[Qemu-ppc] [PATCH] Allow -sandbox off with --disable-seccomp

[David Gibson]

At present, when seccomp support is compiled out with --disable-seccomp
we fail with an error if the user puts -sandbox on the command line.

That kind of makes sense, but it's a bit strange that we reject a request
to disable sandboxing with "-sandbox off" saying we don't support
sandboxing.

This puts in a small sandbox to (correctly) silently ignore -sandbox off
when we don't have sandboxing support compiled in.  This makes life easier
for testcases, since they can safely specify "-sandbox off" without having
to care if the qemu they're using is compiled with sandbox support or not.

Signed-off-by: David Gibson <address@hidden>
---
 vl.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/vl.c b/vl.c
index 502857a176..9d5f1b7ebb 100644
--- a/vl.c
+++ b/vl.c
@@ -3857,9 +3857,11 @@ int main(int argc, char **argv, char **envp)
                     exit(1);
                 }
 #else
-                error_report("-sandbox support is not enabled "
-                             "in this QEMU binary");
-                exit(1);
+                if (!g_str_equal(optarg, "off")) {
+                    error_report("-sandbox support is not enabled "
+                                 "in this QEMU binary");
+                    exit(1);
+                }
 #endif
                 break;
             case QEMU_OPTION_add_fd:
-- 
2.20.1