import: support importing qcow2 images

With this change the import tool will now unpack qcow2 images into
normal raw disk images, suitable for usage with nspawn.

This allows has the benefit of also allowing importing Ubuntu Cloud
images for usage with nspawn.

1 files changed, 55 insertions, 0 deletions

diff --git a/src/import/test-qcow2.c b/src/import/test-qcow2.c
new file mode 100644
index 0000000000..9a6c3e8b35
--- /dev/null
+++ b/src/import/test-qcow2.c
@@ -0,0 +1,55 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2015 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "log.h"
+#include "util.h"
+
+#include "qcow2-util.h"
+
+int main(int argc, char *argv[]) {
+        _cleanup_close_ int sfd = -1, dfd = -1;
+        int r;
+
+        if (argc != 3) {
+                log_error("Needs two arguments.");
+                return EXIT_FAILURE;
+        }
+
+        sfd = open(argv[1], O_RDONLY|O_CLOEXEC|O_NOCTTY);
+        if (sfd < 0) {
+                log_error_errno(errno, "Can't open source file: %m");
+                return EXIT_FAILURE;
+        }
+
+        dfd = open(argv[2], O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0666);
+        if (dfd < 0) {
+                log_error_errno(errno, "Can't open destination file: %m");
+                return EXIT_FAILURE;
+        }
+
+        r = qcow2_convert(sfd, dfd);
+        if (r < 0) {
+                log_error_errno(r, "Failed to unpack: %m");
+                return EXIT_FAILURE;
+        }
+
+        return EXIT_SUCCESS;
+}