tools/testing/selftests/rcutorture/bin/config_override.sh

   1 #!/bin/bash
   2 #
   3 # config_override.sh base override
   4 #
   5 # Combines base and override, removing any Kconfig options from base
   6 # that conflict with any in override, concatenating what remains and
   7 # sending the result to standard output.
   8 #
   9 # This program is free software; you can redistribute it and/or modify
  10 # it under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation; either version 2 of the License, or
  12 # (at your option) any later version.
  13 #
  14 # This program is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 # GNU General Public License for more details.
  18 #
  19 # You should have received a copy of the GNU General Public License
  20 # along with this program; if not, you can access it online at
  21 # http://www.gnu.org/licenses/gpl-2.0.html.
  22 #
  23 # Copyright (C) IBM Corporation, 2017
  24 #
  25 # Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
  26
  27 base=$1
  28 if test -r $base
  29 then
  30         :
  31 else
  32         echo Base file $base unreadable!!!
  33         exit 1
  34 fi
  35
  36 override=$2
  37 if test -r $override
  38 then
  39         :
  40 else
  41         echo Override file $override unreadable!!!
  42         exit 1
  43 fi
  44
  45 T=${TMPDIR-/tmp}/config_override.sh.$$
  46 trap 'rm -rf $T' 0
  47 mkdir $T
  48
  49 sed < $override -e 's/^/grep -v "/' -e 's/=.*$/="/' |
  50         awk '
  51         {
  52                 if (last)
  53                         print last " |";
  54                 last = $0;
  55         }
  56         END {
  57                 if (last)
  58                         print last;
  59         }' > $T/script
  60 sh $T/script < $base
  61 cat $override