检查文件名中是否存在包含空格的文件

Question

我正在Bash中测试一个文件是否存在，其中文件名使用$(printf '%q' "$FNAME")进行转义。

使用if [ -f $FNAME ]总是会产生错误，如下面注释的示例所示。如何测试包含空格和其他字符的文件名？

#!/usr/bin/env bash

# code used in Raspberry Pi Podcasting Jukebox project
# youtube-dl -f 17 --get-filename https://www.youtube.com/watch?v=AgkM5g_Ob-w
# returns "HOW ABUNDANCE WILL CHANGE THE WORLD - Elon Musk 2017-AgkM5g_Ob-w.3gp"

# Purpose: To test if file exists before downloading
# for testing purposes using an existing regular file "abc def ghi"
AFILE="abc def ghi"
TFILE=$(printf '%q' "$AFILE") # Escaping filename using printf
echo $TFILE # returns abc\ def\ ghi
# if [ -f $AFILE ] # this test returns false every time with error [:too many arguments

if [ -f $TFILE ] # This test also returns FALSE with err [: too many arguments
then
  echo "Existing"
  # don't download
else
  echo "Not existing"
  # youtube-dl http://www.youtube.com/watch?v=AgkM5g_Ob-w
fi