Select command help with blank input value


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Select command help with blank input value
Prev   Next
# 5  
Old 08-06-2013
What if something else is entered, i.e. not a number? Consider also a wildcard option for your case statement:-
Code:
case this in
   a) x=1 ;;
   b) x=2 ;;
   c) x=3 ;;
   *) echo "Invalid" ;;
esac

I thinks that select is working as designed. It is simple enough and work, but not that flexible, however I am very happy to use it. Perhaps you could allow any input and then work on the choice outside of the select loop, just calling it to display your menu.



Robin



Robin
 
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Select command

Hi I'm using the "select" command in the global_env.sh to log in to the application directory. This file is called in .bashrc profile. Sample code: Filename: global_env.sh set -o vi export severname=$(uname -n) printf '%s\n%30s\n%s\n' "***********************" "Welcome to $severname"... (6 Replies)
Discussion started by: cheers799
6 Replies

2. Shell Programming and Scripting

Help with 'select' for menu input

A lot of my scripting makes use of the 'select' command to create menu driven input. A typical example of how I use it is as: somevar='' PS3='Select one: ' while ]; do select somevar in $(sqlplus -s $dbuser/$dbpw@mydb <<EOF set echo off feedback off verify off... (7 Replies)
Discussion started by: edstevens
7 Replies

3. Shell Programming and Scripting

Script to select the rows from the feed file based on the input value provided

Hi Folks, I have the below feed file named abc1.txt in which you can see there is a title and below is the respective values in the rows and it is completely pipe delimited file ,. ... (3 Replies)
Discussion started by: punpun66
3 Replies

4. UNIX for Dummies Questions & Answers

Select Command - return

Hello everyone, A simple question which may have a suggested solution: I am using, and loving, the select command in a ksh93 script on AIX 6.1 to present users with menus. I have been successful in controlling all of key input by the users, I still have an issue with the RETURN key. When the... (4 Replies)
Discussion started by: gio001
4 Replies

5. Shell Programming and Scripting

PS3 select when wrong input given

Hi All I am using the below code to chose a file to view : PS3="Select file to view : " select FILE in `ls` QUIT do if ; then clear cat $FILE else break fi REPLY='' done Everything works fine as long as I am giving the correct choice . But when i give a... (4 Replies)
Discussion started by: ningy
4 Replies

6. Shell Programming and Scripting

how to test input variable is a string in a select loop

Okay -- I hope I ask this correctly. I'm working on my little shell script to write vendor names and aliases to files from user input. If a user choose to add to a file, he can do that as well. I'm using a select loop for this function to list all the possible files the user can choose from.... (7 Replies)
Discussion started by: Straitsfan
7 Replies

7. Shell Programming and Scripting

extract/select pattern from input

Hey, examples of the input (text line): /bla/blMOasdn234.adanif24/blabla.rar /bla/blMOasdn234.adanif24/blabla23124.bin /bla/bla/bla/bla/bla/bla.bin and what I need to do is extract/select only the dir path so the output would be: /bla/blMOasdn234.adanif24/ /bla/blMOasdn234.adanif24/... (4 Replies)
Discussion started by: TehOne
4 Replies

8. Shell Programming and Scripting

Validating user input is not blank

Trying to create a script in BASH that would ask the user to enter another user name making sure the input is not blank before they hit enter then to check the home directory of that user does exist, I have the check folder sorted it's just the loop to make sure the user has entered chars (5 Replies)
Discussion started by: MBN
5 Replies

9. Shell Programming and Scripting

Select command array

Hello everyone, I have a quick question about the select command in ksh. I am using it to define a menu for user selection, I have found that the REPLY var contains the input from the user, I was interested to find out if there is a system variable that contains the whole menu as an array, the... (2 Replies)
Discussion started by: gio001
2 Replies

10. Shell Programming and Scripting

select datas from an input file

I have a file containing a list of references and I want to run a script that will make the same action for each reference. The input file changes every hour, it's why I want to use a script that can read in a file, record by record, and run a specific action for the reference readed. Thanks... (1 Reply)
Discussion started by: dde
1 Replies
Login or Register to Ask a Question
select_wakeup(9r)														 select_wakeup(9r)

NAME
select_wakeup - General: Wakes up a kernel thread SYNOPSIS
void select_wakeup( sel_queue_t *selq ); ARGUMENTS
Specifies a pointer to a sel_queue structure. DESCRIPTION
The select_wakeup routine wakes up a kernel thread that is suspended while waiting for an event on the specified device. A user-level process can use the select system call to cause the process to be suspended while waiting for an event to happen on a device. For example, a graphics application may issue a select call while waiting for mouse or keyboard input to arrive. In this case the process would issue the select system call, which would indirectly call the graphics driver's select routine (through the driver's select entry point in the dsent table) to determine if any input is available. If input is available, the select call may return immediately. If no input is cur- rently available, the graphics driver would suspend the process until input arrived. For this example, when the graphics driver has received input (typically through its interrupt handler), it causes any processes suspended from calling select to continue by calling the select_wakeup routine. This causes any process currently suspended on the select channel (as specified by the selq argument) to resume. RETURN VALUES
None SEE ALSO
Routines: select_dequeue(9r), select_dequeue_all(9r), select_enqueue(9r) System Calls: select(2) select_wakeup(9r)