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/*
* Copyright (c) 2014 Ian Sutton <ian@kremlin.cc>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <unistd.h>
#include <limits.h>
#include <signal.h>
#include <sys/param.h>
#include <string.h>
#include <glib/gprintf.h>
#include <glib-unix.h>
#include <polkit/polkit.h>
#include "logind-gen.h"
#include "logind.h"
#include "../../polkit-auth.h"
GPtrArray *logind_freeable;
Login1Manager *logind_interf;
GMainLoop *logind_loop;
guint bus_descriptor;
gboolean dbus_interface_exported; /* reliable because of gdbus operational guarantees */
/* --- begin method/property/dbus signal code --- */
/*static gboolean
on_handle_set_hostname(Login1Manager *hn1_passed_interf,
GDBusMethodInvocation *invoc,
const gchar *greet,
gpointer data) {
return FALSE;
}*/
/*const gchar *
our_get_hostname() {
gchar *hostname_buf, *ret;
size_t hostname_divider;
hostname_buf = (gchar*) g_malloc0(MAXHOSTNAMELEN);
ret = (gchar*) g_malloc0(MAXHOSTNAMELEN);
g_ptr_array_add(logind_freeable, hostname_buf);
g_ptr_array_add(logind_freeable, ret);
if(gethostname(hostname_buf, MAXHOSTNAMELEN))
return "";
hostname_divider = strcspn(hostname_buf, ".");
return strncpy(ret, hostname_buf, hostname_divider);
}*/
/* --- end method/property/dbus signal code, begin bus/name handlers --- */
static void logind_on_bus_acquired(GDBusConnection *conn,
const gchar *name,
gpointer user_data) {
g_printf("got bus/name, exporting %s's interface...\n", name);
logind_interf = login1_manager_skeleton_new();
/* attach function pointers to generated struct's method handlers
g_signal_connect(logind_interf, "handle-set-hostname", G_CALLBACK(on_handle_set_hostname), NULL); */
/* set our properties before export
login1_manager_set_hostname(logind_interf, our_get_hostname()); */
if(!g_dbus_interface_skeleton_export(G_DBUS_INTERFACE_SKELETON(logind_interf),
conn,
"/org/freedesktop/login1_manager",
NULL)) {
g_printf("failed to export %s's interface!\n", name);
logind_mem_clean();
} else {
dbus_interface_exported = TRUE;
g_printf("exported %s's interface on the system bus...\n", name);
}
}
static void logind_on_name_acquired(GDBusConnection *conn,
const gchar *name,
gpointer user_data) {
g_printf("success!\n");
}
static void logind_on_name_lost(GDBusConnection *conn,
const gchar *name,
gpointer user_data) {
if(!conn) {
g_printf("failed to connect to the system bus while trying to acquire name '%s': either dbus-daemon isn't running or we don't have permission to push names and/or their interfaces to it.\n", name);
}
g_print("lost name %s, exiting...\n", name);
logind_mem_clean();
}
/* --- end bus/name handlers, begin misc unix functions --- */
/* safe call to clean and then exit
* this stops our GMainLoop sfaely before letting main() return */
void logind_mem_clean() {
g_printf("exiting...\n");
if(dbus_interface_exported)
g_dbus_interface_skeleton_unexport(G_DBUS_INTERFACE_SKELETON(logind_interf));
if(g_main_loop_is_running(logind_loop))
g_main_loop_quit(logind_loop);
}
/* wrapper for glib's unix signal handling; called only once if terminating signal is raised against us */
gboolean unix_sig_terminate_handler(gpointer data) {
g_printf("caught SIGINT/HUP/TERM, exiting\n");
logind_mem_clean();
return G_SOURCE_REMOVE;
}
void set_signal_handlers() {
/* we don't care about its descriptor, we never need to unregister these */
g_unix_signal_add(SIGINT, unix_sig_terminate_handler, NULL);
g_unix_signal_add(SIGHUP, unix_sig_terminate_handler, NULL);
g_unix_signal_add(SIGTERM, unix_sig_terminate_handler, NULL);
}
int main() {
set_signal_handlers();
logind_loop = g_main_loop_new(NULL, TRUE);
logind_freeable = g_ptr_array_new();
bus_descriptor = g_bus_own_name(G_BUS_TYPE_SYSTEM,
"org.freedesktop.login1_manager",
G_BUS_NAME_OWNER_FLAGS_NONE,
logind_on_bus_acquired,
logind_on_name_acquired,
logind_on_name_lost,
NULL,
NULL);
g_main_loop_run(logind_loop);
/* runs until single g_main_loop_quit() call is raised inside <interface>_mem_clean() */
g_main_loop_unref(logind_loop);
/* guaranteed unownable */
g_bus_unown_name(bus_descriptor);
/* at this point no operations can occur with our data, it is safe to free it + its container */
g_ptr_array_free(logind_freeable, TRUE);
return 0;
}
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