hang on exit bug under Linux

[Markus Friedl]

On Mon, Dec 10, 2001 at 10:50:06AM -0800, Dan Kaminsky wrote:
> Look: ssh user at host "command" needs to never, ever hang.

wrong.

it needs to hang.

it needs to hang until it can be sure that 'command' does not need
any input.

it needs to hang until it can be sure that 'command' does not produce
any output.

it needs to hang until 'command' exits because sshd needs to tell
the exit status from 'command' to ssh.

	$ ssh -n host 'exec > /dev/null 2>&1; sleep 3; exit 5' 
	$ echo $?

and so on.