C/C++ 实现获取Linux系统参数

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C/C++ 实现获取Linux系统参数

今天忙活了半天，在Linux平台下，总算可以获取到一些性能指标了，结果，Linux上面的数据发送到Windows上面会出现发送为空的现象，可能是Socket套接字存在问题，不搞了。

#include <iostream>
#include <unistd.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <string.h>
#include <errno.h>#define SERV_PORT 8888
#define SERV_IP "0.0.0.0"using namespace std;// --------------------------------------------------
float g_cpu_used;typedef struct
{char name[20];unsigned int user;unsigned int nice;unsigned int system;unsigned int idle;
} CPU_OCCUPY;typedef struct
{char Used[32];char Avg1[32];char Avg5[32];char Avg15[32];
} cpu_info;// 得到CPU利用率百分比
void cal_occupy(CPU_OCCUPY *o, CPU_OCCUPY *n)
{double od, nd;double id, sd;double scale;od = (double)(o->user + o->nice + o->system + o->idle); // 第一次(用户+优先级+系统+空闲)的时间再赋给od  nd = (double)(n->user + n->nice + n->system + n->idle); // 第二次(用户+优先级+系统+空闲)的时间再赋给od  scale = 100.0 / (float)(nd - od);                       // 100除强制转换(nd-od)之差为float类型再赋给scale这个变量  id = (double)(n->user - o->user);                       // 用户第一次和第二次的时间之差再赋给id  sd = (double)(n->system - o->system);                   // 系统第一次和第二次的时间之差再赋给sd  g_cpu_used = ((sd + id)*100.0) / (nd - od);             // ((用户+系统)乖100)除(第一次和第二次的时间差)再赋给g_cpu_used  
}// 计算CPU差值
void get_occupy(CPU_OCCUPY *o)
{FILE *fd;int n;char buff[1024] = {0};fd = fopen("/proc/stat", "r");fgets(buff, sizeof(buff), fd);sscanf(buff, "%s %u %u %u %u", o->name, &o->user, &o->nice, &o->system, &o->idle);fclose(fd);
}// 获取CPU利用率并返回字典
char * GetCpuInfo()
{cpu_info ptr;CPU_OCCUPY ocpu, ncpu;char buffer[1024] = {0};char ref_buffer[4096] = {0};// 获取cpu使用率get_occupy(&ocpu);sleep(1);get_occupy(&ncpu);cal_occupy(&ocpu, &ncpu);sprintf(ptr.Used,"%.2f",g_cpu_used);// 获取系统负载FILE *pipe = popen("cat /proc/loadavg","r");fgets(buffer,sizeof(buffer),pipe);sscanf(buffer,"%s %s %s", ptr.Avg1, ptr.Avg5, ptr.Avg15);// std::cout << "Used = " << ptr.Used << " Avg1 = " << ptr.Avg1 << " Avg5 = " << ptr.Avg5 << " Avg15 = " << ptr.Avg15 << std::endl;sprintf(ref_buffer, "{ 'platform': 'Centos', 'Used': %s, 'Avg1': %s, 'Avg5': %s, 'Avg15': %s }",ptr.Used, ptr.Avg1, ptr.Avg5, ptr.Avg15);pclose(pipe);return ref_buffer;
}// --------------------------------------------------
typedef struct
{char Total[32];char Free[32];char Available[32];
}mem_info;// 获取内存利用率
char * GetMemoryInfo()
{mem_info ptr;char buffer[1024] = {0};char ref_buffer[4096] = {0};FILE *pipe = popen("cat /proc/meminfo","r");for(int x=0; x<3; x++){if(x == 0){fgets(buffer,sizeof(buffer),pipe);sscanf(buffer,"%s %s", ptr.Total, ptr.Total);}else if(x == 1){fgets(buffer,sizeof(buffer),pipe);sscanf(buffer,"%s %s", ptr.Free, ptr.Free);}else if(x == 2){fgets(buffer,sizeof(buffer),pipe);sscanf(buffer,"%s %s", ptr.Available, ptr.Available);}}// std::cout << "Total = " << ptr.Total << " Free = " << ptr.Free << " Available = " << ptr.Available << std::endl;sprintf(ref_buffer,"{ 'platform': 'Centos' , 'Total': %s , 'Free': %s , 'Available': %s }",ptr.Total , ptr.Free, ptr.Available);pclose(pipe);return ref_buffer;
}// --------------------------------------------------typedef struct
{char none[32];char mount[128];char used[32];
}disk_info;char * GetDiskInfo()
{disk_info ptr;char buffer[1024] = {0};char ref_buffer[4096]={0};FILE *pipe = popen("df","r");int x=0 , y=0;strcat(ref_buffer,"{ 'platform': 'Centos', 'value': [ ");for(; fgets(buffer,sizeof(buffer),pipe)!=NULL; y++){char tulp[1024] = {0};if(y<1){continue;}sscanf(buffer,"%s %s %s %s %s %s",ptr.none, ptr.none, ptr.none, ptr.none, ptr.used, ptr.mount);// std::cout << "Used = " << ptr.used << " mount = " << ptr.mount << std::endl;sprintf(tulp,"('%s','%s'),",ptr.mount, ptr.used);strcat(ref_buffer,tulp);x++;}strcat(ref_buffer," ]}");std::cout << ref_buffer << std::endl;pclose(pipe);return ref_buffer;
}// --------------------------------------------------
char * GetProcessInfo(char *szProcessName)
{char buffer[1024] = {0};char ref_buffer[4096]={0};sprintf(buffer,"ps aux | grep '%s' | grep -v 'grep' | awk {'print $2'}",szProcessName);FILE *pipe = popen(buffer, "r");char tmp[32]={0};fgets(tmp,sizeof(tmp),pipe);if(strlen(tmp)==0){return (char *)"{ 'platform': 'Centos', 'flag':'false' }";}else{return (char *)"{ 'platform': 'Centos', 'flag':'true' }";}
}char *GetPing()
{return "{ 'platform': 'Centos', 'flag':'true' }";
}