/**
* Forks and runs the given application, waits for a maximum of timeout seconds for process to finish.
*
* @param argv The arguments values, the first one is the application path or name
*/
void bb_run_fork_wait(char** argv, int timeout) {
check_handler();
// Fork and attempt to run given application
pid_t ret = fork();
if (ret == 0) {
// Fork went ok, child process replace
bb_run_exec(argv);
} else {
if (ret > 0) {
// Fork went ok, parent process continues
bb_log(LOG_DEBUG, "Process %s started, PID %i.\n", argv[0], ret);
pidlist_add(ret);
//sleep until process finishes or timeout reached
int i = 0;
while (bb_is_running(ret) && ((i < timeout) || (timeout == 0)) && dowait) {
usleep(1000000);
i++;
}
//make a single attempt to kill the process if timed out, without waiting
if (bb_is_running(ret)) {
bb_stop(ret);
}
} else {
// Fork failed
bb_log(LOG_ERR, "Process %s could not be started. fork() failed.\n", argv[0]);
return;
}
}
return;
}
uint8_t bb_i2c_read( uint8_t addr, uint8_t *buf, uint8_t len )
{
uint8_t rc = 0;
bb_start();
bb_out( addr | 0x01 ); // address + R
if ( get_ack() )
{
while ( len > 0 )
{
*buf++ = bb_in();
len--;
if ( len > 0 )
{
send_ack();
}
else
{
send_nak();
}
}
}
else
{
rc = 1;
}
bb_stop();
return rc;
}
uint8_t bb_i2c_write( uint8_t addr, uint8_t *buf, uint8_t len )
{
uint8_t rc = 0;
bb_start();
bb_out( addr ); // address + W
if ( get_ack() )
{
while ( len > 0 )
{
bb_out( *buf++ );
if ( get_ack() == 0 )
{
rc = 1;
break;
}
len--;
}
}
else
{
rc = 1;
}
bb_stop();
return rc;
}
/**
* Start the X server by fork-exec, turn card on and load driver if needed.
* If after this method finishes X is running, it was successfull.
* If it somehow fails, X should not be running after this method finishes.
*/
void start_secondary(void) {
char driver[BUFFER_SIZE] = {0};
/* enable card if the switcher is available */
if (switcher) {
if (switch_on() != SWITCH_ON) {
set_bb_error("Could not enable discrete graphics card");
return;
}
if (pci_config_restore(pci_bus_id_discrete, &pci_config_state_discrete)) {
bb_log(LOG_WARNING, "Could not restore PCI configuration space: %s\n",
strerror(errno));
}
}
//if runmode is BB_RUN_EXIT, do not start X, we are shutting down.
if (bb_status.runmode == BB_RUN_EXIT) {
return;
}
if (pci_get_driver(driver, pci_bus_id_discrete, sizeof driver)) {
/* if the loaded driver does not equal the driver from config, unload it */
if (strcasecmp(bb_config.driver, driver)) {
if (!module_unload(driver)) {
/* driver failed to unload, aborting */
return;
}
}
}
/* load the driver if none was loaded or if the loaded driver did not match
* the configured one */
if (strcasecmp(bb_config.driver, driver)) {
char *module_name = bb_config.module_name;
char *driver_name = bb_config.driver;
if (!module_load(module_name, driver_name)) {
set_bb_error("Could not load GPU driver");
return;
}
}
//no problems, start X if not started yet
if (!bb_is_running(bb_status.x_pid)) {
char pci_id[12];
static char *x_conf_file;
snprintf(pci_id, 12, "PCI:%02x:%02x:%o", pci_bus_id_discrete->bus,
pci_bus_id_discrete->slot, pci_bus_id_discrete->func);
if (!x_conf_file) {
x_conf_file = xorg_path_w_driver(bb_config.x_conf_file, bb_config.driver);
}
bb_log(LOG_INFO, "Starting X server on display %s.\n", bb_config.x_display);
char *x_argv[] = {
XORG_BINARY,
bb_config.x_display,
"-config", x_conf_file,
"-sharevts",
"-nolisten", "tcp",
"-noreset",
"-verbose", "3",
"-isolateDevice", pci_id,
"-modulepath",
bb_config.mod_path,
NULL
};
if (!*bb_config.mod_path) {
x_argv[12] = 0; //remove -modulepath if not set
}
//close any previous pipe, if it (still) exists
if (bb_status.x_pipe[0] != -1){close(bb_status.x_pipe[0]); bb_status.x_pipe[0] = -1;}
if (bb_status.x_pipe[1] != -1){close(bb_status.x_pipe[1]); bb_status.x_pipe[1] = -1;}
//create a new pipe
if (pipe2(bb_status.x_pipe, O_NONBLOCK)){
set_bb_error("Could not create output pipe for X");
return;
}
bb_status.x_pid = bb_run_fork_ld_redirect(x_argv, bb_config.ld_path, bb_status.x_pipe[1]);
//close the end of the pipe that is not ours
if (bb_status.x_pipe[1] != -1){close(bb_status.x_pipe[1]); bb_status.x_pipe[1] = -1;}
}
//check if X is available, for maximum 10 seconds.
time_t xtimer = time(0);
Display * xdisp = 0;
while ((time(0) - xtimer <= 10) && bb_is_running(bb_status.x_pid)) {
xdisp = XOpenDisplay(bb_config.x_display);
if (xdisp != 0) {
break;
}
check_xorg_pipe();//make sure Xorg errors come in smoothly
usleep(100000); //don't retry too fast
}
check_xorg_pipe();//make sure Xorg errors come in smoothly
//check if X is available
if (xdisp == 0) {
//X not available
/// \todo Maybe check X exit status and/or messages?
if (bb_is_running(bb_status.x_pid)) {
//X active, but not accepting connections
set_bb_error("X unresponsive after 10 seconds - aborting");
bb_stop(bb_status.x_pid);
} else {
//X terminated itself
set_bb_error("X did not start properly");
}
} else {
//X accepted the connetion - we assume it works
XCloseDisplay(xdisp); //close connection to X again
bb_log(LOG_INFO, "X successfully started in %i seconds\n", time(0) - xtimer);
//reset errors, if any
set_bb_error(0);
}
}//start_secondary
