git.maemo.org Git - browser-switch/blob - main.c

   1 /*
   2  * main.c -- config file parsing and main loop for browser-switchboard
   3  *
   4  * Copyright (C) 2009-2010 Steven Luo
   5  * Derived from a Python implementation by Jason Simpson and Steven Luo
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  20  * USA.
  21  */
  22
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <signal.h>
  26 #include <errno.h>
  27 #include <sys/types.h>
  28 #include <sys/wait.h>
  29 #include <dbus/dbus-glib.h>
  30
  31 #include "browser-switchboard.h"
  32 #include "launcher.h"
  33 #include "dbus-server-bindings.h"
  34 #include "config.h"
  35 #include "log.h"
  36
  37 struct swb_context ctx;
  38
  39 static void waitforzombies(int signalnum) {
  40         while (waitpid(-1, NULL, WNOHANG) > 0)
  41                 log_msg("Waited for a zombie\n");
  42 }
  43
  44 static void read_config(int signalnum) {
  45         struct swb_config cfg;
  46
  47         swb_config_init(&cfg);
  48
  49         swb_config_load(&cfg);
  50
  51         log_config(cfg.logging);
  52         ctx.continuous_mode = cfg.continuous_mode;
  53         if (cfg.other_browser_cmd) {
  54                 if (!(ctx.other_browser_cmd = strdup(cfg.other_browser_cmd))) {
  55                         log_perror(errno, "Failed to set other_browser_cmd");
  56                         exit(1);
  57                 }
  58         } else
  59                 ctx.other_browser_cmd = NULL;
  60         update_default_browser(&ctx, cfg.default_browser);
  61
  62         log_msg("continuous_mode: %d\n", cfg.continuous_mode);
  63         log_msg("default_browser: '%s'\n", cfg.default_browser);
  64         log_msg("other_browser_cmd: '%s'\n",
  65                 cfg.other_browser_cmd?cfg.other_browser_cmd:"NULL");
  66         log_msg("logging: '%s'\n", cfg.logging);
  67
  68         swb_config_free(&cfg);
  69         return;
  70 }
  71
  72 int main() {
  73         OssoBrowser *obj_osso_browser, *obj_osso_browser_req;
  74         GMainLoop *mainloop;
  75         GError *error = NULL;
  76         int reqname_result;
  77
  78         read_config(0);
  79
  80         if (ctx.continuous_mode) {
  81                 /* Install signal handlers */
  82                 struct sigaction act;
  83                 act.sa_flags = SA_RESTART;
  84                 sigemptyset(&(act.sa_mask));
  85
  86                 /* SIGCHLD -- clean up after zombies */
  87                 act.sa_handler = waitforzombies;
  88                 if (sigaction(SIGCHLD, &act, NULL) == -1) {
  89                         log_msg("Installing signal handler failed\n");
  90                         return 1;
  91                 }
  92
  93                 /* SIGHUP -- reread config file */
  94                 act.sa_handler = read_config;
  95                 if (sigaction(SIGHUP, &act, NULL) == -1) {
  96                         log_msg("Installing signal handler failed\n");
  97                         return 1;
  98                 }
  99         }
 100
 101         g_type_init();
 102
 103         dbus_g_object_type_install_info(OSSO_BROWSER_TYPE,
 104                         &dbus_glib_osso_browser_object_info);
 105
 106         /* Get a connection to the D-Bus session bus */
 107         ctx.session_bus = dbus_g_bus_get(DBUS_BUS_SESSION, &error);
 108         if (!ctx.session_bus) {
 109                 log_msg("Couldn't get a D-Bus bus connection\n");
 110                 return 1;
 111         }
 112         ctx.dbus_proxy = dbus_g_proxy_new_for_name(ctx.session_bus,
 113                         "org.freedesktop.DBus", "/org/freedesktop/DBus",
 114                         "org.freedesktop.DBus");
 115         if (!ctx.dbus_proxy) {
 116                 log_msg("Couldn't get an org.freedesktop.DBus proxy\n");
 117                 return 1;
 118         }
 119
 120         /* Get the org.maemo.garage.browser-switchboard name from D-Bus, as
 121            a form of locking to ensure that not more than one
 122            browser-switchboard process is active at any time.  With
 123            DBUS_NAME_FLAG_DO_NOT_QUEUE set and DBUS_NAME_FLAG_REPLACE_EXISTING
 124            not set, getting the name succeeds if and only if no other
 125            process owns the name. */
 126         if (!dbus_g_proxy_call(ctx.dbus_proxy, "RequestName", &error,
 127                                G_TYPE_STRING, "org.maemo.garage.browser-switchboard",
 128                                G_TYPE_UINT, DBUS_NAME_FLAG_DO_NOT_QUEUE,
 129                                G_TYPE_INVALID,
 130                                G_TYPE_UINT, &reqname_result,
 131                                G_TYPE_INVALID)) {
 132                 log_msg("Couldn't acquire browser-switchboard lock: %s\n",
 133                         error->message);
 134                 return 1;
 135         }
 136         if (reqname_result != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) {
 137                 log_msg("Another browser-switchboard already running\n");
 138                 return 1;
 139         }
 140
 141         dbus_request_osso_browser_name(&ctx);
 142
 143         /* Register ourselves to handle the osso_browser D-Bus methods */
 144         obj_osso_browser = g_object_new(OSSO_BROWSER_TYPE, NULL);
 145         obj_osso_browser_req = g_object_new(OSSO_BROWSER_TYPE, NULL);
 146         dbus_g_connection_register_g_object(ctx.session_bus,
 147                         "/com/nokia/osso_browser", G_OBJECT(obj_osso_browser));
 148         dbus_g_connection_register_g_object(ctx.session_bus,
 149                         "/com/nokia/osso_browser/request",
 150                         G_OBJECT(obj_osso_browser_req));
 151
 152         mainloop = g_main_loop_new(NULL, FALSE);
 153         log_msg("Starting main loop\n");
 154         g_main_loop_run(mainloop);
 155         log_msg("Main loop completed\n");
 156
 157         return 0;
 158 }