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ef030f7f | 1 | /* Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc. |
478b92f0 | 2 | This file is part of the GNU C Library. |
d2f5be2a | 3 | |
478b92f0 UD |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Library General Public License as | |
6 | published by the Free Software Foundation; either version 2 of the | |
7 | License, or (at your option) any later version. | |
d2f5be2a | 8 | |
478b92f0 UD |
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 | Library General Public License for more details. | |
d2f5be2a | 13 | |
478b92f0 UD |
14 | You should have received a copy of the GNU Library General Public |
15 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
16 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
17 | Boston, MA 02111-1307, USA. */ | |
d2f5be2a UD |
18 | |
19 | #include <errno.h> | |
20 | #include <limits.h> | |
21 | #include <sys/time.h> | |
22 | #include <sys/timex.h> | |
23 | ||
b20e47cb RM |
24 | #define MAX_SEC (INT_MAX / 1000000L - 2) |
25 | #define MIN_SEC (INT_MIN / 1000000L + 2) | |
d2f5be2a | 26 | |
a6e3a56a UD |
27 | #ifndef MOD_OFFSET |
28 | #define modes mode | |
29 | #endif | |
30 | ||
31 | #ifndef TIMEVAL | |
32 | #define TIMEVAL timeval | |
33 | #endif | |
34 | ||
35 | #ifndef TIMEX | |
36 | #define TIMEX timex | |
37 | #endif | |
38 | ||
39 | #ifndef ADJTIME | |
40 | #define ADJTIME __adjtime | |
41 | #endif | |
42 | ||
43 | #ifndef ADJTIMEX | |
44 | #define NO_LOCAL_ADJTIME | |
45 | #define ADJTIMEX(x) __adjtimex (x) | |
46 | #endif | |
47 | ||
48 | #ifndef LINKAGE | |
49 | #define LINKAGE | |
50 | #endif | |
51 | ||
52 | LINKAGE int | |
53 | ADJTIME (itv, otv) | |
54 | const struct TIMEVAL *itv; | |
55 | struct TIMEVAL *otv; | |
d2f5be2a | 56 | { |
a6e3a56a | 57 | struct TIMEX tntx; |
d2f5be2a UD |
58 | |
59 | if (itv) | |
60 | { | |
a6e3a56a | 61 | struct TIMEVAL tmp; |
d2f5be2a UD |
62 | |
63 | /* We will do some check here. */ | |
64 | tmp.tv_sec = itv->tv_sec + itv->tv_usec / 1000000L; | |
65 | tmp.tv_usec = itv->tv_usec % 1000000L; | |
66 | if (tmp.tv_sec > MAX_SEC || tmp.tv_sec < MIN_SEC) | |
67 | { | |
c4029823 | 68 | __set_errno (EINVAL); |
d2f5be2a UD |
69 | return -1; |
70 | } | |
71 | tntx.offset = tmp.tv_usec + tmp.tv_sec * 1000000L; | |
41cfadd6 | 72 | tntx.modes = ADJ_OFFSET_SINGLESHOT; |
d2f5be2a UD |
73 | } |
74 | else | |
41cfadd6 | 75 | tntx.modes = 0; |
d2f5be2a | 76 | |
a6e3a56a UD |
77 | if (ADJTIMEX (&tntx) < 0) |
78 | return -1; | |
d2f5be2a UD |
79 | |
80 | if (otv) | |
81 | { | |
82 | if (tntx.offset < 0) | |
83 | { | |
84 | otv->tv_usec = -(-tntx.offset % 1000000); | |
85 | otv->tv_sec = -(-tntx.offset / 1000000); | |
86 | } | |
87 | else | |
88 | { | |
89 | otv->tv_usec = tntx.offset % 1000000; | |
90 | otv->tv_sec = tntx.offset / 1000000; | |
91 | } | |
92 | } | |
93 | return 0; | |
94 | } | |
95 | ||
a6e3a56a | 96 | #ifdef NO_LOCAL_ADJTIME |
d2f5be2a | 97 | weak_alias (__adjtime, adjtime) |
a6e3a56a | 98 | #endif |