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Date: Fri, 8 Mar 2013 13:09:17 -0600
From: Brooks Davis <brooks@freebsd.org>
To: Lars Engels <lars.engels@0x20.net>
Subject: Re: Argument list too long
Message-ID: <20130308190917.GA34838@lor.one-eyed-alien.net>
References: <82112.1362671436.13776555968178880512@ffe17.ukr.net>
 <20130307161546.GV47829@e-new.0x20.net>
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On Thu, Mar 07, 2013 at 05:15:46PM +0100, Lars Engels wrote:
> On Thu, Mar 07, 2013 at 05:50:36PM +0200, Vladislav Prodan wrote:
> > Why 12K small files from one directory to cause problems?
> >=20
> > # ll | wc -l
> >    11467
> >=20
> > # grep X-PHP-Script * | more
> > /sbin/grep: Argument list too long.
> >=20
> > # egrep X-PHP-Script *.ua | more
> > /usr/sbin/egrep: Argument list too long.
> >=20
> > # cat *.ua | grep X-PHP-Script | more
> > /sbin/cat: Argument list too long.
> >=20
> >=20
> >=20
>=20
> Your shell can't process that many arguments. Use this:
>=20
> grep -R "X-PHP-Script" .
>=20
> or if you don't want to descent into subdirectories:
>=20
> find . -type -f -name '*.ua' -maxdepth 1 -exec grep "X-PHP-Script" {} \+

This won't include file names and is gratuitously inefficient starting one
grep per file.  The command you're looking for is:

find . -type -f -name '*.ua' -maxdepth 1 -print0 | xargs -0 grep -H "X-PHP-=
Script"

The find -print0 | xargs -0 allows filenames to contain spaces.  The
grep -H is mostly theoretical in that the last grep invocation by xargs
couple only include one file and thus wouldn't include the filename.

-- Brooks

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