MPXCALL(2)          UNIX Programmer's Manual           MPXCALL(2)

NAME
     mpxcall - multiplexor and channel interface

SYNOPSIS
     mpxcall(arg1, arg2, arg3, cmd)

DESCRIPTION
     _M_p_x_c_a_l_l supplies a primitive interface to the kernel used by
     the routines listed below.  Each routine that uses _m_p_x_c_a_l_l
     passes an integer _c_m_d as the fourth argument.  These are
     defined in /_u_s_r/_i_n_c_l_u_d_e/_m_x._h. _M_p_x_c_a_l_l always returns an
     integer which is to be interpreted in accordance with the
     definition of _c_m_d.

SEE ALSO
     group(2), join(2), extract(2), connect(2), chan(2),
     attach(2), detach(2)

DIAGNOSTICS
     The value -1 is returned on error.

Printed 9/10/82                                                 1