mirror of
https://gitlab.postmarketos.org/postmarketOS/pmbootstrap.git
synced 2025-07-13 11:29:46 +03:00
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.arch import Arch
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from pmb.core.chroot import Chroot
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from pmb.helpers import logging
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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.chroot.apk
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def is_registered(arch_qemu: str | Arch) -> bool:
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return os.path.exists(f"/proc/sys/fs/binfmt_misc/qemu-{arch_qemu}")
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def register(arch: Arch) -> None:
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"""
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Get arch, magic, mask.
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"""
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arch_qemu = arch.qemu()
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chroot = Chroot.native()
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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(chroot):
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pmb.chroot.init(chroot)
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pmb.chroot.apk.install(["qemu-" + arch_qemu], chroot)
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if is_registered(arch_qemu):
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return
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pmb.helpers.other.check_binfmt_misc()
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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, 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(["sh", "-c", 'echo "' + code + '" > ' + register])
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def unregister(arch: Arch) -> None:
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arch_qemu = arch.qemu()
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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(["sh", "-c", "echo -1 > " + binfmt_file])
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