init

lib/sysplugins/smarty_internal_runtime_writefile.php

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+<?php
+/**
+ * Smarty write file plugin
+ *
+ * @package    Smarty
+ * @subpackage PluginsInternal
+ * @author     Monte Ohrt
+ */
+
+/**
+ * Smarty Internal Write File Class
+ *
+ * @package    Smarty
+ * @subpackage PluginsInternal
+ */
+class Smarty_Internal_Runtime_WriteFile
+{
+    /**
+     * Writes file in a safe way to disk
+     *
+     * @param string $_filepath complete filepath
+     * @param string $_contents file content
+     * @param Smarty $smarty    smarty instance
+     *
+     * @throws SmartyException
+     * @return boolean true
+     */
+    public function writeFile($_filepath, $_contents, Smarty $smarty)
+    {
+        $_error_reporting = error_reporting();
+        error_reporting($_error_reporting & ~E_NOTICE & ~E_WARNING);
+        $_dirpath = dirname($_filepath);
+        // if subdirs, create dir structure
+        if ($_dirpath !== '.') {
+            $i = 0;
+            // loop if concurrency problem occurs
+            // see https://bugs.php.net/bug.php?id=35326
+            while (!is_dir($_dirpath)) {
+                if (@mkdir($_dirpath, 0777, true)) {
+                    break;
+                }
+                clearstatcache();
+                if (++$i === 3) {
+                    error_reporting($_error_reporting);
+                    throw new SmartyException("unable to create directory {$_dirpath}");
+                }
+                sleep(1);
+            }
+        }
+        // write to tmp file, then move to overt file lock race condition
+        $_tmp_file = $_dirpath . DIRECTORY_SEPARATOR . str_replace(array('.', ','), '_', uniqid('wrt', true));
+        if (!file_put_contents($_tmp_file, $_contents)) {
+            error_reporting($_error_reporting);
+            throw new SmartyException("unable to write file {$_tmp_file}");
+        }
+        /*
+         * Windows' rename() fails if the destination exists,
+         * Linux' rename() properly handles the overwrite.
+         * Simply unlink()ing a file might cause other processes
+         * currently reading that file to fail, but linux' rename()
+         * seems to be smart enough to handle that for us.
+         */
+        if (Smarty::$_IS_WINDOWS) {
+            // remove original file
+            if (is_file($_filepath)) {
+                @unlink($_filepath);
+            }
+            // rename tmp file
+            $success = @rename($_tmp_file, $_filepath);
+        } else {
+            // rename tmp file
+            $success = @rename($_tmp_file, $_filepath);
+            if (!$success) {
+                // remove original file
+                if (is_file($_filepath)) {
+                    @unlink($_filepath);
+                }
+                // rename tmp file
+                $success = @rename($_tmp_file, $_filepath);
+            }
+        }
+        if (!$success) {
+            error_reporting($_error_reporting);
+            throw new SmartyException("unable to write file {$_filepath}");
+        }
+        // set file permissions
+        @chmod($_filepath, 0666 & ~umask());
+        error_reporting($_error_reporting);
+        return true;
+    }
+}