forked from Mirror/pmbootstrap
1d9bbd613e
We currently lazily initialize the chroot's on first use, plus a few bonus calls to init. However, there are some instances where we actually don't want the chroot to be initialised (mostly to break recursion loops). Simplify the codebase by removing all of this, and just calling pmb.chroot.init() where it's needed. In addition, print a warning if init() is called multiple times for one chroot. This should help us catch these instances if they crop up again. Signed-off-by: Caleb Connolly <caleb@postmarketos.org>
66 lines
2 KiB
Python
66 lines
2 KiB
Python
# Copyright 2023 Oliver Smith
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# SPDX-License-Identifier: GPL-3.0-or-later
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import os
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from pmb.core.chroot import Chroot
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from pmb.helpers import logging
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from pmb.core.types import PmbArgs
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import pmb.helpers.run
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import pmb.helpers.other
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import pmb.parse
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import pmb.parse.arch
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def is_registered(arch_qemu):
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return os.path.exists("/proc/sys/fs/binfmt_misc/qemu-" + arch_qemu)
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def register(args: PmbArgs, arch):
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"""
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Get arch, magic, mask.
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"""
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arch_qemu = pmb.parse.arch.alpine_to_qemu(arch)
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# always make sure the qemu-<arch> binary is installed, since registering
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# may happen outside of this method (e.g. by OS)
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if f"qemu-{arch_qemu}" not in pmb.chroot.apk.installed(args):
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pmb.chroot.apk.install(args, ["qemu-" + arch_qemu], Chroot.native())
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if is_registered(arch_qemu):
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return
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pmb.helpers.other.check_binfmt_misc(args)
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# Don't continue if the actions from check_binfmt_misc caused the OS to
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# automatically register the target arch
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if is_registered(arch_qemu):
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return
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info = pmb.parse.binfmt_info(arch_qemu)
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# Build registration string
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# https://en.wikipedia.org/wiki/Binfmt_misc
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# :name:type:offset:magic:mask:interpreter:flags
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name = "qemu-" + arch_qemu
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type = "M"
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offset = ""
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magic = info["magic"]
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mask = info["mask"]
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interpreter = "/usr/bin/qemu-" + arch_qemu + "-static"
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flags = "C"
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code = ":".join(["", name, type, offset, magic, mask, interpreter,
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flags])
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# Register in binfmt_misc
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logging.info("Register qemu binfmt (" + arch_qemu + ")")
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register = "/proc/sys/fs/binfmt_misc/register"
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pmb.helpers.run.root(
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args, ["sh", "-c", 'echo "' + code + '" > ' + register])
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def unregister(args: PmbArgs, arch):
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arch_qemu = pmb.parse.arch.alpine_to_qemu(arch)
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binfmt_file = "/proc/sys/fs/binfmt_misc/qemu-" + arch_qemu
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if not os.path.exists(binfmt_file):
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return
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logging.info("Unregister qemu binfmt (" + arch_qemu + ")")
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pmb.helpers.run.root(args, ["sh", "-c", "echo -1 > " + binfmt_file])
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