sigtrap

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);

Signal Handler Options

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.

Signal List Options

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.

Other Options

• any
• Installs handlers only for subsequently listed signals that aren't already taken care of.
• 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.