This C code creates a named pipe called "FIFO_PIPE" between a sender and receiver process. The sender process opens the pipe for writing, copies a test string into a buffer, writes it to the pipe, and closes the pipe. Any errors in creating, opening, writing to, or closing the pipe cause the sender process to exit with an error message.

1. #include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
//SENDER PROCESS
//
//first start sender
//function open waits until receiver process has been started
#define MAX 100
void main ()
{
int fd;
char buf[MAX];
printf("Creating Pipe... Waiting for receiver process...nn");
//TRY TO CRATE A NAMED PIPE
if (mkfifo("FIFO_PIPE",0666)<0)
{
perror("FIFO (named pipe) could not be created.");
exit(-1);
}
else printf("nPipe has been created...");
//OPEN PIPE
if ((fd = open ("FIFO_PIPE", O_WRONLY))<0)
{
perror("Could not open named pipe.");
exit(-1);
}
else printf("Pipe has been opened.");
//WRITE TO PIPE
strcpy(buf,"Named Pipe experiment.");
if( write (fd,buf, strlen(buf)+1) < 0 )
{
perror("Error writing to named Pipe (FIFO)");
exit(-1);
}
else printf("Message has been written to pipe.");
//CLOSE FIFO
if (close(fd)<0)
{
perror("Error closing FIFO");
exit(-1);
}
exit(0);
}