Linux sysinfo函数、结构体使用

linux中，可以使用sysinfo来获取系统的相关信息。

函数声明和原型：

#include

int sysinfo(struct sysinfo *info);

Linux2.3.23（i386），2.3.48（all architectures）

struct sysinfo {  
      long uptime;          /* 启动到现在经过的时间 */  
      unsigned long loads[3];    
      /* 1, 5, and 15 minute load averages */  
      unsigned long totalram;  /* 总的可用的内存大小 */  
      unsigned long freeram;   /* 还未被使用的内存大小 */  
      unsigned long sharedram; /* 共享的存储器的大小*/  
      unsigned long bufferram; /* 共享的存储器的大小 */  
      unsigned long totalswap; /* 交换区大小 */  
      unsigned long freeswap;  /* 还可用的交换区大小 */  
      unsigned short procs;    /* 当前进程数目 */  
      unsigned long totalhigh; /* 总的高内存大小 */  
      unsigned long freehigh;  /* 可用的高内存大小 */  
      unsigned int mem_unit;   /* 以字节为单位的内存大小 */  
      char _f[20-2*sizeof(long)-sizeof(int)];   
      /* libc5的补丁  
};  

返回值，成功返回0 ，失败返回-1

样例：

#include   
  
#include      /* 包含sysinfo结构体信息*/  
  
 
//using namespace std;  
  
  
int main(int argc, char *agrv[])  
  
{  
  
struct sysinfo s_info;  
  
int error;  
  
  
error = sysinfo(&s_info);  
  
printf("\n\ncode error=%d\n",error);  
  
printf("Uptime = %ds\nLoad: 1 min%d / 5 min %d / 15 min %d\n"  
  
  "RAM: total %d / free %d /shared%d\n"  
  
  "Memory in buffers = %d\nSwap:total%d/free%d\n"  
  
  "Number of processes = %d\n",  
  
  s_info.uptime, s_info.loads[0],  
  
  s_info.loads[1], s_info.loads[2],  
  
  s_info.totalram, s_info.freeram,  
  
  s_info.totalswap, s_info.freeswap,  
  
  s_info.procs);  
  
  
return 0;  
  
}  

输出结果：

#/home/chenhd/future> ./Sysinfo_1  
  
code error=0  
  
Uptime = 154s  
  
Load: 1 min22976 / 5 min 13888 / 15 min 5408  
  
RAM: total 128307200 / free 55656448 /shared263168000  
  
Memory in buffers = 263168000  
  
Swap:total50/free1073821804  
  
Number of processes = 1073823352  
  
#/home/chenhd/future>