1/* Copyright (C) 2006-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2006.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <sys/select.h>
20#include <sysdep-cancel.h>
21#include <time64-support.h>
22
23int
24__pselect64 (int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
25 const struct __timespec64 *timeout, const sigset_t *sigmask)
26{
27 /* The Linux kernel can in some situations update the timeout value.
28 We do not want that so use a local variable. */
29 struct __timespec64 tval;
30 if (timeout != NULL)
31 {
32 tval = *timeout;
33 timeout = &tval;
34 }
35
36 /* Note: the system call expects 7 values but on most architectures
37 we can only pass in 6 directly. If there is an architecture with
38 support for more parameters a new version of this file needs to
39 be created. */
40
41#ifndef __NR_pselect6_time64
42# define __NR_pselect6_time64 __NR_pselect6
43#endif
44 int r;
45 if (supports_time64 ())
46 {
47 /* NB: This is required by ARGIFY used in x32 internal_syscallN. */
48 __syscall_ulong_t data[2] =
49 {
50 (uintptr_t) sigmask, __NSIG_BYTES
51 };
52 r = SYSCALL_CANCEL (pselect6_time64, nfds, readfds, writefds, exceptfds,
53 timeout, data);
54 if (r == 0 || errno != ENOSYS)
55 return r;
56
57 mark_time64_unsupported ();
58 }
59
60#ifndef __ASSUME_TIME64_SYSCALLS
61 r = __pselect32 (nfds, readfds, writefds, exceptfds, timeout, sigmask);
62#endif
63 return r;
64}
65
66#if __TIMESIZE != 64
67libc_hidden_def (__pselect64)
68
69int
70__pselect (int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
71 const struct timespec *timeout, const sigset_t *sigmask)
72{
73 struct __timespec64 ts64, *pts64 = NULL;
74 if (timeout != NULL)
75 {
76 ts64 = valid_timespec_to_timespec64 (*timeout);
77 pts64 = &ts64;
78 }
79 return __pselect64 (nfds, readfds, writefds, exceptfds, pts64, sigmask);
80}
81#endif
82
83#ifndef __pselect
84weak_alias (__pselect, pselect)
85#endif
86