test return value from db_query before assuming it is valid

make the sql query form consistent in usage by cleaning up instances
where db_query's result was not inspected before attempting to fetch row
data from the handle

Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>

web/html/addvote.php

@@ -21,14 +21,26 @@ if ($atype == "Trusted User" OR $atype == "Developer") {
 
 		if (!empty($_POST['user'])) {
 			$qcheck = "SELECT * FROM Users WHERE Username = '" . mysql_real_escape_string($_POST['user']) . "'";
-			$check = mysql_num_rows(db_query($qcheck, $dbh));
+			$result = db_query($qcheck, $dbh);
+			if ($result) {
+				$check = mysql_num_rows($result);
+			}
+			else {
+				$check = 0;
+			}
 
 			if ($check == 0) {
 				$error.= __("Username does not exist.");
 			} else {
 				$qcheck = "SELECT * FROM TU_VoteInfo WHERE User = '" . mysql_real_escape_string($_POST['user']) . "'";
 				$qcheck.= " AND End > UNIX_TIMESTAMP()";
-				$check = mysql_num_rows(db_query($qcheck, $dbh));
+				$result = db_query($qcheck, $dbh);
+				if ($result) {
+					$check = mysql_num_rows($result);
+				}
+				else {
+					$check = 0;
+				}
 
 				if ($check != 0) {
 					$error.= __("%s already has proposal running for them.", htmlentities($_POST['user']));

web/html/tu.php

@@ -36,7 +36,13 @@ if ($atype == "Trusted User" OR $atype == "Developer") {
 				$qvoted = "SELECT * FROM TU_Votes WHERE ";
 				$qvoted.= "VoteID = " . $row['ID'] . " AND ";
 				$qvoted.= "UserID = " . uid_from_sid($_COOKIE["AURSID"]);
-				$hasvoted = mysql_num_rows(db_query($qvoted, $dbh));
+				$result = db_query($qvoted, $dbh);
+				if ($result) {
+					$hasvoted = mysql_num_rows($result);
+				}
+				else {
+					$hasvoted = 0;
+				}
 
 				# List voters of a proposal.
 				$qwhoVoted = "SELECT tv.UserID,U.Username
@@ -85,12 +91,17 @@ if ($atype == "Trusted User" OR $atype == "Developer") {
 						$canvote = 0;
 						$errorvote = __("You've already voted for this proposal.");
 						# Update if they voted
-						$hasvoted = mysql_num_rows(db_query($qvoted, $dbh));
+						$result = db_query($qvoted, $dbh);
+						if ($result) {
+							$hasvoted = mysql_num_rows($result);
+						}
 
 						$results = db_query($q, $dbh);
+						if ($results) {
 							$row = mysql_fetch_assoc($results);
 						}
 					}
+				}
 				include("tu_details.php");
 			}
 		} else {

web/lib/acctfuncs.inc

@@ -718,11 +718,11 @@ function valid_user( $user )
 		$q = "SELECT ID FROM Users WHERE Username = '"
 			. mysql_real_escape_string($user). "'";
 
-		$result = mysql_fetch_row(db_query($q, $dbh));
-
+		$result = db_query($q, $dbh);
 		# Is the username in the database?
-		if ($result[0]) {
-			return $result[0];
+		if ($result) {
+			$row = mysql_fetch_row($result);
+			return $row[0];
 		}
 	}
 	return;
@@ -751,28 +751,33 @@ function valid_passwd( $userID, $passwd )
 			$passwd_q = "SELECT ID FROM Users" .
 				" WHERE ID = " . $userID  . " AND Passwd = '" .
 				salted_hash($passwd, $salt) . "'";
-			$passwd_result = mysql_fetch_row(db_query($passwd_q, $dbh));
+			$result = db_query($passwd_q, $dbh);
+			if ($result) {
+				$passwd_result = mysql_fetch_row($result);
 				if ($passwd_result[0]) {
 					return true;
 				}
+			}
 		} else {
 			# check without salt
 			$nosalt_q = "SELECT ID FROM Users".
 				" WHERE ID = " . $userID .
 				" AND Passwd = '" . md5($passwd) . "'";
-			$nosalt_result = mysql_fetch_row(db_query($nosalt_q, $dbh));
-			if ($nosalt_result[0]) {
+			$result = db_query($nosalt_q, $dbh);
+			if ($result) {
+				$nosalt_row = mysql_fetch_row($result);
+				if ($nosalt_row[0]) {
 					# password correct, but salt it first
 					if (!save_salt($userID, $passwd)) {
 						trigger_error("Unable to salt user's password;" .
 							" ID " . $userID, E_USER_WARNING);
 						return false;
 					}
-
 					return true;
 				}
 			}
 		}
+	}
 	return false;
 }
 
@@ -783,10 +788,13 @@ function user_suspended( $id )
 {
 	$dbh = db_connect();
 	$q = "SELECT Suspended FROM Users WHERE ID = " . $id;
-	$result = mysql_fetch_row(db_query($q, $dbh));
+	$result = db_query($q, $dbh);
+	if ($result) {
+		$row = mysql_fetch_row($result);
 		if ($result[0] == 1 ) {
 			return true;
 		}
+	}
 	return false;
 }
 
@@ -797,7 +805,7 @@ function user_delete( $id )
 {
 	$dbh = db_connect();
 	$q = "DELETE FROM Users WHERE ID = " . $id;
-	$result = mysql_fetch_row(db_query($q, $dbh));
+	db_query($q, $dbh);
 	return;
 }
 
@@ -809,10 +817,13 @@ function user_is_privileged( $id )
 {
 	$dbh = db_connect();
 	$q = "SELECT AccountTypeID FROM Users WHERE ID = " . $id;
-	$result = mysql_fetch_row(db_query($q, $dbh));
+	$result = db_query($q, $dbh);
+	if ($result) {
+		$row = mysql_fetch_row($result);
 		if( $result[0] > 1) {
 			return $result[0];
 		}
+	}
 	return 0;
 
 }

web/lib/aur.inc

@@ -491,8 +491,12 @@ function get_salt($user_id)
 {
 	$dbh = db_connect();
 	$salt_q = "SELECT Salt FROM Users WHERE ID = " . $user_id;
-	$salt_result = mysql_fetch_row(db_query($salt_q, $dbh));
-	return $salt_result[0];
+    $result = db_query($salt_q, $dbh);
+    if ($result) {
+        $salt_row = mysql_fetch_row($result);
+	    return $salt_row[0];
+    }
+    return;
 }
 
 function save_salt($user_id, $passwd)

web/lib/pkgfuncs.inc

@@ -507,7 +507,13 @@ function pkg_search_page($SID="") {
 	$q_total = "SELECT COUNT(*) " . $q_from . $q_where;
 
 	$result = db_query($q, $dbh);
-	$total = mysql_result(db_query($q_total, $dbh), 0);
+	$result_t = db_query($q_total, $dbh);
+	if ($result_t) {
+		$total = mysql_result($result_t, 0);
+	}
+	else {
+		$total = 0;
+	}
 
 	if ($result && $total > 0) {
 		if (isset($_GET["SO"]) && $_GET["SO"] == "d"){
@@ -859,7 +865,13 @@ function pkg_notify ($atype, $ids, $action = True) {
 	# format in which it's sent requires this.
 	foreach ($ids as $pid) {
 		$q = "SELECT Name FROM Packages WHERE ID = $pid";
-		$pkgname = mysql_result(db_query($q, $dbh), 0);
+		$result = db_query($q, $dbh);
+		if ($result) {
+			$pkgname = mysql_result($result , 0);
+		}
+		else {
+			$pkgname = '';
+		}
 
 		if ($first)
 			$first = False;
@@ -872,7 +884,8 @@ function pkg_notify ($atype, $ids, $action = True) {
 			$q .= " AND PkgID = $pid";
 
 			# Notification already added. Don't add again.
-			if (!mysql_num_rows(db_query($q, $dbh))) {
+			$result = db_query($q, $dbh);
+			if (!mysql_num_rows($result)) {
 				$q = "INSERT INTO CommentNotify (PkgID, UserID) VALUES ($pid, $uid)";
 				db_query($q, $dbh);
 			}
@@ -967,8 +980,12 @@ function pkg_change_category($atype) {
 	$q.= "FROM Packages ";
 	$q.= "WHERE Packages.ID = ".$pid;
 	$result = db_query($q, $dbh);
-	echo mysql_error();
+	if ($result) {
 		$pkg = mysql_fetch_assoc($result);
+	}
+	else {
+		return __("You are not allowed to change this package category.");
+	}
 
 	$uid = uid_from_sid($_COOKIE["AURSID"]);
 	if ($uid == $pkg["MaintainerUID"] or

web/template/actions_form.php

@@ -8,25 +8,31 @@
 		#
 		$q = "SELECT * FROM PackageVotes WHERE UsersID = ". $uid;
 		$q.= " AND PackageID = ".$row["ID"];
-		if (!mysql_num_rows(db_query($q, $dbh))) {
+		$result = db_query($q, $dbh);
+		if ($result) {
+			if (!mysql_num_rows($result)) {
 				echo "      <input type='submit' class='button' name='do_Vote'";
 				echo " value='".__("Vote")."' /> ";
 			} else {
 				echo "<input type='submit' class='button' name='do_UnVote'";
 				echo " value='".__("UnVote")."' /> ";
 			}
+		}
 
 		# Comment Notify Button
 		#
 		$q = "SELECT * FROM CommentNotify WHERE UserID = ". $uid;
 		$q.= " AND PkgID = ".$row["ID"];
-		if (!mysql_num_rows(db_query($q, $dbh))) {
+		$result = db_query($q, $dbh);
+		if ($result) {
+			if (!mysql_num_rows($result)) {
 				echo "<input type='submit' class='button' name='do_Notify'";
 				echo " value='".__("Notify")."' title='".__("New Comment Notification")."' /> ";
 			} else {
 				echo "<input type='submit' class='button' name='do_UnNotify'";
 				echo " value='".__("UnNotify")."' title='".__("No New Comment Notification")."' /> ";
 			}
+		}
 
 		if ($row["OutOfDateTS"] === NULL) {
 			echo "<input type='submit' class='button' name='do_Flag'";

web/template/tu_list.php

@@ -40,7 +40,13 @@
 					<td class='<?php print $c ?>'>
 						<?php
 						$q = "SELECT * FROM TU_Votes WHERE VoteID = " . $row['ID'] . " AND UserID = " . uid_from_sid($_COOKIE["AURSID"]);
-						$hasvoted = mysql_num_rows(db_query($q, $dbh));
+						$result_tulist = db_query($q, $dbh);
+						if ($result_tulist) {
+							$hasvoted = mysql_num_rows($result_tulist);
+						}
+						else {
+							$hasvoted = 0;
+						}
 						?>
 						<span class='f5'><span class='blue'>
 						<?php if ($hasvoted == 0) { ?>