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https://github.com/VictoriaMetrics/VictoriaMetrics.git
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7f4fb34182
It is better developing vmctl tool in VictoriaMetrics repository, so it could be released together with the rest of vmutils tools such as vmalert, vmagent, vmbackup, vmrestore and vmauth.
63 lines
2.1 KiB
Go
63 lines
2.1 KiB
Go
// Copyright 2020 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build !windows
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package procfs
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import (
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"os"
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"github.com/prometheus/procfs/internal/util"
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)
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// KernelRandom contains information about to the kernel's random number generator.
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type KernelRandom struct {
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// EntropyAvaliable gives the available entropy, in bits.
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EntropyAvaliable *uint64
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// PoolSize gives the size of the entropy pool, in bits.
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PoolSize *uint64
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// URandomMinReseedSeconds is the number of seconds after which the DRNG will be reseeded.
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URandomMinReseedSeconds *uint64
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// WriteWakeupThreshold the number of bits of entropy below which we wake up processes
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// that do a select(2) or poll(2) for write access to /dev/random.
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WriteWakeupThreshold *uint64
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// ReadWakeupThreshold is the number of bits of entropy required for waking up processes that sleep
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// waiting for entropy from /dev/random.
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ReadWakeupThreshold *uint64
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}
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// KernelRandom returns values from /proc/sys/kernel/random.
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func (fs FS) KernelRandom() (KernelRandom, error) {
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random := KernelRandom{}
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for file, p := range map[string]**uint64{
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"entropy_avail": &random.EntropyAvaliable,
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"poolsize": &random.PoolSize,
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"urandom_min_reseed_secs": &random.URandomMinReseedSeconds,
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"write_wakeup_threshold": &random.WriteWakeupThreshold,
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"read_wakeup_threshold": &random.ReadWakeupThreshold,
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} {
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val, err := util.ReadUintFromFile(fs.proc.Path("sys", "kernel", "random", file))
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if os.IsNotExist(err) {
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continue
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}
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if err != nil {
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return random, err
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}
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*p = &val
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}
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return random, nil
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}
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