inst: provide gpt/mbr choice when disk is blank, format esp

rc/bin/inst/bootplan9

@@ -1,5 +1,20 @@
 #!/bin/rc
 
+# look for esp and format it when not already done
+esp=`{ls /dev/$disk/esp >[2]/dev/null}
+if(~ $#esp 1 && ! ~ fstype $esp dos){
+	echo
+	echo 'Here appears to be a unformated EFI system partition:'
+	echo '	' $esp
+	echo
+	prompt 'Initialize FAT on EFI system partition' yes no
+	switch($rd) {
+	case yes
+		# 4k clusters to force FAT32
+		disk/format -d -c 8 -l ESP $esp
+	}
+}
+
 # look for plan9 partition in the DOS partition table (if any)
 p9part=`{disk/fdisk /dev/$disk/data >[2]/dev/null </dev/null | grep PLAN9 | sed 1q | sed 's/ *(p.) .*/\1/'}
 if(~ $#p9part 0){
@@ -13,19 +28,15 @@ echo 'or a master boot record from a Unix clone (e.g., LILO or'
 echo 'FreeBSD bootmgr), it is probably safe to continue using'
 echo 'that boot record rather than install the Plan 9 boot record.'
 echo
-prompt 'Install the Plan 9 master boot record' y n 
+prompt 'Install the Plan 9 master boot record' yes no
 switch($rd) {
-case n
-	;
-case y
+case yes
 	disk/mbr -m /386/mbr /dev/$disk/data
 }
 
-prompt 'Mark the Plan 9 partition active' y n
+prompt 'Mark the Plan 9 partition active' yes no
 switch($rd) {
-case n
-	;
-case y
+case yes
 	{ echo 'A '^$p9part; echo w } | disk/fdisk /dev/$disk/data >[2]/dev/null >/dev/null
 	x=$status
 	if(~ $x '' '|'){

rc/bin/inst/bootsetup

@@ -1,6 +1,6 @@
 #!/bin/rc
 
-# desc: create a boot floppy or configure hard disk to boot plan 9
+# desc: configure hard disk to boot plan 9
 # prereq: copydist
 
 fats=()
@@ -73,7 +73,7 @@ case go
 
 	if(~ $need9fatformat yes){
 		log Initializing Plan 9 FAT partition.
-		logprog disk/format -r 2 -d -b /n/newfs/386/pbs $9fat
+		logprog disk/format -r 2 -d -b /n/newfs/386/pbs -l PLAN9 $9fat
 	}
 	if not {
 		log Updating bootsector.

rc/bin/inst/partdisk

@@ -32,24 +32,26 @@ case go
 	prompt $default 'Disk to partition' $disks
 	disk=$rd
 
-	if(! ./hasmbr /dev/$disk/data) {
-		echo 'The disk you selected HAS NO master boot record on its first sector.'
-		echo '(Perhaps it is a completely blank disk.)'
-		echo 'You need a master boot record to use the disk.'
-		echo 'Should we install a default master boot record?'
-		echo
-		prompt 'Install mbr' y n
-		switch($rd) {
-		case y
-			disk/mbr -m /386/mbr /dev/$disk/data
-			pickdisk=done
-		}
-	}
-
 	diskedit=disk/fdisk
 	if(disk/edisk -p /dev/$disk/data >/dev/null >[2=1])
 		diskedit=disk/edisk
 
+	if(~ $diskedit disk/fdisk && ! ./hasmbr /dev/$disk/data) {
+		echo 'The disk you selected HAS NO master boot record on its first sector.'
+		echo '(Perhaps it is a completely blank disk.)'
+		echo 'Shall we create a blank EFI partition table (GPT)'
+		echo 'or install traditional DOS partition table (MBR)?'
+		echo
+		prompt 'Install mbr or gpt' mbr gpt
+		switch($rd) {
+		case mbr
+			disk/mbr -m /386/mbr /dev/$disk/data
+		case gpt
+			disk/edisk -bw /dev/$disk/data
+			diskedit=disk/edisk
+		}
+	}
+
 	echo
 	echo 'This is '$diskedit'; use it to create a Plan 9 partition.'
 	echo 'If there is enough room, a Plan 9 partition will be'