How to write code for a Logging Event? Post: 302579487

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Top Forums UNIX for Dummies Questions & Answers How to write code for a Logging Event? Post 302579487 by theKbStockpiler on Monday 5th of December 2011 08:18:27 PM

12-05-2011

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Lets say I'm trying to write to a file and the operation of doing this fails. Wouldn't I have to write additional code to make sure every outcome of my code was successful ,make sure data was written to the said file? If an error is not checked the application will just go on running code. An error is only an error if it is defined as one, otherwise the CPU continues running the code with erroneous data.

An analogy would be checking a simple mathematical addition equation by subtracting one of the addends from the sum to see if the other addend was left. If this check is not made we are not aware of the error and computations using this faulty data continue.

This webpage gives my original post some structure http://wiki.webratio.com/index.php/Debugging_with_application's_logs

I got to this topic indirectly from ELF files so that won't help much. Let's say I'm writing an application and think it will be useful to have some log files to view so when it crashes I will have a clue of what to look at to solve the problems the application is experiencing.

Last edited by theKbStockpiler; 12-05-2011 at 09:58 PM..

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image::exiftool::quicktime

Image::ExifTool::QuickTime(3pm) 			User Contributed Perl Documentation			   Image::ExifTool::QuickTime(3pm)

NAME

       Image::ExifTool::QuickTime - Read QuickTime and MP4 meta information

SYNOPSIS

       This module is used by Image::ExifTool

DESCRIPTION

       This module contains routines required by Image::ExifTool to extract information from QuickTime and MP4 video, and M4A audio files.

AUTHOR

       Copyright 2003-2011, Phil Harvey (phil at owl.phy.queensu.ca)

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

REFERENCES

       <http://developer.apple.com/mac/library/documentation/QuickTime/QTFF/QTFFChap1/qtff1.html>
       http://search.cpan.org/dist/MP4-Info-1.04/ <http://search.cpan.org/dist/MP4-Info-1.04/>
       http://www.geocities.com/xhelmboyx/quicktime/formats/mp4-layout.txt <http://www.geocities.com/xhelmboyx/quicktime/formats/mp4-layout.txt>
       <http://wiki.multimedia.cx/index.php?title=Apple_QuickTime>
       http://atomicparsley.sourceforge.net/mpeg-4files.html <http://atomicparsley.sourceforge.net/mpeg-4files.html>
       <http://wiki.multimedia.cx/index.php?title=QuickTime_container>
       <http://code.google.com/p/mp4v2/wiki/iTunesMetadata>
       <http://www.canieti.com.mx/assets/files/1011/IEC_100_1384_DC.pdf>
       <http://www.adobe.com/devnet/flv/pdf/video_file_format_spec_v10.pdf>

SEE ALSO

       "QuickTime Tags" in Image::ExifTool::TagNames, Image::ExifTool(3pm)

perl v5.12.4							    2011-04-14					   Image::ExifTool::QuickTime(3pm)