Movatterモバイル変換


[0]ホーム

URL:


Home page logo
bugtraq logo

Bugtraqmailing list archives

PreviousBy DateNext
PreviousBy ThreadNext

swatch bug in throttle


From: SUZUKI Yasuhiro <ysuzuki () bb mbn or jp>
Date: Wed, 15 May 2002 21:48:40 +0900

Hello.I think swatch has a bug in throttle code.Using throttle, swatch will not report eventsin some cases.  * When prural events match same watchfor regular    expression in time of throttle and are not reported,    if another event matching the same regular expression    does not occur, swatch will not report the events    forever.  * If an event was not reported because it occured    in time of throttle and a next of the same event    type occurs in next month, the events will not be    reported forever. I think you can find a reason of the first bugeasily if you read a script code swatch creates.I will show you the reason of the second bug.The line 1037 of swatch source code comparesmonths of a new event and a previous one andif that of a new one is bigger, a year ofthe new event is decremented:  if ($ymdhms[1] > $Msg_Rec{$key}->{ymdhms}[1]) { $ymdhms[0]--; }Then line 1038 gets difference between two datesof the events:  my @delta_dhms = Delta_DHMS(@{$Msg_Rec{$key}->{ymdhms}}, @ymdhms);and lines from 1039 to 1042 judges if the new eventhas to be reported:  foreach my $i (0..$#min_dhms_delta) {     $passed = 0 if ($delta_dhms[$i] < $min_dhms_delta[$i]);     last unless ($delta_dhms[$i] == $min_dhms_delta[$i]);  }If $passed gets one, the events are reported.This means if the two events occur in differnet monthsa new event is recognized as it is older than the old eventand the difference of the two dates of the eventsis always negative. That makes $passed zero because$delta_dhms[$i] is always less than $min_dhms_delta[$i]and swatch will not tell the occurences of the eventsforever.I informed this bug to the author Todd Atkinsand he told me that he was improving swatch now.But I made a patch to resolve this problem forswatch 3.0.4, current version. You can get it at:http://plaza8.mbn.or.jp/~yswww/myself/swatch-en.htmlThis patch has a limitation.    Using use=message with throttle and prural  messages matching a wathfor regular expression,  some messages not reported for throttle will  not be reported for a while. swatch web site is:http://www.oit.ucsb.edu/~eta/swatch/------------------------------------------------------------SUZUKI Yasuhiro  yasu () ysuzuki net  ysuzuki () bb mbn or jphttp://plaza8.mbn.or.jp/~yswww/myself/index-e.html

PreviousBy DateNext
PreviousBy ThreadNext

Current thread:


[8]ページ先頭

©2009-2026 Movatter.jp