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# Listen on the given port and for every connection, start a new
# command (defaults to $SHELL) in the background on the accepted fd.
# WARNING: this can leave your host open to the universe. For use
# in a restricted fashion on a secure network.
#
# Remote logins are much more efficient...
local TCP_LISTEN_FD
trap '[[ -n $TCP_LISTEN_FD ]] && ztcp -c $TCP_LISTEN_FD; return 1' \
HUP INT TERM EXIT PIPE
if [[ $1 != <-> ]]; then
print "Usage: $0 port [cmd args... ]" >&2
return 1
fi
integer port=$1
shift
ztcp -l $port || return 1
TCP_LISTEN_FD=$REPLY
(( $# )) || set -- ${SHELL:-zsh}
local cmd=$1
shift
while ztcp -a $TCP_LISTEN_FD; do
# hack to expand aliases without screwing up arguments
eval $cmd '$* <&$REPLY >&$REPLY 2>&$REPLY &'
# Close the session fd; we don't need it here any more.
ztcp -c $REPLY
done
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