| 1 | /* clock_adjtime -- tune kernel clock. |
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| 2 | Copyright (C) 2020-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public License as |
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| 7 | published by the Free Software Foundation; either version 2.1 of the |
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| 8 | License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; see the file COPYING.LIB. If |
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| 17 | not, see <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <errno.h> |
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| 20 | #include <stdlib.h> |
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| 21 | #include <time.h> |
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| 22 | #include <sysdep.h> |
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| 23 | #include <sys/timex.h> |
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| 24 | #include <kernel-features.h> |
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| 25 | |
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| 26 | int |
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| 27 | __clock_adjtime64 (const clockid_t clock_id, struct __timex64 *tx64) |
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| 28 | { |
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| 29 | #ifndef __NR_clock_adjtime64 |
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| 30 | # define __NR_clock_adjtime64 __NR_clock_adjtime |
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| 31 | #endif |
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| 32 | int r = INLINE_SYSCALL_CALL (clock_adjtime64, clock_id, tx64); |
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| 33 | #ifndef __ASSUME_TIME64_SYSCALLS |
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| 34 | if (r >= 0 || errno != ENOSYS) |
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| 35 | return r; |
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| 36 | |
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| 37 | if (tx64->modes & ADJ_SETOFFSET |
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| 38 | && ! in_int32_t_range (tx64->time.tv_sec)) |
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| 39 | { |
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| 40 | __set_errno (EOVERFLOW); |
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| 41 | return -1; |
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| 42 | } |
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| 43 | |
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| 44 | struct timex tx32 = valid_timex64_to_timex (*tx64); |
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| 45 | r = INLINE_SYSCALL_CALL (clock_adjtime, clock_id, &tx32); |
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| 46 | if (r >= 0) |
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| 47 | *tx64 = valid_timex_to_timex64 (tx32); |
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| 48 | #endif |
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| 49 | return r; |
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| 50 | } |
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| 51 | |
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| 52 | #if __TIMESIZE != 64 |
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| 53 | libc_hidden_def (__clock_adjtime64) |
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| 54 | |
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| 55 | int |
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| 56 | __clock_adjtime (const clockid_t clock_id, struct timex *tx) |
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| 57 | { |
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| 58 | struct __timex64 tx64; |
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| 59 | int retval; |
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| 60 | |
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| 61 | tx64 = valid_timex_to_timex64 (*tx); |
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| 62 | retval = __clock_adjtime64 (clock_id, &tx64); |
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| 63 | if (retval >= 0) |
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| 64 | *tx = valid_timex64_to_timex (tx64); |
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| 65 | |
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| 66 | return retval; |
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| 67 | } |
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| 68 | #endif |
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| 69 | libc_hidden_def (__clock_adjtime); |
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| 70 | strong_alias (__clock_adjtime, clock_adjtime) |
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| 71 | |
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