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#include <cstdio>
#include <unistd.h>
#include <signal.h>
#include <stdexcept>
#include <glib.h>
#include <gconf/gconf.h>
#include <gconf/gconf-client.h>
using namespace std;
static GMainLoop* loop = NULL;
static int print_value(const GConfValue *value, const char *suffix) {
int count = 0;
GSList* cursor = NULL;
if (!value) return 0;
switch (value->type) {
case GCONF_VALUE_STRING:
return printf("%s%s", gconf_value_get_string(value), suffix);
case GCONF_VALUE_INT:
return printf("%d%s", gconf_value_get_int(value), suffix);
case GCONF_VALUE_FLOAT:
return printf("%f%s", gconf_value_get_float(value), suffix);
case GCONF_VALUE_BOOL:
if (gconf_value_get_bool(value))
return printf("true%s", suffix);
return printf("false%s", suffix);
case GCONF_VALUE_LIST:
cursor = gconf_value_get_list(value);
if (g_slist_length (cursor) == 0)
count += printf("%s", suffix);
else for ( ; cursor ; cursor = g_slist_next(cursor))
count += print_value((const GConfValue *) cursor->data, cursor->next ? "," : suffix);
return count;
case GCONF_VALUE_PAIR:
return print_value(gconf_value_get_car(value), ",") +
print_value(gconf_value_get_cdr(value), suffix);
default:
throw exception();
}
return 0;
}
static void on_value_change(GConfClient* /*client*/, guint /*cnxn_id*/, GConfEntry* entry, void* /*user_data*/) {
printf("%s\t", gconf_entry_get_key(entry));
print_value(gconf_entry_get_value(entry), "\n");
}
static void on_sig(int /*signal*/) {
g_main_loop_quit(loop);
}
static gboolean err(GIOChannel* /*source*/, GIOCondition /*condition*/, gpointer /*data*/) {
g_main_loop_quit(loop);
return false;
}
static gboolean set_key(const char *key, const char *val) {
gboolean error = false;
GConfClient *client = gconf_client_get_default();
GConfValue *value = gconf_client_get(client, key, NULL);
GConfValueType type = value ? value->type : GCONF_VALUE_STRING;
gconf_value_free(value);
switch (type) {
case GCONF_VALUE_STRING:
error = !gconf_client_set_string(client, key, val, NULL);
break;
case GCONF_VALUE_INT:
int ival;
error = sscanf(val, "%d", &ival) != 1;
error = error || !gconf_client_set_int(client, key, ival, NULL);
break;
case GCONF_VALUE_FLOAT:
float fval;
error = sscanf(val, "%f", &fval) != 1;
error = error || !gconf_client_set_float(client, key, fval, NULL);
break;
case GCONF_VALUE_BOOL:
error = !gconf_client_set_float(client, key, !g_strcmp0(val, "true"), NULL);
break;
case GCONF_VALUE_LIST:
case GCONF_VALUE_PAIR:
default:
g_critical("Invalid value type!");
error = true;
}
g_object_unref(client);
return !error;
}
static gboolean in(GIOChannel *source, GIOCondition condition, gpointer data) {
gchar *key, *val;
GIOStatus st = g_io_channel_read_line(source, &key, NULL, NULL, NULL);
// Remove the trailing '\n'
for (int i=0 ; key && key[i] ; i++)
if (key[i] == '\n')
key[i] = '\0';
// If we were successful
if (key && st == G_IO_STATUS_NORMAL) {
if (!g_strrstr(key, "\t"))
goto exit;
val = g_strrstr(key, "\t") + 1;
*(val-1) = '\0';
if (!set_key(key, val))
goto exit;
g_free(key);
return true;
}
else if (key && st == G_IO_STATUS_AGAIN) {
g_free(key);
return in(source, condition, data);
}
exit:
g_free(key);
return err(source, condition, data);
}
int main(int argc, char **argv) {
if (argc < 2) return 1;
// Register sighup handler
if (signal(SIGHUP, on_sig) == SIG_ERR || signal(SIGPIPE, on_sig) == SIG_ERR || signal(SIGABRT, on_sig) == SIG_ERR) {
fprintf(stderr, "Unable to trap signals!");
return 2;
}
// Switch stdout to line buffering
if (setvbuf(stdout, NULL, _IOLBF, 0)) {
fprintf(stderr, "Unable to switch stdout to line buffering!");
return 3;
}
// Switch stdin to line buffering
if (setvbuf(stdin, NULL, _IOLBF, 0)) {
fprintf(stderr, "Unable to switch stdin to line buffering!");
return 4;
}
// Init
g_type_init();
// Get the main loop
loop = g_main_loop_new(NULL, false);
// Setup our GIO Channels
GIOChannel* inchan = g_io_channel_unix_new(fileno(stdin));
GIOChannel* outchan = g_io_channel_unix_new(fileno(stdout));
g_io_add_watch(inchan, G_IO_IN, in, NULL);
g_io_add_watch(inchan, G_IO_PRI, in, NULL);
g_io_add_watch(inchan, G_IO_ERR, err, NULL);
g_io_add_watch(inchan, G_IO_HUP, err, NULL);
g_io_add_watch(outchan, G_IO_ERR, err, NULL);
g_io_add_watch(outchan, G_IO_HUP, err, NULL);
// Get GConf client
GConfClient* client = gconf_client_get_default();
// Add server notifications for all keys
for (int i=1 ; i < argc ; i++) {
GConfValue *value;
gconf_client_add_dir(client, argv[i], GCONF_CLIENT_PRELOAD_NONE, NULL);
gconf_client_notify_add(client, argv[i], on_value_change, NULL, NULL, NULL);
value = gconf_client_get(client, argv[i], NULL);
if (value) {
gconf_value_free (value);
gconf_client_notify(client, argv[i]);
} else {
printf("%s\n", argv[i]);
}
}
g_main_loop_run(loop);
// Cleanup
g_object_unref(client);
g_io_channel_shutdown(inchan, FALSE, NULL);
g_io_channel_shutdown(outchan, FALSE, NULL);
g_io_channel_unref(inchan);
g_io_channel_unref(outchan);
g_main_loop_unref(loop);
}
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