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https://github.com/fosslinux/live-bootstrap.git
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5c88f1c87f
Now that we have the Linux Kernel built, we move to a full-disk (rather than initramfs) setup in sysc. However, we cannot assume the seed kernel has support for mounting hard drives. So, first we need to kexec into sysb, which is used as a jumping off point to create the hard drive for sysc. Additionally, since 2.6.16 does not have support for on-demand initramfs (initramfs must be built into kernel), we will have to rebuild the linux kernel within sysb without the initramfs. All of this process is not performed for chroot mode. Instead, we skip sysb and jump straight to sysc, copying over appropriate data. The python scripts have been changed slightly. Each sys* inherits SysGeneral, which contains various functions which are not specific to any sys* and simplifies those files. rootfs now also handles sysb and sysc. bootstrap.cfg also gives an indication whether we are running in a chroot to avoid attempting to kexec/mount within a chroot.
65 lines
1.8 KiB
Bash
Executable file
65 lines
1.8 KiB
Bash
Executable file
#!/usr/bin/bash
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# SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
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#
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# SPDX-License-Identifier: GPL-3.0-or-later
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set -e
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. bootstrap.cfg
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export PATH=/usr/bin:/usr/sbin
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# Unload the current kernel before things go weird
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kexec -u
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populate_device_nodes() {
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# http://www.linuxfromscratch.org/lfs/view/6.1/chapter06/devices.html
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test -c /dev/null || mknod -m 666 /dev/null c 1 3
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test -c /dev/zero || mknod -m 666 /dev/zero c 1 5
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test -c /dev/ptmx || mknod -m 666 /dev/ptmx c 5 2
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test -c /dev/tty || mknod -m 666 /dev/tty c 5 0
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test -c /dev/random || mknod -m 444 /dev/random c 1 8
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test -c /dev/urandom || mknod -m 444 /dev/urandom c 1 9
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}
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create_hdx() {
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# Create all of the hd{a,b,c..}
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minor=0
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alpha="a b c d e f g h i j k l m n o p" # 16 disks -- more than enough
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# For each disk...
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for a in ${alpha}; do
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mknod -m 600 "/dev/hd${a}" b 3 "$((minor++))"
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# For each partition...
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for p in $(seq 15); do
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mknod -m 600 "/dev/hd${a}${p}" b 3 "$((minor++))"
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done
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done
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}
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# If there is no disk specified error out
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if [ -z "${DISK}" ]; then
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echo "You must specify a disk where sysb will be located!"
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exit 1
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fi
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# Otherwise, add stuff from sysa to sysb
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echo "Mounting sysc"
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mkdir /sysc
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# All the various structures that don't exist but needed to mount
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mkdir -p /etc /dev
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populate_device_nodes
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create_hdx
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mount -t ext2 "/dev/${DISK}" /sysc
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# Copy over appropriate data
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echo "Copying data into sysc"
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cp -r /dev /sysc/
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# Don't include /usr/src
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find /usr -mindepth 1 -maxdepth 1 -type d -not -name src -exec cp -r {} /sysc/{} \;
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sync
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# switch_root into sysc 1. for simplicity 2. to avoid kexecing again
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# spouts a few errors because we don't have /proc /sys or /dev mounted
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echo "Switching into sysc"
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exec switch_root /sysc /init
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