From 12e0e58dafd2b891df90118ba55333914e4d0f5d Mon Sep 17 00:00:00 2001 From: Micael Karlberg Date: Thu, 23 Feb 2012 12:05:07 +0100 Subject: [snmp/agent] Documenting previously existing but undocumented function Documenting previously existing but undocumented function, snmp_generic:get_table_info/2. OTP-9942 --- lib/snmp/doc/src/notes.xml | 52 +++++++++++++++++++++++++ lib/snmp/doc/src/snmp_generic.xml | 81 +++++++++++++++++++++++++++++++++------ 2 files changed, 121 insertions(+), 12 deletions(-) (limited to 'lib/snmp/doc') diff --git a/lib/snmp/doc/src/notes.xml b/lib/snmp/doc/src/notes.xml index 704ff0a20f..a40e325ea2 100644 --- a/lib/snmp/doc/src/notes.xml +++ b/lib/snmp/doc/src/notes.xml @@ -33,6 +33,58 @@ +
+ SNMP Development Toolkit 4.22 +

Version 4.22 supports code replacement in runtime from/to + version 4.21.7, 4.21.6, 4.21.5, 4.21.4, 4.21.3, 4.21.2, 4.21.1 and + 4.21.

+ +
+ Improvements and new features + + + + +

[agent] Documenting previously existing but undocumented function, + snmp_generic:get_table_info/2.

+

Own Id: OTP-9942

+ + + + +
+ +
+ Reported Fixed Bugs and Malfunctions +

-

+ + + +
+ +
+ Incompatibilities +

-

+
+ +
+ +
SNMP Development Toolkit 4.21.7

Version 4.21.7 supports code replacement in runtime from/to diff --git a/lib/snmp/doc/src/snmp_generic.xml b/lib/snmp/doc/src/snmp_generic.xml index 77f3cefaa2..79a22323d9 100644 --- a/lib/snmp/doc/src/snmp_generic.xml +++ b/lib/snmp/doc/src/snmp_generic.xml @@ -1,10 +1,10 @@ - +

- 19962009 + 19962012 Ericsson AB. All Rights Reserved. @@ -34,15 +34,16 @@ snmp_generic Generic Functions for Implementing SNMP Objects in a Database -

The module snmp_generic contains generic functions for implementing tables - (and variables) using the SNMP built-in database or Mnesia. These - default functions are used if no instrumentation function is - provided for a managed object in a MIB. Sometimes, it might be - necessary to customize the behaviour of the default functions. For - example, in some situations a trap should be sent if a row is - deleted or modified, or some hardware is to be informed, when - information is changed. -

+ +

The module snmp_generic contains generic functions for + implementing tables (and variables) using the SNMP built-in database + or Mnesia. These default functions are used if no instrumentation + function is provided for a managed object in a MIB. Sometimes, + it might be necessary to customize the behaviour of the default + functions. For example, in some situations a trap should be sent + if a row is deleted or modified, or some hardware is to be informed, + when information is changed.

+

The overall structure is shown in the following figure:

          +---------------+
@@ -93,6 +94,7 @@
   
 
   

+    
     DATA TYPES
     
In the functions defined below, the following types are used:

     
@@ -118,7 +120,10 @@ value() = term()
           case of a set operation. 

       
     
+
+    
   

+
   
     
       get_status_col(Name, Cols)
@@ -136,8 +141,11 @@ value() = term()
         
This function can be used in instrumentation functions for
           is_set_ok, undo or set to check if the
           status column of a table is modified.

+	  
+	  
       
     
+
     
       get_index_types(Name)
       Get the index types of Name
@@ -147,9 +155,36 @@ value() = term()
       
         
Gets the index types of Name

         
This function can be used in instrumentation functions to
-          retrieve the index types part of the table info.

+	retrieve the index types part of the table info.

+	
+	
       
     
+
+    
+      get_table_info(Name, Item) -> table_info_result()
+      Get table info item of MIB table Name
+      
+        Name = name()
+        Item = table_item() | all
+        table_item() = nbr_of_cols | defvals | status_col | not_accessible | 
+	index_types | first_accessible | first_own_index
+        table_info_result() = Value | [{table_item(), Value}]
+        Value = term()
+      
+      
+        
Get a specific table info item or, if Item has the
+	value all, a two tuple list (property list) is instead 
+	returned with all the items and their respctive values of the 
+	given table. 

+
+        
This function can be used in instrumentation functions to
+	retrieve a given part of the table info.

+	
+	
+      
+    
+
     
       table_func(Op1, NameDb)
       table_func(Op2, RowIndex, Cols, NameDb) -> Ret
@@ -190,8 +225,11 @@ value() = term()
         
The function returns according to the specification of an
           instrumentation function.
           

+	
+	
       
     
+
     
       table_get_elements(NameDb, RowIndex, Cols) -> Values
       Get elements in a table row
@@ -204,8 +242,11 @@ value() = term()
       
         
Returns a list with values for all columns in Cols.
           If a column is undefined, its value is noinit.

+	
+	
       
     
+
     
       table_next(NameDb, RestOid) -> RowIndex | endOfTable
       Find the next row in the table
@@ -217,8 +258,11 @@ value() = term()
       
         
Finds the indices of the next row in the table.  RestOid
           does not have to specify an existing row.

+	
+	
       
     
+
     
       table_row_exists(NameDb, RowIndex) -> bool()
       Check if a row in a table exists
@@ -228,8 +272,11 @@ value() = term()
       
       
         
Checks if a row in a table exists.

+	
+	
       
     
+
     
       table_set_elements(NameDb, RowIndex, Cols) -> bool()
       Set elements in a table row
@@ -246,8 +293,11 @@ value() = term()
           mnesia:write to store the values.  This means that
           this function must be called from within a transaction
           (mnesia:transaction/1 or mnesia:dirty/1).

+	
+	
       
     
+
     
       variable_func(Op1, NameDb)
       variable_func(Op2, Val, NameDb) -> Ret
@@ -268,8 +318,11 @@ value() = term()
           the database. 

         
The function returns according to the specification of an 
           instrumentation function. 

+	
+	
       
     
+
     
       variable_get(NameDb) -> {value, Value} | undefined
       Get the value of a variable
@@ -279,8 +332,11 @@ value() = term()
       
       
         
Gets the value of a variable.

+	
+	
       
     
+
     
       variable_set(NameDb, NewVal) -> true | false
       Set a value for a variable
@@ -299,6 +355,7 @@ value() = term()
   
 
   

+    
     Example
     
The following example shows an implementation of a table which is
       stored in Mnesia, but with some checks performed at set-request
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