Scieneer Common Lisp 1.3.9 online documentation

Unix signals

sys:enable-interrupt signal handler[Function]

Enable a signal handler. The signal should be a valid signal number or a keyword of the standard UNIX signal name. Note that the signal :sigpwr is used by the lisp implementation and is not available. The handler may be either:

:default
Restore the default behaviour for the signal.
:ignore
Attempt to ignore the signal.
A function
The function to be called to handle the signal. For synchronous signals, the handler is called within the thread causing the signal, and is called with three arguments: the signal number, a SAP pointing to the siginfo structure, and a SAP pointing to the signal context. For asynchronous signals the handler is called from a new thread dedicated to handling the signal, and is passed just one argument, the signal number.

sys:default-interrupt signal[Function]

Restore the default behavior for the Unix signal.

sys:ignore-interrupt signal[Function]

Attempt to ignore the Unix signal.

unix:unix-signal-name signal[Function]

Return the name of the signal as a string. The signal should be a valid signal number or a keyword of the standard UNIX signal name.

unix:unix-signal-number signal[Function]

Return the number of the given signal. The signal should be a valid signal number or a keyword of the standard UNIX signal name.

unix:unix-signal-synchronization signal[Function]

Return the synchronization of the given signal. The signal should be a valid signal number or a keyword of the standard UNIX signal name. The synchronization which will be either:

:sync
A synchronous signal, such as a floating pointer exception, generated by a thread and delivered to the thread generating the signal.
:async
An asynchronous signal delivered to the process. A new thread will be created to handle each asynchronous signal received.

unix:unix-signal-description signal[Function]

Return a string describing signal. The signal should be a valid signal number or a keyword of the standard UNIX signal name.

unix:unix-kill pid signal[Function]

Send the signal to the process with process ID pid. The signal should be a valid signal number or a keyword of the standard UNIX signal name. Return t upon success, otherwise nil and an error number.

unix:unix-killpg pgrp signal[Function]

Send the signal to the all the processes in process group pgrp. The signal should be a valid signal number or a keyword of the standard UNIX signal name. Return t upon success, otherwise nil and an error number.