Question

每次下载youtube文件（例如abc.mp4）时，我都会通过在bash终端中手动执行以下命令来立即更改其日期/时间戳：touch -d "$(date)" "abc.mp4"。

如果文件具有嵌入的感叹号（例如ab!c.mp4），则例外效果很好。然后，以下命令发生故障：touch -d "$(date)" "ab!c.mp4"。

实验中，我尝试：touch -d "$(date)" "ab\!c.mp4"：不高兴，touch命令创建了一个新的空文件，名称为ab\!c.mp4。

我的 kludgy 解决方案是手动重命名youtube文件，从其名称中删除感叹号，然后执行touch命令。

是否有一种更优雅的方法可以将感叹号保留在文件名中？

Answer 1

尝试在set +H命令之前调用touch，或仅使用单引号：touch -d "$(date)" 'ab!c.mp4'。

Answer 2

关闭历史记录扩展（设置+ H）或使用单引号。例如：

$ echo "foo!bar"
bash: !bar": event not found
$ echo 'foo!bar'
foo!bar
$ set +H
$ echo "foo!bar"
foo!bar

从联机帮助页：

Only backslash (\) and single quotes can quote the history expansion character.

此外，供参考：

Enclosing characters in double quotes preserves the literal value of all characters within the quotes, with the exception of $, `, \, and, when history expansion is enabled, !.  The characters $ and ` retain their special meaning within double quotes.  The backslash retains its special meaning only when followed by one of the following characters: $, `, ", \,  or <newline>.   A  double  quote  may  be quoted within double quotes by preceding it with a backslash.  If enabled, history expansion will be performed unless an !  appearing in double quotes is escaped using a backslash.  The backslash  preceding the !  is not removed.

触摸字符串中转义感叹号

2 个答案: