IP
// Auther: IYATT-yx
#include <iostream>
#include <cstring>
extern "C"
{
#include <arpa/inet.h>
#include <ifaddrs.h>
#include <netinet/in.h>
}
int main()
{
struct ifaddrs *ifAddrStruct = NULL;
void *tmpAddrPtr = NULL;
getifaddrs(&ifAddrStruct);
while (ifAddrStruct != NULL)
{
if (ifAddrStruct->ifa_addr->sa_family == AF_INET)
{
tmpAddrPtr = &((struct sockaddr_in *)ifAddrStruct->ifa_addr)->sin_addr;
char addressBuffer[INET_ADDRSTRLEN];
inet_ntop(AF_INET, tmpAddrPtr, addressBuffer, INET_ADDRSTRLEN);
if (strcmp(ifAddrStruct->ifa_name, "eth0") == 0)
{
std::cout << "eth0: " << addressBuffer << std::endl;
break;
}
else if (strcmp(ifAddrStruct->ifa_name, "wlan0") == 0)
{
std::cout << "wlan0: " << addressBuffer << std::endl;
break;
}
}
ifAddrStruct = ifAddrStruct->ifa_next;
}
}
磁盘信息
// Auther: IYATT-yx
#include <iostream>
extern "C"
{
#include <sys/vfs.h>
#include <unistd.h>
}
struct statfs diskInfo;
int main()
{
statfs("/", &diskInfo);
long long unsigned totalBlocks = diskInfo.f_bsize;
long long unsigned totalSize = (totalBlocks * diskInfo.f_blocks) >> 20;
long long unsigned freeDisk = (diskInfo.f_bfree * totalBlocks) >> 20;
long long unsigned usedDisk = totalSize - freeDisk;
double usage = (double)usedDisk / (double)totalSize * 100;
std::cout << "磁盘总大小: " << totalSize << " MB"
<< "\n空闲大小: " << freeDisk << " MB"
<< "\n已使用大小: " << usedDisk << " MB"
<< "\n使用率: " << usage << " %" << std::endl;
}
CPU使用率
原理:
读取/proc/stat
| 第一行的数据 | 解释 |
|---|---|
| user | 从系统启动开始累计到当前时刻，处于用户态的运行时间，不包含 nice值为负进程 |
| nice | 从系统启动开始累计到当前时刻，nice值为负的进程所占用的CPU时间 |
| system | 从系统启动开始累计到当前时刻，处于核心态的运行时间 |
| idle | 从系统启动开始累计到当前时刻，除IO等待时间以外的其它等待时间iowait (12256) 从系统启动开始累计到当前时刻，IO等待时间 |
| iowait | io等待时间 |
| irq | 从系统启动开始累计到当前时刻，硬中断时间 |
| softirq | 从系统启动开始累计到当前时刻，软中断时间 |
// Auther: IYATT-yx
#include <iostream>
#include <fstream>
extern "C"
{
#include <unistd.h>
}
int main()
{
while (true)
{
std::string cpu;
std::ifstream readCPU;
readCPU.open("/proc/stat", std::ifstream::in);
long unsigned user1, nice1, sys1, idle1, iowait1, irq1, softirq1, total1;
readCPU >> cpu >> user1 >> nice1 >> sys1 >> idle1 >> iowait1 >> irq1 >> softirq1;
readCPU.close();
sleep(1);
readCPU.open("/proc/stat", std::ifstream::in);
long unsigned user2, nice2, sys2, idle2, iowait2, irq2, softirq2, total2;
readCPU >> cpu >> user2 >> nice2 >> sys2 >> idle2 >> iowait2 >> irq2 >> softirq2;
readCPU.close();
sleep(1);
total1 = user1 + nice1 + sys1 + idle1 + iowait1 + irq1 + softirq1;
total2 = user2 + nice2 + sys2 + idle2 + iowait2 + irq2 + softirq2;
double usage = (double)(total2 - total1 - (idle2 - idle1)) / (double)(total2 - total1) * 100;
std::cout << "CPU使用率: " << usage << " %" << std::endl;
}
}
CPU温度
注: 仅在树莓派开发板,Raspberry Pi OS下测试过
// Auther: IYATT-yx
#include <iostream>
#include <fstream>
extern "C"
{
#include <unistd.h>
}
int main()
{
std::ifstream cpuTemp;
long temp;
while (true)
{
cpuTemp.open("/sys/class/thermal/thermal_zone0/temp", std::ifstream::in);
cpuTemp >> temp;
std::cout << "CPU温度为: " << temp / 1000.0 << std::endl;
cpuTemp.close();
sleep(1);
}
}
内存使用情况
// Auther: IYATT-yx
#include <iostream>
extern "C"
{
#include <sys/sysinfo.h>
#include <unistd.h>
}
struct sysinfo sysInfo;
int main()
{
system("clear");
while (true)
{
if (sysinfo(&sysInfo) != 0)
{
std::cerr << "sysinfo Error" << std::endl;
continue;
}
unsigned long totalRAM = sysInfo.totalram >> 20;
unsigned long freeRAM = sysInfo.freeram >> 20;
unsigned long usedRAM = totalRAM - freeRAM;
double usage = (double)usedRAM / (double)totalRAM * 100;
std::cout << "已使用内存大小: " << usedRAM << "MB"
<< "\n未使用内存大小: " << freeRAM << "MB"
<< "\n内存总大小: " << totalRAM << "MB"
<< "\n内存使用率: " << usage << " %" << std::endl;
sleep(1);
system("clear");
}
}