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Contents
module ReiserFSProbe
REISERFS_DISK_OFFSET_NEW = 64 * 1024
REISERFS_DISK_OFFSET_OLD = 8 * 1024
REISERFS_SUPER_SIZE = 204
REISERFS_MAGIC_OFFSET = 52
REISERFS_MAGIC_SIZE = 10
REISERFS_MAGIC1 = "ReIsErFs"
REISERFS_MAGIC2 = "ReIsEr2Fs"
REISERFS_MAGIC3 = "ReIsEr3Fs"
def self.probe(dobj)
return false unless dobj.kind_of?(MiqDisk)
return true if ReiserFSProbe.isMagic?(ReiserFSProbe.getMagic(dobj, REISERFS_DISK_OFFSET_NEW))
return true if ReiserFSProbe.isMagic?(ReiserFSProbe.getMagic(dobj, REISERFS_DISK_OFFSET_OLD))
# No ReiserFS.
false
end
def self.getMagic(dobj, offset)
# Assume ReiserFS - read superblock at desired offset.
dobj.seek(offset) # new disk start offset.
sb = dobj.read(REISERFS_SUPER_SIZE)
return nil if sb.nil?
return nil if sb.size < (REISERFS_MAGIC_OFFSET + REISERFS_MAGIC_SIZE - 1)
# Check magic at offset 52 for accepted ReiserFS identifiers.
magic = sb[REISERFS_MAGIC_OFFSET, REISERFS_MAGIC_SIZE].strip
end
def self.isMagic?(magic)
return true if magic == REISERFS_MAGIC1
return true if magic == REISERFS_MAGIC2
return true if magic == REISERFS_MAGIC3
false
end
end
Version data entries
14 entries across 14 versions & 1 rubygems