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Subject:	Re: /bin/ gets deleted on error
References:	<CAMZ6u3sxGACjd12x+_p75fX_dMDYLLj6KXOysq2T_iH6hoHNDw AT mail DOT gmail DOT com> <58EFB88A DOT 5090807 AT tlinx DOT org> <CAPF-yObM81YpnK52F7uNxKu6jaxNAL3xQiy7KZQyXSZeomxodg AT mail DOT gmail DOT com>
To:	cygwin AT cygwin DOT com
From:	Brian Inglis <Brian DOT Inglis AT SystematicSw DOT ab DOT ca>
Reply-To:	Brian DOT Inglis AT SystematicSw DOT ab DOT ca
Message-ID:	<df96eab9-367e-c139-a769-dbdd4d4b7700@SystematicSw.ab.ca>
Date:	Thu, 13 Apr 2017 12:43:29 -0600
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On 2017-04-13 12:01, Dan Kegel wrote:
>>> For the second time this week my /bin/ folder gets obliterated on an
>>> error during normal usage. It is equivalent of doing the infamous "rm
>>> -rf  /bin" .
> 
> What were you doing immediately before the directory disappeared?
> 
> I have only had things like this happen from user error,
> e.g. scripting mistakes.
> 
> (The first time I saw somebody rm -rf / was in 1980 :-) )

BTDT a few times! 
Easy to do with a typo in a script variable name e.g. 
	rm -fR $fopdir/ 
or running a script with a typo that leaves a variable undefined; 
defensive coding is your friend to avoid disasters: 
	if [ -n "$foodir" ] && [ -d $foodir/ ]; then
	  /bin/rm -fR -- $foodir || exit
	else
	  echo "Can't find directory '$foodir'"
	  exit 2
	fi

-- 
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

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