From 7cf4d9bf19382527cfff1f5b62ac87b233a74b19 Mon Sep 17 00:00:00 2001 From: "Andrew M. Kuchling" Date: Fri, 26 Sep 2003 13:45:18 +0000 Subject: [Bug #812936] Correct the documentation for RotatingFileHandler. [2.3 bugfix candidate] --- Doc/lib/liblogging.tex | 26 +++++++++++++++----------- 1 file changed, 15 insertions(+), 11 deletions(-) diff --git a/Doc/lib/liblogging.tex b/Doc/lib/liblogging.tex index 28b38b0..2e4c31e 100644 --- a/Doc/lib/liblogging.tex +++ b/Doc/lib/liblogging.tex @@ -499,19 +499,23 @@ The \class{RotatingFileHandler} class supports rotation of disk log files. Returns a new instance of the \class{RotatingFileHandler} class. The specified file is opened and used as the stream for logging. If \var{mode} is not specified, \code{'a'} is used. By default, the -file grows indefinitely. You can use the \var{maxBytes} and +file grows indefinitely. + +You can use the \var{maxBytes} and \var{backupCount} values to allow the file to \dfn{rollover} at a predetermined size. When the size is about to be exceeded, the file is -closed and a new file opened for output, transparently to the -caller. Rollover occurs whenever the current log file is nearly -\var{maxBytes} in length. If \var{backupCount} is >= 1, the system -will successively create new files with the same pathname as the base -file, but with extensions ".1", ".2" etc. appended to it. For example, -with a backupCount of 5 and a base file name of "app.log", you would -get "app.log", "app.log.1", "app.log.2", ... through to -"app.log.5". When the last file reaches its size limit, the logging -reverts to "app.log" which is truncated to zero length. If -\var{maxBytes} is zero, rollover never occurs. +closed and a new file is silently opened for output. Rollover occurs +whenever the current log file is nearly \var{maxBytes} in length; if +\var{maxBytes} is zero, rollover never occurs. If \var{backupCount} +is non-zero, the system will save old log files by appending the +extensions ".1", ".2" etc., to the filename. For example, with +a \var{backupCount} of 5 and a base file name of +\file{app.log}, you would get \file{app.log}, +\file{app.log.1}, \file{app.log.2}, up to \file{app.log.5}. The file being +written to is always \file{app.log}. When this file is filled, it is +closed and renamed to \file{app.log.1}, and if files \file{app.log.1}, +\file{app.log.2}, etc. exist, then they are renamed to \file{app.log.2}, +\file{app.log.3} etc. respectively. \end{classdesc} \begin{methoddesc}{doRollover}{} -- cgit v0.12