#!/bin/bash # Testing ranges of characters. echo; echo "Hit a key, then hit return." read Keypress case "$Keypress" in [[:lower:]] ) echo "Lowercase letter";; [[:upper:]] ) echo "Uppercase letter";; [0-9] ) echo "Digit";; * ) echo "Punctuation, whitespace, or other";; esac # Allows ranges of characters in [square brackets], #+ or POSIX ranges in [[double square brackets. # In the first version of this example, #+ the tests for lowercase and uppercase characters were #+ [a-z] and [A-Z]. # This no longer works in certain locales and/or Linux distros. # POSIX is more portable. # Thanks to Frank Wang for pointing this out. # Exercise: # -------- # As the script stands, it accepts a single keystroke, then terminates. # Change the script so it accepts repeated input, #+ reports on each keystroke, and terminates only when "X" is hit. # Hint: enclose everything in a "while" loop. exit 0
#!/bin/bash # Crude address database clear # Clear the screen. echo " Contact List" echo " ------- ----" echo "Choose one of the following persons:" echo echo "[E]vans, Roland" echo "[J]ones, Mildred" echo "[S]mith, Julie" echo "[Z]ane, Morris" echo read person case "$person" in # Note variable is quoted. "E" | "e" ) # Accept upper or lowercase input. echo echo "Roland Evans" echo "4321 Flash Dr." echo "Hardscrabble, CO 80753" echo "(303) 734-9874" echo "(303) 734-9892 fax" echo "revans@zzy.net" echo "Business partner & old friend" ;; # Note double semicolon to terminate each option. "J" | "j" ) echo echo "Mildred Jones" echo "249 E. 7th St., Apt. 19" echo "New York, NY 10009" echo "(212) 533-2814" echo "(212) 533-9972 fax" echo "milliej@loisaida.com" echo "Ex-girlfriend" echo "Birthday: Feb. 11" ;; # Add info for Smith & Zane later. * ) # Default option. # Empty input (hitting RETURN) fits here, too. echo echo "Not yet in database." ;; esac echo # Exercise: # -------- # Change the script so it accepts multiple inputs, #+ instead of terminating after displaying just one address. exit 0