I'm trying to figure out what words does the -interactive option of cp accepts as input.
For your convenience, here's code that sets up files for experimentation.
touch example_file{1..3}
mkdir example_dir
cp example_file? example_dir
cp -i example_file? example_dir
The shell then asks interactively for each file whether it should be overwritten. It seems to accept all sorts of random input.
cp: overwrite 'example_dir/example_file1'? q
cp: overwrite 'example_dir/example_file2'? w
cp: overwrite 'example_dir/example_file3'? e
I tried looking into the source code …
这是巴什。这种行为在鱼类中是相似的。
$ which python
/usr/bin/python
$ alias py=python
$ type py
py is aliased to `python'
？然后，运行type -P py什么也不打印，正如我所期望的那样以/usr/bin/pyton与下面看到的类似的方式打印。？
$ type ls
ls is aliased to `ls --color=auto'
$ type -P ls
/bin/ls
该-P选项的文档读取
-P force a PATH search for each NAME, even if it is an alias,
builtin, or function, and returns the name of the disk file
that would be executed
我已经确认/usr/bin（所在的目录python）在PATH.
这里发生了什么？