XCOM parameter      ==  XCOM=filterCommand
XFIL parameter      ==  XFIL=filterCommand
                    --  default: none

XCOM and XFIL is used together with SERVER="exec" parameter. A special protocol name "exec" means executing some local command rather than connecting to a server. With "exec", DeleGate will work like simple inetd or wrapper. What will be executed is specified with either XCOM or XFIL parameter. Commands executed as XCOM will be given standard I/O which are bound for a socket connected to the client. Commands executed as XFIL will be given standard I/O which are redirected to a pair of pipes bound for DeleGate, which relays it to and from the client.

On WindowsNT and OS/2, commands executed as XCOM will be given a environment variable "SOCKHANDLE_CLIENT" which have the handle value of the inherited socket connected to the client.