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evlconfig



SYNOPSIS

       evlconfig  -l | --list

       evlconfig  -s | --screen   filter | nofilter

       evlconfig  -i | --interval seconds

       evlconfig  -c | --count events

       evlconfig  -d | --discarddups  on | off

       evlconfig  -L | --lookbacks size

       evlconfig  -o | --output   severity-level | off


DESCRIPTION

       The evlconfig command lets you change the default settings
       for event logging.  Unless otherwise noted,  root  permis­
       sion is required to use the following evlconfig options.


OPTIONS

       -l, --list
              Lists current settings for the following:
                 Discarding of duplicate events, enabled or disabled
                 Discarding of duplicates of time interval and count
                 Number of events in the duplicate lookback buffer
                 Event screening
                 Console display level
              This option is available to all users.

       -s, --screen  filter|nofilter
              Specifies  a  filter  name or filter expression for
              screening out events. See the evlquery man page for
              details.  All events that match the filter are dis­
              carded. All event record attributes from the  fixed
              portion  of  the event record can be specified. The
              default logging behavior is that events logged from
              the  kernel  (log_facility==KERN) or logged by root
              (effective user ID of 'root') are not screened  out
              and  discarded.  Also,  by default applications are
              not screened out and discarded  (unless  attempting
              to  log  with log_facility==KERN). Issuing the evl­
              config command with the  --screen  option  replaces
              the  existing screen, if any, and a filter specifi­
              cation of nofilter removes the screen.

       -i, --interval seconds
              Sets the time  interval  for  discarding  duplicate
              events.   After it has discarded a duplicate event,
              evlogd will wait no more  than  this  many  seconds
              duplicates of an event  before  logging  a  message
              about  the discarded duplicates.  The default count
              is 100 events. The allowable range  is  from  1  to
              10000.  If  this parameter (count) is non-zero, but
              interval is set to zero,  then  the  discarding  of
              duplicates  will  be based strictly on event count,
              and time interval will be ignored. If interval  and
              count  are  both equal to zero, then logging a mes­
              sage about the discarded duplicates will be delayed
              for as long as possible.

       -L, --lookbacks size
              Sets  the number of entries in the lookback buffer,
              used as a cache for discarding of  duplicates.   An
              incoming  event  is  compared against all events in
              the lookback buffer to determine if it is a  dupli­
              cate.   If it is not identical to any of the stored
              events, then it replaces one of the events  in  the
              buffer.   The  allowable range is from 1 to 10.  If
              the value is set to zero then a default size  of  5
              is used.

       -d, --discarddups on|off
              Enables  or  disables the discarding of events that
              are being logged in rapid succession.  The  default
              setting   is   on.  This  parameter  is  stored  in
              /etc/evlog.d/evlog.conf.

       -o, --output  severity-level|off
              Controls displaying of kernel events on the  system
              console.  Either specifies the severity-level(s) of
              events to be displayed on  the  console,  or  turns
              displaying  completely off.  The default setting is
              "off".  Valid  severity-levels  are  EMERG,  ALERT,
              CRIT,  ERR, WARNING, NOTICE, INFO, DEBUG.  Specify­
              ing a severity-level of  CRIT,  for  example,  will
              cause events with severity-level of CRIT and higher
              (ALERT and EMERG) to be  displayed  on  the  system
              console.

              This  option  utilizes  the same system call as the
              klogd command with the -c option.  Events forwarded
              from printk will not be displayed, since they would
              be duplicates of messages  already  displayed  from
              printk.

              For all displayed events, the facility (hex), event
              type (hex), and format (STRING, PRINTF,  BINARY  or
              NODATA)   will   be  displayed.   For  events  with
              log_format of POSIX_LOG_STRING the formatted string
              will also be displayed.  For events with log_format
              of POSIX_LOG_BINARY up to the  first  16  bytes  of

           uid!="root" && severity=DEBUG
         Console display level = CRIT

       The  event  screen  in this example indicates to log DEBUG
       events only from root. All other  DEBUG  events  are  dis­
       carded.

       Example 2.

       An  example  of kernel events displayed on the system con­
       sole:

       FFFEA1000:TDEED3991:S:This is an example of an event with log_format of STRING.
       F00002000:T00000015:B:<11223344 AABBCCDD 55667788 99AABBCC ...> 231 more bytes
       F20202000:T11110016:B:<3243632C DAB>
       FAABBCC30:T01650165:N:<No data>

       F indicates Facility (hex), T indicates Event type (hex),
       S indicates STRING, B indicates BINARY, N indicates No Data.


FILES

       /etc/evlog.d/evlog.conf
              evlogd Configuration File

       /var/evlog/eventlog
              Standard Event Log

       /var/evlog/privatelog
              Private Log

       /var/run/evlogd.pid
              evlogd Process ID


SEE ALSO

       evlquery man page    Filter expression syntax rules

                        14 September 2001             EVLCONFIG()

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