Date: Wed, 18 Nov 1998 11:49:18 -0800 (PST) From: David Wolfskill <dhw@whistle.com> To: freebsd-questions@FreeBSD.ORG, gmann@itw.com Subject: Re: sh programming question Message-ID: <199811181949.LAA05789@pau-amma.whistle.com> In-Reply-To: <36531668.2C2CD440@itw.com>
next in thread | previous in thread | raw e-mail | index | archive | help
>Date: Wed, 18 Nov 1998 13:48:08 -0500 >From: Glen Mann <gmann@itw.com> >In a Bourne shell script, I want to compare two lists, obtained e.g. >with > list1=`ls $dirname1` > list2=`ls $dirname2` >in order to determine what elements are in list1 and list2, or in one >but not the other. The two lists will always be sorted, but not >necessarily directory listings. I'd like to do this without using >temporary files. I could use arrays in a Bash script and step through >the lists, but want to stick with sh. Is there an easy way to do this, >perhaps using sort and uniq? If the lists are already sorted, I doubt that sort will be a whole lot of use. However, you may find "diff" and its relatives handy. david -- David Wolfskill UNIX System Administrator dhw@whistle.com voice: (650) 577-7158 pager: (650) 371-4621 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199811181949.LAA05789>