ping bat scipt

This is a discussion on ping bat scipt within the Tech Board forums, part of the Community Boards category; I am trying to write a simple batch script that will ping a machine on the local network (10.0.0.2) and ...

  1. #1
    Hamster without a wheel iain's Avatar
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    ping bat scipt

    I am trying to write a simple batch script that will ping a machine on the local network (10.0.0.2) and net send the server (10.0.0.1) the result
    -however this appears to be failing, can anyone point out why

    PING 10.0.0.2 FIND "TTL" >NUL
    IF ERRORLEVEL 1 net send 10.0.0.1 No Response
    IF ERRORLEVEL 0 net send 10.0.0.1 Responded

    is there something wrong with my logic - i dont do much batch scripting

    thanks
    Monday - what a way to spend a seventh of your life

  2. #2
    Yes, my avatar is stolen anonytmouse's Avatar
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    "IF ERRORLEVEL n" specifies a true condition if the last program run returned an exit code equal to or greater than the number specified. Therefore, your bat would run both net send commands when 0 is returned. We can use a dreaded goto to avoid this problem. I found that the FIND command is not needed as ping will return 0 on success and 1 on failure.
    Code:
    @ping 10.0.0.2 > nul
    @IF ERRORLEVEL 1 GOTO dead
    @IF ERRORLEVEL 0 GOTO alive
    
    :dead
    @net send 10.0.0.1 Dead
    @ECHO Dead
    @GOTO end
    
    :alive
    @net send 10.0.0.1 Alive
    @ECHO Alive
    @GOTO end
    
    :end
    @ECHO Goodbye
    Batch Files Reference and Examples
    Last edited by anonytmouse; 11-18-2004 at 04:25 PM.

  3. #3
    Hamster without a wheel iain's Avatar
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    i tried that script and it doesnt net send anything. I aslo tried it replacing net send with echo and then a message but that doesnt work either. I also cant seem to print the value of ERRORLEVEL
    echo ERRORLEVEL

    can anyone point out why this is not working?
    Monday - what a way to spend a seventh of your life

  4. #4
    and the hat of wrongness Salem's Avatar
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    > PING 10.0.0.2 FIND "TTL" >NUL
    What are you trying to get the exit status from - the ping command or the find command?
    This problem gets interesting enough in proper unix shells, so I can imagine the same thing in a windows shell to be hopeless if the answer isn't the one you're given.

  5. #5
    Yes, my avatar is stolen anonytmouse's Avatar
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    >> i tried that script and it doesnt net send anything. <<

    Yes it did. Please make sure net send is working by trying it on the command line. By default XP SP2 disables the Messenger service which is required to receive net send messages. You can enable the Messenger service by going to Control Panel->Administrative Services->Services and enabling the Messenger service.

    However, the script I posted was sending twice since I forgot that the net send command would alter the errorlevel. The script, as amended above, has been successfully tested on my computer.

    >> I also cant seem to print the value of ERRORLEVEL <<

    When echoing, variables must be enclosed in %.
    Code:
    ECHO %errorlevel%

  6. #6
    Hamster without a wheel iain's Avatar
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    It wasnt a problem with the messenger or the script, i'd made a small mistake changing part of the message. It all works great, thanks.
    Monday - what a way to spend a seventh of your life

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