1 | /* Copyright (C) 2006-2020 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 | |
26 | |
27 | int |
28 | __ppoll64 (struct pollfd *fds, nfds_t nfds, const struct __timespec64 *timeout, |
29 | const sigset_t *sigmask) |
30 | { |
31 | /* The Linux kernel can in some situations update the timeout value. |
32 | We do not want that so use a local variable. */ |
33 | struct __timespec64 tval; |
34 | if (timeout != NULL) |
35 | { |
36 | tval = *timeout; |
37 | timeout = &tval; |
38 | } |
39 | |
40 | #ifdef __ASSUME_TIME64_SYSCALLS |
41 | # ifndef __NR_ppoll_time64 |
42 | # define __NR_ppoll_time64 __NR_ppoll |
43 | # endif |
44 | return SYSCALL_CANCEL (ppoll_time64, fds, nfds, timeout, sigmask, _NSIG / 8); |
45 | #else |
46 | # ifdef __NR_ppoll_time64 |
47 | int ret = SYSCALL_CANCEL (ppoll_time64, fds, nfds, timeout, sigmask, |
48 | _NSIG / 8); |
49 | if (ret >= 0 || errno != ENOSYS) |
50 | return ret; |
51 | # endif |
52 | struct timespec ts32; |
53 | if (timeout) |
54 | { |
55 | if (! in_time_t_range (timeout->tv_sec)) |
56 | { |
57 | __set_errno (EOVERFLOW); |
58 | return -1; |
59 | } |
60 | |
61 | ts32 = valid_timespec64_to_timespec (*timeout); |
62 | } |
63 | |
64 | return SYSCALL_CANCEL (ppoll, fds, nfds, timeout ? &ts32 : NULL, sigmask, |
65 | _NSIG / 8); |
66 | #endif |
67 | } |
68 | |
69 | #if __TIMESIZE != 64 |
70 | int |
71 | __ppoll (struct pollfd *fds, nfds_t nfds, const struct timespec *timeout, |
72 | const sigset_t *sigmask) |
73 | { |
74 | struct __timespec64 ts64; |
75 | if (timeout) |
76 | ts64 = valid_timespec_to_timespec64 (*timeout); |
77 | |
78 | return __ppoll64 (fds, nfds, timeout ? &ts64 : NULL, sigmask); |
79 | } |
80 | #endif |
81 | strong_alias (__ppoll, ppoll) |
82 | libc_hidden_def (ppoll) |
83 | |