[add] : Added umount.sh

Author: Hayao0819

tools/umount.sh

@@ -0,0 +1,139 @@
+#!/usr/bin/env bash
+#
+# Yamada Hayao
+# Twitter: @Hayao0819
+# Email  : [email protected]
+#
+# (c) 2019-2021 Fascode Network.
+#
+# build.sh
+#
+# The main script that runs the build
+#
+
+set -eu
+
+declare target_dir
+script_path="$( cd -P "$( dirname "$(readlink -f "$0")" )" && cd .. && pwd )"
+tools_dir="${script_path}/tools/"
+debug=false
+nocolor=false
+force=false
+
+_help() {
+    echo "usage ${0} [options] [dir]"
+    echo
+    echo "Unmount everything under the specified directory" 
+    echo
+    echo " General options:"
+    echo "    -f | --force              Force umount (No warning)"
+    echo "    -d | --debug              Enable debug message"
+    echo "    -h | --help               This help message"
+}
+
+# Message common function
+# msg_common [type] [-n] [string]
+msg_common(){
+    local _msg_opts=("-a" "build.sh") _type="${1}"
+    shift 1
+    [[ "${1}" = "-n" ]] && _msg_opts+=("-o" "-n") && shift 1
+    [[ "${nocolor}"  = true ]] && _msg_opts+=("-n")
+    _msg_opts+=("${_type}" "${@}")
+    "${tools_dir}/msg.sh" "${_msg_opts[@]}"
+}
+
+# Show an INFO message
+# ${1}: message string
+msg_info() { msg_common info "${@}"; }
+
+# Show an Warning message
+# ${1}: message string
+msg_warn() { msg_common warn "${@}"; }
+
+# Show an debug message
+# ${1}: message string
+msg_debug() { 
+    [[ "${debug}" = true ]] && msg_common debug "${@}"
+    return 0
+}
+
+# Show an ERROR message then exit with status
+# ${1}: message string
+# ${2}: exit code number (with 0 does not exit)
+msg_error() {
+    msg_common error "${1}"
+    [[ -n "${2:-}" ]] && exit "${2}"
+}
+
+# Unmount helper Usage: _umount <target>
+_umount() { if mountpoint -q "${1}"; then umount -lf "${1}"; fi; }
+
+# Unmount work dir
+umount_work () {
+    local _mount
+    if [[ ! -v "target_dir" ]] || [[ "${target_dir}" = "" ]]; then
+        msg_error "Exception error about working directory" 1
+    fi
+    [[ ! -d "${target_dir}" ]] && return 0
+    while read -r _mount; do
+        if echo "${_mount}" | grep "${target_dir}" > /dev/null 2>&1 || "${force}" = true; then
+            if mountpoint -q "${_mount}"; then
+                msg_info "Unmounting ${_mount}"
+                _umount "${_mount}" 2> /dev/null
+            fi
+        else
+            msg_error "It is dangerous to unmount a directory that is not managed by the script."
+        fi
+    done < <(find "${target_dir}" -mindepth 1 -type d -printf "%p\n" | tac)
+}
+
+
+# Check root.
+if (( ! "${EUID}" == 0 )); then
+    msg_error "This script must be run as root." "1"
+fi
+
+# Parse options
+OPTS=("dfh")
+OPTL=("debug" "force" "help:")
+if ! OPT=$(getopt -o "$(printf "%s," "${OPTS[@]}")" -l "$(printf "%s," "${OPTL[@]}")" --  "${@}"); then
+    exit 1
+fi
+
+eval set -- "${OPT}"
+msg_debug "Argument: ${OPT}"
+unset OPT OPTS OPTL
+
+while true; do
+    case "${1}" in
+        -d | --debug)
+            debug=true
+            shift 1
+            ;;
+        -f | --force)
+            force=true
+            shift 1
+            ;;
+        -h | --help)
+            _usage
+            exit 0
+            ;;
+        --)
+            shift
+            break
+            ;;
+        *)
+            msg_error "Invalid argument '${1}'"
+            _usage 1
+            ;;
+    esac
+done
+
+
+if [[ -z "${1+SET}" ]]; then
+    msg_error "Please specify the target directory." "1"
+else
+    target_dir="${1}"
+fi
+
+umount_work