zeek/scripts/policy/misc/trim-trace-file.zeek
Jon Siwek a994be9eeb Merge remote-tracking branch 'origin/topic/seth/zeek_init'
* origin/topic/seth/zeek_init:
  Some more testing fixes.
  Update docs and tests for bro_(init|done) -> zeek_(init|done)
  Implement the zeek_init handler.
2019-04-19 11:24:29 -07:00

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##! Deletes the ``-w`` tracefile at regular intervals and starts a new file
##! from scratch.
module TrimTraceFile;
export {
## The interval between times that the output tracefile is rotated.
const trim_interval = 10 mins &redef;
## This event can be generated externally to this script if on-demand
## tracefile rotation is required with the caveat that the script
## doesn't currently attempt to get back on schedule automatically and
## the next trim likely won't happen on the
## :bro:id:`TrimTraceFile::trim_interval`.
global go: event(first_trim: bool);
}
event TrimTraceFile::go(first_trim: bool)
{
if ( bro_is_terminating() || trace_output_file == "" )
return;
if ( ! first_trim )
{
local info = rotate_file_by_name(trace_output_file);
if ( info$old_name != "" )
system(fmt("/bin/rm %s", info$new_name));
}
schedule trim_interval { TrimTraceFile::go(F) };
}
event zeek_init()
{
if ( trim_interval > 0 secs )
schedule trim_interval { TrimTraceFile::go(T) };
}