Re: Issues with cdrsin and USB devices on RHEL5

[Bill Davidsen <davidsen@tmr.com>]

Greg Wooledge wrote:
> On Mon, Jul 14, 2008 at 10:45:25PM +0200, Giulio Orsero wrote:
>   
> > ============ /lib/udev/check-cdrom.sh
> > #!/bin/bash
> >     
> ...
>   
> >         pos=$[$pos+1]
> >     
>
> Dear gods.  Didn't anyone tell them that $[ is deprecated?
>
> pos=$(($pos+1))
>
> ... is the preferred syntax, and is POSIX/ksh compatible.
>
>   
Who cares? The $(( notation is slower to type, easier to get wrong, 
gives confusing error messages if you miss the "$" and start with 
parens, etc.  I know about it, but I would never use it, and it's 
visually easier to read correctly.

If you need max portability and/or readability you use "let pos=pos+1" 
anyway.

This is a cd burning list, not the alt.shell.pedantic newsgroup. Let's 
keep to the main topic.

--
Bill Davidsen <davidsen@tmr.com>
 "Woe unto the statesman who makes war without a reason that will still
 be valid when the war is over..." Otto von Bismark