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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <glib-unix.h>
#include "status.h"
static GMainLoop *loop;
static int exit_status = EXIT_SUCCESS;
static int from_dm_fd = -1, to_dm_fd = -1;
static GKeyFile *config;
static void
quit (int status)
{
exit_status = status;
g_main_loop_quit (loop);
}
static gboolean
sigint_cb (gpointer user_data)
{
status_notify ("UNITY-SYSTEM-COMPOSITOR TERMINATE SIGNAL=%d", SIGINT);
quit (EXIT_SUCCESS);
return TRUE;
}
static gboolean
sigterm_cb (gpointer user_data)
{
status_notify ("UNITY-SYSTEM-COMPOSITOR TERMINATE SIGNAL=%d", SIGTERM);
quit (EXIT_SUCCESS);
return TRUE;
}
typedef enum
{
USC_MESSAGE_PING = 0,
USC_MESSAGE_PONG = 1,
USC_MESSAGE_READY = 2,
USC_MESSAGE_SESSION_CONNECTED = 3,
USC_MESSAGE_SET_ACTIVE_SESSION = 4,
USC_MESSAGE_SET_NEXT_SESSION = 5,
} USCMessageID;
static void
write_message (guint16 id, const guint8 *payload, guint16 payload_length)
{
gsize data_length = 4 + payload_length;
guint8 *data = g_malloc (data_length);
data[0] = id >> 8;
data[1] = id & 0xFF;
data[2] = payload_length >> 8;
data[3] = payload_length & 0xFF;
if (payload)
memcpy (data + 4, payload, payload_length);
if (write (to_dm_fd, data, data_length) < 0)
fprintf (stderr, "Failed to write to daemon: %s\n", strerror (errno));
}
static gboolean
read_message_cb (GIOChannel *channel, GIOCondition condition, gpointer data)
{
gchar header[4];
gsize n_read;
g_autoptr(GError) error = NULL;
if (g_io_channel_read_chars (channel, header, 4, &n_read, &error) != G_IO_STATUS_NORMAL)
{
g_printerr ("Failed to read header: %s\n", error->message);
return FALSE;
}
if (n_read != 4)
{
g_printerr ("Short read for header, %zi instead of expected 4\n", n_read);
return FALSE;
}
guint16 id = header[0] << 8 | header[1];
guint16 payload_length = header[2] << 8 | header[3];
gchar *payload = g_malloc0 (payload_length + 1);
if (g_io_channel_read_chars (channel, payload, payload_length, &n_read, &error) != G_IO_STATUS_NORMAL)
{
g_printerr ("Failed to read payload: %s\n", error->message);
return FALSE;
}
if (n_read != payload_length)
{
g_printerr ("Short read for payload, %zi instead of expected %d\n", n_read, payload_length);
return FALSE;
}
switch (id)
{
case USC_MESSAGE_PING:
status_notify ("UNITY-SYSTEM-COMPOSITOR PING");
break;
case USC_MESSAGE_SET_ACTIVE_SESSION:
status_notify ("UNITY-SYSTEM-COMPOSITOR SET-ACTIVE-SESSION ID=%s", (gchar *)payload);
break;
case USC_MESSAGE_SET_NEXT_SESSION:
status_notify ("UNITY-SYSTEM-COMPOSITOR SET-NEXT-SESSION ID=%s", (gchar *)payload);
break;
default:
g_printerr ("Ignoring message %d with %d octets\n", id, payload_length);
break;
}
free (payload);
return TRUE;
}
static void
request_cb (const gchar *name, GHashTable *params)
{
if (!name)
{
g_main_loop_quit (loop);
return;
}
if (strcmp (name, "PING") == 0)
write_message (USC_MESSAGE_PING, NULL, 0);
else if (strcmp (name, "PONG") == 0)
write_message (USC_MESSAGE_PONG, NULL, 0);
else if (strcmp (name, "READY") == 0)
write_message (USC_MESSAGE_READY, NULL, 0);
else if (strcmp (name, "CRASH") == 0)
kill (getpid (), SIGSEGV);
}
int
main (int argc, char **argv)
{
#if !defined(GLIB_VERSION_2_36)
g_type_init ();
#endif
loop = g_main_loop_new (NULL, FALSE);
g_unix_signal_add (SIGINT, sigint_cb, NULL);
g_unix_signal_add (SIGTERM, sigterm_cb, NULL);
status_connect (request_cb, "UNITY-SYSTEM-COMPOSITOR");
gboolean test = FALSE, container = FALSE;
int vt_number = -1;
const gchar *file = NULL;
for (int i = 1; i < argc; i++)
{
char *arg = argv[i];
if (strcmp (arg, "--from-dm-fd") == 0)
{
from_dm_fd = atoi (argv[i+1]);
i++;
}
else if (strcmp (arg, "--to-dm-fd") == 0)
{
to_dm_fd = atoi (argv[i+1]);
i++;
}
else if (strcmp (arg, "--vt") == 0)
{
vt_number = atoi (argv[i+1]);
i++;
}
else if (strcmp (arg, "--file") == 0)
{
file = argv[i+1];
i++;
}
else if (strcmp (arg, "--test") == 0)
test = TRUE;
else if (strcmp (arg, "--container") == 0)
container = TRUE;
else
return EXIT_FAILURE;
}
g_io_add_watch (g_io_channel_unix_new (from_dm_fd), G_IO_IN, read_message_cb, NULL);
g_autoptr(GString) status_text = g_string_new ("UNITY-SYSTEM-COMPOSITOR START");
if (file)
g_string_append_printf (status_text, " FILE=%s", file);
if (vt_number >= 0)
g_string_append_printf (status_text, " VT=%d", vt_number);
if (g_getenv ("XDG_VTNR"))
g_string_append_printf (status_text, " XDG_VTNR=%s", g_getenv ("XDG_VTNR"));
if (test)
g_string_append (status_text, " TEST=TRUE");
if (container)
g_string_append (status_text, " CONTAINER=TRUE");
status_notify ("%s", status_text->str);
config = g_key_file_new ();
g_key_file_load_from_file (config, g_build_filename (g_getenv ("LIGHTDM_TEST_ROOT"), "script", NULL), G_KEY_FILE_NONE, NULL);
if (g_key_file_has_key (config, "unity-system-compositor-config", "return-value", NULL))
{
int return_value = g_key_file_get_integer (config, "unity-system-compositor-config", "return-value", NULL);
status_notify ("UNITY-SYSTEM-COMPOSITOR EXIT CODE=%d", return_value);
return return_value;
}
g_main_loop_run (loop);
return exit_status;
}
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