oe-core/init-install.sh: do not overwrite /etc/mtab if the link already exist

Overwriting of /etc/mtab would fail as below if the /etc/mtab link already
exist during installation phase, this patch fix this problem by checking
existance of the link before try to overwrite it.

Error message during installation if the /etc/mtab exists:
"cat: /proc/mounts: input file is output file

Signed-off-by: Shan Hai <shan.hai@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>

diff --git a/meta/recipes-core/initrdscripts/files/init-install.sh b/meta/recipes-core/initrdscripts/files/init-install.sh
index f84a5eb83b66077c541c3d89bbf10737908169fd..0a1141a6f5d35110b1d5618221171372817d4d6f 100644 (file)
--- a/meta/recipes-core/initrdscripts/files/init-install.sh
+++ b/meta/recipes-core/initrdscripts/files/init-install.sh
@@ -90,7 +90,9 @@ if [ ! -b /dev/loop0 ] ; then
 fi
 
 mkdir -p /tmp
-cat /proc/mounts > /etc/mtab
+if [ ! -L /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//")