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 #ifdef FREMANTLE
  53         /* continuous mode is required on Fremantle */
  54         ctx.continuous_mode = 1;
  55         if (!cfg.continuous_mode)
  56                 log_msg("WARNING: continuous_mode = 0 operation no longer supported, ignoring config setting");
  57 #else
  58         ctx.continuous_mode = cfg.continuous_mode;
  59 #endif
  60         free(ctx.other_browser_cmd);
  61         if (cfg.other_browser_cmd) {
  62                 if (!(ctx.other_browser_cmd = strdup(cfg.other_browser_cmd))) {
  63                         log_perror(errno, "Failed to set other_browser_cmd");
  64                         exit(1);
  65                 }
  66         } else
  67                 ctx.other_browser_cmd = NULL;
  68         update_default_browser(&ctx, cfg.default_browser);
  69
  70         log_msg("continuous_mode: %d\n", cfg.continuous_mode);
  71         log_msg("default_browser: '%s'\n", cfg.default_browser);
  72         log_msg("other_browser_cmd: '%s'\n",
  73                 cfg.other_browser_cmd?cfg.other_browser_cmd:"NULL");
  74         log_msg("logging: '%s'\n", cfg.logging);
  75
  76         swb_config_free(&cfg);
  77         return;
  78 }
  79
  80 int main() {
  81         OssoBrowser *obj_osso_browser, *obj_osso_browser_req;
  82         GMainLoop *mainloop;
  83         GError *error = NULL;
  84         int reqname_result;
  85
  86         read_config(0);
  87
  88         if (ctx.continuous_mode) {
  89                 /* Install signal handlers */
  90                 struct sigaction act;
  91                 act.sa_flags = SA_RESTART;
  92                 sigemptyset(&(act.sa_mask));
  93
  94                 /* SIGCHLD -- clean up after zombies */
  95                 act.sa_handler = waitforzombies;
  96                 if (sigaction(SIGCHLD, &act, NULL) == -1) {
  97                         log_msg("Installing signal handler failed\n");
  98                         return 1;
  99                 }
 100
 101                 /* SIGHUP -- reread config file */
 102                 act.sa_handler = read_config;
 103                 if (sigaction(SIGHUP, &act, NULL) == -1) {
 104                         log_msg("Installing signal handler failed\n");
 105                         return 1;
 106                 }
 107         }
 108
 109         g_type_init();
 110
 111         dbus_g_object_type_install_info(OSSO_BROWSER_TYPE,
 112                         &dbus_glib_osso_browser_object_info);
 113
 114         /* Get a connection to the D-Bus session bus */
 115         ctx.session_bus = dbus_g_bus_get(DBUS_BUS_SESSION, &error);
 116         if (!ctx.session_bus) {
 117                 log_msg("Couldn't get a D-Bus bus connection\n");
 118                 return 1;
 119         }
 120         ctx.dbus_proxy = dbus_g_proxy_new_for_name(ctx.session_bus,
 121                         "org.freedesktop.DBus", "/org/freedesktop/DBus",
 122                         "org.freedesktop.DBus");
 123         if (!ctx.dbus_proxy) {
 124                 log_msg("Couldn't get an org.freedesktop.DBus proxy\n");
 125                 return 1;
 126         }
 127
 128         /* Get the org.maemo.garage.browser-switchboard name from D-Bus, as
 129            a form of locking to ensure that not more than one
 130            browser-switchboard process is active at any time.  With
 131            DBUS_NAME_FLAG_DO_NOT_QUEUE set and DBUS_NAME_FLAG_REPLACE_EXISTING
 132            not set, getting the name succeeds if and only if no other
 133            process owns the name. */
 134         if (!dbus_g_proxy_call(ctx.dbus_proxy, "RequestName", &error,
 135                                G_TYPE_STRING, "org.maemo.garage.browser-switchboard",
 136                                G_TYPE_UINT, DBUS_NAME_FLAG_DO_NOT_QUEUE,
 137                                G_TYPE_INVALID,
 138                                G_TYPE_UINT, &reqname_result,
 139                                G_TYPE_INVALID)) {
 140                 log_msg("Couldn't acquire browser-switchboard lock: %s\n",
 141                         error->message);
 142                 return 1;
 143         }
 144         if (reqname_result != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) {
 145                 log_msg("Another browser-switchboard already running\n");
 146                 return 1;
 147         }
 148
 149         dbus_request_osso_browser_name(&ctx);
 150
 151         /* Register ourselves to handle the osso_browser D-Bus methods */
 152         obj_osso_browser = g_object_new(OSSO_BROWSER_TYPE, NULL);
 153         obj_osso_browser_req = g_object_new(OSSO_BROWSER_TYPE, NULL);
 154         dbus_g_connection_register_g_object(ctx.session_bus,
 155                         "/com/nokia/osso_browser", G_OBJECT(obj_osso_browser));
 156         dbus_g_connection_register_g_object(ctx.session_bus,
 157                         "/com/nokia/osso_browser/request",
 158                         G_OBJECT(obj_osso_browser_req));
 159
 160         mainloop = g_main_loop_new(NULL, FALSE);
 161         log_msg("Starting main loop\n");
 162         g_main_loop_run(mainloop);
 163         log_msg("Main loop completed\n");
 164
 165         return 0;
 166 }