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688903eb | 1 | /* Copyright (C) 1991-2018 Free Software Foundation, Inc. |
478b92f0 | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
478b92f0 | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
28f540f4 | 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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
28f540f4 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 | 17 | |
28f540f4 RM |
18 | #include <errno.h> |
19 | #include <time.h> | |
20 | #include <sys/time.h> | |
21 | ||
28f540f4 RM |
22 | /* Get the current time of day and timezone information, |
23 | putting it into *TV and *TZ. If TZ is NULL, *TZ is not filled. | |
24 | Returns 0 on success, -1 on errors. */ | |
25 | int | |
bd2260a2 | 26 | __gettimeofday (struct timeval *tv, struct timezone *tz) |
28f540f4 RM |
27 | { |
28 | if (tv == NULL) | |
29 | { | |
c4029823 | 30 | __set_errno (EINVAL); |
28f540f4 RM |
31 | return -1; |
32 | } | |
33 | ||
34 | tv->tv_sec = (long int) time ((time_t *) NULL); | |
35 | tv->tv_usec = 0L; | |
36 | ||
37 | if (tz != NULL) | |
38 | { | |
dcf0671d UD |
39 | const time_t timer = tv->tv_sec; |
40 | struct tm tm; | |
41 | const struct tm *tmp; | |
28f540f4 | 42 | |
dcf0671d UD |
43 | const long int save_timezone = __timezone; |
44 | const long int save_daylight = __daylight; | |
28f540f4 RM |
45 | char *save_tzname[2]; |
46 | save_tzname[0] = __tzname[0]; | |
47 | save_tzname[1] = __tzname[1]; | |
48 | ||
ec4b0518 | 49 | tmp = localtime_r (&timer, &tm); |
28f540f4 RM |
50 | |
51 | tz->tz_minuteswest = __timezone / 60; | |
52 | tz->tz_dsttime = __daylight; | |
53 | ||
54 | __timezone = save_timezone; | |
55 | __daylight = save_daylight; | |
56 | __tzname[0] = save_tzname[0]; | |
57 | __tzname[1] = save_tzname[1]; | |
58 | ||
dcf0671d | 59 | if (tmp == NULL) |
28f540f4 RM |
60 | return -1; |
61 | } | |
62 | ||
63 | return 0; | |
64 | } | |
d6c33fda | 65 | libc_hidden_def (__gettimeofday) |
28f540f4 | 66 | weak_alias (__gettimeofday, gettimeofday) |
d6c33fda | 67 | libc_hidden_weak (gettimeofday) |