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  1. RHEL
  2. RHEL-17627

Ksh allows exiting restricted mode, besides documented as not allowing

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      +++ This bug was initially created as a clone of Bug #1948586 +++

      From manual page:

      -r Enables the restricted shell. This option cannot be
      unset once set.

      But one can exit it with:

      $ set +r

      One can work an a restricted shell with:

      + Create a ~/.profile that sets PATH to, for example, /rbin
      + Add symbolic links to /rbin, e.g.

      1. ln -sf /bin/ls /rbin
        + Remove any unwanted environment variable or function from
        ~/.profile with unset.

      Above works with bash, on basic tests using .bash_profile:

      export PATH=/rbin
      unset command_not_found_handle

      and user shell set to /bin/rbash

      Restricted shells overall are somewhat of a fragile solution,
      but if the environment is really very small, it is a somewhat
      safe option.

              kvolny Karel Volný
              rhn-support-pandrade Paulo Andrade
              Lukáš Zaoral Lukáš Zaoral
              Karel Volný Karel Volný
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