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Filename : Example8
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#! /bin/sh
#
# This is a script from the smartmontools examplescripts/ directory.
# It can be used as an argument to the -M exec Directive in
# /etc/smartd.conf, in a line like
# ... -m root@localhost -M exec /path/to/this/file
#
# See also: smartd.conf(5), smartd(8).
#
# $Id: Example8 4937 2019-08-04 15:29:43Z chrfranke $

# Skip if '-m <nomailer>' is set
test -n "$SMARTD_ADDRESS" || exit 0

# Try mail[x]
for mailer in \
  $(which mail 2>/dev/null) \
  $(which mailx 2>/dev/null) \
  /usr/bin/mail \
  /usr/bin/mailx
do
  test -f "$mailer" || continue
  test -x "$mailer" || continue
  exec "$mailer" -s "${SMARTD_SUBJECT-[SMARTD_SUBJECT]}" $SMARTD_ADDRESS <<EOF
${SMARTD_FULLMESSAGE-[SMARTD_FULLMESSAGE]}
EOF
  exit $?
done

# Try sendmail
for sendmail in \
  /usr/sbin/sendmail \
  /usr/lib/sendmail
do
  test -f "$sendmail" || continue
  test -x "$sendmail" || continue
  exec "$sendmail" $SMARTD_ADDRESS <<EOF
Subject: ${SMARTD_SUBJECT-[SMARTD_SUBJECT]}
To: $(echo $SMARTD_ADDRESS | sed 's/ /, /g')

${SMARTD_FULLMESSAGE-[SMARTD_FULLMESSAGE]}
EOF
  exit $?
done

echo "$0: found none of 'mail', 'mailx' or 'sendmail'"
exit 1