/**
* Perform the server's mission
*
* @return Non-zero on error
*/
int
master_loop(void)
{
int rc = 1, r;
while (!reexecing && !terminating) {
if (danger) {
danger = 0;
free(send_buffer);
send_buffer = NULL;
send_buffer_size = 0;
colour_list_pack(&colours);
free(colour_list_buffer_without_values);
colour_list_buffer_without_values = NULL;
free(colour_list_buffer_with_values);
colour_list_buffer_with_values = NULL;
}
if (!(r = mds_message_read(&received, socket_fd)))
if (!(r = handle_message()))
continue;
if (r == -2) {
eprint("corrupt message received, aborting.");
goto done;
} else if (errno == EINTR) {
continue;
} else {
fail_if (errno != ECONNRESET);
}
eprint("lost connection to server.");
mds_message_destroy(&received);
mds_message_initialise(&received);
connected = 0;
fail_if (reconnect_to_display());
connected = 1;
}
rc = 0;
goto done;
fail:
xperror(*argv);
done:
if (rc || !reexecing) {
mds_message_destroy(&received);
colour_list_destroy(&colours);
}
free(send_buffer);
free(colour_list_buffer_without_values);
free(colour_list_buffer_with_values);
return rc;
}
/**
* Perform the server's mission
*
* @return Non-zero on error
*/
int master_loop(void)
{
int rc = 1, r;
while (!reexecing && !terminating)
{
if (switching_vt)
{
int leaving = switching_vt == 1;
switching_vt = 0;
r = switch_vt(leaving);
}
else
if (r = mds_message_read(&received, socket_fd), r == 0)
r = handle_message();
if (r == 0)
continue;
if (r == -2)
{
eprint("corrupt message received, aborting.");
goto done;
}
else if (errno == EINTR)
continue;
else
fail_if (errno != ECONNRESET);
eprint("lost primary connection to server.");
mds_message_destroy(&received);
mds_message_initialise(&received);
connected = 0;
fail_if (reconnect_to_display());
connected = 1;
}
rc = 0;
if (vt_set_exclusive(display_tty_fd, 0) < 0) xperror(*argv);
if (vt_set_graphical(display_tty_fd, 0) < 0) xperror(*argv);
if (unlink(vtfile_path) < 0)
xperror(*argv);
vt_close(display_tty_fd, &old_vt_stat);
goto done;
fail:
xperror(*argv);
done:
rc |= secondary_thread_failed;
if (rc || !reexecing)
mds_message_destroy(&received);
if ((errno = pthread_join(secondary_thread, NULL)))
xperror(*argv);
return rc;
}
/**
* Wait for confirmation that we may switch virtual terminal
*
* @param data Thread input parameter, will always be `NULL`
* @return Thread return value, will always be `NULL`
*/
void* secondary_loop(void* data)
{
mds_message_t secondary_received;
int r;
(void) data;
secondary_thread_started = 1;
fail_if (mds_message_initialise(&secondary_received) < 0);
while (!reexecing && !terminating)
{
if (r = mds_message_read(&secondary_received, secondary_socket_fd), r == 0)
r = vt_accept_switch(display_tty_fd);
if (r == 0)
continue;
if (r == -2)
{
eprint("corrupt message received, aborting.");
secondary_thread_failed = 1;
goto done;
}
else if (errno == EINTR)
continue;
else
fail_if (errno != ECONNRESET);
eprint("lost secondary connection to server.");
mds_message_destroy(&secondary_received);
mds_message_initialise(&secondary_received);
fail_if (reconnect_fd_to_display(&secondary_socket_fd) < 0);
}
goto done;
fail:
xperror(*argv);
secondary_thread_failed = 1;
done:
secondary_thread_started = 0;
mds_message_destroy(&secondary_received);
if (!reexecing && !terminating)
pthread_kill(master_thread, SIGTERM);
return NULL;
}
/**
* Perform the server's mission
*
* @return Non-zero on error
*/
int
master_loop(void)
{
int rc = 1, r;
while (!reexecing && !terminating) {
if (!(r = mds_message_read(&received, socket_fd)))
if (!(r = echo_message()))
continue;
if (r == -2) {
eprint("corrupt message received, aborting.");
goto done;
} else if (errno == EINTR) {
continue;
} else {
fail_if (errno != ECONNRESET);
}
eprint("lost connection to server.");
mds_message_destroy(&received);
mds_message_initialise(&received);
connected = 0;
fail_if (reconnect_to_display());
connected = 1;
}
rc = 0;
goto done;
fail:
xperror(*argv);
done:
if (rc || !reexecing)
mds_message_destroy(&received);
free(echo_buffer);
return rc;
}