server.c

此源码是著名的教材BeginningLinux Programming中文名字叫Linux程序设计书中的源代码

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

#define FIFO_READ	"readfifo"
#define FIFO_WRITE	"writefifo"
#define BUF_SIZE	1024

int main(void)
{
    int		wfd, rfd;
    char	buf[BUF_SIZE];
    int		len;
   
    umask(0);
    if (mkfifo (FIFO_WRITE, S_IFIFO|0666)) {
	printf ("Can't create FIFO %s because  %s", FIFO_WRITE, strerror(errno));
        exit (1);
    }
    umask(0);
    wfd = open(FIFO_WRITE, O_WRONLY);
    if (wfd == -1) {
	printf("open FIFO %s error: %s", FIFO_WRITE, strerror(errno));
        exit(1);
     }

    while ((rfd = open(FIFO_READ, O_RDONLY)) == -1) {
		sleep(1);
    }

    while (1) 
   {
	printf ("Server: ");
	fgets (buf, BUF_SIZE, stdin);
	buf[strlen(buf)-1] = '\0';
	if (strncmp (buf,"quit", 4) == 0) {
		close (wfd);
		unlink (FIFO_WRITE);
		close (rfd);
		exit (0);
	}
	write (wfd, buf, strlen(buf));

	len = read (rfd, buf, BUF_SIZE);
	if ( len > 0) {
		buf[len] = '\0';
		printf ("Client: %s\n", buf);
        }
   }
}