Method to interact with cdrecord

burn_data.py

import subprocess

def burn_data(self,PATH):
        dir,file = (os.path.split(PATH))
        #unmount disc just in case (shouldn't be necessary for a blank disk)
        p0 = Popen(["umount","/media/CDROM"],stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        #wait for unmount
        p0.wait()
        #create the isofs raw image to write to cd
        p1 = Popen(["mkisofs","-R","-o","image.raw",PATH],stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        #wait for mkisofs to finish
        p1.wait()
        #burn isofs image to cd
        p2 = Popen(["cdrecord","-v","speed=2","image.raw"],stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        #while p2 is running poll will return None
        while p2.poll() is None:
            line = p2.stdout.readline()
            #This means that the cd was unwritable
            if (find(line, "Re-load disk and hit <CR>") != -1):
                p2.kill()
        #in case of success signal from poll is 0
        #otherwise we have an error
        burn_status = str(p2.poll())
        p3 = Popen(["eject"],stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        p3.wait()
        return burn_status