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Cooperative email for PDS operators
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2.1 kB · 63 lines
Go
at main
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364// Copyright 2020 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.
//go:build !windows// +build !windows
package procfs
import ( "os"
"github.com/prometheus/procfs/internal/util")
// KernelRandom contains information about to the kernel's random number generator.type KernelRandom struct { // EntropyAvaliable gives the available entropy, in bits. EntropyAvaliable *uint64 // PoolSize gives the size of the entropy pool, in bits. PoolSize *uint64 // URandomMinReseedSeconds is the number of seconds after which the DRNG will be reseeded. URandomMinReseedSeconds *uint64 // WriteWakeupThreshold the number of bits of entropy below which we wake up processes // that do a select(2) or poll(2) for write access to /dev/random. WriteWakeupThreshold *uint64 // ReadWakeupThreshold is the number of bits of entropy required for waking up processes that sleep // waiting for entropy from /dev/random. ReadWakeupThreshold *uint64}
// KernelRandom returns values from /proc/sys/kernel/random.func (fs FS) KernelRandom() (KernelRandom, error) { random := KernelRandom{}
for file, p := range map[string]**uint64{ "entropy_avail": &random.EntropyAvaliable, "poolsize": &random.PoolSize, "urandom_min_reseed_secs": &random.URandomMinReseedSeconds, "write_wakeup_threshold": &random.WriteWakeupThreshold, "read_wakeup_threshold": &random.ReadWakeupThreshold, } { val, err := util.ReadUintFromFile(fs.proc.Path("sys", "kernel", "random", file)) if os.IsNotExist(err) { continue } if err != nil { return random, err } *p = &val }
return random, nil}