How would I grep using STDIN as the query pattern, and a file as the subject?

Question

Without trivially saving stdin to a file, can I take the resulting output of stdin, and USE THAT as the pattern to search against a listing in a file?

Try this example: I have a long list.txt of lines containing filenames that I want to know if I currently have in my directory. It's the backwards equivalent of:

ls | grep -F -f  list.txt

My attempt goes as follows:

 grep -F -f  $( ls -1 ) list.txt

But that doesn't work. Is this even possible?

Answer 1

看起来您想使用关键字-或/dev/stdin作为原始格式的文件名。