Bug 85463 – udev gives wrong permissions to /dev/sg0

• Product: Gentoo Linux
• Status: RESOLVED CANTFIX

[Description marco 2005-03-15 23:07:56 UTC]

When I hotplug my usb burner, udev generates /dev/sg0, but it's owned all by root.
 Thus only root can burn CDs. To change this i have inserted the folowing line into. 
/etc/udev/rules.d/50-udev.rules

BUS="scsi", KERNEL="s[grt][0-9]*", SYSFS_type="5", NAME="%k", MODE="0660", GROUP="cdrom"

think this line should be inluded as a default. I'm using sys-fs/udev-54.

Reproducible: Always
Steps to Reproduce:
1.
2.
3.




emerge info 
Portage 2.0.51.19 (default-linux/x86/2004.0, gcc-3.4.3, glibc-2.3.4.20050125-r0, 
2.6.11-gentoo-r3 i686) 
================================================================= 
System uname: 2.6.11-gentoo-r3 i686 Intel(R) Celeron(R) CPU 1.70GHz 
Gentoo Base System version 1.6.10 
Python:              dev-lang/python-2.3.5 [2.3.5 (#1, Feb 18 2005, 08:58:45)] 
dev-lang/python:     2.3.5 
sys-devel/autoconf:  2.13, 2.59-r6 
sys-devel/automake:  1.8.5-r3, 1.7.9-r1, 1.5, 1.9.5, 1.6.3, 1.4_p6 
sys-devel/binutils:  2.15.92.0.2-r6 
sys-devel/libtool:   1.5.14 
virtual/os-headers:  2.6.8.1-r2 
ACCEPT_KEYWORDS="x86 ~x86" 
AUTOCLEAN="yes" 
CFLAGS="-march=i686 -O3 -pipe -fomit-frame-pointer" 
CHOST="i686-pc-linux-gnu" 
CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.3/env /usr/kde/3.3/share/config /usr/kde/3.3/shutdown /usr/kde/3/share/config /usr/lib/X11/xkb /usr/share/config /var/qmail/control" 
CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" 
CXXFLAGS="-march=i686 -O3 -pipe -fomit-frame-pointer" 
DISTDIR="/usr/portage/distfiles" 
FEATURES="autoaddcvs autoconfig ccache distlocks sandbox sfperms" 
GENTOO_MIRRORS="ftp://pandemonium.tiscali.de/pub/gentoo/" 
MAKEOPTS="-j2" 
PKGDIR="/usr/portage/packages" 
PORTAGE_TMPDIR="/var/tmp" 
PORTDIR="/usr/portage" 
PORTDIR_OVERLAY="/usr/local/portage" 
SYNC="rsync://rsync.gentoo.org/gentoo-portage" 
USE="x86 X aalib acpi alsa apm arts audiofile avi bash-completion berkdb bindist 
bitmap-fonts bluetooth cdr cjk crypt cups curl directfb divx4linux dvd dvdr dvdread 
emboss encode esd ethereal fam flac font-server foomaticdb fortran gdbm ggi gif 
gphoto2 gpm gps gstreamer gtk gtk2 imagemagick imlib ipv6 irmc jabber jack java 
jpeg kde kdepim ldap lesstif libg++ libwwwlirc mad memlimit mikmod mmx motif 
mp3 mpeg mssql mysql nas ncurses nls odbc oggvorbis opengl oss pam pdflib perl png 
pnp python qt quicktime readline real ruby samba scanner sdl slang snmp speex spell 
sse ssl svg svga tcltk tcpd tiff truetype truetype-fonts type1-fonts usb xine xml xml2 
xmms xosd xv xvid zlib" 
Unset:  ASFLAGS, CBUILD, CTARGET, LANG, LC_ALL, LDFLAGS

[Comment 1 Greg Kroah-Hartman (RETIRED) 2005-03-23 23:45:36 UTC]

Use the /dev/cdrom symlinks instead.  They will point to the proper device.

We can't make this a generic "sg is always a cdrom" rule, as that is not the case for 99% of the time.

[Comment 2 Jakub Moc (RETIRED) 2005-07-15 10:58:08 UTC]

*** Bug 99137 has been marked as a duplicate of this bug. ***

[Comment 3 Colin Tinker 2005-07-15 11:25:38 UTC]

k3b will not allow normal users to write a cd unless sg* is also in the cdrom 
group even thought it is pointing at cdrom -----> sr0.  I am not a programmer 
but surely udev could interrogate the device and if it was a cdrom put it in 
the correct group? 

[Comment 4 Greg Kroah-Hartman (RETIRED) 2005-07-15 21:56:04 UTC]

If you can figure out a way, sure.  But you should not need sg to write a
cdrom, right?