/* -*- mode: C; c-file-style: "gnu" -*- */

/* main.c  main() for message bus

 *

 * Copyright (C) 2003  CodeFactory AB

 * Copyright (C) 2003  Red Hat, Inc.

 * Copyright (C) 2004  Imendio HB

 * Portion Copyright © 2008 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.

 *

 * Licensed under the Academic Free License version 2.1

 * 

 * 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

 *

 */ 

#include "bus.h"

#include "driver.h"

#ifndef __SYMBIAN32__

#include <dbus/dbus-internals.h>

#include <dbus/dbus-watch.h>

#else

#include "dbus-internals.h"

#include "dbus-watch.h"

#endif //__SYMBIAN32__

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#ifndef __SYMBIAN32__

#include <signal.h>

#endif

#include <errno.h>

#include "selinux.h"

static BusContext *context;

static int reload_pipe[2];

#define RELOAD_READ_END 0

#define RELOAD_WRITE_END 1

#ifdef __SYMBIAN32__

#if 0 

 #include <fcntl.h>

int lock_file()

{

       /*

       struct flock {

	off_t	l_start;	 starting offset 

	off_t	l_len;		 len = 0 means until end of file 

	pid_t	l_pid;		 lock owner 

	short	l_type;		 lock type: read/write, etc. 

	short	l_whence;	 type of l_start 

};

 l_type   l_whence  l_start  l_len  l_pid   */

    //	struct flock fl = { F_WRLCK, SEEK_SET, 0,       0,     0 };

    //	struct flock fl = { 0, 0, 0,F_WRLCK, SEEK_SET};

    	int fd;

      //  fl.l_pid = getpid();

    	if ((fd = open(DBUS_LOCK_FILE, O_RDWR|O_CREAT|O_EXCL, 0666)) == -1) 

    	{

    //	perror("open file status");

    	return 0;

    	}

   /* fcntl file lock not supported in openc 	

    	if (fcntl(fd, F_SETLKW, &fl) == -1) {

    		perror("fcntl");

		close(fd);

    		return 0;

    	}

   */ 	

    close(fd);

	return 1;

}

#endif

#endif

void

signal_handler (int sig)

{

#ifndef __SYMBIAN32__

  DBusString str;

  switch (sig)

    {

#ifdef DBUS_BUS_ENABLE_DNOTIFY_ON_LINUX 

    case SIGIO: 

      /* explicit fall-through */

#endif /* DBUS_BUS_ENABLE_DNOTIFY_ON_LINUX  */

    case SIGHUP:

      _dbus_string_init_const (&str, "foo");

      if (!_dbus_write_socket (reload_pipe[RELOAD_WRITE_END], &str, 0, 1))

	{

	  _dbus_warn ("Unable to write to reload pipe.\n");

	  exit (1);

	}

      break;

    case SIGTERM:

      _dbus_loop_quit (bus_context_get_loop (context));

      break;

    }

#endif

}

static void

usage (void)

{

  fprintf (stderr, DAEMON_NAME " [--version] [--session] [--system] [--config-file=FILE] [--print-address[=DESCRIPTOR]] [--print-pid[=DESCRIPTOR]] [--fork] [--nofork] [--introspect]\n");

  exit (1);

}

static void

version (void)

{

  printf ("D-Bus Message Bus Daemon %s\n"

          "Copyright (C) 2002, 2003 Red Hat, Inc., CodeFactory AB, and others\n"

          "This is free software; see the source for copying conditions.\n"

          "There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n",

          VERSION);

  exit (0);

}

static void

introspect (void)

{

  DBusString xml;

  const char *v_STRING;  

  if (!_dbus_string_init (&xml))

    goto oom;

  if (!bus_driver_generate_introspect_string (&xml))

    {

      _dbus_string_free (&xml);

      goto oom;

    }

  v_STRING = _dbus_string_get_const_data (&xml);

  printf ("%s\n", v_STRING); 

  exit (0);

 oom:

  _dbus_warn ("Can not introspect - Out of memory\n");

  exit (1);

}

static void

check_two_config_files (const DBusString *config_file,

                        const char       *extra_arg)

{

  if (_dbus_string_get_length (config_file) > 0)

    {

      fprintf (stderr, "--%s specified but configuration file %s already requested\n",

               extra_arg, _dbus_string_get_const_data (config_file));

      exit (1);

    }

}

static void

check_two_addr_descriptors (const DBusString *addr_fd,

                            const char       *extra_arg)

{

  if (_dbus_string_get_length (addr_fd) > 0)

    {

      fprintf (stderr, "--%s specified but printing address to %s already requested\n",

               extra_arg, _dbus_string_get_const_data (addr_fd));

      exit (1);

    }

}

static void

check_two_pid_descriptors (const DBusString *pid_fd,

                           const char       *extra_arg)

{

  if (_dbus_string_get_length (pid_fd) > 0)

    {

      fprintf (stderr, "--%s specified but printing pid to %s already requested\n",

               extra_arg, _dbus_string_get_const_data (pid_fd));

      exit (1);

    }

}

static dbus_bool_t

handle_reload_watch (DBusWatch    *watch,

		     unsigned int  flags,

		     void         *data)

{

  DBusError error;

  DBusString str;

  _dbus_string_init (&str);

  if (_dbus_read_socket (reload_pipe[RELOAD_READ_END], &str, 1) != 1)

    {

      _dbus_warn ("Couldn't read from reload pipe.\n");

      exit (1);

    }

  _dbus_string_free (&str);

  dbus_error_init (&error);

  if (! bus_context_reload_config (context, &error))

    {

      _dbus_warn ("Unable to reload configuration: %s\n",

		  error.message);

      dbus_error_free (&error);

      exit (1);

    }

  return TRUE;

}

static dbus_bool_t

reload_watch_callback (DBusWatch    *watch,

		       unsigned int  condition,

		       void         *data)

{

  return dbus_watch_handle (watch, condition);

}

static void

setup_reload_pipe (DBusLoop *loop)

{

  DBusError error;

  DBusWatch *watch;

  dbus_error_init (&error);

  if (!_dbus_full_duplex_pipe (&reload_pipe[0], &reload_pipe[1],

			       TRUE, &error))

    {

      _dbus_warn ("Unable to create reload pipe: %s\n",

		  error.message);

      dbus_error_free (&error);

      exit (1);

    }

  _dbus_fd_set_close_on_exec (reload_pipe[0]);

  _dbus_fd_set_close_on_exec (reload_pipe[1]);

  watch = _dbus_watch_new (reload_pipe[RELOAD_READ_END],

			   DBUS_WATCH_READABLE, TRUE,

			   handle_reload_watch, NULL, NULL);

  if (watch == NULL)

    {

      _dbus_warn ("Unable to create reload watch: %s\n",

		  error.message);

      dbus_error_free (&error);

      exit (1);

    }

  if (!_dbus_loop_add_watch (loop, watch, reload_watch_callback,

			     NULL, NULL))

    {

      _dbus_warn ("Unable to add reload watch to main loop: %s\n",

		  error.message);

      dbus_error_free (&error);

      exit (1);

    }

}

int

main (int argc, char **argv)

{

  DBusError error;

  DBusString config_file;

  DBusString addr_fd;

  DBusString pid_fd;

  const char *prev_arg;

  int print_addr_fd;

  int print_pid_fd;

  int i;

  dbus_bool_t print_address;

  dbus_bool_t print_pid;

  int force_fork;

  #ifdef __SYMBIAN32__

  char systemconfpath[35];

#endif

 // write(1, "hi daemon", 9); 

  if (!_dbus_string_init (&config_file))

    return 1;

  if (!_dbus_string_init (&addr_fd))

    return 1;

  if (!_dbus_string_init (&pid_fd))

    return 1;

  print_address = FALSE;

  print_pid = FALSE;

  force_fork = FORK_FOLLOW_CONFIG_FILE;

#ifdef __SYMBIAN32__

// Open C Does not have command arguments

// Open C Does not have fork

// force_fork = FORK_NEVER;

// __SYMBIAN32__ uses system dbus only

//  _dbus_string_append (&config_file, DBUS_SYSTEM_CONFIG_FILE);

    systemconfpath[0]= 'z';//Default

 	systemconfpath[0]=getSystemConfDriveLetter();

 	systemconfpath[1]=':';

    systemconfpath[2]='\0';

  strcat(systemconfpath,"\\data\\dbus\\system.conf");

  _dbus_string_append (&config_file, systemconfpath);

  force_fork = FORK_NEVER;

#else

  prev_arg = NULL;

  i = 1;

  while (i < argc)

    {

      const char *arg = argv[i];

      if (strcmp (arg, "--help") == 0 ||

          strcmp (arg, "-h") == 0 ||

          strcmp (arg, "-?") == 0)

        usage ();

      else if (strcmp (arg, "--version") == 0)

        version ();

      else if (strcmp (arg, "--introspect") == 0)

        introspect ();

      else if (strcmp (arg, "--nofork") == 0)

        force_fork = FORK_NEVER;

      else if (strcmp (arg, "--fork") == 0)

        force_fork = FORK_ALWAYS;

      else if (strcmp (arg, "--system") == 0)

        {

          check_two_config_files (&config_file, "system");

          if (!_dbus_string_append (&config_file, DBUS_SYSTEM_CONFIG_FILE))

            exit (1);

        }

      else if (strcmp (arg, "--session") == 0)

        {

          check_two_config_files (&config_file, "session");

          if (!_dbus_string_append (&config_file, DBUS_SESSION_CONFIG_FILE))

            exit (1);

        }

      else if (strstr (arg, "--config-file=") == arg)

        {

          const char *file;

          check_two_config_files (&config_file, "config-file");

          file = strchr (arg, '=');

          ++file;

          if (!_dbus_string_append (&config_file, file))

            exit (1);

        }

      else if (prev_arg &&

               strcmp (prev_arg, "--config-file") == 0)

        {

          check_two_config_files (&config_file, "config-file");

          if (!_dbus_string_append (&config_file, arg))

            exit (1);

        }

      else if (strcmp (arg, "--config-file") == 0)

        ; /* wait for next arg */

      else if (strstr (arg, "--print-address=") == arg)

        {

          const char *desc;

          check_two_addr_descriptors (&addr_fd, "print-address");

          desc = strchr (arg, '=');

          ++desc;

          if (!_dbus_string_append (&addr_fd, desc))

            exit (1);

          print_address = TRUE;

        }

      else if (prev_arg &&

               strcmp (prev_arg, "--print-address") == 0)

        {

          check_two_addr_descriptors (&addr_fd, "print-address");

          if (!_dbus_string_append (&addr_fd, arg))

            exit (1);

          print_address = TRUE;

        }

      else if (strcmp (arg, "--print-address") == 0)

        print_address = TRUE; /* and we'll get the next arg if appropriate */

      else if (strstr (arg, "--print-pid=") == arg)

        {

          const char *desc;

          check_two_pid_descriptors (&pid_fd, "print-pid");

          desc = strchr (arg, '=');

          ++desc;

          if (!_dbus_string_append (&pid_fd, desc))

            exit (1);

          print_pid = TRUE;

        }

      else if (prev_arg &&

               strcmp (prev_arg, "--print-pid") == 0)

        {

          check_two_pid_descriptors (&pid_fd, "print-pid");

          if (!_dbus_string_append (&pid_fd, arg))

            exit (1);

          print_pid = TRUE;

        }

      else if (strcmp (arg, "--print-pid") == 0)

        print_pid = TRUE; /* and we'll get the next arg if appropriate */

      else

        usage ();

      prev_arg = arg;

      ++i;

    }

#endif // else (systems with command line arguments)

  if (_dbus_string_get_length (&config_file) == 0)

    {

      fprintf (stderr, "No configuration file specified.\n");

      usage ();

    }

  print_addr_fd = -1;

  if (print_address)

    {

      print_addr_fd = 1; /* stdout */

      if (_dbus_string_get_length (&addr_fd) > 0)

        {

          long val;

          int end;

          if (!_dbus_string_parse_int (&addr_fd, 0, &val, &end) ||

              end != _dbus_string_get_length (&addr_fd) ||

              val < 0 || val > _DBUS_INT_MAX)

            {

              fprintf (stderr, "Invalid file descriptor: \"%s\"\n",

                       _dbus_string_get_const_data (&addr_fd));

              exit (1);

            }

          print_addr_fd = val;

        }

    }

  _dbus_string_free (&addr_fd);

  print_pid_fd = -1;

  if (print_pid)

    {

      print_pid_fd = 1; /* stdout */

      if (_dbus_string_get_length (&pid_fd) > 0)

        {

          long val;

          int end;

          if (!_dbus_string_parse_int (&pid_fd, 0, &val, &end) ||

              end != _dbus_string_get_length (&pid_fd) ||

              val < 0 || val > _DBUS_INT_MAX)

            {

              fprintf (stderr, "Invalid file descriptor: \"%s\"\n",

                       _dbus_string_get_const_data (&pid_fd));

              exit (1);

            }

          print_pid_fd = val;

        }

    }

  _dbus_string_free (&pid_fd);

  #ifdef __SYMBIAN32__

  print_addr_fd=1;

 /*uncomment above line, if the bus address needs to be sent to the client starting the bus*/

 /* one more work around could be to write the address of the bus in the dbus_lock file, which can be read 

 from the client program if needed */

  #endif

  if (!bus_selinux_pre_init ())

    {

      _dbus_warn ("SELinux pre-initialization failed\n");

      exit (1);

    }

  dbus_error_init (&error);

  context = bus_context_new (&config_file, force_fork,

                             print_addr_fd, print_pid_fd,

                             &error);

  _dbus_string_free (&config_file);

  if (context == NULL)

    {

      _dbus_warn ("Failed to start message bus: %s\n",

                  error.message);

      dbus_error_free (&error);

      exit (1);

    }

  #ifndef __SYMBIAN32__

setup_reload_pipe (bus_context_get_loop (context));

  _dbus_set_signal_handler (SIGHUP, signal_handler);

  _dbus_set_signal_handler (SIGTERM, signal_handler);

  #endif

#ifdef DBUS_BUS_ENABLE_DNOTIFY_ON_LINUX 

  _dbus_set_signal_handler (SIGIO, signal_handler);

#endif /* DBUS_BUS_ENABLE_DNOTIFY_ON_LINUX */

  _dbus_verbose ("We are on D-Bus...\n");

#ifdef __SYMBIAN32__  

  lock_file();

#endif  

 _dbus_loop_run (bus_context_get_loop (context));

#ifdef __SYMBIAN32__    

  remove(DBUS_LOCK_FILE);

#endif  

  bus_context_shutdown (context);

  bus_context_unref (context);

  bus_selinux_shutdown ();

  return 0;

}