1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <unistd.h> 4 #include <string.h> 5 #define MAXBUFSIZE 1024 6 #define WAIT_SECOND 3 //暂停时间，单位为“秒” 7 typedef struct occupy 8 { 9 char name[20]; 10 unsigned int user; 11 unsigned int nice; 12 unsigned int system; 13 unsigned int idle; 14 } CPU_OCCUPY ; 15 16 typedef struct PACKED 17 { 18 char name[20]; 19 long total; 20 char name2[20]; 21 long free; 22 }MEM_OCCUPY; 23 24 float g_cpu_used; 25 int cpu_num; //定义一个全局的int类型cup_num 26 void cal_occupy(CPU_OCCUPY *, CPU_OCCUPY *); 27 void get_occupy(CPU_OCCUPY *); 28 void get_mem_occupy(MEM_OCCUPY *) ; 29 float get_io_occupy(); 30 void get_disk_occupy(char ** reused); 31 void getCurrentDownloadRates(long int * save_rate); 32 33 int main(){ 34 CPU_OCCUPY ocpu,ncpu; 35 MEM_OCCUPY mem; 36 37 //获取cpu核数 38 cpu_num = sysconf(_SC_NPROCESSORS_ONLN); 39 printf("cpu mum:%d\n",cpu_num); 40 41 //获取cpu使用率 42 get_occupy(&ocpu); 43 sleep(1); 44 get_occupy(&ncpu); 45 cal_occupy(&ocpu, &ncpu); 46 printf("cpu used:%4.2f \n", g_cpu_used); 47 48 //获取内存使用率 49 get_mem_occupy(&mem); 50 51 double using = ((double)(mem.total - mem.free)/mem.total)*100; 52 printf("mem used:%4.2f\n",using); 53 //获取io使用率 54 printf("io used:%4.2f\n",get_io_occupy()); 55 56 //获取当前磁盘的使用率 57 char t[20]=""; 58 char *used = t; 59 get_disk_occupy(&used); 60 61 //char used[20]=" " ; 62 //get_disk_occupy((char **)&used); 63 printf("disk used:%s\n",used); 64 65 //网络延迟 66 long int start_download_rates; //保存开始时的流量计数 67 long int end_download_rates; //保存结果时的流量计数 68 getCurrentDownloadRates(&start_download_rates);//获取当前流量，并保存在start_download_rates里 69 sleep(WAIT_SECOND); //休眠多少秒，这个值根据宏定义中的WAIT_SECOND的值来确定 70 getCurrentDownloadRates(&end_download_rates);//获取当前流量，并保存在end_download_rates里 71 printf("download is : %4.2f byte/s \n",( (float)(end_download_rates-start_download_rates))/WAIT_SECOND ); 72 } 73 void cal_occupy (CPU_OCCUPY *o, CPU_OCCUPY *n){ 74 double od, nd; 75 double id, sd; 76 double scale; 77 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 78 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 79 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 80 id = (double) (n->user - o->user); //用户第一次和第二次的时间之差再赋给id 81 sd = (double) (n->system - o->system);//系统第一次和第二次的时间之差再赋给sd 82 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 83 } 84 void get_occupy (CPU_OCCUPY *o) { 85 FILE *fd; 86 int n; 87 char buff[MAXBUFSIZE]; 88 fd = fopen ("/proc/stat", "r"); //这里只读取stat文件的第一行及cpu总信息，如需获取每核cpu的使用情况，请分析stat文件的接下来几行。 89 fgets (buff, sizeof(buff), fd); 90 sscanf (buff, "%s %u %u %u %u", o->name, &o->user, &o->nice,&o->system, &o->idle); 91 fclose(fd); 92 } 93 void get_mem_occupy(MEM_OCCUPY * mem){ 94 FILE * fd; 95 char buff[MAXBUFSIZE]; 96 fd = fopen("/proc/meminfo","r"); 97 fgets (buff, sizeof(buff), fd); 98 sscanf (buff, "%s %ld", mem->name,&mem->total); 99 fgets (buff, sizeof(buff), fd); 100 sscanf (buff, "%s %ld", mem->name2,&mem->free); 101 } 102 float get_io_occupy(){ 103 char cmd[] ="iostat -d -x"; 104 char buffer[MAXBUFSIZE]; 105 char a[20]; 106 float arr[20]; 107 FILE* pipe = popen(cmd, "r"); 108 if (!pipe) return -1; 109 fgets(buffer, sizeof(buffer), pipe); 110 fgets(buffer, sizeof(buffer), pipe); 111 fgets(buffer, sizeof(buffer), pipe); 112 fgets(buffer, sizeof(buffer), pipe); 113 sscanf(buffer,"%s %f %f %f %f %f %f %f %f %f %f %f %f %f ",a,&arr[0],&arr[1],&arr[2],&arr[3],&arr[4],&arr[5],&arr[6],&arr[7],&arr[8],&arr[9],&arr[10],&arr[11],&arr[12]); 114 //printf("%f\n",arr[12]); 115 return arr[12]; 116 pclose(pipe); 117 } 118 void get_disk_occupy(char ** reused){ 119 char currentDirectoryPath[ MAXBUFSIZE ]; 120 getcwd(currentDirectoryPath, MAXBUFSIZE); 121 //printf("当前目录：%s\n",currentDirectoryPath); 122 char cmd[50]="df "; 123 strcat(cmd,currentDirectoryPath); 124 //printf("%s\n",cmd); 125 126 char buffer[MAXBUFSIZE]; 127 FILE* pipe = popen(cmd, "r"); 128 char fileSys[20]; 129 char blocks[20]; 130 char used[20]; 131 char free[20]; 132 char percent[10]; 133 char moment[20]; 134 135 if (!pipe) return ; 136 if(fgets(buffer, sizeof(buffer), pipe)!=NULL){ 137 sscanf(buffer,"%s %s %s %s %s %s",fileSys,blocks,used,free,percent,moment); 138 } 139 if(fgets(buffer, sizeof(buffer), pipe)!=NULL){ 140 sscanf(buffer,"%s %s %s %s %s %s",fileSys,blocks,used,free,percent,moment); 141 } 142 //printf("desk used:%s\n",percent); 143 strcpy(*reused,percent); 144 return ; 145 } 146 147 void getCurrentDownloadRates(long int * save_rate) 148 { 149 char intface[] = "eth0:"; //这是网络接口名，根据主机配置 150 //char intface[] = "wlan0:"; 151 FILE * net_dev_file; 152 char buffer[1024]; 153 size_t bytes_read; 154 char * match; 155 if ( (net_dev_file=fopen("/proc/net/dev", "r")) == NULL ) 156 { 157 printf("open file /proc/net/dev/ error!\n"); 158 exit(EXIT_FAILURE); 159 } 160 161 int i = 0; 162 while(i++<20){ 163 if(fgets(buffer, sizeof(buffer), net_dev_file)!=NULL){ 164 if(strstr(buffer,intface)!=NULL){ 165 //printf("%d %s\n",i,buffer); 166 sscanf(buffer,"%s %ld",buffer,save_rate); 167 break; 168 } 169 } 170 } 171 if(i==20) *save_rate=0.01; 172 fclose(net_dev_file); //关闭文件 173 return ; 174 }
打印结果
cpu mum:4 cpu used:1.25 mem used:70.30 io used:0.10 disk used:4% download is : 4963.33 byte/s