[enh] Bootstrap PHP interface

sources/lib/unix_func.php

@@ -0,0 +1,49 @@
+<?php 
+
+ /**
+  *  YunoHost - Self-hosting for all
+  *  Copyright (C) 2012  Kload <kload@kload.fr>
+  *
+  *  This program is free software: you can redistribute it and/or modify
+  *  it under the terms of the GNU Affero General Public License as
+  *  published by the Free Software Foundation, either version 3 of the
+  *  License, or (at your option) any later version.
+  *
+  *  This program is distributed in the hope that it will be useful,
+  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  *  GNU Affero General Public License for more details.
+  *
+  *  You should have received a copy of the GNU Affero General Public License
+  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+  */
+  
+function read_file($file, $lines = 20) {
+
+    if (!$handle = fopen($file, "r"))
+        return false;
+    $linecounter = $lines;
+    $pos = -2;
+    $beginning = false;
+    $text = array();
+    while ($linecounter > 0) {
+        $t = " ";
+        while ($t != "\n") {
+            if(fseek($handle, $pos, SEEK_END) == -1) {
+                $beginning = true;
+                break;
+            }
+            $t = fgetc($handle);
+            $pos --;
+        }
+        $linecounter --;
+        if ($beginning) {
+            rewind($handle);
+        }
+        $text[$lines-$linecounter-1] = fgets($handle);
+        if ($beginning) break;
+    }
+    fclose ($handle);
+    return array_reverse($text);
+}
+