Полезная информация

UNIX in a Nutshell: System V Edition

UNIX in a Nutshell: System V EditionSearch this book
Previous: Reference: returnChapter 4
The Bourne Shell and Korn Shell
Next: Reference: set


select x [in list]

Korn shell only. Display a list of menu items on standard error, numbered in the order they are specified in list. If no list is given, items are read from the command line (via "$@"). Following the menu is a prompt string (set by PS3). At the PS3 prompt, users select a menu item by typing its line number, or they redisplay the menu by typing RETURN. (User input is stored in the environment variable REPLY.) If a valid line number is typed, commands are executed.


PS3="Select the item number:"
select event in Format Page View Exit
   case "$event" in
     Format) nroff $file | lp;;
     Page)   pr $file | lp;;
     View)   cat $file
     Exit)   exit 0;;
     *   )   echo "Invalid selection";;

The output of this script would look like this:

1. Format
2. Page
3. View
4. Exit
Select the item number:

Previous: Reference: returnUNIX in a Nutshell: System V EditionNext: Reference: set
Reference: returnBook IndexReference: set

The UNIX CD Bookshelf NavigationThe UNIX CD BookshelfUNIX Power ToolsUNIX in a NutshellLearning the vi Editorsed & awkLearning the Korn ShellLearning the UNIX Operating System