[Libguestfs] [PATCH] v2v: bootloaders: handle no default grubby kernel (RHBZ#1519204)

When using grubby to get the default kernel of a guest, do not fail with a bogus error like: virt-v2v: error: libguestfs error: statns: statns_stub: path must start with a / character in case there is no default kernel that can be determined (e.g. because of a bogus configuration). --- v2v/linux_bootloaders.ml | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/v2v/linux_bootloaders.ml b/v2v/linux_bootloaders.ml index 8de3f0469..b820f731f 100644 --- a/v2v/linux_bootloaders.ml +++ b/v2v/linux_bootloaders.ml @@ -239,7 +239,10 @@ object (self) let res = match get_default_method with | MethodGrubby -> - Some (g#command [| "grubby"; "--default-kernel" |]) + let res = g#command [| "grubby"; "--default-kernel" |] in + (match res with + | "" -> None + | _ -> Some res) | MethodPerlBootloader -> let cmd = [| "/usr/bin/perl"; "-MBootloader::Tools"; "-e"; " -- 2.14.3