init-install-efi.sh: Avoid /mnt/mtab creation if already present

The base-files recipe installs /mnt/mtab (it is a softlink of /proc/mounts),
so if an image includes the latter, there is no new to created it again inside
the install-efi.sh script, otherwise an error may occur as indicated on the
bug's site.

[YOCTO #7971]

(From OE-Core rev: 1679c3d7bfa1cff4e126e2ed3dff50bdd7c2eeab)

Signed-off-by: Leonardo Sandoval <leonardo.sandoval.gonzalez@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/meta/recipes-core/initrdscripts/files/init-install-efi.sh b/meta/recipes-core/initrdscripts/files/init-install-efi.sh
index 329586d74d..03c2a96c66 100644
--- a/meta/recipes-core/initrdscripts/files/init-install-efi.sh
+++ b/meta/recipes-core/initrdscripts/files/init-install-efi.sh
@@ -97,7 +97,11 @@ rm -f /etc/udev/scripts/mount*
 umount /dev/${device}* 2> /dev/null || /bin/true
 
 mkdir -p /tmp
-cat /proc/mounts > /etc/mtab
+
+# Create /etc/mtab if not present
+if [ ! -e /etc/mtab ]; then
+    cat /proc/mounts > /etc/mtab
+fi
 
 disk_size=$(parted /dev/${device} unit mb print | grep Disk | cut -d" " -f 3 | sed -e "s/MB//")