#!/bin/sh

ROOT_UID=0      # Only users with $UID 0 have root privileges.
E_NOTROOT=67    # Non-root exit error.

# Run as root, of course.
if [ "$UID" -ne "$ROOT_UID" ]; then
  echo "Must be root to run this script."
  exit $E_NOTROOT
fi

# For each human user USER of the system, ensure that the user has no .netrc file. The command:
#  ls -l /home/USER/.netrc
# should return the error “No such file or directory”. If any user has such a file, approach that user to discuss
# removing this file.
# The .netrc file is a configuration file used to make unattended logins to other systems via FTP. When this file
# exists, it frequently contains unencrypted passwords which may be used to attack other systems.

ls -l /home/*/.netrc 2>/dev/null | (cat <<EOF
This is an automated report of $0 on the server `hostname -s`.

ls -l /home/*/.netrc
EOF
cat
) | /bin/mail -s "[Ensure that Users do not Have .netrc Files]" root