bash: echo something to right end of window (right aligned)

Question

I am looking for producing success/fail messages which are right aligned in bash. An example would be what apache2 produces on executing: sudo /etc/init.d/apache2 relo

Answer 1

Here is something mostly based on the centos 'functions' script, but more stripped down

#!/bin/bash

RES_COL=60
MOVE_TO_COL="printf \\033[${RES_COL}G"

DULL=0
BRIGHT=1

FG_BLACK=30
FG_RED=31
FG_GREEN=32
FG_YELLOW=33
FG_BLUE=34
FG_MAGENTA=35
FG_CYAN=36
FG_WHITE=37

ESC="^[["
NORMAL="${ESC}m"
RESET="${ESC}${DULL};${FG_WHITE};${BG_NULL}m"

BLACK="${ESC}${DULL};${FG_BLACK}m"
RED="${ESC}${DULL};${FG_RED}m"
GREEN="${ESC}${DULL};${FG_GREEN}m"
YELLOW="${ESC}${DULL};${FG_YELLOW}m"
BLUE="${ESC}${DULL};${FG_BLUE}m"
MAGENTA="${ESC}${DULL};${FG_MAGENTA}m"
CYAN="${ESC}${DULL};${FG_CYAN}m"
WHITE="${ESC}${DULL};${FG_WHITE}m"

SETCOLOR_SUCCESS=$GREEN
SETCOLOR_FAILURE=$RED
SETCOLOR_NORMAL=$RESET

echo_success() {
  $MOVE_TO_COL
  printf "["
  printf $SETCOLOR_SUCCESS
  printf $"  OK  "
  printf $SETCOLOR_NORMAL
  printf "]"
  printf "\r"
  return 0
}

echo_failure() {
  $MOVE_TO_COL
  printf "["
  printf $SETCOLOR_FAILURE
  printf $"FAILED"
  printf $SETCOLOR_NORMAL
  printf "]"
  printf "\r"
  return 1
}

action() {
  local STRING rc

  STRING=$1
  printf "$STRING "
  shift
  "$@" && echo_success $"$STRING" || echo_failure $"$STRING"
  rc=$?
  echo
  return $rc
}

action testing true
action testing false