1# Copyright (c) 2010, 2011 Nicira, Inc. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at: 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14 15import os 16import signal 17 18 19def _signal_status_msg(type_, signr): 20 s = "%s by signal %d" % (type_, signr) 21 for name in signal.__dict__: 22 if name.startswith("SIG") and getattr(signal, name) == signr: 23 return "%s (%s)" % (s, name) 24 return s 25 26 27def status_msg(status): 28 """Given 'status', which is a process status in the form reported by 29 waitpid(2) and returned by process_status(), returns a string describing 30 how the process terminated.""" 31 if os.WIFEXITED(status): 32 s = "exit status %d" % os.WEXITSTATUS(status) 33 elif os.WIFSIGNALED(status): 34 s = _signal_status_msg("killed", os.WTERMSIG(status)) 35 elif os.WIFSTOPPED(status): 36 s = _signal_status_msg("stopped", os.WSTOPSIG(status)) 37 else: 38 s = "terminated abnormally (%x)" % status 39 if os.WCOREDUMP(status): 40 s += ", core dumped" 41 return s 42