Llewellyn/Tomb
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bind hooks

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a file bind-hook in the tomb's root indicated directories to be
mount -o bind when the tomb is opened. tomb close manages to umount them
This commit is contained in:
Jaromil 2011-02-07 09:42:50 +01:00
parent 0dab10f26c
commit e6db14dcfc
1 changed files with 36 additions and 9 deletions
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45
src/tomb
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@ -193,12 +193,6 @@ exec_as_user() {
fi
func "executing as user '$SUDO_USER': ${(f)@}"
# which gksu > /dev/null
# if [ $? = 0 ]; then
# func "Using gksu for execution of '${(f)@}' as user $SUDO_USER"
# gksu -u $SUDO_USER "${@[@]}"
# return $?
# fi
which sudo > /dev/null
if [ $? = 0 ]; then
func "Using sudo for execution of '${(f)@}' as user $SUDO_USER"
@ -587,10 +581,31 @@ mount_tomb() {
chown $(id -u $ME):$(id -g $ME) ${tombmount}
notice "encrypted storage $tombfile succesfully mounted on $tombmount"
exec_bind_hooks ${tombmount}
exec_as_user tomb-status ${mapper} ${tombfile} ${tombmount} &!
return 0
}
exec_bind_hooks() {
mnt=$1 # first argument is where the tomb is mounted
if ! [ -r ${mnt}/bind-hooks ]; then return; fi
# if 'bind-hooks' is found inside the tomb, parse it
# every line contains two strings:
# the first is a directory existing inside the tomb
# the second is the place where it should be mounted (-o bind)
hook=`cat ${mnt}/bind-hooks | awk '
/^#/ { next }
{ if($1 && $2) print "mount -o bind \${mnt}/" $1 " " $2 "; " }
'`
# restore $HOME for the calling user
HOME=/home/${SUDO_USER}
act "bind hooks found, mounting direcories as requested"
# execute the mount commands
eval $hook
}
umount_tomb() {
if ! [ $1 ]; then
@ -601,7 +616,6 @@ umount_tomb() {
return 1
elif [ "$how_many_tombs" = "1" ]; then
mapper=`find /dev/mapper -name 'tomb.*'`
tombfile=`mount | grep $mapper | awk '{print $3}'`
else
error "too many tombs mounted, please specify which to unmount:"
ls /dev/mapper/tomb.*
@ -630,15 +644,28 @@ umount_tomb() {
else
error "tomb not found: $1"
error "please specify an existing /dev/mapper/tomb.*"
tomb-notify "My tomb vanished" "Crypto undertaker will rest in peace."
tomb-notify "Tomb was already closed." "Undertaker will rest in peace."
return 0
fi
basemap=`basename $mapper`
tombname=`echo ${basemap} | cut -d. -f2`
tombmount=`mount | grep $mapper | awk '{print $3}'`
# check if there are binded dirs and close them first
mount | grep "${tombmount}" | grep -v loop 2>&1 > /dev/null
if [ $? = 0 ]; then
act "closing tomb $tombname binded directories"
unbind=`mount | grep ${tombmount} | grep -v loop | awk '
{ print "umount " $3 "; " }
'`
eval $unbind
func "umount binded dirs:"
func "$unbind"
fi
act "closing tomb $tombname on dm-crypt $basemap"
mount | grep $mapper 2>&1 >/dev/null
if [ $? = 0 ]; then # still mounted
errno=`umount ${mapper}`