Below is my mib2c generated code for my own enterprise...
while compiling it it is showing following error :
# gcc -I/usr/local/include ionline.c -lnetsnmpagent
/usr/lib/gcc/i686-linux-gnu/4.6/../../../i386-linux-gnu/crt1.o: In function
`_start':
(.text+0x18): undefined reference to `main'
collect2: ld returned 1 exit status
please help me to get out of this error..
thanks in advance
-jatin
/*
* Note: this file originally auto-generated by mib2c using
* : mib2c.int_watch.conf 13957 2005-12-20 15:33:08Z tanders $
*/
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#include "ionline.h"
/*
* The variables we want to tie the relevant OIDs to.
* The agent will handle all GET and (if applicable) SET requests
* to these variables automatically, changing the values as needed.
*/
int cpuPercentUsage = 0; /* XXX: set default value */
/*
* Our initialization routine, called automatically by the agent
* (Note that the function name must match init_FILENAME())
*/
void
init_ionline(void)
{
netsnmp_handler_registration *reg;
netsnmp_watcher_info *winfo;
static oid cpuPercentUsage_oid[] = { 1,3,6,1,4,1,21067,3,1,2,3,1 };
/*
* a debugging statement. Run the agent with -Dionline to see
* the output of this debugging statement.
*/
DEBUGMSGTL(("ionline", "Initializing the ionline module\n"));
/*
* Register scalar watchers for each of the MIB objects.
* The ASN type and RO/RW status are taken from the MIB definition,
* but can be adjusted if needed.
*
* In most circumstances, the scalar watcher will handle all
* of the necessary processing. But the NULL parameter in the
* netsnmp_create_handler_registration() call can be used to
* supply a user-provided handler if necessary.
*
* This approach can also be used to handle Counter64, string-
* and OID-based watched scalars (although variable-sized writeable
* objects will need some more specialised initialisation).
*/
DEBUGMSGTL(("ionline",
"Initializing cpuPercentUsage scalar integer. Default value =
%d\n",
cpuPercentUsage));
reg = netsnmp_create_handler_registration(
"cpuPercentUsage",NULL,
cpuPercentUsage_oid, OID_LENGTH(cpuPercentUsage_oid),
HANDLER_CAN_RONLY);
winfo = netsnmp_create_watcher_info(
&cpuPercentUsage, sizeof(long),
ASN_INTEGER, WATCHER_FIXED_SIZE);
////winfo->max_size = sizeof(cpuPercentUsage);
if (netsnmp_register_watched_scalar( reg, winfo ) < 0 ) {
snmp_log( LOG_ERR, "Failed to register watched cpuPercentUsage" );
}
int handle_diskp(netsnmp_mib_handler *handler,netsnmp_handler_registration
*reginfo,
netsnmp_agent_request_info *reqinfo,netsnmp_request_info
*requests)
{
/* We are never called for a GETNEXT if it's registered as a
"instance", as it's "magically" handled for us. */
/* a instance handler also only hands us one request at a time, so
we don't need to loop over a list of requests; we'll only get one. */
switch(reqinfo->mode)
{
int data=20;
case MODE_GET:
snmp_set_var_typed_value(requests->requestvb,
ASN_INTEGER,
// XXX: a pointer to the scalar's data
(u_char *) data,
// XXX: the length of the data in bytes
sizeof(data)
);
break;
default:
// we should never get here, so this is a really bad error
snmp_log(LOG_ERR, "unknown mode (%d) in handle_diskp\n",
reqinfo->mode );
printf("error to getting value\n");
return SNMP_ERR_GENERR;
}
return SNMP_ERR_NOERROR;
}
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