The TCP/IP address space operates as a transport provider for the
INET physical file system. For this to occur, the TCP/IP system address
space must connect to z/OS® UNIX and become a z/OS UNIX process.
Therefore, the started task UID that is assigned to the TCP/IP system
address space must have a valid OMVS segment.
As a transport provider,
the TCP/IP address space requires superuser privileges in z/OS UNIX.
Define the TCP/IP system address space started task UID as UID=0,
or define the TCP/IP system address space as a trusted environment
in the RACF® started class profile
for the TCP/IP system address space. Use the following command to
assign an OMVS segment to the TCP/IP started task user ID specified
as UID=0:
ALU tcpip_userid OMVS(UID(0) HOME(/) PGM(/bin/sh))