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/* sysinfo.c */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/types.h>
#ifdef __FreeBSD__
#include <kvm.h>
#include <sys/sysctl.h>
#endif /* __FreeBSD__ */
#ifdef __linux__
#include <sys/utsname.h>
#endif /* __linux__ */
#include "trivial.h"
#include "sysinfo.h"
static struct sysdata system_info = {"\0", 0, 0, 0, 0};
static int get_uname_info(struct sysdata *sd);
static int get_cpu_info(struct sysdata *sd);
static int get_vm(struct sysdata *sd);
#ifdef __FreeBSD__
static int get_uname_info(struct sysdata *sd)
{
char *un=sd->uname;
size_t max_uname=MAX_UNAME;
if(sysctlbyname("kern.version", un, &max_uname, NULL, 0)==-1){
printe("error getting os version using sysctlbyname()\n");
return 1;
}
un[MAX_UNAME-1]='\0';
strsep(&un, " ");
set_bit(sd->valid, INFO_UNAME);
return 0;
}
#endif /* __FreeBSD__ */
#ifdef __linux__
static int get_uname_info(struct sysdata *sd)
{
struct utsname buf;
if(uname(&buf)==-1){
printe("error getting os version using uname()\n");
return 1;
}
strncpy(sd->uname, buf.release, MAX_UNAME);
set_bit(sd->valid, INFO_UNAME);
return 0;
}
#endif /* __linux__ */
#ifdef __linux__
static int get_cpu_info(struct sysdata *sd)
{
FILE *cpuinfo;
char buf[200];
char ch;
int i, cpus;
clear_bit(sd->valid, INFO_CPU);
#ifdef _SC_NPROCESSORS_ONLN
if(((cpus=sysconf(_SC_NPROCESSORS_ONLN))!=-1) && (cpus>0)){
sd->nrcpus=cpus;
set_bit(sd->valid, INFO_CPU);
return 0;
}
/* sysconf failed, let's try it ourselves */
#endif /* _SC_NPROCESSORS_ONLN */
if(!(cpuinfo=fopen("/proc/cpuinfo", "r"))){
printsys("cannot open /proc/cpuinfo\n");
}
cpus=0;
for(i=0; (ch=fgetc(cpuinfo))!=EOF;){
if((ch!='\n') || (i==198)){
buf[i++]=ch;
continue;
}
i=0;
if(!strncmp(buf, "processor", 9)){
cpus++;
}
}
sd->nrcpus=cpus;
set_bit(sd->valid, INFO_CPU);
return 0;
}
#endif /* linux */
#ifdef __FreeBSD__
static int get_cpu_info(struct sysdata *sd)
{
int buf;
size_t max_buf=sizeof(int);
clear_bit(sd->valid, INFO_CPU);
#ifdef _SC_NPROCESSORS_ONLN
if(((buf=sysconf(_SC_NPROCESSORS_ONLN))!=-1) && (buf>0)){
sd->nrcpus=buf;
set_bit(sd->valid, INFO_CPU);
return 0;
}
/* sysconf failed, let's try it ourselves */
#endif /* _SC_NPROCESSORS_ONLN */
if(sysctlbyname("hw.ncpu", &buf, &max_buf, NULL, 0)){
printsys("failed sysctlbyname(\"hw.ncpu\")\n");
}
sd->nrcpus=buf;
set_bit(sd->valid, INFO_CPU);
return 0;
}
#endif /* __FreeBSD__ */
static int get_vm(struct sysdata *sd)
{
#ifdef __linux__
int res;
FILE *meminfo;
if(!(meminfo=fopen("/proc/meminfo", "r"))){
printsys("cannot open /proc/meminfo\n");
}
for(;;){
res=fscanf(meminfo, "MemTotal: %lu kB", &sd->ram);
if(res==1){
set_bit(sd->valid, INFO_RAM);
break;
}
if(feof(meminfo)){
clear_bit(sd->valid, INFO_RAM);
break;
}
while(fgetc(meminfo)!='\n');
}
clearerr(meminfo);
rewind(meminfo);
for(;;){
res=fscanf(meminfo, "SwapTotal: %lu kB", &sd->swap);
if(res==1){
set_bit(sd->valid, INFO_SWAP);
break;
}
if(feof(meminfo)){
clear_bit(sd->valid, INFO_SWAP);
break;
}
while(fgetc(meminfo)!='\n');
}
#endif /* __linux__ */
#ifdef __FreeBSD__
int buf;
size_t max_buf=sizeof(int);
kvm_t *kd;
struct kvm_swap ks;
clear_bit(sd->valid, INFO_SWAP);
kd=kvm_open(NULL, NULL, NULL, O_RDONLY, NULL);
kvm_getswapinfo(kd, &ks, 1, 0);
/* FIXME: unportable */
sd->swap=ks.ksw_total*4; /* pages to kilobytes */
set_bit(sd->valid, INFO_SWAP);
clear_bit(sd->valid, INFO_RAM);
if(sysctlbyname("hw.physmem", &buf, &max_buf, NULL, 0)){
printsys("failed sysctlbyname(\"hw.physmem\")\n");
}
sd->ram=buf/1024; /* to kilobytes */
set_bit(sd->valid, INFO_RAM);
#endif /* __FreeBSD__ */
return 0;
}
int get_uname(char **un)
{
if(test_bit(system_info.valid, INFO_UNAME)){
*un=system_info.uname;
return 0;
}
get_uname_info(&system_info);
if(test_bit(system_info.valid, INFO_UNAME)){
*un=system_info.uname;
return 0;
}
return 1;
}
inline int get_ram(unsigned long *num)
{
if(test_bit(system_info.valid, INFO_RAM)){
*num=system_info.ram;
return 0;
}
get_vm(&system_info);
if(test_bit(system_info.valid, INFO_RAM)){
*num=system_info.ram;
return 0;
}
return 1;
}
inline int get_swap(unsigned long *num)
{
if(test_bit(system_info.valid, INFO_SWAP)){
*num=system_info.swap;
return 0;
}
get_vm(&system_info);
if(test_bit(system_info.valid, INFO_SWAP)){
*num=system_info.swap;
return 0;
}
return 1;
}
int get_cpus(int *num)
{
if(test_bit(system_info.valid, INFO_CPU)){
*num=system_info.nrcpus;
return 0;
}
get_cpu_info(&system_info);
if(test_bit(system_info.valid, INFO_CPU)){
*num=system_info.nrcpus;
return 0;
}
return 1;
}
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