fork执行一个进程

https://coolr321.github.io/2018/10/30/%E4%B8%80%E4%B8%AAfork-%E8%B0%83%E7%94%A8%E7%9A%84%E4%BE%8B%E5%AD%90/

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// Linux 程序b #include <stdio.h> #include <sys/types.h> #include <unistd.h> #include <stdlib.h> int main(int argc, char *argv[], char **environ) {     int pid;     pid = fork();     if(pid < 0) {         printf("Fork failed.\n");         exit(1);     } else if(pid == 0) {         printf("Call another program a.out.\n");         execve("a.out", argv, environ);     }     exit(0);     return 0; }