man sh
... you are using single quotes (whose contents are not evalated by
the shell) try using double quotes.
tethereal -r $CAPTURE_FILE -z sip,stat,"ip.src==$IP_SRC"
or
tethereal -r $CAPTURE_FILE -z sip,stat,'ip.src=='$IP_SRC
or again
tethereal -r $CAPTURE_FILE -z sip,stat,ip.src==$IP_SRC
(there should not be spaces in $IP_SRC)
On 9/27/05, jlee@xxxxxxxxxxxxxxx <jlee@xxxxxxxxxxxxxxx> wrote:
> Hi –
>
> I am using tethereal in a shell script to filter a capture file. I would like to use a shell variable as part of the display filter, as in the following:
>
> IP_SRC= xxx.xxx.xxx.xx
> ....
> tethereal -r $CAPTURE_FILE -z sip,stat,'ip.src==$IP_SRC'
>
> When I run the script the value for $IP_SRC is not substituted correctly in the filter.
>
> Is there a correct syntax for using a variable in the filer string?
>
> Thanks
> JLee
>
>
>
>
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