62 lines
2.6 KiB
Bash
62 lines
2.6 KiB
Bash
#!/bin/sh
|
|
# Keru live ISO init — jumps straight into the installer.
|
|
#
|
|
# The live ISO carries only the installer. On boot this script:
|
|
# 1. mounts the virtual filesystems
|
|
# 2. attaches the read-only installer root (squashfs, plain initramfs, or
|
|
# an unattached block device)
|
|
# 3. execs installer/install.sh on the console — so you boot, choose, and it
|
|
# crafts and installs the system. No shell prompt in the way.
|
|
# 4. if the installer exits (e.g. you declined to build), drops to an
|
|
# emergency shell instead of leaving you stranded.
|
|
#
|
|
# Ultra-minimal by design: /bin/sh is busybox. No init system in the live env.
|
|
|
|
# ---- console -----------------------------------------------------------
|
|
# Redirect the console early so messages land where you can see them.
|
|
CONSOLE="${console:-/dev/tty1}"
|
|
exec <"$CONSOLE" >"$CONSOLE" 2>"$CONSOLE"
|
|
|
|
# ---- virtual filesystems ----------------------------------------------
|
|
mount -t proc proc /proc 2>/dev/null
|
|
mount -t sysfs sys /sys 2>/dev/null
|
|
mount -t devtmpfs dev /dev 2>/dev/null || (mkdir -p /dev && mount -t tmpfs dev /dev 2>/dev/null)
|
|
mkdir -p /dev/pts /dev/shm
|
|
mount -t devpts devpts /dev/pts 2>/dev/null
|
|
mount -t tmpfs tmpfs /dev/shm 2>/dev/null
|
|
|
|
# ---- locate the installer root ----------------------------------------
|
|
# Where the installer payload lives. Tried in order:
|
|
# 1. $root — whatever the kernel booted (a squashfs / overlay already handled
|
|
# by an initramfs that then hands off here).
|
|
# 2. a squashfs node named *.sfs on a known device (label=KERU).
|
|
# 3. nothing — the installer is already on the root we're running from.
|
|
case "${root:-}" in
|
|
/dev/*)
|
|
# re-mount as the boot-time root: cannot pivot here, so use it directly
|
|
/bin/busybox mount -o move / "$root" 2>/dev/null || true
|
|
;;
|
|
'')
|
|
for _dev in /dev/disk/by-label/KERU*; do
|
|
[ -e "$_dev" ] || continue
|
|
_node="$(readlink -f "$_dev")"
|
|
mount "$_node" /squash 2>/dev/null || continue
|
|
INSTALLER=/squash
|
|
break
|
|
done
|
|
;;
|
|
esac
|
|
INSTALLER="${INSTALLER:-/}"
|
|
|
|
# ---- launch the installer ---------------------------------------------
|
|
if [ -e "$INSTALLER/installer/install.sh" ]; then
|
|
printf '\n[ keru ] booting installer...\n'
|
|
cd "$INSTALLER" && exec /bin/sh "$INSTALLER/installer/install.sh"
|
|
fi
|
|
|
|
# If we land here the installer is missing or returned. Never strand someone:
|
|
# fall back to an interactive rescue shell.
|
|
printf '\n[ keru ] installer not found or exited.\n'
|
|
printf '[ keru ] dropping to an emergency shell. (installer path: %s)\n' "$INSTALLER"
|
|
exec /bin/sh
|