Keep a process running, and recover it after terminated. 我们不用很麻烦也能让一个进程持续跑起来.

keeprun.c

#include <stdio.h>
#include <unistd.h>
#include <sys/wait.h>
 
int main(int argc, char* argv[])
{
    if (argc == 1) {
        fprintf(stderr, "Usage:\n");
        fprintf(stderr, "keeprun prog arg0 arg1 ...");
        return 1;
    }
    while (1) {
        int status = 0;
        pid_t pid = fork(); 
        if (pid == -1) {
            fprintf(stderr, "Fail to fork error");
            return 1;
        }
        if (pid == 0) {
            return execv(argv[1], argv + 1);
        }
        waitpid(pid, &status, 0);
        printf("Subprocess terminated, restart in 1 second");
        sleep(1);
    }
}

/* Examples:
 *     keeprun `which python` some-script.py arg0 arg1
 */