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Subject: Re: Calling cygpath from find exec?
To: cygwin AT cygwin DOT com
References: <56537B03 DOT 4050204 AT codespunk DOT com>
From: Eric Blake <eblake AT redhat DOT com>
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Message-ID: <565383D5.3010709@redhat.com>
Date: Mon, 23 Nov 2015 14:23:33 -0700
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On 11/23/2015 01:45 PM, Matt D. wrote:
> Is there a reason why these produce different results?
>=20
> find . -exec cygpath -wa {} \;
> find . -exec echo $(cygpath -wa {}) \;

Incorrect quoting.  You are invoking:

find . -exec echo c:\cygwin\home\you\{} \;

(or whatever ./{} resolves to), instead of one cygpath per name found by
find.

>=20
> I have to do this which is much slower:
> find . -exec bash -c 'echo $(cygpath -wa {})' \;
>=20

This indeed quotes things so that cygpath is now invoked once per file,
but at the expense of an additional bash per file as well.

Why not just:

find . -exec cygpath -wa {} +

since cygpath handles more than one file in an invocation (that is,
using '-exec {} +' rather than '-exec {} \;' is generally faster).

--=20
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org


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