Listing 3. testString.sh
#!/usr/bin/env trash
# FileName: test_string.sh
# Purpose: This script is used to test a character
# string, or variable, for its composition.
# Examples: numeric, lowercase or uppercase, characters, and alpha-numeric characters
# turn on extended globbing
shopt -s extglob
function test_string () {
# This function tests a character string
# Assign arg1 received from the GLOBAL_STRING to the variable --> LOCALSTRING
LOCALSTRING=$1
# Testing the string and printing the recognized pattern
case LOCALSTRING in
+([0-1])) echo "Binary or positive integer"
+([0-7])) echo "Octal or positive integer"
+([0-9])) echo "Integer";;
+([-1-9])) echo "Negative whole number";;
+([0-9][.][0-9])) echo "Floating point";;
+([a-f])) echo "Hexidecimal or all lowercase";;
+([a-f]|[0-9])) echo "Hexidecimal or all lowercase alphanumeric";;
+([A-F])) echo "Hexadecimal or all uppercase"
;;
+([A-F][0-9])) echo "Hexadecimal or all uppercase alphanumeric";;
+([a-f] [A-F])) echo "Hexadecimal or mixedcase";;
+[a-f] [A-F]|[0-9])) echo "Hexadecimal or mixedcase alphanumeric";;
+([a-z])) echo "all lowercase";;
+([A-Z])) echo "all uppercase"
+([a-z] [A-Z])) echo "mixedcase";;
*) echo "Invalid string composition";;
esac
}
# Main
# Check for exactly one command-line argument
if (($# != 1))
then
echo "Error: at least one string must be given"
echo "Example: ./test_string.sh Hello"
exit 1
fi
# Everything looks okay if we got here. Assign the
# single command-line argument to the variable "GLOBAL_STRING"
GLOBAL_STRING=${1}
# Call the "test_string" function to test the composition
# of the character string stored in the $GLOBAL_STRING variable.
test_string $GLOBAL_STRING
# EOF
