evmfilterfile(4)evmfilterfile(4)NAMEevmfilterfile - Event Manager filter file
SYNOPSISDESCRIPTION
A filter file contains one or more filter descriptions, which can be
referenced through certain EVM commands by using indirect filter syn‐
tax. An indirect filter specifier has the following form:
In the previous indirect filter specifier, filename is the name of a
filter file, and filter_name is the name of a filter contained in the
file. If no filter_name is specified, the first filter in the file is
used.
By convention, filter file names should have the suffix If a command
cannot find the file with the name as specified, it appends and tries
again.
If a relative pathname is given for a file, commands search for the
file in each location specified by the environment variable if it is
present. Otherwise the search is performed in the following standard
locations in turn, stopping as soon as the file is found:
· The current working directory
·
·
Several supplied filter files, containing shortcut filters for many
system events, can be found in the directory System administrators
should place site-specific filter files in
The filter file is made up of a series of keyword/value and key‐
word/group pairs. Values containing spaces must be enclosed in double
quotes. Strings may be continued across a newline by finishing the
line with a backslash character. Any portion of a line from an
unquoted number sign to the end of line is a comment. Blank lines are
ignored.
The following keywords are recognized:
Introduces a filter group.
Names the filter.
The filter_value is a string that conforms to EVM fil‐
ter syntax. See the EvmFilter(5) manpage for
information about filter syntax.
Modifies the current
filter_value. See the description of the and key‐
words below.
Modifies the current
filter_value. See the description of the and key‐
words below.
The filter_title is a text string that describes the
purpose of the filter. The title is not currently
used, but always should be included.
The and keywords can appear multiple times in a filter group, allowing
you to build and maintain a filter in simple single-line increments.
Each filter_element must be a valid filter string, conforming to the
syntax described in the EvmFilter(5) manpage. A complete filter string
is assembled by surrounding the initial filter with parentheses and
appending the filter_elements to it, separating each with a logical
(for or (for operator. For example:
The previous filter lines are equivalent to this more complex single
filter line:
The first line selects all events with a priority of 200 or greater,
the next modifies this by selecting all events from regardless of their
priorities, and the last line excludes all events regardless of their
priorities.
If you prefer, you can omit the command, and build the complete filter
string from and lines.
Notes
If you are concerned with allowing your file to be used on other sys‐
tems that support EVM in the future, you should use the built-in macro
in place of the first two components of the name of any system event.
This will make it unnecessary to change the file if the other system
uses a different event name prefix.
EXTERNAL INFLUENCES
Environment Variables
A colon-separated set of directory pathnames to be searched for a
requested filter file. If this variable is present in the environment
the directories are searched in place of the standard directories.
EXAMPLES
1. The following is an example of a pair of entries in a filter file:
2. The following command finds and displays all EVM events, using a
filter stored in the supplied filter file
3. Assuming that the filter file shown in the first example is named
and is located in a standard filter directory, the following command
displays the value of the filter from that file:
FILES
Site-specific filter files.
System filter files.
SEE ALSO
Commands
evmget(1), evmshow(1), evmwatch(1).
Routines
EvmFilterCreate(3), EvmFilterDestroy(3), EvmFilterIsFile(3), EvmFilter‐
ReadFile(3), EvmFilterSet(3), EvmFilterTest(3).
Event Management
EVM(5).
EVM Events
EvmEvent(5).
Event Filter
EvmFilter(5).
evmfilterfile(4)
