/*************************************************************************
	> File Name : ipc_pip_named_writ.c
	> Author : TL Song
	> EMail : songtianlun@frytea.com
	> Created Time : Mon 28 Dec 2020 03:49:50 PM CST
 ************************************************************************/

//writing
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>

#define N 80

int main() {
    int out_file;
    int nbyte;
    char buf[N];
    if((mkfifo("myfifo",0666))<0)    //创建有名管道
    {
        if(errno==EEXIST)
        {
            printf("The fifo is exist.\n");
        }
        else{
            perror("creat myfifo failed!\n");
            exit(-1);
        }
    }else{
        printf("created by this process.\n");
    }
    out_file = open("myfifo",O_WRONLY);
    if (out_file < 0) {
        printf("Error opening fifo.");
        exit(1);
    }
    printf("please input something:\n");
    while((nbyte = read(0,buf,N))){
        write(out_file,buf,nbyte);
        printf("please input something:\n");
    }
    close(out_file);
    return 0;
}