75 lines
1.3 KiB
Go
75 lines
1.3 KiB
Go
package main
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import (
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"bufio"
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"fmt"
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"log"
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"os"
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"strconv"
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"strings"
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)
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func (s *applyState) populateLoadavg() {
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if s.loadavg != nil {
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return
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}
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if b, err := os.ReadFile("/proc/loadavg"); err != nil {
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log.Printf("error reading loadavg: %s", err)
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} else {
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res := strings.SplitN(string(b), " ", 4)
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if len(res) >= 3 {
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s.loadavg = (*[3]string)(res[:3])
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return
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}
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log.Printf("unexpected loadavg raw: %s", string(b))
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}
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s.loadavg = &[3]string{"?", "?", "?"}
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}
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func (s *applyState) populateMem() {
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if s.mem != nil {
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return
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}
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// failure defaults
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s.mem = &[2]int{-1, -1}
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if f, err := os.Open("/proc/meminfo"); err != nil {
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log.Printf("error reading meminfo: %s", err)
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} else {
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defer func() {
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if err = f.Close(); err != nil {
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log.Fatalf("error closing meminfo: %s", err)
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}
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}()
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p := bufio.NewScanner(f)
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for p.Scan() {
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res := strings.SplitN(strings.ReplaceAll(p.Text(), " ", ""), ":", 2)
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if len(res) != 2 {
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fmt.Printf("unexpected meminfo line: %s", p.Text())
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return
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}
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format := func(r string) int {
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var v int
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if v, err = strconv.Atoi(r[:len(r)-2]); err != nil {
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log.Printf("error parsing meminfo value: %s", err)
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v = -1
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}
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return v
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}
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switch res[0] {
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case "MemFree":
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s.mem[0] = format(res[1])
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case "MemTotal":
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s.mem[1] = format(res[1])
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}
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}
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}
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}
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