Shell Programming and Scripting

echo "Please enter a job name (no spaces): "
read jobname
#  ***test not working*** while [`echo $jobname | egrep '(" "|"^$")' | wc -l -gt 0 ]; do
 
while [`echo $jobname | grep " " | wc -l -gt 0 ] || [`echo $jobname | grep "^$" | wc -l -gt 0 ]; do   # working
echo "Please enter a new job name (NO spaces): "
read jobname
done

while ! echo "x$jobname" | egrep '^x[^[:blank:]]+$' >/dev/null
do
 echo "Please enter a new job name (NO spaces): "
 read jobname
done

while ! echo "x$jobname" | egrep '^x[[:alnum:]]+$' >/dev/null

#! /bin/bash

echo "Enter job name:"
read x

while [ 1 ]
do
    echo $x | egrep -q "^$|^ *$"
    if [ $? -eq 0 ]
    then
        echo "No blank lines or spaces. Enter job name:"
        read x
    else
        break
    fi
done

echo $x

if [ -z "$VARTOTEST" ] || [ "$VARTOTEST" = " " ]
then
        echo "$VARTOTEST empty or one space"
fi

case "$VARTOTEST" in
) echo "blank" ;;
 ) echo "one space" ;;
*) echo "not blank" ;;
esac

VAR=""
case X in $VARTOTEST ; do VAR="$X" ; done
if [ -z "$VAR" ]
then
        echo "$VARTOTEST is blank, or one or more spaces"
fi

set -- $VARTOTEST

if [ -z "$1" ]
then
        echo "$VARTOTEST blank, or one or more spaces"
fi

while [`echo $jobname | grep " " | wc -l -gt 0 ] || [`echo $jobname | grep "^$" | wc -l -gt 0 ]; do  # working

while [`echo $jobname | grep " " | wc -l` -gt 0 ] || [`echo $jobname | grep "^$" | wc -l` -gt 0 ]; do  # working

while [`echo $jobname | egrep '^[^[:blank:]]+$' | wc -l -gt 0 ]; do