#!/bin/bash

# DISCLAIMER   :   It is recomended to test this script on a test machine.
#                  ManageEngine will not be responsible for any damage/loss
#                  to the data/setup based on the behavior of the script.

# DESCRIPTION  :   Script to force user for changing password at next login in linux agent machines.
#
# ARGUMENT(S):
#  1) User for whom forcing password change.
#
#         ARGUMENT FORMAT: <user_name>
#         EXAMPLE        : test
#
#           RETURN VALUE                  MEANING
#
#                0             Forced password change successfully
#                1             Error while force password change
#                2             Invalid arguments.

# NOTE :
#   To see the script output, Kindly enable the option Enable logging in Troubleshooting while deploying configuration.

errorCode=2
euid=$(id -u)

for i in 1; do
  # check sudo access
  if [ $euid -ne 0 ]; then
    echo "This script must be run as root"
    break
  fi

  if [ $# -ne 1 ]; then
    echo "Incorrect Usage : Arguments mismatch."
    echo "Refer ARGUMENT(S) section in this script."
    break
  fi

  errorCode=0
  username=$1

  # check given user is exist or not
  IsUser=$(grep -c '^'$username':' /etc/passwd)

  if [ $IsUser -eq 0 ]; then
    echo "UserName : $username does not exist"
    errorCode=1
    break
  fi

  passwd --expire $username

  if [ $? -eq 0 ]; then
    echo "Forced password change successfully for user $username"
  else
    echo "Error while force password change : $username"
    errorCode=1
  fi
done

errorFunc() {
  return $errorCode
}
errorFunc