From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 10770 invoked from network); 16 Apr 2002 13:41:10 -0000 Received: from sunsite.dk (130.225.247.90) by ns1.primenet.com.au with SMTP; 16 Apr 2002 13:41:10 -0000 Received: (qmail 14797 invoked by alias); 16 Apr 2002 13:40:47 -0000 Mailing-List: contact zsh-users-help@sunsite.dk; run by ezmlm Precedence: bulk X-No-Archive: yes X-Seq: 4840 Received: (qmail 14777 invoked from network); 16 Apr 2002 13:40:43 -0000 To: zsh-users@sunsite.dk (Zsh users list) Subject: Re: listing all executables by prefix - solution! In-reply-to: "Dan Kenigsberg"'s message of "Tue, 16 Apr 2002 15:03:04 +0300." <200204161203.PAA16978@csd.cs.technion.ac.il> Date: Tue, 16 Apr 2002 14:40:13 +0100 Message-ID: <9003.1018964413@csr.com> From: Peter Stephenson Dan Kenigsberg wrote: > and something like: > > function _lap { tmp="${(@f)$(whence -pm $1\*)}"; [[ ! -z $tmp ]] && > ls -l ${=tmp} } > > will produce fewer processes on the way. Except... see below. > P.S. I wouldn't know why > > function _lap { tmp=$(whence -pm $1\*); [[ ! -z $tmp ]] && ls -l ${=tmp} } > > is not as good, but I'm such a shameless newbie, so it is not that surprising > . It's not obvious at first sight. The problem here (and above) is with spaces. Both ${=...} and normal $(...) split words on spaces. So if you have directories with names like `Program Files' the filename will be split at that point. The "${(@f)...}" stuff makes sure you get the `whence output', including newlines, verbatim and then splits on the newlines. Of course, if you have newlines in your filenames your are totally screwed, but at least the GUI-masqeurading-as-an-OS I alluded to before isn't in the habit of using them. Hence your solution is better written using an array: function _lap { local tmp tmp=("${(@f)$(whence -pm $1\*)}") (( $#tmp )) && ls -l $tmp } -- Peter Stephenson Software Engineer CSR Ltd., Science Park, Milton Road, Cambridge, CB4 0WH, UK Tel: +44 (0)1223 392070 ********************************************************************** The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from any computer. **********************************************************************