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CONTRIBUTING.md
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MAINTAINERS.md
Makefile
Makefile.common
NOTICE
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arp.go
buddyinfo.go
cpuinfo.go
cpuinfo_armx.go
cpuinfo_mipsx.go
cpuinfo_others.go
cpuinfo_ppcx.go
cpuinfo_s390x.go
cpuinfo_x86.go
crypto.go
doc.go
fixtures.ttar
fs.go
fscache.go
go.mod
go.sum
ipvs.go
kernel_random.go
loadavg.go
mdstat.go
meminfo.go
mountinfo.go
mountstats.go
net_conntrackstat.go
net_dev.go
net_sockstat.go
net_softnet.go
net_udp.go
net_unix.go
proc.go
proc_cgroup.go
proc_environ.go
proc_fdinfo.go
proc_io.go
proc_limits.go
proc_maps.go
proc_ns.go
proc_psi.go
proc_smaps.go
proc_stat.go
proc_status.go
schedstat.go
stat.go
swaps.go
ttar
vm.go
xfrm.go
zoneinfo.go
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LICENSE.md
Makefile
README.md
config.yaml
go.mod
go.sum
main.go
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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