init_userent(), init_net(),
 init_tcl(int, char **);
void botnet_init();
void dns_init();
void binds_init();
void dcc_init();

void patch(const char *str)
{
  char *p = strchr(egg_version, '+');

  if (!p)
    p = &egg_version[strlen(egg_version)];
  sprintf(p, "+%s", str);
  egg_numver++;
  sprintf(&egg_xtra[strlen(egg_xtra)], " %s", str);
}

/*
static inline void garbage_collect(void)
{
  static u_8bit_t   run_cnt = 0;

  if (run_cnt == 3)
    garbage_collect_tclhash();
  else
    run_cnt++;
}
*/

int main(int argc, char **argv)
{
  int xx, i;
  char buf[520], s[25];
  FILE *f;
  struct sigaction sv;
  struct chanset_t *chan;
  egg_timeval_t howlong;

#ifdef DEBUG
  /* Make sure it can write core, if you make debug. Else it's pretty
   * useless (dw)
   */
  {
#include <sys/resource.h>
    struct rlimit cdlim;

    cdlim.rlim_cur = RLIM_INFINITY;
    cdlim.rlim_max = RLIM_INFINITY;
    setrlimit(RLIMIT_CORE, &cdlim);
  }
#endif

#ifdef ENABLE_NLS
  setlocale(LC_MESSAGES, "");
  bindtextdomain(PACKAGE, LOCALEDIR);
  textdomain(PACKAGE);
#endif
  
#include "patch.h"
  /* Version info! */
  snprintf(ver, sizeof ver, "%s v%s", PACKAGE, egg_version);
  snprintf(version, sizeof version, "Eggdrop v%s (C) 1997 Robey Pointer (C) 2002 Eggheads",
           egg_version);
  /* Now add on the patchlevel (for Tcl) */
  sprintf(&egg_version[strlen(egg_version)], " %u", egg_numver);
  strcat(egg_version, egg_xtra);
#ifdef STOP_UAC
  {
    int nvpair[2];

    nvpair[0] = SSIN_UACPROC;
    nvpair[1] = UAC_NOPRINT;
    setsysinfo(SSI_NVPAIRS, (char *) nvpair, 1, NULL, 0);
  }
#endif

  /* Set up error traps: */
  sv.sa_handler = got_bus;
  sigemptyset(&sv.sa_mask);
#ifdef SA_RESETHAND
  sv.sa_flags = SA_RESETHAND;
#else
  sv.sa_flags = 0;
#endif
  sigaction(SIGBUS, &sv, NULL);
  sv.sa_handler = got_segv;
  sigaction(SIGSEGV, &sv, NULL);
#ifdef SA_RESETHAND
  sv.sa_flags = 0;
#endif
  sv.sa_handler = got_fpe;
  sigaction(SIGFPE, &sv, NULL);
  sv.sa_handler = got_term;
  sigaction(SIGTERM, &sv, NULL);
  sv.sa_handler = got_hup;
  sigaction(SIGHUP, &sv, NULL);
  sv.sa_handler = got_quit;
  sigaction(SIGQUIT, &sv, NULL);
  sv.sa_handler = SIG_IGN;
  sigaction(SIGPIPE, &sv, NULL);
  sv.sa_handler = got_ill;
  sigaction(SIGILL, &sv, NULL);
  sv.sa_handler = got_alarm;
  sigaction(SIGALRM, &sv, NULL);

  /* Initialize variables and stuff */
  timer_update_now(&egg_timeval_now);
  now = egg_timeval_now.sec;
  chanset = NULL;
  memcpy(&nowtm, localtime(&now), sizeof(struct tm));
  lastmin = nowtm.tm_min;
  srandom(now % (getpid() + getppid()));

  do_args(argc, argv);

  printf("\n%s\n", version);
  printf("   *** WARNING: Do NOT run this DEVELOPMENT version for any purpose other than testing.\n\n");

  /* Don't allow eggdrop to run as root */
  if (((int) getuid() == 0) || ((int) geteuid() == 0))
    fatal(_("ERROR: Eggdrop will not run as root!"), 0);

  egg = eggdrop_new();
  script_init();
  binds_init();
  modules_init();
  logfile_init();
  timer_init();
  dns_init();
  egg_dns_init();
  core_binds_init();
  dcc_init();
  user_init();
  init_userent();
  botnet_init();
  init_net();
  traffic_init();

  if (backgrd)
    bg_prepare_split();

  init_tcl(argc, argv);

  strlcpy(s, ctime(&now), sizeof s);
  strcpy(&s[11], &s[20]);
  putlog(LOG_ALL, "*", "--- Loading %s (%s)", ver, s);
  if (preload_module[0])
    module_load(preload_module);
  chanprog();
  if (!encrypt_pass) {
    printf(_("You have installed modules but have not selected an encryption\n\
module, please consult the default config file for info.\n"));
    bg_send_quit(BG_ABORT);
    exit(1);
  }
  i = 0;
  for (chan = chanset; chan; chan = chan->next)
    i++;
  putlog(LOG_MISC, "*", "=== %s: %d channels, %d users.",
     botnetnick, i, count_users(userlist));
  cache_miss = 0;
  cache_hit = 0;

  if (!pid_file[0])
    snprintf(pid_file, sizeof pid_file, "pid.%s", botnetnick);

  /* Check for pre-existing eggdrop! */
  f = fopen(pid_file, "r");
  if (f != NULL) {
    fgets(s, 10, f);
    xx = atoi(s);
    kill(xx, SIGCHLD);      /* Meaningless kill to determine if pid
                   is used */
    if (errno != ESRCH) {
      printf(_("I detect %s already running from this directory.\n"), botnetnick);
      printf(_("If this is incorrect, erase the %s\n"), pid_file);
      bg_send_quit(BG_ABORT);
      exit(1);
    }
  }

  /* Move into background? */
  if (backgrd) {
#ifndef CYGWIN_HACKS
    bg_do_split();
  } else {          /* !backgrd */
#endif
    xx = getpid();
    if (xx != 0) {
      FILE *fp;

      /* Write pid to file */
      unlink(pid_file);
      fp = fopen(pid_file, "w");
      if (fp != NULL) {
        fprintf(fp, "%u\n", xx);
        if (fflush(fp)) {
      /* Let the bot live since this doesn't appear to be a botchk */
      printf(_("* Warning!  Could not write %s file!\n"), pid_file);
      fclose(fp);
      unlink(pid_file);
        } else
      fclose(fp);
      } else
        printf(_("* Warning!  Could not write %s file!\n"), pid_file);
#ifdef CYGWIN_HACKS
      printf("Launched into the background  (pid: %d)\n\n", xx);
#endif
    }
  }

  use_stderr = 0;       /* Stop writing to stderr now */
  if (backgrd) {
    /* Ok, try to disassociate from controlling terminal (finger cross) */
#if HAVE_SETPGID && !defined(CYGWIN_HACKS)
    setpgid(0, 0);
#endif
    /* Tcl wants the stdin, stdout and stderr file handles kept open. */
    freopen("/dev/null", "r", stdin);
    freopen("/dev/null", "w", stdout);
    freopen("/dev/null", "w", stderr);
#ifdef CYGWIN_HACKS
    FreeConsole();
#endif
  }

  /* Terminal emulating dcc chat */
  if (!backgrd && term_z) {
    int n = new_dcc(&DCC_CHAT, sizeof(struct chat_info));

    dcc[n].addr[0] = '\0';
    dcc[n].sock = STDOUT;
    dcc[n].timeval = now;
    dcc[n].u.chat->con_flags = conmask;
    dcc[n].status = STAT_ECHO;
    strcpy(dcc[n].nick, "HQ");
    strcpy(dcc[n].host, "llama@console");
    dcc[n].user = get_user_by_handle(userlist, dcc[n].nick);
    /* Make sure there's an innocuous HQ user if needed */
    if (!dcc[n].user) {
      userlist = adduser(userlist, dcc[n].nick, "none", "-", USER_PARTY);
      dcc[n].user = get_user_by_handle(userlist, dcc[n].nick);
    }
    setsock(STDOUT, 0);     /* Entry in net table */
    dprintf(n, "\n### ENTERING DCC CHAT SIMULATION ###\n\n");
    dcc_chatter(n);
  }

  online_since = now;
  autolink_cycle(NULL);     /* Hurry and connect to tandem bots */
  add_help_reference("cmds1.help");
  add_help_reference("cmds2.help");
  add_help_reference("core.help");
  howlong.sec = 1;
  howlong.usec = 0;
  timer_create_repeater(&howlong, (Function) core_secondly);

  /* init time'd hooks */
  add_hook(HOOK_MINUTELY, (Function) core_minutely);
  add_hook(HOOK_HOURLY, (Function) core_hourly);
  add_hook(HOOK_REHASH, (Function) event_rehash);
  add_hook(HOOK_PRE_REHASH, (Function) event_prerehash);
  add_hook(HOOK_USERFILE, (Function) event_save);
  add_hook(HOOK_BACKUP, (Function) backup_userfile);
  add_hook(HOOK_DAILY, (Function) event_logfile);
  add_hook(HOOK_LOADED, (Function) event_loaded);

  call_hook(HOOK_LOADED);

  debug0("main: entering loop");
  while (1) {
    int socket_cleanup = 0;

#if !defined(HAVE_PRE7_5_TCL)
    /* Process a single tcl event */
    Tcl_DoOneEvent(TCL_ALL_EVENTS | TCL_DONT_WAIT);
#endif

    /* Lets move some of this here, reducing the numer of actual
     * calls to periodic_timers
     */
    timer_get_time(&egg_timeval_now);
    now = egg_timeval_now.sec;
    random();           /* Woop, lets really jumble things */
    timer_run();

    /* Only do this every so often. */
    if (!socket_cleanup) {
      socket_cleanup = 5;

      /* Remove dead dcc entries. */
      dcc_remove_lost();

      /* Check for server or dcc activity. */
      dequeue_sockets();
    } else
      socket_cleanup--;

    /* Free unused structures. */
    /* garbage_collect(); */

    sockbuf_update_all(0);
    xx = sockgets(buf, &i);
    timer_update_now(&egg_timeval_now);
    if (xx >= 0) {      /* Non-error */
      int idx;

      for (idx = 0; idx < dcc_total; idx++)
    if (dcc[idx].sock == xx) {
      if (dcc[idx].type && dcc[idx].type->activity) {

        /* update traffic stats */
        traffic_update_in(dcc[idx].type, (strlen(buf) + 1));

        dcc[idx].type->activity(idx, buf, i);
      } else
        putlog(LOG_MISC, "*",
           "!!! untrapped dcc activity: type %s, sock %d",
           dcc[idx].type->name, dcc[idx].sock);
      break;
    }
    } else if (xx == -1) {  /* EOF from someone */
      int idx;

      if (i == STDOUT && !backgrd)
    fatal("END OF FILE ON TERMINAL", 0);
      for (idx = 0; idx < dcc_total; idx++)
    if (dcc[idx].sock == i) {
      if (dcc[idx].type && dcc[idx].type->eof)
        dcc[idx].type->eof(idx);
      else {
        putlog(LOG_MISC, "*",
           "*** ATTENTION: DEAD SOCKET (%d) OF TYPE %s UNTRAPPED",
           i, dcc[idx].type ? dcc[idx].type->name : "*UNKNOWN*");
        killsock(i);
        lostdcc(idx);
      }
      idx = dcc_total + 1;
    }
      if (idx == dcc_total) {
    putlog(LOG_MISC, "*",
           "(@) EOF socket %d, not a dcc socket, not anything.", i);
    close(i);
    killsock(i);
      }
    } else if (xx == -2 && errno != EINTR) {    /* select() error */
      putlog(LOG_MISC, "*", "* Socket error #%d; recovering.", errno);
      for (i = 0; i < dcc_total; i++) {
    if ((fcntl(dcc[i].sock, F_GETFD, 0) == -1) && (errno = EBADF)) {
      putlog(LOG_MISC, "*",
         "DCC socket %d (type %d, name '%s') expired -- pfft",
         dcc[i].sock, dcc[i].type, dcc[i].nick);
      killsock(dcc[i].sock);
      lostdcc(i);
      i--;
    }
      }
    } else if (xx == -3) {
      call_hook(HOOK_IDLE);
      socket_cleanup = 0;   /* If we've been idle, cleanup & flush */
    }

    if (do_restart) {
      if (do_restart == -2)
    rehash();
      else {
    /* Unload as many modules as possible */
    int f = 1;
    module_entry *p;
    Function x;
    char xx[256];

    /* oops, I guess we should call this event before tcl is restarted */
    check_bind_event("prerestart");

    while (f) {
      f = 0;
      for (p = module_list; p != NULL; p = p->next) {
        dependancy *d = dependancy_list;
        int ok = 1;

        while (ok && d) {
          if (d->needed == p)
        ok = 0;
          d = d->next;
        }
        if (ok) {
          strcpy(xx, p->name);
          if (module_unload(xx, botnetnick) == NULL) {
        f = 1;
        break;
          }
        }
      }
    }
    p = module_list;
    if (p && p->next && p->next->next)
      /* Should be only 2 modules now - blowfish (or some other
         encryption module) and eggdrop. */
      putlog(LOG_MISC, "*", _("Stagnant module; there WILL be memory leaks!"));
    flushlogs();
    kill_tcl();
    timer_destroy_all(); /* Destroy all timers. */
    init_tcl(argc, argv);
    /* We expect the encryption module as the current module pointed
     * to by `module_list'.
     */
    x = p->funcs[MODCALL_START];
    /* `NULL' indicates that we just recently restarted. The module
     * is expected to re-initialise as needed.
     */
    x(NULL);
    rehash();
    restart_chons();
    call_hook(HOOK_LOADED);
      }
      do_restart = 0;
    }
  }
}
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