tout_pipe command input forever
This command executes the unix shell command with input. If
forever is 0, the command is terminated if it takes more than a specific
amount of time (currently 5 seconds). A value of forever other than 0
causes the tout_pipe command to wait until command has finished.
The stdout and stderr streams from command appear in the appropriate
output window. The command returns 0 for success, -1 for failure.
NOTE: This command may not be implemented on all platforms.