| 34,10 → 34,6 |
|---|
| import os |
| import struct |
| |
| def align_up(size, alignment): |
| "Align upwards to a given alignment" |
| return (((size) + ((alignment) - 1)) & ~((alignment) - 1)) |
| |
| def usage(prname): |
| "Print usage syntax" |
| print prname + " <ALIGNMENT> <PATH> <IMAGE>" |
| 76,40 → 72,22 |
|---|
| return payload_size |
| |
| def main(): |
| if (len(sys.argv) < 4): |
| if (len(sys.argv) < 3): |
| usage(sys.argv[0]) |
| return |
| |
| if (not sys.argv[1].isdigit()): |
| print "<ALIGNMENT> must be a number" |
| return |
| |
| align = int(sys.argv[1], 0) |
| path = os.path.abspath(sys.argv[2]) |
| path = os.path.abspath(sys.argv[1]) |
| if (not os.path.isdir(path)): |
| print "<PATH> must be a directory" |
| return |
| |
| header_size = align_up(18, align) |
| outf = file(sys.argv[3], "w") |
| outf.write(struct.pack("<" + ("%d" % header_size) + "x")) |
| outf = file(sys.argv[2], "w") |
| |
| outf.write(struct.pack("<5s", "TMPFS")) |
| payload_size = 5 |
| |
| payload_size += recursion(path, outf) |
| |
| recursion(path, outf) |
| outf.write(struct.pack("<BL", 0, 0)) |
| payload_size += 5 |
| |
| aligned_size = align_up(payload_size, align) |
| |
| if (aligned_size - payload_size > 0): |
| outf.write(struct.pack("<" + ("%d" % (aligned_size - payload_size)) + "x")) |
| |
| outf.close() |
| |
| outf.seek(0) |
| outf.write(struct.pack("<4sBBLQ", "HORD", 1, 1, header_size, aligned_size)) |
| outf.close() |
| |
| if __name__ == '__main__': |
| main() |