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#
# rc.lib
#
# vim:filetype=sh
# shellcheck disable=1090
# Functions for rc.boot and rc.shutdown
out() { printf '\033[1;36m-> \033[m\033[1m%s\033[m\n' "$@" ;}
error() { printf '\033[1;31m!> ERROR: \033[m\033[1m%s\033[m\n' "$@" >&2 ;}
welcome() { printf '\033[1;36m->\033[m\033[1m Welcome to\033[35m %s\033[m\033[1m!\n' "Carbs $(uname -sr)" ;}
mnt() {
mountpoint -q "$1" || {
dir=$1
shift
mount "$@" "$dir"
}
}
emergency_shell() {
error "Cannot continue init due to errors above, starting emergency shell" \
"When ready, type 'exit' to continue the boot."
/bin/sh -l
}
parse_crypttab() {
# This is a pure shell crypttab parser which supports
# a subset of the format.
# Function by Dylan Araps
exec 3<&0
# shellcheck disable=2086
while read -r name dev pass opts err; do
# Skip comments.
[ "${name##\#*}" ] || continue
# Break on invalid crypttab (> 5 columns).
[ "$err" ] && break
# Turn 'UUID=*' lines into device names.
[ "${dev##UUID*}" ] || dev=$(blkid -l -o device -t "$dev")
# Parse options by turning the list into a pseudo array.
{ old_ifs=$IFS; IFS=,; set -f; set +f -- $opts; IFS=$old_ifs; }
# Create an argument list (no other way to do this in sh).
for opt; do case $opt in
discard) copts="$copts --allow-discards" ;;
readonly|read-only) copts="$copts -r" ;;
tries=*) copts="$copts -T ${opt##*=}" ;;
esac; done
# If password is 'none', '-' or empty ask for it.
case $pass in
none|-|"") cryptsetup luksOpen $copts "$dev" "$name" <&3 ;;
*) cryptsetup luksOpen $copts -d "$pass" "$dev" "$name" ;;
esac
done < /etc/crypttab
exec 3>&-
[ "$copts" ] && [ -x /bin/vgchange ] && {
out "Activating LVM devices for dm-crypt..."
vgchange --sysinit -a y || emergency_shell
}
}
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