NAME
fork - create a copy of this process
SYNOPSIS
integer*4 function fork()
DESCRIPTION
The fork function creates a copy of the calling process.
The only distinction between the two processes is that the
value returned to one of them, referred to as the 'parent'
process, is the process id of the copy. The copy is usually
referred to as the `child' process. The value returned to
the `child' process is 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 files.
If the returned value is negative, it indicates an error and
is the negation of the system error code. See perror(3F).
A corresponding exec routine has not been provided because
there is no satisfactory way to retain open logical units
across the exec. However, the usual function of fork/exec
can be performed using system(3F).
FILES
libfui.a
SEE ALSO
fork(2), wait(3F), kill(3F), system(3F), perror(3F)