package/base-files/files/lib/preinit/80_mount_root

   1 # Copyright (C) 2006 OpenWrt.org
   2 # Copyright (C) 2010 Vertical Communications
   3
   4 missing_lines() {
   5         local file1 file2 line
   6         file1="$1"
   7         file2="$2"
   8         oIFS="$IFS"
   9         IFS=":"
  10         while read line; do
  11                 set -- $line
  12                 grep -q "^$1:" "$file2" || echo "$*"
  13         done < "$file1"
  14         IFS="$oIFS"
  15 }
  16
  17 do_mount_root() {
  18         mount_root
  19         boot_run_hook preinit_mount_root
  20         [ -f /sysupgrade.tgz -o -f /tmp/sysupgrade.tar ] && {
  21                 echo "- config restore -"
  22                 cp /etc/passwd /etc/group /etc/shadow /tmp
  23                 cd /
  24                 [ -f /sysupgrade.tgz ] && tar xzf /sysupgrade.tgz
  25                 [ -f /tmp/sysupgrade.tar ] && tar xf /tmp/sysupgrade.tar
  26                 missing_lines /tmp/passwd /etc/passwd >> /etc/passwd
  27                 missing_lines /tmp/group /etc/group >> /etc/group
  28                 missing_lines /tmp/shadow /etc/shadow >> /etc/shadow
  29                 rm /tmp/passwd /tmp/group /tmp/shadow
  30                 # Prevent configuration corruption on a power loss
  31                 sync
  32         }
  33 }
  34
  35 [ "$INITRAMFS" = "1" ] || boot_hook_add preinit_main do_mount_root