8.7.3.1. ...sending log messages to a program?
The standard Fedora syslog program does not support output to a program such as a mailer. However, you can easily write a script that reads a logfile using the tail command and outputs new log entries to a program.
This example emails log messages to a pager or cell phone text service:
#!/bin/bash
DESTINATION= [email protected]
tail -0f /var/log/messages|
while read LINE
do
echo $LINE|
mail $DESTINATION
done
To use this script, place it in the file / usr/local/bin/log-mail and add read and execute permissions:
# chmod u+rx /usr/local/bin/log-mail
# log-mail
You may want to use this script with a lower-volume logfile than /var/log/messages, especially if you pay for each pager message.
To filter messages by content, place a grep command between the tail and while lines in the script.
You can also have log output read to you over the system's speakers:
#!/bin/bash
logger -t log-speak "Starting log reading."
sleep 0.3
tail -1f /var/log/messages|
while read LINE
do
# The sed expressions remove the date/time and PIDs
# from messages to shorten the text.
echo $LINE|
sed -e "s/^.\{17\}[^ ]*//" -e "s/\[.*\]//g"|
festival --tts
done