[gnome-continuous-yocto/gnomeostree-3.28-rocko: 1887/8267] init-install*: /etc/mtab make a link rather than a copy

[Emmanuele Bassi <ebassi src gnome org>]

commit 92f505b0162f666b14208e2835c7def9f2cd4f2c
Author: Awais Belal <awais_belal mentor com>
Date:   Mon Aug 1 16:31:43 2016 +0500

    init-install*: /etc/mtab make a link rather than a copy
    
    Using a copy would only make management of devices erroneous
    and makes the system unstable in some scenarios as tools will
    have to manipulate both files separately. A link ensures that
    both files /proc/mounts and /etc/mtab will have the same
    information at all times and this is how it is handled
    on newer systems where there is such a need. Same is
    suggested by busybox.
    
    (From OE-Core rev: 9f9240d175acee274c04242fd5781094b3f5491b)
    
    Signed-off-by: Awais Belal <awais_belal mentor com>
    Signed-off-by: Ross Burton <ross burton intel com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 .../initrdscripts/files/init-install-efi.sh        |    4 ++--
 .../initrdscripts/files/init-install.sh            |    4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/meta/recipes-core/initrdscripts/files/init-install-efi.sh 
b/meta/recipes-core/initrdscripts/files/init-install-efi.sh
index 3134486..2d20a6d 100644
--- a/meta/recipes-core/initrdscripts/files/init-install-efi.sh
+++ b/meta/recipes-core/initrdscripts/files/init-install-efi.sh
@@ -128,8 +128,8 @@ umount ${device}* 2> /dev/null || /bin/true
 mkdir -p /tmp
 
 # Create /etc/mtab if not present
-if [ ! -e /etc/mtab ]; then
-    cat /proc/mounts > /etc/mtab
+if [ ! -e /etc/mtab ] && [ -e /proc/mounts ]; then
+    ln -sf /proc/mounts /etc/mtab
 fi
 
 disk_size=$(parted ${device} unit mb print | grep '^Disk .*: .*MB' | cut -d" " -f 3 | sed -e "s/MB//")
diff --git a/meta/recipes-core/initrdscripts/files/init-install.sh 
b/meta/recipes-core/initrdscripts/files/init-install.sh
index 0542e26..89d5a5d 100644
--- a/meta/recipes-core/initrdscripts/files/init-install.sh
+++ b/meta/recipes-core/initrdscripts/files/init-install.sh
@@ -124,8 +124,8 @@ if [ ! -b /dev/loop0 ] ; then
 fi
 
 mkdir -p /tmp
-if [ ! -L /etc/mtab ]; then
-    cat /proc/mounts > /etc/mtab
+if [ ! -L /etc/mtab ] && [ -e /proc/mounts ]; then
+    ln -sf /proc/mounts /etc/mtab
 fi
 
 disk_size=$(parted ${device} unit mb print | grep '^Disk .*: .*MB' | cut -d" " -f 3 | sed -e "s/MB//")