On Friday 12 September 2008, Adam wrote:
> I pared down a bash script to the minimum that still has a problem:
>
> [EMAIL PROTECTED] ~]$ cat d
> #!/bin/bash
> CONTENTS="xyz"
> N=1
> echo "$CONTENTS" | while read LINE ; do
> N=4
> echo N = $N
> done
> echo N is now $N
>
> [EMAIL PROTECTED] ~]$ ./d
> N = 4
> N is now 1
> [EMAIL PROTECTED] ~]$
>
> How come N returns to its original value when the 'while' loop ends?
> How can I get it to keep its new value? Adding "export N" inside the
> loop made no difference. Thanks, anybody!
This is a problem I've run into relatively often, and there's a workaround
that you can use by capturing output of the prior shell into a variable in
the current shell:
#!/bin/bash
CONTENTS="xyz"
N=1
N=$(echo "$CONTENTS" | while read LINE ; do
N=4
echo $N
done)
echo N is now $N
Running the above results in:
N is now 4
-- Chris
--
Chris Knadle
[EMAIL PROTECTED]
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