src

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cpu.go (588B)

      1 package cpu
      2 
      3 import (
      4 	"context"
      5 	"fmt"
      6 	"os"
      7 	"runtime"
      8 	"strings"
      9 )
     10 
     11 const path = "/proc/loadavg"
     12 
     13 type Block struct{}
     14 
     15 func New() *Block {
     16 	return &Block{}
     17 }
     18 
     19 func (b *Block) Name() string {
     20 	return "cpu"
     21 }
     22 
     23 func (b *Block) Render(ctx context.Context) (string, error) {
     24 	out, err := os.ReadFile(path)
     25 	if err != nil {
     26 		return "", fmt.Errorf("failed to read %s: %v", path, err)
     27 	}
     28 
     29 	if fields := strings.Fields(string(out)); len(fields) >= 1 {
     30 		return fmt.Sprintf(" %s/%d", fields[0], runtime.NumCPU()), nil
     31 	} else {
     32 		return fmt.Sprintf(" /%d", runtime.NumCPU()), nil
     33 	}
     34 }