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Man Pages


Manual Reference Pages  -  SNMPA_MIB_STORAGE (3)

NAME

snmpa_mib_storage -
Behaviour module for the SNMP agent mib storage.

CONTENTS

Description
Exports

DESCRIPTION

This module defines the behaviour of the SNMP agent mib storage.

The mib storage is used by the agent to store internal mib- related information. The mib storage module is used by several entities, not just the mib-server.

A snmpa_mib_storage compliant module must export the following functions:

* open/5
* close/1
* read/2
* write/2
* delete/1
* delete/2
* match_object/2
* match_delete/2
* tab2list/1
* info/1
* sync/1
* backup/2

The semantics of them and their exact signatures are explained below.

CALLBACK FUNCTIONS

The following functions must be exported from a mib-server data callback module:

EXPORTS

Module:open(Name, RecordName, Fields, Type, Options) -> {ok, TabId} | {error, Reason}

Types:

Name = atom()
RecordName = atom()
Fields = [atom()]
Type = set | bag()
Options = list()
TabId = term()
Reason = term()

Create or open a mib storage table.

Note that the RecordName and Fields arguments my not be used in all implementations (they are actually only needed for mnesia-based implementations).

Note also that the Options argument comes from the options config option of the mib-storage config option, and is passed on as is.

Module:close(TabId) -> void()

Types:

State = term()

Close the mib-storage table.

Module:read(TabId, Key) -> false | {value, Record}

Types:

TabId = term()
Key = term()
Record = tuple()

Read a record from the mib-storage table.

Module:write(TabId, Record) -> ok | {error, Reason}

Types:

TabId = term()
Record = tuple()
Reason = term()

Write a record to the mib-storage table.

Module:delete(TabId) -> void()

Types:

TabId = term()

Delete an entire mib-storage table.

Module:delete(TabId, Key) -> ok | {error, Reason}

Types:

TabId = term()
Key = term()
Reason = term()

Delete a record from the mib-storage table.

Module:match_object(TabId, Pattern) -> {ok, Recs} | {error, Reason}

Types:

TabId = term()
Pattern = match_pattern()
Recs = [tuple()]
Reason = term()

Search the mib-storage table for record that match the specified pattern.

Module:match_delete(TabId, Pattern) -> {ok, Recs} | {error, Reason}

Types:

TabId = term()
Pattern = match_pattern()
Recs = [tuple()]
Reason = term()

Search the mib-storage table for record that match the specified pattern and then delete them. The records deleted are also returned.

Module:tab2list(TabId) -> Recs

Types:

TabId = term()
Recs = [tuple()]

Return all records in the mib-storage table in the form of a list.

Module:info(TabId) -> {ok, Info} | {error, Reason}

Types:

TabId = term()
Info = term()
Reason = term()

Retrieve implementation dependent mib-storage table information.

Module:sync(TabId) -> void()

Types:

TabId = term()

Synchronize the mib-storage table.

What this means, if anything, is implementation dependent.

Module:backup(TabId, BackupDir) -> ok | {error, Reason}

Types:

TabId = term()
BackupDir = string()
Reason = term()

Perform a backup of the mib-storage table.

What this means, if anything, is implementation dependent.

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Ericsson AB SNMPA_MIB_STORAGE (3) snmp 5.2.2

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