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Full Discussion: I need your help.
Operating Systems Solaris I need your help. Post 302233364 by jlliagre on Sunday 7th of September 2008 09:15:31 AM
Old 09-07-2008
Quote:
Originally Posted by matrixmadhan
Yes, thats right. But in the most of the cases the systems are loosely coupled by design such that each of the unit performs their job so seldom you could control the functionality or add functionality to process that is creating the log messages.
I agree it is uncommon but the OP stated he didn't want to read the output file for some reason.

If there are valid reasons not to read the file and then not to use the usual and sensible ways suggested elsewhere ("tail -f" or custom equivalent), then Solaris allows to still fulfill the requirement in at least one of these ways. The last two suggestions aren't intrusive to the process creating the log messages.

- patching the code that writes the data (only if source code is available).
- interpose a library that intercept the pattern write
- use a dtrace script to do the same

Of course, my suggestions probably do not make that much sense in this particular case as there are probably no valid reason not to read data appended to the output file. I would however support them should a very fast response time (<1s) is expected.

Eventing is faster and less demanding than polling.
 
PRIVOXY-LOG-PARSER(1)					User Contributed Perl Documentation				     PRIVOXY-LOG-PARSER(1)

NAME
privoxy-log-parser - A parser and syntax-highlighter for Privoxy log messages SYNOPSIS
privoxy-log-parser [--accept-unknown-messages] [--html-output] [--no-msecs] [--no-syntax-higlighting] [--statistics] [--shorten-thread-ids] [--show-ineffective-filters] [--url-statistics-threshold] [--version] DESCRIPTION
privoxy-log-parser reads Privoxy log messages and - syntax-highlights recognized lines, - reformats some of them for easier comprehension, - filters out less useful messages, and - (in some cases) calculates additional information, like the compression ratio or how a filter affected the content size. With privoxy-log-parser you should be able to increase Privoxy's log level without getting confused by the resulting amount of output. For example for "debug 64" privoxy-log-parser will (by default) only show messages that affect the content. If a filter doesn't cause any hits, privoxy-log-parser will hide the "filter foo caused 0 hits" message. OPTIONS
[--accept-unknown-messages] Don't print warnings in case of unknown messages, just don't highlight them. [--host-statistics-threshold] Only show the request count for a host if it's above or equal to the given threshold. If the threshold is 0, host statistics are disabled. [--html-output] Use HTML and CSS for the syntax highlighting. If this option is omitted, ANSI escape sequences are used unless --no-syntax-highlighting is active. This option is only intended to make embedding log excerpts in web pages easier. It does not escape any input! [--no-msecs] Don't expect milisecond resolution [--no-syntax-highlighting] Disable syntax-highlighting. Useful when the filtered output is piped into less in which case the ANSI control codes don't work, or if the terminal itself doesn't support the control codes. [--shorten-thread-ids] Shorten the thread ids to a three-digit decimal number. Note that the mapping from thread ids to shortened ids is created at run-time and thus varies with the input. [--show-ineffective-filters] Don't suppress log lines for filters that didn't modify the content. [--statistics] Gather various statistics instead of syntax highlighting log messages. This is an experimental feature, if the results look wrong they very well might be. Also note that the results are pretty much guaranteed to be incorrect if Privoxy and Privoxy-Log-Parser aren't in sync. [--unbreak-lines-only] Tries to fix lines that got messed up by a broken or interestingly configured mail client and thus are no longer recognized properly. Only fixes some breakage, but may be good enough or at least better than nothing. Doesn't do anything else, so you probably want to pipe the output into privoxy-log-parser again. [--url-statistics-threshold] Only show the request count for a resource if it's above or equal to the given threshold. If the threshold is 0, URL statistics are disabled. [--version] Print version and exit. EXAMPLES
To monitor a log file: tail -F /usr/jails/privoxy-jail/var/log/privoxy/privoxy.log | privoxy-log-parser Replace '-F' with '-f' if your tail implementation lacks '-F' support or if the log won't get rotated anyway. The log file location depends on your system (Doh!). To monitor Privoxy without having it write to a log file: privoxy --no-daemon /usr/jails/privoxy-jail/usr/local/etc/privoxy/config 2>&1 | privoxy-log-parser Again, the config file location depends on your system. Output redirection depends on your shell, the above works with bourne shells. To read a processed Privoxy log file from top to bottom, letting the content scroll by slightly faster than you can read: privoxy-log-parser < /usr/jails/privoxy-jail/var/log/privoxy/privoxy.log This is probably only useful to fill screens in the background of haxor movies. CAVEATS
Syntax highlighting with ANSI escape sequences will look strange if your background color isn't black. Some messages aren't recognized yet and will not be fully highlighted. privoxy-log-parser is developed with Privoxy 3.0.7 or later in mind, using earlier Privoxy versions will probably result in an increased amount of unrecognized log lines. Privoxy's log files tend to be rather large. If you use HTML highlighting some browsers can't handle them, get confused and will eventually crash because of segmentation faults or unexpected exceptions. This is a problem in the browser and not privoxy-log-parser's fault. BUGS
Many settings can't be controlled through command line options yet. SEE ALSO
privoxy(1) AUTHOR
Fabian Keil <fk@fabiankeil.de> perl v5.14.2 2012-05-18 PRIVOXY-LOG-PARSER(1)
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