Use an array of browser launchers instead of boilerplate code in update_default_browser()
[browser-switch] / 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 }