[archiso] Use different logic when archisodevice == cow_device

* Now bootmnt/img_dev is always a ro-mount,
  and cowspace is first ro-mount then rw-mount.

* Fix a "hidden" bug: at the time of test [[ -ef ]], if devices nodes
  are not ready, such test will fail then archisodevice will mounted ro and
  when cow_device is mounted to be rw it fails.
  (I recently suffered this on a machine with slow USB)

Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>

1 files changed, 3 insertions, 0 deletions

diff --git a/archiso/install/archiso b/archiso/install/archiso
index 0bb0d0f..7984c53 100644
--- a/archiso/install/archiso
+++ b/archiso/install/archiso
@@ -14,6 +14,9 @@ build ()
     add_file /lib/udev/rules.d/95-dm-notify.rules
     add_file /lib/initcpio/udev/11-dm-initramfs.rules /lib/udev/rules.d/11-dm-initramfs.rules
 
+    # Add an empty fstab to avoid mount warning when -o remount is used (this should go to install/base)
+    : > "$BUILDROOT/etc/fstab"
+
     SCRIPT="archiso"
 }