Pragma to enable simple signal handling. Provides two signal handlers that can be installed, or you can install your own handler; also provides options to specify which signals to trap. Ignores requests to trap signals not used in your system's architecture.
use sigtrap; # Initialize default signal handlers use sigtrap qw(die normal-signals); use sigtrap 'handler' => \handlername, 'normal-signals'; use sigtrap qw(handler handlername normal-signals stack-trace error-signals);
Used to specify which handler will be installed for signals installed after the handler:
die Installs handler that die s with a message indicating the signal that was trapped.
handler handlername Installs your handler handlername.
stack-trace Default signal handler. Outputs stack trace to STDERR and tries to dump core.
You can specify your own list of options:
use sigtrap qw(BUS SEGV PIPE ABRT);
or use one of the following built-in option lists:
error-signals Signals that indicate a serious problem: ABRT, BUS, EMT, FPE, ILL, QUIT, SEGV, SYS, and TRAP.
normal-signals Signals a program is most likely to encounter: HUP, INT, PIPE, and TERM.
old-interface-signals Default. Signals trapped by default in older versions of sigtrap: ABRT, BUS, EMT, FPE, ILL, PIPE, QUIT, SEGV, SYS, TERM, and TRAP.
number Requires that the version of sigtrap being used must be at least number.
signal Installs a handler for any argument that looks like a signal name.
untrapped Installs handlers only for subsequently listed signals not already trapped or ignored.
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