initscripts: populate-volatile: suppress read-only-rootfs warnings

From: André Draszik <[email protected]>

rm: can't remove '/etc/resolv.conf': Read-only file system
ln: /etc/resolv.conf: File exists

/etc/default/volatiles contains an entry:
l root root 0644 /etc/resolv.conf /var/run/resolv.conf

which causes populate-volatile.sh to execute the following in link_file():
if [ -L \"$2\" ]; then

    [ \"\$(readlink -f \"$2\")\" != \"\$(readlink -f \"$1\")\" ] && { rm -f \"$2\"; ln -sf \"$1\" \"$2\"; };
  elif [ -d \"$2\" ]; then
    ...

At the time the image is created, /etc/resolv.conf is already a symlink to /var/run/resolv.conf, but at boot time when populate-volatiles.sh is run, /var/run/resolv.conf doesn't exist, causing it to try to rm -f and ln -sf which of course fails due to the read-only filesystem.

[YOCTO #10814]

---
 meta/recipes-core/initscripts/initscripts-1.0/populate-volatile.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index ce4622a5e5..74e1e6e17c 100755
@@ -70,7 +70,7 @@ mk_dir() {
 link_file() {
 	EXEC="
 	if [ -L \"$2\" ]; then
-		[ \"\$(readlink -f \"$2\")\" != \"\$(readlink -f \"$1\")\" ] && { rm -f \"$2\"; ln -sf \"$1\" \"$2\"; };
+		[ \"\$(readlink -f \"$2\")\" != \"$1\" ] && { rm -f \"$2\"; ln -sf \"$1\" \"$2\"; };
 	elif [ -d \"$2\" ]; then
 		if awk '\$2 == \"$2\" {exit 1}' /proc/mounts; then
 			cp -a $2/* $1 2>/dev/null;

2.11.0