wfifo.c
来自「ARM Linux2.4 进程间通信 非常好」· C语言 代码 · 共 50 行
C
50 行
/*********************************************************************
* File: wfifo.c
* Author: Embest J.Zhao 2005.2.17
* Desc: write FIFO,with read program rfifo.c
* History:
*********************************************************************/
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <asm/limits.h>
int main(void)
{
int nFd; /* FIFO */
int nLen; /* FIFO read bytes len */
char szBuf[PIPE_BUF]; /* FIFO buf */
mode_t mode = 666; /* FIFO */
/* creat FIFO */
if ((nFd = mkfifo("/var/ff", mode)) < 0)
{
printf("creat fifo error\n");
exit(-1);
}
/* open FIFO write port */
if ((nFd = open("/var/ff", O_WRONLY)) < 0)
{
printf("open the fifo write error\n");
exit(-1);
}
/* 写fifo */
nLen = sprintf(szBuf, "wfifo send the message");
if (write(nFd, szBuf, nLen + 1) < 0)
{
printf("open the fifo write error\n");
close(nFd);
exit(-1);
}
close(nFd);
return 0;
}
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