artiq/artiq/frontend/artiq_mkfs.py

48 lines
1.2 KiB
Python
Executable File

#!/usr/bin/env python3.5
import argparse
import struct
def get_argparser():
parser = argparse.ArgumentParser(description="ARTIQ flash storage image generator")
parser.add_argument("output", help="output file")
parser.add_argument("-s", nargs=2, action="append", default=[],
metavar=("KEY", "STRING"),
help="add string")
parser.add_argument("-f", nargs=2, action="append", default=[],
metavar=("KEY", "FILENAME"),
help="add file contents")
return parser
def write_record(f, key, value):
key_size = len(key) + 1
value_size = len(value)
record_size = key_size + value_size + 4
f.write(struct.pack(">l", record_size))
f.write(key.encode())
f.write(b"\x00")
f.write(value)
def write_end_marker(f):
f.write(b"\xff\xff\xff\xff")
def main():
args = get_argparser().parse_args()
with open(args.output, "wb") as fo:
for key, string in args.s:
write_record(fo, key, string.encode())
for key, filename in args.f:
with open(filename, "rb") as fi:
write_record(fo, key, fi.read())
write_end_marker(fo)
if __name__ == "__main__":
main()