Sends a message to all logged in users (permission to pts devices required)

gmessage.sh

#===============================================================================
#          FILE: gmessage.sh
#         USAGE: gmessage.sh <message> [sender]
#   DESCRIPTION: Sends a message to all logged in users (permission to pts devices required)
#       OPTIONS: `sender` is an optional arg, $USER is used otherwise
#  REQUIREMENTS: `toilet`, `lolcat`
#        AUTHOR: Jesse Portnoy <[email protected]>
#  ORGANIZATION: Packman.io
#       CREATED: 23/04/23 20:09:32 GMT
#      REVISION:  ---
#===============================================================================

if [ $# -lt 1 ];then
    echo "Usage: $0 <message> [sender]"
    exit 1
fi

SENDER=$USER
MSG=$1


if [ -n "$2" ];then
    SENDER=$2
fi

# `lolcat` often installs under /usr/games which is not always included in PATH
PATH=$PATH:/usr/games

# check that we have the needed binaries
for BINARY in toilet lolcat; do
    if [ ! "`which $BINARY 2>/dev/null`" ];then
	    echo "Need to install $BINARY."
	    exit 2
    fi
done



for DEV in `who|awk -F " " '{print $2}'|xargs`; do 
    echo -en "\n-----\n$MSG\n-- $SENDER" | toilet -f future.tlf -t | lolcat > /dev/$DEV
done