base-files: merge /etc/passwd et al at sysupgrade config restore

[openwrt/openwrt.git] / package / base-files / files / lib / preinit / 80_mount_root

diff --git a/package/base-files/files/lib/preinit/80_mount_root b/package/base-files/files/lib/preinit/80_mount_root
index 265a3f18df49043824a6d70609e6c95dc017496a..56d3fa379743efe6b494a7b15a7a45f3b93caa99 100644 (file)
--- a/package/base-files/files/lib/preinit/80_mount_root
+++ b/package/base-files/files/lib/preinit/80_mount_root
@@ -2,6 +2,19 @@
 # Copyright (C) 2006 OpenWrt.org
 # Copyright (C) 2010 Vertical Communications
 
+missing_lines() {
+       local file1 file2 line
+       file1="$1"
+       file2="$2"
+       oIFS="$IFS"
+       IFS=":"
+       while read line; do
+               set -- $line
+               grep -q "^$1:" "$file2" || echo "$*"
+       done < "$file1"
+       IFS="$oIFS"
+}
+
 do_mount_root() {
        mount_root
        boot_run_hook preinit_mount_root
@@ -9,6 +22,9 @@ do_mount_root() {
                echo "- config restore -"
                cd /
                tar xzf /sysupgrade.tgz
+               missing_lines /rom/etc/passwd /etc/passwd >> /etc/passwd
+               missing_lines /rom/etc/group /etc/group >> /etc/group
+               missing_lines /rom/etc/shadow /etc/shadow >> /etc/shadow
                # Prevent configuration corruption on a power loss
                sync
        }