Subj : Re: File: writeln() and line endings
To   : All
From : nelgin
Date : Sat Apr 26 2025 19:34:21

On Sat, 26 Apr 2025 13:45:04 -0700
"Nightfox" (VERT/DIGDIST) <VERT/DIGDIST!Nightfox@endofthelinebbs.com>
wrote:

> Hi DM,
> 
> Recently I've been working on trying to get SlyEdit to behave in a
> way that it could be used to edit general files (and specifically,
> SSH keys & such, as it seems that might be useful at some point).
> I'm at a point where I've started doing a test to make sure SlyEdit
> is saving the file correctly:
> 
> There's a system set up where I have an SSH key shared with it so
> that I can SSH to it without entering a password, and my test is
> basically this: 1. Move my local ~/.ssh/id_rsa to a different place,
> and open it in a text editor (so I can copy it) 2. Edit ~/.ssh/id_rsa
> with SlyEdit (which at this point is a new file), then copy the
> contents of id_rsa from the text editor and paste it into my terminal
> session with SlyEdit, and save the file 3. Try to SSH to that remote
> system from my BBS machine and see if it's successful
> 
> After this, id_rsa looks fine, but SSH authentication fails (ssh says
> it loads id_rsa but it says "error in libcrypto" and prompts me for a
> password).  I've found that the reason seems to be id_rsa has
> DOS-style line endings (with \r\n) - I verified with a hex editor and
> saw that was indeed the case.  If I convert id_rsa with dos2unix, I'm
> able to successfully SSH to the other PC.
> 
> SlyEdit is writing the lines using the File.writeln() function.  I'm
> running my BBS on Linux; should writeln() be expected to write with
> \n line endings on Linux?
> 
> As a test, I tried having SlyEdit use write() (instead of writln()
> and append "\n" at the end of each line, but the lines in id_rsa
> still end with \r\n.  I also tried opening the file with binary (as
> "wb") but the file still had \r\n line endings.
> 
> Taking a step back, should I even be worrying about the line endings
> when saving files with SlyEdit? I'm not sure what the best course of
> action is here.

I'm not sure if this helps, but I have a modified version of
user_settings.js that allows you to create/edit/delete ssh keys. I just
took the rsa key from my Linux box and used the option in the setting
editor which used FSEditor to save the file.

If you want to try, I put it at
https://www.endofthelinebbs.com/user_settings.js

You'll want to create a text.ini entry so you can see the option. I
have all of mine modified but you can try this.

UserDefaultsPassword: " @~\1n\1h\1y(W)~W@ \1bChange Password or Signature    @~\x01n\x01h\x01y(O)~O@ \x01bAdd, Change, or Delete SSH Key\r\n"


and, of course, alter it to suit.

I think I remember the SlyEdit saves the text already wrapped but
FSEditor doesn't? You'll maybe want to check the user's sshkey file.
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