[Debian bug 781107] ssh-keygen -F return code has changed and is not documented

[Matthew Vernon]

On 24/03/15 22:53, Damien Miller wrote:
> On Tue, 24 Mar 2015, Matthew Vernon wrote:

>> Less controversially, could the return values of ssh-keygen and their
>> meanings be documented (and flagged when they change), please?
> 
> Sure, someone has to do the work though.

I had a look; ssh-keygen either exits 1 or 255 (via fatal). It's not
clear to me from reading the code what the rationale is for picking 1 or
255; what is the intended difference in meaning between these two errors
(or alternatively, how do you decide whether to call fatal or print and
error and exit(1))?

Thanks,

Matthew