mirror of
https://github.com/ruby/ruby.git
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88 lines
2.4 KiB
Ruby
88 lines
2.4 KiB
Ruby
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# -*- ruby -*-
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# Display a file name and stream names of a file with those size.
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require 'dl'
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require 'dl/import'
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module NTFS
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extend DL::Importable
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dlload "kernel32.dll"
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OPEN_EXISTING = 3
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GENERIC_READ = 0x80000000
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BACKUP_DATA = 0x00000001
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BACKUP_ALTERNATE_DATA = 0x00000004
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FILE_SHARE_READ = 0x00000001
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FILE_FLAG_BACKUP_SEMANTICS = 0x02000000
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typealias "LPSECURITY_ATTRIBUTES", "void*"
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extern "BOOL BackupRead(HANDLE, PBYTE, DWORD, PDWORD, BOOL, BOOL, PVOID)"
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extern "BOOL BackupSeek(HANDLE, DWORD, DWORD, PDWORD, PDWORD, PVOID)"
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extern "BOOL CloseHandle(HANDLE)"
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extern "HANDLE CreateFile(LPCSTR, DWORD, DWORD, LPSECURITY_ATTRIBUTES,
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DWORD, DWORD, HANDLE)"
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module_function
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def streams(filename)
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status = []
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h = createFile(filename,GENERIC_READ,FILE_SHARE_READ,nil,
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OPEN_EXISTING,FILE_FLAG_BACKUP_SEMANTICS,0)
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if( h != 0 )
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begin
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# allocate the memory for backup data used in backupRead().
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data = DL.malloc(DL.sizeof("L5"))
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data.struct!("LLLLL", :id, :attrs, :size_low, :size_high, :name_size)
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# allocate memories for references to long values used in backupRead().
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context = DL.malloc(DL.sizeof("L"))
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lval = DL.malloc(DL.sizeof("L"))
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while( backupRead(h, data, data.size, lval, false, false, context) )
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size = data[:size_low] + (data[:size_high] << (DL.sizeof("I") * 8))
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case data[:id]
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when BACKUP_ALTERNATE_DATA
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stream_name = DL.malloc(data[:name_size])
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backupRead(h, stream_name, stream_name.size,
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lval, false, false, context)
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name = stream_name[0, stream_name.size]
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name.tr!("\000","")
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if( name =~ /^:(.*?):.*$/ )
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status.push([$1,size])
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end
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when BACKUP_DATA
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status.push([nil,size])
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else
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raise(RuntimeError, "unknown data type #{data[:id]}.")
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end
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l1 = DL.malloc(DL.sizeof("L"))
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l2 = DL.malloc(DL.sizeof("L"))
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if( !backupSeek(h, data[:size_low], data[:size_high], l1, l2, context) )
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break
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end
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end
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ensure
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backupRead(h, nil, 0, lval, true, false, context)
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closeHandle(h)
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end
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return status
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else
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raise(RuntimeError, "can't open #{filename}.\n")
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end
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end
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end
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ARGV.each{|filename|
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if( File.exist?(filename) )
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NTFS.streams(filename).each{|name,size|
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if( name )
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print("#{filename}:#{name}\t#{size}bytes\n")
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else
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print("#{filename}\t#{size}bytes\n")
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end
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}
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end
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}
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