libcxx/utils/zos_rename_dll_side_deck.sh

   1 #!/usr/bin/env bash
   2 #
   3 # Script to rename DLL name within side deck.
   4 #
   5
   6 # Stops execution if a command or pipeline has an error.
   7 set -e
   8
   9 sidedeck=$1
  10 old_dll_name=$2
  11 new_dll_name=$3
  12
  13 function error() {
  14   printf "ERROR: %s\n" "$*"
  15   exit 1
  16 }
  17
  18 function usage() {
  19 cat <<EOF
  20 Usage: $(basename $0) <side deck file> <old dll name> <new dll name>:
  21           [-h|--help] Display this help and exit.
  22 EOF
  23 }
  24
  25 rename_dll_name_inside_side_deck() {
  26
  27 if [[ -z "$sidedeck" || -z "$old_dll_name" || -z "$new_dll_name" ]]; then
  28   usage
  29   error "All 3 parameters must be specified."
  30 fi
  31
  32 [[ -f "$sidedeck" ]] || error "The '$sidedeck' file must exists."
  33
  34 old_len=${#old_dll_name}
  35 new_len=${#new_dll_name}
  36
  37 if (( $new_len > $old_len )); then
  38   error "New DLL name $new_dll_name must have $old_len characters or less."
  39 fi
  40
  41 if ((padding_len=$old_len-$new_len )); then
  42   pad=$(printf "%*s" $padding_len "")
  43 fi
  44
  45 # Touch the temp. file and set the tag to 1047 first so the redirecting statement
  46 # will write in 1047 and not 819 encoding.
  47 touch $sidedeck.tmp; chtag -tc1047 $sidedeck.tmp
  48 sed "/ IMPORT /s/'$old_dll_name/$pad'$new_dll_name/g" $sidedeck > $sidedeck.tmp
  49 mv $sidedeck.tmp $sidedeck
  50 }
  51
  52 function main() {
  53   rename_dll_name_inside_side_deck
  54 }
  55
  56 main "$@"
  57