Sponsored Content
Full Discussion: Trap key press in a script
Top Forums Shell Programming and Scripting Trap key press in a script Post 302182133 by era on Saturday 5th of April 2008 01:13:25 PM
Old 04-05-2008
Wow, that was a neat trick.

Code:
#!/bin/sh

echo here

while : ; do
  sleep 2
  echo still here
done &

main=$!
echo "# main is $main" >&2


# livinfree's neat dd trick from that other thread vino pointed out
tput smso
echo "Press any key to return \c"
tput rmso
oldstty=`stty -g`
stty -icanon -echo min 1 time 0
dd bs=1 count=1 >/dev/null 2>&1
stty "$oldstty"
echo

kill $main

 

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Read line with a single key press...

I would really like to have a script that will accept the key press from the user with out having to press the enter key afterwards. i.e. echo "Press Y to print \c" read YesNo At this point the user has to press the enter key to continue. Is there a way to accept the key press from the... (3 Replies)
Discussion started by: jagannatha
3 Replies

2. UNIX for Dummies Questions & Answers

Capture an empty key press...

I am trying to test input from the user, if they press enter with out an Y or N. I have the characheter thing sorted but when it comes to a blank or empty key press I am having trouble. if ; then clear echo "Sorry, that is an invalid choice!" exit fi I am using a KSH script in... (3 Replies)
Discussion started by: jagannatha
3 Replies

3. Shell Programming and Scripting

trap signal for enter key

hi , What is the trap signal for "ENTER key"? (4 Replies)
Discussion started by: Sreejith_VK
4 Replies

4. Shell Programming and Scripting

how to 'trap' the 'control+z' key

hello, I wanted to trap the signals in my shell script.We generally write it as:- By doing this I am able to trap ctrl+c.But when I hit "ctrl+z", then my shell is terminating....can you please tell me how to trap this signal.I wanna know the number corresponding to it !!! (3 Replies)
Discussion started by: nsharath
3 Replies

5. Shell Programming and Scripting

read -n1 -r -p "Press..." key / produces error in bash shell script

Hello! Sorry, for my not so perfect english! I want to stop bash shell script execution until any key is pressed. This line in a bash shell script read -n1 -r -p "Press any key to continue..." key produces this error When I run this from the command line usera@lynx:~$ read... (4 Replies)
Discussion started by: linuxinho
4 Replies

6. Shell Programming and Scripting

Any key press causing logout from shell

Hi all! I have written a shell script which will invoke perl script infinitly in the background in a loop. Code will do as:Within while loop, perl script will be run in background, get the pid and notify pid in though mail. then wait for pid to be completed before going for next iteration. I am... (1 Reply)
Discussion started by: jramesh1
1 Replies

7. Shell Programming and Scripting

Press Any Key script sequence using bash - HELP

hi to all. im a newbie in unix shell scripts. i want to make a simple unix shell script using the bash shell that asks a user to press any key after a series of commands, or an x if he wishes to exit. here's a sample script that i made: #!/usr/bin/bash pause(){ /usr/bin/echo "\t\t Press... (3 Replies)
Discussion started by: booghaw
3 Replies

8. Shell Programming and Scripting

How to detect key press in cgi shell script?

I want to detect key pressed in my .cgi web page, but it does not work even I found the code in other web site. My code is : #!/bin/sh #================================================= # PATH defination # ================================================... (2 Replies)
Discussion started by: Shuinvy
2 Replies

9. Shell Programming and Scripting

Run a command for specific amount of time with an auto key press

Hi, I have been trying to do a small fun project for myself. I want to run a command for 45 seconds. And to get the final output of this command, the script requires I push the "q" key on my keyboard and then the final output file becomes available. I tried the following script. But it... (12 Replies)
Discussion started by: jacobs.smith
12 Replies
echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME
echo - echo arguments to standard output SYNOPSIS
/usr/ucb/echo [-n] [argument] DESCRIPTION
echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output. echo is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi- ronment variables. For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows: o echo your current-working-directory's full pathname o pipe the output through tr to translate the path's embedded slash-characters into space-characters o pipe that output through wc -w for a count of the names in your path. example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w" See tr(1) and wc(1) for their functionality. The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be invoked if the user calls echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the black-slashed escape characters, and ksh's echo() also understands a as the audible bell character; however, these commands do not have an -n option. OPTIONS
-n Do not add the NEWLINE to the output. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5) NOTES
The -n option is a transition aid for BSD applications, and may not be supported in future releases. SunOS 5.10 3 Aug 1994 echo(1B)
All times are GMT -4. The time now is 08:04 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy