Re: Finding the dump

[Daniel Colascione]

>> Sure, but such callers are holding it wrong. If you set argv[0] to some
>> random string unrelated to Emacs, you break startup. That's fine.
>
> Indeed, this is sufficiently rare in my experience that I wouldn't worry
> about that case.
>
>>>> every system I've seen. Here's the algorithm: look at argv[0]: if it's
>>>> not an absolute path, make it absolute by prepending the startup CWD.
>>> If the executable is found on $PATH then argv[0] is *not* relative to
>>> CWD.
>> In that case, argv[0] will be absolute.
>
> That's not what I'm seeing on my system.
> When I type `emacs` into my shell (zsh under Debian), it is started with
> `emacs` as argv[0] and not with an absolute file name.

Ah, in my tests, the path to the program run becomes absolute during
shebang execution. For a raw executable, it's indeed pathless, but a
search should PATH should solve that problem. That's what Emacs does today
in init_cmdargs.