Calling All Script Guru's

Shinobi · 04-02-2003, 02:32 PM

First I guess I should ask where the best place to ask script questions is. Anyone have any links?

Now the questions:

What I'm trying to configure is a script that takes an (random string) argument ( $1 ) and first determines if it is all upper case or lower case.

If possible I would like to also do this: If it is a mixture I would like to convert it to either all upper case or lower case. If not possible an exit and

echo "argument must be either all upper or lower case"

would suffice.

Next, later in the script, I need to convert that argument to it's alternative (all upper to lower, or vice versa)

Please do this in #!/bin/sh

Thanks!!!!

bentz · 04-02-2003, 02:54 PM

Use something like this:

echo "blah BLAH BLaH" | tr [:upper:] [:lower:]
Output: "blah blah blah"

or

echo "blah BLAH BLaH" | tr [:lower:] [:upper:]
Output: BLAH BLAH BLAH

david_ross · 04-02-2003, 02:55 PM

I was about to say the same:
echo $1 | tr '[a-z]' '[A-Z]'

I've never seen a way to check the case directly but you could convert it one way and see if it is the same before and after the conversion.

david_ross · 04-02-2003, 03:09 PM

Here is a very simple example

Code:

#!/bin/sh

BEFORE=$1
UPPER=`echo $1 | tr '[a-z]' '[A-Z]'`
LOWER=`echo $1 | tr '[A-Z]' '[a-z]'`

if [ $BEFORE == $UPPER ]; then
echo The test entered was UPPERCASE

        else
        if [ $BEFORE == $LOWER ]; then
        echo The test entered was LOWERCASE

                else
                echo The test entered was of MIXED case

        fi
fi

Shinobi · 04-02-2003, 03:18 PM

Dave, you're the man! Thanks !

I'll see if I can tweak it to adjust the mixed case.

EDIT: Just realized that mixed cases are automatically translated by the tr anyways . So in the end all that remains is UPPER and LOWER. -- less headache!

Thanks again!

unSpawn · 04-02-2003, 03:24 PM

I've never seen a way to check the case directly
How about

capCharS=ABCDEFGHIJKLMNOPQRSTUVWXYZ
expr index $@ ${capChars} >/dev/null
case $? in 0) printf "%s$@ has caps.\n";; esac

You could "echo $@ | grep -qe '[A-Z]'" but that's no fun doing input validation.