| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package util |
| |
| import ( |
| "github.com/prometheus/procfs" |
| "os" |
| "strconv" |
| "unsafe" |
| ) |
| |
| const intSize = int(unsafe.Sizeof(0)) |
| |
| var bs *[intSize]byte |
| |
| func init() { |
| i := 0x1 |
| bs = (*[intSize]byte)(unsafe.Pointer(&i)) |
| } |
| |
| func IsBigEndian() bool { |
| return !IsLittleEndian() |
| } |
| |
| func IsLittleEndian() bool { |
| return bs[0] == 0 |
| } |
| |
| func PathExist(path string) bool { |
| _, err := os.Stat(path) |
| return err == nil || os.IsExist(err) |
| } |
| |
| func HostName() (hostname string) { |
| var err error |
| hostname, err = os.Hostname() |
| if err != nil { |
| hostname = "UNKNOWN" |
| } |
| return |
| } |
| |
| func GetEnvInt(name string, def int) int { |
| env, ok := os.LookupEnv(name) |
| if ok { |
| i64, err := strconv.ParseInt(env, 10, 0) |
| if err != nil { |
| return def |
| } |
| return int(i64) |
| } |
| return def |
| } |
| |
| func GetEnvString(name string, def string) string { |
| env, ok := os.LookupEnv(name) |
| if ok { |
| return env |
| } |
| return def |
| } |
| |
| func GetProcCPUUsage() (pt float64, ct float64) { |
| p, _ := procfs.NewProc(os.Getpid()) |
| stat, _ := procfs.NewStat() |
| pstat, _ := p.NewStat() |
| ct = stat.CPUTotal.User + stat.CPUTotal.Nice + stat.CPUTotal.System + |
| stat.CPUTotal.Idle + stat.CPUTotal.Iowait + stat.CPUTotal.IRQ + |
| stat.CPUTotal.SoftIRQ + stat.CPUTotal.Steal + stat.CPUTotal.Guest |
| pt = float64(pstat.UTime+pstat.STime+pstat.CUTime+pstat.CSTime) / 100 |
| return |
| } |