>Number:         33054
>Category:       bin
>Synopsis:       id(1) sometimes report a duplicate group without specified user
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Mar 11 00:25:00 +0000 2006
>Originator:     Nicolas Joly
>Release:        NetBSD 3.99.16
>Organization:
Institut Pasteur, Paris.
>Environment:
System: NetBSD cixy.dial.pasteur.fr 3.99.16 NetBSD 3.99.16 (CIXY) #8: Thu Mar 9 23:01:17 CET 2006 njoly@cixy.dial.pasteur.fr:/local/src/NetBSD/obj/i386/sys/arch/i386/compile/CIXY i386
Architecture: i386
Machine: i386
>Description:
id(1) sometimes return a duplicate group (primary one) when called with `-G'
flag and without a specified user.

njoly@cixy [~]> id
uid=1000(njoly) gid=100(users) groups=0(wheel),5(operator),100(users)
root@cixy [~]# id njoly
uid=1000(njoly) gid=100(users) groups=100(users),0(wheel),5(operator)

njoly@cixy [~]> id -Gn
users wheel operator users
njoly@cixy [~]> id -Gn njoly
users wheel operator

Some other cases does not seems to be affected :

root@cixy [~]# id
uid=0(root) gid=0(wheel) groups=0(wheel),2(kmem),3(sys),4(tty),5(operator),20(staff),31(guest)
root@cixy [~]# id root
uid=0(root) gid=0(wheel) groups=0(wheel),2(kmem),3(sys),4(tty),5(operator),20(staff),31(guest)

root@cixy [~]# id -Gn
wheel kmem sys tty operator staff guest
root@cixy [~]# id -Gn root
wheel kmem sys tty operator staff guest

The groups order is not really important (except for consistency), but the
duplicate groups are more annoying.

>How-To-Repeat:
check `id -Gn' vs. `id -Gn <user>' output.
>Fix:
don't know