mirror of https://github.com/k3s-io/k3s
57 lines
1.2 KiB
Go
57 lines
1.2 KiB
Go
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package procfs
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import (
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"bufio"
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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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// Stat represents kernel/system statistics.
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type Stat struct {
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// Boot time in seconds since the Epoch.
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BootTime int64
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}
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// NewStat returns kernel/system statistics read from /proc/stat.
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func NewStat() (Stat, error) {
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fs, err := NewFS(DefaultMountPoint)
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if err != nil {
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return Stat{}, err
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}
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return fs.NewStat()
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}
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// NewStat returns an information about current kernel/system statistics.
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func (fs FS) NewStat() (Stat, error) {
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f, err := os.Open(fs.Path("stat"))
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if err != nil {
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return Stat{}, err
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}
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defer f.Close()
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s := bufio.NewScanner(f)
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for s.Scan() {
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line := s.Text()
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if !strings.HasPrefix(line, "btime") {
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continue
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}
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fields := strings.Fields(line)
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if len(fields) != 2 {
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return Stat{}, fmt.Errorf("couldn't parse %s line %s", f.Name(), line)
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}
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i, err := strconv.ParseInt(fields[1], 10, 32)
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if err != nil {
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return Stat{}, fmt.Errorf("couldn't parse %s: %s", fields[1], err)
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}
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return Stat{BootTime: i}, nil
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}
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if err := s.Err(); err != nil {
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return Stat{}, fmt.Errorf("couldn't parse %s: %s", f.Name(), err)
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}
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return Stat{}, fmt.Errorf("couldn't parse %s, missing btime", f.Name())
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}
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