mirror of
https://gitlab.com/kupfer/kupferbootstrap.git
synced 2025-02-23 05:35:44 -05:00
77 lines
2.5 KiB
Python
77 lines
2.5 KiB
Python
# modifed from pmbootstrap's binfmt.py, Copyright 2018 Oliver Smith, GPL-licensed
|
|
|
|
import os
|
|
import logging
|
|
import subprocess
|
|
|
|
from utils import mount
|
|
|
|
|
|
def binfmt_info():
|
|
# Parse the info file
|
|
full = {}
|
|
info = "/usr/lib/binfmt.d/qemu-static.conf"
|
|
logging.debug("parsing: " + info)
|
|
with open(info, "r") as handle:
|
|
for line in handle:
|
|
if line.startswith('#') or ":" not in line:
|
|
continue
|
|
splitted = line.split(":")
|
|
result = {
|
|
# _ = splitted[0] # empty
|
|
'name': splitted[1],
|
|
'type': splitted[2],
|
|
'offset': splitted[3],
|
|
'magic': splitted[4],
|
|
'mask': splitted[5],
|
|
'interpreter': splitted[6],
|
|
'flags': splitted[7],
|
|
'line': line,
|
|
}
|
|
if not result['name'].startswith('qemu-'):
|
|
logging.fatal(f'Unknown binfmt handler "{result["name"]}"')
|
|
logging.debug(f'binfmt line: {line}')
|
|
continue
|
|
arch = ''.join(result['name'].split('-')[1:])
|
|
full[arch] = result
|
|
|
|
return full
|
|
|
|
|
|
def is_registered(arch: str) -> bool:
|
|
return os.path.exists("/proc/sys/fs/binfmt_misc/qemu-" + arch)
|
|
|
|
|
|
def register(arch):
|
|
if is_registered(arch):
|
|
return
|
|
|
|
lines = binfmt_info()
|
|
|
|
# Build registration string
|
|
# https://en.wikipedia.org/wiki/Binfmt_misc
|
|
# :name:type:offset:magic:mask:interpreter:flags
|
|
info = lines[arch]
|
|
code = info['line']
|
|
binfmt = '/proc/sys/fs/binfmt_misc'
|
|
register = binfmt + '/register'
|
|
if not os.path.exists(register):
|
|
logging.info('mounting binfmt_misc')
|
|
result = mount('binfmt_misc', binfmt, options=[], fs_type='binfmt_misc')
|
|
if result.returncode != 0:
|
|
raise Exception(f'Failed mounting binfmt_misc to {binfmt}')
|
|
|
|
# Register in binfmt_misc
|
|
logging.info(f"Registering qemu binfmt ({arch})")
|
|
subprocess.run(["sh", "-c", 'echo "' + code + '" > ' + register + ' 2>/dev/null'])
|
|
if not is_registered(arch):
|
|
logging.debug(f'binfmt line: {code}')
|
|
raise Exception(f'Failed to register qemu-user for {arch} with binfmt_misc, {binfmt}/{info["name"]} not found')
|
|
|
|
|
|
def unregister(args, arch):
|
|
binfmt_file = "/proc/sys/fs/binfmt_misc/qemu-" + arch
|
|
if not os.path.exists(binfmt_file):
|
|
return
|
|
logging.info(f"Unregistering qemu binfmt ({arch})")
|
|
subprocess.run(["sh", "-c", "echo -1 > " + binfmt_file])
|