Shell Programming and Scripting

input="data.txt"
while IFS= read -r var
do
startdirectory=$loc
search=$(echo $var | awk -F'=' '{print $1}')
replace=$(echo $var | awk -F'=' '{print $2}')
find "/tmp/config" -type f -exec grep -l "$search" {} + |
while read file
do if sed -e "s#$search#$replace#g" "$file" > /tmp/tmpfile.tmp
then mv /tmp/tmpfile.tmp "$file"
echo $file
printf "Modified: %s\n" "$file"
fi
done
rm -f /tmp/tmpfile.tmp
done < "$input"

sed -n 's/..*=.*/s=&=g/p' < data.txt > data.sed

...
while read file
do
  sed -f data.sed "$file" > "$file"_tmp.replace
done

find /tmp/config -type f -exec grep -lE "(white|red|blue)[^=]" {} + |  awk '
FNR == 1        {FC++
                }
FC == 1         {ARGV[ARGC++] = $1
                 next
                }
FC == 2         {RP[$1] = $2
                 next
                }
FNR == 1        {NFN = FILENAME ".tmp.replace"
                }
                {for (r in RP) gsub (r, RP[r])
                 print > NFN     
                }
' - FS="=" data.txt

sed -f data.sed "$file" > "$file"_tmp.replace

sed -n 's/..*=.*/s=&=g/p' < data.txt > data.sed
sed -n 's/=.*//p' < data.txt > data.grep

find "/tmp/config" -type f -print |
while read file
do
  if grep -f data.grep "$file" >/dev/null
  then
    sed -f data.sed "$file" > "$file"_tmp.replace
  fi
done

awk '
NR == FNR       {if (NR == 1) ARGV[ARGC++] = XFN = FILENAME
                 RP[$1] = $2
                 next
                }
!L              {for (r in RP) P = P "|" r
                 P = "(" substr (P, 2) ")"
                 cmd = "find /tmp/config -type f -exec grep -lE \"" P "[^=]\" {} + "
                 while (cmd | getline X) ARGV[ARGC++] = X
                 L = 1
                }

FNR == 1        {NFN = FILENAME ".tmp.replace"
                 AFN = FILENAME
                }

AFN == XFN      {next}

                {for (r in RP) gsub (r, RP[r])
                 print >  NFN
                }
' FS="=" data.txt