cbash

gistfile1.txt

# boolean checks                                                                                                                                                                    
function if_mounted() {
    local mount_point="$1"
    local device="$2"
    mount | grep "^`printf '%q' "${mount_point}"`" | awk '{ print $3 }' | grep "`printf '%q' "${device}"`" 2>&1>/dev/null
}

function if_lofi_associated(){
    local block_image="$1"
    lofiadm | grep "`printf '%q' ${block_image}`" | awk '{ print $2 }' | grep "^${block_image}$" 2>&1>/dev/null
}


# helpers - definitions? return a string.                                                                                                                                           
function get_lofi_association(){
    local block_image="$1"
    lofiadm | grep "`printf '%q' ${block_image}`" | awk '{ print $1 }'
}

function make_lofi_association(){
    local block_image="$1"
    if ! if_lofi_associated "${block_image}"; then
        lofiadm -a "${block_image}";
    fi
}

# attempters / "promises"                                                                                                                                                           
function append_if_no_such_line() {
    local line="$1";
    local file="$2";
    if ! grep "^`printf '%q' "${line}"`$" ${file} 2>&1>/dev/null ; then echo "${line}" >> ${file} ; fi
}

function mounted_block_image() {
  local filesytem_type="$1";
  local block_image="$2";
  local block_image_mount="$3";

  if if_lofi_associated "${block_image}"; then
      local lofidev=`get_lofi_association "${block_image}"`
  else
      local lofidev=`make_lofi_association "${block_image}"`
  fi

  if ! if_mounted "${block_image_mount}" "${lofidev}"; then
      /usr/bin/mkdir -p "${block_image_mount}"
      mount -F ${filesytem_type} ${lofidev}:c ${block_image_mount}
  fi
}

function directory() {
    local path="$1";
    local owner="$2";
    local group="$3";
    local mode="$4";

    if [ ! -d ${path} ]; then mkdir -p ${path}; fi
    if [ `stat -c '%U:%G' ${path}` != "${owner}:${group}" ]; then chown "${owner}:${group}" ${path} ; fi
    if [ `stat -c '%a' ${path}` != ${mode} ]; then chmod ${mode} ${path}; fi
}