Comments on: this program on pipes is not wroking , can anyone tell me why ??

By: amit.verma

amit.verma — Fri, 09 Mar 2012 12:41:09 +0000

my program is working now ,
it was a minor mistake

By: Vaibhav Singh

Vaibhav Singh — Tue, 28 Feb 2012 17:00:41 +0000

you hav made so couple of small mistakes here is your right program after modification … checkout the changes and wts going wrong in your program .

int main()
{
char buff[10];
char tx[]=”hello wor\n”;
int fd[2],t;
pid_t pd;
printf(“\n %s”,tx);
memset(buff,”,sizeof(buff));
pipe(fd);
pd = fork();
if (pd > 0 )
{
printf(” parent cerated : %d\n”,getpid());
//close(fd[0]);
write (fd[1],tx,sizeof(tx));
}
else if(pd == 0)
{
printf(“\n child cerated : %d”,getpid());
//close(fd[1]);

printf(“\n %s”,buff);
read(fd[0],buff,sizeof(buff));
printf(“the received string is :%s”,buff);
}
return 0;

}

By: pushpa

pushpa — Sun, 26 Feb 2012 17:33:29 +0000

well i just had a glance to ur pgm.it looks ok for me.plz mention wht kind of error u r getting.is it related with read write operation of some other prblm.
i wld suggest u to check whether system calls are correctly called with some error check condition.check whether u can print some statements inside child & parent or nt.even read & write functions returns the size of character read or written.check those values too.