Setting an inputrc mapping for Ctrl-j kills the enter key

[trptcolin]

Having a line like these in ~/.inputrc prevents line input:

Control-j: next-history
Control-k: previous-history

Control-j is the problem one.

From the small bit of research I did, I see that Control-j is really the same as the Enter key, but in the only shell where I could get that setting to be used (bash), Control-j and Enter were treated differently. So maybe there's a way we can distinguish them in jline as well?

[hickst]

According to the readline documents, one can infer that Ctrl-j should NOT be the same as RETURN. For example:

"isearch-terminators - The string of characters that should terminate an incremental search without subsequently executing the character as a command. If this variable has not been given a value, the characters ESC and C-J will terminate an incremental search."

Note that C-J terminates incremental search WITHOUT executing the character as a command, whereas RETURN
is bound by default to the 'accept-line' function:

"accept-line (Newline or Return) - Accept the line regardless of where the cursor is."

[trptcolin]

OK, maybe this is obvious to others, but new to me: Ctrl-j is ASCII code 10 (newline), and Ctrl-m is ASCII code 13 (carriage return). In jline, all of Control-j, Control-m, and Enter end up coming through as 10. I traced this as far back as the underlying InputStream reads (it's 10 whether it comes from System.in or from the default FileInputStream wrapping FileDescriptor.in).

I'm assuming this makes sense to others just out of OS-specificness, but readline still must have some way of distinguishing - directly capturing the keys or something? git://git.savannah.gnu.org/readline.git

You can use Ctrl-v Ctrl-m, or Ctrl-v Enter, to actually get the code 13 to come through, but I'm stumped as far as getting it with plain old Ctrl-m or Enter.

Any ideas? Either I'm missing something, or there's no way to distinguish Ctrl-m from Ctrl-j on my setup (OSX, zsh and/or bash), given that we're going through a stream. Hoping I'm just missing something.