Re: substituting for dirname

dattier(_at_)wwa(_dot_)com (David W. Tamkin) writes:
> Timothy Luoma had an answer for Chris Mason, which included this:
>
> |      DIR=`dirname ${MBOX}`
>
> Procmail can do that without forking dirname.
>
> :0
> * MBOX ?? ^^\/.+/
> {
>  DIR=$MAILDIR/$MATCH
>
>  :0ic
>  * ? test ! -d "$DIR"
>  | mkdir -p "$DIR"
> }

Beware: there apparently are OSes on which a trailing slash will cause
mkdir to fail -- they interpret a missing path component as ".", and
"mkdir foo/." doesn't work.  If you're so lucky as to have to work on
such an OS, you'll need to add another condition line to the above
recipe in order to zap the trailing slash:

        :0
        * MBOX  ?? ^^\/.+/
        * MATCH ?? ^^\/.*[^/]
        {
            DIR=$MAILDIR/$MATCH
        
            :0ic
            * ? test ! -d "$DIR"
            | mkdir -p "$DIR"
        }


Philip Guenther