1/* Copyright (C) 1995-2021 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#include <sysdep.h>
23
24#define MAX_SEC (INT_MAX / 1000000L - 2)
25#define MIN_SEC (INT_MIN / 1000000L + 2)
26
27int
28__adjtime64 (const struct __timeval64 *itv, struct __timeval64 *otv)
29{
30 struct __timex64 tntx;
31
32 if (itv)
33 {
34 struct __timeval64 tmp;
35
36 /* We will do some check here. */
37 tmp.tv_sec = itv->tv_sec + itv->tv_usec / 1000000L;
38 tmp.tv_usec = itv->tv_usec % 1000000L;
39 if (tmp.tv_sec > MAX_SEC || tmp.tv_sec < MIN_SEC)
40 return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
41 tntx.offset = tmp.tv_usec + tmp.tv_sec * 1000000L;
42 tntx.modes = ADJ_OFFSET_SINGLESHOT;
43 }
44 else
45 tntx.modes = ADJ_OFFSET_SS_READ;
46
47 if (__glibc_unlikely (__clock_adjtime64 (CLOCK_REALTIME, &tntx) < 0))
48 return -1;
49
50 if (otv)
51 {
52 if (tntx.offset < 0)
53 {
54 otv->tv_usec = -(-tntx.offset % 1000000);
55 otv->tv_sec = -(-tntx.offset / 1000000);
56 }
57 else
58 {
59 otv->tv_usec = tntx.offset % 1000000;
60 otv->tv_sec = tntx.offset / 1000000;
61 }
62 }
63 return 0;
64}
65
66#if __TIMESIZE != 64
67libc_hidden_def (__adjtime64)
68
69int
70__adjtime (const struct timeval *itv, struct timeval *otv)
71{
72 struct __timeval64 itv64, *pitv64 = NULL;
73 struct __timeval64 otv64;
74 int retval;
75
76 if (itv != NULL)
77 {
78 itv64 = valid_timeval_to_timeval64 (*itv);
79 pitv64 = &itv64;
80 }
81 retval = __adjtime64 (pitv64, otv != NULL ? &otv64 : NULL);
82 if (otv != NULL)
83 *otv = valid_timeval64_to_timeval (otv64);
84
85 return retval;
86}
87#endif
88
89#ifdef VERSION_adjtime
90weak_alias (__adjtime, __wadjtime);
91default_symbol_version (__wadjtime, adjtime, VERSION_adjtime);
92#else
93weak_alias (__adjtime, adjtime)
94#endif
95