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POScanning with scanimage from php from a linux host
 

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  1. POScanning with scanimage from php from a linux host
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    <p>Here's what the situation is: I am trying to use PHP to call <code>scanimage</code> on a Linux host, then save the resulting file to a web directory for future use.</p> <p>The below code produces no errors, but when I check out the /tmp directory, file.pnm is blank, and the scanner never starts. </p> <pre><code>&lt;?php require('/var/www/olin/includes/functions.php'); $con = connect_db(); //setup the POST variables if (isset($_POST['submit'])) { $fname = mysqli_real_escape_string($con, $_POST['fname']); $lname = mysqli_real_escape_string($con, $_POST['lname']); $license_no = mysqli_real_escape_string($con, $_POST['license_no']); $comments = mysqli_real_escape_string($con, $_POST['comments']); } if ($license_no == '') { $license_no = "None on File"; } if ($fname == '' || $lname == '') { echo '&lt;h1 class="message"&gt;Can\'t submit visitor: you are missing information!&lt;/h1&gt;'; } else { //setup the query and prepare it for exection $query= "insert into visitors (fname, lname, license_no, redsheet, comments)" . " values (?, ?, ?, 'Allow', ?) on duplicate key update fname = values(fname)," . "lname = values(lname), license_no = values(license_no), redsheet = values(redsheet)," . "comments = values(comments)"; $stmnt= mysqli_prepare($con, $query); //bind the statement parameters to variables mysqli_stmt_bind_param($stmnt, "ssss", $fname, $lname, $license_no, $comments ); //execute, then close the statment if (!mysqli_stmt_execute($stmnt)) { echo "Failed to ececute the query: " . mysqli_error($con); header('Refresh: 10; url=http://localhost/olin/visitor.php'); } } // we'll `try` to scan the license if the checkbox is selected if (isset($_POST['pic_id'])) { // get the info from the db $query = 'select id from visitors where license_no = "'.$license_no.'"'; $result = mysqli_query($con, $query); while ($row = mysqli_fetch_array($result)) { $id = $row['id']; // set up the path to save the id to (and put path into db for further look up // and display) $dir = ( $id % 30 ); $path = '/var/www/olin/images/licenses/'.$dir.'/'.$id.'-license.png'; $path = addslashes(mysqli_real_escape_string($con, $path)); $path1 = '/images/licenses/'.$dir.'/'.$id.'-license.png'; // start the scan, and save image $command = '/home/jmd9qs/bin/scan.sh "'.$path.'"'; $update = 'update visitors set id_pic = "'.$path1.'" where id="'.$id.'"'; mysqli_query($con, $update) or die ('Error: ' . mysqli_error($con)); exec($command); header('Location: http://localhost/olin/visitor.php'); } } ?&gt; </code></pre> <p>Can anybody provide any hints?</p> <p>UPDATE:</p> <p>I have the server running the command now (I know it's failing because of the Apache2 error log).</p> <p>Here's the error I get: <code>scanimage: open of device brother3:bus2;dev1 failed: Invalid argument</code></p> <p>I've tried adding the www-data user to the <code>scanner</code> and <code>lp</code> groups, but it seems to have no effect... The <code>scanimage</code> command I'm using works under my normal user and as root, so I'm now positive the command I'm using should work. I am still at a loss...</p> <p>UPDATE (again):</p> <p>I've fixed some errors in my code... now the server <em>will</em> scan and successfully save images! However, it only works once and then for some odd reason I have to run the <code>scan.sh</code> (which I put the <code>scanimage</code> command into) through my shell for it to run again... otherwise I get the same error message!</p> <p>Very weird, I have NO clue why, suggestions wanted!</p>
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    1. USJørgen R
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    1. COI think I have this working now... I had to change the udev rules for libsane... I get a "invalid rule" error message on bootup, but I haven't had any issues after changing it!
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    2. COHere's the link for where I found the new udev rules: (http://welcome.solutions.brother.com/bsc/public_s/id/linux/en/instruction_scn1c.html#u9.10)
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