使用C语言根据进程名检查进程是否存在，然后重启进程。
/*
* COPYRIGHT NOTICE
* Copyright (C) 2016 HuaHuan Electronics Corporation, Inc. All rights reserved
*
* Author :Kevin_fzs
* File Name:/home/kevin/works/projects/MIPS53003/drivers/webRestart.c
* Create Date :2016/11/16 15:11
* Last Modified:2016/11/16 15:11
* Description :
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int getRestartStatus()
{
char *name="/home/webserver/Rflag.txt";
FILE *fd;
int ret=0;
fd = fopen(name, "r");
if(NULL == fd)
return 1;
else
return 0;
}
int main()
{
FILE *ptr = NULL;
char cmd[128] = "ps -ef | grep appweb | grep -v grep | wc -l";
int status = 0;
char buf[150];
int count;
while(1)
{
status = getRestartStatus(); //根据标志文件来决定是否要检查进程
if(status)
{
if((ptr = popen(cmd, "r"))==NULL)
{
printf("popen err\n");
continue;
}
memset(buf, 0, sizeof(buf));
if((fgets(buf, sizeof(buf),ptr))!= NULL) //获取进程和子进程的总数
{
count = atoi(buf);
if(count <= 0) //当进程数小于等于0时，说明进程不存在
{
system("/home/appweb_start.sh");
printf("restart appweb \n");
}
}
}
usleep(200000);
}
}