redirect failure output to stderr

bash/templates/template.sh

@@ -13,7 +13,7 @@ declare -r HELP_MSG="Usage: $SCRIPT_NAME [OPTION]... [ARG]...
 
 #=== FUNCTIONS ================================================================#
 
-## Print colored messages
+# Print colored messages
 _cmsg() {
 	case "$1" in
 		black)		COLOR="\033[0;30m" ;;
@@ -37,13 +37,13 @@ _cmsg() {
 	printf "${COLOR}${2}\33[0m\n"
 }
 
-## exit the shell(default status code: 1) after printing the message to stderr
+# exit the shell(default status code: 1) after printing the message to stderr
 _bail() {
-    echo -ne "$1" >&2
+    >&2 echo -ne "$1"
     exit ${2-1}
 } 
 
-## print the usage and exit the shell(default status code: 2)
+# print the usage and exit the shell(default status code: 2)
 _usage() {
     local status=2
     if [[ "$1" =~ ^[0-9]+$ ]]; then
@@ -53,10 +53,11 @@ _usage() {
     _bail "${1}$HELP_MSG" $status
 }
 
+# print fancy error message
 _failure() {
   local lineno=$1
   local msg=$2
-  echo "Failed at $lineno: $msg"
+  >&2 echo "Failed at $lineno: $msg"
 }
 
 #=== SET ENVIRONMENT AND EXIT CONDITIONS ======================================#
@@ -91,7 +92,7 @@ done
 shift $OPTIND
 [[ "$#" -lt 1 ]] && usage "Too few arguments\n"
 
-#=== MAIN CODE BELOW ==========================================================#
+#=== MAIN CODE GOES HERE ======================================================#
 
 echo "Start!"