Date: Fri, 1 Apr 2005 20:02:45 +0200 From: Roland Smith <rsmith@xs4all.nl> To: Martin McCormick <martin@dc.cis.okstate.edu> Cc: freebsd-questions@freebsd.org Subject: Re: Best Practice for Allowing non-root Users Access to Serial Port? Message-ID: <20050401180245.GB84746@slackbox.xs4all.nl> In-Reply-To: <200504011717.j31HHE9S080897@dc.cis.okstate.edu> References: <200504011717.j31HHE9S080897@dc.cis.okstate.edu>
next in thread | previous in thread | raw e-mail | index | archive | help
--RASg3xLB4tUQ4RcS Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Apr 01, 2005 at 11:17:14AM -0600, Martin McCormick wrote: > What is the safest way to let non-root users access > /dev/ttyd0? I notice that in FreeBSD, /dev/ttydx is owned by > root:wheel. In linux, the ttySx's are in a special group so the trick > there is to add users to that group and make sure the ttyS's are group > writable. >=20 > Here, I want the users to be able to use C-kermit to talk to a > remote device without them having to be root. Since you want to dial out, I think you'll need to use /dev/cuaa*. Making kermit users members of a group, and have that group own /dev/cuaa* with read/write privileges seems like a good idea. For instance, create a group "kermit" with 'pw groupadd kermit'. Then you can use devfs(8) to change the ownership and permissions of the relevant device: "devfs rule add path 'cuaa*' mode 0660 group kermit". This setting will not survive a reboot, so you'll have to add the following to /etc/devfs.rules: "add path 'cuaa*' mode 0660 group kermit". Now add the relevant users to the group kermit:=20 'pw groupmod kermit -m foo,bar,baz' Roland --=20 R.F. Smith /"\ ASCII Ribbon Campaign r s m i t h @ x s 4 a l l . n l \ / No HTML/RTF in e-mail http://www.xs4all.nl/~rsmith/ X No Word docs in e-mail public key: http://www.keyserver.net / \ Respect for open standards --RASg3xLB4tUQ4RcS Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (FreeBSD) iD8DBQFCTYzFEnfvsMMhpyURAqZbAKCLENdHH6OUFXEMtahOSp8xPtzjZgCgpy0z QWZ9R1wVp8F/cMKRC65IYe0= =aiju -----END PGP SIGNATURE----- --RASg3xLB4tUQ4RcS--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20050401180245.GB84746>