Added method is_debian_live() to identify Debian Live media and loop devices
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@ -248,6 +248,48 @@ class Blockdevice:
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else:
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else:
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return False
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return False
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def is_debian_live(self):
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"""is the device part of the Debian Live runtime
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"""
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##Debian Live ("iso" or "usb-hdd" versions) uses two block
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##devices as part of its runtime system. The raw boot media
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##(such as a usb key or cdrom) is mounted at /live_media,
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##and the root filesystem is mounted off of the live media
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##using /dev/loop0.
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deb_live_devs = []
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for line in file("/proc/mounts"):
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try:
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fields = line.split(" ")
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##We are looking for, for example:
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##/dev/hdc /live_media iso9660 ro 0 0
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##and
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##/dev/loop0 /filesystem.squashfs squashfs ro 0 0
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if (fields[1] == "/live_media" and
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fields[3] == "ro"):
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deb_live_devs.append(fields[0])
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elif (fields[1] == "/filesystem.squashfs" and
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fields[3] == "ro"):
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deb_live_devs.append(fields[0])
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except IndexError:
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pass
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##TODO:
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##Since the lines in /proc/mounts that affect deb_live_devs
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##don't change after startup, deb_live_devs could be cached here.
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##
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##Check whether any Debian Live devices refer to the
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##block device we were passed
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matched = False
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for dev in deb_live_devs:
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for node in self.__get_device_nodes():
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if (node == dev):
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matched = True
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##If no nodes of the block device match the Debian Live
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##devices, return False
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return matched
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def is_lvm_pv(self):
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def is_lvm_pv(self):
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"""return if the device is a physical volume of a LVM
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"""return if the device is a physical volume of a LVM
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