usr.bin.truecrypt-mount

   1 #!/bin/sh
   2
   3 ### TrueCrypt Mount wrapper
   4 ### This file is a part of `truecrypt-extra`
   5 ###
   6 ### (c) Andrew Sichevoi, http://thekondor.net
   7 ### Distributed in the terms of GNU GPL v3.0+ license
   8 ###
   9 ### The latest version is available on http://git.thekondor.net
  10
  11 if [ -f /etc/default/truecrypt ]; then
  12   . /etc/default/truecrypt
  13 fi
  14
  15 run_textual_truecrypt()
  16 {
  17   ${TRUECRYPT_BINARY} --text --non-interactive $@ 2>/dev/null
  18 }
  19
  20 run_regular_truecrypt()
  21 {
  22   ${TRUECRYPT_BINARY} $@
  23 }
  24
  25 setup_defaults_if_not_available()
  26 {
  27   DEFAULT_USER_MOUNT_ROOT=/home/%username%/.mount/encrypted
  28
  29   if [ -z "${USER_MOUNT_ROOT}" ]; then
  30     USER_MOUNT_ROOT=${DEFAULT_USER_MOUNT_ROOT}
  31   fi
  32
  33   DEFAULT_TRUECRYPT_BINARY=/usr/bin/truecrypt
  34   if [ -z "${TRUECRYPT_BINARY}" ]; then
  35     TRUECRYPT_BINARY=${DEFAULT_TRUECRYPT_BINARY}
  36   fi
  37
  38   DEFAULT_EXPLORE_MOUNTED_VOLUME=true
  39   if [ -z "${EXPLORE_MOUNTED_VOLUME}" ]; then
  40     EXPLORE_MOUNTED_VOLUME=${DEFAULT_EXPLORE_MOUNTED_VOLUME}
  41   fi
  42
  43   DEFAULT_ERROR_REPORTING_CHANNEL='/bin/echo %error%'
  44   if [ -z "${ERROR_REPORTING_CHANNEL}" ]; then
  45     ERROR_REPORTING_CHANNEL=${DEFAULT_ERROR_REPORTING_CHANNEL}
  46   fi
  47 }
  48
  49 check_if_mount_point_already_used()
  50 {
  51   _MOUNT_POINT_DIR=$1
  52   _IS_LISTED_IN_TRUECRYPT=$(run_textual_truecrypt --list | grep "${_MOUNT_POINT_DIR}" -c)
  53   if [ 0 -eq $? -a ! 0 -eq ${_IS_LISTED_IN_TRUECRYPT} ]; then
  54     raise_error "Error: mount point '${_MOUNT_POINT_DIR}' is already used by truecrypt. It cannot be used right now."
  55   fi
  56 }
  57
  58 check_if_truecrypt_available()
  59 {
  60   if [ ! -x "${TRUECRYPT_BINARY}" ]; then
  61     raise_error "Error: Truecrypt (${TRUECRYPT_BINARY}) is not available"
  62   fi
  63 }
  64
  65 raise_error()
  66 {
  67   _ERROR_MESSAGE=$(/bin/echo -n "$@" | sed -e 's/\\/\\\\/g' | sed -e "s/\//::/g" | tr \" \')
  68   _ERROR_CMD=$(/bin/echo ${ERROR_REPORTING_CHANNEL} | sed -e "s/%error%/${_ERROR_MESSAGE}/g")
  69   eval "${_ERROR_CMD}"
  70   exit 1
  71 }
  72
  73 check_passed_arguments()
  74 {
  75   if [ 1 != $# ]; then
  76     raise_error "Usage: ${0} <truecrypt-volume>"
  77   fi
  78 }
  79
  80 escape_mount_dir_name()
  81 {
  82   /bin/echo $@ | /usr/bin/tr "[:cntrl:][:space:][:punct:]" "_"
  83 }
  84
  85 generate_mount_point_dir_name()
  86 {
  87   escape_mount_dir_name $1
  88 }
  89
  90 generate_mount_point()
  91 {
  92   _MOUNT_POINT_DIR=$(/bin/echo ${USER_MOUNT_ROOT}/$(generate_mount_point_dir_name $1))
  93   _USERNAME_VAR=$(whoami)
  94   _MOUNT_POINT_DIR=$(/bin/echo ${_MOUNT_POINT_DIR} | /bin/sed -e s/%username%/${_USERNAME_VAR}/g)
  95
  96   /bin/echo ${_MOUNT_POINT_DIR}
  97 }
  98
  99 create_mount_point()
 100 {
 101   _MOUNT_POINT_DIR=$1
 102   if [ ! -d "${_MOUNT_POINT_DIR}" ]; then
 103     /bin/mkdir -p ${_MOUNT_POINT_DIR}
 104     if [ ! 0 -eq $? ]; then
 105       raise_error "Error: failed to create ${_MOUNT_POINT_DIR}"
 106     fi
 107   fi
 108 }
 109
 110 explore_mount_point()
 111 {
 112   if [ ${EXPLORE_MOUNTED_VOLUME} ]; then
 113     _MOUNT_POINT_DIR=${1}
 114     /usr/bin/xdg-open ${_MOUNT_POINT_DIR}
 115   fi
 116 }
 117
 118 mount_tc_volume()
 119 {
 120   _TC_VOLUME=${1}
 121   _MOUNT_POINT_DIR=$(generate_mount_point ${_TC_VOLUME})
 122
 123   check_if_mount_point_already_used ${_MOUNT_POINT_DIR}
 124   create_mount_point ${_MOUNT_POINT_DIR}
 125
 126   run_regular_truecrypt ${_TC_VOLUME} ${_MOUNT_POINT_DIR}
 127   if [ ! 0 -eq $? ]; then
 128     raise_error "Error: truecrypt execution error, code = ${?}"
 129   fi
 130
 131   explore_mount_point ${_MOUNT_POINT_DIR}
 132 }
 133
 134
 135 check_passed_arguments $@
 136 setup_defaults_if_not_available
 137 mount_tc_volume $1