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jaripetteri
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Joined: 26 Feb 2004
Posts: 8
Location: Tampere, Finland
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 Posted: Sat Aug 14, 2004 12:37 pm Post subject: howto add +rw permission to ttyS0 for digitemp |
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I'm installing digitemp package but can't get it work becouse digitemp (or root) has only read permission to serial port.
| Code: | | lr-xr-xr-x 1 root root 5 Aug 14 14:28 /dev/ttyS0 -> tts/0 |
How do I give write permission to anyone becouse root owns the file and doesn't have write permission...
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gnuageux
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jaripetteri
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Joined: 26 Feb 2004
Posts: 8
Location: Tampere, Finland
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| Posted: Sat Aug 14, 2004 12:45 pm Post subject: |
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yep. root owns and has only read permission...
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lbrtuk
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Joined: 08 May 2003
Posts: 910
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| Posted: Sun Aug 15, 2004 2:07 am Post subject: |
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| The permissions for that are set automatically by devfs (or udev), so you'll have to edit /etc/devfsd.conf to tell it to give different permissions to the device on boot. |
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jaripetteri
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Joined: 26 Feb 2004
Posts: 8
Location: Tampere, Finland
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| Posted: Mon Aug 16, 2004 8:12 pm Post subject: |
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hymm... what exactly I need to put or change on /etc/devfsd.conf ? 
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lbrtuk
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Joined: 08 May 2003
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| Posted: Mon Aug 16, 2004 10:08 pm Post subject: |
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Well, for instance, adding
| Code: | | REGISTER ttyS0 PERMISSIONS root.root 0666 |
would allow all to read or write to ttyS0. |
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jaripetteri
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Joined: 26 Feb 2004
Posts: 8
Location: Tampere, Finland
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| Posted: Tue Aug 17, 2004 6:40 am Post subject: |
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Thanks, I'll try that. I just didn't find anything tty related on file.
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jaripetteri
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Joined: 26 Feb 2004
Posts: 8
Location: Tampere, Finland
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| Posted: Tue Aug 17, 2004 6:53 pm Post subject: |
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no. I add the line and reboot but still root doesn't have the rw permission to ttyS0...
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jaripetteri
n00b
Joined: 26 Feb 2004
Posts: 8
Location: Tampere, Finland
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| Posted: Sun Aug 22, 2004 7:37 am Post subject: |
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I don't get it. Still no rw permission for root. Here is my /etc/devfsd.conf is it ok? What else I can try?
| Code: | # Sample /etc/devfsd.conf configuration file.
# Richard Gooch <rgooch@atnf.csiro.au> 3-JUL-2000
#
# The Gentoo Linux Team - http://www.gentoo.org/
# - Many fixes, etc
#
# $Header: /home/cvsroot/gentoo-src/rc-scripts/etc/devfsd.conf,v 1.16 2003/05/18 21:51:34 azarah Exp $
# Enable full compatibility mode for old device names. You may comment these
# out if you don't use the old device names. Make sure you know what you're
# doing!
REGISTER .* MKOLDCOMPAT
UNREGISTER .* RMOLDCOMPAT
# You may comment out the above and uncomment the following if you've
# configured your system to use the original "new" devfs names or the really
# new names
#REGISTER vc/.* MKOLDCOMPAT
#UNREGISTER vc/.* RMOLDCOMPAT
#REGISTER pty/.* MKOLDCOMPAT
#UNREGISTER pty/.* RMOLDCOMPAT
#REGISTER misc MKOLDCOMPAT
#UNREGISTER misc RMOLDCOMPAT
# You may comment these out if you don't use the original "new" names
REGISTER .* MKNEWCOMPAT
UNREGISTER .* RMNEWCOMPAT
# Enable module autoloading. You may comment this out if you don't use
# autoloading
LOOKUP .* MODLOAD
# Uncomment the following if you want to set the group to "tty" for the
# pseudo-tty devices. This is necessary so that mesg(1) can later be used to
# enable/disable talk requests and wall(1) messages.
#REGISTER ^pty/s.* PERMISSIONS -1.tty 0600
#REGISTER ^pts/.* PERMISSIONS -1.tty 0600
REGISTER ttyS0 PERMISSIONS root.root 0666
# Uncomment this if you want permissions to be saved and restored
# NB: Do NOT change the following!
# Do not do this for pseudo-terminal devices
REGISTER ^pt[sy]/.* IGNORE
CHANGE ^pt[sy]/.* IGNORE
CREATE ^pt[sy]/.* IGNORE
DELETE ^pt[sy] IGNORE
REGISTER ^log IGNORE
CHANGE ^log IGNORE
CREATE ^log IGNORE
DELETE ^log IGNORE
REGISTER .* COPY /lib/dev-state/$devname $devpath
CHANGE .* COPY $devpath /lib/dev-state/$devname
CREATE .* COPY $devpath /lib/dev-state/$devname
DELETE .* CFUNCTION GLOBAL unlink /lib/dev-state/$devname
RESTORE /lib/dev-state
# You can force default like this :
# PERMISSIONS owner_and_group access_mode
# Video4Linux devices
REGISTER v4l/.* PERMISSIONS root.video 660
# ALSA/OSS stuff
# Comment/change these if you want to change the permissions on
# the audio devices
LOOKUP snd MODLOAD ACTION snd
LOOKUP dsp MODLOAD
LOOKUP mixer MODLOAD
LOOKUP midi MODLOAD
REGISTER sound/.* PERMISSIONS root.audio 660
REGISTER snd/.* PERMISSIONS root.audio 660
# Uncomment this to let PAM manage devfs
#REGISTER .* CFUNCTION /lib/security/pam_console_apply_devfsd.so pam_console_apply_single $devpath
# Autoload the sg module if generic scsi driver compiled as module.
#LOOKUP ^sg$ MODLOAD ACTION sg
# Give the cdrw group write permissions to /dev/sg0
# This is done to have non root user use the burner (scan the scsi bus)
#REGISTER ^scsi/host.*/bus.*/target.*/lun.*/generic PERMISSIONS root.cdrw 660
# General note for the following auto creation of symlinks:
#
# If you change the device that the symlink points to,
# you should also remove the symlink before restarting
# devfsd
# Create /dev/cdrom for the first cdrom drive
LOOKUP ^cdrom$ CFUNCTION GLOBAL mksymlink cdroms/cdrom0 cdrom
REGISTER ^cdroms/cdrom0$ CFUNCTION GLOBAL mksymlink $devname cdrom
UNREGISTER ^cdroms/cdrom0$ CFUNCTION GLOBAL unlink cdrom
# Create /dev/dvd for the second cdrom drive
# (change 'cdroms/cdrom1' to suite your setup)
# NOTE: We add the fully qualified path here, else some apps
# have problems to resolve the true device (drip comes to mind)
#LOOKUP ^dvd$ CFUNCTION GLOBAL mksymlink ${mntpnt}/cdroms/cdrom1 dvd
#REGISTER ^cdroms/cdrom1$ CFUNCTION GLOBAL mksymlink ${devpath} dvd
#UNREGISTER ^cdroms/cdrom1$ CFUNCTION GLOBAL unlink dvd
# Create /dev/cdrw for the first cdrom on the scsi bus
# (change 'sr0' to suite your setup)
#LOOKUP ^cdrw$ CFUNCTION GLOBAL mksymlink sr0 cdrw
#REGISTER ^sr0$ CFUNCTION GLOBAL mksymlink $devname cdrw
#UNREGISTER ^sr0$ CFUNCTION GLOBAL unlink cdrw
# Create /dev/mouse
LOOKUP ^mouse$ CFUNCTION GLOBAL mksymlink misc/psaux mouse
REGISTER ^misc/psaux$ CFUNCTION GLOBAL mksymlink $devname mouse
UNREGISTER ^misc/psaux$ CFUNCTION GLOBAL unlink mouse
# Manage USB mouse
REGISTER ^input/mouse0$ CFUNCTION GLOBAL mksymlink $devname usbmouse
UNREGISTER ^input/mouse0$ CFUNCTION GLOBAL unlink usbmouse
REGISTER ^input/mice$ CFUNCTION GLOBAL mksymlink $devname usbmouse
UNREGISTER ^input/mice$ CFUNCTION GLOBAL unlink usbmouse
# Support additional config installed by packages ...
INCLUDE /etc/devfs.d
# devfsd.conf ends here
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Shark63
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Joined: 16 Aug 2004
Posts: 11
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| Posted: Thu Jan 13, 2005 1:27 pm Post subject: |
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Hey, I have run into same trouble with rw permission for serial port. I'm wondering if any of you guys solved this issue, if so, could you please advise me.
Thanks |
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gnychis
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Joined: 23 Mar 2005
Posts: 1004
Location: Pittsburgh, PA
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| Posted: Thu Jun 02, 2005 10:33 pm Post subject: |
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bump
has anyone figured this out? |
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gnychis
Veteran
Joined: 23 Mar 2005
Posts: 1004
Location: Pittsburgh, PA
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| Posted: Fri Jun 03, 2005 4:06 am Post subject: |
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solved it by specifying the device with:
| Code: | | digitemp -s /dev/ttyS0 -i |
for instance  |
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