base-files: add /etc/shadow to list of essential files to keep in sysupgrade (bug...

Based on bug #18206 sysupgrade can lead to loss of password information in
certain situations. Most likely all users who will upgrade from versions
r43017-43040, will lose their current passwords. :-(
https://dev.openwrt.org/ticket/18206

Currently /etc/shadow is defined as a conffile in base-files:
https://dev.openwrt.org/browser/trunk/package/base-files/Makefile#L37

But it is not defined in the default list of essential files to keep in
sysupgrade:
https://dev.openwrt.org/browser/trunk/package/base-files/files/lib/upgrade/keep.d/base-files-essential

If exporting conffiles info fails, /etc/shadow can get lost.

Shadow passwords are now the default, so saying that preserving /etc/passwd
is essential while /etc/shadow is not, makes no sense.

The attached patch adds /etc/shadow to the list of essential files.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>
Backport of r43061

git-svn-id: svn://svn.openwrt.org/openwrt/branches/barrier_breaker@43062 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/base-files/files/lib/upgrade/keep.d/base-files-essential b/package/base-files/files/lib/upgrade/keep.d/base-files-essential
index 2c611d2..978d4b5 100644 (file)
--- a/package/base-files/files/lib/upgrade/keep.d/base-files-essential
+++ b/package/base-files/files/lib/upgrade/keep.d/base-files-essential
@@ -4,6 +4,7 @@
 /etc/group
 /etc/passwd
 /etc/profile
+/etc/shadow
 /etc/shells
 /etc/sysctl.conf
 /etc/rc.local