#!/bin/zsh

VERSION=1.3
DATE="May/2013"
TOMBEXEC=$0
TOMBOPENEXEC="${TOMBEXEC}-open"
typeset -a OLDARGS
for arg in ${argv}; do OLDARGS+=($arg); done
DD="dd"
WIPE="rm -f"
MKFS="mkfs.ext3 -q -F -j -L"
STEGHIDE=1
MKTEMP=1
RESIZER=1
MOUNTOPTS="rw,noatime,nodev"

typeset -A global_opts
typeset -A opts
typeset -h username

typeset -h _uid
typeset -h _gid
typeset -h _tty

PATH=/sbin:/bin:/usr/sbin:/usr/bin
[[ "$TOMBEXEC" =~ "^/usr/local" ]] && PATH="/usr/local/bin:/usr/local/sbin:$PATH"

option_is_set() {
    #First argument, the option (something like "-s")
    #Second (optional) argument: if it's "out", command will print it out 'set'/'unset'

    #Return 0 if is set, 1 otherwise
    [[ -n ${(k)opts[$1]} ]];
    r=$?
    if [[ $2 == out ]]; then
	if [[ $r == 0 ]]; then
	    echo 'set'
	else
	    echo 'unset'
	fi
    fi
    return $r;
}

option_value() {
    #First argument, the option (something like "-s")
    <<< ${opts[$1]}
}

function _msg() {
    local command="print -P"
    local progname="$fg[magenta]${TOMBEXEC##*/}$reset_color"
    local message="$fg_bold[normal]$fg_no_bold[normal]${2}$reset_color"
    local -i returncode

    case "$1" in
	inline)
	    command+=" -n"; pchars=" > "; pcolor="yellow"
	    ;;
	message)
	    pchars=" . "; pcolor="white"; message="$fg_no_bold[$pcolor]${2}$reset_color"
	    ;;
	verbose)
	    pchars="[D]"; pcolor="blue"
	    ;;
	success)
	    pchars="(*)"; pcolor="green"; message="$fg_no_bold[$pcolor]${2}$reset_color"
	    ;;
	warning)
	    pchars="[W]"; pcolor="yellow"; message="$fg_no_bold[$pcolor]${2}$reset_color"
	    ;;
	failure)
	    pchars="[E]"; pcolor="red"; message="$fg_no_bold[$pcolor]${2}$reset_color"
	    returncode=1
	    ;;
	*)
	    pchars="[F]"; pcolor="red"
	    message="Developer oops!  Usage: _msg MESSAGE_TYPE \"MESSAGE_CONTENT\""
	    returncode=127
	    ;;
    esac
    ${=command} "${progname} $fg_bold[$pcolor]$pchars$reset_color ${message}$color[reset_color]" >&2
    return $returncode
}
function _message say()
{
    local notice="message"
    [[ "$1" = "-n" ]] && shift && notice="inline"
    option_is_set -q || _msg "$notice" "$1"
    return 0
}
alias act="_message -n"
function _verbose xxx()
{
    option_is_set -D && _msg verbose "$1"
    return 0
}
function _success yes()
{
    option_is_set -q || _msg success "$1"
    return 0
}
function _warning  no()
{
    option_is_set -q || _msg warning "$1"
    return 1
}
function _failure die()
{
    typeset -i exitcode=${2:-1}
    option_is_set -q || _msg failure "$1"
    exit $exitcode
}
progress() {

    if ! option_is_set --batch; then
	return
    fi
    print "[m][P][$1][$2][$3]" >&2

}

check_bin() {

    for req in cryptsetup pinentry sudo gpg; do
	command -v $req >/dev/null || die "Cannot find $req. It's a requirement to use Tomb, please install it." 1
    done

    export PATH=/sbin:/usr/sbin:$PATH

    command -v dcfldd > /dev/null
    { test $? = 0 } && { DD="dcfldd statusinterval=1" }

    command -v wipe > /dev/null && WIPE="wipe -f -s" || WIPE="rm -f"

    command -v mkfs.ext4 > /dev/null && \
	MKFS="mkfs.ext4 -q -F -j -L" || \
	MKFS="mkfs.ext3 -q -F -j -L"

    command -v mktemp > /dev/null || MKTEMP=0

    command -v steghide > /dev/null || STEGHIDE=0

    command -v e2fsck resize2fs > /dev/null || RESIZER=0

    if which tomb-kdf-pbkdf2 &> /dev/null; then
	KDF_PBKDF2="tomb-kdf-pbkdf2"
    else
	local our_pbkdf2
	our_pbkdf2="$(dirname $(readlink -f $TOMBEXEC))/kdf/tomb-kdf-pbkdf2"
	if which $our_pbkdf2 &> /dev/null; then
	    KDF_PBKDF2=$our_pbkdf2
	else
	    KDF_PBKDF2=
	fi
    fi

}

_have_shm() {

    xxx "_have_shm 0 We need only 1 MB of RAM"
    [[ -k /dev/shm ]] || return 1

    local -i SHM RAM

    SHM=$(df -k -B 4K -a -t tmpfs /dev/shm | awk '/\/dev\/shm/ { print $4; }')
    (( $? )) && return 1
    xxx "_have_shm 1 SHM $SHM KB are available"

    RAM=$(awk '/MemFree/ { print $2 }' /proc/meminfo)
    xxx "_have_shm 2 RAM $RAM KB are free"
    (( $RAM >= 1024 )) && return 0

    xxx "_have_shm 3 RAM $RAM KB left only :("

    return 1
}

safe_dir() {

    local -i tries
    while (( $tries < 3 )) ; do
	tries+=1
	if _have_shm; then
	    xxx "safe_dir creating directory in RAM"
	    if (( $MKTEMP )); then
		mktemp -d /dev/shm/$1.$$.XXXXXXX
	    else
		dir="/dev/shm/$1.$$.$RANDOM$RANDOM"
		mkdir -m 0700 -p "$dir"
		print "$dir"
	    fi
	    return 0
	else
	    _warning "WARNING: we cannot ensure we're running in RAM."
		 xxx "Wait a bit before retrying... (attempt $tries)"
	    sync && sleep 0.5
	fi
    done
    _warning "WARNING: no RAM available for me to run safely."
    return 1
}

safe_filename() {
    _have_shm || die "No access to shared memory on this system, sorry."
    (( $MKTEMP )) && \
	mktemp -u /dev/shm/$1.$$.XXXXXXX || \
	print "/dev/shm/$1.$$.$RANDOM$RANDOM"
}

check_swap() {

    local swaps=$(awk '/partition/ { print $1 }' /proc/swaps 2>/dev/null)
    [[ -z "$swaps" ]] && return 0                # No swap partition is active
    no  "An active swap partition is detected, this poses security risks."
    no  "You can deactivate all swap partitions using the command:"
    no  " swapoff -a"
    no  "But if you want to proceed like this, use the -f (force) flag."
    die "Operation aborted."
}

ask_password() {

    if [ -r /usr/local/share/themes/tomb/gtk-2.0-key/gtkrc ]; then
	GTK2_RC=/usr/local/share/themes/tomb/gtk-2.0-key/gtkrc
    elif [ -r /usr/share/themes/tomb/gtk-2.0-key/gtkrc ]; then
	GTK2_RC=/usr/share/themes/tomb/gtk-2.0-key/gtkrc
    fi

    title="Insert tomb password"
    if [ $2 ]; then title="$2"; fi

    output=`cat <<EOF | GTK2_RC_FILES=${GTK2_RC} pinentry 2>/dev/null | tail -n +7
OPTION ttyname=$TTY
OPTION lc-ctype=$LANG
SETTITLE $title
SETDESC $1
SETPROMPT Password:
GETPIN
EOF`
    if [[ `tail -n1 <<<$output` =~ ERR ]]; then
	return 1
    fi
    head -n1 <<<$output | awk '/^D / { sub(/^D /, ""); print }'
    return 0
}

exec_as_user() {
    if ! [ $SUDO_USER ]; then
	exec $@[@]
	return $?
    fi

    xxx "exec_as_user '$SUDO_USER': ${(f)@}"
    sudo -u $SUDO_USER "${@[@]}"
    return $?
}

check_priv() {

    username=$USER
    if [ $UID != 0 ]; then
	xxx "Using sudo for root execution of 'tomb ${(f)OLDARGS}'"

	sudok=false

	if ! option_is_set --sudo-pwd; then
	    if [ $? != 0 ]; then # if not then ask a password
		cat <<EOF | pinentry 2>/dev/null | awk '/^D / { sub(/^D /, ""); print }' | sudo -S -v
OPTION ttyname=$TTY
OPTION lc-ctype=$LANG
SETTITLE Super user privileges required
SETDESC Sudo execution of Tomb ${OLDARGS[@]}
SETPROMPT Insert your USER password:
GETPIN
EOF
	    fi
	else
	    _verbose "Escalating privileges using sudo-pwd"
	    sudo -S -v <<<`option_value --sudo-pwd`
	fi
	sudo "${TOMBEXEC}" -U ${UID} -G ${GID} -T ${TTY} "${(@)OLDARGS}"
	exit $?
    fi # are we root already

    modprobe dm_mod
    modprobe dm_crypt

    return 0
}

check_command() {
    #generic checks; useful for interaction, to check if there are problems
    #before wasting user's time

    if ! option_is_set --ignore-swap && ! option_is_set -f; then
	if ! check_swap; then
	    error "Swap activated. Disable it with swapoff, or use --ignore-swap"
	    exit 1
	fi
    fi
}

usage() {
    cat <<EOF

Syntax: tomb [options] command [file] [place]

Commands:

 dig     create a new empty TOMB file of --size in MB
 forge   create a new KEY file and set its password
 lock    installs a lock on a TOMB to use it with KEY

 open    open an existing TOMB

 index   update the search indexes of tombs
 search  looks for filenames matching text patterns

 list    list open TOMBs

 close   close a TOMB (or all)
 slam    slam a TOMB killing all programs using it

 passwd  change the password of a KEY
EOF
    if [ "$RESIZER" = 1 ]; then
	cat <<EOF
	resize  resize a TOMB to a new --size (can only grow)
EOF
    fi
    if [ "$STEGHIDE" = 1 ]; then
	cat <<EOF
 bury       hide a KEY inside a JPEG image
 exhume     extract a KEY from a JPEG image
EOF
    fi
    cat <<EOF

Options:

 -s     size of the tomb file when creating/resizing one (in MB)
 -k     path to the key to use for opening a tomb
 -n     don't process the hooks found in tomb
 -o     mount options used to open (default: rw,noatime,nodev)
 -f     force operation (i.e. even if swap is active)

 -h     print this help
 -v     print version, license and list of available ciphers
 -q     run quietly without printing informations
 -D     print debugging information at runtime

For more informations on Tomb read the manual: man tomb
Please report bugs on <http://github.com/dyne/tomb/issues>.
EOF
}

generate_translatable_strings() {
    cat <<EOF
# DIVIDER
#, fuzzy
msgid ""
msgstr ""
"Project-Id-Version: Tomb $VERSION\n"
"PO-Revision-Date: `date`\n"
"Last-Translator: Denis Roio <jaromil@dyne.org>\n"
"Language-Team: Tomb developers <crypto@lists.dyne.org>\n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=CHARSET\n"
"Content-Transfer-Encoding: 8bit\n"

# DIVIDER
#: commandline help
# DIVIDER

msgid ""
EOF

    usage | awk '
{ print "\"" $0 "\"" }'
    cat <<EOF
msgstr ""

# DIVIDER

EOF

    cat $TOMBEXEC | awk '
/(_verbose|xxx) ".*"$/ { sub( /^(_verbose|xxx)/ , "");
		 print "#: _verbose"; print "msgid " $0; print "msgstr \"\"\n" }

/(_success|yes) ".*"$/ { sub( /^(_success|yes)/ , "");
		 print "#: _success"; print "msgid " $0; print "msgstr \"\"\n" }

/(_warning|no) ".*"$/ { sub( /^(_warning|no)/ , "");
		 print "#: _warning"; print "msgid " $0; print "msgstr \"\"\n" }

/(_failure|die) ".*"$/ { sub( /^(_failure|die)/ , "");
		 print "#: _failure"; print "msgid " $0; print "msgstr \"\"\n" }

/(_message|say) ".*"$/ { sub( /^(_message|say)/ , "");
	      print "#: _message"; print "msgid " $0; print "msgstr \"\"\n" }

/(_message -n|act) ".*"$/ { sub( /^(_message -n|act)/ , "");
	      print "#: _message -n"; print "msgid " $0; print "msgstr \"\"\n" }
'
}

encode_key() {
    tombkey=$1
    imagefile=$2

    file $tombkey | grep PGP > /dev/null
    if [ $? != 0 ]; then
	_warning "encode failed: $tombkey is not a tomb key"
	return 1
    fi
    file $imagefile | grep JPEG > /dev/null
    if [ $? != 0 ]; then
	_warning "encode failed: $imagefile is not a jpeg image"
	return 1
    fi

    _success "Encoding key $tombkey inside image $imagefile"
    _message "please choose a password for the encoding"

    for c in 1 2 3; do

	tombpass=`exec_as_user ${TOMBEXEC} askpass "Steg password for ${tombkey}"`
	tombpasstmp=$tombpass
	tombpass=`exec_as_user ${TOMBEXEC} askpass "Steg password for ${tombkey} (again)"`
	if [ "$tombpasstmp" = "$tombpass" ]; then
	    break;
	fi
	unset tombpasstmp
	unset tombpass
    done

    if [ -z $tombpass ]; then
	_warning "passwords don't match, aborting operation."
	return 1
    fi

    awk '
/^-----/ {next}
/^Version/ {next}
{print $0}' ${tombkey} \
    | steghide embed --embedfile - --coverfile ${imagefile} \
    -p ${tombpass} -z 9 -e serpent cbc
    if [ $? != 0 ]; then
	_warning "encoding error: steghide reports problems"
	res=1
    else
	_success "tomb key encoded succesfully into image ${imagefile}"
	res=0
    fi

    unset tombpass

    return $res
}

decode_key() {
    tombname=$1
    imagefile=$2
    res=1

    file $imagefile | grep JPEG > /dev/null
    if [ $? != 0 ]; then
	_warning "encode failed: $imagefile is not a jpeg image"
	return 1
    fi

    keyfile=${tombname%%\.*}.tomb.key
    if [[ -e "$keyfile" ]]; then
	_warning "Key file $keyfile already exist."
	return 1
    fi
    _message "Trying to exhume a key out of image $imagefile"
    for c in 1 2 3; do
	if [ $c = 1 ]; then
	    tombpass=`exec_as_user ${TOMBEXEC} askpass "Steg password for ${keyfile}"`
	else
	    tombpass=`exec_as_user ${TOMBEXEC} askpass "Steg password for $keyfile (retry $c)"`
	fi
	steghide extract -sf ${imagefile} -p ${tombpass} -xf - \
	    | awk '
BEGIN {
print "-----BEGIN PGP MESSAGE-----"
}
{ print $0 }
END {
print "-----END PGP MESSAGE-----"
}' > ${keyfile}

	if [ "`cat ${keyfile} | wc -l`" != "3" ]; then
	    _success "${keyfile} succesfully decoded"
	    res=0
	    break;
	fi
    done

    unset tombpass

    if [ $res != 0 ]; then
	_warning "nothing found."
    fi

    return $res
}

list_gnupg_ciphers() {

    which gpg > /dev/null || die "gpg (GnuPG) is not found, Tomb cannot function without it."

    ciphers=(`gpg --version | awk '
BEGIN { ciphers=0 }
/^Cipher:/ { gsub(/,/,""); sub(/^Cipher:/,""); print; ciphers=1; next }
/^Hash:/ { ciphers=0 }
{ if(ciphers==0) { next } else { gsub(/,/,""); print; } }
'`)
    echo " ${ciphers}"
    return 1
}

exec_safe_bind_hooks() {
    if [[ -n ${(k)opts[-o]} ]]; then
	MOUNTOPTS=${opts[-o]}
    fi
    local MOUNTPOINT="${1}"
    local ME=${SUDO_USER:-$(whoami)}
    local HOME=$(awk -v a="$ME" -F ':' '{if ($1 == a) print $6}' /etc/passwd 2>/dev/null)
    if [ $? -ne 0 ]; then
	_warning "how pitiful!  A tomb, and no HOME"
	return 1
    fi
    if [ -z "$MOUNTPOINT" -o ! -d "$MOUNTPOINT" ]; then
	_warning "cannot exec bind hooks without a mounted tomb."
	return 1
    fi
    if ! [ -r "$MOUNTPOINT/bind-hooks" ]; then
	xxx "bind-hooks not found in $MOUNTPOINT"
	return 1
    fi
    typeset -al mounted
    typeset -Al maps
    maps=($(<"$MOUNTPOINT/bind-hooks"))
    for dir in ${(k)maps}; do
	if [ "${dir[1]}" = "/" -o "${dir[1,2]}" = ".." ]; then
	    _warning "bind-hooks map format: local/to/tomb local/to/\$HOME"
	    continue
	fi
	if [ "${${maps[$dir]}[1]}" = "/" -o "${${maps[$dir]}[1,2]}" = ".." ]; then
	    _warning "bind-hooks map format: local/to/tomb local/to/\$HOME.  Rolling back"
	    for dir in ${mounted}; do umount $dir; done
	    return 1
	fi
	if [ ! -r "$HOME/${maps[$dir]}" ]; then
	    _warning "bind-hook target not existent, skipping $HOME/${maps[$dir]}"
	elif [ ! -r "$MOUNTPOINT/$dir" ]; then
	    _warning "bind-hook source not found in tomb, skipping ${MOUNTPOINT}/${dir}"
	else
	    mount -o bind,$MOUNTOPTS $MOUNTPOINT/$dir $HOME/${maps[$dir]}
	    mounted+=("$HOME/${maps[$dir]}")
	fi
    done
}

exec_safe_post_hooks() {
    local mnt=$1 # first argument is where the tomb is mounted
    local ME=${SUDO_USER:-$(whoami)}
    if ! [ -x ${mnt}/post-hooks ]; then return; fi

    cat ${mnt}/post-hooks | head -n1 | grep '^#!/'
    if [ $? = 0 ]; then
	_success "post hooks found, executing as user $SUDO_USER"
	exec_as_user ${mnt}/post-hooks $2
    fi
}

forge_key() {
    _message "Commanded to forge key $1"

    if ! [ $1 ]; then
	  _warning "no key name specified for creation"
	return 1
    fi

    if ! option_is_set -f && ! option_is_set --ignore-swap; then check_swap; fi

    keytmp=`safe_dir tomb`
    (( $? )) && die "error creating temp dir"
    xxx "safe_dir at $keytmp"

    mount tmpfs "${keytmp}" -t tmpfs -o size=1m
    if [ $? != 0 ]; then
	_warning "cannot mount tmpfs filesystem in volatile memory"
	rm -r "${keytmp}"
	die "operation aborted."
    fi

    tombkey="$1"

    _message "this operation takes time, keep using this computer on other tasks,"
    _message "once done you will be asked to choose a password for your tomb."
    _message "To make it faster you can move the mouse around."
    _message "If you are on a server, you can use an Entropy Generation Daemon."

    touch ${keytmp}/tomb.tmp
    chmod 0600 ${keytmp}/tomb.tmp
    random_source=/dev/random
    if option_is_set --use-urandom; then
	random_source=/dev/urandom
    fi

    xxx "Data dump using ${DD[1]} from $random_source"
    ${=DD} bs=1 count=256 if=$random_source of=${keytmp}/tomb.tmp

    if ! [ -r ${keytmp}/tomb.tmp ]; then
	_warning "cannot generate encryption key"
	umount ${keytmp}
	rm -r $keytmp
	die "operation aborted."
    fi

    _success "Choose the password of your key: ${tombkey}"
    _message "(you can also change it later using 'tomb passwd')"
    touch ${tombkey}
    chown ${_uid}:${_gid} ${tombkey}
    chmod 0600 ${tombkey}

    tombname="$tombkey"

    gen_key ${keytmp}/tomb.tmp > ${tombkey}

    if ! is_valid_key ${tombkey}; then
	_warning "The key does not seem to be valid"
	_warning "Dumping contents to screen:"
	cat ${tombkey}
	_warning "--"
	umount ${keytmp}
	rm -r $keytmp
	die "operation aborted."
    fi

    ${=WIPE} ${keytmp}/tomb.tmp # no need really, but anyway
    umount ${keytmp}
    rm -r ${keytmp}

    chown ${_uid}:${_gid} ${tombkey}

    _message "done forging $tombkey"
    _success "Your key is ready:"
    ls -lh ${tombkey}
}

dig_tomb() {
    _message "Commanded to dig tomb $1"

    if ! option_is_set -f && ! option_is_set --ignore-swap; then check_swap; fi

    if ! [ $1 ]; then
	_warning "no tomb name specified for creation"
	return 1
    fi


    tombfile=`basename $1`
    tombdir=`dirname $1`

    tombname=${tombfile%%\.*}
    tombfile=${tombname}.tomb

    tombsize="`option_value -s`"

    [ $tombsize ] || die "Size argument missing, use --size"

    [[ $tombsize != <-> ]] && die "Size argument is not an integer"

    [[ $tombsize -lt 10 ]] && die "Tombs can't be smaller than 10 megabytes"

    if [ -e ${tombdir}/${tombfile} ]; then
	_warning "A tomb exists already. I'm not digging here:"
	_warning " `ls -lh ${tombdir}/${tombfile}`"
	return 1
    fi

    _success "Creating a new tomb in ${tombdir}/${tombfile}"

    _message "Generating ${tombfile} of ${tombsize}MiB"

    touch ${tombdir}/${tombfile}
    chmod 0600 "${tombdir}/${tombfile}"
    chown $_uid:$_gid "${tombdir}/${tombfile}"

    xxx "Data dump using ${DD[1]} from /dev/urandom"
    ${=DD} if=/dev/urandom bs=1048576 count=${tombsize} of=${tombdir}/${tombfile}

    if [ $? = 0 -a -e ${tombdir}/${tombfile} ]; then
	_message " `ls -lh ${tombdir}/${tombfile}`"
    else
	die "Error creating the tomb ${tombdir}/${tombfile}, operation aborted."
    fi

    _success "Done digging $tombname"
    _message "your tomb is not yet ready, you need to forge a key and lock it:"
    _message "tomb forge ${tombname}.tomb.key"
    _message "tomb lock ${tombname}.tomb ${tombname}.tomb.key"
}

typeset -h tombkeydir
load_key() {

    local tombdir="$1"
    local tombname="$2"
    if option_is_set -k ; then
	if [[ "`option_value -k`" == "-" ]]; then

	    local tombkeydir
	    tombkeydir=`safe_dir`
	    cat > ${tombkeydir}/stdin.tmp
	    tombkey=${tombkeydir}/stdin.tmp
	else

	    tombkey=`option_value -k`
	fi
    else

	tombkey=${tombdir}/${tombname}.tomb.key
    fi

    if [ -r "${tombkey}" ]; then
	_message "We'll use this key:"
	_message " `ls -lh ${tombkey}`"
    else
	return 1
    fi

    if ! is_valid_key ${tombkey}; then
	_warning "The key seems invalid, the application/pgp header is missing"
	return 1
    fi
    print "$tombkey"
    return 0
}

ask_key_password() {
    tombkey="$1"
    local keyname=`basename $tombkey`
    _message "a password is required to use key ${keyname}"
    local passok=0
    local tombpass=""
    if option_is_set --tomb-pwd; then
	    tombpass=`option_value --tomb-pwd`
    else
	for c in 1 2 3; do
	    if [ $c = 1 ]; then
		tombpass=`exec_as_user ${TOMBEXEC} askpass "Insert password to use key: $keyname"`
	    else
		tombpass=`exec_as_user ${TOMBEXEC} askpass "Insert password to use key: $keyname (retry $c)"`
	    fi
	    if [[ $? != 0 ]]; then
		_warning "User aborted password dialog"
		return 1
	    fi

	    get_lukskey "$tombpass" ${tombkey} >/dev/null

	    if [ $? = 0 ]; then
		passok=1; _message "Password OK."
		break;
	    fi
	done
    fi

    { test "$passok" = "1" } || { return 1 }
    print "$tombpass"
    unset $tombpass
    return 0
}
drop_key() {
   { test "$tombkeydir" = "" } && { return 0 }
   { test -r ${tombkeydir}/stdin.tmp } && {
       ${=WIPE} ${tombkeydir}/stdin.tmp; rmdir ${tombkeydir} }
}

lock_tomb_with_key() {
    if ! [ $1 ]; then
	_warning "no tomb specified for locking"
	_warning "usage: tomb lock file.tomb file.tomb.key"
	return 1
    fi

    tombfile=`basename $1`
    _message "Commanded to lock tomb ${tombfile}"

    tombdir=`dirname $1`

    tombname=${tombfile%%\.*}
    tombfile=${tombname}.tomb

    if ! [ -e ${tombdir}/${tombfile} ]; then
	die "There is no tomb here. You have to it dig first."
	return 1
    fi

    xxx "tomb found: ${tombdir}/${tombfile}"

    nstloop=`losetup -f` # get the number for next loopback device
    losetup -f ${tombdir}/${tombfile} # allocates the next loopback for our file

    xxx "loop mounted on ${nstloop}"

    _message "checking if the tomb is empty (we never step on somebody else's bones)"
    cryptsetup isLuks ${nstloop}
    if [ $? = 0 ]; then

	_warning "The tomb was already locked with another key"
	losetup -d ${nstloop}
	die "Operation aborted. I cannot lock an already locked tomb. Go dig a new one."
    else
	_message "fine, this tomb seems empty."
    fi

    tombkey=`load_key ${tombdir} ${tombname}`
    { test $? = 0 } || {
	losetup -d $nstloop
	die "Aborting operations: error loading key $tombkey" }

    if option_is_set -o; then
	cipher="`option_value -o`"
    else
	cipher="aes-cbc-essiv:sha256"
    fi
    _message "locking using cipher: $cipher"

    tombpass=`ask_key_password "$tombkey"`
    { test $? = 0 } || {
	losetup -d ${nstloop}
	die "No valid password supplied" }

    _success "Locking ${tombfile} with ${tombkey}"

    _message "formatting Luks mapped device"
    get_lukskey "${tombpass}" ${tombkey} | \
	cryptsetup --key-file -   --batch-mode \
	--cipher ${cipher} --key-size 256 --key-slot 0 \
	luksFormat ${nstloop}
    if ! [ $? = 0 ]; then
	_warning "cryptsetup luksFormat returned an error"
	unset tombpass
	losetup -d $nstloop
	die "Operation aborted."
    fi

    get_lukskey "${tombpass}" ${tombkey} | \
	cryptsetup --key-file - \
	--cipher ${cipher} luksOpen ${nstloop} tomb.tmp
    if ! [ $? = 0 ]; then
	_warning "cryptsetup luksOpen returned an error"
	unset tombpass
	losetup -d $nstloop
	die "Operation aborted."
    fi

    unset tombpass
    drop_key # make sure all temp files are out

    _message "formatting your Tomb with Ext3/Ext4 filesystem"
    ${=MKFS} ${tombname} /dev/mapper/tomb.tmp

    if [ $? != 0 ]; then
	_warning "Tomb format returned an error"
	_warning "your tomb ${tombfile} may be corrupted."
    fi

    sync

    cryptsetup luksClose tomb.tmp
    losetup -d ${nstloop}


    _message "done locking $tombname using Luks dm-crypt ${create_cipher}"
    _success "Your tomb is ready in ${tombdir}/${tombfile} and secured with key ${tombkey}"

}

create_tomb() {
    if ! [ $1 ]; then
	_warning "no tomb name specified for creation"
	return 1
    fi

    dig_tomb ${=PARAM}
    { test $? = 0 } || { die "Failed to dig tomb, operation aborted." }

    tombfile=`basename $1`
    tombdir=`dirname $1`

    tombname=${tombfile%%\.*}
    tombfile=${tombname}.tomb

    forge_key ${tombfile}.key
    { test $? = 0 } || { die "Failed to forge key, operation aborted." }

    lock_tomb_with_key ${tombfile} -l ${tombfile}.key
    { test $? = 0 } || { die "Failed to lock tomb with key, operation aborted." }

    yes "Tomb $tombname succesfully created"
    ls -l ${tombfile}*
}


#internal use
#$1 is the keyfile we are checking
is_valid_key() {
    [[ `file =(awk '/^-+BEGIN/,0' $1) -bi` =~ application/pgp ]]
    return $?
}
#internal use
#$1 is the password, $2 is the keyfile
#will output the lukskey
get_lukskey() {
    local tombpass=$1
    local keyfile=$2
    firstline=`head -n1 $keyfile`
    xxx "get_lukskey XXX $keyfile"
    if [[ $firstline =~ '^_KDF_' ]]; then
	_verbose "KDF: `cut -d_ -f 3 <<<$firstline`"
	case `cut -d_ -f 3 <<<$firstline` in
	    pbkdf2sha1)
		if [[ -z $KDF_PBKDF2 ]]; then
		    die "The tomb use kdf method 'pbkdf2', which is unsupported on your system"
		fi
		pbkdf2_param=`cut -d_ -f 4- <<<$firstline | tr '_' ' '`
		tombpass=$(${KDF_PBKDF2} ${=pbkdf2_param} 2> /dev/null <<<$tombpass)
		;;
	    *)
		_failure "No suitable program for KDF `cut -f 3 <<<$firstline`"
		unset tombpass
		return 1
		;;
	esac
    fi
    print ${tombpass} | \
	gpg --batch --passphrase-fd 0 --no-tty --no-options --status-fd 2 \
	-d "${keyfile}" 2> /dev/null
    ret=$?
    xxx "gpg decryption returns $ret"
    unset tombpass
    return $ret
}

gen_key() {
    local lukskey=$1

    local tombpass=""
    local tombpasstmp=""
    if ! option_is_set --tomb-pwd; then
	while true; do

	    tombpass=`exec_as_user ${TOMBEXEC} askpass "Secure key for ${tombname}"`
	    if [[ $? != 0 ]]; then
		die "User aborted"
	    fi
	    if [ -z $tombpass ]; then
		_warning "you set empty password, which is not possible"
		continue
	    fi
	    tombpasstmp=$tombpass
	    tombpass=`exec_as_user ${TOMBEXEC} askpass "Secure key for ${tombname} (again)"`
	    if [[ $? != 0 ]]; then
		die "User aborted"
	    fi
	    if [ "$tombpasstmp" = "$tombpass" ]; then
		break;
	    fi
	    unset tombpasstmp
	    unset tombpass
	done
    else
	tombpass=`option_value --tomb-pwd`
    fi

    _verbose "KDF method chosen is: '`option_value --kdf`'"
    kdf_method=$(cut -d: -f1 <<<`option_value --kdf` )
    case $kdf_method in
	pbkdf2)
	    if [[ -z $KDF_PBKDF2 ]]; then
		die "The tomb use kdf method 'pbkdf2', which is unsupported on your system"
	    fi

	    seconds=$(cut -d: -f2 -s <<<`option_value --kdf`)
	    if [[ -z $seconds ]]; then
		seconds=1
	    fi
	    local -i microseconds
	    microseconds=$((seconds*1000000))
	    _verbose "Microseconds: $microseconds"
	    pbkdf2_salt=`${KDF_PBKDF2}-gensalt`
	    pbkdf2_iter=`${KDF_PBKDF2}-getiter $microseconds`

	    tombpass=`${KDF_PBKDF2} $pbkdf2_salt $pbkdf2_iter 64 <<<"${tombpass}"`

	    header="_KDF_pbkdf2sha1_${pbkdf2_salt}_${pbkdf2_iter}_64\n"
	    ;;
	""|null)

	    header=""
	    ;;
	*)
	    _warning "KDF method non recognized"
	    return 1
	    header=""
	    ;;
    esac
    echo -n $header

    print "${tombpass}" \
	| gpg --openpgp --batch --no-options --no-tty --passphrase-fd 0 2>/dev/null \
	-o - -c -a ${lukskey}

    unset tombpass
}

mount_tomb() {
    _message "Commanded to open tomb $1"

    if ! option_is_set -f && ! option_is_set --ignore-swap; then check_swap; fi

    if ! [ ${1} ]; then
	_warning "no tomb name specified for creation"
	return 1
    fi

    local tombkey
    local tombfile
    local tombdir
    local tombname
    tombfile=`basename ${1}`
    tombdir=`dirname ${1}`

    file ${tombdir}/${tombfile} | grep -i 'luks encrypted file' 2>&1 >/dev/null
    if [ $? != 0 ]; then
	_warning "$1 is not a valid tomb file, operation aborted"
	return 1
    fi
    tombname=${tombfile%%\.*}
    xxx "tomb found: ${tombdir}/${tombfile}"

    tombkey=`load_key ${tombdir} ${tombname}`
    { test $? = 0 } || {
	die "Aborting operations: error loading key $tombkey" }


    if [ "$2" = "" ]; then
	tombmount=/media/${tombfile}
	_message "mountpoint not specified, using default: $tombmount"
    else
	tombmount=$2
    fi

    mount -l | grep "${tombfile}.*\[$tombname\]$" 2>&1 > /dev/null
    if [ $? = 0 ]; then
	_warning "$tombname is already open."
	_message "here below its status is reported:"
	list_tombs ${tombname}
	return 1
    fi

    _success "Opening $tombfile on $tombmount"


    nstloop=`losetup -f`
    if [ $? = 255 ]; then
	die "too many tomb opened. Please close any of them to open another tomb"
    fi
    losetup -f ${tombdir}/${tombfile}

    cryptsetup isLuks ${nstloop}
    if [ $? != 0 ]; then

	_warning "$tombfile is not a valid Luks encrypted storage file"
	return 1
    fi
    say "this tomb is a valid LUKS encrypted device"

    luksdump="`cryptsetup luksDump ${nstloop}`"
    tombdump=(`print $luksdump | awk '
	/^Cipher name/ {print $3}
	/^Cipher mode/ {print $3}
	/^Hash spec/   {print $3}'`)
    say "cipher is \"$tombdump[1]\" mode \"$tombdump[2]\" hash \"$tombdump[3]\""

    slotwarn=`print $luksdump | awk '
	BEGIN { zero=0 }
	/^Key slot 0/ { zero=1 }
	/^Key slot.*ENABLED/ { if(zero==1) print "WARN" }'`
    { test "$slotwarn" = "WARN" } && {
	_warning "Multiple key slots are enabled on this tomb. Beware: there can be a backdoor." }

    mapdate=`date +%s`

    mapper="tomb.${tombname}.${mapdate}.`basename $nstloop`"
    keyname=`basename $tombkey | cut -d. -f1`

    tombpass=`ask_key_password $tombkey`
    { test $? = 0 } || {
	die "No valid password supplied" }

    get_lukskey "${tombpass}" ${tombkey} | \
	cryptsetup --key-file - luksOpen ${nstloop} ${mapper}

    drop_key
    unset tombpass

    if ! [ -r /dev/mapper/${mapper} ]; then
	losetup -d ${nstloop}
	die "failure mounting the encrypted file"
    fi

    tombstat=(`cryptsetup status ${mapper} | awk '
    /cipher:/  {print $2}
    /keysize:/ {print $2}
    /device:/  {print $2}'`)
    yes "Success unlocking tomb $tombname"
    xxx "key size is $tombstat[2] for cipher $tombstat[1]"

    _message "checking filesystem via $tombstat[3]"
    fsck -p -C0 /dev/mapper/${mapper}
    xxx "tomb engraved as $tombname"
    tune2fs -L ${tombname} /dev/mapper/${mapper} > /dev/null

    mkdir -p $tombmount

    mount -o $MOUNTOPTS /dev/mapper/${mapper} ${tombmount}

    chown ${_uid}:${_gid} ${tombmount}
    chmod 0750 ${tombmount}

    _success "Success opening $tombfile on $fg_bold[white]$tombmount$fg_no_bold[white]"

    { test -r ${tombmount}/.last } && {
	tombtty="`cat ${tombmount}/.tty`"
	tombhost="`cat ${tombmount}/.host`"
	tombuid="`cat ${tombmount}/.uid`"
	tomblast="`cat ${tombmount}/.last`"
	tombuser=`awk -F: '/:'"$tombuid"':/ {print $1}' /etc/passwd`
	say "last visit by $fg_bold[white]$tombuser($tombuid)$fg_no_bold[white] from $fg_bold[white]$tombtty$fg_no_bold[white] on $fg_bold[white]$tombhost$fg_no_bold[white]"
	say "on date $fg_bold[white]`date --date @${tomblast} +%c`$fg_no_bold[white]"
    }

    rm -f ${tombmount}/.uid
    echo ${_uid} > ${tombmount}/.uid
    rm -f ${tombmount}/.tty
    echo ${_tty} > ${tombmount}/.tty

    rm -f ${tombmount}/.host
    echo `hostname` > ${tombmount}/.host

    rm -f ${tombmount}/.last
    echo "`date +%s`" > ${tombmount}/.last

    if ! option_is_set -n ; then
	exec_safe_bind_hooks ${tombmount}
	exec_safe_post_hooks ${tombmount} open
    fi
    return 0
}

list_tomb_mounts() {
    if [ "$1" = "" ]; then

	mount -l \
	    | awk '
BEGIN { main="" }
/^\/dev\/mapper\/tomb/ {
  if(main==$1) next;
  print $1 ";" $3 ";" $5 ";" $6 ";" $7
  main=$1
}
'
    else

	mount -l \
	    | awk -vtomb="[$1]" '
BEGIN { main="" }
/^\/dev\/mapper\/tomb/ {
  if($7!=tomb) next;
  if(main==$1) next;
  print $1 ";" $3 ";" $5 ";" $6 ";" $7
  main=$1
}
'
    fi
}

list_tomb_binds() {
    if [ "$1" = "" ]; then
	_failure "internal error: list_tomb_binds called without argument."; fi

    mount -l \
	| awk -vtomb="$1" '
BEGIN { main="" }
/^\/dev\/mapper\/tomb/ {
  if($7!=tomb) next;
  if(main=="") { main=$1; next; }
  if(main==$1)
    print $1 ";" $3 ";" $5 ";" $6 ";" $7
}
'

    tombmount=`mount -l \
      | awk -vtomb="$1" '
/^\/dev\/mapper\/tomb/ { if($7!=tomb) next; print $3; exit; }'`

    mount -l | grep "^$tombmount" \
	| awk -vtomb="$1" '
	/bind/ { print $1 ";" $3 ";" $5 ";" $6 ";" $7 }'
}

slam_tomb() {

    if [[ -z `fuser -m "$1" 2> /dev/null` ]]; then
	return 0
    fi
    #Note: shells are NOT killed by INT or TERM, but they are killed by HUP
    for s in TERM HUP KILL; do
	xxx "Sending $s to processes inside the tomb:"
	if option_is_set -D; then
	    ps -fp `fuser -m /media/a.tomb 2> /dev/null`|
	    while read line; do
		xxx $line
	    done
	fi
	fuser -s -m "$1" -k -M -$s
	if [[ -z `fuser -m "$1" 2> /dev/null` ]]; then
	    return 0
	fi
	if ! option_is_set -f; then
	    sleep 3
	fi
    done
    return 1
}

umount_tomb() {
    local tombs how_many_tombs
    local pathmap mapper tombname tombmount loopdev
    local ans pidk pname

    if [ "$1" = "all" ]; then
	mounted_tombs=(`list_tomb_mounts`)
    else
	mounted_tombs=(`list_tomb_mounts $1`)
    fi

    { test ${#mounted_tombs} = 0 } && {
	    _warning "There is no open tomb to be closed"
	    return 1 }

    { test ${#mounted_tombs} -gt 1 } && { test "$1" = "" } && {
	    _warning "Too many tombs mounted, please specify one (see tomb list)"
	    _warning "or issue the command 'tomb close all' to close them all."
	    return 1 }

    say "Tomb close $1"

    for t in ${mounted_tombs}; do
	mapper=`basename ${t[(ws:;:)1]}`
	tombname=${t[(ws:;:)5]}
	tombmount=${t[(ws:;:)2]}
	tombfs=${t[(ws:;:)3]}
	tombfsopts=${t[(ws:;:)4]}
	tombloop=${mapper[(ws:.:)4]}

	xxx "name: $tombname"
	xxx "mount: $tombmount"
	xxx "mapper: $mapper"

	{ test -e "$mapper" } && {
	    _warning "Tomb not found: $1"
	    _warning "Please specify an existing tomb."
	    return 0 }

	if [ $SLAM ]; then
	    _success "Slamming tomb $tombname mounted on $tombmount"
	    _message "Kill all processes busy inside the tomb"
	    if ! slam_tomb "$tombmount"; then
		_warning "Cannot slam the tomb $tombname"
		return 1
	    fi
	else
	    say "Closing tomb $tombname mounted on $tombmount"
	fi

	bind_tombs=(`list_tomb_binds $tombname`)
	for b in ${bind_tombs}; do
	    bind_mapper="${b[(ws:;:)1]}"
	    bind_mount="${b[(ws:;:)2]}"
	    _message "closing tomb bind hook: $bind_mount"
	    umount $bind_mount
	    if [[ $? != 0 ]]; then
		if [ $SLAM ]; then
		    _success "Slamming tomb: killing all processes using this hook"
		    slam_tomb "$bind_mount"
		    if [[ $? == 1 ]]; then
			_warning "Cannot slam the bind hook $bind_mount"
			return 1
		    fi
		    umount $bind_mount
		else
		    _warning "Tomb bind hook $bind_mount is busy, cannot close tomb."
		fi
	    fi
	done

	if ! option_is_set -n ; then
	    exec_safe_post_hooks ${tombmount%%/} close
	fi

	xxx "performing umount of $tombmount"
	umount ${tombmount}
	if ! [ $? = 0 ]; then _warning "Tomb is busy, cannot umount!"
	else

	    { test "${tombmount}" = "/media/${tombname}.tomb" } && {
		rmdir ${tombmount} }
	fi

	cryptsetup luksClose $mapper
	{ test $? = 0 } || {
	    _warning "error occurred in cryptsetup luksClose ${mapper}"
	    return 1 }

	losetup -d "/dev/$tombloop"

    #	awkmapper=`sed 's:\/:\\\/:g' <<< $mapper`
    #	statustray_pid=`ps ax | awk "/tomb-status $awkmapper/"' {print $1} '`
    #	{ test "$statustray_pid" = "" } || { kill ${statustray_pid} }

	_success "Tomb $tombname closed: your bones will rest in peace."

    done # loop across mounted tombs

    return 0
}

change_passwd() {
    _message "Commanded to change password for tomb key $1"
    if ! option_is_set -f && ! option_is_set --ignore-swap; then check_swap; fi

    local keyfile="$1"

    if ! [ -r $keyfile ]; then
	_warning "key not found: $keyfile"
	return 1
    fi

    if ! is_valid_key $keyfile ; then
	_warning "file doesn't seems to be a tomb key: $keyfile"
	_warning "operation aborted."
	return 1
    fi

    local tmpnewkey lukskey c tombpass tombpasstmp

    tmpnewkey=`safe_filename tombnew`
    lukskey=`safe_filename tombluks`

    _success "Changing password for $keyfile"

    tombpass=`ask_key_password $keyfile`
    { test $? = 0 } || {
	die "No valid password supplied" }

    get_lukskey "${tombpass}" ${keyfile} > ${lukskey};

    drop_key

    {
	gen_key $lukskey > ${tmpnewkey}

	if ! is_valid_key $tmpnewkey; then
	    die "Error: the newly generated keyfile does not seem valid"
	else

	    cp "${tmpnewkey}" "${keyfile}"
	    _success "Your passphrase was successfully updated."
	fi
    } always {
	_verbose "cleanup: $tmpnewkey $lukskey"

	${=WIPE} "${tmpnewkey}"
	${=WIPE} "${lukskey}"
    }

    return $?
}

resize_tomb() {
    _message "Commanded to resize tomb $1 to $opts[-s] megabytes"
    if ! [ $1 ]; then
	_failure "No tomb name specified for resizing"
    elif ! [ -r "$1" ]; then
	_failure "Cannot find $1"
    fi

    local c tombpass tombkey
    local tombfile=`basename $1`
    local tombdir=`dirname $1`

    local tombname=${tombfile%%\.*}
    tombfile=${tombname}.tomb

    tombkey=`load_key ${tombdir} ${tombname}`
    { test $? = 0 } || {
	die "Aborting operations: error loading key $tombkey" }

    local tmp_resize=`safe_filename tmbrsz`
    local newtombsize=$opts[-s]
    local oldtombsize=`stat -c %s "$1" 2>/dev/null`
    local mounted_tomb=`mount -l |
	awk -vtomb="[$tombname]" '/^\/dev\/mapper\/tomb/ { if($7==tomb) print $1 }'`

    if [ "$mounted_tomb" ]; then
	_failure "the tomb $tombname is open, to resize it it needs to be close."
    fi

    newtombsize=`expr \( $newtombsize \* 1024 \) \* 1024 2> /dev/null`

    if ! [ "$newtombsize" ] ; then
	_failure "You must specify the new size of $tombname"
    elif [[ $newtombsize != <-> ]]; then
	_failure "Size is not an integer"
    elif [ "$newtombsize" -le "$oldtombsize" ]; then
	_failure "the new size must be greater then old tomb size."
    fi

    local delta=`expr $newtombsize \- $oldtombsize`

    act "Generating ${tombfile} of ${newtombsize}MiB"

    xxx "Data dump using ${DD[1]} from /dev/urandom"
    ${=DD} if=/dev/urandom bs=1048576 count=${tombsize} of="${tmp_resize}"

    if [ $? = 0 -a -e "${tmp_resize}" ]; then
	xxx "OK: `ls -lh ${tmp_resize}`"
    else
	_failure "Error creating the extra resize $tmp_resize, operation aborted."
    fi

    cat "${tmp_resize}" >> "$1"
    ${=WIPE} "${tmp_resize}"


    tombpass=`ask_key_password $tombkey`
    { test $? = 0 } || {
	die "No valid password supplied" }

    local nstloop=`losetup -f`
    if [ $? = 255 ]; then
	_failure "too many tomb opened. Please close any of them to open another tomb"
    fi

    losetup -f "$1"

    local mapdate=`date +%s`
    local mapper="tomb.${tombname}.${mapdate}.`basename $nstloop`"

    get_lukskey "${tombpass}" ${tombkey} | \
	cryptsetup --key-file - luksOpen ${nstloop} ${mapper}

    unset tombpass
    drop_key # cleanup after load_key

    if ! [ -r /dev/mapper/${mapper} ]; then
	losetup -d ${nstloop}
	_failure "failure mounting the encrypted file"
    fi

    cryptsetup resize "${mapper}"
    if [ $? != 0 ]; then
	losetup -d ${nstloop}
	_failure "cryptsetup failed to resize $mapper"
    fi

    e2fsck -f /dev/mapper/${mapper}
    if [ $? != 0 ]; then
	losetup -d ${nstloop}
	_failure "e2fsck failed to check $mapper"
    fi

    resize2fs /dev/mapper/${mapper}
    if [ $? != 0 ]; then
	losetup -d ${nstloop}
	_failure "resize2fs failed to resize $mapper"
    fi

    sleep 1 # needs to settle a bit

    cryptsetup luksClose "${mapper}"
    losetup -d ${nstloop}

    return 0
}

index_tombs() {
    { command -v updatedb > /dev/null } || {
	die "Cannot index tombs on this system: updatedb not installed" }

    mounted_tombs=(`list_tomb_mounts $1`)
    { test ${#mounted_tombs} = 0 } && {
	if [ $1 ]; then die "There seems to be no open tomb engraved as [$1]"
	else die "I can't see any open tomb, may they all rest in peace."
	fi
    }

    yes "Creating and updating search indexes"
    for t in ${mounted_tombs}; do
	mapper=`basename ${t[(ws:;:)1]}`
	tombname=${t[(ws:;:)5]}
	tombmount=${t[(ws:;:)2]}
	{ test -r ${tombmount}/.noindex } && {
	    say "skipping $tombname (.noindex found)"
	    continue }
	say "sndexing $tombname"
	updatedb -l 0 -o ${tombmount}/.updatedb -U ${tombmount}
	say "search index updated"
    done
}
search_tombs() {
    { command -v locate > /dev/null } || {
	die "Cannot index tombs on this system: updatedb not installed" }

    mounted_tombs=(`list_tomb_mounts $1`)
    { test ${#mounted_tombs} = 0 } && {
	die "I can't see any open tomb, may they all rest in peace." }
    yes "Searching for: $fg_bold[white]${=PARAM}$fg_no_bold[white]"
    for t in ${mounted_tombs}; do
	xxx "checking for index: ${t}"
	mapper=`basename ${t[(ws:;:)1]}`
	tombname=${t[(ws:;:)5]}
	tombmount=${t[(ws:;:)2]}
	if [ -r ${tombmount}/.updatedb ]; then
	    say "Searching in tomb $tombname"
	    locate -d ${tombmount}/.updatedb -e -i ${=PARAM}
	    say "Matches found: `locate -d ${tombmount}/.updatedb -e -i -c ${=PARAM}`"
	else
	    no "skipping tomb $tombname: not indexed"
	    no "run 'tomb index' to create indexes"
	fi
    done

}

list_tombs() {

    mounted_tombs=(`list_tomb_mounts $1`)
    { test ${#mounted_tombs} = 0 } && {
	die "I can't see any ${1:-open} tomb, may they all rest in peace." }

    for t in ${mounted_tombs}; do
	mapper=`basename ${t[(ws:;:)1]}`
	tombname=${t[(ws:;:)5]}
	tombmount=${t[(ws:;:)2]}
	tombfs=${t[(ws:;:)3]}
	tombfsopts=${t[(ws:;:)4]}
	tombloop=${mapper[(ws:.:)4]}

	ts=`df -hP /dev/mapper/$mapper |
    awk "/mapper/"' { print $2 ";" $3 ";" $4 ";" $5 }'`
	tombtot=${ts[(ws:;:)1]}
	tombused=${ts[(ws:;:)2]}
	tombavail=${ts[(ws:;:)3]}
	tombpercent=${ts[(ws:;:)4]}
	tombp=${tombpercent%%%}
	tombsince=`date --date=@${mapper[(ws:.:)3]} +%c`

	{ test -r ${tombmount}/.tty } && {
	    tombtty="`cat ${tombmount}/.tty`"
	    tombhost="`cat ${tombmount}/.host`"
	    tombuid="`cat ${tombmount}/.uid`"
	    tombuser=`awk -F: '/:'"$tombuid"':/ {print $1}' /etc/passwd`
	}

    if option_is_set --get-mountpoint; then
	echo $tombmount
	continue
    fi

	print -n "$fg[green]$tombname"
	print -n "$fg[white] open on "
	print -n "$fg_bold[white]$tombmount"
	print -n "$fg_no_bold[white] using "
	print "$fg_bold[white]$tombfs $tombfsopts"

	print -n "$fg_no_bold[green]$tombname"
	print -n "$fg_no_bold[white] open since "
	print "$fg_bold[white]$tombsince$fg_no_bold[white]"

	{ test "$tombtty" = "" } || {
	    print -n "$fg_no_bold[green]$tombname"
	    print -n "$fg_no_bold[white] open by "
	    print -n "$fg_bold[white]$tombuser"
	    print -n "$fg_no_bold[white] from "
	    print -n "$fg_bold[white]$tombtty"
	    print -n "$fg_no_bold[white] on "
	    print "$fg_bold[white]$tombhost"
	}

	print -n "$fg_no_bold[green]$tombname"
	print -n "$fg[white] size "
	print -n "$fg_bold[white]$tombtot"
	print -n "$fg_no_bold[white] of which "
	print -n "$fg_bold[white]$tombused"
	print -n "$fg_no_bold[white] used: "
	print -n "$fg_bold[white]$tombavail"
	print -n "$fg_no_bold[white] free ("
	print -n "$fg_bold[white]$tombpercent"
	print "$fg_no_bold[white] full)"

	if [[ ${tombp} -ge 90 ]]; then
	    print -n "$fg_no_bold[green]$tombname"
	    print "$fg_bold[red] Your tomb is almost full!"
	fi

	mounted_hooks=(`list_tomb_binds $tombname`)
	for h in ${mounted_hooks}; do
	    print -n "$fg_no_bold[green]$tombname"
	    print -n "$fg_no_bold[white] hooks "
#	    print -n "$fg_bold[white]`basename ${h[(ws:;:)1]}`"
#	    print -n "$fg_no_bold[white] on "
	    print "$fg_bold[white]${h[(ws:;:)2]}$fg_no_bold[white]"
	done
    done
}

launch_status() {

    which tomb-status > /dev/null
    if [ $? != 0 ]; then
	die "Cannot find tomb-status binary, operation aborted."
	return 1
    fi

    if ! [ $DISPLAY ]; then
	_warning "No active X display found, operation aborted."
	_warning "Status launches a graphical tray applet, you need X running."
	return 1
    fi

    if ! [ $1 ]; then
	tombs=`find /dev/mapper -name 'tomb.*'`
	how_many_tombs=`wc -w <<< "$tombs"`
	if [[ "$how_many_tombs" == "0" ]]; then
	    _warning "There is no open tomb, status cannot be launched"
	    return 1
	elif [[ "$how_many_tombs" == "1" ]]; then
	    #mapper=`find /dev/mapper -name 'tomb.*'`
	    tombname=`find /dev/mapper -name "tomb.*"`
	    tombname=`basename $tombname | cut -d. -f2`
	    _success "launching status for tomb $tombname"
	else
	    _warning "Too many tombs mounted, please specify which one"
	    list_tombs
	    return 0
	fi
    else

	tombname=$1
	ls /dev/mapper | grep "^tomb.${tombname}.*" > /dev/null
	if [ $? != 0 ]; then
	    _warning "Cannot find any tomb named $tombname being open, operation aborted."
	    return 1
	fi
    fi

    tombmap=`mount -l | awk "/\[${tombname}\]$/"' { print $1 } '`
    tombmount=`mount -l | awk "/\[${tombname}\]$/"' { print $3 } '`
    tomb-status $tombmap $tombname $tombmount &!
    return 0
}

main() {
    local -A subcommands_opts
    ### Options configuration

	main_opts=(q -quiet=q D -debug=D h -help=h v -version=v U: -uid=U G: -gid=G T: -tty=T -no-color -unsecure-dev-mode)
    subcommands_opts[__default]=""
    subcommands_opts[open]="f n -nohook=n k: -key=k o: -mount-options=o -ignore-swap -sudo-pwd: -tomb-pwd:"
    subcommands_opts[mount]=${subcommands_opts[open]}

    subcommands_opts[create]="f s: -size=s -force k: -key=k -ignore-swap -kdf: -sudo-pwd: -tomb-pwd:  -use-urandom"

    subcommands_opts[forge]="f -ignore-swap k: -key=k -kdf: -use-urandom"
    subcommands_opts[dig]="f -ignore-swap s: -size=s"
    subcommands_opts[lock]="f -force -ignore-swap s: -size=s k: -key=k -sudo-pwd: -tomb-pwd:"

    subcommands_opts[passwd]="f -ignore-swap -kdf: -tomb-old-pwd: -tomb-pwd: "
    subcommands_opts[close]="-sudo-pwd:"
    subcommands_opts[help]=""
    subcommands_opts[slam]=""
    subcommands_opts[list]="-get-mountpoint"

    subcommands_opts[index]=""
    subcommands_opts[search]=""

    subcommands_opts[help]=""
    subcommands_opts[bury]=""
    subcommands_opts[exhume]=""
    subcommands_opts[decompose]=""
    subcommands_opts[recompose]=""
    subcommands_opts[install]=""
    subcommands_opts[askpass]=""
    subcommands_opts[mktemp]=""
    subcommands_opts[source]=""
    subcommands_opts[status]=""
    subcommands_opts[resize]="s: -size=s k: -key=k"
    subcommands_opts[check]="-ignore-swap"

    ### Detect subcommand
    local -aU every_opts #every_opts behave like a set; that is, an array with unique elements
    for optspec in $subcommands_opts$main_opts; do
	for opt in ${=optspec}; do
	    every_opts+=${opt}
	done
    done
    local -a oldstar
    oldstar=($argv)
	#### detect early: useful for --optiion-parsing
    zparseopts -M -D -Adiscardme ${every_opts}
	if [[ -n ${(k)discardme[--option-parsing]} ]]; then
		echo $1
		if [[ -n "$1" ]]; then
			return 1
		fi
		return 0
	fi
	unset discardme
    if ! zparseopts -M -E -D -Adiscardme ${every_opts}; then
		error "error parsing"
		return 127
	fi
    unset discardme
    subcommand=$1
    if [[ -z $subcommand ]]; then
	subcommand="__default"
    fi

    if [[ -z ${(k)subcommands_opts[$subcommand]} ]]; then
	_warning "There's no such command \"$subcommand\"."
	_failure "Please try -h for help" 127

    fi
    argv=(${oldstar})
    unset oldstar

    ### Parsing global + command-specific options

    set -A cmd_opts ${main_opts} ${=subcommands_opts[$subcommand]}

    if [[ -n $cmd_opts ]]; then
	zparseopts -M -E -D -Aopts ${cmd_opts}
	if [[ $? != 0 ]]; then
	    _warning "Some error occurred during option processing."
	    die "See \"tomb help\" for more info" 127
	fi
    fi
    #build PARAM (array of arguments) and check if there are unrecognized options
    ok=0
    PARAM=()
    for arg in $*; do
	if [[ $arg == '--' || $arg == '-' ]]; then
	    ok=1
	    continue #it shouldnt be appended to PARAM
	elif [[ $arg[1] == '-'  ]]; then
	    if [[ $ok == 0 ]]; then
		die "unrecognized option $arg for subcommand $subcommand" 127
	    fi
	fi
	PARAM+=$arg
    done
    #first parameter actually is the subcommand: delete it and shift
    if [[ $subcommand != '__default' ]]; then
	PARAM[1]=()
	shift
    fi
    ### End parsing command-specific options
    if ! option_is_set --no-color; then
	autoload colors; colors
    fi
    if ! option_is_set --unsecure-dev-mode; then
	for opt in --sudo-pwd --tomb-pwd --use-urandom --tomb-old-pwd; do
	    if option_is_set $opt; then
		die "You specified option $opt, which is DANGEROUS and should only be used for testing\nIf you really want so, add --unsecure-dev-mode" 127
	    fi
	done
    fi

    if option_is_set -U; then _uid="`option_value -U`"; fi
    if option_is_set -G; then _gid="`option_value -G`"; fi
    if option_is_set -T; then _tty="`option_value -T`"; fi

    xxx "Tomb command: $subcommand ${PARAM}"
    xxx "caller uid[$_uid] gid[$_gid] tty[$_tty]"

    case "$subcommand" in

	forge)
	    check_priv
	    forge_key ${=PARAM}
	    ;;
	dig)
	    dig_tomb ${=PARAM}
	    ;;
	lock)
	    check_priv
	    lock_tomb_with_key ${=PARAM}
	    ;;

	create)
	    check_priv
	    create_tomb ${=PARAM}
	    ;;

	mount|open)
	    check_priv
	    mount_tomb $PARAM[1] $PARAM[2]
	    ;;
	umount|close|slam)
	    check_priv
	    [ "$subcommand" =  "slam" ] && SLAM=1
	    umount_tomb $PARAM[1]
	    ;;
	passwd)
	    change_passwd $PARAM[1]
	    ;;
	list)
	    list_tombs $PARAM[1]
	    ;;
	status)
	    launch_status $PARAM[1]
	    ;;

	index)
	    index_tombs $PARAM[1]
	    ;;
	search)
	    search_tombs ${=PARAM}
	    ;;

	help)
	    usage
	    ;;
	bury)
	    if [ "$STEGHIDE" = 0 ]; then
		_warning "steghide not installed. Cannot bury your key"
		return 1
	    fi
		 encode_key $PARAM[1] $PARAM[2] ;;
	exhume)
	    if [ "$STEGHIDE" = 0 ]; then
		_warning "steghide not installed. Cannot exhume your key"
		return 1
	    fi
	    decode_key $PARAM[1] $PARAM[2]
	    ;;
	resize)
	    if [ "$RESIZER" = 0 ]; then
		_warning "resize2fs not installed. Cannot resize your tomb."
		return 1
	    fi
	    check_priv
	    resize_tomb $PARAM[1]
	    ;;

	'source')   return 0 ;;
	install)    check_priv ; install_tomb ;;
	askpass)    ask_password $PARAM[1] $PARAM[2] ;;
	mktemp)     safe_dir $PARAM[1] ;;
	translate)  generate_translatable_strings ;;
      check) check_command $PARAM[1] ;;
	__default)
	    cat <<EOF
Tomb $VERSION - a strong and gentle undertaker for your secrets

 Copyright (C) 2007-2013 Dyne.org Foundation, License GNU GPL v3+
 This is free software: you are free to change and redistribute it
 The latest Tomb sourcecode is published on <http://tomb.dyne.org>
EOF
	    option_is_set -v && {
		cat <<EOF

GnuPG available ciphers:
`list_gnupg_ciphers`
EOF
		return 0
	    }
	    usage
	    ;;
	*)
	    _warning "command \"$subcommand\" not recognized"
	    _message "try -h for help"
	    return 1
	    ;;
    esac
    return $?
}

check_bin


main $@
ret=$?
if [[ $ret != 0 ]]; then #this "if" seems useless, but avoid source tomb source from exiting
    exit $ret
fi