我正在尝试使用命名管道(fifo)编写程序哪个部分是通信。当我在bash脚本中以无限循环(后台编写器)运行编写器和读取器程序时,某些时候编写器程序没有通过我收到错误结果而正确关闭。
我尝试在程序中使用一个简单的代码:
writer.c
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
int main()
{
int fd;
char * myfifo = "/tmp/myfifo";
/* create the FIFO (named pipe) */
mkfifo(myfifo, 0666);
/* write "Hi" to the FIFO */
fd = open(myfifo, O_WRONLY);
write(fd, "Hi", sizeof("Hi"));
close(fd);
/* remove the FIFO */
unlink(myfifo);
return 0;
}
reader.c
#include <fcntl.h>
#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>
#define MAX_BUF 1024
int main()
{
int fd;
char * myfifo = "/tmp/myfifo";
char buf[MAX_BUF];
/* open, read, and display the message from the FIFO */
fd = open(myfifo, O_RDONLY);
read(fd, buf, MAX_BUF);
printf("Received: %s\n", buf);
close(fd);
return 0;
}
run.sh
#!/bin/bash
while true; do
./writer &
./reader
done
你能帮我正确地做这件事还是让你知道怎么做?
此致