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d429c48d76
- We do not use latest 4.9.x because it relies on a new version of binutils, while older versions do not. (Note: we should be able to go a bit newer but I didn't bother testing >50 versions to figure this out). - We do not use newer kernel versions because they require one or more of (new perl, new binutils, new make, new gcc, new bison, new tar). - sysb and sysc are updated to use the SATA (libata) subsystem (aka sda) instead of IDE-emulating SATA subsystem (aka hda) which is now available to us. - While theoretically according to docs 4.9 should work OOTB with our version of binutils this is not the case, so we have to do a bit of (interesting) patching. But this does not break anything. - Thankfully serial support in 4.9 is not screwed over like it is in 2.6 so we can revert to that. - 4.9 has the linux-libre project at our disposal, instead of gNewSense. So we use this. Unfortunatley that takes forever because we have to use sed because our version of gawk is too old/buggy. :( I plan to introduce very shortly 1. parallelism 2. 'sysc snapshot' which will start from sysc to avoid this. I do not want to use linux-libre tarballs because they make modificiations directly from this script (aka not easily verifiable, use the source!) and this script allows for much greater flexibility. - We compile the initramfs ahead-of-build using the in-tree cpio generator instead of also building cpio to use less packages. We do NOT build the initramfs into the kernel like 2.6 (unsupported). - Oh and fix a kexec-tools checksum.
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 sd{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 ${alpha}; do
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mknod -m 600 "/dev/sd${a}" b 8 "$((minor++))"
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# For each partition...
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for p in $(seq 15); do
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mknod -m 600 "/dev/sd${a}${p}" b 8 "$((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 "${DISK}" ]; then
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echo "You must specify a disk where sysb will be located!"
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exit 1
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fi
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# Otherwise, add stuff from sysa to sysb
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echo "Mounting sysc"
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mkdir /sysc
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# All the various structures that don't exist but needed to mount
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mkdir -p /etc /dev
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populate_device_nodes
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create_hdx
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mount -t ext4 "/dev/${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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