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Top Forums Shell Programming and Scripting Bourne Shell - Problem with while loop variable scope. Post 302476444 by Corona688 on Wednesday 1st of December 2010 04:43:25 PM
Old 12-01-2010
Code:
#!/bin/sh

# substitute with last $username > /tmp/$$ on your system
cat > /tmp/$$ <<EOF
richards pts/4 s0106002215952e5 Wed Dec 1 14:04 still logged in
richards sshd s0106002215952e5 Wed Dec 1 14:04 still logged in
richards pts/4 s0106002215952e5 Wed Dec 1 12:02 - 13:03 (01:01)
richards sshd s0106002215952e5 Wed Dec 1 12:02 - 13:03 (01:01)
richards pts/3 s0106002215952e5 Tue Nov 30 21:29 - 23:28 (01:58)
richards sshd s0106002215952e5 Tue Nov 30 21:29 - 23:28 (01:58)
EOF

LOGINS=0
TOTALTIME=0

while read NAME T SESSION DAYNAME MON DAY TIMESTART DASH TIMEEND DURATION
do
	# Don't count SSH sessions
	[ "$T" == "sshd" ] && continue
	# Skip logged-in sessions
	[ "$DASH" == "still" ] && continue

	((LOGINS++))

	DURATION=${DURATION/(/}
	DURATION=${DURATION/)/}
	IFS=":" read HOURS MINS <<< "$DURATION"

	# Turn 05 into 105, so it doesn't think it's octal, ugh
	HOURS="1${HOURS}"
	MINS="1${MINS}"

	(( TOTALTIME += ((HOURS-100)*60)+(MINS-100) ))
done < /tmp/$$

HOURS=$((TOTALTIME/60))
MINS=$((TOTALTIME%60))

if [ "${HOURS}" -ge 1 ]
then
        echo "user logged in ${LOGINS} times for over an hour"
else
        echo "user logged in for ${MINS} minutes"
fi

rm -f /tmp/$$

 

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uudemon(4)						     Kernel Interfaces Manual							uudemon(4)

NAME
uudemon.admin, uudemon.cleanu, uudemon.hour, uudemon.poll - Administrative shell scripts for polling remote systems, cleaning up spool directories, reporting status to the system administrator, and routine invocations of the uuxqt and uusched daemons SYNOPSIS
These shell scripts reside in the following directory: /usr/lib/uucp DESCRIPTION
All the scripts can be run from the command line or can be run automatically by the cron daemon. To automatically run the scripts, remove the comment character (#) from the beginning of the relevant line in the /var/spool/cron/crontabs/uucp file. This script reports status to the system administrator. It issues the uustat command to find out the status of uucp jobs. It mails the results to the uucp login ID. The script may be modified to send mail to any login ID such as the uucp administrative login ID (uucpa) or root. This script cleans up the /var/spool/uucp and /var/spool/uucppublic directories by running the uucleanup command. The uucleanup com- mand is run with the following parameters: -C7, -D7, X2, -o2, -W1. This script runs the uusched and uuxqt daemons in the background. This script polls the systems listed in the /usr/lib/uucp/Poll file. The uudemon.poll script should be scheduled before the uudemon.hour script. This allows uudemon.poll to create any command files before cron runs the uudemon.hour script. FILES
Contains the uudemon.admin, uudemon.cleanu, uudemon.hour and uudemon.poll files. Contains the uucp file. RELATED INFORMATION
Commands: cron(8), uucleanup(8), uusched(8), uuxqt(1) Files: /usr/lib/uucp delim off uudemon(4)
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