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https://bro-tracker.atlassian.net/browse/BIT-1232?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17600#comment-17600
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Jon Siwek commented on BIT-1232:
--------------------------------
{quote}
root@lubuntu:/exercises/BroCon14/analyzers# bro -e "GridFTP::size_threshold =
1000;"
error in <command line>, line 1: const is not a modifiable lvalue
(GridFTP::size_threshold)
{quote}
Yes, that's correct behavior because the variable is const w/ &redef and so can
only be re-assigned via redef.
{quote}
and then to do it right...
root@lubuntu:/exercises/BroCon14/analyzers# bro -e "redef
GridFTP::size_threshold = 1000;"
internal warning in <command line>, line 1: Can't document redef of
GridFTP::size_threshold, lookup of <command line> failed
Neither work.
{quote}
This way does work -- it emits a warning not an error. The warning isn't
anything to worry about, so I'll work on silencing that since there's nothing
wrong about what you're doing here.
{quote}
However...
root@lubuntu:/exercises/BroCon14/analyzers# bro "GridFTP::size_threshold=1000"
root@lubuntu:/exercises/BroCon14/analyzers# cat blah.bro
redef GridFTP::size_threshold = 1000;
root@lubuntu:/exercises/BroCon14/analyzers# bro blah.bro
root@lubuntu:/exercises/BroCon14/analyzers#
All fine. The redef from the command line is the interesting part.
{quote}
Yeah, that's an alternative/convenience way to implicitly supply redefs via the
command line (arbitrary code would need to use -e, but "identifier=expr"
arguments on the command line are treated as if you mean to do a redef).
> Command line script execution has limitations
> ---------------------------------------------
>
> Key: BIT-1232
> URL: https://bro-tracker.atlassian.net/browse/BIT-1232
> Project: Bro Issue Tracker
> Issue Type: Problem
> Components: Bro
> Affects Versions: 2.3
> Reporter: Tim Yardley
>
> root@lubuntu:/exercises/BroCon14/analyzers# bro -e "GridFTP::size_threshold =
> 1000;"
> error in <command line>, line 1: const is not a modifiable lvalue
> (GridFTP::size_threshold)
> and then to do it right...
> root@lubuntu:/exercises/BroCon14/analyzers# bro -e "redef
> GridFTP::size_threshold = 1000;"
> internal warning in <command line>, line 1: Can't document redef of
> GridFTP::size_threshold, lookup of <command line> failed
> Neither work.
> However...
> root@lubuntu:/exercises/BroCon14/analyzers# bro "GridFTP::size_threshold=1000"
> root@lubuntu:/exercises/BroCon14/analyzers# cat blah.bro
> redef GridFTP::size_threshold = 1000;
> root@lubuntu:/exercises/BroCon14/analyzers# bro blah.bro
> root@lubuntu:/exercises/BroCon14/analyzers#
> All fine. The redef from the command line is the interesting part.
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