fifo2.c

linux下进程间通信方式之一的fifo读写源程序。

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

#define FIFO_SERVER "/tmp/fifo"

int main(int argc, char ** argv)
{
	printf("haha\n");
	char value[256];
	int fd,ret_size;

	fd=open(FIFO_SERVER,O_RDONLY,0);
	if(fd==-1)
	{
      	printf("open %s for read error\n");
            return 1;    
	}
	
	ret_size=read(fd,value,sizeof(value));
	if(ret_size==-1)
      	if(errno==EAGAIN)
            	printf("no data avlaible\n");
      printf("real read bytes %d\n",ret_size);
	printf("value:%s\n",value);
	return 0;



}