1 | /* Copyright (C) 1991-2022 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 <sys/time.h> |
20 | #include <hurd.h> |
21 | |
22 | /* Adjust the current time of day by the amount in DELTA. |
23 | If OLDDELTA is not NULL, it is filled in with the amount |
24 | of time adjustment remaining to be done from the last `__adjtime' call. |
25 | This call is restricted to the super-user. */ |
26 | int |
27 | __adjtime (const struct timeval *delta, struct timeval *olddelta) |
28 | { |
29 | error_t err; |
30 | mach_port_t hostpriv; |
31 | struct timeval dummy; |
32 | |
33 | err = __get_privileged_ports (&hostpriv, NULL); |
34 | if (err) |
35 | return __hurd_fail (EPERM); |
36 | |
37 | if (olddelta == NULL) |
38 | olddelta = &dummy; |
39 | |
40 | err = __host_adjust_time (hostpriv, |
41 | /* `time_value_t' and `struct timeval' are in |
42 | fact identical with the names changed. */ |
43 | *(time_value_t *) delta, |
44 | (time_value_t *) olddelta); |
45 | __mach_port_deallocate (__mach_task_self (), hostpriv); |
46 | |
47 | if (err) |
48 | return __hurd_fail (err); |
49 | return 0; |
50 | } |
51 | |
52 | weak_alias (__adjtime, adjtime) |
53 | |