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mem.go
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mem.go
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//
// This file is part of go-system-stats library
//
// Copyright (C) 2017 Arduino AG (http://www.arduino.cc/)
//
// 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.
//
package mem
import (
"fmt"
"io/ioutil"
"strconv"
"strings"
)
// Stats contains data about the memory avaible/used
type Stats struct {
FreeMem uint64
TotalMem uint64
AvailableMem uint64
Buffers uint64
Cached uint64
FreeSwapMem uint64
TotalSwapMem uint64
}
// GetStats returns the current memory usage status
func GetStats() (*Stats, error) {
data, err := ioutil.ReadFile("/proc/meminfo")
if err != nil {
return nil, fmt.Errorf("detecting mounted filesystems: %s", err)
}
memInfos := strings.Split(string(data), "\n")
res := &Stats{}
for _, l := range memInfos {
fields := strings.Fields(l)
if len(fields) < 2 {
continue
}
tag := fields[0]
val, err := strconv.ParseUint(fields[1], 10, 64)
if err != nil {
continue
}
switch tag {
case "MemTotal:":
res.TotalMem = val
case "MemFree:":
res.FreeMem = val
case "MemAvailable:":
res.AvailableMem = val
case "Buffers:":
res.Buffers = val
case "Cached:":
res.Cached = val
case "SwapTotal:":
res.TotalSwapMem = val
case "SwapFree:":
res.FreeSwapMem = val
}
}
return res, nil
}