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Date:      Mon, 5 Mar 2018 08:37:58 -0800
From:      Bryan Drewery <bdrewery@FreeBSD.org>
To:        Bruce Evans <brde@optusnet.com.au>, Ian Lepore <ian@freebsd.org>
Cc:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   Re: svn commit: r330436 - head/bin/chflags
Message-ID:  <a49d3beb-9780-4b3d-03e6-b9ccb77baab9@FreeBSD.org>
In-Reply-To: <20180305140228.P935@besplex.bde.org>
References:  <201803050156.w251u7Y8020941@repo.freebsd.org> <1520215860.38056.3.camel@freebsd.org> <20180305140228.P935@besplex.bde.org>

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From: Bryan Drewery <bdrewery@FreeBSD.org>
To: Bruce Evans <brde@optusnet.com.au>, Ian Lepore <ian@freebsd.org>
Cc: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Message-ID: <a49d3beb-9780-4b3d-03e6-b9ccb77baab9@FreeBSD.org>
Subject: Re: svn commit: r330436 - head/bin/chflags
References: <201803050156.w251u7Y8020941@repo.freebsd.org>
 <1520215860.38056.3.camel@freebsd.org> <20180305140228.P935@besplex.bde.org>
In-Reply-To: <20180305140228.P935@besplex.bde.org>

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On 3/4/2018 8:30 PM, Bruce Evans wrote:
> On Sun, 4 Mar 2018, Ian Lepore wrote:
>=20
>> On Mon, 2018-03-05 at 01:56 +0000, Bryan Drewery wrote:
>>>
>>> Log:
>>> \xa0 chflags: Add -x option to not traverse mount points.
>>
>> Yay! \xa0One day later than I needed it, but still, yay!
>=20
> I recently noticed that find(1) needs an option to not look at mount
> points at all, and further options to classify mount points so that
> you can prune them.
>=20
> After reading the above and investigating further, I noticed that -x
> is broken in most FreeBSD utilities, since POSIX requires not looking
> at mount points at all for the few utilities that support -x.=C2=A0 E.g=
=2E,
> for du in 2001 draft 7 POSIX:
>=20
> 12578=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 -x=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Whe=
n evaluating file sizes, evaluate only
> those files that have the same device as
> 12579=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 the file specified by the file operand.
> 12580=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 Specifying more than one of the mutually-exclusive
> options -H and -L shall not be considered

Yes I'm quite annoyed that my workaround for chflags not having -x,
using `find -x ... -exec chflags`, is still trying to modify mountpoints
but not descending into them.

>=20
> Mount points are on a different device, but FreeBSD du -x is broken by
> using FTS_XDEV and not filtering out the mount points.  Linux du -x
> (an old version in /compat/linyx/usr/bin) works correctly.


--=20
Regards,
Bryan Drewery


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