Re: Safe scripting

[Atom Smasher <atom@xxxxxxxxxxx>]

On Wed, 21 Jan 2009, Thorsten Kampe wrote:

> what is the best way to detect errors in a (zsh) script?
>
> Or to be more specific: shell scripts (in contrast to other scripting
> languages) keep on running even if an error occurs. How can I detect
> errors in a script and exit if one occurs?
====================

TRAPZERR () {
	print "something went wrong" >&2
	exit 1
}

more info in the zshmisc man page.

or...

cd foo && \
    rm bar && \
    cd foobar && \
    rm foobarbar




> Say, I have a sequence of commands that all depend on each other:
>
> cd foo
> rm bar
> cd foobar
> rm foobarbar
>
> I could query each commands return code like
> if cd foo;
>    then if rm bar;
>             then if cd foobar;
>                      then rm foobarbar; fi; fi; fi
>
> But of course that looks to weird. So what would you suggest?!
>
> Thorsten


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