topic help_for script in Operating System - HP-UX

help_for script

Soul_1 — Thu, 07 Jan 2010 12:23:48 GMT

Hi,

I wrote one script to print the first 5 numbers
I want to modify this script in such a way that
it should display 1 and then replace 1 with 2 and so on.Its just like a stop watch.

#
echo "assigning value"
Value=1
while ((Value <= 5))
do
echo $Value
((Value=Value+1))
done

Thanks in advance

Re: help_for script

James R. Ferguson — Thu, 07 Jan 2010 12:56:38 GMT

Hi Soul:

# cat ./timer
#!/usr/bin/sh
echo "assigning value"
Value=1
while ((Value <= 5))
do
echo "${Value}\b\c"
sleep 1
((Value=Value+1))
done
echo

Regards!

...JRF...

Re: help_for script

Soul_1 — Fri, 08 Jan 2010 06:01:31 GMT

Hi,

Its working fine...

can u tell me what "\b\c" will do ?

: )

Thanks in advance

Re: help_for script

Steven Schweda — Fri, 08 Jan 2010 06:05:41 GMT

> can u tell me what "\b\c" will do ?

man echo

Re: help_for script

R.K. # — Fri, 08 Jan 2010 06:08:01 GMT

Hi Soul,

>> can u tell me what "\b\c" will do ?
\c instructs command not to perform a carriage return after the out-put.
\b is for backspace

This is how the line will not change (\c) and the number will be over-written (\b).

Re: help_for script

Soul_1 — Fri, 08 Jan 2010 06:20:47 GMT

Hi,

When it comes to two digits ...its not displaying properly.when it reached two digits its displaying in one line.

Thanks in advance.

Re: help_for script

Steven Schweda — Fri, 08 Jan 2010 07:03:07 GMT

> When it comes to two digits ...its not
> displaying properly. [...]

Yes, one backspace character will not move
the cursor back two places. You might try
using two backspace characters in that case.

Have you ever used a typewriter? The
concepts here are similar.

> I wrote one script to print the first 5
> numbers

If you describe the actual problem which you
are trying to solve, then you may get better
(more appropriate) answers. Otherwise, if
you're the only one who knows what the actual
problem is, then you may need to do some
thinking for yourself.

Re: help_for script

Soul_1 — Fri, 08 Jan 2010 08:44:07 GMT

hi,

Please help me to print first 25 numbers.

Thanks & Regards

Re: help_for script

Dennis Handly — Fri, 08 Jan 2010 09:17:08 GMT

>When it comes to two digits

If the digits are at the beginning, you can use "\r" for a carriage return.

Re: help_for script

R.K. # — Fri, 08 Jan 2010 11:04:21 GMT

It is working after using \r
Little Interactive and edit as per Dennis:

# cat timer
#!/usr/bin/sh
echo "Enter a number for counting: \c"
read N
Value=1
while ((Value <= $N))
do
echo "${Value}\r\c" # use "r" here
sleep 1
((Value=Value+1))
done
echo

Thanks JRF and Dennis...a good learing for me as well :-)

Re: help_for script

James R. Ferguson — Fri, 08 Jan 2010 12:33:17 GMT

Hi (again):

As noted, the manpages (here, for 'echo') are you friend. They contain a wealth of information.

The use of the backspace (\b) is probably best seen in situations like this:

# cat ./reply
#!/usr/bin/sh
typeset -l REPLY
echo "Is this correct [y|n]? y\b\c"
read REPLY
if [ "${REPLY}" = "n" ]; then
echo "...then we won't do this..."
exit 1
fi
echo "...proceeding..."
exit 0

...Here, the cursor is positioned over the "y" with the expectation that the user can just hit the return/enter key to continue. If that's not what is wanted, the user can simply over-type a "n". The 'typeset -l' causes everything to be translated to lowercase letters so that one can freely use "n" or "N" or "Y" or "y".

Regards!

...JRF...

Re: help_for script

Soul_1 — Thu, 14 Jan 2010 05:19:35 GMT

Hi,

Thanks you all..

Re: help_for script

Soul_1 — Thu, 14 Jan 2010 05:20:24 GMT

Done