Shell Programming in Unix, Linux and OS X, Fourth Edition (shannon powell's Library) by Stephen G. Kochan & Patrick Wood

Author:Stephen G. Kochan & Patrick Wood
Language: eng
Format: epub
Publisher: Addison-Wesley Profressional
Published: 2017-03-14T16:00:00+00:00

# Set up default values

mailopt=FALSE

interval=60

# process command options

while getopts mt: option

do

case "$option"

in

m) mailopt=TRUE;;

t) interval=$OPTARG;;

\?) echo "Usage: waitfor [-m] [-t n] user"

echo " -m means to be informed by mail"

echo " -t means check every n secs."

exit 1;;

esac

done

# Make sure a user name was specified

if [ "$OPTIND" -gt "$#" ]

then

echo "Missing user name!"

exit 2

fi

shiftcount=$((OPTIND – 1))

shift $shiftcount

user=$1

#

# Check for user logging on

#

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