FORK(3F)            UNIX Programmer's Manual             FORK(3F)

NAME
     fork - create a copy of this process

SYNOPSIS
     integer function fork()

DESCRIPTION
     _F_o_r_k creates a copy of the calling process.  The only dis-
     tinction between the two processes is that the value
     returned to one of them (referred to as the 'parent' pro-
     cess) will be the process id of the copy.  The copy is usu-
     ally referred to as the 'child' process.  The value returned
     to the 'child' process will be zero.

     All logical units open for writing are flushed before the
     fork to avoid duplication of the contents of I/O buffers in
     the external file(s).

     If the returned value is negative, it indicates an error and
     will be the negation of the system error code.  See
     perror(3F).

     A corresponding _e_x_e_c routine has not been provided because
     there is no satisfactory way to retain open logical units
     across the exec.  However, the usual function of _f_o_r_k/_e_x_e_c
     can be performed using _s_y_s_t_e_m(3F).

FILES
     /usr/lib/libU77.a

SEE ALSO
     fork(2), wait(3F), kill(3F), system(3F), perror(3F)

Printed 7/31/83                                                 1