Date: Mon, 8 Sep 2008 15:47:20 +0200 (CEST) From: Oliver Fromme <olli@lurza.secnetix.de> To: freebsd-hackers@FreeBSD.ORG, koitsu@FreeBSD.ORG Subject: Re: Extending find(1) to support -printf Message-ID: <200809081347.m88DlK8T074926@lurza.secnetix.de> In-Reply-To: <20080905143915.GA60002@icarus.home.lan>
next in thread | previous in thread | raw e-mail | index | archive | help
Jeremy Chadwick wrote: > On Fri, Sep 05, 2008 at 03:12:53AM -0700, Jeremy Chadwick wrote: > > Also, some folks on #bsdports asked why I was bothering with this in the > > first place: mutt supports backticks to run shell commands inside of > > a muttrc file. See "Building a list of mailboxes on the fly" below: > > > > http://wiki.mutt.org/?ConfigTricks > > > > Note the find ... -printf '%h ' method. I can accomplish (just > > about) the same using `echo $HOME/Maildir/*`, but if I want to > > exclude an entry, I can't use | grep -v, because mutt doesn't support > > pipes within backticks. :-) > > Follow-up: > > mutt's backtick support does in fact respect pipes. My echo|grep -v was > doing exactly what I requested: the grep -v was removing all output of > the echo, since echo returned the results in a space-delimited format, > not one per line. Hence, "mailboxes" was being executed without any > arguments. > > Equally as frustrating, mutt's backtick support will only honour the > first line of input. If a backticked command returns multiple lines, > only the first is read; the rest are ignored. Well, you can convert back and forth between spaces and newlines with tr(1): echo * | tr ' ' '\n' | grep -v whatever | tr '\n' ' ' It's not pretty, but it should work. Note that ls(1) prints one file name per line, so you can simplify the above line like this: ls | grep -v whatever | tr '\n' ' ' By the way, I often use zsh in such cases. It supports "extended globbing", for example, the wildcard expression *~*.(gz|bz2) matches all files _except_ the ones that end with .gz or .bz2. Best regards Oliver -- Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M. Handelsregister: Registergericht Muenchen, HRA 74606, Geschäftsfuehrung: secnetix Verwaltungsgesellsch. mbH, Handelsregister: Registergericht Mün- chen, HRB 125758, Geschäftsführer: Maik Bachmann, Olaf Erb, Ralf Gebhart FreeBSD-Dienstleistungen, -Produkte und mehr: http://www.secnetix.de/bsd Perl is worse than Python because people wanted it worse. -- Larry Wall
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200809081347.m88DlK8T074926>