Date: Sat, 07 Mar 2009 13:28:57 +0100 From: Pierre Guinoiseau <geekounet@poildetroll.net> To: Matthew Seaman <m.seaman@infracaninophile.co.uk> Cc: Kurt Buff <kurt.buff@gmail.com>, "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org>, "Vasadi I. Claudiu Florin" <claudiu.vasadi@gmail.com> Subject: Re: the "yes" comand Message-ID: <49B26889.2010006@poildetroll.net> In-Reply-To: <49AF7CEB.90901@infracaninophile.co.uk> References: <op.uqak1hn5flcvyi@da1-desktop-x64> <4ad871310903041609n1542132es793320cb9e0a28e2@mail.gmail.com> <op.uqak9wxuflcvyi@da1-desktop-x64> <a9f4a3860903041615g40627c32t8d965df823b85918@mail.gmail.com> <49AF7CEB.90901@infracaninophile.co.uk>
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Matthew Seaman wrote:
> Kurt Buff wrote:
>> On Wed, Mar 4, 2009 at 16:06, Vasadi I. Claudiu Florin
>> <claudiu.vasadi@gmail.com> wrote:
>>> Well , I noticed that, but it's a bit odd now isn't it. I mean,
>>> what's the
>>> sense of having some darn letter printer out forever ? I found it
>>> kind of
>>> silly If you ask me.
>>
>> But, incredibly useful if you actually write shell scripts - many
>> programs want a 'y' for input from the stdin, and this will do that
>> for you.
>=20
> Here's an example. When upgrading FreeBSD, especially over a large del=
ta
> in version numbers, you will frequently need to delete old files etc. t=
hat
> are no longer part of the base system. You are provided with a mechani=
sm
> to do that, viz:
>=20
> # cd /usr/src
> # make check-old {prints out all old files, directories and
> libraries to be deleted}
> # make delete-old
> {prompts you to delete anything apart from shlibs which it won't
> touch}
>=20
> However 'make delete-old' will ask you whether you want to delete each
> and every individual file, which is tedious. If you decide from your
> inspection of the 'make check-old' output that you don't want any of th=
e
> old files, you can just run:
>=20
> # yes | make delete-old
>=20
> Job done.
>=20
> Cheers,
>=20
> Matthew
>=20
Or you can also do:
# make BATCH_DELETE_OLD_FILES=3DYES delete-old
;)
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