Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Take variable outside while loop
Top Forums Shell Programming and Scripting Take variable outside while loop Post 302907013 by CarloM on Wednesday 25th of June 2014 09:57:20 AM
Old 06-25-2014
Your while is running in a subshell.

That's a useless use of cat anyway:
Code:
while read entry
do
        var=`echo $entry`
        echo $var
done < /root/nums

or if you want to do something a little more complex than cating a file, you could use process substitution:
Code:
while read entry
do
        var=`echo $entry`
        echo $var
done < <(grep something somefile)

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

variable in a for loop

Hi... i am trying to ping my servers .The hostnames are present in a file .They are separated by spaces in the file . i am doing the following : a=1 for name in $(cat host2 |cut -d" " -f$a) do echo Pinging server $name ping -c5 $name a=$a+1 done It is... (3 Replies)
Discussion started by: sars
3 Replies

2. Shell Programming and Scripting

loop through variable

i have these data in a variable "$test" BUNGA TERATAI 3 5055 ITH 1 1 JADE TRADER 143W ITH 4 4 MOL SPLENDOR 0307A ITH 3 3 the red coloured are the ones that i want to take and compare what I need to do is to take out the red coloured and then compare to another variable, if same then... (0 Replies)
Discussion started by: finalight
0 Replies

3. Shell Programming and Scripting

For loop Variable

Hi, Is it possible to assign one variable to other. eg. v1="table1" v2="20000" I want table1 to assign 20000 table1=20000 Is there any way? Thanks (2 Replies)
Discussion started by: SushilM
2 Replies

4. Shell Programming and Scripting

Help with variable using loop

Hi I have webserver that I do read data from. Data are stored like this: Huston |1 Portland |2 Hazen |1 Minneapolis |4 Albany |1 Pittsburg |1 Albany |1 Huston |1 Portland|1 Hazen |2 Albany |2 Huston |1 Hazen |1 Script #!/bin/sh user="admin" (1 Reply)
Discussion started by: Jotne
1 Replies

5. Shell Programming and Scripting

For loop with one variable as the name of other

Hello all, I find it hard to explain what I need so I will post the code OVZINCLUDE="16810 16811 1689" PLUS_16810="test" PLUS_16811="test" for VPS in $OVZINCLUDE do echo "Dumping VPSes: $OVZINCLUDE " vzdump --compress --snapshot ${PLUS_$VPS} $VPS done ... (2 Replies)
Discussion started by: click
2 Replies

6. Shell Programming and Scripting

[SHELL: /bin/sh] For loop using variable variable names

Simple enough problem I think, I just can't seem to get it right. The below doesn't work as intended, it's just a function defined in a much larger script: CheckValues() { for field in \ Group_ID \ Group_Title \ Rule_ID \ Rule_Severity \ ... (2 Replies)
Discussion started by: Vryali
2 Replies

7. Shell Programming and Scripting

printing variable with variable suffix through loop

I have a group of variables myLINEcnt1 - myLINEcnt10. I'm trying to printout the values using a for loop. I am at the head banging stage since i'm sure it has to be a basic syntax issue that i can't figure out. For myIPgrp in 1 2 3 4 5 6 7 8 9 10; do here i want to output the value of... (4 Replies)
Discussion started by: oly_r
4 Replies

8. UNIX for Dummies Questions & Answers

Loop and variable not exactly variable: what's wrong

Hello guys, This truly is a newbie question. I'm trying to make a loop to execute simultaneous commands indefinitely while using variable. Here is how my mess looks like (this is just an example): #!/bin/bash IP=`shuf -n 1 IP.txt` # I figured this would be easier to select random lines... (4 Replies)
Discussion started by: bobylapointe
4 Replies

9. Shell Programming and Scripting

Array Variable being Assigned Values in Loop, But Gone when Loop Completes???

Hello All, Maybe I'm Missing something here but I have NOOO idea what the heck is going on with this....? I have a Variable that contains a PATTERN of what I'm considering "Illegal Characters". So what I'm doing is looping through a string containing some of these "Illegal Characters". Now... (5 Replies)
Discussion started by: mrm5102
5 Replies

10. Shell Programming and Scripting

[Solved] How to increment and add variable length numbers to a variable in a loop?

Hi All, I have a file which has hundred of records with fixed number of fields. In each record there is set of 8 characters which represent the duration of that activity. I want to sum up the duration present in all the records for a report. The problem is the duration changes per record so I... (5 Replies)
Discussion started by: danish0909
5 Replies

LEARN ABOUT SUNOS

continue

break(1)							   User Commands							  break(1)

NAME

       break, continue - shell built-in functions to escape from or advance within a controlling while, for, foreach, or until	loop

SYNOPSIS

   sh
       break [n]

       continue [n]

   csh
       break

       continue

   ksh
       *break [n]

       *continue [n]

DESCRIPTION

   sh
       The break utility exits from the enclosing for or while loop, if any. If n is specified, break n levels.

       The continue utility resumes the next iteration of the enclosing for or while loop. If n is specified, resume at the n-th enclosing loop.

   csh
       The  break  utility  resumes  execution after the end of the nearest enclosing foreach or while loop. The remaining commands on the current
       line are executed. This allows multilevel breaks to be written as a list of break commands, all on one line.

       The continue utility continues execution of the next iteration of the nearest enclosing while or foreach loop.

   ksh
       The break utility exits from the enclosed for, while, until, or select loop, if any. If n is specified,	then  break  n	levels.  If  n	is
       greater than the number of enclosing loops, the outermost enclosing loop shall be exited.

       The  continue utility resumes the next iteration of the enclosed for, while, until, or select loop. If n is specified then resume at the n-
       th enclosed loop. If n is greater than the number of enclosing loops, the outermost enclosing loop shall be used.

       On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:

       1.  Variable assignment lists preceding the command remain in effect when the command completes.

       2.  I/O redirections are processed after variable assignments.

       3.  Errors cause a script that contains them to abort.

       4.  Words that follow a command preceded by ** that are in the format of a variable assignment are expanded with the same rules as a  vari-
	   able  assignment.  This means that tilde substitution is performed after the = sign, and also that word splitting and file name genera-
	   tion are not performed.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       csh(1), exit(1), ksh(1), sh( 1), attributes(5)

SunOS 5.10							    17 Jul 2002 							  break(1)
All times are GMT -4. The time now is 07:32 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy