jschoubben
7f05fad58a
mesh/merge-gate pass: builds restic → ace, g14, novox, shanks; no bus step; every machine composes with the change as it did without (4 of 4 compose)
mesh/repo-check pass: its merge-check.sh passed, each part in its toolchain: merge-check.sh (go), merge-check-typescript.sh (typescript)
mesh/delivery delivered
A machine that backs up nothing read as missing its night after 26 hours up, and a laptop's count, last written before it slept, read as stale on waking until the next look (novox/hq issue 489).
31 lines
931 B
Go
31 lines
931 B
Go
package main
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// The machine's monotonic clock, shared by its processes: the night's process writes it beside its count and
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// the health tool, in another process, reads it again (novox/hq issue 489). Go's own monotonic reading is
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// only comparable within one process.
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import (
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"os"
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"strings"
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"syscall"
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"time"
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"unsafe"
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)
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const bootID = "/proc/sys/kernel/random/boot_id"
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// machineClock is this boot's id and CLOCK_MONOTONIC, which on Linux does not run while the machine is
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// suspended and begins again at each boot; "" and 0 when either cannot be read.
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func machineClock() (string, time.Duration) {
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raw, err := os.ReadFile(bootID)
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if err != nil {
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return "", 0
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}
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var ts syscall.Timespec
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const clockMonotonic = 1
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if _, _, e := syscall.Syscall(syscall.SYS_CLOCK_GETTIME, clockMonotonic, uintptr(unsafe.Pointer(&ts)), 0); e != 0 {
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return "", 0
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}
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return strings.TrimSpace(string(raw)), time.Duration(ts.Nano())
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}
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