Wait given time unless key pressed


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Wait given time unless key pressed
# 1  
Old 02-15-2010
Wait given time unless key pressed

Hello everyone.
I'm trying to create a script that waits a given amount of time unless a given key is pressed. I found a very useful thread here

https://www.unix.com/shell-programmin...ss-script.html

however, I cannot figure out a way of avoiding the keypress if the countdown hits zero. is this possible?

Thanks in advance.
# 2  
Old 02-15-2010
If you are coding in bash -
Code:
 read -t 10 myvariable

This times out and continues after 10 seconds.
# 3  
Old 02-15-2010
I'm using the original bourne shell. I'd prefer it if the key were a single custom key like the dd trick provides, but I guess I can just make that key the return key and use read with a timeout if I can't think of a way to do that. Thank you.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

[Solved] Help with shell Script ,wait for some files for some time??

Hi All, I have the requirement that ,i have to write a shell script that job has to wait for a 7 touch files created by another application for 4 hours, if i get all 7 touch files ,i have to send a mail that i jobs are completed, if if it is waiting for more than 4 hours i have to send a mail... (2 Replies)
Discussion started by: Pradeep Shetty
2 Replies

2. Shell Programming and Scripting

how can i know the pressed key is arrowup?

Hi all, I need to know how to test a pressed key is arrowup or arrowdown and etc.. I found that the "echo" won't print anything if i enter the arrowup in the below code: read echo "you pressed $REPLY" Then i find a way to achieve my goal. 1 #! /bin/bash 2 3 ARROWUP='\;then... (4 Replies)
Discussion started by: homeboy
4 Replies

3. Shell Programming and Scripting

Disable Enter key to be pressed

Hi Experts, I have a script in which I want to disable the "Enter" key press. Actually my script executes some process in background. So, till that background process is running, I don't want "Enter" key to be pressed by user. Is this can be achieved using trap command? (6 Replies)
Discussion started by: R0H0N
6 Replies

4. UNIX for Dummies Questions & Answers

screen blinks when escape key is pressed

hi folks, i am using sun solaris, when i press escape key in putty/netterm screen will blink for a second, plese let me know where this setting is done by my admin, what i feel is my admin must have set some control key for this so that screen will refresh each time i press escape key. please let... (1 Reply)
Discussion started by: sudheer157
1 Replies

5. Shell Programming and Scripting

date and time on every time pressing return key

Hi all, I have a situation here, I want that every time when i press "enter key" in bash prompt i want the date command to be executed. i have tried to make some changes in "/etc/bashrc" but no luck. Thanx in advance (1 Reply)
Discussion started by: xander
1 Replies

6. Solaris

Process wait time

Hi all, I am trying to find out the process wait time on Unix(AIX/SOLARIS) machine( only sh/ksh/csh): Like EXAMPLE 1 : $ vmstat 2 System configuration: lcpu=16 mem=32000MB kthr memory page faults cpu ----- -----------... (1 Reply)
Discussion started by: chandrakala.sg
1 Replies

7. Shell Programming and Scripting

How to identify whether the return key is pressed ??

I want my program(ksh) to execute further only if the return key is pressed. Please help. i have already tried "\n", "\r", "^M" . Thanks in advance (2 Replies)
Discussion started by: AiK
2 Replies

8. Programming

know what key is pressed

hi i´m making a program, and i would like to know how can i know what key was pressed. i'm using Sun5.7 and C. is there a keypress/keypressed function in C? how can i know recognize the keys (enter, tab, shift, etc.)? can i recognize two keys ? (shift+A, ctrl+C, etc) any idea.. thanks (4 Replies)
Discussion started by: DebianJ
4 Replies

9. Solaris

Time Wait interval

What is the time_wait interval for Solaris 8/9??? and is it configurable??? For example sometimes a clients pc will freeze up dropping the connection, closing the port. The problem is on our side our system still thinks their logged in (until it realizes it dropped on the otherside and drops on... (1 Reply)
Discussion started by: eloquent99
1 Replies

10. UNIX for Dummies Questions & Answers

default time in Solaris 8 for time-wait

Ok, heres the situation. We use Solaris 8 and sometimes users who are logged into our system restart their pc's without shutting down the application that attached to our unix backend. I netstat and I get time-waits for the users. My question is how long before the time-wait ends and the user... (1 Reply)
Discussion started by: eloquent99
1 Replies
Login or Register to Ask a Question