zfs/contrib/initramfs/hooks/zfsunlock.in
Cong Zhang e3392a5e7d Prompt user to unlock when login from dropbear
Update the zfsunlock initramfs hook to provide instructions on how
to unlock the root filesystem when appropriate.  The intent is to
make the dropbear ssh MOTD more user friendly.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Signed-off-by: Cong Zhang <13283869+congzhangzh@users.noreply.github.com>
Closes #17661
Closes #17662
2025-09-09 17:03:22 -07:00

20 lines
464 B
Bash

#!/bin/sh
if [ "$1" = "prereqs" ]; then
echo "dropbear"
exit
fi
. /usr/share/initramfs-tools/hook-functions
copy_exec /usr/share/initramfs-tools/zfsunlock /usr/bin/zfsunlock
if [ -f /etc/initramfs-tools/etc/motd ]; then
copy_file text /etc/initramfs-tools/etc/motd /etc/motd
else
tmpf=$(mktemp)
echo "If you use zfs encrypted root filesystems, you can use \`zfsunlock\` to manually unlock it" > "$tmpf"
copy_file text "$tmpf" /etc/motd
rm -f "$tmpf"
fi