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2.7) Why do I get [some strange error message] when I "rsh host command" ?
(We're talking about the remote shell program "rsh" or sometimes
"remsh" or "remote"; on some machines, there is a restricted shell
called "rsh", which is a different thing.)
If your remote account uses the C shell, the remote host will
fire up a C shell to execute 'command' for you, and that shell
will read your remote .cshrc file. Perhaps your .cshrc contains
a "stty", "biff" or some other command that isn't appropriate for
a non-interactive shell. The unexpected output or error message
from these commands can screw up your rsh in odd ways.
Here's an example. Suppose you have
stty erase ^H
biff y
in your .cshrc file. You'll get some odd messages like this.
% rsh some-machine date
stty: : Can't assign requested address
Where are you?
Tue Oct 1 09:24:45 EST 1991
You might also get similar errors when running certain "at" or
"cron" jobs that also read your .cshrc file.
Fortunately, the fix is simple. There are, quite possibly, a
whole *bunch* of operations in your ".cshrc" (e.g., "set
history=N") that are simply not worth doing except in interactive
shells. What you do is surround them in your ".cshrc" with:
if ( $?prompt ) then
operations....
endif
and, since in a non-interactive shell "prompt" won't be set, the
operations in question will only be done in interactive shells.
You may also wish to move some commands to your .login file; if
those commands only need to be done when a login session starts
up (checking for new mail, unread news and so on) it's better to
have them in the .login file.
User Contributions:Top Document: Unix - Frequently Asked Questions (2/7) [Frequent posting] Previous Document: How do I rename "*.foo" to "*.bar", or change file names to lowercase? Next Document: How do I ... and have that change affect my current shell? Part1 - Part2 - Part3 - Part4 - Part5 - Part6 - Part7 - Single Page [ Usenet FAQs | Web FAQs | Documents | RFC Index ] Send corrections/additions to the FAQ Maintainer: tmatimar@isgtec.com (Ted Timar)
Last Update March 27 2014 @ 02:12 PM
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