Bug#546923: openssh-server: no way to unset forcecommand

[Tollef Fog Heen <tfheen@ubuntu.com>]

Package: openssh-server
Version: 1:5.1p1-7
Severity: wishlist

I have something like:

Match group foo
      ForceCommand /restricted/command
      AllowTcpForwarding no
      X11Forwarding no

in sshd_config.

Now, for one person in that group, I would like to unset forcecommand,
but «ForceCommand no» does not work.  I ended up having to write a silly
script which probably has problems with whitespace/quoting issues:

#! /bin/sh

if [ "$SSH_ORIGINAL_COMMAND" ]; then
   exec $SSH_ORIGINAL_COMMAND
fi

exec $(getent passwd  $(id -u) | cut -d: -f7)

Would it be possible to have «ForceCommand no» just unset the forced
command instead?

-- System Information:
Debian Release: squeeze/sid
  APT prefers testing
  APT policy: (500, 'testing'), (50, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.30-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=nb_NO.UTF-8, LC_CTYPE=nb_NO.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages openssh-server depends on:
ii  adduser                3.110             add and remove users and groups
ii  debconf [debconf-2.0]  1.5.27            Debian configuration management sy
ii  dpkg                   1.15.3.1+b1       Debian package management system
ii  libc6                  2.9-25            GNU C Library: Shared libraries
ii  libcomerr2             1.41.9-1          common error description library
ii  libgssapi-krb5-2       1.7dfsg~beta3-1   MIT Kerberos runtime libraries - k
ii  libk5crypto3           1.7dfsg~beta3-1   MIT Kerberos runtime libraries - C
ii  libkrb5-3              1.7dfsg~beta3-1   MIT Kerberos runtime libraries
ii  libpam-modules         1.0.1-10          Pluggable Authentication Modules f
ii  libpam-runtime         1.0.1-10          Runtime support for the PAM librar
ii  libpam0g               1.0.1-10          Pluggable Authentication Modules l
ii  libselinux1            2.0.85-4          SELinux runtime shared libraries
ii  libssl0.9.8            0.9.8k-4          SSL shared libraries
ii  libwrap0               7.6.q-18          Wietse Venema's TCP wrappers libra
ii  lsb-base               3.2-23            Linux Standard Base 3.2 init scrip
ii  openssh-blacklist      0.4.1             list of default blacklisted OpenSS
ii  openssh-client         1:5.1p1-7         secure shell client, an rlogin/rsh
ii  procps                 1:3.2.8-1         /proc file system utilities
ii  zlib1g                 1:1.2.3.3.dfsg-15 compression library - runtime

Versions of packages openssh-server recommends:
ii  openssh-blacklist-extra       0.4.1      list of non-default blacklisted Op
ii  xauth                         1:1.0.3-2  X authentication utility

Versions of packages openssh-server suggests:
pn  molly-guard                   <none>     (no description available)
pn  rssh                          <none>     (no description available)
pn  ssh-askpass                   <none>     (no description available)
pn  ufw                           <none>     (no description available)

-- debconf information:
  ssh/vulnerable_host_keys:
  ssh/new_config: true
* ssh/use_old_init_script: true
  ssh/encrypted_host_key_but_no_keygen:
  ssh/disable_cr_auth: false

-- 
Tollef Fog Heen 
Redpill Linpro -- Changing the game!
t: +47 21 54 41 73