[PATCH openbmc v6 16/18] initfs: update: handle no images to update

[OpenBMC Patches]

From: Milton Miller <miltonm at us.ibm.com>

Notify the user if image wildcard expansion fails instead of printing
message about failing to find partition to flash.

The update script errors with the message that it can't figure out what
partition to flash for /run/initramfs/image-* if there are no images
pending.

Signed-off-by: Milton Miller <miltonm at us.ibm.com>
---
 .../obmc-phosphor-initfs/files/obmc-update.sh               | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/meta-phosphor/common/recipes-phosphor/obmc-phosphor-initfs/files/obmc-update.sh b/meta-phosphor/common/recipes-phosphor/obmc-phosphor-initfs/files/obmc-update.sh
index 1dbf65f..7120a18 100755
--- a/meta-phosphor/common/recipes-phosphor/obmc-phosphor-initfs/files/obmc-update.sh
+++ b/meta-phosphor/common/recipes-phosphor/obmc-phosphor-initfs/files/obmc-update.sh
@@ -99,6 +99,7 @@ checkmount=y
 whitelist=/run/initramfs/whitelist
 image=/run/initramfs/image-
 E="ERROR:"
+imglist=
 
 while test "$1" != "${1#-}"
 do
@@ -184,7 +185,15 @@ then
 	fi
 fi
 
-for f in $image*
+imglist=$(echo $image*)
+if test "$imglist" = "$image*" -a ! -e "$imglist"
+then
+	# shell didn't expand the wildcard, so no files exist
+	echo "No images found to update."
+	imglist=
+fi
+
+for f in $imglist
 do
 	m=$(findmtd ${f#$image})
 	if test -z "$m"
@@ -209,7 +218,7 @@ done
 
 if test -n "$doflash"
 then
-	for f in $image*
+	for f in $imglist
 	do
 		if test ! -s $f
 		then
-- 
2.9.0