[image] Allow image_set_cmdline() to clear the command line

Signed-off-by: Michael Brown <mcb30@ipxe.org>

diff --git a/src/core/image.c b/src/core/image.c
index cb9615311eeb2eebc97fc8905730e4c18497e13b..6caa0243480097cef1de2baf56e1fe8d586d3083 100644 (file)
--- a/src/core/image.c
+++ b/src/core/image.c
@@ -95,14 +95,18 @@ void image_set_uri ( struct image *image, struct uri *uri ) {
  * Set image command line
  *
  * @v image            Image
- * @v cmdline          New image command line
+ * @v cmdline          New image command line, or NULL
  * @ret rc             Return status code
  */
 int image_set_cmdline ( struct image *image, const char *cmdline ) {
+
        free ( image->cmdline );
-       image->cmdline = strdup ( cmdline );
-       if ( ! image->cmdline )
-               return -ENOMEM;
+       image->cmdline = NULL;
+       if ( cmdline ) {
+               image->cmdline = strdup ( cmdline );
+               if ( ! image->cmdline )
+                       return -ENOMEM;
+       }
        return 0;
 }