1 files changed, 77 insertions, 0 deletions
diff --git a/src/internal/sysinfo/cpuinfo_linux.go b/src/internal/sysinfo/cpuinfo_linux.go
new file mode 100644
index 0000000..aff63b3
--- /dev/null
+++ b/src/internal/sysinfo/cpuinfo_linux.go
@@ -0,0 +1,77 @@
+// 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"
+}