Minor bug fixes for login.lua, buildit.s, rc.pcmcia

Here are 4 rather trivial bugs I came across, and possible patches
to TomsRTBT-2.0.103 for them.

(1)  bin/login.lua - wrong check for disabled account.
It checks the MD5 of the typed-in password for * rather than the line
from /etc/passwd.
(2) bin/login.lua only does prefix match on username.
So, for example, you can log in as 'r' for root.

--- 2.orig/bin/login.lua	Tue Apr 23 14:40:20 2002
+++ 2/bin/login.lua	Wed May  8 19:20:40 2002
@@ -9,7 +9,7 @@
 while 1 do
 	B=read()
 	if not B then break end
-	if strsub(B,1,strlen(arg[2]))==arg[2] then
+	if strsub(B,1,strfind(B,":")-1)==arg[2] then
 		P=strsub(B,strfind(B,":")+1)
 		P=strsub(P,1,strfind(P,":")-1)
 		S=strsub(B,strfindlast(B,":")+1,-1)
@@ -28,7 +28,7 @@
 readfrom("|echo -n "..R.."|md5sum")
 X=strsub(read(),1,32)
 execute("yecho")
-if X=="*" then bad() end
+if P=="*" then bad() end
 if X==P then
 execute("ile "..S.." -c \". /etc/profile\" -si")
 else bad() end


(3) buildit.s script hard-codes kernel name bz2bzImage in lilo.conf.
It should use $KERNEL as defined in settings.s. (With this fix I can use
a bzImage kernel.)

--- 2.orig/bin/buildit.s	Sat Apr 20 20:52:05 2002
+++ 2/bin/buildit.s	Wed May  8 19:19:41 2002
@@ -108,7 +108,7 @@
 	read-write
 	vga=ask
 	prompt
-	image=$MP/bz2bzImage
+	image=$MP/$KERNEL
 	root=$FD
 	append="load_ramdisk=1 prompt_ramdisk=0 ramdisk_start=$O1 parport=0x378,7"
 !


(4) Syntax error in rc.pcmcia: "[: /var/run/pcmcia-scheme: unknown operand"
This seems to be from using -O ('is owned by the effective user ID'), which
apparently isn't a valid test operand for ash (when using built-in test).
I don't see much harm in taking it out.

--- 2.orig/etc/rc.pcmcia	Mon Apr  8 00:06:51 2002
+++ 2/etc/rc.pcmcia	Wed May  8 19:19:26 2002
@@ -30,7 +30,7 @@
 	echo -n "Starting PCMCIA:"
 	    SC=/var/run/pcmcia-scheme
 	    RUN=/var/run
-	if [ -L $SC -o ! -O $SC ] ; then rm -f $SC ; fi
+	if [ -L $SC ] ; then rm -f $SC ; fi
 	if [ ! -f $SC ] ; then touch $SC ; fi
 	if [ "$SCHEME" ] ; then echo $SCHEME > $SC ; fi
 	grep -q pcmcia /proc/devices