用socketpair()进行进程间的全双工通讯

/**************************************************  description: use socketpair() to implete IPC(全双工的IPC)*  author: chengshuguang**************************************************/#include <stdio.h>#include <sys/socket.h>#include <unistd.h>#define child "wo shi child fa lai de"#define parent "wo shi parent fa lai de"int main(){int fd[2];int ret;ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);pid_t pid;pid = fork();printf("here\n");if(pid == 0){char buf[20];close(fd[0]);read(fd[1],buf,20);printf("child: %s\n",buf);write(fd[1],child,sizeof(child));close(fd[1]);}else{char buf[20];close(fd[1]);write(fd[0],parent,sizeof(child));read(fd[0],buf,20);printf("parent: %s\n",buf);close(fd[0]);}sleep(10);return 0;}