topic Re: [ How to make script to read inputs from a file ] in Operating System - Linux

[ How to make script to read inputs from a file ]

madhavabk — Mon, 03 Oct 2005 23:05:55 GMT

Hi all,

I have script which has no support for inputs from a file. But i use script with same values all the time.
Hence i would like to put all my answers for all queries of script in a file and want to supply it.

What is the best way to do this, with minimum changes. I would like to know is it possible to close file handle and duplicate stdin for my file.

Thanks,
Madhava

Re: [ How to make script to read inputs from a file ]

A. Clay Stephenson — Mon, 03 Oct 2005 23:14:30 GMT

Couldn't be simpler:

myscript.sh < myinputfile.txt

Re: [ How to make script to read inputs from a file ]

Rajeev Shukla — Mon, 03 Oct 2005 23:17:53 GMT

Use while loop

while read i
do
myscript $i
done

Re: [ How to make script to read inputs from a file ]

madhavabk — Mon, 03 Oct 2005 23:27:55 GMT

Hi Clay Stephenson,

If i redirect input from a file will the script understand the format or we need to take care of checking each entry?

My doubt is if i put all responses on seperate lines will script parses it correctly and gives inputs to queries in script.

Thanks,
Madhava

Re: [ How to make script to read inputs from a file ]

Arunvijai_4 — Mon, 03 Oct 2005 23:34:14 GMT

Yes, You can do that, shell reads line by line.

-Arun

Re: [ How to make script to read inputs from a file ]

madhavabk — Tue, 04 Oct 2005 00:12:33 GMT

Hi,

I am getting problem with script during only password reading portion.

Other than script is able to read line by line for each input required.

Thanks,
Madhava

Re: [ How to make script to read inputs from a file ]

Arunvijai_4 — Tue, 04 Oct 2005 00:26:21 GMT

If possible, can you post your script ? We shall take a look at it and modify .. What kind of problem you are facing in password reading portion ?

-Arun

Re: [ How to make script to read inputs from a file ]

RAC_1 — Tue, 04 Oct 2005 00:28:52 GMT

what password it asks?? Is that system related?? You may use expect tool for it.

Re: [ How to make script to read inputs from a file ]

Muthukumar_5 — Tue, 04 Oct 2005 00:40:04 GMT

A simplest way is as,

--- configuration.ksh ----
name=madhavbk
day="Oct 5"

--- script.ksh ---
. ./configuration.ksh
echo $name
echo $day

.

It is like a header file inclusion in ksh scripting.

hth.

Re: [ How to make script to read inputs from a file ]

madhavabk — Tue, 04 Oct 2005 06:07:01 GMT

Hi all,

For all password requests when there is echo off for stty script is not reading password from file.
All other entries it is taking correctly.

Any clues.

Following is the error message.

stty: : Not a typewriter

Thanks,
Madhava

Re: [ How to make script to read inputs from a file ]

Muthukumar_5 — Tue, 04 Oct 2005 06:10:28 GMT

Refer this:

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=891850

hth.

Re: [ How to make script to read inputs from a file ]

Arunvijai_4 — Tue, 04 Oct 2005 06:11:58 GMT

Can you check this doc,
http://docs.hp.com/en/B2355-90046/ch21s04.html
[Shells: User's Guide > Chapter 21. Basic Shell Programming Data Input and Output]

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=944865
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=35433

-Arun

Re: [ How to make script to read inputs from a file ]

Muthukumar_5 — Tue, 04 Oct 2005 06:12:20 GMT

Are you running this script in batch mode with /etc/profile or .profile. So that it will make that. Try to add that script with profile itself. Refer more,

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=72142

hth.

Re: [ How to make script to read inputs from a file ]

RAC_1 — Tue, 04 Oct 2005 06:21:49 GMT

Just before stty -echo statement, you may put this code and try.

The error is because, it expacts ainteractive terminal and it does not get one.

if tty -s
then
INTERACTIVE=/sbin/true
else
INTERACTIVE=/sbin/false
fi

Re: [ How to make script to read inputs from a file ]

A. Clay Stephenson — Tue, 04 Oct 2005 09:30:47 GMT

It's those little details you fail to mention...

Reading passwords really has nothing to do with echo off or on. It depends on which passwords you are trying to read and what routines are actually being used but in almost all cases, stdin is not the source of input for the password read. Those are almost always read using another file descriptor. In general, you must use a tool like expect (which does handle multiple file descriptors) to process complicated password entry. You can get expect from any of the HP-UX Porting Centre's.