Subject: Re: Re: [shell-discuss] shellstyle
--------
> David Korn wrote:
> >
> > Subject: Re: [shell-discuss] shellstyle
> > --------
> >
>
> > Always use '{'+'}' when using variable names longer than one character.
> > I would allow the {} to be omitted for simple named variables
> > that are followed by a blank, /, ;, or $.
>
> Mhhh... I am not sure whether it's a good idea to add too many
> exceptions...
I think that $dir/$file is easier to read than ${dir}/${file} and
certainly harder to write.
>
> > Always put variables into quotes when handling filenames or user input.
> > There is no need for quotes with assignment, redirection words or
> > inside [[...]]. They can also be omitted if IFS='' and set -o
> > noglob.
The quoting is not needed for
assignments
redirections
inside [[....]]
inside ((...))
case ...
since in all these cases neither word splitting or file name generation
is performed. However, not that for [[ name == pattern ]] quoting
pattern causes it to be treated as a literal string.
>
> I've added a note for this:
> -- snip --
> <note><para>
> As alternative a script may set <literal>IFS='' ; set -o
> noglob</literal> to turn off the
> interpretation of any field seperators and the pattern globbing.
> </para></note>
> -- snip --
>
> ----
>
> Bye,
> Roland
>
David Korn
dgk at research.att.com
