创建一个守护进程,进程的内容为往一个文件里写入一句话,每隔一秒钟写入一句话
查看进程ps -x
结束进程kill ??
#include<fcntl.h>
#include<sys/types.h>
#include<sys/wait.h>
#include<unistd.h>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define MAXFILE 65535
int main()
{
pid_t pid;
FILE *fp;
char *ch="this is a test \n";
int i=0,len;
len=strlen(ch);
pid=fork();
if(pid<0) printf("fork faile \n");
else if(pid>0)
exit(0);
setsid();
chdir("/");
umask(0);
for(i=0;i<MAXFILE;i++)
close(i);
while(1){
if((fp=fopen("/tmp/dameon.log","ab"))<0){
perror("open");
exit(1);
}
} 1,1 顶端
}