Difference between revisions of "Watcher"
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(Created page with "{{helper|Watcher|code=agent/helpers/watcher.c|documentation=watcher}} The '''watcher''' does what it's named: it watches variables and any time an incoming request is made for t...") |
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Latest revision as of 22:50, 20 July 2011
| Net-SNMP MIB Helper | |
| Watcher | |
| Documentation: | doxygen API |
|---|---|
| Code: | agent/helpers/watcher.c |
| Other Helpers: | Agent Helpers |
The watcher does what it's named: it watches variables and any time an incoming request is made for the OID assigned to it, it returns the current value of the variable. It is the absolute simplest way to tie a memory address to an OID with a single line of code.
Example Usage
static int my_int = 42;
netsnmp_register_read_only_int_scalar("myVariable",
my_oid,
OID_LENGTH(my_oid),
&my_int, NULL);
Types Supported
There are a number of scalar convenience functions that can be watched.
netsnmp_register_ulong_scalar( /* ... */ ); netsnmp_register_read_only_ulong_scalar( /* ... */ ); netsnmp_register_long_scalar( /* ... */ ); netsnmp_register_read_only_long_scalar( /* ... */ ); netsnmp_register_int_scalar( /* ... */ ); netsnmp_register_read_only_int_scalar( /* ... */ ); netsnmp_register_read_only_counter32_scalar( /* ... */ );
The _read_only_ variants should be use if you don't want to support SET operations to the value.
