Linux uses the exec function to implement code sharing for process replacement

This article mainly introduces the relevant information of Linux process replacement (execfunction) implementation code. Friends in need can refer to

Linux Process replacement (exec function) implementation code

  # 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;                                              }

The picture below is the result picture of execl execlp execv execvp

The picture below is execle Result graph of execve

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