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|
#!/bin/bash
#
# #BINDIR#/cryptfs: mount/umount encrypted partitions
#
set -e
if [ $# -eq 1 ] && [ "x$1" = 'x-u' ]; then
unmount=true
elif [ $# -eq 0 ]; then
unmount=false
else
>&2 printf 'Usage: %s [-u]\n' "$0"
exit 1
fi
give_all_parent_dirs() {
local odir
local dir
odir="$1"
odir="/${odir#/}"
dir="${odir%/*}"
while [ "${dir}" != '' ]; do
printf '%s %s\n' "${odir}" "${dir}"
dir="${dir%/*}"
done
}
inner_fs_to_mountorder() {
{
echo "${fstab}" | \
grep "^$1 " | \
awk '{print "x " $3}'
echo "${fstab}" | \
sed -n '
s|^\(\S\+\) \S\+ \(\S\+\)\( .*\)\?$|\1 \2|
T
p
' | \
while read -r order dir; do
give_all_parent_dirs "${dir}" | \
awk '{print "'"${order}"' " $1 " " $2}'
done | \
sort -k3,3 -k2r,2 | \
uniq -f2 | \
cut -d' ' -f1,3
} | \
sort -k2r,2 -k1,1 | \
uniq -f1 -d | \
cut -d' ' -f1
}
mountpoint_to_file() {
{
echo "${fstab}" | \
awk '{print $1 " " $3}'
give_all_parent_dirs "$1" | \
awk '{print "x " $2}'
} | \
sort -k2r,2 -k1,1 | \
uniq -f1 -d | \
cut -d' ' -f1 | \
head -n1
}
mountorder_to_device() {
{
printf 'x %s\n' "$1"
echo "${fstab}" | \
awk '{print $1 " " $2}' | \
sort -k2,2 -u
} | \
sort -k2,2 -k1,1 | \
uniq -f1 -d | \
cut -d' ' -f1
}
crypttab=$(
sed '
s|^\s*#CONF_PREFIXES#\s*||
/^\s*#/d
/^\s*$/d
s/\s\+/ /g
' '#ETCDIR#/crypttab' | \
sort -u | \
sed '
s|UUID=|#UUIDDIR#/|
s/\s\+/ /g
s/^ //
'
)
fstab=$(
sed '
s|^\s*#CONF_PREFIXES#\s*||
/^\s*#/d
/^\s*\S\+\s\+[^\/[:space:]]/d
/^\s*$/d
s/\s\+/ /g
' '#ETCDIR#/fstab' | \
sort -u | \
cat -n | \
sed '
s|UUID=|#UUIDDIR#/|
s/\s\+/ /g
s/^ //
s/ \+$//
'
)
mount_details() {
echo "${fstab}" | \
grep "^$2 " | \
while read -r _ source dest fs opts _; do
case "$1" in
'mp')
printf '%s\n' "${dest}"
;;
'dev')
printf '%s\n' "${source}"
;;
'fs')
printf '%s\n' "${fs}"
;;
'all')
printf -- '-t %s ' "${fs}"
if [ -n "${opts}" ] && \
[ "${opts}" != 'defaults' ]; then
printf -- '-o %s ' "${opts}"
fi
printf '%s %s\n' "${source}" "${dest}"
;;
*)
>&2 printf 'unknown mount_details "%s"\n' "$1"
exit 42
;;
esac
done
}
is_mounted() {
mountpoint -q "$(mount_details mp "$1")"
}
is_unlocked() {
cryptsetup status "$1" >/dev/null 2>&1
}
do_mount() {
local inner_fs
if is_mounted "$1"; then
return
fi
inner_fs=$(inner_fs_to_mountorder "$1")
case "$(mount_details fs "$1")" in
'ext'*)
e2fsck -p $(mount_details dev "$1")
;;
'fuse.sshfs'|'fuse.ftps')
local max_wait
local host
max_wait=$(($(date +%s)+120))
host=$(
mount_details dev "$1" | \
sed 's>^\([^:@]*@\)\?\([^:@]\+\):\S*$>\2>'
)
while [ $(date +%s) -lt ${max_wait} ] && \
! #PING6# -c1 "${host}" >/dev/null 2>&1 && \
! ping -c1 "${host}" >/dev/null 2>&1; do
>&2 printf ','
sleep 1
done
;;
esac
if [ -n "${inner_fs}" ]; then
do_unmount -l "${inner_fs}"
fi
mount $(mount_details all "$1")
if [ -n "${inner_fs}" ]; then
do_mount "${inner_fs}"
fi
}
do_unmount() {
local inner_fs
local lazy
if [ "x$1" = 'x-l' ]; then
lazy='-l'
shift
else
lazy=''
fi
if ! is_mounted "$1"; then
return
fi
inner_fs=$(inner_fs_to_mountorder "$1")
if [ -n "${inner_fs}" ]; then
do_unmount -l "${inner_fs}"
fi
umount ${lazy} $(mount_details mp "$1")
if [ -n "${inner_fs}" ]; then
do_mount "${inner_fs}"
fi
}
do_crypt_close() {
if is_unlocked "$1"; then
cryptsetup luksClose "$1"
fi
}
do_crypt_open() {
if ! is_unlocked "$1"; then
cryptsetup luksOpen "$2" "$1" --key-file="$3"
fi
}
echo "${crypttab}" | \
grep -vxF '' | \
while read -r name raw key; do
key="${key%% *}"
key_mount=$(mountpoint_to_file "${key}")
mount_order=$(mountorder_to_device "#MAPDIR#/${name}")
if ${unmount}; then
do_unmount "${mount_order}"
do_crypt_close "${name}"
else
do_mount "${key_mount}"
do_crypt_open "${name}" "${raw}" "${key}"
do_unmount -l "${key_mount}"
do_mount "${mount_order}"
fi
done
# End of file
|
