Hurd: accept4

1 files changed, 100 insertions, 0 deletions

diff --git a/sysdeps/mach/hurd/accept4.c b/sysdeps/mach/hurd/accept4.c
new file mode 100644
index 0000000000..a86e1771d6
--- /dev/null
+++ b/sysdeps/mach/hurd/accept4.c
@@ -0,0 +1,100 @@
+/* Copyright (C) 1992-2012 Free Software Foundation, Inc.
+
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <fcntl-internal.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <hurd.h>
+#include <hurd/fd.h>
+#include <hurd/socket.h>
+
+/* Await a connection on socket FD.
+   When a connection arrives, open a new socket to communicate with it,
+   set *ADDRARG (which is *ADDR_LEN bytes long) to the address of the connecting
+   peer and *ADDR_LEN to the address's actual length, and return the
+   new socket's descriptor, or -1 for errors.  The operation can be influenced
+   by the FLAGS parameter.  */
+int
+__libc_accept4 (int fd, __SOCKADDR_ARG addrarg, socklen_t *addr_len, int flags)
+{
+  error_t err;
+  socket_t new;
+  addr_port_t aport;
+  struct sockaddr *addr = addrarg.__sockaddr__;
+  char *buf = (char *) addr;
+  mach_msg_type_number_t buflen;
+  int type;
+
+  flags = sock_to_o_flags (flags);
+
+  if (flags & ~(O_CLOEXEC | O_NONBLOCK))
+    return __hurd_fail (EINVAL);
+
+  if (err = HURD_DPORT_USE (fd, __socket_accept (port, &new, &aport)))
+    return __hurd_dfail (fd, err);
+
+  if (addr != NULL)
+    {
+      buflen = *addr_len;
+      err = __socket_whatis_address (aport, &type, &buf, &buflen);
+      if (err == EOPNOTSUPP)
+	/* If the protocol server can't tell us the address, just return a
+	   zero-length one.  */
+	{
+	  buf = (char *)addr;
+	  buflen = 0;
+	  err = 0;
+	}
+    }
+  __mach_port_deallocate (__mach_task_self (), aport);
+
+  if (! err)
+    {
+      if (flags & O_NONBLOCK)
+	err = __io_set_some_openmodes (new, O_NONBLOCK);
+      /* TODO: do we need special ERR massaging after the previous call?  */
+    }
+
+  if (err)
+    {
+      __mach_port_deallocate (__mach_task_self (), new);
+      return __hurd_dfail (fd, err);
+    }
+
+  if (addr != NULL)
+    {
+      if (*addr_len > buflen)
+	*addr_len = buflen;
+
+      if (buf != (char *) addr)
+	{
+	  memcpy (addr, buf, *addr_len);
+	  __vm_deallocate (__mach_task_self (), (vm_address_t) buf, buflen);
+	}
+
+      if (buflen > 0)
+	addr->sa_family = type;
+    }
+
+  return _hurd_intern_fd (new, O_IGNORE_CTTY | flags, 1);
+}
+libc_hidden_def (__libc_accept4)
+weak_alias (__libc_accept4, accept4)