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EVM(5)

NAME

EVM - Event Management

DESCRIPTION

The purpose of the EVM event management system is to provide a means for any system component or application to indicate that something has happened that may be of interest to some other entity. The indication is known as an event, and the component posting the event is known as an event generator or event poster. The entity interested in the indication is known as an event subscriber. Posters and subscribers are also known as EVM clients. Event Manager (EVM) is a Tru64 UNIX software component that provides the following features: · A way for kernel-level and user-level processes and components to post events · A way for processes to subscribe for notification when selected events occur · A viewer, allowing users to review events · A supporting API library · Supporting command-line utilities Events are handled through an event channel, which is a generic name applied to the overall processing of an event within the EVM system. For an event poster, an event channel is a sink. For an event subscriber, an event channel is a source. The event poster (posting client) does not know or care who might be interested in the event; it simply uses an available event channel to post the event. It is the responsibility of the event channel to decide how to make the event available, and to whom. The event subscriber (subscribing client) is responsible for identifying an interest in events to the event channel. An event client may be a user-level process, a kernel subsystem, or (through some utility program) a user. Events are particularly useful to applications which need to: · Keep the system administrator informed of their own state, or of the state of the components they control or monitor · Make their state, or the state of the components they control or monitor, available to other monitoring components

SEE ALSO

Commands: evmchmgr(8), evmd(8), evmget(1), evminfo(1), evmlogger(8), evmpost(1), evmreload(8), evmshow(1), evmsort(1), evmstart(8), evmstop(8), evmwatch(1) Routines: EvmConnControl(3), EvmConnCreate(3), EvmConnSubscribe(3), EvmConnWait(3), EvmEventCreate(3), EvmEventDump(3), EvmEventFormat(3), EvmEventPost(3), EvmEventRead(3), EvmEventValidate(3), EvmFilterCreate(3), EvmItemSet(3), EvmSrvStart(3), EvmStatusTextGet(3), EvmVarSet(3) Files: evm.auth(4), evmchannel.conf(4), evmdaemon.conf(4), evmfilterfile(4), evmlogger.conf(4), evmtemplate(4) Event Callback: EvmCallback(5) Event Connection: EvmConnection(5) EVM Events: EvmEvent(5) Event Filter: EvmFilter(5) Common Desktop Environment: Programmer's Guide System Administration Programmer's Guide

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