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  1. #!/usr/bin/env python
  2. #
  3. # Copyright (c) 2008 Martin Decky
  4. # All rights reserved.
  5. #
  6. # Redistribution and use in source and binary forms, with or without
  7. # modification, are permitted provided that the following conditions
  8. # are met:
  9. #
  10. # - Redistributions of source code must retain the above copyright
  11. #   notice, this list of conditions and the following disclaimer.
  12. # - Redistributions in binary form must reproduce the above copyright
  13. #   notice, this list of conditions and the following disclaimer in the
  14. #   documentation and/or other materials provided with the distribution.
  15. # - The name of the author may not be used to endorse or promote products
  16. #   derived from this software without specific prior written permission.
  17. #
  18. # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19. # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20. # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21. # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22. # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23. # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24. # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25. # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26. # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27. # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28. #
  29. """
  30. TMPFS creator
  31. """
  32.  
  33. import sys
  34. import os
  35. import struct
  36.  
  37. def usage(prname):
  38.     "Print usage syntax"
  39.     print prname + " <ALIGNMENT> <PATH> <IMAGE>"
  40.  
  41. def recursion(root, outf):
  42.     "Recursive directory walk"
  43.    
  44.     payload_size = 0
  45.    
  46.     for name in os.listdir(root):
  47.         canon = os.path.join(root, name)
  48.        
  49.         if (os.path.isfile(canon)):
  50.             outf.write(struct.pack("<BL" + ("%d" % len(name)) + "s", 1, len(name), name))
  51.             payload_size += 5 + len(name)
  52.             size = os.path.getsize(canon)
  53.             rd = 0;
  54.             outf.write(struct.pack("<L", size))
  55.             payload_size += 4
  56.            
  57.             inf = file(canon, "r")
  58.             while (rd < size):
  59.                 data = inf.read(4096);
  60.                 outf.write(data)
  61.                 payload_size += len(data)
  62.                 rd += len(data)
  63.             inf.close()
  64.        
  65.         if (os.path.isdir(canon)):
  66.             outf.write(struct.pack("<BL" + ("%d" % len(name)) + "s", 2, len(name), name))
  67.             payload_size += 5 + len(name)
  68.             payload_size += recursion(canon, outf)
  69.             outf.write(struct.pack("<BL", 0, 0))
  70.             payload_size += 5
  71.    
  72.     return payload_size
  73.  
  74. def main():
  75.     if (len(sys.argv) < 3):
  76.         usage(sys.argv[0])
  77.         return
  78.    
  79.     path = os.path.abspath(sys.argv[1])
  80.     if (not os.path.isdir(path)):
  81.         print "<PATH> must be a directory"
  82.         return
  83.    
  84.     outf = file(sys.argv[2], "w")
  85.    
  86.     outf.write(struct.pack("<5s", "TMPFS"))
  87.     recursion(path, outf)
  88.     outf.write(struct.pack("<BL", 0, 0))
  89.  
  90.     outf.close()
  91.        
  92. if __name__ == '__main__':
  93.     main()
  94.