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!

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