[Qt-interest] how to trace the Unix signal?

[Jochen Roemmler]

> I run my UI application,reboot the system.after the system turn on,there
> is no any output.

I think your question is not related to Qt.

Anyway:
Maybe a reboot is sending a different signal to your application
(SIGKILL?). Please note that most (of not all) unix systems don't allow
you to catch all signals;
IIRC, SIGKILL (e.g. sent by 'kill -9') is one of them.

Please have a look at the man pages of 'sigaction' and 'signal'.

Jochen