Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Getting user input from inside a while loop?
Top Forums UNIX for Dummies Questions & Answers Getting user input from inside a while loop? Post 302357079 by Azumandious on Monday 28th of September 2009 04:21:35 PM
Old 09-28-2009
Getting user input from inside a while loop?
I'm new to BASH and i'm trying to create a script which is simply put a large find and replace file. This is what I have so far


N=0
while read LINE ; do

N=$((N+1))

sed 's/'$2'/'$3'/g' $LINE > .temp
echo "Changes to file $N = $LINE"
echo 'The following changes will be made will be made to $LINE :'
diff .temp $LINE
echo 'Are you sure you want to make these changes? y/
readline a

if [[ $a == "N" || $a == "n" || $a == "No" || $a == "no" ]]; then
echo "No changes have been made to $LINE"
rm .tempfr

elif [[ $a == "Y" || $a == "y" || $a == "Yes" || $a == "yes" ]]; then

mv .tempfr $LINE
echo "The given changes have been made successfully"

else
echo $a "is not a recognized input. Please use y/n"

fi
rm .temp
done < $1



For this code the $1 is a file which is simply a list of files which need to be searched with this find and remove script. $2 is the word that i'm looking to find and $3 is the word i'm looking to replace it with. The problem that I seem to be having is that every time that I run this script it seems to skip the

read a

line, and assumes that the user put in no input. I'm worried that this has something to do with using two read commands but I don't exactly know what the problem would be. Does anyone know why it isn't allowing me to ask for user input from inside this while loop?
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

input inside while read loop

Hi all Does anyone have a script that will allow me to stop inside a while read loop. I want to pause the loop until a enter is pressed. e.g. While read line do echo something if LINECOUNT > 40 then read ENTER?"PRESS ENTER TO CONT..." ... (3 Replies)
Discussion started by: jhansrod
3 Replies

2. UNIX for Dummies Questions & Answers

read user input from within a wile loop that is being fed from below

hi! i need to do a ksh script that uses a wile loop that is fed form below while read line do some things done < myfile inside the while loop i need to read user input to ask the user what he wants to do, but "read" reads the file, and not the standard input while read line do ... (2 Replies)
Discussion started by: broli
2 Replies

3. Shell Programming and Scripting

Loop until user input is correct

Hello, i know how to retrieve a user input (read), and how to manage the different options (case statement). But... could anybody show me a script that, if the user option is incorrect, don't allow to continue the excution, i.e., if the value entered is not 1 or 2, the script shows a question. ... (2 Replies)
Discussion started by: aristegui
2 Replies

4. Shell Programming and Scripting

read command (input) inside the while loop

Hi, 'read' command is not working inside the while loop, How can I solve this? Rgds, Sharif. (2 Replies)
Discussion started by: sharif
2 Replies

5. Shell Programming and Scripting

matching user input to a text file loop?

until do read -p "Invalid cars. Try againa" cars1 done Ok i have the above code, im getting users input and if it doesnt match in the file the user has to try again untill its correct But when i run this it gives me an error saying ./Cars.bash: line 43: (2 Replies)
Discussion started by: gangsta
2 Replies

6. Shell Programming and Scripting

no chance to input passwd when create new user in loop

Hi Dears, I have one script to create new users with information in one plain text file. This script will read all lines in the file and create one users for one line. Sample file: #action;login,full name title,expire date,project +;gmwen,Bruce Wen QA,04/01/2012,BT +;xxdeng,Shown Deng... (4 Replies)
Discussion started by: crest.boy
4 Replies

7. Homework & Coursework Questions

How to read user keyboard input inside the case?

I need to Write a shell script that allows some system-administration tasks to be preformed automatically from a menu-driven interface. with automated following tasks: Copy directory tree Delete files or directories Output Information (this part is done ) *Copy directory tree The “Copy... (2 Replies)
Discussion started by: femchi
2 Replies

8. Shell Programming and Scripting

Loop breaks on yes/no user input

I have a shell script, and its pretty much done, I decided to add a loop that ends or continues depending on user input. like "would you like to continue?" and if I hit y or yes it will run the loop again until I hit n or no and breaks out of the loop. To be hones I didn't think I needed to add... (2 Replies)
Discussion started by: Demon_Jester
2 Replies

9. Shell Programming and Scripting

Unable to read user input inside a loop

Hi, This query is a part of a much more lengthy script. I wish to look for all the files in a folder named "data" which in this case has two files i.e. plan.war and agent.properties. For all the files found under data I wish to ask the user as to where they wish copy the files to. Below,... (14 Replies)
Discussion started by: mohtashims
14 Replies

10. Shell Programming and Scripting

Would like to check user input for letters within a loop

Hi All, #!/bin/bash #Just trying to check if letters are in the user input. Any tips? # I have tried regexp and using 0-9 etc, i cannot get this to work either in just an if statement or while in a loop. echo "Please pick a number" read num if ; then echo "Please enter a number"... (7 Replies)
Discussion started by: jvezinat
7 Replies

LEARN ABOUT SUSE

rnano

RNANO(1)						      General Commands Manual							  RNANO(1)

NAME

       rnano - Restricted mode for Nano's ANOther editor, an enhanced free Pico clone

SYNOPSIS

       rnano [OPTIONS] [[+LINE,COLUMN] FILE]...

DESCRIPTION

       This manual page briefly documents the rnano command.

       nano is a small, free and friendly editor which aims to replace Pico, the default editor included in the non-free Pine package. Rather than
       just copying Pico's look and feel, nano also implements some missing (or disabled by  default)  features  in  Pico,  such  as  "search  and
       replace" and "go to line and column number".

       rnano  is  a  restricted  version of nano, which only edits specific files and doesn't allow the user access to the filesystem or a command
       shell.

       In restricted mode, nano will not:

       o read or write to any file not specified on the command line;

       o read any nanorc files;

       o allow suspending;

       o allow a file to be appended to, prepended to, or saved under a different name;

       o use backup files or spell checking.

OPTIONS

       +LINE,COLUMN
	      Places cursor at line number LINE and column number COLUMN (at least one of which must be specified)  on	startup,  instead  of  the
	      default of line 1, column 1.

       -?     Same as -h (--help).

       -h (--help)
	      Show a summary of command line options and exit.

       -V (--version)
	      Show the current version number and exit.

       See the nano(1) manpage for the complete documentation of nano.

BUGS

       Please send any comments or bug reports to nano@nano-editor.org.

       The nano mailing list is available from nano-devel@gnu.org.

       To subscribe, email to nano-devel-request@gnu.org with a subject of "subscribe".

HOMEPAGE

       http://www.nano-editor.org/

AUTHOR

       Chris  Allegretta  <chrisa@asty.org>,  et  al  (see  AUTHORS  for  details).   This  manual  page was originally written by Thijs Kinkhorst
       <thijs@kinkhorst.com>, for the Debian system (but may be used by others).

August 23, 2007 						   version 2.0.0							  RNANO(1)
All times are GMT -4. The time now is 11:05 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy