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Full Discussion: Bash arrays that compare ip addresses.
Top Forums Shell Programming and Scripting Bash arrays that compare ip addresses. Post 302747581 by Azrael on Friday 21st of December 2012 04:30:05 PM
Old 12-21-2012
Bash arrays that compare ip addresses.
I've been trying to have an array of ip addresses go through a loop one at a time. Then compare if the current element is in another array of ip addresses. I've traced my error with /bin/bash -x

Code:
+ for c in '"${ip[@]}"'
./netk5: line 65: 50.17.231.23 23.64.146.110 23.64.159.139 107.14.36.129 31.13.74.7 173.194.77.95: syntax error: invalid arithmetic operator (error token is ".17.231.23 23.64.146.110 23.64.159.139 107.14.36.129 31.13.74.7 173.194.77.95")

From what I found on Google it seems Bash isn't great at comparing floating point numbers. I saw some suggestions on piping through bc first, but I'm unfamiliar with how that would work here. Perhaps there's also a simpler way.

Here is the code I'm using:

Code:
 #!/bin/bash -x

fox="firefox"

declare -a white

while true 
do

  stat=`netstat -antup | awk '{ print $7 }' | grep firefox | sed -ne "s/^[^\/]\+\///p" | awk '!x[$0]++';`
  b=$stat

     if [ "$b" = "$fox" ];
     then
     
     getip=`netstat -antup | grep firefox | awk '{ print $5 }' | sed -e 's/:[^:]*$//' | awk '!x[$0]++';`
     ip+=$getip

        for c in "${ip[@]}"
        do
            if [ $c == "${white[$c]}" ]
            then
                echo -e "${white[$c]} in array\n"

            else

                echo -e "Not in array"

                pass=${ip[$c]}
                white+=$pass
           
           # clear array to avoid duplicates
             unset ip

        fi

   done
fi

sleep 2

done

Right now it looks to see if an ip Firefox is connected to is in the "white" array. You may have to refresh your browser to get an ip.

UPDATE: It doesn't seem to be an issue with bc. I tried using the following to get the first ip's and the error persists:
Code:
timeout 1 bc | netstat -antup | grep firefox | awk '{ print $5 }' | sed -e 's/:[^:]*$//' | awk '!x[$0]++'

Last edited by Azrael; 12-21-2012 at 06:48 PM.. Reason: New information
 

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LEARN ABOUT SUSE

firefox

FIREFOX(1)							Linux User's Manual							FIREFOX(1)

NAME

       firefox - a Web browser for X11 derived from the Mozilla browser

SYNOPSIS

       firefox [OPTIONS] [URL]

DESCRIPTION

       Mozilla Firefox is an open-source web browser, designed for standards compliance, performance and portability.

USAGE

       firefox is a simple shell script that will set up the environment for the actual executable.

OPTIONS

       A summary of the options supported by firefox is included below.

   GTK options
       --gdk-debug=FLAGS Gdk debugging flags to set

       --gdk-no-debug=FLAGS
	      Gdk debugging flags to unset

       --gtk-debug=FLAGS
	      Gtk+ debugging flags to set

       --gtk-no-debug=FLAGS
	      Gtk+ debugging flags to unset

       --gtk-module=MODULE
	      Load an additional Gtk module

   X11 options
       --display=DISPLAY
	      X display to use

       --sync Make X calls synchronous

       --no-xshm
	      Don't use X shared memory extension

       --xim-preedit=STYLE

       --xim-status=STYLE

       --g-fatal-warnings
	      Make all warnings fatal

   Firefox options
       -h, -help
	      Show summary of options.

       -height value
	      Set height of startup window to value.

       -width value
	      Set width of startup window to value.

       -v, -version
	      Print /usr/bin/firefox-bin version.

       -CreateProfile profile
	      Create profile.

       -P profile
	      Start with profile.

       -ProfileManager
	      Start with profile manager.

       -UILocale lang-region
	      Start with lang-region resources.

       -contentLocale lang-region
	      Start with lang-region resources.

       -remote command
	      Execute command in an already running Firefox process.  For more info, see: http://www.mozilla.org/unix/remote.html

       -no-remote
	      Don't try to control an already running instance.

       -jsconsole
	      Start with Javascript Console

       -chrome url
	      Load the specified chrome.

       -new-window url
	      Open URL in a new window if Firefox is already running.

       -new-tab url
	      Open URL in a new tab if Firefox is already running.

       -preferences
	      Open Firefox preferences menu.

       -safe-mode
	      Disables extensions and themes for this session.

       FILES  /usr/bin/firefox - shell script wrapping firefox
	      /usr/lib/firefox/firefox - firefox executable

VERSION

       3.0

BUGS

       To report a bug, please visit http://bugzilla.mozilla.org/

SEE ALSO

       mozilla(1)

AUTHORS

       The Mozilla Organization
	      http://www.mozilla.org/about.html

firefox 							 January 04, 2006							FIREFOX(1)
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