303 lines
9.9 KiB
C
303 lines
9.9 KiB
C
/* =====================================================================================
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*
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* Filename: proc_more.c
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*
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* Description:
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*
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* Version: 1.0
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* Created: 2013年08月07日 11时34分40秒
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* Revision: none
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* Compiler: gcc
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*
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* Author: linkscue (scue), linkscue@gmail.com
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* Organization:
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*
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* =====================================================================================*/
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#include <stdio.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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void sampleLoadAvg(){
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int f=0;
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char buffer[80]=""; /* 定义字符串并初始化为'\0' */
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char buf[5][10];
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char *file="/proc/loadavg";
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f = open(file, O_RDONLY);
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if (f == 0)
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{
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printf("error to open: %s\n", file);
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exit(EXIT_FAILURE);
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}
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read(f, (void *)buffer, 80);
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sscanf(buffer, "%s %s %s %s %s", /* sscanf()拆分成多个字符串 */
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&buf[0],&buf[1],&buf[2],&buf[3],&buf[4]);
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printf("一分钟平均负载：%s\n", buf[0]);
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printf("五分钟平均负载：%s\n", buf[1]);
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printf("一刻钟平均负载：%s\n", buf[2]);
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printf("采样时刻的间隔：%s\n", buf[3]);
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printf("最大线程的数目：%s\n", buf[4]);
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close(f);
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}
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void sampleTime(){
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int f=0;
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char buffer[80]="";
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char buf[2][10];
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float seconds=0;
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float secondr=0;
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char *file="/proc/uptime";
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f = open(file, O_RDONLY);
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if (f == 0)
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{
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printf("error to open: %s\n", file);
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exit(EXIT_FAILURE);
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}
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read(f, (void *)buffer, 80);
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sscanf(buffer, "%s %s", &buf[0], &buf[1]);
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close(f);
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printf("系统运行时间：\t%s秒\n", buf[0]);
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printf("系统空闲时间：\t%s秒\n", buf[1]);
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close(f);
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seconds=strtof(buf[0],NULL);
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secondr=strtof(buf[1],NULL);
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printf("系统运行时间：\t%03d天%02d时%02d分%02.6f秒\n",
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(int)seconds/(24*3600), /* 天 */
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((int)seconds/(3600))%(24), /* 时 */
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((int)seconds/60)%60, /* 分 */
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((int)seconds%60)+(seconds-(int)seconds)); /* 秒(精确至毫秒) */
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printf("系统空闲时间：\t%03d天%02d时%02d分%02.6f秒\n",
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(int)secondr/(24*3600), /* 天 */
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((int)secondr/(3600))%(24), /* 时 */
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((int)secondr/60)%60, /* 分 */
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((int)secondr%60)+(secondr-(int)secondr)); /* 秒(精确至毫秒) */
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}
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void sampleKernelVersion(){
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int f=0;
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char buffer[80]="";
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char *file="/proc/sys/kernel/version";
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f = open(file, O_RDONLY);
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if (f == 0)
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{
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printf("error to open: %s\n", file);
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exit(EXIT_FAILURE);
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}
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read(f, (void *)buffer, 80);
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buffer[strlen(buffer)-1]=0; /* 简单实现tr()函数的功能 */
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printf("当前内核版本：\t%s\n", buffer);
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close(f);
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}
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void sampleOsRelease(){
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int f=0;
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char buffer[80]="";
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char *file="/proc/sys/kernel/osrelease";
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f = open(file, O_RDONLY);
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if (f == 0)
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{
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printf("error to open: %s\n", file);
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exit(EXIT_FAILURE);
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}
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read(f, (void *)buffer, 80);
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buffer[strlen(buffer)-1]=0;
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printf("当前内核发行版本：\t%s\n", buffer);
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close(f);
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}
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void sampleOsType(){
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int f=0;
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char buffer[80]="";
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char *file="/proc/sys/kernel/ostype";
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f = open(file, O_RDONLY);
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if (f == 0)
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{
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printf("error to open: %s\n", file);
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exit(EXIT_FAILURE);
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}
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read(f, (void *)buffer, 80);
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buffer[strlen(buffer)-1]=0;
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printf("当前操作系统内核：\t%s\n", buffer);
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close(f);
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}
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void sampleDiskStat(){
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int i;
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FILE *fp;
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int nread=0;
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ssize_t len = 0;
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char *buffer=NULL;
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char buf[20][32];
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char *file="/proc/diskstats";
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char *p;
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fp = fopen(file, "rb");
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if (fp == NULL)
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{
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printf("error to open: %s\n", file);
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exit(EXIT_FAILURE);
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}
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printf(" 磁盘 读次数 写次数\n");
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while((nread = getline(&buffer, &len, fp)) != -1) { /* 简单实现读行的功能 */
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sscanf(buffer, "%04s%08s%s %s %s %s %s %s %s %s %s %s %s %s",
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&buf[0],&buf[1],&buf[2],&buf[3],&buf[4],&buf[5],&buf[6],
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&buf[7],&buf[8],&buf[9],&buf[10],&buf[11],&buf[12],&buf[13]);
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if ((p=strstr(buf[2], "loop"))!=NULL)
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{
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; /* loop本地回路不作操作 */
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}
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else {
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printf("%06s%08s%08s\n",
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&buf[2],&buf[3], &buf[7]);
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}
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}
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}
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void sampleProcesses(void)
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{
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FILE *fp;
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int nread=0;
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ssize_t len = 0;
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char *buf=NULL;
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char *buffer=NULL;
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char *file="/proc/stat";
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fp = fopen(file, "rb");
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if (fp == NULL)
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{
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printf("error to open: %s\n", file);
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exit(EXIT_FAILURE);
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}
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while((nread = getline(&buffer, &len, fp)) != -1) {
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if((buf=strstr(buffer, "processes"))!=NULL) /* 简单实现grep的功能 */
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break;
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}
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buffer[strlen(buffer)-1]=0; /* 简单实现tr()函数的功能 */
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char count[16]="";
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sscanf(buffer, "%s%s", count, count);
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printf("执行线程数目:\t%s\n", count);
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}
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void sampleContext(void)
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{
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FILE *fp;
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int nread=0;
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ssize_t len = 0;
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char *buf=NULL;
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char *buffer=NULL;
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char *file="/proc/stat";
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fp = fopen(file, "rb");
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if (fp == NULL)
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{
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printf("error to open: %s\n", file);
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exit(EXIT_FAILURE);
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}
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while((nread = getline(&buffer, &len, fp)) != -1) {
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if((buf=strstr(buffer, "ctxt"))!=NULL) /* 简单实现grep的功能 */
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break;
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}
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buffer[strlen(buffer)-1]=0; /* 简单实现tr()函数的功能 */
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char count[16]="";
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sscanf(buffer, "%s%s", count, count);
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printf("上下文切换次数:\t%s\n", count);
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}
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void sampleMeminfo()
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{
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FILE *fp;
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int nread=0;
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ssize_t len = 0;
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char *buf=NULL;
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char *buffer=NULL;
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char *file="/proc/meminfo";
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char content[16]="";
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fp = fopen(file, "rb");
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if (fp == NULL)
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{
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printf("error to open: %s\n", file);
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exit(EXIT_FAILURE);
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}
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while((nread = getline(&buffer, &len, fp)) != -1) {
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if((buf=strstr(buffer, "MemTotal"))!=NULL) /* 简单实现grep的功能 */
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{
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buffer[strlen(buffer)-1]=0; /* 简单实现tr()函数的功能 */
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sscanf(buffer, "%s%s", content, content);
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int memtotal_kb=(int)(strtof(content, NULL));
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printf("内存总容量:\t%dG%4dM %4dK\n",
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memtotal_kb/(1024*1024), /* Gb */
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(memtotal_kb/(1024))%1024, /* Mb */
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(memtotal_kb%(1024*1024))%1024); /* Kb */
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}
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if((buf=strstr(buffer, "MemFree"))!=NULL) /* 简单实现grep的功能 */
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{
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buffer[strlen(buffer)-1]=0; /* 简单实现tr()函数的功能 */
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sscanf(buffer, "%s%s", content, content);
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int memfree_kb=(int)(strtof(content, NULL));
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printf("内存可用容量:\t%dG%4dM %4dK\n",
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memfree_kb/(1024*1024), /* Gb */
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(memfree_kb/(1024))%1024, /* Mb */
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(memfree_kb%(1024*1024))%1024); /* Kb */
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}
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if((buf=strstr(buffer, "SwapTotal"))!=NULL) /* 简单实现grep的功能 */
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{
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buffer[strlen(buffer)-1]=0; /* 简单实现tr()函数的功能 */
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sscanf(buffer, "%s%s", content, content);
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int swaptotal_kb=(int)(strtof(content, NULL));
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printf("SWAP总容量:\t%dG%4dM %4dK\n",
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swaptotal_kb/(1024*1024), /* Gb */
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(swaptotal_kb/(1024))%1024, /* Mb */
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(swaptotal_kb%(1024*1024))%1024); /* Kb */
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}
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if((buf=strstr(buffer, "SwapFree"))!=NULL) /* 简单实现grep的功能 */
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{
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buffer[strlen(buffer)-1]=0; /* 简单实现tr()函数的功能 */
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sscanf(buffer, "%s%s", content, content);
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int swapfree_kb=(int)(strtof(content, NULL));
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printf("SWAP可用容量:\t%dG%4dM %4dK\n",
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swapfree_kb/(1024*1024), /* Gb */
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(swapfree_kb/(1024))%1024, /* Mb */
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(swapfree_kb%(1024*1024))%1024); /* Kb */
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break; /* 所需的信息已满足，退出循环 */
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}
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}
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}
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/*
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* === FUNCTION ======================================================================
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* Name: main
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* Description:
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* =====================================================================================
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*/
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int main ( int argc, char *argv[] )
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{
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printf(">>>系统负载<<<\n");
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sampleLoadAvg();
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printf("----------------------------------------\n");
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printf("\n");
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printf(">>>运行时间<<<\n");
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sampleTime();
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printf("\n");
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printf(">>>版本信息<<<\n");
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sampleOsType();
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sampleOsRelease();
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sampleKernelVersion();
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printf("----------------------------------------\n");
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printf("\n");
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printf(">>>磁盘信息<<<\n");
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sampleDiskStat();
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printf("----------------------------------------\n");
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printf("\n");
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printf(">>>上下文切换<<<\n");
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sampleContext();
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printf("----------------------------------------\n");
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printf("\n");
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printf(">>>线程数目<<<\n");
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sampleProcesses();
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printf("----------------------------------------\n");
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printf("\n");
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printf(">>>内存信息<<<\n");
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sampleMeminfo();
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printf("----------------------------------------\n");
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return EXIT_SUCCESS;
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}
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