1/* Copyright (C) 1995-2020 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 <limits.h>
20#include <sys/time.h>
21#include <sys/timex.h>
22
23#define MAX_SEC (INT_MAX / 1000000L - 2)
24#define MIN_SEC (INT_MIN / 1000000L + 2)
25
26int
27__adjtime64 (const struct __timeval64 *itv, struct __timeval64 *otv)
28{
29 struct __timex64 tntx;
30
31 if (itv)
32 {
33 struct __timeval64 tmp;
34
35 /* We will do some check here. */
36 tmp.tv_sec = itv->tv_sec + itv->tv_usec / 1000000L;
37 tmp.tv_usec = itv->tv_usec % 1000000L;
38 if (tmp.tv_sec > MAX_SEC || tmp.tv_sec < MIN_SEC)
39 return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
40 tntx.offset = tmp.tv_usec + tmp.tv_sec * 1000000L;
41 tntx.modes = ADJ_OFFSET_SINGLESHOT;
42 }
43 else
44 tntx.modes = ADJ_OFFSET_SS_READ;
45
46 if (__glibc_unlikely (__clock_adjtime64 (CLOCK_REALTIME, &tntx) < 0))
47 return -1;
48
49 if (otv)
50 {
51 if (tntx.offset < 0)
52 {
53 otv->tv_usec = -(-tntx.offset % 1000000);
54 otv->tv_sec = -(-tntx.offset / 1000000);
55 }
56 else
57 {
58 otv->tv_usec = tntx.offset % 1000000;
59 otv->tv_sec = tntx.offset / 1000000;
60 }
61 }
62 return 0;
63}
64
65#if __TIMESIZE != 64
66libc_hidden_def (__adjtime64)
67
68int
69__adjtime (const struct timeval *itv, struct timeval *otv)
70{
71 struct __timeval64 itv64, otv64;
72 int retval;
73
74 itv64 = valid_timeval_to_timeval64 (*itv);
75 retval = __adjtime64 (&itv64, otv != NULL ? &otv64 : NULL);
76 if (otv != NULL)
77 *otv = valid_timeval64_to_timeval (otv64);
78
79 return retval;
80}
81#endif
82
83#ifdef VERSION_adjtime
84weak_alias (__adjtime, __wadjtime);
85default_symbol_version (__wadjtime, adjtime, VERSION_adjtime);
86#else
87weak_alias (__adjtime, adjtime)
88#endif
89