[Sugar-devel] Quoting in shell scripts (was: Re: [sugar-devel] Recent fiddlings with Print Support)

Jonas Smedegaard dr at jones.dk
Sun May 17 11:10:13 EDT 2009

Hash: RIPEMD160

On Sat, May 16, 2009 at 06:20:56PM +0530, Vamsi Krishna Davuluri wrote:
>Hello! I finally figured what was going wrong with my script.
>Jonas, I have tried implementing your suggestions. using mktemp, XXXXX, 
>and also a -m 077. The code doesnt work for some reason that way. lpr 
>gets me a failed job.

Try piece by piece to locate which part does not work in your 

Or try invoking the script with "bash -x" to enable debugging.

>[Vamsi at localhost Desktop]$ $(set -e abiword [...]

I believe the synax is this:

[Vamsi at localhost Desktop]$ $(set -e; abiword [...]

And if I didn't mention it clearly enough before, I try do it now: I 
strongly recommends to completely avoid subshells (those `` and $() and 
() constructs) as they are more complex to do right!

>The lp user of lp group ( cups script executor) messes up with 
>permissions when executing commands in a subshell, that's really messed 
>up. my rationale is, in a subshell the lp user has no longer domain. 
>Also, CUPS doesnt write to our /tmp folder, instead has its own folder 
>defined somewhere.

No surprise.  Please read above.  Read twice if needed ;-)

  - Jonas

- -- 
* Jonas Smedegaard - idealist og Internet-arkitekt
* Tlf.: +45 40843136  Website: http://dr.jones.dk/

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