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// Copyright 2023 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package sysinfo
import (
"bufio"
"bytes"
"io"
"os"
"strings"
)
func readLinuxProcCPUInfo(buf []byte) error {
f, err := os.Open("/proc/cpuinfo")
if err != nil {
return err
}
defer f.Close()
_, err = io.ReadFull(f, buf)
if err != nil && err != io.ErrUnexpectedEOF {
return err
}
return nil
}
func osCpuInfoName() string {
modelName := ""
cpuMHz := ""
// The 512-byte buffer is enough to hold the contents of CPU0
buf := make([]byte, 512)
err := readLinuxProcCPUInfo(buf)
if err != nil {
return ""
}
scanner := bufio.NewScanner(bytes.NewReader(buf))
for scanner.Scan() {
line := scanner.Text()
if !strings.Contains(line, ":") {
continue
}
field := strings.SplitN(line, ": ", 2)
switch strings.TrimSpace(field[0]) {
case "Model Name", "model name":
modelName = field[1]
case "CPU MHz", "cpu MHz":
cpuMHz = field[1]
}
}
if modelName == "" {
return ""
}
if cpuMHz == "" {
return modelName
}
// The modelName field already contains the frequency information,
// so the cpuMHz field information is not needed.
// modelName filed example:
// Intel(R) Core(TM) i7-10700 CPU @ 2.90GHz
f := [...]string{"GHz", "MHz"}
for _, v := range f {
if strings.Contains(modelName, v) {
return modelName
}
}
return modelName + " @ " + cpuMHz + "MHz"
}