[Fedora-livecd-list] livecd-iso-to-disk.sh and extension size

[D. Hugh Redelmeier]

I've often had problems with putting Linux on USB sticks.  Fedora, 
Ubuntu, and CentOS have been hit or miss.  I decided to be a little more 
adventurous with Fedora 19.

I decided to use livecd-iso-to-disk.sh so that I could know better what 
was going on.

(Is it time to change the name?  Fedora Live no longer fits on a CD
these days.  It's great on DVDs and USB sticks.)

I wanted a LARGE overlay (I wanted to experiment with installing 
updates).  When I tried
	sudo ./livecd-iso-to-disk.sh --format --overlay-size-mb 4095 --home-size-mb 200 --unencrypted-home Fedora-Live-Desktop-x86_64-19-1.iso /dev/sdi
it tried to create an MSDOS filesystem and consequently complained
that it was too big:
	mkfs.fat 3.0.20 (12 Jun 2013)
	Can't have an overlay of 2048MB or greater on VFAT

Why didn't it use ext[34]?  Reading the script, I found the answer: I
hadn't installed the systlinux-extlinux package on my host system.
There was no message to this effect.

I suggest something like this (untested!) patch be applied:

==== start
diff --git a/tools/livecd-iso-to-disk.sh b/tools/livecd-iso-to-disk.sh
index c4fb4db..0e65d3e 100755
--- a/tools/livecd-iso-to-disk.sh
+++ b/tools/livecd-iso-to-disk.sh
@@ -868,7 +868,10 @@ if [ -n "$format" -a -z "$skipcopy" ]; then
 
     if [ -n "$efi" ]; then
         createGPTLayout $TGTDEV
-    elif [ -n "$usemsdos" -o ! -x /sbin/extlinux ]; then
+    elif [ -n "$usemsdos" ]; then
+        createMSDOSLayout $TGTDEV
+    elif [ ! -x /sbin/extlinux ]; then
+        echo "Warning: syslinux-extlinux package not installed; formatting as VFAT filesystem instead of EXT"
         createMSDOSLayout $TGTDEV
     else
         createEXTFSLayout $TGTDEV
==== end