From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34079) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fhv1o-0007R3-Ad for qemu-devel@nongnu.org; Tue, 24 Jul 2018 06:58:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fhv1n-0000li-E6 for qemu-devel@nongnu.org; Tue, 24 Jul 2018 06:58:52 -0400 Received: from mail-wm0-x22c.google.com ([2a00:1450:400c:c09::22c]:54857) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fhv1n-0000lJ-7L for qemu-devel@nongnu.org; Tue, 24 Jul 2018 06:58:51 -0400 Received: by mail-wm0-x22c.google.com with SMTP id c14-v6so2072213wmb.4 for ; Tue, 24 Jul 2018 03:58:51 -0700 (PDT) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= Date: Tue, 24 Jul 2018 11:51:08 +0100 Message-Id: <20180724105109.8392-17-alex.bennee@linaro.org> In-Reply-To: <20180724105109.8392-1-alex.bennee@linaro.org> References: <20180724105109.8392-1-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [Qemu-devel] [PULL 16/17] docker: perform basic binfmt_misc validation in docker.py List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: peter.maydell@linaro.org Cc: qemu-devel@nongnu.org, =?UTF-8?q?Alex=20Benn=C3=A9e?= , Fam Zheng , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Setting up binfmt_misc is outside of the scope of the docker.py script but we can at least validate it with any given executable so we have a more useful error message than the sed line of deboostrap failing cryptically. Signed-off-by: Alex Bennée Reported-by: Richard Henderson diff --git a/tests/docker/docker.py b/tests/docker/docker.py index 2f81c6b13b..d3006d4dae 100755 --- a/tests/docker/docker.py +++ b/tests/docker/docker.py @@ -112,6 +112,31 @@ def _copy_binary_with_libs(src, dest_dir): so_path = os.path.dirname(l) _copy_with_mkdir(l , dest_dir, so_path) + +def _check_binfmt_misc(executable): + """Check binfmt_misc has entry for executable in the right place. + + The details of setting up binfmt_misc are outside the scope of + this script but we should at least fail early with a useful + message if it won't work.""" + + binary = os.path.basename(executable) + binfmt_entry = "/proc/sys/fs/binfmt_misc/%s" % (binary) + + if not os.path.exists(binfmt_entry): + print ("No binfmt_misc entry for %s" % (binary)) + return False + + with open(binfmt_entry) as x: entry = x.read() + + qpath = "/usr/bin/%s" % (binary) + if not re.search("interpreter %s\n" % (qpath), entry): + print ("binfmt_misc for %s does not point to %s" % (binary, qpath)) + return False + + return True + + def _read_qemu_dockerfile(img_name): # special case for Debian linux-user images if img_name.startswith("debian") and img_name.endswith("user"): @@ -315,6 +340,11 @@ class BuildCommand(SubCommand): # Create a docker context directory for the build docker_dir = tempfile.mkdtemp(prefix="docker_build") + # Validate binfmt_misc will work + if args.include_executable: + if not _check_binfmt_misc(args.include_executable): + return 1 + # Is there a .pre file to run in the build context? docker_pre = os.path.splitext(args.dockerfile)[0]+".pre" if os.path.exists(docker_pre): -- 2.17.1