RE: do I really need to be in all those /etc/groups?
I was wondering something similar myself.
But, sadly, groups don't cascade or anything, so you can not do something
like
all_hardware_group:x:user1
just_cdrom_group:x:user2
and find any sort of perms on /dev/cdrom (or your local equivalent) that
will let that work.
Of course, on my single user machine, the hardware group plan will work
fine.
-----Original Message-----
From: Dan Jacobson [mailto:jidanni@dman.ddts.net]
Sent: Sunday, January 12, 2003 1:01 AM
To: debian-user@lists.debian.org
Subject: do I really need to be in all those /etc/groups?
Just look at me,
$ id
uid=1000(jidanni) gid=1000(jidanni)
groups=1000(jidanni),20(dialout),24(cdrom),29(audio),1004(scanner)
My latest addgroup was disk, so I wouldn't get error messages when
eject(1)ing USBs. However $ find /dev |wc -l
5142
$ find /dev -group disk -perm -20|wc -l
4006
that gives me write permission to most of /dev.
By the way, those error messages were
eject: unable to open `/dev/sda1' #if my id(1) is not in the group "disk",
or
eject: unable to eject, last error: Invalid argument #if it is. Either way,
it still does its job. One has to be root to not get the annoying messages.
System is debian 2.4.19-k7.
Another item is I can switch groups with ease,
$ newgrp disk
$ newgrp dialout
$ newgrp jidanni
Password: ******
Sorry.
Except for my own group, which fails when I give my login passwd... Maybe I
didn't read the manual. But more exciting is when run in a emacs *shell*
window, $ newgrp disk Segmentation fault $ newgrp dialout Segmentation fault
$ newgrp jidanni
Password: ******
Sorry.
$ newgrp audio
Segmentation fault
$ reportbug -f newgrp
P.S. even after doing
# deluser user group #(PPS: can use addgroup this way but not delgroup!) the
processes still have those privileges until they die. But I guess that is
how the system is designed.
--
http://jidanni.org/ Taiwan(04)25854780
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