From owner-svn-src-head@FreeBSD.ORG Sat Oct 31 19:05:26 2009 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BE1C6106566B; Sat, 31 Oct 2009 19:05:26 +0000 (UTC) (envelope-from ed@hoeg.nl) Received: from palm.hoeg.nl (mx0.hoeg.nl [IPv6:2001:7b8:613:100::211]) by mx1.freebsd.org (Postfix) with ESMTP id 8308A8FC1B; Sat, 31 Oct 2009 19:05:26 +0000 (UTC) Received: by palm.hoeg.nl (Postfix, from userid 1000) id AF7E21CC4D; Sat, 31 Oct 2009 20:05:25 +0100 (CET) Date: Sat, 31 Oct 2009 20:05:25 +0100 From: Ed Schouten To: Christian Brueffer Message-ID: <20091031190525.GF1293@hoeg.nl> References: <200910311222.n9VCMOGk089115@svn.freebsd.org> <20091031185443.GE1293@hoeg.nl> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="YfqBrEkRVu0wMIYz" Content-Disposition: inline In-Reply-To: <20091031185443.GE1293@hoeg.nl> User-Agent: Mutt/1.5.20 (2009-06-14) Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r198714 - head/sbin/mknod X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 31 Oct 2009 19:05:26 -0000 --YfqBrEkRVu0wMIYz Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable * Ed Schouten wrote: > It's a bit more complex than that. Right now devices are automatically > numbered, using a 32-bits integer. The following macros are used to > obtain the minor and major numbers (see ): >=20 > | #define major(x) ((int)(((u_int)(x) >> 8)&0xff)) /* major number */ > | #define minor(x) ((int)((x)&0xffff00ff)) /* minor number */ >=20 > This means that a device number above 255 may (or may not) have a > non-zero major number. Just run the following code: That said, I really couldn't care less if we eventually just nuked the entire major/minor number distinction and let applications just print the dev_t directly. This means `ls -l' would just print a single number. POSIX doesn't standardize major/minor numbers anyway. Just the dev_t. Unfortunately I do realize this probably breaks a lot of high profile software. --=20 Ed Schouten WWW: http://80386.nl/ --YfqBrEkRVu0wMIYz Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (FreeBSD) iEYEARECAAYFAkrsinUACgkQ52SDGA2eCwXmAgCfZ/lLmeSjmhVTHTnlJjk7N50C CggAn0ciIHm47trl3f51TQHGIdX79PTF =6kfo -----END PGP SIGNATURE----- --YfqBrEkRVu0wMIYz--