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Date:      Wed, 1 Jul 2009 01:45:53 +0400
From:      Stanislav Sedov <stas@FreeBSD.org>
To:        Martin Blapp <mbr@FreeBSD.org>
Cc:        svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, Marc Balmer <marc@msys.ch>
Subject:   Re: svn commit: r195200 - in head/usr.sbin: . wake
Message-ID:  <20090701014553.32117b64.stas@FreeBSD.org>
In-Reply-To: <200906301851.n5UIpNJQ089171@svn.freebsd.org>
References:  <200906301851.n5UIpNJQ089171@svn.freebsd.org>

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On Tue, 30 Jun 2009 18:51:23 +0000 (UTC)
Martin Blapp <mbr@FreeBSD.org> mentioned:

> Author: mbr
> Date: Tue Jun 30 18:51:22 2009
> New Revision: 195200
> URL: http://svn.freebsd.org/changeset/base/195200
>=20
> Log:
>   Add wake, a tool to send Wake on LAN frames to hosts on a local Etherne=
t network
>  =20

Cool! I always wanted something like this in base.

> +
> +WARNS?=3D 2
> +
> +.include <bsd.prog.mk>
>

What is the reason to use WARNS=3D2 here?  Does it compile with higher warn=
ing
flags set?  Could this warnings be fixed?
=20

> +	p =3D (u_char *)&pkt;
> +	len =3D sizeof(pkt);
> +	bw =3D 0;
> +	while (len) {
> +		if ((bw =3D write(bpf, &pkt, sizeof(pkt))) =3D=3D -1)
> +			return -1;
> +		len -=3D bw;
> +		p +=3D bw;
> +	}
> +	return 0;
> +}

What the "p" pointer is used here for?  I don't see any usage for it besides
incrementing it in the loop.  Am I missing something?

Thanks!
--=20
Stanislav Sedov
ST4096-RIPE

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