rsh(C)
rsh --
invoke 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 shell procedures to the end user that have
access to the full power of the standard shell, while restricting
the user 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.
The system administrator often sets up a directory of commands that
can be safely invoked by rsh.
Open UNIX 8 compatibility notes
When running ACP on Open UNIX 8 and UnixWare 7 systems,
set OSRCMDS=on to use
the SCO OpenServer version of the <rsh> command.
This provides the expected behaviors
for SCO OpenServer applications.
The SCO OpenServer version of this command
is also provided on Open UNIX 8 systems under the OSP feature
See the
Running SCO OpenServer Applications
topic in the Open UNIX 8 documentation set.
See also
profile(M),
sh(C)
Standards conformance
rsh is conformant with
AT&T SVID Issue 2.
© 2003 Caldera International, Inc. All rights reserved.
SCO OpenServer Release 5.0.7 -- 11 February 2003