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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