Results 1 to 4 of 4

Thread: Wanted: Bash program idea, or application suggestion

  1. #1
    Senior Member registered user
    Join Date
    May 2006
    Location
    Columbia, Maryland USA
    Posts
    1,631

    Wanted: Bash program idea, or application suggestion

    .
    I would like to create a small bash program that would
    monitor my keystroke activity and if no keystrokes are noted
    within a fixed small time, then any currently active
    internet connection would be disconnected.

    I currently use a Knoppix LiveUSB and wifi via a broadband router
    with network connections handled by NetworkManager.

    If there's 'an app for this' already, then that might also serve.

    Thanks in advance.

  2. #2
    Senior Member registered user
    Join Date
    Feb 2010
    Posts
    512
    Hi utu, I do not have a bash script for you, but I have got some suggestions. First of all, you can disable and enable the network from the commandline by using the commands
    Code:
    nmcli networking off
    and
    Code:
    nmcli networking on
    I think the task is similar to a screensaver because in both cases user inactivity starts a process. I read about a user who wanted to download torrents while the screensaver is active. His or her solution was to ask dbus whether the screensaver was active. He or she used the Gnomedesktop environment. Later I read the solution has to be modified if KDE is used instead of Gnome. Since xscreensaver does not seem to use dbus I think you should try to find out if power management provides an interface to run one shell script on times of user inactivity and another if the user is active again. The absence of keyboard events should start a bash script, but what about mouse events? How long is a 'small time'? Do you intend to reconnect to the network if there is any keystroke activity again?

  3. #3
    Senior Member registered user
    Join Date
    May 2006
    Location
    Columbia, Maryland USA
    Posts
    1,631
    .
    Thanks for your responses, klaus2008.

    nmcli is probably part of the solution; I'll study up on that.

    I should have indicated keyboard and/or mouse events as an indication or
    lack of user presence or attention to internet events.

    I think 'a small time' might be some random number between 15 and 30 minutes
    as a starting point.

    If I know I'm not going to use Knoppix for a while, I manually disconnect.
    If I'm interrupted, I might forget to do this; I'd like Linux to disconnect
    automatically, if need be. Solution need not consider re-connect, since that's
    easy enough to do manually with the NM panel applet.

    You can't underestimate my programming prowess. At most I may be able to
    figure out a line of bash script. I wouldn't have a prayer with C/C+/or C++
    source, even if I had it to look at.

  4. #4
    Senior Member registered user
    Join Date
    May 2006
    Location
    Columbia, Maryland USA
    Posts
    1,631
    .
    Two other building blocks seem to be

    Code:
    xscreensaver-command -watch
    and the following perl program, which tracks the output of the -watch command
    and reacts accordingly:

    Code:
        #!/usr/bin/perl
        my $blanked = 0;
        open (IN, "xscreensaver-command -watch |");
        while (<IN>) { 
           if (m/^(BLANK|LOCK)/) { 
               if (!$blanked) { 
    #              **** action to take when screensaver starts ****
                   $blanked = 1;
               }
           } elsif (m/^UNBLANK/) {
    #              **** action (if any) to take when screensaver is reset ****
                   $blanked = 0;
           } 
        }
    I don't think perl should be necessary, and there is probably a simpler
    bash equivalent that would suffice.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


Dell Computer PC Desktop 8GB Ram 500GB HD Intel Quad Core i5 3.10GHz Windows 10  picture

Dell Computer PC Desktop 8GB Ram 500GB HD Intel Quad Core i5 3.10GHz Windows 10

$149.99



Dell i5 Desktop Computer PC | up to 16GB RAM, 3TB SSD | Windows 10 Pro | WiFi BT picture

Dell i5 Desktop Computer PC | up to 16GB RAM, 3TB SSD | Windows 10 Pro | WiFi BT

$210.60



HP Desktop PC Core i5 8GB RAM 500GB HD DVD Wi-Fi Windows 10 Computer 19

HP Desktop PC Core i5 8GB RAM 500GB HD DVD Wi-Fi Windows 10 Computer 19" Monitor

$165.56



Dell i5 Mini Computer PC | up to 16GB RAM, 1TB SSD | Windows 10 | WiFi Bluetooth picture

Dell i5 Mini Computer PC | up to 16GB RAM, 1TB SSD | Windows 10 | WiFi Bluetooth

$174.60



Windows 11 Pro Mini PC Intel J4125 Quad Core 2.7GHz 8GB RAM DDR4 128GB SSD GK3V picture

Windows 11 Pro Mini PC Intel J4125 Quad Core 2.7GHz 8GB RAM DDR4 128GB SSD GK3V

$194.95



IMAGIN Gaming PC SSD NVIDIA I9 XEON 8-Core 16GB RAM 1TB HDD FORTNITE WINDOWS 11 picture

IMAGIN Gaming PC SSD NVIDIA I9 XEON 8-Core 16GB RAM 1TB HDD FORTNITE WINDOWS 11

$550.00



Dell Desktop Computer 500GB HD 8GB RAM Core  DVD WiFi Windows 10 PC LCD bundle picture

Dell Desktop Computer 500GB HD 8GB RAM Core DVD WiFi Windows 10 PC LCD bundle

$165.00



Acer Aspire XC - Desktop Intel Core i3-10105 3.70GHz 8GB RAM 256GB SSD W10H picture

Acer Aspire XC - Desktop Intel Core i3-10105 3.70GHz 8GB RAM 256GB SSD W10H

$249.99



Dell Intel Core i5 Desktop Computer PC 8GB RAM 500GB HD Windows 10 22

Dell Intel Core i5 Desktop Computer PC 8GB RAM 500GB HD Windows 10 22" LCD Wi-Fi

$187.95



Lenovo Desktop Computer Tiny Mini Core i3 8GB Ram 500GB Windows 10 Pro PC WiFi picture

Lenovo Desktop Computer Tiny Mini Core i3 8GB Ram 500GB Windows 10 Pro PC WiFi

$134.99