[Pkg-shadow-devel] Bug#731662: newgrp: can not update the current real group ID

[Osamu Aoki]

Package: login
Version: 1:4.1.5.1-1
Severity: normal

Under GNOME DE, I can not change the current group ID with "newgrp"

Neither gid= nor groups= are updated by newgrp.  Only login updates
groups=...

This is not what I expected from the manpage.  I think it used to work.

This may be a new feature under some DE (with PAM) ,... then we need to
update manpage of newgrp with some reminder.

(I was reminded of this for my previous sbuild wiki page update by
Reuben Thomas)

Here is a simple test case using the ntp group:

$ sudo adduser osamu ntp
Adding user `osamu' to group `ntp' ...
Adding user osamu to group ntp
Done.
$ grep ntp /etc/group
ntp:x:140:osamu
$ newgrp -
osamu at goofy:~$ id
uid=1000(osamu) gid=1000(osamu) groups=1000(osamu),7(lp),24(cdrom),25(floppy),27(sudo),29(audio),30(dip),44(video),46(plugdev),108(bluetooth),109(lpadmin),111(netdev),116(fuse),129(sbuild),144(wireshark),999(bumblebee),9999(buildd-ddp)
osamu at goofy:~$ logout
$ newgrp
$ id
uid=1000(osamu) gid=1000(osamu) groups=1000(osamu),7(lp),24(cdrom),25(floppy),27(sudo),29(audio),30(dip),44(video),46(plugdev),108(bluetooth),109(lpadmin),111(netdev),116(fuse),129(sbuild),144(wireshark),999(bumblebee),9999(buildd-ddp)
osamu at goofy:~$ sudo login
goofy login: osamu
Password: 
Last login: Sun Dec  8 09:43:40 JST 2013 on pts/1
Linux goofy 3.11-2-amd64 #1 SMP Debian 3.11.10-1 (2013-12-04) x86_64
 ... (skip)
osamu at goofy:~$ id
uid=1000(osamu) gid=1000(osamu) groups=1000(osamu),7(lp),24(cdrom),25(floppy),27(sudo),29(audio),30(dip),44(video),46(plugdev),108(bluetooth),109(lpadmin),111(netdev),116(fuse),129(sbuild),140(ntp),144(wireshark),999(bumblebee),9999(buildd-ddp)


-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.11-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages login depends on:
ii  libc6           2.17-97
ii  libpam-modules  1.1.3-10
ii  libpam-runtime  1.1.3-10
ii  libpam0g        1.1.3-10

login recommends no packages.

login suggests no packages.

-- no debconf information