11.23

#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define FIFO_SERVER "/tmp/myfifo"


main(int argc,char** argv)
{
int fd;
char w_buf[100];
int nwrite;

/*打开管道*/
fd=open(FIFO_SERVER,O_WRONLY|O_NONBLOCK,0);

if(argc==1)
{
printf("Please send something\n");
exit(-1);
}

strcpy(w_buf,argv[1]);

/* 向管道写入数据 */
if((nwrite=write(fd,w_buf,100))==-1)
{
if(errno==EAGAIN)
printf("The FIFO has not been read yet.Please try later\n");
}
else 
printf("write %s to the FIFO\n",w_buf);
}