Update create_lxc.sh

add new error_handler

ct/create_lxc.sh

@@ -9,7 +9,15 @@ CM="${GN}✓${CL}"
 CROSS="${RD}✗${CL}"
 BFR="\\r\\033[K"
 HOLD="-"
-
+set -Eeuo pipefail
+trap 'error_handler $LINENO "$BASH_COMMAND"' ERR
+function error_handler() {
+  local exit_code="$?"
+  local line_number="$1"
+  local command="$2"
+  local error_message="${RD}[ERROR]${CL} in line ${RD}$line_number${CL}: exit code ${RD}$exit_code${CL}: while executing command ${YW}$command${CL}"
+  echo -e "\n$error_message\n"
+}
 function msg_info() {
   local msg="$1"
   echo -ne " ${HOLD} ${YW}${msg}..."
@@ -36,23 +44,6 @@ if [ -z "$VALIDTMP" ]; then
   exit 1
 fi
 
-set -o errexit
-set -o errtrace
-set -o nounset
-set -o pipefail
-shopt -s expand_aliases
-alias die='EXIT=$? LINE=$LINENO error_exit'
-trap die ERR
-
-function error_exit() {
-  trap - ERR
-  local reason="Unknown failure occurred."
-  local msg="${1:-$reason}"
-  local flag="${RD}‼ ERROR ${CL}$EXIT@$LINE"
-  echo -e "$flag $msg" 1>&2
-  exit $EXIT
-}
-
 function select_storage() {
   local CLASS=$1
   local CONTENT
@@ -66,7 +57,7 @@ function select_storage() {
     CONTENT='vztmpl'
     CONTENT_LABEL='Container template'
     ;;
-  *) false || die "Invalid storage class." ;;
+  *) false || exit "Invalid storage class." ;;
   esac
 
   local -a MENU
@@ -90,21 +81,21 @@ function select_storage() {
       STORAGE=$(whiptail --title "Storage Pools" --radiolist \
         "Which storage pool you would like to use for the ${CONTENT_LABEL,,}?\n\n" \
         16 $(($MSG_MAX_LENGTH + 23)) 6 \
-        "${MENU[@]}" 3>&1 1>&2 2>&3) || die "Menu aborted."
+        "${MENU[@]}" 3>&1 1>&2 2>&3) || exit "Menu aborted."
     done
     printf $STORAGE
   fi
 }
 
-[[ "${CTID:-}" ]] || die "You need to set 'CTID' variable."
+[[ "${CTID:-}" ]] || exit "You need to set 'CTID' variable."
-[[ "${PCT_OSTYPE:-}" ]] || die "You need to set 'PCT_OSTYPE' variable."
+[[ "${PCT_OSTYPE:-}" ]] || exit "You need to set 'PCT_OSTYPE' variable."
 
-[ "$CTID" -ge "100" ] || die "ID cannot be less than 100."
+[ "$CTID" -ge "100" ] || exit "ID cannot be less than 100."
 
 if pct status $CTID &>/dev/null; then
   echo -e "ID '$CTID' is already in use."
   unset CTID
-  die "Cannot use ID that is already in use."
+  exit "Cannot use ID that is already in use."
 fi
 
 TEMPLATE_STORAGE=$(select_storage template) || exit
@@ -119,13 +110,13 @@ msg_ok "Updated LXC Template List"
 
 TEMPLATE_SEARCH=${PCT_OSTYPE}-${PCT_OSVERSION:-}
 mapfile -t TEMPLATES < <(pveam available -section system | sed -n "s/.*\($TEMPLATE_SEARCH.*\)/\1/p" | sort -t - -k 2 -V)
-[ ${#TEMPLATES[@]} -gt 0 ] || die "Unable to find a template when searching for '$TEMPLATE_SEARCH'."
+[ ${#TEMPLATES[@]} -gt 0 ] || exit "Unable to find a template when searching for '$TEMPLATE_SEARCH'."
 TEMPLATE="${TEMPLATES[-1]}"
 
 if ! pveam list $TEMPLATE_STORAGE | grep -q $TEMPLATE; then
   msg_info "Downloading LXC Template"
   pveam download $TEMPLATE_STORAGE $TEMPLATE >/dev/null ||
-    die "A problem occured while downloading the LXC template."
+    exit "A problem occured while downloading the LXC template."
   msg_ok "Downloaded LXC Template"
 fi
 
@@ -137,5 +128,5 @@ PCT_OPTIONS=(${PCT_OPTIONS[@]:-${DEFAULT_PCT_OPTIONS[@]}})
 
 msg_info "Creating LXC Container"
 pct create $CTID ${TEMPLATE_STORAGE}:vztmpl/${TEMPLATE} ${PCT_OPTIONS[@]} >/dev/null ||
-  die "A problem occured while trying to create container."
+  exit "A problem occured while trying to create container."
 msg_ok "LXC Container ${BL}$CTID${CL} ${GN}was successfully created."