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deleting the part of the file(overwrite) using start and end point

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Top Forums Shell Programming and Scripting deleting the part of the file(overwrite) using start and end point
# 29  
Old 12-15-2011
oh does it mean like a sub thread in main thread.... or the scope of the variable dude to different shells..?
# 30  
Old 12-15-2011
Quote:
Originally Posted by mirni
This is not an issue with bash. Once you understand that the pipe launches a subshell, it comes as obvious that the parent shell does not know what the subshell did to its variable.
The behaviour is not same in ksh.

Code:
#!/bin/ksh
var=123;
echo $var
echo $var | while read line
do
  var=456
  echo $var
done
echo $var
 
[root@bt]./run
123
456
456

Code:
#!/bin/bash
var=123;
echo $var
echo $var | while read line
do
  var=456
  echo $var
done
echo $var
 
[root@bt]./run
123
456
123

--ahamed
These 2 Users Gave Thanks to ahamed101 For This Post:
mirni vivek d r
# 31  
Old 12-15-2011
Thanks everyone.. i finally completed the code.. :-) woudlnt have done without the help from all you guys.. thanks again :-)
Last edited by vivek d r; 02-07-2012 at 05:15 AM..
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