[PATCH v2] upgrade.html: Rename uploaded firmware before sysupgrade

[Adrian Schmutzler]

At the moment sysupgrade via WebUI is broken on many devices.
This is reproducible: While the (few) status messages seem
normal, the device boots again with the old firmware.
Sysupgrade via SSH always works.

The sysupgrade call in upgrade.html directly uses the path of
the uploaded firmware file as argument. From several tests and
based on caught stdout/stderr from this line, it looks like haserl
deletes the uploaded firmware file due to a hidden trigger before
or even while it is processed by sysupgrade.

The easiest way to work around that is to just rename the file
before using it as argument to sysupgrade. This will preserve the
file DURING sysupgrade. If sysupgrade fails explicitly (status
code != 0), remove the file to provide sufficient memory for
another upload.

Signed-off-by: Adrian Schmutzler <freifunk at adrianschmutzler.de>

---

Changes in v2:
- Remove file on exit-code != 0
- Adjust commit message to that change
---
 src/packages/fff/fff-web/Makefile                           | 2 +-
 src/packages/fff/fff-web/files/www/ssl/cgi-bin/upgrade.html | 5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/packages/fff/fff-web/Makefile b/src/packages/fff/fff-web/Makefile
index 9bb10f71..819644a5 100644
--- a/src/packages/fff/fff-web/Makefile
+++ b/src/packages/fff/fff-web/Makefile
@@ -1,7 +1,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=fff-web
-PKG_RELEASE:=7
+PKG_RELEASE:=8
 
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)
 
diff --git a/src/packages/fff/fff-web/files/www/ssl/cgi-bin/upgrade.html b/src/packages/fff/fff-web/files/www/ssl/cgi-bin/upgrade.html
index 96199c22..e2b0a57f 100755
--- a/src/packages/fff/fff-web/files/www/ssl/cgi-bin/upgrade.html
+++ b/src/packages/fff/fff-web/files/www/ssl/cgi-bin/upgrade.html
@@ -72,8 +72,9 @@ elif [ "$do_sysupgrade" = "1" ] ; then
 	echo "<pre>"
 	echo "# Freeing caches ..."
 	echo 3 > /proc/sys/vm/drop_caches
-	echo "# sysupgrade $args $HASERL_firmware_path"
-	sysupgrade $args $HASERL_firmware_path
+	echo "# sysupgrade $args /tmp/uploadedfw.bin"
+	mv -f "$HASERL_firmware_path" /tmp/uploadedfw.bin
+	sysupgrade $args /tmp/uploadedfw.bin || rm /tmp/uploadedfw.bin
 	echo "</pre>"
 fi
 %>
-- 
2.11.0