Shell Programming and Scripting

function validateInput {
 input=$1
 allowedInput=$2
 
 for allowedOption in ${allowedInput}
 do
  if [ ${input} -eq ${allowedOption} ]
  then
   return 0
  fi
 done
 
 return 1
}

validateInputs(){

 inputs=$1
 allowedInput=$2
 min_args=$3
 max_args=$4
 arg_ct=0
 inval_args=""

 for input in $inputs qzzq
 do
  if [ $input = qzzq ]
  then
   break
  fi

  for allowedOption in ${allowedInput}
  do
   if [ ${input} -eq ${allowedOption} ]
   then
    inval_args="$inval_args $input"
   fi
  done
  (( $arg_ct += 1 ))
 done

 if [ "$inval_args" != "" ]
 then
  echo "Invalid:$inval_args" >/dev/tty
  return 1
 fi

 if (( $arg_ct > $max_args || $arg_ct < $min_args ))
 then
  return 2
 fi

 return 0
}

$
$
$ cat -n f38
     1  #!/usr/bin/bash
     2  x=$1
     3  y=$2
     4  i=0
     5  while [ $i -lt ${#x} ]; do
     6    d=${x:$i:1}
     7    if ! [[ " $y " =~ " $d " ]]
     8    then
     9      echo "$d does not exist in $y"
    10      return 1
    11    fi
    12    i=`expr $i + 1`
    13  done
    14  echo "$x exists in $y"
    15  return 0
$
$
$ . f38 "1" "1 2 3 4"
1 exists in 1 2 3 4
$
$
$ . f38 "123" "1 2 3 4"
123 exists in 1 2 3 4
$
$
$ . f38 "0123" "1 2 3 4"
0 does not exist in 1 2 3 4
$
$
$ . f38 "1236" "1 2 3 4"
6 does not exist in 1 2 3 4
$
$
$ . f38 "1237" "1 2 3 77 4"
7 does not exist in 1 2 3 77 4
$
$

validateInput() {
  input=$1 allowedInput=$2
  while [ -n "$input" ]; do
  c=${input%${input#?}} input=${input#$c}
    case $allowedInput in
      ( *$c* )          ;;
      (   *  ) return 1 ;;
    esac
  done
  }

#!/usr/bin/ksh

valInp(){

for i in $1 qzzq
do
 bad_args=""

 case "$i"  in
 (qzzq)
   ;;
 ($2)
   ;;
 (*)
   bad_args="$bad_args $i"
   ;;
 esac
done

if [ "$bad_args" != "" ]
then
 return 1
fi
}

#!/usr/bin/ksh

valInp(){

bad_args=""

echo $1 | tr ' ' '\12' | grep -Ev "$2" | while read bad
do
 bad_args="$bad_args $bad"
done

if [ "$bad_args" != "" ]
then
 return 1
fi
}