Commit d7b2679253504d6defa9fc7159b572cfd6a25a95 introduced a return value picking of qemu-img on '-h', but without any comment. --- src/storage/storage_backend.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/src/storage/storage_backend.c b/src/storage/storage_backend.c index c8e19c8..b423d11 100644 --- a/src/storage/storage_backend.c +++ b/src/storage/storage_backend.c @@ -628,6 +628,9 @@ static int virStorageBackendQEMUImgBackingFormat(const char *qemuimg) virCommandSetOutputBuffer(cmd, &help); virCommandClearCaps(cmd); + /* qemuimg doesn't return zero exit status on -h, + * therefore we need to provide pointer for storing + * exit status, although we don't parse it any later */ if (virCommandRun(cmd, &exitstatus) < 0) goto cleanup; -- 1.7.5.rc3