管道无法通过pthread_t工作(pipe not working through pthread_t)

 我现在正试图通过两个线程（主线程和第二个线程）之间的管道发送一些数据，但我得到关于文件描述符的错误9。 我认为在涉及线程时文件描述符是重复的，但似乎并非如此。 它通常会返回“从bf hi读取”，但它不会。 你能帮我解决这个问题吗？ 谢谢。 这是代码 
 
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <pthread.h>

pthread_mutex_t mutex;
int tube[2];

void * fonction(){
    if(close(tube[0])==-1){
        perror("close error \n");
        exit(EXIT_FAILURE);
    }
    printf("son \n");
    if(write(tube[1],"hi",2)<0){
        perror("write error \n");
        exit(EXIT_FAILURE);
    }
    printf("errno %d \n",errno);
    pthread_exit(NULL);
}

int main(){
    pthread_t a;
    if(pipe(tube)==-1){
        perror("pipe error \n");
        exit(EXIT_FAILURE);
    }
    char buffer[2];
    pthread_mutex_init(&mutex,NULL);
    close(tube[1]);
    pthread_create(&a,NULL,fonction,&tube[1]);
    pthread_join(a,NULL);
    read(tube[0],buffer,2);
    printf("read from bf %s \n",buffer);
    return EXIT_SUCCESS;
}
 
 Ps：正如timrau在这里建议的那样（Pthread_t 没有启动 ）我使用pthread_join，但我想这不是正确的方法 

I'm now trying to send some data through a pipe between two thread (the main thread and a second one) but I get the errno 9 about the file descriptor. I thought file descriptor were duplicated when thread are involved but it seems it's not the case here. It would normally return "read from bf hi" but it won't. Can you help me to resolve this issue ? Thanks. Here is the code 
 
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <pthread.h>

pthread_mutex_t mutex;
int tube[2];

void * fonction(){
    if(close(tube[0])==-1){
        perror("close error \n");
        exit(EXIT_FAILURE);
    }
    printf("son \n");
    if(write(tube[1],"hi",2)<0){
        perror("write error \n");
        exit(EXIT_FAILURE);
    }
    printf("errno %d \n",errno);
    pthread_exit(NULL);
}

int main(){
    pthread_t a;
    if(pipe(tube)==-1){
        perror("pipe error \n");
        exit(EXIT_FAILURE);
    }
    char buffer[2];
    pthread_mutex_init(&mutex,NULL);
    close(tube[1]);
    pthread_create(&a,NULL,fonction,&tube[1]);
    pthread_join(a,NULL);
    read(tube[0],buffer,2);
    printf("read from bf %s \n",buffer);
    return EXIT_SUCCESS;
}
 
Ps : as timrau suggested here (Pthread_t not starting) I use pthread_join but I guess it's not the right way to do it

原文：https://stackoverflow.com/questions/37170117