Re: script log file (how)
- From: Jeffery Hicks <"jhicks[at]SAPIEN.com">
- Date: Fri, 26 Jan 2007 08:21:25 -0500
On Thu, 25 Jan 2007 20:06:25 -0800, Steven wrote:
I have a DOS batch file I use for backing up certain files and then burning
them to DVD's using nero once a week.
The problem with my original script was that it didn't keep any logs of what
it did and/or when it fails. If anything fails I had to investigate it
manually (time consuming).
I've since modified it to redirect any "console" output to a text file and
inserted "you are here" type ECHO's throught the script. The output also
creates a new log file every year so a single log file doesn't get too big
if no one ever purges it. Now I have a record of the previous 1 to 52 runs
but the logs eventually take up space and become difficult to work with.
I want to modify the script to maintain a single log file and purge old
records as needed. I want it to be self contained and not grow out of
control.
Q1: Is there an easy way to keep an ongoing record of previous runs in a log
file AND also prevent the log file from ballooning into a huge file (I want
it be a maximum size of 1 MB, or only keep a certain number of runs if
possible)?
Here is a snippet of the script I run (working portions removed for
brevity):
[start]
echo start
echo copy files into archive
echo burn archive using nerocmd.exe
echo done
[end]
command= c:\scripts\burnit.bat >> burnit_log_%date:~10,4%.txt
Result:
-creates a "burnit_log_2007.txt" file and appends all output that would
normally be printed to the screen during each run
-burnit_log_2007.txt can grow to a large size if problems are encountered or
the file is never purged
That's going to be difficult to do with a batch file. There isn't an easy
way to treat the text file as a database which is what it seems you're
trying to do. Now you could check the size of the file and if exceeds a
specified threshold, then whack it and start a new one. Here's an old
batch file that takes a filename and size as parameters. If the file size
exceeds the parameter it displays a message.
@echo off
::CHKSIZE.BAT
if %1$==$ GOTO :Error
if %2$==$ GOTO :Error
SET TARGET=%1
SET SIZE=%2
for /f "tokens=2 delims=)" %%i in ('dir /-c %TARGET% ^|find /i
"bytes"^|find /v
/i "free"') do @set Z=%%i
for /f "tokens=1 delims=b" %%i in ('echo %z%') do @set Z=%%i
if %Z% GEQ %SIZE% ECHO %TARGET% is larger than %SIZE% bytes
REM instead of GEQ you could substitute:
REM use LEQ for less than or equal to
REM use EQU for equal to
REM use LSS for less than
REM use GTR for greater than
SET TARGET=
SET SIZE=
SET Z=
GOTO :EOF
:ERROR
Echo Missing Parameter!
echo USAGE: %0 filename size_threshold_bytes
echo Example %0 c:\files\log.txt 1024
:EOF
--
Jeffery Hicks
SAPIEN Technologies - Scripting, Simplified. www.SAPIEN.com
VBScript & Windows PowerShell Training -
www.ScriptingTraining.com/classes.asp
Windows PowerShell? - www.SAPIENPress.com/powershell.asp
blog: http://blog.SAPIEN.com
blog: http://jdhitsolutions.blogspot.com
.
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