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staros/os_linux.go

120 lines
2.6 KiB
Go

// +build !windows
package staros
import (
"fmt"
"io/ioutil"
"os/user"
"strconv"
"strings"
"syscall"
"time"
)
// StartTime 开机时间
func StartTime() time.Time {
tmp, _ := readAsString("/proc/stat")
data := splitBy(ReplaceByte9(tmp), " ")
btime, _ := strconv.ParseInt(strings.TrimSpace(data["btime"]), 10, 64)
return time.Unix(btime, 0)
}
// IsRoot 当前是否是管理员用户
func IsRoot() bool {
uid, _ := user.Current()
if uid.Uid == "0" {
return true
}
return false
}
// Memory 系统内存信息
func Memory() MemStatus {
var mem MemStatus
ram := new(syscall.Sysinfo_t)
if err := syscall.Sysinfo(ram); err != nil {
return mem
}
mem.All = ram.Totalram
mem.BuffCache = ram.Bufferram
mem.Free = ram.Freeram
mem.Shared = ram.Sharedram
mem.Available = ram.Freeram + ram.Sharedram + ram.Bufferram
mem.SwapAll = ram.Totalswap
mem.SwapFree = ram.Freeswap
mem.SwapUsed = mem.SwapAll - mem.SwapFree
mem.Used = mem.All - mem.Free
return mem
}
func Whoami() (uid, gid int, uname, gname, home string, err error) {
var me *user.User
var gup *user.Group
me, err = user.Current()
if err != nil {
return
}
uid, _ = strconv.Atoi(me.Uid)
gid, _ = strconv.Atoi(me.Uid)
home = me.HomeDir
uname = me.Username
gup, err = user.LookupGroupId(me.Gid)
if err != nil {
return
}
gname = gup.Name
return
}
func getCPUSample() (idle, total uint64) {
contents, err := ioutil.ReadFile("/proc/stat")
if err != nil {
return
}
lines := strings.Split(string(contents), "\n")
for _, line := range lines {
fields := strings.Fields(line)
if fields[0] == "cpu" {
numFields := len(fields)
for i := 1; i < numFields; i++ {
val, err := strconv.ParseUint(fields[i], 10, 64)
if err != nil {
fmt.Println("Error: ", i, fields[i], err)
}
total += val // tally up all the numbers to get total ticks
if i == 4 { // idle is the 5th field in the cpu line
idle = val
}
}
return
}
}
return
}
// CpuUsage 获取CPU使用量
func CpuUsage(sleep time.Duration) float64 {
idle0, total0 := getCPUSample()
time.Sleep(sleep)
idle1, total1 := getCPUSample()
idleTicks := float64(idle1 - idle0)
totalTicks := float64(total1 - total0)
cpuUsage := 100 * (totalTicks - idleTicks) / totalTicks
return cpuUsage
//fmt.Printf("CPU usage is %f%% [busy: %f, total: %f]\n", cpuUsage, totalTicks-idleTicks, totalTicks)
}
func DiskUsage(path string) (disk DiskStatus) {
fs := syscall.Statfs_t{}
err := syscall.Statfs(path, &fs)
if err != nil {
return
}
disk.All = fs.Blocks * uint64(fs.Bsize)
disk.Free = fs.Bfree * uint64(fs.Bsize)
disk.Available = fs.Bavail * uint64(fs.Bsize)
disk.Used = disk.All - disk.Free
return
}