Sponsored Content
Full Discussion: Reading numbers thru shell
Top Forums Shell Programming and Scripting Reading numbers thru shell Post 302307014 by spetneaz on Tuesday 14th of April 2009 11:22:32 AM
Old 04-14-2009
read integer 2>/dev/null

until [[ $integer = +([0-9]) ]]
do
read integer 2>/dev/null
done
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

retain Line numbers.. in Vi .. OR .. A SHELL SCRIPT

Hello everybody ! GOT SOMETHING INTERESTING... I am trying to retain line number for a text document.. usually we get line numbers in VI using :set nu , but I want to permanently store them. It's a 4000 lines of text and I want grep/search it for a list of words/fields stored in a different... (2 Replies)
Discussion started by: sdlayeeq
2 Replies

2. Shell Programming and Scripting

add numbers in shell script

cat dailyreports | grep "Important list" | awk -F":" '{print $2}' | awk -F" " '{print $1}' hey guys, after running the above combination of cat and awk, i get the below output: 3 4 2 9 now, i need to add these numbers up all in one line. i dont know what to add to that cat and awk one... (2 Replies)
Discussion started by: Terrible
2 Replies

3. UNIX for Dummies Questions & Answers

Reading a file in C shell

I recently started working in c shell and I am embarrassed to say I can't get a single read using while command to work while read line do print $line done < list.txt Can somebody help. I need a solution specific to C shell. The error I get is "while: Expression Syntax." (3 Replies)
Discussion started by: paruthiveeran
3 Replies

4. UNIX for Dummies Questions & Answers

How to Convert Strings into Numbers under C-Shell?

I tried something like: set test3 = (4.985e-10 5.130e-10 5.486e-10 6.023e-10 7.015e-10) set test4 = (4.869e-10 5.010-10 5.363e-10 5.895e-10 6.887e-10) set test5 = $test3 - $test4 but this doesn't seem to work. And then I tried: @ test5 = $test3 - $test4 This doesn't seem to work... (8 Replies)
Discussion started by: EDALBNUG
8 Replies

5. Shell Programming and Scripting

reverse ':' separated numbers in a shell script

I want to reverse a the following: 00:11:22:33:44:55 I currently use something like below to pass it as is. But now I want the same script to reverse the above and pass it to ethtool. // psuedo code i=0 skip=0 for m in $@ do if then skip=1 ... (1 Reply)
Discussion started by: bhanu.nani
1 Replies

6. Shell Programming and Scripting

Shell script to check numbers!

Hello All, I have 3 types of files. The names of which starts with P,I,M like P********* D********* M********* now I need to do some operations witht hese files.. so if file name starts with P or p then do the operation for P file... fi else (20 Replies)
Discussion started by: smarty86
20 Replies

7. Shell Programming and Scripting

How is shell reading this?

Morning (or evening) all. I have some code: tput cup 21 1 ; echo "Press ENTER to continue. . . " read prompt Nowhere do I see "prompt" define. How is shell reading prompt? I'm so used to writing code in SAS, COBOL, etc where everything has to be defined. Thank you (2 Replies)
Discussion started by: Ccccc
2 Replies

8. Shell Programming and Scripting

Reading a table from shell

i want to do something like this from shell, for any user without having to enter any passwords i want to store the value in the option_value column into a variable select option_value from `$databasename`.`wp_options` where option_name="template"; what is the command i should use? ... (0 Replies)
Discussion started by: vanessafan99
0 Replies

9. Shell Programming and Scripting

Using Fractional Numbers in Shell Variables

Hello everyone, Before I state my problem I would like to inform you that this is not an assignment. I'm just trying to learn some shell programming in my free time. I'm trying to write a parking fee calculator. But I don't seem to be able to use fractional numbers. Could you please advice... (6 Replies)
Discussion started by: iwant2learn
6 Replies

10. Shell Programming and Scripting

Floating Point Numbers in c shell!

I have started using bash but this script which I am working on it, is in c chell. So here is my simple problem: set x = 0.4124\0.234 echo $x 0.4124.0.234 Same operation in Bash gives me correct result in my terminal. So there is something with my c shell that is causing this behaviour.... (8 Replies)
Discussion started by: dixits
8 Replies
ATF-SH(1)						    BSD General Commands Manual 						 ATF-SH(1)

NAME
atf-sh [-s shell] -- interpreter for shell-based test programs SYNOPSIS
atf-sh script DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library. atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter- preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not use any non-standard extensions. The following options are available: -s shell Specifies the shell to use instead of the value provided by ATF_SHELL. ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes. ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes. ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a specific interpreter. EXAMPLES
Scripts using atf-sh(3) should start with: #! /usr/bin/env atf-sh Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode the path to atf-sh in the script and then use the -s option afterwards as a single parameter: #! /path/to/bin/atf-sh -s/bin/bash ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts. SEE ALSO
atf-sh(3) BSD
September 27, 2014 BSD
All times are GMT -4. The time now is 01:44 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy