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 <errno.h>
20#include <signal.h>
21#include <time.h>
22#include <sys/poll.h>
23#include <sysdep-cancel.h>
24#include <kernel-features.h>
25#include <time64-support.h>
26
27
28int
29__ppoll64 (struct pollfd *fds, nfds_t nfds, const struct __timespec64 *timeout,
30 const sigset_t *sigmask)
31{
32 /* The Linux kernel can in some situations update the timeout value.
33 We do not want that so use a local variable. */
34 struct __timespec64 tval;
35 if (timeout != NULL)
36 {
37 tval = *timeout;
38 timeout = &tval;
39 }
40
41 int ret;
42
43 if (supports_time64 ())
44 {
45#ifndef __NR_ppoll_time64
46# define __NR_ppoll_time64 __NR_ppoll
47#endif
48 ret = SYSCALL_CANCEL (ppoll_time64, fds, nfds, timeout, sigmask,
49 __NSIG_BYTES);
50
51 if (ret == 0 || errno != ENOSYS)
52 return ret;
53
54 mark_time64_unsupported ();
55 }
56
57#ifndef __ASSUME_TIME64_SYSCALLS
58 struct timespec ts32;
59 if (timeout)
60 {
61 if (! in_time_t_range (timeout->tv_sec))
62 {
63 __set_errno (EOVERFLOW);
64 return -1;
65 }
66
67 ts32 = valid_timespec64_to_timespec (*timeout);
68 }
69
70 ret = SYSCALL_CANCEL (ppoll, fds, nfds, timeout ? &ts32 : NULL, sigmask,
71 __NSIG_BYTES);
72#endif
73
74 return ret;
75}
76
77#if __TIMESIZE != 64
78libc_hidden_def (__ppoll64)
79
80int
81__ppoll (struct pollfd *fds, nfds_t nfds, const struct timespec *timeout,
82 const sigset_t *sigmask)
83{
84 struct __timespec64 ts64;
85 if (timeout)
86 ts64 = valid_timespec_to_timespec64 (*timeout);
87
88 return __ppoll64 (fds, nfds, timeout ? &ts64 : NULL, sigmask);
89}
90#endif
91strong_alias (__ppoll, ppoll)
92libc_hidden_def (ppoll)
93