# Fedora Core 4 & udev **URL:** \ **Category:** USB Devices\ **Created:** [December 19, 2007, 4:26am UTC](https://forums.digi.com/t/fedora-core-4-udev/8047 "2007-12-19T04:26:06Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![mirrabooka](https://avatars.discourse-cdn.com/v4/letter/m/cc9497/32.png) [@mirrabooka](https://forums.digi.com/u/mirrabooka)\ **Post date:** [December 19, 2007, 4:26am UTC](https://forums.digi.com/t/fedora-core-4-udev/8047/1 "2007-12-19T04:26:06Z")
Hi all, I am having some trouble setting some file permissions on my digi port tty. At bootime I chowm 666 /dev/ttyb00 and same for /dev/ttyb01 , I have a 2 port digi neo server, this works fine until the dgrp\_daemon service is restarted and the permissions get lost for group and others. I have read a few of the posts in this forum and tried to add the MODE=“0666” in the 10-dgrp.rules and restarted the service but no luck. Could someone point me in the correct direction? I am hoping to get this working and tested on FC4 so that I can update my Red Hat Enterprice 5 box as it also has the same issue. Heres some info. This is output while unloading and loading the module. udevmonitor udevmonitor prints the received event from the kernel [UEVENT] and the event which udev sends out after rule processing [UDEV] UEVENT[1198036162] remove@/class/tty/tty\_dgrp\_b\_1 UEVENT[1198036162] remove@/class/tty/cu\_dgrp\_b\_1 UEVENT[1198036162] remove@/class/tty/pr\_dgrp\_b\_1 UEVENT[1198036162] remove@/class/tty/tty\_dgrp\_b\_0 UEVENT[1198036162] remove@/class/tty/cu\_dgrp\_b\_0 UEVENT[1198036162] remove@/class/tty/pr\_dgrp\_b\_0 UDEV [1198036162] remove@/class/tty/tty\_dgrp\_b\_1 UDEV [1198036162] remove@/class/tty/pr\_dgrp\_b\_1 UDEV [1198036162] remove@/class/tty/cu\_dgrp\_b\_1 UDEV [1198036162] remove@/class/tty/tty\_dgrp\_b\_0 UDEV [1198036162] remove@/class/tty/cu\_dgrp\_b\_0 UDEV [1198036162] remove@/class/tty/pr\_dgrp\_b\_0 UEVENT[1198036334] add@/class/tty/tty\_dgrp\_b\_0 UEVENT[1198036334] add@/class/tty/cu\_dgrp\_b\_0 UDEV [1198036334] add@/class/tty/cu\_dgrp\_b\_0 UEVENT[1198036334] add@/class/tty/pr\_dgrp\_b\_0 UEVENT[1198036334] add@/class/tty/tty\_dgrp\_b\_1 UEVENT[1198036334] add@/class/tty/cu\_dgrp\_b\_1 UEVENT[1198036334] add@/class/tty/pr\_dgrp\_b\_1 UDEV [1198036334] add@/class/tty/tty\_dgrp\_b\_0 UDEV [1198036334] add@/class/tty/cu\_dgrp\_b\_1 UDEV [1198036334] add@/class/tty/tty\_dgrp\_b\_1 UDEV [1198036334] add@/class/tty/pr\_dgrp\_b\_0 UDEV [1198036334] add@/class/tty/pr\_dgrp\_b\_1 cat 10-dgrp.rules KERNEL==“tty\_dgrp\*”,PROGRAM=“/usr/bin/dgrp\_udev %k”, NAME=“%c”, MODE=“0666” KERNEL==“cu\_dgrp\*”, PROGRAM=“/usr/bin/dgrp\_udev %k”, NAME=“%c” KERNEL==“pr\_dgrp\*”, PROGRAM=“/usr/bin/dgrp\_udev %k”, NAME=“%c” service dgrp\_daemon restart Stopping DGRP daemons: Daemon for id “a” (192.168.0.212): stopped. Daemon for id “b” (192.168.0.211): stopped. Starting DGRP daemons: Daemon for id “a” (192.168.0.212): started. Daemon for id “b” (192.168.0.211): started. [root@neptune dev]# l ttyb\* crw------- 1 root root 252, 0 Dec 19 14:22 ttyb00 crw------- 1 root root 252, 1 Dec 19 14:22 ttyb01 dmesg | grep dgrp dgrp: Digi RealPort driver version: 1.9-17 lsmod | grep dgrp dgrp 98364 2 modinfo dgrp filename: /lib/modules/2.6.17-1.2142\_FC4smp/misc/dgrp.ko description: RealPort driver for Digi’s ethernet-based serial connectivity product line author: Digi International, [http://www.digi.com](http://www.digi.com) license: GPL srcversion: 3972645A98C7DC703046C68 depends: vermagic: 2.6.17-1.2142\_FC4smp SMP mod\_unload 686 REGPARM 4KSTACKS gcc-4.0parm: rawreadok:Bypass flip buffers on input (int) parm: register\_cudevices:Turn on/off registering legacy cu devices (int) parm: register\_prdevices:Turn on/off registering transparent print devices (int) parm: net\_debug:Turn on/off net debugging (int) parm: mon\_debug:Turn on/off mon debugging (int) parm: comm\_debug:Turn on/off comm debugging (int) parm: tty\_debug:Turn on/off tty debugging (int) parm: ports\_debug:Turn on/off debugging of /proc/dgrp/ports (int) ---
**Author:** ![userid0](https://avatars.discourse-cdn.com/v4/letter/u/f6c823/32.png) [@userid0](https://forums.digi.com/u/userid0)\ **Post date:** [December 19, 2007, 1:53pm UTC](https://forums.digi.com/t/fedora-core-4-udev/8047/2 "2007-12-19T13:53:01Z")
Try the following UDEV rule syntax: KERNEL==“tty\_dgrp\*”, PROGRAM=“/usr/bin/dgrp\_udev %k”, NAME=“%c”, GROUP=“root”, MODE=“0666”, OPTIONS=“last\_rule” Test the permissions: 1. Run “udevcontrol reload\_rules” 2. /etc/init.d/dgrp\_daemon restart ---
**Author:** ![mirrabooka](https://avatars.discourse-cdn.com/v4/letter/m/cc9497/32.png) [@mirrabooka](https://forums.digi.com/u/mirrabooka)\ **Post date:** [December 21, 2007, 12:46am UTC](https://forums.digi.com/t/fedora-core-4-udev/8047/3 "2007-12-21T00:46:55Z")
Thanks! that worked very well. Geo