cp does not copy named pipes

[jaggededgedjustice]

If you try to copy a named pipe cp will fail with cp: error: '<source>' -> '<dest>': the source path is not an existing regular file. You can see this with the following test:

mkfifo /tmp/fifo
cp /tmp/fifo /tmp/fifo-cp &
echo test >/tmp/fifo 

This will not error with GNU cp, and will create /tmp/fifo-cp with the contents echoed into /tmp/fifo

[sylvestre]

Probably the same as
rust-lang/rust#79390

[jfinkels]

This seems to be fixed:

$ mkfifo fifo
$ ./target/debug/cp fifo fifo2 &
[1] 977284
$ echo test > fifo
$ cat fifo2
test
[1]+  Done                    ./target/debug/cp fifo fifo2