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logstalgia(1)                                                    logstalgia(1)


       Logstalgia -  a web server access log visualization tool


       logstalgia [options] logfile


       logstalgia  is  a visualization tool that replays or streams web server
       access logs as a retro arcade game simulation.


       logstalgia's display is rendered using OpenGL and requires a 3D  accel-
       erated video card to run.

       Logstalgia supports several standardized access.log formats used by web
       servers such as Apache and Nginx (see 'SUPPORTED LOG FORMATS' below).

       As logstalgia is designed to playback logs in real time you will need a
       log  from  a  fairly  busy webserver to achieve interesting results (eg
       100s of requests each minute).


       -f     Fullscreen.

              Set the window size. If -f is also supplied, will attempt to set
              the video mode to this also. Add ! to make the window non-resiz-

       --screen SCREEN
              Set the number of the screen to display on.

       --window-position XxY
              Initial window position on your desktop which may be made up  of
              multiple monitors.

              This will override the screen setting so don't specify both.

              Frameless window.

       --title TITLE
              Set a title.

       -b, --background
              Background colour in hex.

       -x  --full-hostnames
              Show full request ip/hostname.

       -s, --simulation-speed
              Simulation speed. Defaults to 1 (1 second-per-second).

       -p, --pitch-speed
              Speed balls travel across the screen (defaults to 0.15).

       -u, --update-rate
              Page Summary update speed. Defaults to 5 (5 seconds).

       -g         name,(HOST|URI|CODE)=regex[,SEP=chars][,MAX=n][,ABBR=n],per-
              Creates  a  new  named summarizer group for requests for which a
              specified attribute (HOST, URI or response CODE) matches a regu-
              lar  expression.  Percent  specifies  a  vertical  percentage of
              screen to use.

              SEP=chars can specify a list of separator characters (e.g. /) to
              split on. The default separator is /.

              MAX=n  specifies  the  max  depth into the path to be displayed.
              (e.g. MAX=1 would show only root directory names of  paths).  By
              default there is 0 (no limit).

              ABBR=n  specifies  the minimum depth at which to allow partially
              abbreviated strings. The default is 0 (allow). -1 to disallow.

              A colour may optionally be supplied in  hexadecimal  format  (eg
              FF0000  for red) which will be applied to all labels and request
              balls matched to the group.


               -g "HTML,URI=html?$,30"
               -g "Lan,HOST=^192,30"
               -g "Success,CODE=^[23],30"

              If no groups are specified, the default groups are Images (image
              files), CSS (.css files) and Scripts (.js files).

              If there is enough space remaining a catch-all group 'Misc' will
              appear as the last group.

       --address-separators CHARS
              List of address separator characters. Defaults to '.:'.

       --address-max-depth DEPTH
              Maximum depth to display in address summarizer. 0 for  no  maxi-

       --address-abbr-depth DEPTH
              Minimum  abbreviation  depth  of address summarizer. 0 to always
              allow abbreviations, -1 to never abbreviate.

       --path-separators CHARS
              Default list of path separator characters. Defaults to /.

       --path-max-depth DEPTH
              Default maximum path depth shown in the  summarizer.  0  for  no

       --path-abbr-depth DEPTH
              Default  minimum  path  abbreviation  depth.  0  to always allow
              abbreviations, -1 to never abbreviate.

       --paddle-mode MODE
              Paddle mode (pid, vhost, single).

              vhost  - separate paddle for each virtual host in the log  file.

              pid    - separate paddle for each process id in the log file.

              single - single paddle (the default).

       --paddle-position POSITION
              Paddle position as a fraction of the view width (0.25 - 0.75).

       --display-fields REQUEST_FIELDS
              List  of one or more request fields that are shown when the user
              hovers the mouse over an individual request:

                  path          - the path of the resource requested
                  hostname      - hostname or IP address
                  response_size - size of the response in bytes
                  response_code - response code
                  method        - method
                  protocol      - protocol
                  timestamp     - timestamp of request
                  referrer      - referrer URL of the request
                  user_agent    - user agent
                  vhost         - virtual host name
                  log_entry     - full log entry
                  pid           - the pid of the  instance  that  handled  the

              Separate multiple fields with commas (eg "path,hostname")

       --sync Read from STDIN, ignoring entries before the current time.

       --from, --to "YYYY-MM-DD hh:mm:ss +tz"
              Show entries from a specific time period.

              If  a  time  zone  offset isn't specified the local time zone is

              Example accepted formats:

                  "2012-06-30 12:00"
                  "2012-06-30 12:00:00 +12"

       --start-position POSITION
              Begin at some position in the log file (between 0.0 and 1.0).

       --stop-position POSITION
              Stop at some position.

              No bouncing.

              Hide response code.

              Hide paddle.

              Hide paddle tokens shown in multi-paddle modes.

              Hide URL protocol and hostname prefix of requests.

              Disable automatic skipping of empty time periods.

              Disable the progress bar.

              Disable the glow effect.

       --font-size SIZE
              Font size.

              Duration of the glow (between 0.0 and 1.0).

              Adjust the amount of glow.

              Intensity of the glow.

       -o, --output-ppm-stream FILE
              Write frames as PPM to a file ('-' for STDOUT).

       -r, --output-framerate FPS
              Framerate of output (used with --output-ppm-stream).

       --load-config CONFIG_FILE
              Load a config file.

       --save-config CONFIG_FILE
              Save a config file with the current options.

              Automatically reload config file when it is modified.

              The path to the access log file to read or '-' if  you  wish  to
              supply log entries via STDIN.


       Watch an example access.log using the default settings:

          logstalgia /opt/local/share/logstalgia/example.log

       Watch  the  live  access.log,  starting  from  the most recent batch of
       entries in the log (requires  tail).  Note  than  '-'  at  the  end  is
       required for logstalgia to know it needs to read from STDIN:

          tail -f /var/log/apache2/access.log | logstalgia -

       To  follow the log in real time, use the --sync option. This will start
       reading from the next entry received on STDIN:

          tail -f /var/log/apache2/access.log | logstalgia --sync

       Watch a remote access.log via ssh:

          ssh tail -f /var/log/apache2/access.log |  logstal-
       gia --sync


       Logstalgia  supports the following standardized log formats used by web
       servers like Apache and Nginx:

          NCSA Common Log Format (CLF)
              "%h %l %u %t \"%r\" %>s %b"

          NCSA Common Log Format with Virtual Host
              "%v %h %l %u %t \"%r\" %>s %b"

          NCSA extended/combined log format
              "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-agent}i\""

          NCSA extended/combined log format with Virtual Host
              "%v  %h  %l  %u  %t  \"%r\"  %>s  %b  \"%{Referer}i\"  \"%{User-

       The  process  id  (%P), or some other identifier, may be included as an
       additional field at the end of the entry. This can be used with '--pad-
       dle-mode  pid'  where a separate paddle will be created for each unique
       value in this field.


       Logstalgia now supports a pipe ('|') delimited custom log file format:

          timestamp       - unix timestamp of the request date.
          hostname        - hostname of the request
          path            - path requested
          response_code   - the response code from the webserver (eg 200)
          response_size   - the size of the response in bytes

       The following are optional:

          success         - 1 or 0 to indicate if successful
          response_colour - response colour in hexidecial (#FFFFFF) format
          referrer url    - the referrer url
          user agent      - the user agent
          virtual host    - the virtual host (to use with --paddle-mode vhost)
          pid             - process id or some other identifier (--paddle-mode

       If success or response_colour are not provided, they  will  be  derived
       from  the response_code using the normal HTTP conventions (code < 400 =


       See the guide on the homepage for examples  of  recording  videos  with


       The  time shown in the top left of the screen is set initially from the
       first log entry read and is incremented  according  to  the  simulation
       speed (-s).

       The  counter  in  the  bottom  right  hand  corner  shows the number of
       requests displayed since the start of the current session.

       Pressing space at any time will  pause/unpause  the  simulation.  While
       paused  you  may  use  the  mouse  to  inspect the detail of individual

       You can click on summarizer group entries on the left and right side of
       the screen to filter to requests matching that entry. Click on the fil-
       ter description to remove the filter.

       Interactive keyboard commands:

          (q) Debug Information
          (c) Displays Logstalgia logo
          (n) Jump forward in time to next log entry.
          (+-) Adjust simulation speed.
          (<>) Adjust pitch speed.
          (F5) Reload config
          (F11) Window frame toggle
          (F12) Screenshot
          (Alt+Enter) Fullscreen toggle
          (Ctrl+S) Save config
          (Home/End)          Adjust address summarizer maximum depth
          (Page Up/Down)      Adjust group summarizer maximum depth
          (Ctrl+Home/End)     Adjust address summarizer abbreviation depth
          (Ctrl+Page Up/Down) Adjust group summarizer abbreviation depth
          (ESC) Quit


        Written by Andrew Caudwell

        Project Homepage:


        Copyright (C) 2008 Andrew Caudwell (

        This program is free software; you can redistribute it and/or
        modify it under the terms of the GNU General Public License
        as published by the Free Software Foundation; either version
        3 of the License, or (at your option) any later version.

        This program is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        GNU General Public License for more details.

        You should have received a copy of the GNU General Public License
        along with this program.  If not, see <>.


        Catalyst IT (

        For supporting the development and promotion of Logstalgia!


logstalgia 1.1.2 - Generated Thu Jun 14 06:00:42 CDT 2018
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