Shell Programming and Scripting

for i in `cat BASE.txt`
do
if XK $i | grep BASE
then cat $i >> output.txt
done

for i in `cat BASE.txt`
do
if XK $i | grep BASE
then cat $i >> output.txt
fi
done

NEXT LINE IN BASE.txt ACTION     RESULT            ACTION
abcd                  XK abcd    BASE not found    append to output.txt
defg                  XK defg    defg present      none
hijk                  XK hijk    BASE not found    append to output.txt
lmno                  XK lmno    lmno present      none
pqrs                  XK pqrs    pqrs present      none
tuvw                  XK tuvw    BASE not found    append to output.txt

#!/bin/ksh

# define constant variables.  If a file name ever has to change, you'll have
# to change it here only.
typeset -r INPUTFILE=BASE.txt
typeset -r OUTPUTFILE=output.txt
typeset -r MATCH_TEXT=BASE

# Create or zero out the OUTPUTFILE if it already exists.
> $OUTPUTFILE

# Read INPUTFILE a line at a time.  The line read goes into the variable "line".
while read line
do
  # Call XK passing the line read in and save the output in xk_out.
  xk_out=$(XK $line)

  # If the first 4 characters of the output = $MATCH_TEXT, append the entire line read to
  # OUTPUTFILE.
  if [[ ${xk_out:0:4} == $MATCH_TEXT ]]; then
    print $line >> $OUTPUTFILE
  fi
done < $INPUTFILE

exit 0

while read i
do
  if XK $i | grep BASE
  then
    echo $i >> output.txt
  fi
done < BASE.txt