php to execute c++ programs

This is a discussion on php to execute c++ programs within the C++ Programming forums, part of the General Programming Boards category; Currently I have PHP4 running on my localhost and I can execute programs that I've written (a simple program that ...

  1. #1
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    php to execute c++ programs

    Currently I have PHP4 running on my localhost and I can execute programs that I've written (a simple program that will insert a dummy entry into a sqlite database).

    What I want to do is somehow initiate an event in a program (a daemon to be specific), (unlike previously executing a specific program).

    I have this board that needs to be pinged, and I am required that I do not run a separate program. I need to see how I can turn on like an interrupt, or perhaps a polling scheme to allow this, but I'm not sure how it can be done.

    Another solution would be to call a program, which will interface with the daemon... how would that work?

    Thanks in advance!

  2. #2
    Carnivore ('-'v) Hunter2's Avatar
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    Well, first you'll need to figure out how to interface with the daemon... it's not like there's a standard that says "All daemons must interface in this way: ___".

    >>I need to see how I can turn on like an interrupt, or perhaps a polling scheme to allow this
    As above: it's 100% up to the daemon how it chooses to interface with the user, assuming it does in the first place. Whether it polls on a file, or a socket, or who-knows-what, varies from daemon to daemon. Your best bet will be to read the daemon's man page (assuming it has one) and find out what mechanisms you have to work with.
    Just Google It. √

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    well, i currently have this post button:

    <form method="POST" action="<?php exec("/root/armtest"); ?>">

    however in the end I want to be able to trigger a function within a c++ program (the daemon) that is written. I have no clue how to do this. any ideas?

  4. #4
    (?<!re)tired Mario F.'s Avatar
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    are you the one who codes the daemon?
    The programmer’s wife tells him: “Run to the store and pick up a loaf of bread. If they have eggs, get a dozen.”
    The programmer comes home with 12 loaves of bread.


    Originally Posted by brewbuck:
    Reimplementing a large system in another language to get a 25% performance boost is nonsense. It would be cheaper to just get a computer which is 25% faster.

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    The superhaterodyne twomers's Avatar
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    Real oldschool programmers aren't afraid to use goto

  6. #6
    C++ Enthusiast jmd15's Avatar
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    When you execute the program pass an argument to it and in the program, execute that function when the specified input is entered. Just a suggestion maybe I don't understand what you're asking.
    Trinity: "Neo... nobody has ever done this before."
    Neo: "That's why it's going to work."
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    Carnivore ('-'v) Hunter2's Avatar
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    ^ ^ ^ ^ ^ ^ ^ ^ ^ ^
    Echo Mario F. above.
    If the answer is 'no', echo Hunter2 above.
    Just Google It. √

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  8. #8
    int x = *((int *) NULL); Cactus_Hugger's Avatar
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    Quote Originally Posted by kdoggfunkstah
    well, i currently have this post button:

    <form method="POST" action="<?php exec("/root/armtest"); ?>">
    That probably doesn't do what you want it to do. (Learn PHP...) That will output "<form method="POST" action="">, and armtest will execute when the page is loaded, not when the button is pushed.
    You could do the following:
    Code:
    <?php
    if(isset($_POST['runprog'])) exec("/root/armtest");
    ?>
    <form method="POST" action="url/to/this/page.php">
    <input type="hidden" name="runprog" value="1" />
    <input type="submit" />
    </form>
    Quote Originally Posted by kdoggfunkstah
    however in the end I want to be able to trigger a function within a c++ program (the daemon) that is written. I have no clue how to do this. any ideas?
    How would you do it normally? Once you know that, do it the same way in your PHP code. This is much easier if you're the writer of the program.
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  9. #9
    Cat without Hat CornedBee's Avatar
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    Quote Originally Posted by Cactus_Hugger
    Code:
    <input type="hidden" name="runprog" value="1" />
    <input type="submit" />
    Or simply
    Code:
    <input type="submit" name="runprog" value="Submit" />
    All the buzzt!
    CornedBee

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