new file mode 100644
--- /dev/null
+++ b/src/core/ngx_file.c
@@ -0,0 +1,140 @@
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_hunk.h>
+#include <ngx_array.h>
+#include <ngx_file.h>
+#include <ngx_files.h>
+
+
+int ngx_create_temp_file(ngx_file_t *file, ngx_path_t *path,
+                         ngx_pool_t *pool, int num, int step, int persistent)
+{
+    int        i;
+    ngx_err_t  err;
+
+    file->name.len = path->name.len + 1 + path->len + 10;
+
+    ngx_test_null(file->name.data, ngx_palloc(pool, file->name.len + 1),
+                  NGX_ERROR);
+
+#if 0
+    for (i = 0; i < file->name.len; i++) {
+         file->name.data[i] = 'X';
+    }
+#endif
+
+    ngx_memcpy(file->name.data, path->name.data, path->name.len);
+
+    for ( ;; ) {
+        snprintf(file->name.data + path->name.len + 1 + path->len, 11,
+                 "%010d", num);
+
+        ngx_create_hashed_filename(file, path);
+
+#if 0
+#if (WIN32)
+        file->fd = CreateFile(file->name.data,
+                        GENERIC_READ|GENERIC_WRITE,
+                        FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,
+                        NULL,
+                        CREATE_NEW,
+                        persistent ? 0:
+                            FILE_ATTRIBUTE_TEMPORARY|FILE_FLAG_DELETE_ON_CLOSE,
+                        NULL);
+#else
+        file->fd = open(file->name.data, O_CREAT|O_EXCL|O_WRONLY, 0600);
+#endif
+#endif
+
+        file->fd = ngx_open_tempfile(file->name.data, persistent);
+
+        if (file->fd != NGX_INVALID_FILE) {
+            return NGX_OK;
+        }
+
+        err = ngx_errno;
+
+        if (err == NGX_EEXIST) {
+            num *= step;
+            continue;
+        }
+
+        if (err != NGX_ENOENT
+#if (WIN32_NEED_TEST)
+            && err != NGX_ENOTDIR
+#endif
+        ) {
+            ngx_log_error(NGX_LOG_CRIT, file->log, err,
+                          ngx_open_tempfile_n " \"%s\" failed",
+                          file->name.data);
+            return NGX_ERROR;
+        }
+
+        if (ngx_create_path(file, path) == NGX_ERROR) {
+            return NGX_ERROR;
+        }        
+    }
+}
+
+
+void ngx_create_hashed_filename(ngx_file_t *file, ngx_path_t *path)
+{
+    int        i, name, pos, level;
+
+    name = file->name.len;
+    pos = path->name.len + 1;
+
+    file->name.data[path->name.len + path->len]  = '/';
+
+    for (i = 0; i < 3; i++) {
+        level = path->level[i];
+
+        if (level == 0) {
+            break;
+        }
+
+        ngx_log_debug(file->log, "temp: %s" _ file->name.data);
+
+        name -= level;
+        file->name.data[pos - 1] = '/';
+        ngx_memcpy(&file->name.data[pos], &file->name.data[name], level);
+        pos += level + 1;
+    }
+
+    ngx_log_debug(file->log, "temp: %s" _ file->name.data);
+}
+
+
+int ngx_create_path(ngx_file_t *file, ngx_path_t *path)
+{
+    int        i, pos;
+    ngx_err_t  err;
+
+    pos = path->name.len;
+
+    for (i = 0; i < 3; i++) {
+        if (path->level[i] == 0) {
+            break;
+        }
+
+        pos += path->level[i] + 1;
+
+        file->name.data[pos] = '\0';
+
+        ngx_log_debug(file->log, "temp: %s" _ file->name.data);
+
+        if (ngx_mkdir(file->name.data) == NGX_FILE_ERROR) {
+            err = ngx_errno;
+            if (err != NGX_EEXIST) {
+                ngx_log_error(NGX_LOG_CRIT, file->log, err,
+                              ngx_mkdir_n " \"%s\" failed", file->name.data);
+                return NGX_ERROR;
+            }
+        }
+
+        file->name.data[pos] = '/';
+    }
+
+    return NGX_OK;
+}