1/* clock_adjtime -- tune kernel clock.
2 Copyright (C) 2020 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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 License as
7 published by the Free Software Foundation; either version 2.1 of the
8 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; see the file COPYING.LIB. If
17 not, see <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <stdlib.h>
21#include <time.h>
22#include <sysdep.h>
23#include <sys/timex.h>
24#include <kernel-features.h>
25
26int
27__clock_adjtime64 (const clockid_t clock_id, struct __timex64 *tx64)
28{
29#ifdef __ASSUME_TIME64_SYSCALLS
30# ifndef __NR_clock_adjtime64
31# define __NR_clock_adjtime64 __NR_clock_adjtime
32# endif
33 return INLINE_SYSCALL_CALL (clock_adjtime64, clock_id, tx64);
34#else
35 int ret = INLINE_SYSCALL_CALL (clock_adjtime64, clock_id, tx64);
36 if (errno != ENOSYS)
37 return ret;
38
39 if (tx64->modes & ADJ_SETOFFSET
40 && ! in_time_t_range (tx64->time.tv_sec))
41 {
42 __set_errno (EOVERFLOW);
43 return -1;
44 }
45
46 struct timex tx32 = valid_timex64_to_timex (*tx64);
47 int retval = INLINE_SYSCALL_CALL (clock_adjtime, clock_id, &tx32);
48 if (retval >= 0)
49 *tx64 = valid_timex_to_timex64 (tx32);
50
51 return retval;
52#endif
53}
54
55#if __TIMESIZE != 64
56libc_hidden_def (__clock_adjtime64)
57
58int
59__clock_adjtime (const clockid_t clock_id, struct timex *tx)
60{
61 struct __timex64 tx64;
62 int retval;
63
64 tx64 = valid_timex_to_timex64 (*tx);
65 retval = __clock_adjtime64 (clock_id, &tx64);
66 if (retval >= 0)
67 *tx = valid_timex64_to_timex (tx64);
68
69 return retval;
70}
71#endif
72libc_hidden_def (__clock_adjtime);
73strong_alias (__clock_adjtime, clock_adjtime)
74