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HP-UX 11i Version 3: February 2007

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evmsort — sort events


evmsort [-A [-t show_template]] [-s sport_spec] [filename | -]


The evmsort command reads and sorts a stream of EVM events. By default, events are read from stdin, and are sorted into ascending timestamp order. Sorted events are written to the command's stdout stream in the form of raw EVM events.

The sort order can be specified by supplying a sort_spec, either through the -s option or by setting the environment variable EVM_SORT_SPEC to the required specification. The specification is a character string of the form:

@key_item [ +|- ] [:@ key_item[ +|- ]]

The key_item is the name of any EVM standard data item and the @ character is optional.

If the special key_item @@ is specified, the event's format data item is expanded as described in the evmshow(1) manpage, and the resulting string is used as the sort key.

The optional trailing + or - character indicates ascending (+} or descending (-) sort. By default, items are sorted in ascending order.

Multiple items in the string are separated by colon characters (:). The left-most key_item in the specification is the most significant key.

If a key_item that is included in the sort specification is not present in an event read from the input stream, the item is considered to have a low value for that event. For example, if input events are being sorted in ascending order according to their name data items, and one event does not contain a name, that event appears first in the output stream.

If the -A option is specified, evmsort automatically starts evmshow and pipes the sorted event stream into it, producing a sorted and formatted display of events. If a -t show_template argument is also specified with -A, the specified template string is passed to evmshow through its own -t option.

See the evmshow(1) manpage for more information.



Automatically starts evmshow to produce a formatted display of the sorted events.

-s sort_spec

The specification to be used in sorting events. See the DESCRIPTION section for the syntax of the sort_spec, and for details of the default sort order.

-t show_template

Template string to be passed to evmshow if the -A option is also specified. If the -A option is not specified, this argument is ignored. See the evmshow(1) manpage for a description of the template string.



Reads event sources from filename. If filename is omitted, or is specified as -, event sources are read from stdin.


Environment Variables

The following environment variables affect the execution of evmsort:


This variable contains a string formatted as described for a sort_spec. If the -s option is omitted, the string is used as the sort_spec.


The following exit values are returned:


Successful completion.

not 0

An error occurred.


  • The following example retrieves all events with a priority of 300 or greater, sorts them into descending order of priority (most urgent event first) and then ascending order of time (oldest event first), and automatically runs evmshow to display them.

evmget -f '[priority >= 300]' | evmsort -s "@priority-:@timestamp" | evmshow -t "@priority @timestamp @@"

  • The following example yields a list of all events, sorted with the latest event first within name.

    evmget | evmsort -s "@name:@timestamp-" | evmshow -t "@name @timestamp @@"

  • The following example yields a list of all events, sorted first in order of their formatted messages and then sorted in ascending order of time. Events are passed to evmshow for display and subsequently to the more command for viewing.

    evmget | evmsort -A -s "@@:@timestamp" -t "@timestamp @@" | more


The evmsort command rejects attempts to output raw events to a terminal device.


Event Management


EVM Events


Event Filter


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