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+# This code is part of Ansible, but is an independent component.
+# This particular file snippet, and this file snippet only, is BSD licensed.
+# Modules you write using this snippet, which is embedded dynamically by Ansible
+# still belong to the author of the module, and may assign their own license
+# to the complete work.
+#
+# Copyright (c) Ansible Inc, 2016
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification,
+# are permitted provided that the following conditions are met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright notice,
+# this list of conditions and the following disclaimer in the documentation
+# and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import glob
+import os
+import pickle
+import platform
+import select
+import shlex
+import subprocess
+import traceback
+
+from ansible.module_utils.six import PY2, b
+from ansible.module_utils._text import to_bytes, to_text
+
+
+def sysv_is_enabled(name, runlevel=None):
+ '''
+ This function will check if the service name supplied
+ is enabled in any of the sysv runlevels
+
+ :arg name: name of the service to test for
+ :kw runlevel: runlevel to check (default: None)
+ '''
+ if runlevel:
+ if not os.path.isdir('/etc/rc0.d/'):
+ return bool(glob.glob('/etc/init.d/rc%s.d/S??%s' % (runlevel, name)))
+ return bool(glob.glob('/etc/rc%s.d/S??%s' % (runlevel, name)))
+ else:
+ if not os.path.isdir('/etc/rc0.d/'):
+ return bool(glob.glob('/etc/init.d/rc?.d/S??%s' % name))
+ return bool(glob.glob('/etc/rc?.d/S??%s' % name))
+
+
+def get_sysv_script(name):
+ '''
+ This function will return the expected path for an init script
+ corresponding to the service name supplied.
+
+ :arg name: name or path of the service to test for
+ '''
+ if name.startswith('/'):
+ result = name
+ else:
+ result = '/etc/init.d/%s' % name
+
+ return result
+
+
+def sysv_exists(name):
+ '''
+ This function will return True or False depending on
+ the existence of an init script corresponding to the service name supplied.
+
+ :arg name: name of the service to test for
+ '''
+ return os.path.exists(get_sysv_script(name))
+
+
+def get_ps(module, pattern):
+ '''
+ Last resort to find a service by trying to match pattern to programs in memory
+ '''
+ found = False
+ if platform.system() == 'SunOS':
+ flags = '-ef'
+ else:
+ flags = 'auxww'
+ psbin = module.get_bin_path('ps', True)
+
+ (rc, psout, pserr) = module.run_command([psbin, flags])
+ if rc == 0:
+ for line in psout.splitlines():
+ if pattern in line:
+ # FIXME: should add logic to prevent matching 'self', though that should be extremely rare
+ found = True
+ break
+ return found
+
+
+def fail_if_missing(module, found, service, msg=''):
+ '''
+ This function will return an error or exit gracefully depending on check mode status
+ and if the service is missing or not.
+
+ :arg module: is an AnsibleModule object, used for it's utility methods
+ :arg found: boolean indicating if services was found or not
+ :arg service: name of service
+ :kw msg: extra info to append to error/success msg when missing
+ '''
+ if not found:
+ module.fail_json(msg='Could not find the requested service %s: %s' % (service, msg))
+
+
+def fork_process():
+ '''
+ This function performs the double fork process to detach from the
+ parent process and execute.
+ '''
+ pid = os.fork()
+
+ if pid == 0:
+ # Set stdin/stdout/stderr to /dev/null
+ fd = os.open(os.devnull, os.O_RDWR)
+
+ # clone stdin/out/err
+ for num in range(3):
+ if fd != num:
+ os.dup2(fd, num)
+
+ # close otherwise
+ if fd not in range(3):
+ os.close(fd)
+
+ # Make us a daemon
+ pid = os.fork()
+
+ # end if not in child
+ if pid > 0:
+ os._exit(0)
+
+ # get new process session and detach
+ sid = os.setsid()
+ if sid == -1:
+ raise Exception("Unable to detach session while daemonizing")
+
+ # avoid possible problems with cwd being removed
+ os.chdir("/")
+
+ pid = os.fork()
+ if pid > 0:
+ os._exit(0)
+
+ return pid
+
+
+def daemonize(module, cmd):
+ '''
+ Execute a command while detaching as a daemon, returns rc, stdout, and stderr.
+
+ :arg module: is an AnsibleModule object, used for it's utility methods
+ :arg cmd: is a list or string representing the command and options to run
+
+ This is complex because daemonization is hard for people.
+ What we do is daemonize a part of this module, the daemon runs the command,
+ picks up the return code and output, and returns it to the main process.
+ '''
+
+ # init some vars
+ chunk = 4096 # FIXME: pass in as arg?
+ errors = 'surrogate_or_strict'
+
+ # start it!
+ try:
+ pipe = os.pipe()
+ pid = fork_process()
+ except OSError:
+ module.fail_json(msg="Error while attempting to fork: %s", exception=traceback.format_exc())
+ except Exception as exc:
+ module.fail_json(msg=to_text(exc), exception=traceback.format_exc())
+
+ # we don't do any locking as this should be a unique module/process
+ if pid == 0:
+ os.close(pipe[0])
+
+ # if command is string deal with py2 vs py3 conversions for shlex
+ if not isinstance(cmd, list):
+ if PY2:
+ cmd = shlex.split(to_bytes(cmd, errors=errors))
+ else:
+ cmd = shlex.split(to_text(cmd, errors=errors))
+
+ # make sure we always use byte strings
+ run_cmd = []
+ for c in cmd:
+ run_cmd.append(to_bytes(c, errors=errors))
+
+ # execute the command in forked process
+ p = subprocess.Popen(run_cmd, shell=False, stdout=subprocess.PIPE, stderr=subprocess.PIPE, preexec_fn=lambda: os.close(pipe[1]))
+ fds = [p.stdout, p.stderr]
+
+ # loop reading output till its done
+ output = {p.stdout: b(""), p.stderr: b("")}
+ while fds:
+ rfd, wfd, efd = select.select(fds, [], fds, 1)
+ if (rfd + wfd + efd) or p.poll():
+ for out in list(fds):
+ if out in rfd:
+ data = os.read(out.fileno(), chunk)
+ if not data:
+ fds.remove(out)
+ output[out] += b(data)
+
+ # even after fds close, we might want to wait for pid to die
+ p.wait()
+
+ # Return a pickled data of parent
+ return_data = pickle.dumps([p.returncode, to_text(output[p.stdout]), to_text(output[p.stderr])], protocol=pickle.HIGHEST_PROTOCOL)
+ os.write(pipe[1], to_bytes(return_data, errors=errors))
+
+ # clean up
+ os.close(pipe[1])
+ os._exit(0)
+
+ elif pid == -1:
+ module.fail_json(msg="Unable to fork, no exception thrown, probably due to lack of resources, check logs.")
+
+ else:
+ # in parent
+ os.close(pipe[1])
+ os.waitpid(pid, 0)
+
+ # Grab response data after child finishes
+ return_data = b("")
+ while True:
+ rfd, wfd, efd = select.select([pipe[0]], [], [pipe[0]])
+ if pipe[0] in rfd:
+ data = os.read(pipe[0], chunk)
+ if not data:
+ break
+ return_data += b(data)
+
+ # Note: no need to specify encoding on py3 as this module sends the
+ # pickle to itself (thus same python interpreter so we aren't mixing
+ # py2 and py3)
+ return pickle.loads(to_bytes(return_data, errors=errors))
+
+
+def check_ps(module, pattern):
+
+ # Set ps flags
+ if platform.system() == 'SunOS':
+ psflags = '-ef'
+ else:
+ psflags = 'auxww'
+
+ # Find ps binary
+ psbin = module.get_bin_path('ps', True)
+
+ (rc, out, err) = module.run_command('%s %s' % (psbin, psflags))
+ # If rc is 0, set running as appropriate
+ if rc == 0:
+ for line in out.split('\n'):
+ if pattern in line:
+ return True
+ return False