pipes und threads: Bad file descriptor

[Pipeline]

Hallo!

Bei dem folgenden simplen Programm...

#include<pthread.h>
#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>

void *t1(void *p)
{
  char *b = "1234567890";
  if(write(*(int*)p, b, 11) == -1)
    perror("write");
}

void *t2(void *p)
{
  char *b = new char[11];
  if(read(*(int*)p, b, 11) == -1)
    perror("read");
  printf(b);
  delete[] b;
}

int main()
{
  int fd[2];
  if(pipe(fd) == -1)
    {
      perror("pipe");
      exit(1);
    }

  pthread_t thread[2];
  pthread_create(&thread[0], NULL, t1, (void*)&fd[0]);
  pthread_create(&thread[1], NULL, t2, (void*)&fd[1]);

  pthread_join(thread[0], NULL);
  pthread_join(thread[1], NULL); 

  return 0;
}

...bekomme ich diese Fehler:

write: Bad file descriptor
read: Bad file descriptor

Warum? Kann man pipes etwa nicht in threads verwenden?

[Mario Sandler]

pipe() creates a pair of file descriptors, pointing to a pipe inode, and places them in the array pointed to by filedes. filedes[0] is for reading, filedes[1] is for writing.

http://linux.die.net/man/2/pipe

Merkst du was?

[Pipeline]

Ooops. Danke.