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[Qemu-devel] [PULL 09/18] tests: make docker.py check for persistent con

From: Alex Bennée
Subject: [Qemu-devel] [PULL 09/18] tests: make docker.py check for persistent configs
Date: Mon, 11 Feb 2019 13:04:58 +0000

binfmt_misc configured with the "F" flag opens the interpreter at
config time. This means it can use an already open file-descriptor to
run QEMU so there is no point trying to copy the binary into a

Signed-off-by: Alex Bennée <address@hidden>

diff --git a/tests/docker/docker.py b/tests/docker/docker.py
index 30f463af9f..768728785f 100755
--- a/tests/docker/docker.py
+++ b/tests/docker/docker.py
@@ -127,6 +127,11 @@ def _check_binfmt_misc(executable):
     with open(binfmt_entry) as x: entry = x.read()
+    if re.search("flags:.*F.*\n", entry):
+        print("binfmt_misc for %s uses persistent(F) mapping to host binary\n" 
+              (binary))
+        return None
     m = re.search("interpreter (\S+)\n", entry)
     interp = m.group(1)
     if interp and interp != executable:

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