Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Read input while another command is running &&
Top Forums Shell Programming and Scripting Read input while another command is running && Post 302901787 by Kiah07 on Thursday 15th of May 2014 03:26:26 PM
Old 05-15-2014
Hey guys, no it's not the entire script and I needed many other keys. This was just the quickest and easiest way to show the problem area. I solved it by running tshark in the background, and had to output data to /tmp since I couldn't export the variable from the subshell back to the main process. As for the time gap I used 10 seconds on both read -t and timeout. I figure since the (timeout tshark) gets called and backgrounded right before keypress is called, it should work out pretty good.

Code:
#/bin/bash
counter="1"
main() {
while {{ "$counter" <= "3" )) ; do
(timeout 10s tshark -l -i eth0 2>/dev/null > /tmp/scritp1 & ); keypress
list=$(</tmp/script1)
echo "$list"
counter=$((counter+1))
done
exit
}

keypress() {
echo "keypress"
read -t 10 -s -n 1 key &&
if [[ "$key" == "q" ]] ; then echo "quit"
exit
else main
fi
}
main

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to prompt for input & accept input in ONE line

hi, am a new learner to shell programming. i have a script which will prompt for user to key in their name & display their name afterwards. script ===== echo "Pls enter your name:" read name echo "Your name is $name." output ===== Pls enter your name: Bob Your name is Bob. what... (2 Replies)
Discussion started by: newbie168
2 Replies

2. SuSE

inconsistent ls command display at the command prompt & running as a cron job

Sir, I using the following commands in a file (part of a bigger script): #!/bin/bash cd /opt/oracle/bin ls -lt | tail -1 | awk '{print $6}' >> /tmp/ramb.out If I run this from the command prompt the result is: 2007-05-16 if I run it as a cron job then... (5 Replies)
Discussion started by: rajranibl
5 Replies

3. UNIX for Dummies Questions & Answers

sleep 10 && command doesn't work

Hi there, I found a trick to easily postpone a command by a few seconds: supernova:~# sleep 10 && command &If you logout, the command should still be executed... But not all the time. Could anyone of you explain me why the following command is executed even after logging out: supernova:~# sleep... (2 Replies)
Discussion started by: chebarbudo
2 Replies

4. UNIX for Dummies Questions & Answers

Problem with xterm & tcsh & sourcing a script in a single command

Hi friends, I have a script that sets the env variable path based on different conditions. Now the new path variable setting should not done in the same terminal or same shell. Only a new terminal or new shell should have the new path env variable set. I am able to do this only as follows: >cd... (1 Reply)
Discussion started by: sowmya005
1 Replies

5. Shell Programming and Scripting

PHP read large string & split in multidimensional arrays & assign fieldnames & write into MYSQL

Hi, I hope the title does not scare people to look into this thread but it describes roughly what I'm trying to do. I need a solution in PHP. I'm a programming beginner, so it might be that the approach to solve this, might be easier to solve with an other approach of someone else, so if you... (0 Replies)
Discussion started by: lowmaster
0 Replies

6. Shell Programming and Scripting

Replace & sign to &amp word

Hi, I have text file abc.txt. In this file, I have the following data. Input: Mr Smith &amp Mrs Smith Mr Smith &apos Mrs Smith Mr Smith & Mrs Smith Mr Smith& Mrs Smith Mr Smith &Mrs Smith Output: Mr Smith &amp Mrs Smith Mr Smith &apos Mrs Smith Mr Smith &amp Mrs Smith Mr Smith&amp... (4 Replies)
Discussion started by: naveed
4 Replies

7. Shell Programming and Scripting

Using Grep & find & while read line in a script

Hello people! I would like to create one script following this stage I have one directory with 100 files File001 File002 ... File100 (This is the format of content of the 100 files) 2012/03/10 12:56:50:221875936 1292800448912 12345 0x00 0x04 0 then I have one... (0 Replies)
Discussion started by: Abv_mx81
0 Replies

8. Shell Programming and Scripting

[Solved] BASH - chaining TEST and COMMAND with && and II

Can you explain what this line of script is doing. What I have understood is : -- variable C is the name of a software which is either not installed, so it must be installed or allready installed and then should be update if newer version found -- branch B="$B $C" is to install the software --... (4 Replies)
Discussion started by: jcdole
4 Replies

9. Shell Programming and Scripting

If && command giving wrong output

Hi All, I am trying to run a script which will search for 2 strings(stopped,started) in a text file and echo an output depending on below condition -bash-3.2$ cat trial1.txt v ggg f -bash-3.2$ cat trial1.sh VAR9=` grep 'stopped' /tmp/trial1.txt` VAR10=` grep 'started'... (4 Replies)
Discussion started by: srkmish
4 Replies

10. Shell Programming and Scripting

SFTP Shell Script Get & Delete && Upload & Delete

Hi All, Do you have any sample script, - auto get file from SFTP remote server and delete file in remove server after downloaded. - only download specify filename - auto upload file from local to SFTP remote server and delete local folder file after uploaded - only upload specify filename ... (3 Replies)
Discussion started by: weesiong
3 Replies

LEARN ABOUT DEBIAN

setmaillist

setmaillist(1)						      General Commands Manual						    setmaillist(1)

NAME

       setmaillist - create a binary mailing list

SYNOPSIS

       setmaillist bin tmp

DESCRIPTION

       setmaillist reads a mailing list from its standard input.

       setmaillist writes the mailing list in a binary format to tmp; it then moves tmp to bin.  tmp and bin must be on the same filesystem.

       If there is a problem creating tmp, setmaillist complains and leaves bin alone.

       The binary mailing list format is portable across machines.

       setmaillist always creates bin world-readable.

MAILING LIST FORMAT

       The mailing list read by setmaillist is a series of lines.  NUL bytes are not allowed.

       If a line begins with a dot or slash, setmaillist takes the entire line as an include file name.

       If  a line begins with an ampersand, setmaillist takes the rest of the line as a recipient address.  If a line begins with a letter or num-
       ber, setmaillist takes the entire line as a recipient address.  Each recipient address must include a fully qualified domain name.  Recipi-
       ent addresses longer than 800 bytes are not allowed.

       setmaillist ignores blank lines and lines beginning with #.  It also ignores spaces and tabs at the ends of lines.

       For example,

	  god@heaven.af.mil
	  djb@silverton.berkeley.edu

       is a mailing list with two addresses.

SEE ALSO

       setforward(1), newinclude(1), printmaillist(1)

																    setmaillist(1)
All times are GMT -4. The time now is 01:19 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy