src/main.c

   1 /* $Id$
   2  * UDP Gateway utility
   3  * Copyright (C) 2004 Jan Kratochvil <project-udpgate@jankratochvil.net>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; exactly version 2 of June 1991 is required
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19
  20 #include "config.h"
  21
  22 #include <glib/gmessages.h>
  23 #include <popt.h>
  24 #include <locale.h>
  25 #include <stdlib.h>
  26 #include <glib/gutils.h>
  27 #include <string.h>
  28 #include <setjmp.h>
  29 #include <unistd.h>
  30
  31 #ifdef HAVE_GNOME
  32 #include <libgnome/gnome-program.h>
  33 #include <libgnomeui/gnome-ui-init.h>
  34 #endif
  35
  36 #include "main.h"       /* self */
  37 #include "ui-line.h"
  38 #include "network.h"
  39 #include "configuration.h"
  40
  41 #ifdef HAVE_GNOME
  42 #include "ui-gnome.h"
  43 #endif
  44
  45
  46 /* Config: */
  47 #define LOCAL_PORT_DEFAULT 9201
  48
  49
  50 static int optarg_text;
  51 int optarg_verbose;
  52 int optarg_port=LOCAL_PORT_DEFAULT;
  53 static int optarg_start;
  54 static int optarg_stop;
  55 int optarg_no_fork;
  56
  57 void (*ui_interactive)(void);
  58
  59 static const struct poptOption popt_table[]={
  60
  61 #define UDPGATE_POPT(shortname,longname,argInfoP,argP,valP,descripP,argDescripP) \
  62                 { \
  63                         longName: (longname), \
  64                         shortName: (shortname), \
  65                         argInfo: (argInfoP)|(!(valP) ? 0 : POPT_ARG_VAL), \
  66                         arg: (void *)argP, \
  67                         val: (valP), \
  68                         descrip: (descripP), \
  69                         argDescrip: (argDescripP), \
  70                 }
  71
  72 #ifdef HAVE_GNOME
  73 #define OPT_TEXT_IF_GNOME N_("Disable Gnome UI; --text must be first argument")
  74 #else /* HAVE_GNOME */
  75 #define OPT_TEXT_IF_GNOME N_("(no Gnome UI compiled - stub only); --text must be first argument")
  76 #endif /* HAVE_GNOME */
  77                 UDPGATE_POPT(0  ,"text"   ,POPT_ARG_NONE                          ,&optarg_text   ,0,
  78                                 OPT_TEXT_IF_GNOME,NULL),
  79 #undef OPT_TEXT_IF_GNOME
  80                 UDPGATE_POPT('v',"verbose",POPT_ARG_NONE                          ,&optarg_verbose,0,
  81                                 N_("Display additional debug information"),NULL),
  82                 UDPGATE_POPT('p',"port"   ,POPT_ARG_INT |POPT_ARGFLAG_SHOW_DEFAULT,&optarg_port   ,0,
  83                                 N_("Listen on this UDP port"),NULL),
  84                 UDPGATE_POPT('s',"start"  ,POPT_ARG_NONE                          ,&optarg_start  ,0,
  85                                 N_("Start the daemon"),NULL),
  86                 UDPGATE_POPT('S',"stop"   ,POPT_ARG_NONE                          ,&optarg_stop   ,0,
  87                                 N_("Stop the daemon"),NULL),
  88                 UDPGATE_POPT('1',"no-fork",POPT_ARG_NONE                          ,&optarg_no_fork,0,
  89                                 N_("Do not detach from the current process"),NULL),
  90
  91 #undef UDPGATE_POPT
  92                 POPT_TABLEEND
  93                 };
  94
  95 static const struct poptOption popt_table_autohelp[]={
  96                 { NULL,'\0',POPT_ARG_INCLUDE_TABLE,(struct poptOption *)&popt_table,0,PACKAGE },
  97                 POPT_AUTOHELP
  98                 POPT_TABLEEND
  99                 };
 100
 101
 102 #ifdef HAVE_GNOME
 103 static jmp_buf gnome_init_atexit_jmpbuf;
 104 static gboolean gnome_init_atexit_disable;
 105
 106 static void gnome_init_atexit_handler(void)
 107 {
 108         if (gnome_init_atexit_disable)
 109                 return;
 110
 111         longjmp(gnome_init_atexit_jmpbuf,1);
 112         g_assert_not_reached();
 113         _exit(EXIT_FAILURE);
 114 }
 115
 116 static gboolean gnome_init_g_log_handler_hit;
 117 static void gnome_init_g_log_handler(const gchar *log_domain,GLogLevelFlags log_level,const gchar *message,gpointer user_data)
 118 {
 119         gnome_init_g_log_handler_hit=TRUE;
 120         g_log_default_handler(log_domain,log_level,message,user_data);
 121 }
 122 #endif /* HAVE_GNOME */
 123
 124 int main(int argc,char **argv)
 125 {
 126 poptContext context;
 127 int errint;
 128 gboolean is_interactive;
 129 #ifdef HAVE_GNOME
 130 gboolean no_gnome;
 131 #endif /* HAVE_GNOME */
 132
 133 #if 0
 134         g_log_set_always_fatal(~(0
 135                         |G_LOG_LEVEL_MESSAGE
 136                         |G_LOG_LEVEL_INFO
 137                         |G_LOG_LEVEL_DEBUG
 138                         ));
 139 #endif
 140
 141         /* Initialize the i18n stuff */
 142         setlocale(LC_ALL,"");
 143         bindtextdomain(PACKAGE,LOCALEDIR);
 144         textdomain(PACKAGE);
 145
 146         /* Read it before the command-line parsing to get the default value
 147          * of 'optarg_port' displayable by 'POPT_ARGFLAG_SHOW_DEFAULT'.
 148          */
 149         configuration_read();
 150
 151         if (argv[1] && !strcmp(argv[1],"--text"))
 152                 optarg_text=1;
 153
 154 #ifdef HAVE_GNOME
 155         no_gnome=(optarg_text || !getenv("DISPLAY") || !*getenv("DISPLAY"));
 156
 157         if (no_gnome)
 158 #endif /* HAVE_GNOME */
 159         {
 160                 context=poptGetContext(
 161                                 PACKAGE,        /* name */
 162                                 argc,(/*en-const*/const char **)argv,   /* argc,argv */
 163                                 popt_table_autohelp,    /* options */
 164                                 POPT_CONTEXT_POSIXMEHARDER);    /* flags; && !POPT_CONTEXT_KEEP_FIRST */
 165                 if (context==NULL) {
 166                         g_assert_not_reached(); /* argument recognization args_error */
 167                         return EXIT_FAILURE;
 168                         }
 169                 errint=poptReadDefaultConfig(context,
 170                                 TRUE);  /* useEnv */
 171                 if (errint!=0) {
 172                         g_assert_not_reached(); /* argument recognization args_error */
 173                         return EXIT_FAILURE;
 174                         }
 175                 errint=poptGetNextOpt(context);
 176                 if (errint!=-1)
 177                         g_error(_("Specified option not expected"));
 178                 if (poptPeekArg(context))
 179                         g_error(_("No arguments expected"));
 180                 }
 181 #ifdef HAVE_GNOME
 182         else {
 183 GnomeProgram *gnome_program;
 184 guint handler_id;
 185
 186                 gnome_init_atexit_disable=FALSE;
 187                 g_atexit(gnome_init_atexit_handler);
 188                 gnome_init_g_log_handler_hit=FALSE;
 189                 handler_id=g_log_set_handler(
 190                                 "Gtk",  /* log_domain */
 191                                 G_LOG_LEVEL_WARNING,    /* log_levels */
 192                                 gnome_init_g_log_handler,       /* log_func */
 193                                 NULL);  /* user_data */
 194                 if (!setjmp(gnome_init_atexit_jmpbuf))
 195                         gnome_program=gnome_program_init(PACKAGE,VERSION,LIBGNOMEUI_MODULE,argc,argv,
 196                                         GNOME_PARAM_POPT_TABLE,popt_table,
 197                                         GNOME_PARAM_POPT_FLAGS,(int)POPT_CONTEXT_POSIXMEHARDER,
 198                                         NULL);
 199                 else {
 200                         no_gnome=TRUE;
 201                         /* No message: (udpgate:3693): Gtk-WARNING **: cannot open display:
 202                          * was reported, probably only '--help' message was shown.
 203                          */
 204                         if (!gnome_init_g_log_handler_hit)
 205                                 exit(EXIT_SUCCESS);
 206                         }
 207                 gnome_init_atexit_disable=TRUE;
 208                 g_log_remove_handler(
 209                                 "Gtk",  /* log_domain */
 210                                 handler_id);    /* handler_id */
 211                 }
 212 #endif /* HAVE_GNOME */
 213
 214         is_interactive=(1
 215                         && !optarg_start
 216                         && !optarg_stop);
 217
 218         /* Initialize UI here to catch all GLog errors below. */
 219         if (is_interactive
 220 #ifdef HAVE_GNOME
 221                         && (no_gnome || !ui_gnome_init())
 222 #endif /* HAVE_GNOME */
 223                         && !ui_line_init())
 224                 g_error(_("No UI interface could be initialized"));
 225
 226         if (!is_interactive) {
 227                 if (optarg_stop)
 228                         network_stop();
 229                 if (optarg_start)
 230                         network_start(optarg_port);
 231                 network_detach();
 232                 }
 233         else
 234                 (*ui_interactive)();
 235
 236         configuration_write();
 237
 238         return EXIT_SUCCESS;
 239 }