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annotate cos/utils/makeinitrd.py @ 139:2ec4d4332b7a

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author Windel Bouwman
date Sat, 26 Jan 2013 19:44:36 +0100
parents 35cc54e078dd
children
rev   line source
32
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1 #!/usr/bin/python
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2
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3 # Script for generation of an initial ramdisk that contains
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4 # the first programs to run.
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5
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6 import struct
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7 import sys
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8
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9 if len(sys.argv) < 3:
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10 print('Usage: {0} output file1 [file2] ...'.format(sys.argv[0]))
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11 sys.exit(1)
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12
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13 outputfilename = sys.argv[1]
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14 inputFileNames = sys.argv[2:]
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15
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16 with open(outputfilename, 'wb') as outputFile:
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17 # Amount of files:
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18 outputFile.write(struct.pack('<I', 0x1337babe))
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19 outputFile.write(struct.pack('<I', len(inputFileNames)))
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20 for inputFileName in inputFileNames:
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21 # Magic:
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22 outputFile.write(struct.pack('<I', 0xcafebabe))
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23
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24 # Filename:
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25 fn = inputFileName.encode('ascii')
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26 outputFile.write(struct.pack('<I', len(fn)))
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27 outputFile.write(fn)
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29 # Data:
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30 with open(inputFileName, 'rb') as inputFile:
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31 data = inputFile.read()
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32 outputFile.write(struct.pack('<I', len(data)))
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33 outputFile.write(data)
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