linux进程间通信之有名管道

生产者进程

/*************************************************************************
> File Name: named_pipe_w.c
> Author: XXDK
> Email: [e-mail] 
> Created Time: Thu 16 Mar 2017 10:51:22 PM PDT
 ************************************************************************/

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

int main()
{
int ret;
int fd;

if((ret = mkfifo("./fifo", 0666)) != 0) {
if(errno == EEXIST) {
puts("fifo exist\n");
}else {
perror("make fifo error");
}
}

// 阻塞在此处等待另一端的写打开
fd = open("./fifo", O_WRONLY);

write(fd, "xxdk", 4);
printf("write data ok\n");

exit(0);

}

消费者进程

/*************************************************************************
> File Name: named_pipe_r.c
> Author: XXDK
> Email: [e-mail] 
> Created Time: Thu 16 Mar 2017 10:51:22 PM PDT
 ************************************************************************/

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

int main()
{
int ret;
int fd;
char buf[10] = {0};

if((ret = mkfifo("./fifo", 0666)) != 0) {
if(errno == EEXIST) {
puts("fifo exist\n");
}else {
perror("make fifo error");
}
}
fd = open("./fifo", O_RDONLY);

read(fd, buf, 4);
printf("read data ok: %s\n", buf);

exit(0);

}