diff --git a/src/os/unix/ngx_files.c b/src/os/unix/ngx_files.c
new file mode 100644
index 0000000..a3dc36d
--- /dev/null
+++ b/src/os/unix/ngx_files.c
@@ -0,0 +1,72 @@
+
+#include <ngx_core.h>
+#include <ngx_file.h>
+
+ssize_t ngx_read_file(ngx_file_t *file, char *buf, size_t size, off_t offset)
+{
+    ssize_t n;
+
+    ngx_log_debug(file->log, "read: %x, %d, %qd" _ buf _ size _ offset);
+
+    n = pread(file->fd, buf, size, offset);
+
+    if (n == NGX_ERROR)
+        ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno, "read() failed");
+
+    return n;
+}
+
+#if 0
+
+ssize_t ngx_read_file(ngx_file_t *file, char *buf, size_t size, off_t offset)
+{
+    if (!file->read->ready) {
+
+        ngx_memzero(&file->iocb, sizeof(iocb));
+        file->iocb.aio_fildes = file->fd;
+        file->iocb.aio_buf = buf;
+        file->iocb.aio_nbytes = size;
+        file->iocb.aio_offset = offset;
+#if (USE_AIO_KQUEUE)
+        file->iocb.aio_sigevent.sigev_notify = SIGEV_KEVENT;
+        file->iocb.aio_sigevent.sigev_notify_kqueue = tid->kq;
+        file->iocb.aio_sigevent.sigev_value = (union sigval) file;
+#endif
+#if (USE_AIO_SIGNAL)
+        file->iocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL;
+        file->iocb.aio_sigevent.sigev_signo = NGX_SIGAIO;
+#ifndef __FreeBSD__
+        file->iocb.aio_sigevent.sigev_value.sival_ptr = file;
+#endif
+#endif
+
+        if (aio_read(&file->iocb) == -1) {
+            ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno,
+                          "aio_read() failed");
+            return NGX_ERROR;
+
+        n = aio_error(&file->iocb);
+        if (n == EINPROGRESS)
+            return NGX_AGAIN;
+
+        if (n == -1) {
+            ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno,
+                          "aio_read() failed");
+            return NGX_ERROR;
+        }
+    }
+
+    ngx_assert(file->iocb.aio_buf == buf), return NGX_ERROR,
+               "ngx_aio_read_file: another buffer is passed");
+
+    n = aio_return(&file->iocb);
+    if (n == -1) {
+        ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno,
+                      "aio_read() failed");
+        return NGX_ERROR;
+    }
+
+    return n;
+}
+
+#endif