X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=daemon%2Fswap.c;h=c2fe13aee60b5c815bb80ecc68ad314cb6e14262;hb=1e35941f62bddafd6b88270b22b3afe4a5d37baa;hp=99fb5639d83aa3e9bb41c074bf64118f3c3b9213;hpb=f5096dd546ac43c7288b3ab7aec1562f070f78f6;p=libguestfs.git

diff --git a/daemon/swap.c b/daemon/swap.c
index 99fb563..c2fe13a 100644
--- a/daemon/swap.c
+++ b/daemon/swap.c
@@ -43,8 +43,13 @@ optgroup_linuxfsuuid_available (void)
   char *err;
   int av;
 
-  /* Ignore return code - mkswap --help *will* fail. */
-  ignore_value (command (NULL, &err, "mkswap", "--help", NULL));
+  /* Upstream util-linux have been gradually changing '--help' to go
+   * from stderr to stdout, and changing the return code from 1 to 0.
+   * Thus we need to fold stdout and stderr together, and ignore the
+   * return code.
+   */
+  ignore_value (commandf (NULL, &err, COMMAND_FLAG_FOLD_STDOUT_ON_STDERR,
+                          "mkswap", "--help", NULL));
 
   av = strstr (err, "-U") != NULL;
   free (err);