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/*
* 13 Jun 91 wsak (wk0x@andrew) added mips support
*/
#include <net-snmp/net-snmp-config.h>
#ifdef NETSNMP_CAN_USE_NLIST
#include <sys/types.h>
#if HAVE_STDLIB_H
#include <stdlib.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdio.h>
#include <errno.h>
#if HAVE_STRING_H
#include <string.h>
#endif
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#if HAVE_KVM_H
#include <kvm.h>
#endif
#include <net-snmp/net-snmp-includes.h>
#include "kernel.h"
#include <net-snmp/agent/ds_agent.h>
#ifndef NULL
#define NULL 0
#endif
#if HAVE_KVM_H
kvm_t *kd;
void
init_kmem(const char *file)
{
#if HAVE_KVM_OPENFILES
char err[4096];
kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, err);
if (kd == NULL && !netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS)) {
snmp_log(LOG_CRIT, "init_kmem: kvm_openfiles failed: %s\n", err);
exit(1);
}
#else
kd = kvm_open(NULL, NULL, NULL, O_RDONLY, NULL);
if (!kd && !netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS)) {
snmp_log(LOG_CRIT, "init_kmem: kvm_open failed: %s\n",
strerror(errno));
exit(1);
}
#endif /* HAVE_KVM_OPENFILES */
}
/*
* klookup:
*
* It seeks to the location off in kmem
* It does a read into target of siz bytes.
*
* Return 0 on failure and 1 on sucess.
*
*/
int
klookup(unsigned long off, char *target, int siz)
{
int result;
if (kd == NULL)
return 0;
result = kvm_read(kd, off, target, siz);
if (result != siz) {
#if HAVE_KVM_OPENFILES
snmp_log(LOG_ERR, "kvm_read(*, %lx, %p, %d) = %d: %s\n", off,
target, siz, result, kvm_geterr(kd));
#else
snmp_log(LOG_ERR, "kvm_read(*, %lx, %p, %d) = %d: ", off, target,
siz, result);
snmp_log_perror("klookup");
#endif
return 0;
}
return 1;
}
#else /* HAVE_KVM_H */
static off_t klseek(off_t);
static int klread(char *, int);
int swap, mem, kmem;
void
init_kmem(const char *file)
{
kmem = open(file, O_RDONLY);
if (kmem < 0 && !netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS)) {
snmp_log_perror(file);
exit(1);
}
fcntl(kmem, F_SETFD, 1);
mem = open("/dev/mem", O_RDONLY);
if (mem < 0 && !netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS)) {
snmp_log_perror("/dev/mem");
exit(1);
}
fcntl(mem, F_SETFD, 1);
#ifdef DMEM_LOC
swap = open(DMEM_LOC, O_RDONLY);
if (swap < 0 && !netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS)) {
snmp_log_perror(DMEM_LOC);
exit(1);
}
fcntl(swap, F_SETFD, 1);
#endif
}
/*
* Seek into the kernel for a value.
*/
static off_t
klseek(off_t base)
{
return (lseek(kmem, (off_t) base, SEEK_SET));
}
/*
* Read from the kernel
*/
static int
klread(char *buf, int buflen)
{
return (read(kmem, buf, buflen));
}
/*
* klookup:
*
* It seeks to the location off in kmem
* It does a read into target of siz bytes.
*
* Return 0 on failure and 1 on sucess.
*
*/
int
klookup(unsigned long off, char *target, int siz)
{
long retsiz;
if (kmem < 0)
return 0;
if ((retsiz = klseek((off_t) off)) != off) {
snmp_log(LOG_ERR, "klookup(%lx, %p, %d): ", off, target, siz);
snmp_log_perror("klseek");
#ifdef NETSNMP_EXIT_ON_BAD_KLREAD
exit(1);
#endif
return (0);
}
if ((retsiz = klread(target, siz)) != siz) {
if (snmp_get_do_debugging()) {
/*
* these happen too often on too many architectures to print them
* unless we're in debugging mode. People get very full log files.
*/
snmp_log(LOG_ERR, "klookup(%lx, %p, %d): ", off, target, siz);
snmp_log_perror("klread");
}
#ifdef NETSNMP_EXIT_ON_BAD_KLREAD
exit(1);
#endif
return (0);
}
DEBUGMSGTL(("verbose:kernel:klookup", "klookup(%lx, %p, %d) succeeded", off, target, siz));
return (1);
}
#endif /* HAVE_KVM_H */
#endif /* NETSNMP_CAN_USE_NLIST */
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