Try creating daemon process in Julia

julia_daemon.jl

function daemon()
    cpid = ccall(:fork, Cint, ())

    if cpid != 0
        exit()
	else
        ccall(:setsid, Cint, ())
        cpid = ccall(:fork, Cint, ())
	    if cpid != 0
            exit()
	    else
            for idx in 1:1024
                ccall(:close, Int32, (Int32,), idx)
            end
            
    		fd = ccall(:open, Int32, (Ptr{Uint8}, Int32), "/dev/null", Base.FS.JL_O_RDWR)
    		ccall(:dup2, Int32, (Int32,Int32), fd, 1)
    		ccall(:dup2, Int32, (Int32,Int32), fd, 2)

    		while(true)
    			# using sleep kills the process???
    			# sleep(2)
                f = open("/tmp/forkchk.txt", "w")
    			println(f, time())
    			close(f)
    		end
        end
	end
end