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//start from the very beginning,and to create greatness
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//@author: Chuangwei Lin
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//@E-mail:979951191@qq.com
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//@brief: 一个进程间管道通信的例子
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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int main(int argc, char const *argv[])
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{
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int result = -1;//创建管道结果
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int fd[2],nbytes;//文件描述符和字符个数
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pid_t pid;//进程pid值
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char string[] = "进程间管道通信";
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char readbuffer[80];//字符缓冲区
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//文件符1用于写,0用于读
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int* write_fd = &fd[1];
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int* read_fd = &fd[0];
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result = pipe(fd);//建立管道
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if(-1 == result)
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{
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printf("管道建立失败\n");
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return -1;
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}
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pid = fork();//分叉进程
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if (-1 == pid)
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{
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printf("fork进程失败\n");
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return -1;
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}
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if (0 == pid)//子进程
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{
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close(*read_fd);//关闭读端
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result = write(*write_fd,string,strlen(string));//向管道段写入字符
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return 0;
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}
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else//父进程
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{
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close(*write_fd);//关闭写端
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nbytes = read(*read_fd,readbuffer, sizeof(readbuffer));//从管道读数据
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printf("接收到%d个数据,内容为:%s\n",nbytes,readbuffer);
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}
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return 0;
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}
运行结果为:
[root@localhost lcw20150805]# ./lcw_pipe
接收到21个数据,内容为:进程间管道通信
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