patches and low-level development discussion

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
 #!/bin/execlineb -P
# SPDX-License-Identifier: EUPL-1.2+
# SPDX-FileCopyrightText: 2021 Alyssa Ross <hi@alyssa.is>

if -n {
  # If this is a Spectrum installer eosimages partition, we might be
  # booting from the installer, and should loopback mount the images.
  importas -i mdev MDEV
  if {
    backtick -E type { lsblk -lnpo PARTTYPE $mdev }
    test $type = 56a3bbc3-aefa-43d9-a64d-7b3fd59bbc4e
  }
  if {
    forx -pE module { ext4 loop }
    modprobe $module
  }
  backtick uuid { lsblk -lnpo PARTUUID $mdev }
  multisubstiute {
    define mdev_ $mdev
    importas -Si uuid
  }
  if { mkdir -p /mnt/${uuid} }
  if { mount $mdev_ /mnt/${uuid} }
  find /mnt/${uuid} -name *.img -exec
  losetup -Pf {}
  ;
}

# Check whether we now have all the partitions we need to boot.

importas -i version x-spectrum-version
backtick rootfs_dev { findfs PARTLABEL=Spectrum_OS_${version} }
backtick verity_dev { findfs PARTLABEL=Spectrum_OS_${version}.verity }
multisubstitute {
  importas -iS rootfs_dev
  importas -iS verity_dev
}

if { ln -s $rootfs_dev /dev/rootfs }
if { ln -s $verity_dev /dev/verity }

redirfd -w -nb 1 /dev/rootfs.poll echo