asterisk.c

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/*
 * Asterisk -- A telephony toolkit for Linux.
 *
 * Top level source file for asterisk
 * 
 * Copyright (C) 1999, Mark Spencer
 *
 * Mark Spencer <markster@linux-support.net>
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License
 */

#include <unistd.h>
#include <stdlib.h>
#include <sys/poll.h>
#include <asterisk/logger.h>
#include <asterisk/options.h>
#include <asterisk/cli.h>
#include <asterisk/channel.h>
#include <asterisk/ulaw.h>
#include <asterisk/alaw.h>
#include <asterisk/callerid.h>
#include <asterisk/module.h>
#include <asterisk/image.h>
#include <asterisk/tdd.h>
#include <asterisk/term.h>
#include <asterisk/manager.h>
#include <asterisk/pbx.h>
#include <asterisk/enum.h>
#include <asterisk/rtp.h>
#include <asterisk/app.h>
#include <asterisk/lock.h>
#include <asterisk/utils.h>
#include <sys/resource.h>
#include <fcntl.h>
#include <stdio.h>
#include <signal.h>
#include <sched.h>
#include <asterisk/io.h>
#include <asterisk/lock.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/wait.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include "editline/histedit.h"
#include "asterisk.h"
#include <asterisk/config.h>

#if  defined(__FreeBSD__)
#include <netdb.h>
#endif

#define AST_MAX_CONNECTS 128
#define NUM_MSGS 64

int option_verbose=0;
int option_debug=0;
int option_nofork=0;
int option_quiet=0;
int option_console=0;
int option_highpriority=0;
int option_remote=0;
int option_exec=0;
int option_initcrypto=0;
int option_nocolor;
int option_dumpcore = 0;
int option_overrideconfig = 0;
int fully_booted = 0;

static int ast_socket = -1;      /* UNIX Socket for allowing remote control */
static int ast_consock = -1;     /* UNIX Socket for controlling another asterisk */
int ast_mainpid;
struct console {
   int fd;              /* File descriptor */
   int p[2];            /* Pipe */
   pthread_t t;         /* Thread of handler */
};

static struct ast_atexit {
   void (*func)(void);
   struct ast_atexit *next;
} *atexits = NULL;
AST_MUTEX_DEFINE_STATIC(atexitslock);

time_t ast_startuptime;
time_t ast_lastreloadtime;

static History *el_hist = NULL;
static EditLine *el = NULL;
static char *remotehostname;

struct console consoles[AST_MAX_CONNECTS];

char defaultlanguage[MAX_LANGUAGE] = DEFAULT_LANGUAGE;

static int ast_el_add_history(char *);
static int ast_el_read_history(char *);
static int ast_el_write_history(char *);

char ast_config_AST_CONFIG_DIR[AST_CONFIG_MAX_PATH];
char ast_config_AST_CONFIG_FILE[AST_CONFIG_MAX_PATH];
char ast_config_AST_MODULE_DIR[AST_CONFIG_MAX_PATH];
char ast_config_AST_SPOOL_DIR[AST_CONFIG_MAX_PATH];
char ast_config_AST_VAR_DIR[AST_CONFIG_MAX_PATH];
char ast_config_AST_LOG_DIR[AST_CONFIG_MAX_PATH];
char ast_config_AST_AGI_DIR[AST_CONFIG_MAX_PATH];
char ast_config_AST_DB[AST_CONFIG_MAX_PATH];
char ast_config_AST_KEY_DIR[AST_CONFIG_MAX_PATH];
char ast_config_AST_PID[AST_CONFIG_MAX_PATH];
char ast_config_AST_SOCKET[AST_CONFIG_MAX_PATH];
char ast_config_AST_RUN_DIR[AST_CONFIG_MAX_PATH];

static char *_argv[256];
static int shuttingdown = 0;
static int restartnow = 0;
static pthread_t consolethread = AST_PTHREADT_NULL;

int ast_register_atexit(void (*func)(void))
{
   int res = -1;
   struct ast_atexit *ae;
   ast_unregister_atexit(func);
   ae = malloc(sizeof(struct ast_atexit));
   ast_mutex_lock(&atexitslock);
   if (ae) {
      memset(ae, 0, sizeof(struct ast_atexit));
      ae->next = atexits;
      ae->func = func;
      atexits = ae;
      res = 0;
   }
   ast_mutex_unlock(&atexitslock);
   return res;
}

void ast_unregister_atexit(void (*func)(void))
{
   struct ast_atexit *ae, *prev = NULL;
   ast_mutex_lock(&atexitslock);
   ae = atexits;
   while(ae) {
      if (ae->func == func) {
         if (prev)
            prev->next = ae->next;
         else
            atexits = ae->next;
         break;
      }
      prev = ae;
      ae = ae->next;
   }
   ast_mutex_unlock(&atexitslock);
}

static int fdprint(int fd, const char *s)
{
   return write(fd, s, strlen(s) + 1);
}

int ast_safe_system(const char *s)
{
   /* XXX This function needs some optimization work XXX */
   pid_t pid;
   int x;
   int res;
   struct rusage rusage;
   int status;
   pid = fork();
   if (pid == 0) {
      /* Close file descriptors and launch system command */
      for (x=STDERR_FILENO + 1; x<4096;x++) {
         close(x);
      }
      res = execl("/bin/sh", "/bin/sh", "-c", s, NULL);
      exit(1);
   } else if (pid > 0) {
      for(;;) {
         res = wait4(pid, &status, 0, &rusage);
         if (res > -1) {
            if (WIFEXITED(status))
               res = WEXITSTATUS(status);
            else
               res = -1;
         } else {
            if (errno != EINTR) 
               break;
         }
      }
   } else {
      ast_log(LOG_WARNING, "Fork failed: %s\n", strerror(errno));
      res = -1;
   }
   return res;
}

/*
 * write the string to all attached console clients
 */
static void ast_network_puts(const char *string)
{
    int x;
    for (x=0;x<AST_MAX_CONNECTS; x++) {
   if (consoles[x].fd > -1) 
       fdprint(consoles[x].p[1], string);
    }
}


/*
 * write the string to the console, and all attached
 * console clients
 */
void ast_console_puts(const char *string)
{
    fputs(string, stdout);
    fflush(stdout);
    ast_network_puts(string);
}

static void network_verboser(const char *s, int pos, int replace, int complete)
     /* ARGUSED */
{
    ast_network_puts(s);
}

static pthread_t lthread;

static void *netconsole(void *vconsole)
{
   struct console *con = vconsole;
   char hostname[256];
   char tmp[512];
   int res;
   struct pollfd fds[2];
   
   if (gethostname(hostname, sizeof(hostname)))
      strncpy(hostname, "<Unknown>", sizeof(hostname)-1);
   snprintf(tmp, sizeof(tmp), "%s/%d/%s\n", hostname, ast_mainpid, ASTERISK_VERSION);
   fdprint(con->fd, tmp);
   for(;;) {
      fds[0].fd = con->fd;
      fds[0].events = POLLIN;
      fds[1].fd = con->p[0];
      fds[1].events = POLLIN;

      res = poll(fds, 2, -1);
      if (res < 0) {
         if (errno != EINTR)
            ast_log(LOG_WARNING, "poll returned < 0: %s\n", strerror(errno));
         continue;
      }
      if (fds[0].revents) {
         res = read(con->fd, tmp, sizeof(tmp));
         if (res < 1) {
            break;
         }
         tmp[res] = 0;
         ast_cli_command(con->fd, tmp);
      }
      if (fds[1].revents) {
         res = read(con->p[0], tmp, sizeof(tmp));
         if (res < 1) {
            ast_log(LOG_ERROR, "read returned %d\n", res);
            break;
         }
         res = write(con->fd, tmp, res);
         if (res < 1)
            break;
      }
   }
   if (option_verbose > 2) 
      ast_verbose(VERBOSE_PREFIX_3 "Remote UNIX connection disconnected\n");
   close(con->fd);
   close(con->p[0]);
   close(con->p[1]);
   con->fd = -1;
   
   return NULL;
}

static void *listener(void *unused)
{
   struct sockaddr_un sun;
   int s;
   int len;
   int x;
   int flags;
   struct pollfd fds[1];
   pthread_attr_t attr;
   pthread_attr_init(&attr);
   pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
   for(;;) {
      if (ast_socket < 0)
         return NULL;
      fds[0].fd = ast_socket;
      fds[0].events= POLLIN;
      s = poll(fds, 1, -1);
      if (s < 0) {
         if (errno != EINTR)
            ast_log(LOG_WARNING, "poll returned error: %s\n", strerror(errno));
         continue;
      }
      len = sizeof(sun);
      s = accept(ast_socket, (struct sockaddr *)&sun, &len);
      if (s < 0) {
         if (errno != EINTR)
            ast_log(LOG_WARNING, "Accept returned %d: %s\n", s, strerror(errno));
      } else {
         for (x=0;x<AST_MAX_CONNECTS;x++) {
            if (consoles[x].fd < 0) {
               if (socketpair(AF_LOCAL, SOCK_STREAM, 0, consoles[x].p)) {
                  ast_log(LOG_ERROR, "Unable to create pipe: %s\n", strerror(errno));
                  consoles[x].fd = -1;
                  fdprint(s, "Server failed to create pipe\n");
                  close(s);
                  break;
               }
               flags = fcntl(consoles[x].p[1], F_GETFL);
               fcntl(consoles[x].p[1], F_SETFL, flags | O_NONBLOCK);
               consoles[x].fd = s;
               if (pthread_create(&consoles[x].t, &attr, netconsole, &consoles[x])) {
                  ast_log(LOG_ERROR, "Unable to spawn thread to handle connection: %s\n", strerror(errno));
                  consoles[x].fd = -1;
                  fdprint(s, "Server failed to spawn thread\n");
                  close(s);
               }
               break;
            }
         }
         if (x >= AST_MAX_CONNECTS) {
            fdprint(s, "No more connections allowed\n");
            ast_log(LOG_WARNING, "No more connections allowed\n");
            close(s);
         } else if (consoles[x].fd > -1) {
            if (option_verbose > 2) 
               ast_verbose(VERBOSE_PREFIX_3 "Remote UNIX connection\n");
         }
      }
   }
   return NULL;
}

static int ast_makesocket(void)
{
   struct sockaddr_un sun;
   int res;
   int x;
   for (x=0;x<AST_MAX_CONNECTS;x++) 
      consoles[x].fd = -1;
   unlink((char *)ast_config_AST_SOCKET);
   ast_socket = socket(PF_LOCAL, SOCK_STREAM, 0);
   if (ast_socket < 0) {
      ast_log(LOG_WARNING, "Unable to create control socket: %s\n", strerror(errno));
      return -1;
   }     
   memset(&sun, 0, sizeof(sun));
   sun.sun_family = AF_LOCAL;
   strncpy(sun.sun_path, (char *)ast_config_AST_SOCKET, sizeof(sun.sun_path)-1);
   res = bind(ast_socket, (struct sockaddr *)&sun, sizeof(sun));
   if (res) {
      ast_log(LOG_WARNING, "Unable to bind socket to %s: %s\n", (char *)ast_config_AST_SOCKET, strerror(errno));
      close(ast_socket);
      ast_socket = -1;
      return -1;
   }
   res = listen(ast_socket, 2);
   if (res < 0) {
      ast_log(LOG_WARNING, "Unable to listen on socket %s: %s\n", (char *)ast_config_AST_SOCKET, strerror(errno));
      close(ast_socket);
      ast_socket = -1;
      return -1;
   }
   ast_register_verbose(network_verboser);
   pthread_create(&lthread, NULL, listener, NULL);
   return 0;
}

static int ast_tryconnect(void)
{
   struct sockaddr_un sun;
   int res;
   ast_consock = socket(PF_LOCAL, SOCK_STREAM, 0);
   if (ast_consock < 0) {
      ast_log(LOG_WARNING, "Unable to create socket: %s\n", strerror(errno));
      return 0;
   }
   memset(&sun, 0, sizeof(sun));
   sun.sun_family = AF_LOCAL;
   strncpy(sun.sun_path, (char *)ast_config_AST_SOCKET, sizeof(sun.sun_path)-1);
   res = connect(ast_consock, (struct sockaddr *)&sun, sizeof(sun));
   if (res) {
      close(ast_consock);
      ast_consock = -1;
      return 0;
   } else
      return 1;
}

static void urg_handler(int num)
{
   /* Called by soft_hangup to interrupt the poll, read, or other
      system call.  We don't actually need to do anything though.  */
   /* Cannot EVER ast_log from within a signal handler */
   if (option_debug) 
      printf("Urgent handler\n");
   signal(num, urg_handler);
   return;
}

static void hup_handler(int num)
{
   if (option_verbose > 1) 
      printf("Received HUP signal -- Reloading configs\n");
   if (restartnow)
      execvp(_argv[0], _argv);
   /* XXX This could deadlock XXX */
   ast_module_reload();
}

static void child_handler(int sig)
{
   /* Must not ever ast_log or ast_verbose within signal handler */
   int n, status;

   /*
    * Reap all dead children -- not just one
    */
   for (n = 0; wait4(-1, &status, WNOHANG, NULL) > 0; n++)
      ;
   if (n == 0 && option_debug)   
      printf("Huh?  Child handler, but nobody there?\n");
}

static void set_title(char *text)
{
   /* Set an X-term or screen title */
   if (getenv("TERM") && strstr(getenv("TERM"), "xterm"))
      fprintf(stdout, "\033]2;%s\007", text);
}

static void set_icon(char *text)
{
   if (getenv("TERM") && strstr(getenv("TERM"), "xterm"))
      fprintf(stdout, "\033]1;%s\007", text);
}

static int set_priority(int pri)
{
   struct sched_param sched;
   memset(&sched, 0, sizeof(sched));
   /* We set ourselves to a high priority, that we might pre-empt everything
      else.  If your PBX has heavy activity on it, this is a good thing.  */
#ifdef __linux__
   if (pri) {  
      sched.sched_priority = 10;
      if (sched_setscheduler(0, SCHED_RR, &sched)) {
         ast_log(LOG_WARNING, "Unable to set high priority\n");
         return -1;
      } else
         if (option_verbose)
            ast_verbose("Set to realtime thread\n");
   } else {
      sched.sched_priority = 0;
      if (sched_setscheduler(0, SCHED_OTHER, &sched)) {
         ast_log(LOG_WARNING, "Unable to set normal priority\n");
         return -1;
      }
   }
#else
   if (pri) {
      if (setpriority(PRIO_PROCESS, 0, -10) == -1) {
         ast_log(LOG_WARNING, "Unable to set high priority\n");
         return -1;
      } else
         if (option_verbose)
            ast_verbose("Set to high priority\n");
   } else {
      if (setpriority(PRIO_PROCESS, 0, 0) == -1) {
         ast_log(LOG_WARNING, "Unable to set normal priority\n");
         return -1;
      }
   }
#endif
   return 0;
}

static void ast_run_atexits(void)
{
   struct ast_atexit *ae;
   ast_mutex_lock(&atexitslock);
   ae = atexits;
   while(ae) {
      if (ae->func) 
         ae->func();
      ae = ae->next;
   }
   ast_mutex_unlock(&atexitslock);
}

static void quit_handler(int num, int nice, int safeshutdown, int restart)
{
   char filename[80] = "";
   time_t s,e;
   int x;
   if (safeshutdown) {
      shuttingdown = 1;
      if (!nice) {
         /* Begin shutdown routine, hanging up active channels */
         ast_begin_shutdown(1);
         if (option_verbose && option_console)
            ast_verbose("Beginning asterisk %s....\n", restart ? "restart" : "shutdown");
         time(&s);
         for(;;) {
            time(&e);
            /* Wait up to 15 seconds for all channels to go away */
            if ((e - s) > 15)
               break;
            if (!ast_active_channels())
               break;
            if (!shuttingdown)
               break;
            /* Sleep 1/10 of a second */
            usleep(100000);
         }
      } else {
         if (nice < 2)
            ast_begin_shutdown(0);
         if (option_verbose && option_console)
            ast_verbose("Waiting for inactivity to perform %s...\n", restart ? "restart" : "halt");
         for(;;) {
            if (!ast_active_channels())
               break;
            if (!shuttingdown)
               break;
            sleep(1);
         }
      }

      if (!shuttingdown) {
         if (option_verbose && option_console)
            ast_verbose("Asterisk %s cancelled.\n", restart ? "restart" : "shutdown");
         return;
      }
   }
   if (option_console || option_remote) {
      if (getenv("HOME")) 
         snprintf(filename, sizeof(filename), "%s/.asterisk_history", getenv("HOME"));
      if (!ast_strlen_zero(filename))
         ast_el_write_history(filename);
      if (el != NULL)
         el_end(el);
      if (el_hist != NULL)
         history_end(el_hist);
   }
   if (option_verbose)
      ast_verbose("Executing last minute cleanups\n");
   ast_run_atexits();
   /* Called on exit */
   if (option_verbose && option_console)
      ast_verbose("Asterisk %s ending (%d).\n", ast_active_channels() ? "uncleanly" : "cleanly", num);
   else if (option_debug)
      ast_log(LOG_DEBUG, "Asterisk ending (%d).\n", num);
   manager_event(EVENT_FLAG_SYSTEM, "Shutdown", "Shutdown: %s\r\nRestart: %s\r\n", ast_active_channels() ? "Uncleanly" : "Cleanly", restart ? "True" : "False");
   if (ast_socket > -1) {
      close(ast_socket);
      ast_socket = -1;
   }
   if (ast_consock > -1)
      close(ast_consock);
   if (ast_socket > -1)
      unlink((char *)ast_config_AST_SOCKET);
   if (!option_remote) unlink((char *)ast_config_AST_PID);
   printf(term_quit());
   if (restart) {
      if (option_verbose || option_console)
         ast_verbose("Preparing for Asterisk restart...\n");
      /* Mark all FD's for closing on exec */
      for (x=3;x<32768;x++) {
         fcntl(x, F_SETFD, FD_CLOEXEC);
      }
      if (option_verbose || option_console)
         ast_verbose("Restarting Asterisk NOW...\n");
      restartnow = 1;
      /* If there is a consolethread running send it a SIGHUP 
         so it can execvp, otherwise we can do it ourselves */
      if (consolethread != AST_PTHREADT_NULL) {
         pthread_kill(consolethread, SIGHUP);
         /* Give the signal handler some time to complete */
         sleep(2);
      } else
         execvp(_argv[0], _argv);
   
   }
   exit(0);
}

static void __quit_handler(int num)
{
   quit_handler(num, 0, 1, 0);
}

static const char *fix_header(char *outbuf, int maxout, const char *s, char *cmp)
{
   const char *c;
   if (!strncmp(s, cmp, strlen(cmp))) {
      c = s + strlen(cmp);
      term_color(outbuf, cmp, COLOR_GRAY, 0, maxout);
      return c;
   }
   return NULL;
}

static void console_verboser(const char *s, int pos, int replace, int complete)
{
   char tmp[80];
   const char *c=NULL;
   /* Return to the beginning of the line */
   if (!pos) {
      fprintf(stdout, "\r");
      if ((c = fix_header(tmp, sizeof(tmp), s, VERBOSE_PREFIX_4)) ||
         (c = fix_header(tmp, sizeof(tmp), s, VERBOSE_PREFIX_3)) ||
         (c = fix_header(tmp, sizeof(tmp), s, VERBOSE_PREFIX_2)) ||
         (c = fix_header(tmp, sizeof(tmp), s, VERBOSE_PREFIX_1)))
         fputs(tmp, stdout);
   }
   if (c)
      fputs(c + pos,stdout);
   else
      fputs(s + pos,stdout);
   fflush(stdout);
   if (complete)
   /* Wake up a poll()ing console */
      if (option_console && consolethread != AST_PTHREADT_NULL)
         pthread_kill(consolethread, SIGURG);
}

static void consolehandler(char *s)
{
   printf(term_end());
   fflush(stdout);
   /* Called when readline data is available */
   if (s && !ast_strlen_zero(s))
      ast_el_add_history(s);
   /* Give the console access to the shell */
   if (s) {
      /* The real handler for bang */
      if (s[0] == '!') {
         if (s[1])
            ast_safe_system(s+1);
         else
            ast_safe_system(getenv("SHELL") ? getenv("SHELL") : "/bin/sh");
      } else 
      ast_cli_command(STDOUT_FILENO, s);
   } else
      fprintf(stdout, "\nUse \"quit\" to exit\n");
}

static int remoteconsolehandler(char *s)
{
   int ret = 0;
   /* Called when readline data is available */
   if (s && !ast_strlen_zero(s))
      ast_el_add_history(s);
   /* Give the console access to the shell */
   if (s) {
      /* The real handler for bang */
      if (s[0] == '!') {
         if (s[1])
            ast_safe_system(s+1);
         else
            ast_safe_system(getenv("SHELL") ? getenv("SHELL") : "/bin/sh");
         ret = 1;
      }
      if ((strncasecmp(s, "quit", 4) == 0 || strncasecmp(s, "exit", 4) == 0) &&
          (s[4] == '\0' || isspace(s[4]))) {
         quit_handler(0, 0, 0, 0);
         ret = 1;
      }
   } else
      fprintf(stdout, "\nUse \"quit\" to exit\n");

   return ret;
}

static char quit_help[] = 
"Usage: quit\n"
"       Exits Asterisk.\n";

static char abort_halt_help[] = 
"Usage: abort shutdown\n"
"       Causes Asterisk to abort an executing shutdown or restart, and resume normal\n"
"       call operations.\n";

static char shutdown_now_help[] = 
"Usage: stop now\n"
"       Shuts down a running Asterisk immediately, hanging up all active calls .\n";

static char shutdown_gracefully_help[] = 
"Usage: stop gracefully\n"
"       Causes Asterisk to not accept new calls, and exit when all\n"
"       active calls have terminated normally.\n";

static char shutdown_when_convenient_help[] = 
"Usage: stop when convenient\n"
"       Causes Asterisk to perform a shutdown when all active calls have ended.\n";

static char restart_now_help[] = 
"Usage: restart now\n"
"       Causes Asterisk to hangup all calls and exec() itself performing a cold.\n"
"       restart.\n";

static char restart_gracefully_help[] = 
"Usage: restart gracefully\n"
"       Causes Asterisk to stop accepting new calls and exec() itself performing a cold.\n"
"       restart when all active calls have ended.\n";

static char restart_when_convenient_help[] = 
"Usage: restart when convenient\n"
"       Causes Asterisk to perform a cold restart when all active calls have ended.\n";

static char bang_help[] =
"Usage: !<command>\n"
"       Executes a given shell command\n";

#if 0
static int handle_quit(int fd, int argc, char *argv[])
{
   if (argc != 1)
      return RESULT_SHOWUSAGE;
   quit_handler(0, 0, 1, 0);
   return RESULT_SUCCESS;
}
#endif

static int no_more_quit(int fd, int argc, char *argv[])
{
   if (argc != 1)
      return RESULT_SHOWUSAGE;
   ast_cli(fd, "The QUIT and EXIT commands may no longer be used to shutdown the PBX.\n"
               "Please use STOP NOW instead, if you wish to shutdown the PBX.\n");
   return RESULT_SUCCESS;
}

static int handle_shutdown_now(int fd, int argc, char *argv[])
{
   if (argc != 2)
      return RESULT_SHOWUSAGE;
   quit_handler(0, 0 /* Not nice */, 1 /* safely */, 0 /* not restart */);
   return RESULT_SUCCESS;
}

static int handle_shutdown_gracefully(int fd, int argc, char *argv[])
{
   if (argc != 2)
      return RESULT_SHOWUSAGE;
   quit_handler(0, 1 /* nicely */, 1 /* safely */, 0 /* no restart */);
   return RESULT_SUCCESS;
}

static int handle_shutdown_when_convenient(int fd, int argc, char *argv[])
{
   if (argc != 3)
      return RESULT_SHOWUSAGE;
   quit_handler(0, 2 /* really nicely */, 1 /* safely */, 0 /* don't restart */);
   return RESULT_SUCCESS;
}

static int handle_restart_now(int fd, int argc, char *argv[])
{
   if (argc != 2)
      return RESULT_SHOWUSAGE;
   quit_handler(0, 0 /* not nicely */, 1 /* safely */, 1 /* restart */);
   return RESULT_SUCCESS;
}

static int handle_restart_gracefully(int fd, int argc, char *argv[])
{
   if (argc != 2)
      return RESULT_SHOWUSAGE;
   quit_handler(0, 1 /* nicely */, 1 /* safely */, 1 /* restart */);
   return RESULT_SUCCESS;
}

static int handle_restart_when_convenient(int fd, int argc, char *argv[])
{
   if (argc != 3)
      return RESULT_SHOWUSAGE;
   quit_handler(0, 2 /* really nicely */, 1 /* safely */, 1 /* restart */);
   return RESULT_SUCCESS;
}

static int handle_abort_halt(int fd, int argc, char *argv[])
{
   if (argc != 2)
      return RESULT_SHOWUSAGE;
   ast_cancel_shutdown();
   shuttingdown = 0;
   return RESULT_SUCCESS;
}

static int handle_bang(int fd, int argc, char *argv[])
{
   return RESULT_SUCCESS;
}

#define ASTERISK_PROMPT "*CLI> "

#define ASTERISK_PROMPT2 "%s*CLI> "

static struct ast_cli_entry aborthalt = { { "abort", "halt", NULL }, handle_abort_halt, "Cancel a running halt", abort_halt_help };

static struct ast_cli_entry quit =  { { "quit", NULL }, no_more_quit, "Exit Asterisk", quit_help };
static struct ast_cli_entry astexit =  { { "exit", NULL }, no_more_quit, "Exit Asterisk", quit_help };

static struct ast_cli_entry astshutdownnow =    { { "stop", "now", NULL }, handle_shutdown_now, "Shut down Asterisk immediately", shutdown_now_help };
static struct ast_cli_entry astshutdowngracefully =   { { "stop", "gracefully", NULL }, handle_shutdown_gracefully, "Gracefully shut down Asterisk", shutdown_gracefully_help };
static struct ast_cli_entry astshutdownwhenconvenient =  { { "stop", "when","convenient", NULL }, handle_shutdown_when_convenient, "Shut down Asterisk at empty call volume", shutdown_when_convenient_help };
static struct ast_cli_entry astrestartnow =  { { "restart", "now", NULL }, handle_restart_now, "Restart Asterisk immediately", restart_now_help };
static struct ast_cli_entry astrestartgracefully =    { { "restart", "gracefully", NULL }, handle_restart_gracefully, "Restart Asterisk gracefully", restart_gracefully_help };
static struct ast_cli_entry astrestartwhenconvenient=    { { "restart", "when", "convenient", NULL }, handle_restart_when_convenient, "Restart Asterisk at empty call volume", restart_when_convenient_help };
static struct ast_cli_entry astbang = { { "!", NULL }, handle_bang, "Execute a shell command", bang_help };

static int ast_el_read_char(EditLine *el, char *cp)
{
    int num_read=0;
   int lastpos=0;
   struct pollfd fds[2];
   int res;
   int max;
   char buf[512];

   for (;;) {
      max = 1;
      fds[0].fd = ast_consock;
      fds[0].events = POLLIN;
      if (!option_exec) {
         fds[1].fd = STDIN_FILENO;
         fds[1].events = POLLIN;
         max++;
      }
      res = poll(fds, max, -1);
      if (res < 0) {
         if (errno == EINTR)
            continue;
         ast_log(LOG_ERROR, "poll failed: %s\n", strerror(errno));
         break;
      }

      if (!option_exec && fds[1].revents) {
         num_read = read(STDIN_FILENO, cp, 1);
         if (num_read < 1) {
            break;
         } else 
            return (num_read);
      }
      if (fds[0].revents) {
         res = read(ast_consock, buf, sizeof(buf) - 1);
         /* if the remote side disappears exit */
         if (res < 1) {
            fprintf(stderr, "\nDisconnected from Asterisk server\n");
            quit_handler(0, 0, 0, 0);
         }

         buf[res] = '\0';

         if (!option_exec && !lastpos)
            write(STDOUT_FILENO, "\r", 1);
         write(STDOUT_FILENO, buf, res);
         if ((buf[res-1] == '\n') || (buf[res-2] == '\n')) {
            *cp = CC_REFRESH;
            return(1);
         } else {
            lastpos = 1;
         }
      }
   }

   *cp = '\0';
   return (0);
}

static char *cli_prompt(EditLine *el)
{
   static char prompt[200];
   char *pfmt;
   int color_used=0;
   char term_code[20];

   if ((pfmt = getenv("ASTERISK_PROMPT"))) {
      char *t = pfmt, *p = prompt;
      memset(prompt, 0, sizeof(prompt));
      while (*t != '\0' && *p < sizeof(prompt)) {
         if (*t == '%') {
            char hostname[256];
            int i;
            struct timeval tv;
            struct tm tm;
#ifdef linux
            FILE *LOADAVG;
#endif
            int fgcolor = COLOR_WHITE, bgcolor = COLOR_BLACK;

            t++;
            switch (*t) {
               case 'C': /* color */
                  t++;
                  if (sscanf(t, "%d;%d%n", &fgcolor, &bgcolor, &i) == 2) {
                     strncat(p, term_color_code(term_code, fgcolor, bgcolor, sizeof(term_code)),sizeof(prompt) - strlen(prompt));
                     t += i - 1;
                  } else if (sscanf(t, "%d%n", &fgcolor, &i) == 1) {
                     strncat(p, term_color_code(term_code, fgcolor, 0, sizeof(term_code)),sizeof(prompt) - strlen(prompt));
                     t += i - 1;
                  }

                  /* If the color has been reset correctly, then there's no need to reset it later */
                  if ((fgcolor == COLOR_WHITE) && (bgcolor == COLOR_BLACK)) {
                     color_used = 0;
                  } else {
                     color_used = 1;
                  }
                  break;
               case 'd': /* date */
                  memset(&tm, 0, sizeof(struct tm));
                  gettimeofday(&tv, NULL);
                  if (localtime_r(&(tv.tv_sec), &tm)) {
                     strftime(p, sizeof(prompt) - strlen(prompt), "%Y-%m-%d", &tm);
                  }
                  break;
               case 'h': /* hostname */
                  if (!gethostname(hostname, sizeof(hostname) - 1)) {
                     strncat(p, hostname, sizeof(prompt) - strlen(prompt));
                  } else {
                     strncat(p, "localhost", sizeof(prompt) - strlen(prompt));
                  }
                  break;
               case 'H': /* short hostname */
                  if (!gethostname(hostname, sizeof(hostname) - 1)) {
                     for (i=0;i<sizeof(hostname);i++) {
                        if (hostname[i] == '.') {
                           hostname[i] = '\0';
                           break;
                        }
                     }
                     strncat(p, hostname, sizeof(prompt) - strlen(prompt));
                  } else {
                     strncat(p, "localhost", sizeof(prompt) - strlen(prompt));
                  }
                  break;
#ifdef linux
               case 'l': /* load avg */
                  t++;
                  if ((LOADAVG = fopen("/proc/loadavg", "r"))) {
                     float avg1, avg2, avg3;
                     int actproc, totproc, npid, which;
                     fscanf(LOADAVG, "%f %f %f %d/%d %d",
                        &avg1, &avg2, &avg3, &actproc, &totproc, &npid);
                     if (sscanf(t, "%d", &which) == 1) {
                        switch (which) {
                           case 1:
                              snprintf(p, sizeof(prompt) - strlen(prompt), "%.2f", avg1);
                              break;
                           case 2:
                              snprintf(p, sizeof(prompt) - strlen(prompt), "%.2f", avg2);
                              break;
                           case 3:
                              snprintf(p, sizeof(prompt) - strlen(prompt), "%.2f", avg3);
                              break;
                           case 4:
                              snprintf(p, sizeof(prompt) - strlen(prompt), "%d/%d", actproc, totproc);
                              break;
                           case 5:
                              snprintf(p, sizeof(prompt) - strlen(prompt), "%d", npid);
                              break;
                        }
                     }
                  }
                  break;
#endif
               case 't': /* time */
                  memset(&tm, 0, sizeof(struct tm));
                  gettimeofday(&tv, NULL);
                  if (localtime_r(&(tv.tv_sec), &tm)) {
                     strftime(p, sizeof(prompt) - strlen(prompt), "%H:%M:%S", &tm);
                  }
                  break;
               case '#': /* process console or remote? */
                  if (! option_remote) {
                     strncat(p, "#", sizeof(prompt) - strlen(prompt));
                  } else {
                     strncat(p, ">", sizeof(prompt) - strlen(prompt));
                  }
                  break;
               case '%': /* literal % */
                  strncat(p, "%", sizeof(prompt) - strlen(prompt));
                  break;
               case '\0': /* % is last character - prevent bug */
                  t--;
                  break;
            }
            while (*p != '\0') {
               p++;
            }
            t++;
         } else {
            *p = *t;
            p++;
            t++;
         }
      }
      if (color_used) {
         /* Force colors back to normal at end */
         term_color_code(term_code, COLOR_WHITE, COLOR_BLACK, sizeof(term_code));
         if (strlen(term_code) > sizeof(prompt) - strlen(prompt)) {
            strncat(prompt + sizeof(prompt) - strlen(term_code) - 1, term_code, strlen(term_code));
         } else {
            strncat(p, term_code, sizeof(term_code));
         }
      }
   } else if (remotehostname)
      snprintf(prompt, sizeof(prompt), ASTERISK_PROMPT2, remotehostname);
   else
      snprintf(prompt, sizeof(prompt), ASTERISK_PROMPT);

   return(prompt);   
}

static char **ast_el_strtoarr(char *buf)
{
   char **match_list = NULL, *retstr;
        size_t match_list_len;
   int matches = 0;

        match_list_len = 1;
   while ( (retstr = strsep(&buf, " ")) != NULL) {

      if (!strcmp(retstr, AST_CLI_COMPLETE_EOF))
         break;
                if (matches + 1 >= match_list_len) {
                        match_list_len <<= 1;
                        match_list = realloc(match_list, match_list_len * sizeof(char *));
      }

      match_list[matches++] = strdup(retstr);
   }

        if (!match_list)
                return (char **) NULL;

   if (matches>= match_list_len)
      match_list = realloc(match_list, (match_list_len + 1) * sizeof(char *));

   match_list[matches] = (char *) NULL;

   return match_list;
}

static int ast_el_sort_compare(const void *i1, const void *i2)
{
   char *s1, *s2;

   s1 = ((char **)i1)[0];
   s2 = ((char **)i2)[0];

   return strcasecmp(s1, s2);
}

static int ast_cli_display_match_list(char **matches, int len, int max)
{
   int i, idx, limit, count;
   int screenwidth = 0;
   int numoutput = 0, numoutputline = 0;

   screenwidth = ast_get_termcols(STDOUT_FILENO);

   /* find out how many entries can be put on one line, with two spaces between strings */
   limit = screenwidth / (max + 2);
   if (limit == 0)
      limit = 1;

   /* how many lines of output */
   count = len / limit;
   if (count * limit < len)
      count++;

   idx = 1;

   qsort(&matches[0], (size_t)(len + 1), sizeof(char *), ast_el_sort_compare);

   for (; count > 0; count--) {
      numoutputline = 0;
      for (i=0; i < limit && matches[idx]; i++, idx++) {

         /* Don't print dupes */
         if ( (matches[idx+1] != NULL && strcmp(matches[idx], matches[idx+1]) == 0 ) ) {
            i--;
            continue;
         }

         numoutput++;  numoutputline++;
         fprintf(stdout, "%-*s  ", max, matches[idx]);
      }
      if (numoutputline > 0)
         fprintf(stdout, "\n");
   }

   return numoutput;
}


static char *cli_complete(EditLine *el, int ch)
{
   int len=0;
   char *ptr;
   int nummatches = 0;
   char **matches;
   int retval = CC_ERROR;
   char buf[2048];
   int res;

   LineInfo *lf = (LineInfo *)el_line(el);

   *(char *)lf->cursor = '\0';
   ptr = (char *)lf->cursor;
   if (ptr) {
      while (ptr > lf->buffer) {
         if (isspace(*ptr)) {
            ptr++;
            break;
         }
         ptr--;
      }
   }

   len = lf->cursor - ptr;

   if (option_remote) {
      snprintf(buf, sizeof(buf),"_COMMAND NUMMATCHES \"%s\" \"%s\"", lf->buffer, ptr); 
      fdprint(ast_consock, buf);
      res = read(ast_consock, buf, sizeof(buf));
      buf[res] = '\0';
      nummatches = atoi(buf);

      if (nummatches > 0) {
         char *mbuf;
         int mlen = 0, maxmbuf = 2048;
         /* Start with a 2048 byte buffer */
         mbuf = malloc(maxmbuf);
         if (!mbuf)
            return (char *)(CC_ERROR);
         snprintf(buf, sizeof(buf),"_COMMAND MATCHESARRAY \"%s\" \"%s\"", lf->buffer, ptr); 
         fdprint(ast_consock, buf);
         res = 0;
         mbuf[0] = '\0';
         while (!strstr(mbuf, AST_CLI_COMPLETE_EOF) && res != -1) {
            if (mlen + 1024 > maxmbuf) {
               /* Every step increment buffer 1024 bytes */
               maxmbuf += 1024;
               mbuf = realloc(mbuf, maxmbuf);
               if (!mbuf)
                  return (char *)(CC_ERROR);
            }
            /* Only read 1024 bytes at a time */
            res = read(ast_consock, mbuf + mlen, 1024);
            if (res > 0)
               mlen += res;
         }
         mbuf[mlen] = '\0';

         matches = ast_el_strtoarr(mbuf);
         free(mbuf);
      } else
         matches = (char **) NULL;


   }  else {

      nummatches = ast_cli_generatornummatches((char *)lf->buffer,ptr);
      matches = ast_cli_completion_matches((char *)lf->buffer,ptr);
   }

   if (matches) {
      int i;
      int matches_num, maxlen, match_len;

      if (matches[0][0] != '\0') {
         el_deletestr(el, (int) len);
         el_insertstr(el, matches[0]);
         retval = CC_REFRESH;
      }

      if (nummatches == 1) {
         /* Found an exact match */
         el_insertstr(el, " ");
         retval = CC_REFRESH;
      } else {
         /* Must be more than one match */
         for (i=1, maxlen=0; matches[i]; i++) {
            match_len = strlen(matches[i]);
            if (match_len > maxlen)
               maxlen = match_len;
         }
         matches_num = i - 1;
         if (matches_num >1) {
            fprintf(stdout, "\n");
            ast_cli_display_match_list(matches, nummatches, maxlen);
            retval = CC_REDISPLAY;
         } else { 
            el_insertstr(el," ");
            retval = CC_REFRESH;
         }
      }
   free(matches);
   }

   return (char *)retval;
}

static int ast_el_initialize(void)
{
   HistEvent ev;

   if (el != NULL)
      el_end(el);
   if (el_hist != NULL)
      history_end(el_hist);

   el = el_init("asterisk", stdin, stdout, stderr);
   el_set(el, EL_PROMPT, cli_prompt);

   el_set(el, EL_EDITMODE, 1);      
   el_set(el, EL_EDITOR, "emacs");     
   el_hist = history_init();
   if (!el || !el_hist)
      return -1;

   /* setup history with 100 entries */
   history(el_hist, &ev, H_SETSIZE, 100);

   el_set(el, EL_HIST, history, el_hist);

   el_set(el, EL_ADDFN, "ed-complete", "Complete argument", cli_complete);
   /* Bind <tab> to command completion */
   el_set(el, EL_BIND, "^I", "ed-complete", NULL);
   /* Bind ? to command completion */
   el_set(el, EL_BIND, "?", "ed-complete", NULL);
   /* Bind ^D to redisplay */
   el_set(el, EL_BIND, "^D", "ed-redisplay", NULL);

   return 0;
}

static int ast_el_add_history(char *buf)
{
   HistEvent ev;

   if (el_hist == NULL || el == NULL)
      ast_el_initialize();
   if (strlen(buf) > 256)
      return 0;
   return (history(el_hist, &ev, H_ENTER, buf));
}

static int ast_el_write_history(char *filename)
{
   HistEvent ev;

   if (el_hist == NULL || el == NULL)
      ast_el_initialize();

   return (history(el_hist, &ev, H_SAVE, filename));
}

static int ast_el_read_history(char *filename)
{
   char buf[256];
   FILE *f;
   int ret = -1;

   if (el_hist == NULL || el == NULL)
      ast_el_initialize();

   if ((f = fopen(filename, "r")) == NULL)
      return ret;

   while (!feof(f)) {
      fgets(buf, sizeof(buf), f);
      if (!strcmp(buf, "_HiStOrY_V2_\n"))
         continue;
      if ((ret = ast_el_add_history(buf)) == -1)
         break;
   }
   fclose(f);

   return ret;
}

static void ast_remotecontrol(char * data)
{
   char buf[80];
   int res;
   char filename[80] = "";
   char *hostname;
   char *cpid;
   char *version;
   int pid;
   char tmp[80];
   char *stringp=NULL;

   char *ebuf;
   int num = 0;

   read(ast_consock, buf, sizeof(buf));
   if (data)
      write(ast_consock, data, strlen(data) + 1);
   stringp=buf;
   hostname = strsep(&stringp, "/");
   cpid = strsep(&stringp, "/");
   version = strsep(&stringp, "\n");
   if (!version)
      version = "<Version Unknown>";
   stringp=hostname;
   strsep(&stringp, ".");
   if (cpid)
      pid = atoi(cpid);
   else
      pid = -1;
   snprintf(tmp, sizeof(tmp), "set verbose atleast %d", option_verbose);
   fdprint(ast_consock, tmp);
   ast_verbose("Connected to Asterisk %s currently running on %s (pid = %d)\n", version, hostname, pid);
   remotehostname = hostname;
   if (getenv("HOME")) 
      snprintf(filename, sizeof(filename), "%s/.asterisk_history", getenv("HOME"));
   if (el_hist == NULL || el == NULL)
      ast_el_initialize();

   el_set(el, EL_GETCFN, ast_el_read_char);

   if (!ast_strlen_zero(filename))
      ast_el_read_history(filename);

   ast_cli_register(&quit);
   ast_cli_register(&astexit);
#if 0
   ast_cli_register(&astshutdown);
#endif   
   if (option_exec && data) {  /* hack to print output then exit if asterisk -rx is used */
      char tempchar;
      ast_el_read_char(el, &tempchar);
      return;
   }
   for(;;) {
      ebuf = (char *)el_gets(el, &num);

      if (ebuf && !ast_strlen_zero(ebuf)) {
         if (ebuf[strlen(ebuf)-1] == '\n')
            ebuf[strlen(ebuf)-1] = '\0';
         if (!remoteconsolehandler(ebuf)) {
            res = write(ast_consock, ebuf, strlen(ebuf) + 1);
            if (res < 1) {
               ast_log(LOG_WARNING, "Unable to write: %s\n", strerror(errno));
               break;
            }
         }
      }
   }
   printf("\nDisconnected from Asterisk server\n");
}

static int show_cli_help(void) {
   printf("Asterisk " ASTERISK_VERSION ", Copyright (C) 2000-2004, Digium.\n");
   printf("Usage: asterisk [OPTIONS]\n");
   printf("Valid Options:\n");
   printf("   -C <configfile> Use an alternate configuration file\n");
   printf("   -c              Provide console CLI\n");
   printf("   -d              Enable extra debugging\n");
   printf("   -f              Do not fork\n");
   printf("   -g              Dump core in case of a crash\n");
   printf("   -h              This help screen\n");
   printf("   -i              Initializie crypto keys at startup\n");
   printf("   -n              Disable console colorization\n");
   printf("   -p              Run as pseudo-realtime thread\n");
   printf("   -q              Quiet mode (supress output)\n");
   printf("   -r              Connect to Asterisk on this machine\n");
   printf("   -v              Increase verbosity (multiple v's = more verbose)\n");
   printf("   -x <cmd>        Execute command <cmd> (only valid with -r)\n");
   printf("\n");
   return 0;
}

static void ast_readconfig(void) {
   struct ast_config *cfg;
   struct ast_variable *v;
   char *config = ASTCONFPATH;

   if (option_overrideconfig == 1) {
       cfg = ast_load((char *)ast_config_AST_CONFIG_FILE);
   } else {
       cfg = ast_load(config);
   }

   /* init with buildtime config */
   strncpy((char *)ast_config_AST_CONFIG_DIR,AST_CONFIG_DIR,sizeof(ast_config_AST_CONFIG_DIR)-1);
   strncpy((char *)ast_config_AST_SPOOL_DIR,AST_SPOOL_DIR,sizeof(ast_config_AST_SPOOL_DIR)-1);
   strncpy((char *)ast_config_AST_MODULE_DIR,AST_MODULE_DIR,sizeof(ast_config_AST_VAR_DIR)-1);
   strncpy((char *)ast_config_AST_VAR_DIR,AST_VAR_DIR,sizeof(ast_config_AST_VAR_DIR)-1);
   strncpy((char *)ast_config_AST_LOG_DIR,AST_LOG_DIR,sizeof(ast_config_AST_LOG_DIR)-1);
   strncpy((char *)ast_config_AST_AGI_DIR,AST_AGI_DIR,sizeof(ast_config_AST_AGI_DIR)-1);
   strncpy((char *)ast_config_AST_DB,AST_DB,sizeof(ast_config_AST_DB)-1);
   strncpy((char *)ast_config_AST_KEY_DIR,AST_KEY_DIR,sizeof(ast_config_AST_KEY_DIR)-1);
   strncpy((char *)ast_config_AST_PID,AST_PID,sizeof(ast_config_AST_PID)-1);
   strncpy((char *)ast_config_AST_SOCKET,AST_SOCKET,sizeof(ast_config_AST_SOCKET)-1);
   strncpy((char *)ast_config_AST_RUN_DIR,AST_RUN_DIR,sizeof(ast_config_AST_RUN_DIR)-1);
   
   /* no asterisk.conf? no problem, use buildtime config! */
   if (!cfg) {
       return;
   }
   v = ast_variable_browse(cfg, "directories");
   while(v) {
      if (!strcasecmp(v->name, "astetcdir")) {
          strncpy((char *)ast_config_AST_CONFIG_DIR,v->value,sizeof(ast_config_AST_CONFIG_DIR)-1);
      } else if (!strcasecmp(v->name, "astspooldir")) {
          strncpy((char *)ast_config_AST_SPOOL_DIR,v->value,sizeof(ast_config_AST_SPOOL_DIR)-1);
      } else if (!strcasecmp(v->name, "astvarlibdir")) {
          strncpy((char *)ast_config_AST_VAR_DIR,v->value,sizeof(ast_config_AST_VAR_DIR)-1);
          snprintf((char *)ast_config_AST_DB,sizeof(ast_config_AST_DB)-1,"%s/%s",v->value,"astdb");    
      } else if (!strcasecmp(v->name, "astlogdir")) {
          strncpy((char *)ast_config_AST_LOG_DIR,v->value,sizeof(ast_config_AST_LOG_DIR)-1);
      } else if (!strcasecmp(v->name, "astagidir")) {
          strncpy((char *)ast_config_AST_AGI_DIR,v->value,sizeof(ast_config_AST_AGI_DIR)-1);
      } else if (!strcasecmp(v->name, "astrundir")) {
          snprintf((char *)ast_config_AST_PID,sizeof(ast_config_AST_PID)-1,"%s/%s",v->value,"asterisk.pid");    
          snprintf((char *)ast_config_AST_SOCKET,sizeof(ast_config_AST_SOCKET)-1,"%s/%s",v->value,"asterisk.ctl");    
          strncpy((char *)ast_config_AST_RUN_DIR,v->value,sizeof(ast_config_AST_RUN_DIR)-1);
      } else if (!strcasecmp(v->name, "astmoddir")) {
          strncpy((char *)ast_config_AST_MODULE_DIR,v->value,sizeof(ast_config_AST_MODULE_DIR)-1);
      }
      v = v->next;
   }
   ast_destroy(cfg);
}

int main(int argc, char *argv[])
{
   int c;
   char filename[80] = "";
   char hostname[256];
   char tmp[80];
   char * xarg = NULL;
   int x;
   FILE *f;
   sigset_t sigs;
   int num;
   char *buf;

   /* Remember original args for restart */
   if (argc > sizeof(_argv) / sizeof(_argv[0]) - 1) {
      fprintf(stderr, "Truncating argument size to %d\n", sizeof(_argv) / sizeof(_argv[0]) - 1);
      argc = sizeof(_argv) / sizeof(_argv[0]) - 1;
   }
   for (x=0;x<argc;x++)
      _argv[x] = argv[x];
   _argv[x] = NULL;

   /* if the progname is rasterisk consider it a remote console */
   if ( argv[0] && (strstr(argv[0], "rasterisk")) != NULL)  {
      option_remote++;
      option_nofork++;
   }
   if (gethostname(hostname, sizeof(hostname)))
      strncpy(hostname, "<Unknown>", sizeof(hostname)-1);
   ast_mainpid = getpid();
   ast_ulaw_init();
   ast_alaw_init();
   callerid_init();
   tdd_init();
   if (getenv("HOME")) 
      snprintf(filename, sizeof(filename), "%s/.asterisk_history", getenv("HOME"));
   /* Check if we're root */
   /*
   if (geteuid()) {
      ast_log(LOG_ERROR, "Must be run as root\n");
      exit(1);
   }
   */
   /* Check for options */
   while((c=getopt(argc, argv, "hfdvqprgcinx:C:")) != -1) {
      switch(c) {
      case 'd':
         option_debug++;
         option_nofork++;
         break;
      case 'c':
         option_console++;
         option_nofork++;
         break;
      case 'f':
         option_nofork++;
         break;
      case 'n':
         option_nocolor++;
         break;
      case 'r':
         option_remote++;
         option_nofork++;
         break;
      case 'p':
         option_highpriority++;
         break;
      case 'v':
         option_verbose++;
         option_nofork++;
         break;
      case 'q':
         option_quiet++;
         break;
      case 'x':
         option_exec++;
         xarg = optarg;
         break;
      case 'C':
         strncpy((char *)ast_config_AST_CONFIG_FILE,optarg,sizeof(ast_config_AST_CONFIG_FILE));
         option_overrideconfig++;
         break;
      case 'i':
         option_initcrypto++;
         break;
      case'g':
         option_dumpcore++;
         break;
      case 'h':
         show_cli_help();
         exit(0);
      case '?':
         exit(1);
      }
   }

   if (option_dumpcore) {
      struct rlimit l;
      memset(&l, 0, sizeof(l));
      l.rlim_cur = RLIM_INFINITY;
      l.rlim_max = RLIM_INFINITY;
      if (setrlimit(RLIMIT_CORE, &l)) {
         ast_log(LOG_WARNING, "Unable to disable core size resource limit: %s\n", strerror(errno));
      }
   }

   term_init();
   printf(term_end());
   fflush(stdout);
   if (option_console && !option_verbose) 
      ast_verbose("[ Reading Master Configuration ]");
   ast_readconfig();

   if (option_console) {
                if (el_hist == NULL || el == NULL)
                        ast_el_initialize();

                if (!ast_strlen_zero(filename))
                        ast_el_read_history(filename);
   }

   if (ast_tryconnect()) {
      /* One is already running */
      if (option_remote) {
         if (option_exec) {
            ast_remotecontrol(xarg);
            quit_handler(0, 0, 0, 0);
            exit(0);
         }
         printf(term_quit());
         ast_register_verbose(console_verboser);
         ast_verbose( "Asterisk " ASTERISK_VERSION ", Copyright (C) 1999-2004 Digium.\n");
         ast_verbose( "Written by Mark Spencer <markster@digium.com>\n");
         ast_verbose( "=========================================================================\n");
         ast_remotecontrol(NULL);
         quit_handler(0, 0, 0, 0);
         exit(0);
      } else {
         ast_log(LOG_ERROR, "Asterisk already running on %s.  Use 'asterisk -r' to connect.\n", (char *)ast_config_AST_SOCKET);
         printf(term_quit());
         exit(1);
      }
   } else if (option_remote || option_exec) {
      ast_log(LOG_ERROR, "Unable to connect to remote asterisk\n");
      printf(term_quit());
      exit(1);
   }
   /* Blindly write pid file since we couldn't connect */
   unlink((char *)ast_config_AST_PID);
   f = fopen((char *)ast_config_AST_PID, "w");
   if (f) {
      fprintf(f, "%d\n", getpid());
      fclose(f);
   } else
      ast_log(LOG_WARNING, "Unable to open pid file '%s': %s\n", (char *)ast_config_AST_PID, strerror(errno));

   if (!option_verbose && !option_debug && !option_nofork && !option_console) {
      daemon(0,0);
      /* Blindly re-write pid file since we are forking */
      unlink((char *)ast_config_AST_PID);
      f = fopen((char *)ast_config_AST_PID, "w");
      if (f) {
         fprintf(f, "%d\n", getpid());
         fclose(f);
      } else
         ast_log(LOG_WARNING, "Unable to open pid file '%s': %s\n", (char *)ast_config_AST_PID, strerror(errno));
   }

   ast_makesocket();
   sigemptyset(&sigs);
   sigaddset(&sigs, SIGHUP);
   sigaddset(&sigs, SIGTERM);
   sigaddset(&sigs, SIGINT);
   sigaddset(&sigs, SIGPIPE);
   sigaddset(&sigs, SIGWINCH);
   pthread_sigmask(SIG_BLOCK, &sigs, NULL);
   if (option_console || option_verbose || option_remote)
      ast_register_verbose(console_verboser);
   /* Print a welcome message if desired */
   if (option_verbose || option_console) {
      ast_verbose( "Asterisk " ASTERISK_VERSION ", Copyright (C) 1999-2004 Digium.\n");
      ast_verbose( "Written by Mark Spencer <markster@digium.com>\n");
      ast_verbose( "=========================================================================\n");
   }
   if (option_console && !option_verbose) 
      ast_verbose("[ Booting...");

   signal(SIGURG, urg_handler);
   signal(SIGINT, __quit_handler);
   signal(SIGTERM, __quit_handler);
   signal(SIGHUP, hup_handler);
   signal(SIGCHLD, child_handler);
   signal(SIGPIPE, SIG_IGN);

   if (set_priority(option_highpriority)) {
      printf(term_quit());
      exit(1);
   }
   if (init_logger()) {
      printf(term_quit());
      exit(1);
   }
   if (init_manager()) {
      printf(term_quit());
      exit(1);
   }
   ast_rtp_init();
   if (ast_image_init()) {
      printf(term_quit());
      exit(1);
   }
   if (load_pbx()) {
      printf(term_quit());
      exit(1);
   }
   if (load_modules()) {
      printf(term_quit());
      exit(1);
   }
   if (init_framer()) {
      printf(term_quit());
      exit(1);
   }
   if (astdb_init()) {
      printf(term_quit());
      exit(1);
   }
   if (ast_enum_init()) {
      printf(term_quit());
      exit(1);
   }
   /* We might have the option of showing a console, but for now just
      do nothing... */
   if (option_console && !option_verbose)
      ast_verbose(" ]\n");
   if (option_verbose || option_console)
      ast_verbose(term_color(tmp, "Asterisk Ready.\n", COLOR_BRWHITE, COLOR_BLACK, sizeof(tmp)));
   if (option_nofork)
      consolethread = pthread_self();
   fully_booted = 1;
   pthread_sigmask(SIG_UNBLOCK, &sigs, NULL);
#ifdef __AST_DEBUG_MALLOC
   __ast_mm_init();
#endif   
   time(&ast_startuptime);
   ast_cli_register(&astshutdownnow);
   ast_cli_register(&astshutdowngracefully);
   ast_cli_register(&astrestartnow);
   ast_cli_register(&astrestartgracefully);
   ast_cli_register(&astrestartwhenconvenient);
   ast_cli_register(&astshutdownwhenconvenient);
   ast_cli_register(&aborthalt);
   ast_cli_register(&astbang);
   if (option_console) {
      /* Console stuff now... */
      /* Register our quit function */
      char title[256];
      set_icon("Asterisk");
      snprintf(title, sizeof(title), "Asterisk Console on '%s' (pid %d)", hostname, ast_mainpid);
      set_title(title);
       ast_cli_register(&quit);
       ast_cli_register(&astexit);

      for (;;) {
         buf = (char *)el_gets(el, &num);
         if (buf) {
            if (buf[strlen(buf)-1] == '\n')
               buf[strlen(buf)-1] = '\0';

            consolehandler((char *)buf);
         } else {
            if (option_remote)
               ast_cli(STDOUT_FILENO, "\nUse EXIT or QUIT to exit the asterisk console\n");
         }
      }

   } else {
      /* Do nothing */
      for(;;) 
         poll(NULL,0, -1);
   }
   return 0;
}

---