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#!/usr/bin/env python
import argparse
import re
import sys
def main():
argp = argparse.ArgumentParser()
argp.add_argument("infile", type=argparse.FileType("rb"), help="Input vmcore file")
argp.add_argument(
"outfile", type=argparse.FileType("wb"), help="Output vmcore file"
)
args = argp.parse_args()
inf = args.infile
outf = args.outfile
line_re = re.compile(r"^% RD: (\d+) (\d+)")
# copy the first chunk that usually includes ELF headers
# (not output by patched libfbsdvmcore since libelf reads this)
outf.write(inf.read(1024))
for l in sys.stdin:
m = line_re.match(l)
if m is None:
continue
offset, size = [int(x) for x in m.groups()]
inf.seek(offset)
outf.seek(offset)
outf.write(inf.read(size))
if __name__ == "__main__":
main()
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