authbind-helper - helper program to bind sockets to privileged ports without root

       See authbind(1) for details of the access control regime implemented by helper.

authbind  and  this  manpage  were  written  by  Ian Jackson.  They are Copyright (C)1998,2012 by him and
       released under the GNU General Public Licence; there is NO WARRANTY.  See /usr/doc/authbind/copyright and
       /usr/doc/copyright/GPL for details.

Debian Project                                  30th August 1998                              AUTHBIND-HELPER(8)

helper  is  the program used by libauthbind, which is in turn used by authbind to allow programs which do
       not or should not run as root to bind to low-numbered ports in a controlled way.  See authbind(1).

       It may also be used standalone, i.e. without assistance from authbind.  Its standard input  should  be  a
       TCP/IP socket, and it should be passed two or three arguments.

       The  arguments are the address and port number, respectively, to which the caller desires that the socket
       be bound, and the address family (ommitted for IPv4; the fixed string 6 for IPv6).  addr4-hex  and  port-hex  should  be  hex  strings,  without  leading  0x,  of  exactly  the  right  length  (8  and 4 digits,
       respectively), being a pair of hex digits for each byte in the address or port number when  expressed  in
       host  byte  order.   For  example, the port argument is the result of something like sprintf(arg,"%04X",sin.sin_port).  addr6-hex should be a string of 32 hex digits, being a pair for each byte in the address,
       in network byte order.

helper will exit with code 0 on success.

       If possible, helper will return an appropriate errno value as its exit status.  If this is  not  possible
       it may exit with status 255 or with an exit status corresponding to ENOSYS (Functionnotimplemented).

       authbind-helper - helper program to bind sockets to privileged ports without root

authbind(1), bind(2)

/usr/lib/authbind/helperaddr4-hexport-hex<socket/usr/lib/authbind/helperaddr6-hexport-hex6<socket