remove openbsd amd64 cgo

collector/boot_time_openbsd_amd64.go

@@ -0,0 +1,61 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !noboottime
+
+package collector
+
+import (
+	"github.com/go-kit/kit/log"
+	"github.com/prometheus/client_golang/prometheus"
+	"golang.org/x/sys/unix"
+	"unsafe"
+)
+
+type bootTimeCollector struct {
+	name, description string
+	logger            log.Logger
+}
+
+func init() {
+	registerCollector("boottime", defaultEnabled, newBootTimeCollector)
+}
+
+// newBootTimeCollector returns a new Collector exposing system boot time on BSD systems.
+func newBootTimeCollector(logger log.Logger) (Collector, error) {
+	return &bootTimeCollector{
+		name:        "boot_time_seconds",
+		description: "Unix time of last boot, including microseconds.",
+		logger:      logger,
+	}, nil
+}
+
+// Update pushes boot time onto ch
+func (c *bootTimeCollector) Update(ch chan<- prometheus.Metric) error {
+	raw, err := unix.SysctlRaw("kern.boottime")
+	if err != nil {
+		return err
+	}
+
+	tv := *(*unix.Timeval)(unsafe.Pointer(&raw[0]))
+	v := (float64(tv.Sec) + (float64(tv.Usec) / float64(1000*1000)))
+
+	ch <- prometheus.MustNewConstMetric(
+		prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, "", c.name),
+			c.description,
+			nil, nil,
+		), prometheus.GaugeValue, v)
+
+	return nil
+}