获取CPU，内存使用率，磁盘相关信息

 CPU信息

bool get_cpuoccupy(CPU_OCCUPY *cpust) //对无类型get函数含有一个形参结构体类弄的指针O{FILE *fd;char buff[256];CPU_OCCUPY *cpu_occupy;cpu_occupy = cpust;if ((fd = fopen("/proc/stat", "r")) <= 0)return false;memset(buff, 0, 256);fgets(buff, sizeof(buff), fd);sscanf(buff, "%s %u %u %u %u", cpu_occupy->name, &cpu_occupy->user,&cpu_occupy->nice, &cpu_occupy->system, &cpu_occupy->idle);fclose(fd);return true;}//获取CPU频率 MHZbool get_cpu_info(unsigned int *total){FILE *fd;char buff[256];char name[128], Hz[128], tmp[128];char *p;*total = 0;if ((fd = fopen("/proc/cpuinfo", "r")) <= 0)return false;memset(buff, 0, 256);for (int i = 0; i < 7; i++){fgets(buff, sizeof(buff), fd);}sscanf(buff, "%s %s %s %s", name, Hz, tmp, tmp);p = strtok(tmp, ".");*total = atoi(p);fclose(fd);return true;}

计算CPU使用率

int cal_cpuoccupy(CPU_OCCUPY *o, CPU_OCCUPY *n){unsigned long oldtatal, newtotal;unsigned long id, sd, nd;int cpu_use = 0;oldtatal = (unsigned long) (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odnewtotal = (unsigned long) (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odid = (unsigned long) (n->user - o->user); //用户第一次和第二次的时间之差再赋给idnd = (unsigned long) (n->nice - o->nice);sd = (unsigned long) (n->system - o->system);//系统第一次和第二次的时间之差再赋给sdif ((newtotal - oldtatal) != 0)cpu_use = (int) ((sd + id + nd) * 10000) / (newtotal - oldtatal); //((用户+系统)乖100)除(第一次和第二次的时间差)再赋给g_cpu_usedelsecpu_use = 0;return cpu_use;}

内存信息

 

bool get_memoccupy(MEM_OCCUPY *mem) //对无类型get函数含有一个形参结构体类弄的指针O{FILE *fd;char buff[256], tmp[20];MEM_OCCUPY *m;m = mem;if ((fd = fopen("/proc/meminfo", "r")) <= 0){return false;}memset(buff, 0, 256);fgets(buff, sizeof(buff), fd);sscanf(buff, "%s %lu %s", m->name, &m->total, tmp);memset(buff, 0, 256);fgets(buff, sizeof(buff), fd); //从fd文件中读取长度为buff的字符串再存到起始地址为buff这个空间里sscanf(buff, "%s %lu %s", m->name2, &m->free, tmp);fclose(fd); //关闭文件fdreturn true;}

 调用函数

bool qury_sys_resource(char *buf){CPU_OCCUPY cpu_stat1;CPU_OCCUPY cpu_stat2;MEM_OCCUPY mem_stat;unsigned int cpu_MHZ;char xml[1024];int cpu_used, memused;float cpu_use_per = 0;memset(&cpu_stat1, 0, sizeof(cpu_stat1));memset(&cpu_stat2, 0, sizeof(cpu_stat2));memset(&mem_stat, 0, sizeof(mem_stat));memset(xml, 0, 1024);//第一次获取cpu使用情况if (!get_cpuoccupy((CPU_OCCUPY *) &cpu_stat1)){if (debug_level){cout << "get cpu stat err!" << endl;}sprintf(buf,"HTTP/1.1 500 Server err \nServer:Brainaire \nConnection: close \nContent-Type:text/html; charset=UTF-8 \n \n");return false;}//获取内存if (!get_memoccupy((MEM_OCCUPY *) &mem_stat)){if (debug_level){cout << "get memery stat err!" << endl;}sprintf(buf,"HTTP/1.1 500 Server err \nServer:Brainaire \nConnection: close \nContent-Type:text/html; charset=UTF-8 \n \n");return false;}if (!get_cpu_info(&cpu_MHZ)){if (debug_level){cout << "get cpu info err!" << endl;}sprintf(buf,"HTTP/1.1 500 Server err \nServer:Brainaire \nConnection: close \nContent-Type:text/html; charset=UTF-8 \n \n");return false;}sleep(1);//第二次获取cpu使用情况if (!get_cpuoccupy((CPU_OCCUPY *) &cpu_stat2)){if (debug_level){cout << "get cpu stat err!" << endl;}sprintf(buf,"HTTP/1.1 500 Server err \nServer:Brainaire \nConnection: close \nContent-Type:text/html; charset=UTF-8 \n \n");return false;}//计算cpu使用率cpu_used = cal_cpuoccupy((CPU_OCCUPY *) &cpu_stat1,(CPU_OCCUPY *) &cpu_stat2);cpu_use_per = (float) (cpu_used / 100.0);//memery usedif ((mem_stat.total - mem_stat.free) == 0){memused = 100;}else{memused = (int) ((mem_stat.total - mem_stat.free) * 100/ mem_stat.total);}sprintf(xml,"<Message>\n    <Cpu  Total=”%d”  Used=”%3.1f” /> \n    <Memory  Total=”%ld”  Used=”%d” />\n</Message>",cpu_MHZ, cpu_use_per, mem_stat.total / 1024, memused);sprintf(buf,"HTTP/1.1 200 OK \nServer:Brainaire \nConnection: close \nContent-type: xml/text;  \nContent-Length:%d \n \n%s",strlen(xml), xml);if (debug_level){cout << "memery total: " << mem_stat.total / 1024 << ",  used: "<< memused << endl;cout << "cpu used = " << cpu_use_per << "%" << endl;cout << buf;}return true;}

 

 获取磁盘分区情况

int get_disk_rw(const char *disk_name){FILE *fd;char tmp[256], name[256], a[256], flag[256];if ((fd = fopen("/etc/mtab", "r")) <= 0){if (debug_level){perror("/etc/mtab");}return 0;}while (fgets(tmp, sizeof(tmp), fd)){memset(flag, 0, sizeof(flag));sscanf(tmp, "%s %s %s %s", name, a, a, flag);if (strcmp(name, disk_name) == 0){//cout<<flag<<endl;for (int i = 0; i < 256; i++){if ((flag[i] == 'r' && ((flag[i + 1] == 'o') || flag[i + 1]== ',' || flag[i + 1] == '\0'))){return 1;}if (flag[i + 1] == '\0'){return 0;}}}}return 0;}void qury_single_disk_info(const char *disk_path, char *buf){FILE *fd;char tmp[256], name[256];unsigned long long total, used, avail;float ftotal, favail;if (!(fd = popen("df", "r"))){sprintf(buf,"HTTP/1.1 500 Server err \nServer:Brainaire \nConnection: close \nContent-Type:text/html; charset=UTF-8 \n \n");return;}while (fgets(tmp, sizeof(tmp), fd)){sscanf(tmp, "%s %llu %llu %llu", name, &total, &used, &avail);if (strcmp(disk_path, name) == 0){ftotal = (float) (total / 1000000.0);favail = (float) (avail / 1000000.0);sprintf(tmp,"<Message>\n    <DiskList>\n        <Disk Path=\"%s\" Status=\"%d\"  TotalSpace=\"%0.2f\"  FreeSpace=\"%0.2f\"/>\n    </DiskList>\n</Message>",disk_path, get_disk_rw(disk_path), ftotal, favail);sprintf(buf,"HTTP/1.1 200 OK\nServer:Brainaire\nConnection: close\nContent-type: xml/text; \nContent-Length:%d\n\n%s",strlen(tmp), tmp);if (debug_level)cout << buf << endl;return;}}sprintf(tmp, "<Message>\n    <DiskList>\n    </DiskList>\n</Message>");sprintf(buf,"HTTP/1.1 200 OK \nServer:Brainaire \nConnection: close \nContent-type: xml/text;  \nContent-Length:%d \n \n%s",strlen(tmp), tmp);return;}void qury_all_disk_info(char *buf){FILE *fd;char tmp[256], name[256], res_buf[MAX_BUF_SIZE];unsigned long long total, used, avail;float ftotal, favail;memset(res_buf, 0, MAX_BUF_SIZE);if (!(fd = popen("df", "r"))){sprintf(buf,"HTTP/1.1 500 Server err \nServer:Brainaire \nConnection: close \nContent-Type:text/html; charset=UTF-8 \n \n");return;}sprintf(res_buf, "<Message>\n    <DiskList>\n");fgets(tmp, sizeof(tmp), fd);while (fgets(tmp, sizeof(tmp), fd)){sscanf(tmp, "%s %llu %llu %llu", name, &total, &used, &avail);ftotal = (float) (total / 1000000.0);favail = (float) (avail / 1000000.0);sprintf(res_buf + strlen(res_buf),"        <Disk Path=\"%s\" Status=\"%d\"  TotalSpace=\"%0.2f\"  FreeSpace=\"%0.2f\"/>\n",name, get_disk_rw(name), ftotal, favail);}sprintf(res_buf + strlen(res_buf), "    </DiskList>\n</Message>");sprintf(buf,"HTTP/1.1 200 OK\nServer:Brainaire\nConnection: close\nContent-type: xml/text; \nContent-Length:%d\n\n%s",strlen(res_buf), res_buf);if (debug_level)cout << buf << endl;return;}