1/* Copyright (C) 2006-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <errno.h>
19#include <signal.h>
20#include <time.h>
21#include <sys/poll.h>
22#include <sysdep-cancel.h>
23
24int
25__ppoll64 (struct pollfd *fds, nfds_t nfds, const struct __timespec64 *timeout,
26 const sigset_t *sigmask)
27{
28 /* The Linux kernel can in some situations update the timeout value.
29 We do not want that so use a local variable. */
30 struct __timespec64 tval;
31 if (timeout != NULL)
32 {
33 tval = *timeout;
34 timeout = &tval;
35 }
36
37#ifndef __NR_ppoll_time64
38# define __NR_ppoll_time64 __NR_ppoll
39#endif
40
41#ifdef __ASSUME_TIME64_SYSCALLS
42 return SYSCALL_CANCEL (ppoll_time64, fds, nfds, timeout, sigmask,
43 __NSIG_BYTES);
44#else
45 int ret;
46 bool need_time64 = timeout != NULL && !in_int32_t_range (timeout->tv_sec);
47 if (need_time64)
48 {
49 ret = SYSCALL_CANCEL (ppoll_time64, fds, nfds, timeout, sigmask,
50 __NSIG_BYTES);
51 if (ret == 0 || errno != ENOSYS)
52 return ret;
53 __set_errno (EOVERFLOW);
54 return -1;
55 }
56
57 struct timespec ts32;
58 if (timeout != NULL)
59 ts32 = valid_timespec64_to_timespec (*timeout);
60
61 return SYSCALL_CANCEL (ppoll, fds, nfds, timeout ? &ts32 : NULL, sigmask,
62 __NSIG_BYTES);
63#endif
64}
65
66#if __TIMESIZE != 64
67libc_hidden_def (__ppoll64)
68
69int
70ppoll (struct pollfd *fds, nfds_t nfds, const struct timespec *timeout,
71 const sigset_t *sigmask)
72{
73 struct __timespec64 ts64;
74 if (timeout)
75 ts64 = valid_timespec_to_timespec64 (*timeout);
76
77 return __ppoll64 (fds, nfds, timeout ? &ts64 : NULL, sigmask);
78}
79#endif
80libc_hidden_def (ppoll)
81