Bundle libseccomp 2.3.1

[linux-seccomp.git] / libseccomp / tests / util.py

diff --git a/libseccomp/tests/util.py b/libseccomp/tests/util.py
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+#
+# Seccomp Library utility code for tests
+#
+# Copyright (c) 2012 Red Hat <pmoore@redhat.com>
+# Author: Paul Moore <paul@paul-moore.com>
+#
+
+#
+# This library is free software; you can redistribute it and/or modify it
+# under the terms of version 2.1 of the GNU Lesser General Public License as
+# published by the Free Software Foundation.
+#
+# This library is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+# for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library; if not, see <http://www.gnu.org/licenses>.
+#
+
+""" Python utility code for the libseccomp test suite """
+
+import argparse
+import os
+import sys
+import signal
+
+from seccomp import *
+
+def trap_handler(signum, frame):
+    """ SIGSYS signal handler, internal use only
+    """
+    os._exit(161)
+
+def get_opt():
+    """ Parse the arguments passed to main
+
+    Description:
+    Parse the arguments passed to the test from the command line.  Returns
+    a parsed argparse object.
+    """
+    parser = argparse.ArgumentParser()
+    parser.add_argument("-b", "--bpf", action="store_true")
+    parser.add_argument("-p", "--pfc", action="store_true")
+    return parser.parse_args()
+
+def filter_output(args, ctx):
+    """ Output the filter in either BPF or PFC
+
+    Arguments:
+    args - an argparse object from UtilGetOpt()
+    ctx - a seccomp SyscallFilter object
+
+    Description:
+    Output the SyscallFilter to stdout in either BPF or PFC format depending
+    on the test's command line arguments.
+    """
+    if (args.bpf):
+        ctx.export_bpf(sys.stdout)
+    else:
+        ctx.export_pfc(sys.stdout)
+
+def install_trap():
+    """ Install a TRAP action signal handler
+
+    Description:
+    Install the TRAP action signal handler.
+    """
+    signal.signal(signal.SIGSYS, trap_handler)
+
+def parse_action(action):
+    """ Parse a filter action string into an action value
+
+    Arguments:
+    action - the action string
+
+    Description:
+    Parse a seccomp action string into the associated integer value.
+    """
+    if action == "KILL":
+        return KILL
+    elif action == "TRAP":
+        return TRAP
+    elif action == "ERRNO":
+        return ERRNO(163)
+    elif action == "TRACE":
+        raise RuntimeError("the TRACE action is not currently supported")
+    elif action == "ALLOW":
+        return ALLOW
+    raise RuntimeError("invalid action string")
+
+
+def write_file(path):
+    """ Write a string to a file
+
+    Arguments:
+    path - the file path
+
+    Description:
+    Open the specified file, write a string to the file, and close the file.
+    """
+    fd = os.open(path, os.O_WRONLY|os.O_CREAT, 0600)
+    if not os.write(fd, "testing") == len("testing"):
+        raise IOError("failed to write the full test string in write_file()")
+    os.close(fd)
+
+# kate: syntax python;
+# kate: indent-mode python; space-indent on; indent-width 4; mixedindent off;