1 /* 2 * ===================================================================================== 3 * 4 * Filename: proc_more.c 5 * 6 * Description: 7 * 8 * Version: 1.0 9 * Created: 2013年08月07日 11时34分40秒 10 * Revision: none 11 * Compiler: gcc 12 * 13 * Author: linkscue (scue), linkscue@gmail.com 14 * Organization: 15 * 16 * ===================================================================================== 17 */ 18 19 #include20 #include 21 #include 22 #include 23 #include 24 #include 25 #include 26 #include <string.h> 27 void sampleLoadAvg(){ 28 int f=0; 29 char buffer[80]=""; /* 定义字符串并初始化为'\0' */ 30 char buf[5][10]; 31 char *file="/proc/loadavg"; 32 f = open(file, O_RDONLY); 33 if (f == 0) 34 { 35 printf("error to open: %s\n", file); 36 exit(EXIT_FAILURE); 37 } 38 read(f, (void *)buffer, 80); 39 sscanf(buffer, "%s %s %s %s %s", /* sscanf()拆分成多个字符串 */ 40 &buf[0],&buf[1],&buf[2],&buf[3],&buf[4]); 41 printf("一分钟平均负载：%s\n", buf[0]); 42 printf("五分钟平均负载：%s\n", buf[1]); 43 printf("一刻钟平均负载：%s\n", buf[2]); 44 printf("采样时刻的间隔：%s\n", buf[3]); 45 printf("最大线程的数目：%s\n", buf[4]); 46 close(f); 47 } 48 void sampleTime(){ 49 int f=0; 50 char buffer[80]=""; 51 char buf[2][10]; 52 float seconds=0; 53 float secondr=0; 54 char *file="/proc/uptime"; 55 f = open(file, O_RDONLY); 56 if (f == 0) 57 { 58 printf("error to open: %s\n", file); 59 exit(EXIT_FAILURE); 60 } 61 read(f, (void *)buffer, 80); 62 sscanf(buffer, "%s %s", &buf[0], &buf[1]); 63 close(f); 64 printf("系统运行时间：\t%s秒\n", buf[0]); 65 printf("系统空闲时间：\t%s秒\n", buf[1]); 66 close(f); 67 seconds=strtof(buf[0],NULL); 68 secondr=strtof(buf[1],NULL); 69 printf("系统运行时间：\td天d时d分.6f秒\n", 70 (int)seconds/(24*3600), /* 天 */ 71 ((int)seconds/(3600))%(24), /* 时 */ 72 ((int)seconds/60)%60, /* 分 */ 73 ((int)seconds%60)+(seconds-(int)seconds)); /* 秒(精确至毫秒) */ 74 printf("系统空闲时间：\td天d时d分.6f秒\n", 75 (int)secondr/(24*3600), /* 天 */ 76 ((int)secondr/(3600))%(24), /* 时 */ 77 ((int)secondr/60)%60, /* 分 */ 78 ((int)secondr%60)+(secondr-(int)secondr)); /* 秒(精确至毫秒) */ 79 } 80 81 void sampleKernelVersion(){ 82 int f=0; 83 char buffer[80]=""; 84 char *file="/proc/sys/kernel/version"; 85 f = open(file, O_RDONLY); 86 if (f == 0) 87 { 88 printf("error to open: %s\n", file); 89 exit(EXIT_FAILURE); 90 } 91 read(f, (void *)buffer, 80); 92 buffer[strlen(buffer)-1]=0; /* 简单实现tr()函数的功能 */ 93 printf("当前内核版本：\t%s\n", buffer); 94 close(f); 95 } 96 97 void sampleOsRelease(){ 98 int f=0; 99 char buffer[80]="";100 char *file="/proc/sys/kernel/osrelease";101 f = open(file, O_RDONLY);102 if (f == 0)103 {104 printf("error to open: %s\n", file);105 exit(EXIT_FAILURE);106 }107 read(f, (void *)buffer, 80);108 buffer[strlen(buffer)-1]=0;109 printf("当前发行版本：\t%s\n", buffer);110 close(f);111 }112 113 void sampleOsType(){114 int f=0;115 char buffer[80]="";116 char *file="/proc/sys/kernel/ostype";117 f = open(file, O_RDONLY);118 if (f == 0)119 {120 printf("error to open: %s\n", file);121 exit(EXIT_FAILURE);122 }123 read(f, (void *)buffer, 80);124 buffer[strlen(buffer)-1]=0;125 printf("当前操作系统：\t%s\n", buffer);126 close(f);127 }128 129 void sampleDiskStat(){130 int i;131 FILE *fp;132 int nread=0;133 ssize_t len = 0;134 char *buffer=NULL;135 char buf[20][32];136 char *file="/proc/diskstats";137 char *p;138 fp = fopen(file, "rb");139 if (fp == NULL)140 {141 printf("error to open: %s\n", file);142 exit(EXIT_FAILURE);143 }144 printf(" 磁盘 读次数 写次数\n");145 while((nread = getline(&buffer, &len, fp)) != -1) { /* 简单实现读行的功能 */146 sscanf(buffer, "ss%s %s %s %s %s %s %s %s %s %s %s %s", 147 &buf[0],&buf[1],&buf[2],&buf[3],&buf[4],&buf[5],&buf[6],148 &buf[7],&buf[8],&buf[9],&buf[10],&buf[11],&buf[12],&buf[13]);149 if ((p=strstr(buf[2], "loop"))!=NULL)150 {151 ; /* loop本地回路不作操作 */152 }153 else {154 printf("sss\n", 155 &buf[2],&buf[3], &buf[7]);156 }157 }158 }159 160 void sampleProcesses(void)161 {162 FILE *fp;163 int nread=0;164 ssize_t len = 0;165 char *buf=NULL;166 char *buffer=NULL;167 char *file="/proc/stat";168 fp = fopen(file, "rb");169 if (fp == NULL)170 {171 printf("error to open: %s\n", file);172 exit(EXIT_FAILURE);173 }174 while((nread = getline(&buffer, &len, fp)) != -1) {175 if((buf=strstr(buffer, "processes"))!=NULL) /* 简单实现grep的功能 */176 break;177 }178 buffer[strlen(buffer)-1]=0; /* 简单实现tr()函数的功能 */179 char count[16]="";180 sscanf(buffer, "%s%s", count, count);181 printf("执行线程数目:\t%s\n", count);182 }183 184 void sampleContext(void)185 {186 FILE *fp;187 int nread=0;188 ssize_t len = 0;189 char *buf=NULL;190 char *buffer=NULL;191 char *file="/proc/stat";192 fp = fopen(file, "rb");193 if (fp == NULL)194 {195 printf("error to open: %s\n", file);196 exit(EXIT_FAILURE);197 }198 while((nread = getline(&buffer, &len, fp)) != -1) {199 if((buf=strstr(buffer, "ctxt"))!=NULL) /* 简单实现grep的功能 */200 break;201 }202 buffer[strlen(buffer)-1]=0; /* 简单实现tr()函数的功能 */203 char count[16]="";204 sscanf(buffer, "%s%s", count, count);205 printf("上下文切换次数:\t%s\n", count);206 }207 208 void sampleMeminfo()209 {210 FILE *fp;211 int nread=0;212 ssize_t len = 0;213 char *buf=NULL;214 char *buffer=NULL;215 char *file="/proc/meminfo";216 char content[16]="";217 fp = fopen(file, "rb");218 if (fp == NULL)219 {220 printf("error to open: %s\n", file);221 exit(EXIT_FAILURE);222 }223 while((nread = getline(&buffer, &len, fp)) != -1) {224 if((buf=strstr(buffer, "MemTotal"))!=NULL) /* 简单实现grep的功能 */225 {226 buffer[strlen(buffer)-1]=0; /* 简单实现tr()函数的功能 */227 sscanf(buffer, "%s%s", content, content);228 int memtotal_kb=(int)(strtof(content, NULL));229 printf("内存总容量:\t%dGMM MK\n",230 memtotal_kb/(1024*1024), /* Gb */231 (memtotal_kb/(1024))%1024, /* Mb */232 (memtotal_kb%(1024*1024))%1024); /* Kb */233 }234 if((buf=strstr(buffer, "MemFree"))!=NULL) /* 简单实现grep的功能 */235 {236 buffer[strlen(buffer)-1]=0; /* 简单实现tr()函数的功能 */237 sscanf(buffer, "%s%s", content, content);238 int memfree_kb=(int)(strtof(content, NULL));239 printf("内存可用容量:\t%dGMM MK\n",240 memfree_kb/(1024*1024), /* Gb */241 (memfree_kb/(1024))%1024, /* Mb */242 (memfree_kb%(1024*1024))%1024); /* Kb */243 }244 if((buf=strstr(buffer, "SwapTotal"))!=NULL) /* 简单实现grep的功能 */245 {246 buffer[strlen(buffer)-1]=0; /* 简单实现tr()函数的功能 */247 sscanf(buffer, "%s%s", content, content);248 int swaptotal_kb=(int)(strtof(content, NULL));249 printf("SWAP总容量:\t%dGMM MK\n",250 swaptotal_kb/(1024*1024), /* Gb */251 (swaptotal_kb/(1024))%1024, /* Mb */252 (swaptotal_kb%(1024*1024))%1024); /* Kb */253 }254 if((buf=strstr(buffer, "SwapFree"))!=NULL) /* 简单实现grep的功能 */255 {256 buffer[strlen(buffer)-1]=0; /* 简单实现tr()函数的功能 */257 sscanf(buffer, "%s%s", content, content);258 int swapfree_kb=(int)(strtof(content, NULL));259 printf("SWAP可用容量:\t%dGMM MK\n",260 swapfree_kb/(1024*1024), /* Gb */261 (swapfree_kb/(1024))%1024, /* Mb */262 (swapfree_kb%(1024*1024))%1024); /* Kb */263 break; /* 所需的信息已满足，退出循环 */264 }265 }266 }267 /* 268 * === FUNCTION ======================================================================269 * Name: main270 * Description: 271 * =====================================================================================272 */273 int main ( int argc, char *argv[] )274 {275 printf(">>>系统负载<<<\n");276 sampleLoadAvg();277 printf("----------------------------------------\n");278 printf("\n");279 printf(">>>运行时间<<<\n");280 sampleTime();281 printf("\n");282 printf(">>>版本信息<<<\n");283 sampleOsType();284 sampleOsRelease();285 sampleKernelVersion();286 printf("----------------------------------------\n");287 printf("\n");288 printf(">>>磁盘信息<<<\n");289 sampleDiskStat();290 printf("----------------------------------------\n");291 printf("\n");292 printf(">>>上下文切换<<<\n");293 sampleContext();294 printf("----------------------------------------\n");295 printf("\n");296 printf(">>>线程数目<<<\n");297 sampleProcesses();298 printf("----------------------------------------\n");299 printf("\n");300 printf(">>>内存信息<<<\n");301 sampleMeminfo();302 printf("----------------------------------------\n");303 return EXIT_SUCCESS;304 }
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