import popen2
import os
+import os.path
import errno
import sys
import re
import signal
import time
+import array
class disk:
# Configurable values:
dvdrwmediainfo = "@DVDRWMEDIAINFO@"
growcmd = "@GROWISOFS@"
dvdrwformat = "@DVDRWFORMAT@"
+ dd = "@DD@"
margin = 10485760 # 10 mb security margin
# Comment the following line if you want the tray to be reloaded
processi = popen2.Popen4(cmd)
status = processi.wait()
if not os.WIFEXITED(status):
- raise DVDError(self.dvdrwmediainfo + " process did not exit correctly.")
+ raise DVDError(0, self.dvdrwmediainfo + " process did not exit correctly.")
if os.WEXITSTATUS(status) != 0:
- raise DVDError("Cannot get media info from " + self.dvdrwmediainfo)
+ raise DVDError(0, "Cannot get media info from " + self.dvdrwmediainfo)
return
result = processi.fromchild.read()
if mediatype:
self.disktype = mediatype.group(2)
else:
- raise DVDError("Media type not found in " + self.dvdrwmediainfo + " output")
+ raise DVDError(0, "Media type not found in " + self.dvdrwmediainfo + " output")
if self.disktype == "DVD-RW":
if mediamode:
self.diskmode = mediamode.group(1)
else:
- raise DVDError("Media mode not found for DVD-RW in " + self.dvdrwmediainfo + " output")
+ raise DVDError(0, "Media mode not found for DVD-RW in " + self.dvdrwmediainfo + " output")
if status:
self.diskstatus = status.group(1)
else:
- raise DVDError("Disc status not found in " + self.dvdrwmediainfo + " output")
+ raise DVDError(0, "Disc status not found in " + self.dvdrwmediainfo + " output")
self.mediumtype_collected = 1
if os.WEXITSTATUS(status) != 0:
raise DVDError(os.WEXITSTATUS(status), cmd + " exited with status " + str(os.WEXITSTATUS(status)) + ", signal/status " + str(status))
+ def prepare(self):
+ if not self.is_RW():
+ raise DVDError(0, "I won't prepare a non-rewritable medium")
+
+ # Blank DVD+RW when there is no data on it
+ if self.is_plus_RW() and self.is_blank():
+ print "DVD+RW looks brand-new, blank it to fix some DVD-writers bugs."
+ self.blank()
+ return # It has been completely blanked: Medium is ready to be used by Bacula
+
+ if self.is_minus_RW() and (not self.is_restricted_overwrite()):
+ print "DVD-RW is in " + self.diskmode + " mode, reformating it to Restricted Overwrite"
+ self.reformat_minus_RW()
+ return # Reformated: Medium is ready to be used by Bacula
+
+ # TODO: Check if /dev/fd/0 and /dev/zero exists, otherwise, run self.blank()
+ if not os.path.exists("/dev/fd/0") or not os.path.exists("/dev/zero"):
+ print "/dev/fd/0 or /dev/zero doesn't exist, blank the medium completely."
+ self.blank()
+ return
+
+ cmd = self.dd + " if=/dev/zero bs=1024 count=512 | " + self.growcmd + " -Z " + self.device + "=/dev/fd/0"
+ print "Running " + cmd
+ oldsig = signal.signal(signal.SIGTERM, self.term_handler)
+ proc = popen2.Popen4(cmd)
+ self.pid = proc.pid
+ status = proc.poll()
+ while status == -1:
+ line = proc.fromchild.readline()
+ while len(line) > 0:
+ print line,
+ line = proc.fromchild.readline()
+ time.sleep(1)
+ status = proc.poll()
+ self.pid = 0
+ print
+ signal.signal(signal.SIGTERM, oldsig)
+ if os.WEXITSTATUS(status) != 0:
+ raise DVDError(os.WEXITSTATUS(status), cmd + " exited with status " + str(os.WEXITSTATUS(status)) + ", signal/status " + str(status))
+
def blank(self):
cmd = self.growcmd + " -Z " + self.device + "=/dev/zero"
print "Running " + cmd
dvd-handler DEVICE test
dvd-handler DEVICE free
dvd-handler DEVICE write APPEND FILE
+dvd-handler DEVICE blank
where DEVICE is a device name like /dev/sr0 or /dev/dvd.
Operations:
-test Scan the device and report the information found.
+test Scan the device and report the information found.
This operation needs no further arguments.
-free Scan the device and report the available space.
-write Write a part file to disk.
+free Scan the device and report the available space.
+write Write a part file to disk.
This operation needs two additional arguments.
The first indicates to append (0) or restart the
disk (1). The second is the file to write.
+prepare Prepare a DVD+/-RW for being used by Bacula.
+ Note: This is only useful if you already have some
+ non-Bacula data on a medium, and you want to use
+ it with Bacula. Don't run this on blank media, it
+ is useless.
"""
sys.exit(1)
else:
print "Wrong number of arguments for free operation."
usage()
+elif "prepare" == sys.argv[2]:
+ if len(sys.argv) == 3:
+ try:
+ dvd.prepare()
+ except DVDError, e:
+ print "Error while preparing medium: ", str(e)
+ if e.errno != 0:
+ sys.exit(e.errno & 0x7F)
+ else:
+ sys.exit(errno.EPIPE)
+ else:
+ print "Medium prepared successfully."
+ else:
+ print "Wrong number of arguments for prepare operation."
+ usage()
elif "test" == sys.argv[2]:
try:
print str(dvd)
usage()
sys.exit(1)
else:
- print "No operation - use test, free or write."
+ print "No operation - use test, free, prepare or write."
print "THIS MIGHT BE A CASE OF DEBUGGING BACULA OR AN ERROR!"
sys.exit(0)
projects / bacula / bacula / blobdiff