NAME

       ZoneMinder::Logger - ZoneMinder Logger module

SYNOPSIS

         use ZoneMinder::Logger;
         use ZoneMinder::Logger qw(:all);

         logInit( "myproc", DEBUG );

         Debug( "This is what is happening" );
         Info( "Something interesting is happening" );
         Warning( "Something might be going wrong." );
         Error( "Something has gone wrong!!" );
         Fatal( "Something has gone badly wrong, gotta stop!!" );
         Panic( "Something fundamental has gone wrong, die with stack trace );

DESCRIPTION

       The ZoneMinder:Logger module contains the common debug and error reporting routines used
       by the ZoneMinder scripts.

       To use debug in your scripts you need to include this module, and call logInit. Thereafter
       you can sprinkle Debug or Error calls etc throughout the code safe in the knowledge that
       they will be reported to your error log, and possibly the syslogger, in a meaningful and
       consistent format.

       Debug is discussed in terms of levels where 1 and above (currently only 1 for scripts) is
       considered debug, 0 is considered as informational, -1 is a warning, -2 is an error and -3
       is a fatal error or panic. Where levels are mentioned below as thresholds the value given
       and anything with a lower level (ie. more serious) will be included.

METHODS

       logInit ( $id, %options );
           Initialises the debug and prepares the logging for forthcoming operations.  If not
           called explicitly it will be called by the first debug call in your script, but with
           default (and probably meaningless) options. The only compulsory arguments are $id
           which must be a string that will identify debug coming from this script in mixed logs.
           Other options may be provided as below,

            Option        Default        Description
            ---------     ---------      -----------
            level         INFO       The initial debug level which defines which statements are output and which are ignored
            trace         0          Whether to use the Carp::shortmess format in debug statements to identify where the debug was emitted from
            termLevel     NOLOG      At what level debug is written to terminal standard error, 0 is no, 1 is yes, 2 is write only if terminal
            databaseLevel INFO       At what level debug is written to the Log table in the database;
            fileLevel     NOLOG      At what level debug is written to a log file of the format of <id>.log in the standard log directory.
            syslogLevel   INFO       At what level debug is written to syslog.

           To disable any of these action entirely set to NOLOG

       logTerm ();
           Used to end the debug session and close any logs etc. Not usually necessary.

       $id            = logId ( [$id] );
       $level         = logLevel ( [$level] );
       $trace         = logTrace ( [$trace] );
       $level         = logLevel ( [$level] );
       $termLevel     = logTermLevel ( [$termLevel] );
       $databaseLevel = logDatabaseLevel ( [$databaseLevel] );
       $fileLevel     = logFileLevel ( [$fileLevel] );
       $syslogLevel   = logSyslogLevel ( [$syslogLevel] );
           These methods can be used to get and set the current settings as defined in logInit.

       Debug( $string );
           This method will output a debug message if the current debug level permits it,
           otherwise does nothing. This message will be tagged with the DBG string in the logs.

       Info( $string );
           This method will output an informational message if the current debug level permits
           it, otherwise does nothing. This message will be tagged with the INF string in the
           logs.

       Warning( $string );
           This method will output a warning message if the current debug level permits it,
           otherwise does nothing. This message will be tagged with the WAR string in the logs.

       Error( $string );
           This method will output an error message if the current debug level permits it,
           otherwise does nothing. This message will be tagged with the ERR string in the logs.

       Fatal( $string );
           This method will output a fatal error message and then die if the current debug level
           permits it, otherwise does nothing. This message will be tagged with the FAT string in
           the logs.

       Panic( $string );
           This method will output a panic error message and then die with a stack trace if the
           current debug level permits it, otherwise does nothing. This message will be tagged
           with the PNC string in the logs.

   EXPORT
       None by default.  The :constants tag will export the debug constants which define the
       various levels of debug The :variables tag will export variables containing the current
       debug id and level The :functions tag will export the debug functions. This or :all is
       what you would normally use.  The :all tag will export all above symbols.

SEE ALSO

       Carp Sys::Syslog

       The ZoneMinder README file Troubleshooting section for an extended discussion on the use
       and configuration of syslog with ZoneMinder.

       http://www.zoneminder.com

AUTHOR

       Philip Coombes, <philip.coombes@zoneminder.com>

COPYRIGHT AND LICENSE

       Copyright (C) 2001-2008  Philip Coombes

       This library is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself, either Perl version 5.8.3 or, at your option, any later version of
       Perl 5 you may have available.