dbootstrap: understanding is_cdrom_image

[Adam Di Carlo <adam@onshore.com>]

Ben, you wrote this function and I don't quite understand it:

/* This may get more complex...leave it simple for now */
int
is_cdrom_image(void)
{
    struct stat statbuf;
    if (NAME_ISREG("/cdrom_image",&statbuf) || bootargs.cdrom) {
	if (NAME_ISDIR("/dists",&statbuf))
	    return 2;
	else
	    return 1;
    } else
	return 0;
}

Please explain to me what the return values represent.

The problem here is that when the user select "install XXX from
CD-ROM", I want an accurate test of whether or not this is an official
CD-ROM or not.  Which *doesn't* rely on the bootargs to be set
correctly.

Apparently non-zero return values means its some sort of CD-ROM
ismage.  I would presume that '2' represents booting from a CD-image
(thus we have /dists).  What I need is something like:

    if (NAME_ISREG("/cdrom_image",&statbuf) || bootargs.cdrom) {
	if (NAME_ISDIR("/dists",&statbuf))
	    return 2;
	else
	    return 1;
    } elsif (NAME_ISREG("/instmnt/.disks/info") {
	return 1;
    } else
        return 0;

Does this seem correct?

-- 
.....Adam Di Carlo....adam@onShore.com.....<URL:http://www.onShore.com/>