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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. import xstruct
  37.  
  38. HEADER = xstruct.convert("little: char[5]")
  39. DENTRY = xstruct.convert("little: uint8_t uint32_t")
  40. SIZE = xstruct.convert("little: uint32_t")
  41.  
  42. DENTRY_NONE = 0
  43. DENTRY_FILE = 1
  44. DENTRY_DIRECTORY = 2
  45.  
  46. def usage(prname):
  47.     "Print usage syntax"
  48.     print prname + " <PATH> <IMAGE>"
  49.  
  50. def recursion(root, outf):
  51.     "Recursive directory walk"
  52.    
  53.     for name in os.listdir(root):
  54.         canon = os.path.join(root, name)
  55.        
  56.         if (os.path.isfile(canon)):
  57.             outf.write(struct.pack(DENTRY, DENTRY_FILE, len(name)))
  58.             outf.write(xstruct.little_string(name))
  59.             size = os.path.getsize(canon)
  60.             rd = 0;
  61.             outf.write(struct.pack(SIZE, size))
  62.            
  63.             inf = file(canon, "r")
  64.             while (rd < size):
  65.                 data = inf.read(4096);
  66.                 outf.write(data)
  67.                 rd += len(data)
  68.             inf.close()
  69.        
  70.         if (os.path.isdir(canon)):
  71.             outf.write(struct.pack(DENTRY, DENTRY_DIRECTORY, len(name)))
  72.             outf.write(xstruct.little_string(name))
  73.             recursion(canon, outf)
  74.             outf.write(struct.pack(DENTRY, DENTRY_NONE, 0))
  75.  
  76. def main():
  77.     if (len(sys.argv) < 3):
  78.         usage(sys.argv[0])
  79.         return
  80.    
  81.     path = os.path.abspath(sys.argv[1])
  82.     if (not os.path.isdir(path)):
  83.         print "<PATH> must be a directory"
  84.         return
  85.    
  86.     outf = file(sys.argv[2], "w")
  87.    
  88.     outf.write(struct.pack(HEADER, "TMPFS"))
  89.     recursion(path, outf)
  90.     outf.write(struct.pack(DENTRY, DENTRY_NONE, 0))
  91.  
  92.     outf.close()
  93.        
  94. if __name__ == '__main__':
  95.     main()
  96.