openwrt/package/base-files/default/bin/login

   1 #!/bin/sh
   2 grep '^root:[^!]' /etc/passwd >&- 2>&-
   3 [ "$?" = "0" -a -z "$FAILSAFE" ]  &&
   4 {
   5     echo "Login failed."
   6     exit 0
   7 } || {
   8 cat << EOF
   9  === IMPORTANT ============================
  10   Use 'passwd' to set your login password
  11   this will disable telnet and enable SSH
  12  ------------------------------------------
  13 EOF
  14 }
  15
  16 exec /bin/ash --login