STW TC1, User Manual

Page: 89 / 374

7 Teleservice Application Framework
User Manual 89/374
ysysd
The system daemon's task is to

trigger the kernel watchdog (which triggers the hardware watchdog).

offer watchdog functionality to applications.

applications can register, trigger and cancel the watchdog service via D-Bus calls.

trigger, supervise and cancel the system shutdown.

start and stop the shutdown depending on the D+ pin.

delay the shutdown process according to the settings in the /tmp/sdruntime file.

send ignition event signals.
Basic configuration of the daemon could be handled in its own configuration file (ysysd.conf).
Relevant sections of the configuration file:
Section: Log file path
# The logging information can be written to a log file at the following path
# By default, the path is deactivated because the corresponding line is commented out.
# Max. path length is 255
# If the path is deactivated or no path is set, an error message will be put on stdout
Log_File /var/log/ysysd.log
Section: Ignition interface path
# The ysysd watches the ignition pin and would start the shutdown process if it is switched
off.
# Max. path length is 256
# If the path is deactivated or no path is set, an error message will be put on stdout.
dplus_path /proc/stw_shutdown/dplus