datecheck

#!/bin/bash
# This script is a little ditty I modified to basically output something to the terminal screen every couple of seconds.
# It was origianlly developed to defeat ssh timeouts for long-running sessions.
# It relies heavily on tput and stty to get and set your terminal position, and on magic.
# If you have questions, I won't know how to answer them.
#
# Usage:  me [ commmand ]
# Generally, it provides a rotating -\|/ spinner and the current date to be displayed in the upper right corner of the screen, refreshed every 3 seconds.
# You can override the default command from `date` to something else, but not that this won't work for complex commands at all.
#set -x
#set -v

ctrlc() {
  tput cup "$row" "$col"
  exit 0
}

getcurrent() {
  # Get current position, stored in $row and $col.  HORRIBLE hack, gotten from
  # http://stackoverflow.com/questions/2575037/how-to-get-the-cursor-position-in-bash
  exec < /dev/tty
  oldstty=$(stty -g)
  stty raw -echo min 0
  echo -en "\033[6n" > /dev/tty
  IFS=';' read -r -d R -a mypos
  stty "$oldstty"
  # change from one-based to zero based so they work with: tput cup $row $col
  row=$((${mypos[0]:2} - 1))    # strip off the esc-[
  col=$((mypos[1] - 1))
}

getposition () {
  cmdchk=$($cmd)
  padding=3
  pos=$((cols-${#cmdchk}-padding))
}

getcurrent

i=1
sp="-\|/"
cols=$(tput cols)
cmd="date"
if [ -n "$1" ] ; then
  cmd="$*"
fi

trap ctrlc SIGINT
while true ;
do
  # Calculate where I want the check to be
  getposition
  tput cup 0 "$pos"
  printf '%s' "$blanks"
  tput cup 0 "$pos"
  printf ' %s %s' "${sp:i++%${#sp}:1}" "$($cmd)"
  blanks=$(printf ' %s %s' "${sp:i++%${#sp}:1}" "$($cmd)" | sed 's/./ /g')
  sleep 3
  i=$((i % ${#sp}))
done
ctrlc