topic Re: script help in Operating System - HP-UX

script help

Khashru — Sun, 12 Feb 2006 18:02:38 GMT

Hi,

I am using the following two lines in one of my script

Enter user name
read NAME

I want to stop entering null value. If someone enters enter without giving character then i want to echo a warning.

Re: script help

Patrick Wallek — Sun, 12 Feb 2006 18:15:57 GMT

Something like this ought to work.....

if [[ ${NAME} = "" ]] ; then
echo "you must enter something"
fi

Re: script help

Hein van den Heuvel — Sun, 12 Feb 2006 20:54:16 GMT

How about:

/mnt/root # cat x
#!/bin/sh
a=""
while [ "${a}" = "" ]
do
echo -n "Please enter name : "
read a
done
echo "---> $a <----"

Please be sure to check some basic shell programming books of web pages.
Pretty much the very question you asked is answerred in one that popped up with google: +unix +sh +while:
http://steve-parker.org/sh/loops.shtml

hth,
Hein.

Re: script help

Muthukumar_5 — Mon, 13 Feb 2006 00:45:00 GMT

Use as,

echo "Enter User Name"
read NAME

if [[ -z ${NAME} ]]
then
echo "User name is null. Enter it."
fi

Re: script help

Arunvijai_4 — Mon, 13 Feb 2006 00:51:46 GMT

Enter user name
read NAME

while [ NAME = "" ]
do
echo -n "Its null, Enter a Name: "
read a
done

-Arun

Re: script help

Arturo Galbiati — Wed, 15 Feb 2006 04:07:29 GMT

Hi,
read NAME"?Enter user name "
if [[ -z $NAME ]] ; then
echo "you must enter something"
fi

HTH,
Art