src/ui-gnome.c

   1 /* $Id$
   2  * Gnome user interface
   3  * Copyright (C) 2004 Jan Kratochvil <project-udpforward@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 "ui-gnome.h"   /* self */
  23 #include <glib/gmessages.h>
  24 #include "main.h"
  25 #include <libgnomeui/gnome-app.h>
  26 #include <sys/types.h>
  27 #include <signal.h>
  28 #include <stdio.h>
  29 #include <errno.h>
  30 #include <libgnomeui/gnome-appbar.h>
  31 #include <gtk/gtkbutton.h>
  32 #include <unistd.h>
  33 #include <stdlib.h>
  34 #include <gtk/gtkentry.h>
  35 #include <gtk/gtktogglebutton.h>
  36 #include <string.h>
  37 #include <gtk/gtkmain.h>
  38
  39
  40 /* Config: */
  41 #define PATHNAME_PID "/var/run/udpforward.pid"
  42 #define DAEMON_CHECK_INTERVAL_MS 500
  43 #define PORT_RANGE_BEGIN 2048
  44 #define PORT_RANGE_END 10240
  45
  46
  47 static GnomeApp *App;
  48 static GtkButton *ButtonStart;
  49 static GtkButton *ButtonStop;
  50 static GtkHBox *PortHBox;
  51 static GnomeAppBar *AppBar;
  52 static GtkEntry *PortEntry;
  53
  54
  55 static pid_t daemon_pid;
  56
  57 static gboolean is_daemon_running(void)
  58 {
  59 FILE *f;
  60 char buf[LINE_MAX],*got;
  61 int pid_int;
  62
  63         daemon_pid=(pid_t)-1;
  64         if (!(f=fopen(PATHNAME_PID,"r")))
  65                 goto err;
  66         got=fgets(buf,sizeof(buf),f);
  67         fclose(f);      /* FIXME: error ignored */
  68         if (got!=buf) {
  69 err_unlink:
  70                 unlink(PATHNAME_PID);
  71 err:
  72                 return FALSE;
  73                 }
  74         pid_int=atoi(buf);
  75         if (pid_int<=1)
  76                 goto err_unlink;
  77         if (kill((pid_t)pid_int,0)) {
  78                 if (errno==ESRCH)
  79                         goto err_unlink;
  80                 goto err;
  81                 }
  82         daemon_pid=(pid_t)pid_int;
  83         return TRUE;
  84 }
  85
  86 static void state_start_stop(void)
  87 {
  88 gboolean daemon_running;
  89
  90         daemon_running=is_daemon_running();
  91         gtk_widget_set_sensitive(GTK_WIDGET(ButtonStart),!daemon_running);
  92         gtk_widget_set_sensitive(GTK_WIDGET(ButtonStop) , daemon_running);
  93         gtk_widget_set_sensitive(GTK_WIDGET(PortHBox)   ,!daemon_running);
  94         if (daemon_running)
  95                 gnome_appbar_set_status(AppBar,
  96                                 udpforward_printf_alloca(_("udpforward daemon running as PID %d."),(int)daemon_pid));
  97         else
  98                 gnome_appbar_set_status(AppBar,_("No udpforward daemon currently running."));
  99 }
 100
 101 static gboolean daemon_check_timeout_func(gpointer data /* unused */)
 102 {
 103         state_start_stop();
 104         return TRUE;    /* continue running */
 105 }
 106
 107 void on_PortButtonRandom_clicked(GtkButton *button,gpointer user_data)
 108 {
 109         g_return_if_fail(GTK_IS_BUTTON(button));
 110
 111         state_start_stop();
 112         if ((pid_t)-1!=daemon_pid)
 113                 return;
 114         gtk_entry_set_text(PortEntry,
 115                         udpforward_printf_alloca("%d",(int)g_random_int_range(PORT_RANGE_BEGIN,PORT_RANGE_END)));
 116 }
 117
 118 void on_AutostartCheckButton_toggled(GtkToggleButton *togglebutton,gpointer user_data)
 119 {
 120         g_return_if_fail(GTK_IS_TOGGLE_BUTTON(togglebutton));
 121 }
 122
 123 void on_ButtonStart_clicked(GtkButton *button,gpointer user_data)
 124 {
 125         g_return_if_fail(GTK_IS_BUTTON(button));
 126
 127         state_start_stop();
 128         if ((pid_t)-1!=daemon_pid)
 129                 return;
 130 }
 131
 132 void on_ButtonStop_clicked(GtkButton *button,gpointer user_data)
 133 {
 134 int errno_save;
 135
 136         g_return_if_fail(GTK_IS_BUTTON(button));
 137
 138         state_start_stop();
 139         if ((pid_t)-1==daemon_pid)
 140                 return;
 141         errno=0;
 142         kill(daemon_pid,SIGKILL);
 143         errno_save=errno;
 144         if (errno_save)
 145                 g_warning(udpforward_printf_alloca(_("Unable to stop the daemon at PID %d: %s"),
 146                                 (int)daemon_pid,strerror(errno_save)));
 147 }
 148
 149 void on_ButtonHide_clicked(GtkButton *button,gpointer user_data)
 150 {
 151         g_return_if_fail(GTK_IS_BUTTON(button));
 152
 153         gtk_main_quit();
 154 }
 155
 156 /* of "ui-gnome-interface.h": */
 157 GtkWidget *create_App(void);
 158 /* of "ui-gnome-support.h": */
 159 GtkWidget *lookup_widget(GtkWidget *widget,const gchar *widget_name);
 160
 161 gboolean ui_gnome_init(void)
 162 {
 163         App=GNOME_APP(create_App());
 164
 165         ButtonStart=GTK_BUTTON(lookup_widget(GTK_WIDGET(App),"ButtonStart"));
 166         ButtonStop=GTK_BUTTON(lookup_widget(GTK_WIDGET(App),"ButtonStop"));
 167         PortHBox=GTK_HBOX(lookup_widget(GTK_WIDGET(App),"PortHBox"));
 168         AppBar=GNOME_APPBAR(lookup_widget(GTK_WIDGET(App),"AppBar"));
 169         PortEntry=GTK_ENTRY(lookup_widget(GTK_WIDGET(App),"PortEntry"));
 170
 171         gtk_widget_show_all(GTK_WIDGET(App));
 172         g_timeout_add(
 173                         DAEMON_CHECK_INTERVAL_MS,       /* interval */
 174                         daemon_check_timeout_func,      /* function */
 175                         NULL);  /* data; unused */
 176         return TRUE;
 177 }
 178
 179 void ui_gnome_interactive(void)
 180 {
 181         gtk_main();
 182 }