1// Copyright 2023 The Go Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style 3// license that can be found in the LICENSE file. 4 5package sysinfo 6 7import ( 8 "bufio" 9 "bytes" 10 "io" 11 "os" 12 "strings" 13) 14 15func readLinuxProcCPUInfo(buf []byte) error { 16 f, err := os.Open("/proc/cpuinfo") 17 if err != nil { 18 return err 19 } 20 defer f.Close() 21 22 _, err = io.ReadFull(f, buf) 23 if err != nil && err != io.ErrUnexpectedEOF { 24 return err 25 } 26 27 return nil 28} 29 30func osCPUInfoName() string { 31 modelName := "" 32 cpuMHz := "" 33 34 // The 512-byte buffer is enough to hold the contents of CPU0 35 buf := make([]byte, 512) 36 err := readLinuxProcCPUInfo(buf) 37 if err != nil { 38 return "" 39 } 40 41 scanner := bufio.NewScanner(bytes.NewReader(buf)) 42 for scanner.Scan() { 43 key, value, found := strings.Cut(scanner.Text(), ": ") 44 if !found { 45 continue 46 } 47 switch strings.TrimSpace(key) { 48 case "Model Name", "model name": 49 modelName = value 50 case "CPU MHz", "cpu MHz": 51 cpuMHz = value 52 } 53 } 54 55 if modelName == "" { 56 return "" 57 } 58 59 if cpuMHz == "" { 60 return modelName 61 } 62 63 // The modelName field already contains the frequency information, 64 // so the cpuMHz field information is not needed. 65 // modelName filed example: 66 // Intel(R) Core(TM) i7-10700 CPU @ 2.90GHz 67 f := [...]string{"GHz", "MHz"} 68 for _, v := range f { 69 if strings.Contains(modelName, v) { 70 return modelName 71 } 72 } 73 74 return modelName + " @ " + cpuMHz + "MHz" 75} 76