守护进程c++，shell

# cat shouhu.sh 
#!/bin/sh
while true; do
	server=`ps aux | grep face-recognition-services-0.0.3 | grep -v grep`
	if [ ! "$server" ]; then
		sh start.sh
		sleep 10
	fi
	 sleep 5
done

# nohup   sh  shouhu.sh   >/dev/null   2>&1  &
 

C++基础之守护进程

C++基础之守护进程_c++守护进程_qccz123456的博客-优快云博客

#include <unistd.h>
#include <signal.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <time.h>
#include <cstdlib>

void init_daemon(void)
{
    int pid;
    int i;
    if(pid=fork())
       exit(0);
    else if(pid< 0)
       exit(1);

    setsid();

    if(pid=fork())
       exit(0);
    else if(pid< 0)
       exit(1);


    for(i=0;i< NOFILE;++i)
        close(i);
    chdir("/tmp");
    umask(0);
    return;
}

main()
{
    FILE *fp;
    time_t t;
    init_daemon();
    while(1)
    {
        if((fp=fopen("test.log", "a")) >=0)
        {
            t=time(0);
            fprintf(fp,"I'm here at %sn",asctime(localtime(&t)) );
            fclose(fp);
        }
        sleep(1);
    }
}

shell脚本（管理守护进程） (bbsmax.com)