Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Sending key events to background script

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Sending key events to background script
# 1  
Old 02-20-2011
Sending key events to background script
Hi,

short summary:
I need to send keystrokes from USB keyboard to background (bash-)script. I guess I have to use read on the right devive board but how and which?

My details:

I got a small home server with some VMs using KVM/Qemu, all are suse 11.3. But in general I work on a client using a keyboard switch. Additionally, I have a scanner (HP Officejet 6500).

Now I want to send scans into a VM. I did not get the scan button to work but I want to achieve a similar solution. I bought a numerical keyboard with USB connector, connected it to the server and fowarded the port into the target VM.
Next there should be a background process listening to that kayboard and running a variety of scanimage scripts when the numbers are pressed.

I found the keyboard device under /dev/input/by-id/... and probably also under /dev/bus/usb/001/00[1-4]. Unfortunately, the output looks very "raw". I guess there must be an other device to connect to?

Thank you for your help,
Snowman
Login or Register to Ask a Question

Previous Thread | Next Thread

8 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Need help regarding sending sleep to background

Hi, can we print anything, when sleep is running..? like printing dots(.. . . . . . . . .) to indicate that some process is going on...? i mean, can we send sleep to background, proceed with printing, till sleep is going on... in s single step. I have written a funtion to solve this. ... (1 Reply)
Discussion started by: Dpu
1 Replies

2. Programming

Simulating background X11 events

Hi everybody! I've following this forum for a while but now it is my turn to do a question since a did not find the answer anywhere (I've been searching for days and there is no way). I am working on a client-server platform where the server renders 3D models and sends images to the client... (3 Replies)
Discussion started by: benderz
3 Replies

3. Shell Programming and Scripting

Sending Key Presses

Hi. Im wondering if there is a way to output key presses using a script? Something like this: key=down key=down key=up So say if it was sent to Firefox it would make the window scroll down twice then up once. (1 Reply)
Discussion started by: Grizzly
1 Replies

4. Shell Programming and Scripting

sending email as background process

Hi All, Solaris Bash v3x I have a script that accepts an error code, and if the error code is not 0 then an email is sent using mailx to details the error. I want to be able to implement the functiuonlity whereby i can send the email in a background process so the script can continue with... (3 Replies)
Discussion started by: satnamx
3 Replies

5. Programming

capture key board events using C program

hi This is mahesh please can any one post source of 'c'. to capture key board events. thank u (1 Reply)
Discussion started by: smahesh2007
1 Replies

6. Shell Programming and Scripting

How to include RETURN KEY with Background process "&" in Shell Script

Hello All, I am a newbie in Shell script programming, and maybe you can help me with my query. I need to write a shell script (mntServer.ksh) that will start a background process and also to be able to run another script. The mntServer.ksh script contains: #!/bin/ksh... (1 Reply)
Discussion started by: racbern
1 Replies

7. UNIX for Dummies Questions & Answers

Creating keymaps/key events

Hi all, Total newbie here so sorry for any offence caused... Anyway totally a windows slave, only ever used that, closest i got to programming was in DOS and HTML, yeah i know doesn't compare but just setting up the background. Have installed Cygwin and have learned a bit about Unix and... (0 Replies)
Discussion started by: newbiex25
0 Replies

8. Programming

Sending INtr key for remote terminal

Hi folks, Just wondering if anyone knows how to send intr/break key to remote tty (shell), a simple example would be great! thx (2 Replies)
Discussion started by: andryk
2 Replies
Login or Register to Ask a Question

LEARN ABOUT MINIX

pnmcrop

pnmcrop(1)                                                    General Commands Manual                                                   pnmcrop(1)

NAME

       pnmcrop - crop a portable anymap

SYNOPSIS

       pnmcrop [-white|-black|-sides] [-left] [-right] [-top] [-bottom] [pnmfile]

       All options may be abbreviated to their shortest unique prefix or specified with double hyphens.

DESCRIPTION

       Reads a PBM, PGM, or PPM image as input.  Removes borders that are the background color, and produces the same type of image as output.

       If  you don't specify otherwise, pnmcrop assumes the background color is whatever color the top left and right corners of the image are and
       if they are different colors, something midway between them.  You can specify that the background is white or black  with  the  -white  and
       -black options or make pnmcrop base its guess on all four corners instead of just two with -sides.

       By  default,  pnmcrop  chops  off any stripe of background color it finds, on all four sides.  You can tell pnmcrop to remove only specific
       borders with the -left, -right, -top, and -bottom options.

       If you want to chop a specific amount off the side of an image, use pnmcut.

       If you want to add different borders after removing the existing ones, use pnmcat or pnmcomp.

OPTIONS

       -white Take white to be the background color.  pnmcrop removes borders which are white.

       -black Take black to be the background color.  pnmcrop removes borders which are black.

       -sides Determine the background color from the colors of the four corners of the input image.  pnmcrop removes borders  which  are  of  the
              background color.

              If at least three of the four corners are the same color, pnmcrop takes that as the background color.  If not, pnmcrop looks for two
              corners of the same color in the following order, taking the first found as the background color: top, left, right, bottom.  If  all
              four corners are different colors, pnmcrop assumes an average of the four colors as the background color.

              The  -sides option slows pnmcrop down, as it reads the entire image to determine the background color in addition to the up to three
              times that it would read it without -sides.

       -left  Remove any left border.

       -right Remove any right border.

       -top   Remove any top border.

       -bottom
              Remove any bottom border.

       -verbose
              Print on Standard Error information about the processing, including exactly how much is being cropped off of which sides.

SEE ALSO

       pnmcut(1), pnmfile(1), pnm(5)

AUTHOR

       Copyright (C) 1989 by Jef Poskanzer.

                                                                   18 March 2001                                                        pnmcrop(1)