I share this because no one else seems to understand. Assume you
want to change owner of /dev/ttyS0 to user when user logs in. Otherwise
it reverts to root.
Observe that there is a place on /etc where you can do things. So we
will first try /etc/console and see what's there. Nothing. Now try
/etc/security/. This is interesting and you see:
[root@k5di security]# ls
access.conf console.perms namespace.conf pam_winbind.conf
chroot.conf console.perms.d namespace.init sepermit.conf
console.apps group.conf opasswd time.conf
console.handlers limits.conf pam_env.conf
Now you see console.perms and console.perms.d. Here is what these files
look like:
[root@k5di security]# more console.perms.d
*** console.perms.d: directory ***
# /etc/security/console.perms
#
# This file determines the permissions that will be given to priviledged
# users of the console at login time, and the permissions to which to
# revert when the users log out.
# format is:
# <class>=list of regexps specifying consoles or globs specifying files
# file-glob|<class> perm dev-regex|<dev-class> \
# revert-mode revert-owner[.revert-group]
# the revert-mode, revert-owner, and revert-group are optional, and default
# to 0600, root, and root, respectively.
#
# For more information:
# man 5 console.perms
#
# This file should not be modified.
# Rather a new file in the console.perms.d directory should be created.
# file classes -- these are regular expressions
<console>=tty[0-9][0-9]* vc/[0-9][0-9]* :[0-9]+\.[0-9]+ :[0-9]+
<xconsole>=:[0-9]+\.[0-9]+ :[0-9]+
** Joe's Own Editor v3.5 ** (utf-8) ** Copyright © 2006 **
Now go to the console.perms.d directory
[root@k5di security]# cd console.perms.d
[root@k5di console.perms.d]# ls
50-default.perms ttyS0.perms
[root@k5di console.perms.d]#
And ttyS0.perms is:
[root@k5di console.perms.d]# more ttyS0.perms
# this file should give /dev/ttyS0 proper priv's for me.
#device classes
<ttyS0>=/dev/ttyS0
# permission definitions
<console> 0600 <ttyS0> 0600 root.uucp
[root@k5di console.perms.d]#
and this works fine, of course.
Karl
--
Karl F. Larsen, AKA K5DI
Linux User
#450462 http://counter.li.org.
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