PSPLASH_FIFO_DIR: refactor

Add an entry for the psplash fifo directory to /etc/default/rcS and have the
pieces of code that need it source it from there rather than duplicating the
definition in multiple places throughout the code.

(From OE-Core rev: dc4065b6f101e6418301e0cb8d73ae3a1b2bdfb2)

Signed-off-by: Trevor Woerner <twoerner@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/psplash/files/psplash-init

@@ -7,6 +7,9 @@
 # Default-Stop:
 ### END INIT INFO
 
+. /etc/default/rcS
+export PSPLASH_FIFO_DIR
+
 if [ ! -e /dev/fb0 ]; then
     echo "Framebuffer /dev/fb0 not detected"
     echo "Boot splashscreen disabled"
@@ -23,7 +26,6 @@ for x in $CMDLINE; do
         esac
 done
 
-export PSPLASH_FIFO_DIR=/mnt/.psplash
 [ -d $PSPLASH_FIFO_DIR ] || mkdir -p $PSPLASH_FIFO_DIR
 if ! mountpoint -q $PSPLASH_FIFO_DIR; then
 	mount tmpfs -t tmpfs $PSPLASH_FIFO_DIR -o,size=40k

meta/recipes-core/sysvinit/sysvinit/rc

@@ -17,6 +17,7 @@
 
 . /etc/default/rcS
 export VERBOSE
+export PSPLASH_FIFO_DIR
 
 startup_progress() {
     step=$(($step + $step_change))
@@ -27,7 +28,7 @@ startup_progress() {
     fi
     #echo "PROGRESS is $progress $runlevel $first_step + ($step of $num_steps) $step_change $progress_size"
     if type psplash-write >/dev/null 2>&1; then
-        PSPLASH_FIFO_DIR=/mnt/.psplash psplash-write "PROGRESS $progress" || true
+        psplash-write "PROGRESS $progress" || true
     fi
 }
 
@@ -173,7 +174,7 @@ startup() {
 #Uncomment to cause psplash to exit manually, otherwise it exits when it sees a VC switch
 if [ "x$runlevel" != "xS" ] && [ ! -x /etc/rc${runlevel}.d/S??xserver-nodm ]; then
     if type psplash-write >/dev/null 2>&1; then
-        PSPLASH_FIFO_DIR=/mnt/.psplash psplash-write "QUIT" || true
+        psplash-write "QUIT" || true
     	umount -l /mnt/.psplash
     fi
 fi

meta/recipes-core/sysvinit/sysvinit/rcS-default

@@ -30,3 +30,5 @@ ROOTFS_READ_ONLY=no
 # rcS is also used when using busybox init and shares initscripts, some initscripts
 # need to have specific behavior depending on init system
 INIT_SYSTEM=sysvinit
+# set the psplash fifo directory
+PSPLASH_FIFO_DIR=/mnt/.psplash