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glibc  2.9
Functions
socketpair.c File Reference
#include <errno.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <unistd.h>
#include <hurd.h>
#include <hurd/fd.h>
#include <hurd/socket.h>

Go to the source code of this file.

Functions

int __socketpair (int domain, int type, int protocol, int fds[2])

Function Documentation

int __socketpair ( int  domain,
int  type,
int  protocol,
int  fds[2] 
)

Definition at line 33 of file socketpair.c.

{
  error_t err;
  socket_t server, sock1, sock2;
  int d1, d2;

  if (fds == NULL)
    return __hurd_fail (EINVAL);

  /* Find the domain's socket server.  */
  server = _hurd_socket_server (domain, 0);
  if (server == MACH_PORT_NULL)
    return -1;

  /* Create two sockets and connect them together.  */

  err = __socket_create (server, type, protocol, &sock1);
  if (err == MACH_SEND_INVALID_DEST || err == MIG_SERVER_DIED
      || err == MIG_BAD_ID || err == EOPNOTSUPP)
    {
      /* On the first use of the socket server during the operation,
        allow for the old server port dying.  */
      server = _hurd_socket_server (domain, 1);
      if (server == MACH_PORT_NULL)
       return -1;
      err = __socket_create (server, type, protocol, &sock1);
    }
  if (err)
    return __hurd_fail (err);
  if (err = __socket_create (server, type, protocol, &sock2))
    {
      __mach_port_deallocate (__mach_task_self (), sock1);
      return __hurd_fail (err);
    }
  if (err = __socket_connect2 (sock1, sock2))
    {
      __mach_port_deallocate (__mach_task_self (), sock1);
      __mach_port_deallocate (__mach_task_self (), sock2);
      return __hurd_fail (err);
    }

  /* Put the sockets into file descriptors.  */

  d1 = _hurd_intern_fd (sock1, O_IGNORE_CTTY, 1);
  if (d1 < 0)
    {
      __mach_port_deallocate (__mach_task_self (), sock2);
      return -1;
    }
  d2 = _hurd_intern_fd (sock2, O_IGNORE_CTTY, 1);
  if (d2 < 0)
    {
      err = errno;
      (void) close (d1);
      return __hurd_fail (err);
    }

  fds[0] = d1;
  fds[1] = d2;
  return 0;
}

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