Function write2File

tars/util/debug/debugtool.go:16–33

write2File write byte array to file logname: prefix of the file's name, which is like logname.20060102-150405, and the file will locates in the same diretory as the bin file which calls it buf: call stack info

(logname string, desc string, buf []byte)

// will locates in the same diretory as the bin file which calls it
// buf: call stack info
func write2File(logname string, desc string, buf []byte) error {
	path, _ := filepath.Abs(filepath.Dir(os.Args[0]))
	os.Chdir(path)
	logpath := fmt.Sprintf("%s.%s", logname, time.Now().Format("20060102-150405"))

	var err error
	var file *os.File
	if file, err = os.OpenFile(logpath, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0644); err == nil {
		defer file.Close()
		if desc != "" {
			file.WriteString(desc + "\n\n")
		}
		file.WriteString(fmt.Sprintf("current running goroutine num: %d\n\n", runtime.NumGoroutine()))
		file.WriteString(string(buf))
		fmt.Println("successfully dump stack info into file")
	}
	return err
}

// DumpStack used to dump stack info to file
// all: true means dumping all running goroutine stack, else only dumping the one that calls the func