class Lock:
def __init__(self, _file, shared=False):
lockfile = os.path.join(os.path.dirname(_file), ".%s" % os.path.basename(_file))
try:
self.lock = FileLock(_file)
self.lock.lock(timeout=TIMEOUT, shared=shared)
except IOError:
fail(FAIL_TIMEOUT)
def release(self):
self.lock.unlock()
class Lock:
def __init__(self, _file, shared=False):
lockfile = os.path.join(os.path.dirname(_file),
".%s" % os.path.basename(_file))
try:
self.lock = FileLock(_file)
self.lock.lock(timeout=TIMEOUT, shared=shared)
except IOError:
fail(FAIL_TIMEOUT)
def release(self):
self.lock.unlock()
class grubParser:
def __init__(self, _dir, write=False, timeout=-1):
self.dir = _dir
self.write = write
self.grub_conf = os.path.join(_dir, "grub.conf")
self.device_map = os.path.join(_dir, "device.map")
self.device_remap = os.path.join(_dir, "device.remap")
self.lock = FileLock("%s/.grub.lock" % _dir)
try:
self.lock.lock(write, timeout)
except IOError:
fail(FAIL_TIMEOUT)
# Fail if grub is not installed
if os.path.exists(self.grub_conf) and os.path.exists(self.device_map):
self.config = grubConf()
self.config.parseConf(self.grub_conf)
else:
self.fail(FAIL_NOGRUB)
# Get device map
mapped_devices = {}
for line in file(self.device_map):
try:
grub_device, linux_device = line.split("\t")
except ValueError:
self.fail(FAIL_NOGRUB)
mapped_devices[grub_device] = linux_device.strip()
# Remap devices if necessary
if not os.path.exists(self.device_remap):
remapped_devices = {}
for entry in self.config.entries:
commands = entry.listCommands()
if "root" in commands and "kernel" in commands:
grub_device = entry.getCommand("root").value
try:
grub_disk, grub_part, linux_disk, linux_part = parseGrubDevice(grub_device, remapped=False)
except TypeError:
self.fail(FAIL_NODEVICE % grub_device)
entry_version, entry_root = getKernelData(entry.getCommand("kernel"))
if entry_root:
if entry_root.startswith("LABEL="):
entry_root = getDeviceByLabel(entry_root.split("LABEL=")[1])
try:
linux_disk2, linux_part2, grub_disk2, grub_part2 = parseLinuxDevice(entry_root, remapped=False)
except:
self.fail(FAIL_NODEVICE % entry_root)
remapped_devices["(%s)" % grub_disk] = linux_disk2
grub_devices = mapped_devices.keys()
grub_devices.sort(key=lambda x: int(x[3:-1]))
linux_devices = []
for device in grub_devices:
linux_devices.append(mapped_devices[device])
if "(hd0)" in remapped_devices and remapped_devices["(hd0)"] != mapped_devices["(hd0)"]:
# Need remapping
linux_devices.remove(remapped_devices["(hd0)"])
linux_devices.insert(0, remapped_devices["(hd0)"])
list_map = []
for i in xrange(len(grub_devices)):
list_map.append("%s\t%s" % (grub_devices[i], linux_devices[i]))
file(self.device_remap, "w").write("\n".join(list_map))
def fail(self, msg):
self.lock.unlock()
fail(msg)
def release(self, save=True):
if save and self.write:
self.config.write(self.grub_conf)
self.lock.unlock()
class grubParser:
def __init__(self, _dir, write=False, timeout=-1):
self.dir = _dir
self.write = write
self.grub_conf = os.path.join(_dir, "grub.conf")
self.device_map = os.path.join(_dir, "device.map")
self.device_remap = os.path.join(_dir, "device.remap")
self.lock = FileLock("%s/.grub.lock" % _dir)
try:
self.lock.lock(write, timeout)
except IOError:
fail(FAIL_TIMEOUT)
# Fail if grub is not installed
if os.path.exists(self.grub_conf) and os.path.exists(self.device_map):
self.config = grubConf()
self.config.parseConf(self.grub_conf)
else:
self.fail(FAIL_NOGRUB)
# Get device map
mapped_devices = {}
for line in file(self.device_map):
try:
grub_device, linux_device = line.split("\t")
except ValueError:
self.fail(FAIL_NOGRUB)
mapped_devices[grub_device] = linux_device.strip()
# Remap devices if necessary
if not os.path.exists(self.device_remap):
remapped_devices = {}
for entry in self.config.entries:
commands = entry.listCommands()
if "root" in commands and "kernel" in commands:
grub_device = entry.getCommand("root").value
try:
grub_disk, grub_part, linux_disk, linux_part = parseGrubDevice(grub_device, remapped=False)
except TypeError:
self.fail(FAIL_NODEVICE % grub_device)
entry_version, entry_root = getKernelData(entry.getCommand("kernel"))
if entry_root:
if entry_root.startswith("LABEL="):
entry_root = getDeviceByLabel(entry_root.split("LABEL=")[1])
try:
linux_disk2, linux_part2, grub_disk2, grub_part2 = parseLinuxDevice(entry_root, remapped=False)
except:
self.fail(FAIL_NODEVICE % entry_root)
remapped_devices["(%s)" % grub_disk] = linux_disk2
grub_devices = mapped_devices.keys()
grub_devices.sort(key=lambda x: int(x[3:-1]))
linux_devices = []
for device in grub_devices:
linux_devices.append(mapped_devices[device])
if "(hd0)" in remapped_devices and remapped_devices["(hd0)"] != mapped_devices["(hd0)"]:
# Need remapping
linux_devices.remove(remapped_devices["(hd0)"])
linux_devices.insert(0, remapped_devices["(hd0)"])
list_map = []
for i in xrange(len(grub_devices)):
list_map.append("%s\t%s" % (grub_devices[i], linux_devices[i]))
file(self.device_remap, "w").write("\n".join(list_map))
def fail(self, msg):
self.lock.unlock()
fail(msg)
def release(self, save=True):
if save and self.write:
self.config.write(self.grub_conf)
self.lock.unlock()
