[9fans] Bug in bootable installation CD

[9fans] Bug in bootable installation CD

[Ram'on Garc'ia Fern'andez]

Hello,

I have been unable to install Plan 9 using the ISO image downloaded
today and booting from it. It fails to mount the virtual boot disk in
the ISO image. The reason is that the command boota: assumes that the
boot files are in a fat partition, and this is not the case with a
bootable CD.

The problem can be be fixed by modifying the following line of boota:
case sd*
	adisk=`{echo $bootfile | sed 's#(sd..).*#/dev/\1/dos#'}

replace /dos by /cdboot and it will work.

However, that change would break the installation from a FAT partition.
This can be solved by either having a different version of boota: in the
virtual floppy of the CD, or by testing both /dev/sdxx/dos and
/dev/sdxx/cdboot :

case sd*
	adisk=`{echo $bootfile | sed 's#(sd..).*#/dev/\1/dos#'}
	if (! test -f $adisk) {
		adisk=`{echo $bootfile | sed 's#(sd..).*#/dev/\1/cdboot#'}
	}

Thanks,
	Ramon