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Change ASCII writer to delay creation of log after rotation until next write.

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When a given log was rotated, a new log was opened immediately.  If that
log was never written to again, those empty logs perpetually rotate, too.
This change makes it so a log won't be created for a given rotation interval
if there was nothing written to it in that interval.
This commit is contained in:
Jon Siwek 2011-08-25 10:00:40 -05:00
parent 9160898d03
commit 38e562dd30
3 changed files with 11 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

13
src/LogWriterAscii.cc
View file

@ -216,6 +216,9 @@ bool LogWriterAscii::DoWriteOne(ODesc* desc, LogVal* val, const LogField* field)
bool LogWriterAscii::DoWrite(int num_fields, const LogField* const * fields,
LogVal** vals)
{
if ( ! file )
DoInit(Path(), NumFields(), Fields());
ODesc desc(DESC_READABLE);
desc.SetEscape(separator, separator_len);
@ -245,19 +248,23 @@ bool LogWriterAscii::DoWrite(int num_fields, const LogField* const * fields,
bool LogWriterAscii::DoRotate(string rotated_path, double open,
double close, bool terminating)
{
if ( IsSpecial(Path()) )
// Don't rotate special files.
// Don't rotate special files or if there's not one currently open.
if ( ! file || IsSpecial(Path()) )
return true;
fclose(file);
file = 0;
string nname = rotated_path + ".log";
rename(fname.c_str(), nname.c_str());
if ( ! FinishedRotation(nname, fname, open, close, terminating) )
{
Error(Fmt("error rotating %s to %s", fname.c_str(), nname.c_str()));
return false;
}
return DoInit(Path(), NumFields(), Fields());
return true;
}
bool LogWriterAscii::DoSetBuf(bool enabled)

2
testing/btest/Baseline/policy.frameworks.logging.rotate-custom/out
View file

@ -59,7 +59,6 @@ custom rotate, [writer=WRITER_ASCII, fname=test2-11-03-07_12.59.55.log, path=tes
> test.2011-03-07-10-00-05.log
> test.2011-03-07-11-00-05.log
> test.2011-03-07-12-00-05.log
> test.log
> test2-11-03-07_03.00.05.log
> test2-11-03-07_03.59.55.log
> test2-11-03-07_04.00.05.log
@ -80,4 +79,3 @@ custom rotate, [writer=WRITER_ASCII, fname=test2-11-03-07_12.59.55.log, path=tes
> test2-11-03-07_11.59.55.log
> test2-11-03-07_12.00.05.log
> test2-11-03-07_12.59.55.log
> test2.log

2
testing/btest/policy/frameworks/logging/rotate.bro
View file

@ -1,5 +1,5 @@
#
# @TEST-EXEC: bro -r %DIR/rotation.trace %INPUT 2>&1 | grep "test" >out
# @TEST-EXEC: bro -b -r %DIR/rotation.trace %INPUT 2>&1 | grep "test" >out
# @TEST-EXEC: for i in test.*.log; do printf '> %s\n' $i; cat $i; done >>out
# @TEST-EXEC: btest-diff out