I have a command that gives me a list of files, one on each line. Filenames are "normal" - no spaces, no need to escape parentheses etc.
Now I want to pipe that command to something like
test -f and return true if and only if all of the files exist. (Behaviour with 0 lines can be undefined, I don't really care.)
So, something like
make_list_of_files | test -f
but actually working.
"Bashisms" are allowed, since I need it in Bash.
The files are not in the same directory, but they are in subdirectories of a current directory, and the paths have directory names in them, so for example
dir/file1 dir/file2 dir2/file3