Linux 进程替换(exec函数）实现代码

Linux 进程替换(exec函数）实现代码

  # include<stdio.h>
  #include<stdlib.h>
  #include<unistd.h>
  #include<fcntl.h>
  #include<sys/types.h>
  #include<sys/stat.h>
  #include<string.h>
  int main()
   {
    pid_t id=fork();
  if(id==0)
   {
   printf("child is running\n");
   sleep(1);
  char* env[]={"MYENV=/A/B/C/D/AAAA",NULL};
  char* argv[]={"ls","-l","-n","-i",NULL};
 // execl("/bin/ls","ls","-l","-n","-i",NULL);
  // execlp("ls","ls","-l","-n","-i",NULL);
 //  execv("/bin/ls",argv);
  // execvp("ls",argv);


   // execle("./myenv","myenv",NULL,env);
      execve("./myenv",argv,env);
      printf("child id done\n");  //exec成功的话不执行此语句
      exit(1);
    }
    else
    {
       pid_t ret=waitpid(id, NULL,0);
      if(ret>0)
       {
        printf("father wait success\n"); }
         else{
          printf("child quit not normal\n");

       }   }   return 0;                                              }

下图就是execl execlp execv execvp的结果图

下图是execle execve的结果图

感谢阅读，希望能帮助到大家，谢谢大家对对本知道支持！