#!/usr/bin/env python3 """ A helper application used to start bootstrapping process. It has a few modes of operation, you can create initramfs with binary seeds and sources that you can boot into or alternatively you can run bootstap inside chroot. """ # SPDX-License-Identifier: GPL-3.0-or-later # SPDX-FileCopyrightText: 2022 Dor Askayo # SPDX-FileCopyrightText: 2021 Andrius Štikonas # SPDX-FileCopyrightText: 2021 Bastian Bittorf # SPDX-FileCopyrightText: 2021 Melg Eight # SPDX-FileCopyrightText: 2021-23 fosslinux import argparse import os from sysa import SysA from sysc import SysC from lib.utils import run from lib.sysgeneral import stage0_arch_map from lib.tmpdir import Tmpdir def create_configuration_file(args): """ Creates bootstrap.cfg file which would contain options used to customize bootstrap. """ config_path = os.path.join('sysa', 'bootstrap.cfg') with open(config_path, "w", encoding="utf_8") as config: config.write("FORCE_TIMESTAMPS=" + str(args.force_timestamps) + "\n") config.write("CHROOT=" + str(args.chroot or args.bwrap) + "\n") config.write("CHROOT_ONLY_SYSA=" + str(args.bwrap) + "\n") config.write("UPDATE_CHECKSUMS=" + str(args.update_checksums) + "\n") config.write("DISK=sda1\n") if (args.bare_metal or args.qemu) and not args.kernel: config.write("KERNEL_BOOTSTRAP=True\n") else: config.write("KERNEL_BOOTSTRAP=False\n") # pylint: disable=too-many-statements def main(): """ A few command line arguments to customize bootstrap. This function also creates SysA object which prepares directory structure with bootstrap seeds and all sources. """ parser = argparse.ArgumentParser() parser.add_argument("-a", "--arch", help="Bootstrap architecture", default="x86") parser.add_argument("-c", "--chroot", help="Run inside chroot", action="store_true") parser.add_argument("-bw", "--bwrap", help="Run inside a bwrap sandbox", action="store_true") parser.add_argument("-p", "--preserve", help="Do not remove temporary dir", action="store_true") parser.add_argument("-t", "--tmpdir", help="Temporary directory", default="tmp") parser.add_argument("--tmpfs", help="Use a tmpfs on tmpdir", action="store_true") parser.add_argument("--tmpfs-size", help="Size of the tmpfs", default="8G") parser.add_argument("--force-timestamps", help="Force all files timestamps to be 0 unix time", action="store_true") parser.add_argument("--update-checksums", help="Update checksum files.", action="store_true") parser.add_argument("--external-sources", help="Download sources externally from live-bootstrap.", action="store_true") parser.add_argument("--no-create-config", help="Do not automatically create config file", action="store_true") parser.add_argument("-r", "--repo", help="Path to prebuilt binary packages.", nargs=None) parser.add_argument("--early-preseed", help="Skip early stages of live-bootstrap.", nargs=None) # QEMU arguments parser.add_argument("-q", "--qemu", help="Use QEMU", action="store_true") parser.add_argument("-qc", "--qemu-cmd", help="QEMU command to run", default="qemu-system-x86_64") parser.add_argument("-qr", "--qemu-ram", help="Memory (in megabytes) allocated to QEMU VM", default=4096) parser.add_argument("-qk", "--kernel", help="Custom sysa kernel to use") parser.add_argument("-b", "--bare-metal", help="Build images for bare metal", action="store_true") args = parser.parse_args() # Mode validation def check_types(): count = 0 if args.qemu: count += 1 if args.chroot: count += 1 if args.bwrap: count += 1 if args.bare_metal: count += 1 return count if check_types() > 1: raise ValueError("No more than one of qemu, chroot, bwrap, bare metal" "may be used.") if check_types() == 0: raise ValueError("One of qemu, chroot, bwrap, or bare metal must be selected.") # Arch validation if args.arch != "x86": raise ValueError("Only x86 is supported at the moment.") # Tmp validation if args.bwrap and args.tmpfs: raise ValueError("tmpfs cannot be used with bwrap.") # bootstrap.cfg if args.bare_metal: args.no_create_config = True try: os.remove(os.path.join('sysa', 'bootstrap.cfg')) except FileNotFoundError: pass if not args.no_create_config: create_configuration_file(args) else: with open(os.path.join('sysa', 'bootstrap.cfg'), 'a', encoding='UTF-8'): pass # tmpdir tmpdir = Tmpdir(path=args.tmpdir, preserve=args.preserve) if args.tmpfs: tmpdir.tmpfs(size=args.tmpfs_size) # sys system_c = SysC(arch=args.arch, tmpdir=tmpdir, external_sources=args.external_sources) system_a = SysA(arch=args.arch, early_preseed=args.early_preseed, tmpdir=tmpdir, external_sources=args.external_sources, repo_path=args.repo) bootstrap(args, system_a, system_c, tmpdir) def bootstrap(args, system_a, system_c, tmpdir): """Kick off bootstrap process.""" print(f"Bootstrapping {args.arch} -- SysA") if args.chroot: find_chroot = """ import shutil print(shutil.which('chroot')) """ chroot_binary = run('sudo', 'python3', '-c', find_chroot, capture_output=True).stdout.decode().strip() system_c.prepare(create_disk_image=False) system_a.prepare(create_initramfs=False) arch = stage0_arch_map.get(args.arch, args.arch) init = os.path.join(os.sep, 'bootstrap-seeds', 'POSIX', arch, 'kaem-optional-seed') run('sudo', 'env', '-i', 'PATH=/bin', chroot_binary, system_a.tmp_dir, init) elif args.bwrap: system_c.prepare(create_disk_image=False) system_a.prepare(create_initramfs=False) arch = stage0_arch_map.get(args.arch, args.arch) init = os.path.join(os.sep, 'bootstrap-seeds', 'POSIX', arch, 'kaem-optional-seed') run('bwrap', '--unshare-user', '--uid', '0', '--gid', '0', '--unshare-net', '--clearenv', '--setenv', 'PATH', '/usr/bin', '--bind', system_a.tmp_dir, '/', '--dir', '/dev', '--dev-bind', '/dev/null', '/dev/null', '--dev-bind', '/dev/zero', '/dev/zero', '--dev-bind', '/dev/random', '/dev/random', '--dev-bind', '/dev/urandom', '/dev/urandom', init) run('bwrap', '--unshare-user', '--uid', '0', '--gid', '0', '--unshare-net' if args.external_sources else None, '--clearenv', '--setenv', 'PATH', '/usr/bin', '--bind', system_a.tmp_dir + "/sysc_image", '/', '--dir', '/dev', '--dev-bind', '/dev/null', '/dev/null', '--dev-bind', '/dev/zero', '/dev/zero', '--dev-bind', '/dev/random', '/dev/random', '--dev-bind', '/dev/urandom', '/dev/urandom', '--tmpfs', '/dev/shm', '--proc', '/proc', '--bind', '/sys', '/sys', '--tmpfs', '/tmp', '/init') elif args.bare_metal: if args.kernel: system_c.prepare(create_disk_image=True) system_a.prepare(create_initramfs=True) print("Please:") print(" 1. Take tmp/sysa/initramfs and your kernel, boot using this.") print(" 2. Take tmp/sysc/disk.img and put this on a writable storage medium.") else: system_a.prepare(create_initramfs=True, kernel_bootstrap=True) print("Please:") print(" 1. Take tmp/sysa/sysa.img and write it to a boot drive and then boot it.") else: if args.kernel: system_c.prepare(create_disk_image=True) system_a.prepare(create_initramfs=True) run(args.qemu_cmd, '-enable-kvm', '-m', str(args.qemu_ram) + 'M', '-no-reboot', '-hda', tmpdir.get_disk("sysc"), '-nic', 'user,ipv6=off,model=e1000', '-kernel', args.kernel, '-initrd', system_a.initramfs_path, '-nographic', '-append', 'console=ttyS0') else: system_a.prepare(create_initramfs=True, kernel_bootstrap=True) run(args.qemu_cmd, '-enable-kvm', '-m', "4G", '-no-reboot', '-drive', 'file=' + os.path.join(system_a.tmp_dir, 'sysa.img') + ',format=raw', '-machine', 'kernel-irqchip=split', '-nic', 'user,ipv6=off,model=e1000', '-nographic') if __name__ == "__main__": main()