Linux使用exec函数实现进程替换的代码分享-木庄网络博客

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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;                                              }