Unthreaded applications

Each MQI function sets up its own signal handler for the signals. Users' handlers for these are replaced for the duration of the MQI function call. Other signals can be caught in the normal way by user-written handlers.

Each MQI function sets up its own signal handler for the signals:

• SIGALRM
• SIGBUS
• SIGFPE
• SIGSEGV
• SIGILL

Users' handlers for these are replaced for the duration of the MQI function call. Other signals can be caught in the normal way by user-written handlers. If we do not install a handler, the default actions (for example, ignore, core dump, or exit) are left in place.

After IBM MQ handles a synchronous signal (SIGSEGV, SIGBUS, SIGFPE, SIGILL), it attempts to pass the signal to any registered signal handler before making the MQI function call.

Parent topic: UNIX and Linux signal handling