From 14039d9fe47933e27de016fc33c4e8d8122d0645 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Juan=20Carlos=20Mej=C3=ADas=20Rodr=C3=ADguez?=
 <juan.mejias@reduc.edu.cu>
Date: Sun, 25 Nov 2018 13:09:06 -0500
Subject: [PATCH] Redirected error messages to stderr

---
 psu | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/psu b/psu
index e3b8ca8..63222de 100755
--- a/psu
+++ b/psu
@@ -14,8 +14,8 @@ check_argument () {
   local argument_envvar=$3
   local argument_flag=$4
   if [ -z "$argument_value" ]; then
-    echo "Error: Missing argument \"$argument_name\"."
-    echo "Try setting \"$argument_envvar\" environment variable or using the \"-$argument_flag\" flag."
+    >&2 echo "Error: Missing argument \"$argument_name\"."
+    >&2 echo "Try setting \"$argument_envvar\" environment variable or using the \"-$argument_flag\" flag."
     exit 1
   fi
 }
@@ -31,12 +31,12 @@ check_for_errors () {
   local response=$2
   if [ $exit_code -ne 0 ]; then
     case $exit_code in
-        2) echo 'Request timed out!' ;;
-        3) echo 'Unexpected HTTP 3xx Redirection!' ;;
-        4) echo 'HTTP 4xx Client Error!' && echo $response ;;
-        5) echo 'HTTP 5xx Server Error!' && echo $response ;;
-        6) echo 'Exceeded --max-redirects=<n> redirects!' ;;
-        *) echo 'Unholy Error!' ;;
+        2) >&2 echo 'Request timed out!' ;;
+        3) >&2 echo 'Unexpected HTTP 3xx Redirection!' ;;
+        4) >&2 echo 'HTTP 4xx Client Error!' && echo $response ;;
+        5) >&2 echo 'HTTP 5xx Server Error!' && echo $response ;;
+        6) >&2 echo 'Exceeded --max-redirects=<n> redirects!' ;;
+        *) >&2 echo 'Unholy Error!' ;;
     esac
     exit 1
   fi
@@ -155,7 +155,7 @@ deploy () {
     rm json.tmp
   else
     if [ $STRICT_MODE == "true" ]; then
-      echo "Error: Stack $PORTAINER_STACK_NAME already exists."
+      >&2 echo "Error: Stack $PORTAINER_STACK_NAME already exists."
       exit 1
     fi
     echo_verbose "Stack $PORTAINER_STACK_NAME exists."
@@ -192,7 +192,7 @@ deploy () {
 undeploy () {
   if [ -z "$STACK" ]; then
     if [ $STRICT_MODE == "true" ]; then
-      echo "Error: Stack $PORTAINER_STACK_NAME does not exist."
+      >&2 echo "Error: Stack $PORTAINER_STACK_NAME does not exist."
       exit 1
     else
       echo_verbose "Stack $PORTAINER_STACK_NAME does not exist. No need to undeploy it."
@@ -309,5 +309,5 @@ if [ $ACTION == "undeploy" ]; then
   exit 0
 fi
 
-echo "Error: Unknown action \"$ACTION\"."
+>&2 echo "Error: Unknown action \"$ACTION\"."
 exit 1