stty: TCGETS: Operation not supported on socket

Cause

This message results when a user tries to remote copy with rcp(1) or remote shell with rsh(1) from one machine to another, but has an stty(1) command in the remote .cshrc file. This error results in failure of the rcp(1) or rsh(1) command.

Action

The solution is to move the invokation of the stty(1) command to the user's .login (or equivalent) file. Alternatively, execute the stty(1) command in .cshrc only when the shell is interactive. Here is a test to do that:

if ($?prompt) stty ...

Technical Notes

The rcp(1) and rsh(1) commands make a connection using sockets, which do not support stty(1)'s TCGETS ioctl.