47 lines
829 B
Go
47 lines
829 B
Go
//go:build linux
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package hoststats
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import (
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"bufio"
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"context"
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"fmt"
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"os"
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"strconv"
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"strings"
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)
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func readMemory(context.Context) (Memory, error) {
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f, err := os.Open("/proc/meminfo")
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if err != nil {
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return Memory{}, err
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}
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defer f.Close()
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var total, available int64
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s := bufio.NewScanner(f)
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for s.Scan() {
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fields := strings.Fields(s.Text())
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if len(fields) < 2 {
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continue
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}
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v, _ := strconv.ParseInt(fields[1], 10, 64)
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switch strings.TrimSuffix(fields[0], ":") {
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case "MemTotal":
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total = v * 1024
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case "MemAvailable":
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available = v * 1024
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}
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}
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if err := s.Err(); err != nil {
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return Memory{}, err
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}
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if total <= 0 {
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return Memory{}, fmt.Errorf("MemTotal unavailable")
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}
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used := total - available
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if used < 0 {
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used = 0
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}
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return Memory{TotalBytes: total, UsedBytes: used}, nil
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}
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