[ACCEPTED]-BASH how to execute a command on script termination?-device
Accepted answer
Yep, you can use the 'trap' command. Hitting 3 CTRL-C sends a SIGINT, so we can use trap 2 to catch that:
#!/bin/bash
trap "echo hello world" INT
sleep 10
If you hit CTRL-C when this 1 runs, it'll execute the command (echo hello world
) :-)
$ help trap
trap: trap [-lp] [arg signal_spec ...]
The command ARG is to be read and executed when the shell receives
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)
the command ARG is executed on exit from the shell. If a SIGNAL_SPEC
is DEBUG, ARG is executed after every simple command. If the`-p' option
is supplied then the trap commands associated with each SIGNAL_SPEC are
displayed. If no arguments are supplied or if only `-p' is given, trap
prints the list of commands associated with each signal. Each SIGNAL_SPEC
is either a signal name in <signal.h> or a signal number. Signal names
are case insensitive and the SIG prefix is optional. `trap -l' prints
a list of signal names and their corresponding numbers. Note that a
signal can be sent to the shell with "kill -signal $$".
0
Use a trap.
trap "do_something" SIGINT
where "do_something" is a command 1 or function name.
Source:
stackoverflow.com
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