how to implement event handling in shell script?

Question

In my shell script, im deleting a file at the end of script. And i need it to be deleted even if the script was stopped by (ctrl c or ctrl z)..Is there any way to read that and delete the file?

Thanks in advance

fge · Accepted Answer · 2011-12-16 09:00:06Z

3

Like @pgl said, trap is what you want. The syntax is:

trap <actionhere> <event> [event...]

The action is one and only one argument, but it can run several commands. The event is either exit (when you call exit manually) or a signal by its "short" name, ie without the SIG prefix (for instance, INT for SIGINT.

Example:

trap "rm -f myfile" INT exit

You can change the trap all along the script. And of course, you can use variable interpolation in your action.

answered Dec 16, 2011 at 9:00

fge

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creator Over a year ago

I want to know more about shell's event programming syntax, example codes.

pgl · Accepted Answer · 2011-12-16 08:43:35Z

2

You can catch ctrl+c's with the trap builtin. Try this to get started:

help trap

answered Dec 16, 2011 at 8:43

pgl

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