[gPXE] Setting delay time to boot

[Jonathan Andrews]

On Sat, 2010-03-27 at 20:50 -0400, Miller, Shao wrote:
> Good day Fatih,
> 
> In regards to introducing delays into gPXE's execution, please see the
> "Customize" button found here[1].  While customizing, you may enable
> "TIME_CMD" under the "Command Line Options" section.  This corresponds
> to the same setting being #defined in gpxe/src/config/general.h and
> compiling gPXE yourself.  This gives you the 'time' and 'sleep'
> commands.  I think you are interested in the 'sleep' command, in
> particular.

What about a scripted command, something like:

waitfor IP PORT TIMEOUT

logic would be to repeat a tcp open until a connection is established or
timeout seconds (or maybe mins), timeout of zero is forever.

This way a client could hold not only until a machine is up, but until
service on a machine is up.  Im sure the HPC people would love it.

Cheers,
Jon