talm

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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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// Package timex provides a simple wrapper around adjtimex syscall.
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package timex
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import (
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	"strings"
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	"golang.org/x/sys/unix"
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)
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// Status is bitmask field of statuses.
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type Status int32
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func (status Status) String() string {
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	var labels []string
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	for _, item := range []struct {
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		bit   Status
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		label string
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	}{
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		{unix.STA_PLL, "STA_PLL"},             /* enable PLL updates (rw) */
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		{unix.STA_PPSFREQ, "STA_PPSFREQ"},     /* enable PPS freq discipline (rw) */
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		{unix.STA_PPSTIME, "STA_PPSTIME"},     /* enable PPS time discipline (rw) */
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		{unix.STA_FLL, "STA_FLL"},             /* select frequency-lock mode (rw) */
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		{unix.STA_INS, "STA_INS"},             /* insert leap (rw) */
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		{unix.STA_DEL, "STA_DEL"},             /* delete leap (rw) */
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		{unix.STA_UNSYNC, "STA_UNSYNC"},       /* clock unsynchronized (rw) */
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		{unix.STA_FREQHOLD, "STA_FREQHOLD"},   /* hold frequency (rw) */
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		{unix.STA_PPSSIGNAL, "STA_PPSSIGNAL"}, /* PPS signal present (ro) */
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		{unix.STA_PPSJITTER, "STA_PPSJITTER"}, /* PPS signal jitter exceeded (ro) */
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		{unix.STA_PPSWANDER, "STA_PPSWANDER"}, /* PPS signal wander exceeded (ro) */
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		{unix.STA_PPSERROR, "STA_PPSERROR"},   /* PPS signal calibration error (ro) */
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		{unix.STA_CLOCKERR, "STA_CLOCKERR"},   /* clock hardware fault (ro) */
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		{unix.STA_NANO, "STA_NANO"},           /* resolution (0 = us, 1 = ns) (ro) */
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		{unix.STA_MODE, "STA_MODE"},           /* mode (0 = PLL, 1 = FLL) (ro) */
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		{unix.STA_CLK, "STA_CLK"},             /* clock source (0 = A, 1 = B) (ro) */
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	} {
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		if (status & item.bit) == item.bit {
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			labels = append(labels, item.label)
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		}
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	}
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	return strings.Join(labels, " | ")
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}
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// State is clock state.
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type State int
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func (state State) String() string {
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	switch state {
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	case unix.TIME_OK:
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		return "TIME_OK"
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	case unix.TIME_INS:
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		return "TIME_INS"
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	case unix.TIME_DEL:
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		return "TIME_DEL"
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	case unix.TIME_OOP:
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		return "TIME_OOP"
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	case unix.TIME_WAIT:
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		return "TIME_WAIT"
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	case unix.TIME_ERROR:
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		return "TIME_ERROR"
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	default:
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		return "TIME_UNKNOWN"
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	}
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}
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// Adjtimex provides a wrapper around syscall.Adjtimex.
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func Adjtimex(buf *unix.Timex) (state State, err error) {
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	st, err := unix.ClockAdjtime(unix.CLOCK_REALTIME, buf)
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	return State(st), err
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}
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