From 069b67461cc33d373d030b87744e11ea87fe927e Mon Sep 17 00:00:00 2001
From: Andrew Cady <d@jerkface.net>
Date: Wed, 21 Jun 2023 23:53:06 -0400
Subject: correct counting of btrfs filesystem devices

---
 src/initrd/btrfs-create.sh | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/initrd/btrfs-create.sh b/src/initrd/btrfs-create.sh
index 5a43977..efd8728 100644
--- a/src/initrd/btrfs-create.sh
+++ b/src/initrd/btrfs-create.sh
@@ -233,11 +233,14 @@ choose_uuid()
         uniq | sort -nr | head -n1 | (read _ x; echo $x)
 }
 
+num_devices()
+{
+    btrfs inspect-internal dump-super "$1" | sed -ne 's/^num_devices\t\t*//p'
+}
+
 filesystem_incomplete()
 {
-    local n
-    n=$(btrfs filesystem show "$1" | sed -ne 's/.*Total devices \([^ ]*\) .*/\1/p')
-    [ "$n" != 1 ]
+    [ "$(num_devices "$1")" != 1 ]
 }
 
 partition_new_hard_drive_DESTROYING_EVERYTHING()
@@ -276,8 +279,7 @@ open_samizdat()
   btrfs device scan -u || true
   if ! btrfs device scan || ! btrfs device ready "$blockdev"
   then
-      devcount=$(btrfs inspect-internal dump-super "$blockdev" | grep -c dev_item.devid)
-      if [ "$devcount" -eq 1 ]
+      if ! filesystem_incomplete "$blockdev"
       then
           btrfstune -m "$blockdev"
           btrfs device ready "$blockdev" || : get used to disappointment
-- 
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