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/* Copyright (C) 1992-2025 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; see the file COPYING.LIB. If
not, see <https://www.gnu.org/licenses/>. */
#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>
#include <sysdep-cancel.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;
int cancel_oldtype;
flags = sock_to_o_flags (flags);
if (flags & ~(O_CLOEXEC | O_NONBLOCK))
return __hurd_fail (EINVAL);
cancel_oldtype = LIBC_CANCEL_ASYNC();
err = HURD_DPORT_USE_CANCEL (fd, __socket_accept (port, &new, &aport));
LIBC_CANCEL_RESET (cancel_oldtype);
if (err)
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);
}
weak_alias (__libc_accept4, accept4)
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