RSH(C)                   XENIX System V                    RSH(C)



     Name
          rsh - Invokes a restricted shell (command interpreter).

     Syntax
          rsh [ flags ] [ name [ arg1 ... ] ]

     Description
          rsh is a restricted version of the standard command
          interpreter sh(C).  It is used to set up login names and
          execution environments whose capabilities are more
          controlled than those of the standard shell.  The actions of
          rsh are identical to those of sh, except that changing
          directory with cd, setting the value of $PATH, using command
          names containing slashes, and  redirecting output using >
          and >> are all disallowed.

          When invoked with the name -rsh, rsh reads the user's
          .profile (from $HOME/.profile).  It acts as the standard sh
          while doing this, except that an interrupt causes an
          immediate exit, instead of causing a return to command
          level.  The restrictions above are enforced after .profile
          is interpreted.

          When a command to be executed is found to be a shell
          procedure, rsh invokes sh to execute it.  Thus, it is
          possible to provide to the end user shell procedures that
          have access to the full power of the standard shell, while
          restricting him to a limited menu of commands; this scheme
          assumes that the end user does not have write and execute
          permissions in the same directory.

          The net effect of these rules is that the writer of the
          .profile has complete control over user actions, by
          performing guaranteed setup actions, then leaving the user
          in an appropriate directory (probably not the login
          directory).

          rsh is actually just a link to sh and any flags arguments
          are the same as for sh(C).

          The system administrator often sets up a directory of
          commands that can be safely invoked by rsh.

     See Also
          sh(C), profile(M)










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