+ free (*kernel);
+ free (*initrd);
+ *kernel = *initrd = NULL;
+ return -1;
+ }
+
+ return 0;
+}
+
+static int read_all (guestfs_h *g, FILE *fp, char **ret);
+
+/* Test qemu binary (or wrapper) runs, and do 'qemu -help' and
+ * 'qemu -version' so we know what options this qemu supports and
+ * the version.
+ */
+static int
+test_qemu (guestfs_h *g)
+{
+ char cmd[1024];
+ FILE *fp;
+
+ free (g->qemu_help);
+ free (g->qemu_version);
+ g->qemu_help = NULL;
+ g->qemu_version = NULL;
+
+ snprintf (cmd, sizeof cmd, "'%s' -help", g->qemu);
+
+ fp = popen (cmd, "r");
+ /* qemu -help should always work (qemu -version OTOH wasn't
+ * supported by qemu 0.9). If this command doesn't work then it
+ * probably indicates that the qemu binary is missing.
+ */
+ if (!fp) {
+ /* XXX This error is never printed, even if the qemu binary
+ * doesn't exist. Why?
+ */
+ error:
+ perrorf (g, _("%s: command failed: If qemu is located on a non-standard path, try setting the LIBGUESTFS_QEMU environment variable."), cmd);