shell-signal.md

shell-signal(3)

NAME

set_cleanup_handler, signal_handler, unset_cleanup_handler - functions to signal handling.

SYNOPSIS

• signal_handler (handler|SIG_IGN|SIG_DFL) signal [signal...]
• set_cleanup_handler handler
• unset_cleanup_handler

DESCRIPTION

signal_handler

Function sets handler code whan any of the specified signals are received. Return code of handler function will be ignored. Special handlers is SIG_IGN and SIG_DFL (See signal (2)).

Usage example:

signal_handler 'echo $arg' TERM EXIT HUP
signal_handler SIG_IGN     TERM EXIT HUP
signal_handler SIG_DFL     TERM EXIT HUP

set_cleanup_handler

Function sets exit handler. The handler function takes the exit code as an argument. Return code of handler function will be ignored.

Usage example:

exit_function() { echo "Exit with return code '$1'"; }
set_cleanup_handler exit_function

unset_cleanup_handler

Function removes exit handler. Usage example:

unset_cleanup_handler

AUTHOR

Authors and contributors of the programs included in the libshell package are listed in the COPYING file.

BUGS

Report bugs to the authors.