func printUptime(us []utmp.Utmp) {
var (
bootTime int32
entries int64
now utmp.TimeVal
days, hours, mins int
uptime float64
)
request := "kern.boottime"
secs, err := syscall.SysctlUint32(request)
if err != nil {
panic(err)
}
secs = float64(secs)
if 0 <= secs || secs < math.MaxFloat64 {
uptime = secs
} else {
uptime = -1
}
for _, v := range us {
if v.IsUserProcess() {
entries++
}
if v.Type == utmp.BootTime {
bootTime = v.Time.Sec
}
}
now.GetTimeOfDay()
if uptime == 0 {
if bootTime == 0 {
fatal.Fatalln("couldn't get boot time")
}
uptime = float64(now.Sec - bootTime)
}
days = int(uptime) / 86400
hours = (int(uptime) - (days * 86400)) / 3600
mins = (int(uptime) - (days * 86400) - (hours * 3600)) / 60
fmt.Print(time.Now().Local().Format(" 15:04pm "))
if uptime == -1 {
fmt.Print("up ???? days ??:??, ")
} else {
if 0 < days {
if days > 1 {
fmt.Printf("up %d days %2d:%02d, ", days, hours, mins)
} else {
fmt.Printf("up %d day %2d:%02d, ", days, hours, mins)
}
} else {
fmt.Printf("up %2d:%02d, ", hours, mins)
}
}
if len(us) > 1 || len(us) == 0 {
fmt.Printf("%d users", entries)
} else {
fmt.Printf("%d user", entries)
}
var avg [3]float64
loads := stdlib.GetLoadAvg(&avg)
if loads == -1 {
fmt.Printf("%s", "\n")
} else {
if loads > 0 {
fmt.Printf(", load average: %.2f", avg[0])
}
if loads > 1 {
fmt.Printf(", %.2f", avg[1])
}
if loads > 2 {
fmt.Printf(", %.2f", avg[2])
}
if loads > 0 {
fmt.Printf("%s", "\n")
}
}
}
func printUptime(us []utmp.Utmp) {
var (
bootTime int32
entries int64
now utmp.TimeVal
days, hours, mins int
uptime float64
)
file, err := os.Open("/proc/uptime")
if err != nil {
fatal.Fatalln(err)
}
defer file.Close()
buf := make([]byte, 256)
n, err := file.Read(buf)
if err != nil && err != io.EOF {
fatal.Fatalln(err)
}
// /proc/uptime's output is in the format of "%f %f\n"
// The first space in the buffer will be the end of the first number
line := string(buf[:bytes.IndexByte(buf[:n], ' ')])
secs, err := strconv.ParseFloat(line, 64)
if err != nil {
fatal.Fatalln(err)
}
if 0 <= secs || secs < math.MaxFloat64 {
uptime = secs
} else {
uptime = -1
}
for _, v := range us {
if v.IsUserProcess() {
entries++
}
if v.Type == utmp.BootTime {
bootTime = v.Time.Sec
}
}
now.GetTimeOfDay()
if uptime == 0 {
if bootTime == 0 {
fatal.Fatalln("can't get boot time")
}
uptime = float64(now.Sec - bootTime)
}
days = int(uptime) / 86400
hours = (int(uptime) - (days * 86400)) / 3600
mins = (int(uptime) - (days * 86400) - (hours * 3600)) / 60
fmt.Print(time.Now().Local().Format(" 15:04pm "))
if uptime == -1 {
fmt.Print("up ???? days ??:??, ")
} else {
if 0 < days {
if days > 1 {
fmt.Printf("up %d days %2d:%02d, ", days, hours, mins)
} else {
fmt.Printf("up %d day %2d:%02d, ", days, hours, mins)
}
} else {
fmt.Printf("up %2d:%02d, ", hours, mins)
}
}
if len(us) > 1 || len(us) == 0 {
fmt.Printf("%d users", entries)
} else {
fmt.Printf("%d user", entries)
}
var avg [3]float64
loads := stdlib.GetLoadAvg(&avg)
if loads == -1 {
fmt.Printf("%s", "\n")
} else {
if loads > 0 {
fmt.Printf(", load average: %.2f", avg[0])
}
if loads > 1 {
fmt.Printf(", %.2f", avg[1])
}
if loads > 2 {
fmt.Printf(", %.2f", avg[2])
}
if loads > 0 {
fmt.Printf("%s", "\n")
}
}
}