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Sys::Hostname - Try every conceivable way to get hostname
use Sys::Hostname;
$host = hostname;
Attempts several methods of getting the system hostname and
then caches the result. It tries the first available of the C
library's gethostname(), `$Config{aphostname}`, uname(2),
syscall(SYS_gethostname), `hostname`, `uname -n`,
and the file /com/host. If all that fails it croaks.
All NULs, returns, and newlines are removed from the result.
David Sundstrom <sunds@asictest.sc.ti.com>
Texas Instruments
XS code added by Greg Bacon <gbacon@cs.uah.edu>