pipe.c

来自「word count information using message que」· C语言 代码 · 共 63 行

//ONE CONSUMER  ONE PRODUCER 

#include<stdio.h>
#include<unistd.h>
#include<stdlib.h>
#include<string.h>
int main()
{
char msgs[200],msgr[200];
// printf("sayooj \n");
// fgets(msg,sizeof(msg),stdin);
// printf(" the message is : %s",msg);
 int ch=1;

int p[2],pid;
if(pipe(p)==-1)
	{
	printf("some error in creating pipe ");
	}
else
	{
	printf("pipe has been creted successfully \n");
	}

pid=fork();

while(ch<7)
{
if(pid==0)
	{		//child consumer
	close(p[1]);
	if(read(p[0],msgr,sizeof(msgr))==-1)
		{
		printf("error in reading \n");
		}
	else
		{
		printf("message received by child : %s",msgr);
		fflush(stdout);
		sleep(5);		//to make child slower 
		ch++;
		}
	}
else
	{		//parent producer
	close(p[0]);
	printf("enter the message \n");
	fgets(msgs,sizeof(msgs),stdin);
	if(write(p[1],msgs,sizeof(msgs))==-1)
		{
		printf("error in writing \n");
		}
	else
		{
		printf("message sent by parent is : %s",msgs);
		fflush(stdout);
		}
	
	}
// scanf("enter %d",&ch);
}
return 0 ;
}