1 files changed, 62 insertions, 0 deletions

diff --git a/vendor/github.com/prometheus/procfs/kernel_random.go b/vendor/github.com/prometheus/procfs/kernel_random.go
new file mode 100644
index 0000000..beefdf0
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/kernel_random.go
@@ -0,0 +1,62 @@
+// 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.
+
+// +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 bytes.
+        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
+}