Z:gnu-bash--51d88d-Trap signals and other events./en

Trap signals and other events. Defines and activates handlers to be run when the shell receives signals or other conditions. ARG is a command to be read and executed when the shell receives the signal(s) SIGNAL_SPEC. If ARG is absent (and a single SIGNAL_SPEC   is supplied) or `-', each specified signal is reset to its original value. If ARG is the null string each SIGNAL_SPEC is ignored by the shell and by the commands it invokes. If a SIGNAL_SPEC is EXIT (0) ARG is executed on exit from the shell. If   a SIGNAL_SPEC is DEBUG, ARG is executed before every simple command. If   a SIGNAL_SPEC is RETURN, ARG is executed each time a shell function or a    script run by the. or source builtins finishes executing. A SIGNAL_SPEC of ERR means to execute ARG each time a command's failure would cause the shell to exit when the -e option is enabled. If no arguments are supplied, trap prints the list of commands associated with each signal. Options: -l	print a list of signal names and their corresponding numbers -p	display the trap commands associated with each SIGNAL_SPEC Each SIGNAL_SPEC is either a signal name in  or a signal number. Signal names are case insensitive and the SIG prefix is optional. A   signal may be sent to the shell with "kill -signal $$". Exit Status: Returns success unless a SIGSPEC is invalid or an invalid option is given.