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#!/usr/bin/env python3
# -*- mode:python -*-
# vim: ts=4 sw=4 smarttab expandtab
#
# Processed in Makefile to add python #! line and version variable
#
#


"""
ceph.in becomes ceph, the command-line management tool for Ceph clusters.
This is a replacement for tools/ceph.cc and tools/common.cc.

Copyright (C) 2013 Inktank Storage, Inc.

This is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public
License version 2, as published by the Free Software
Foundation.  See file COPYING.
"""

from __future__ import print_function
from time import sleep
import codecs
import grp
import os
import pwd
import sys
import time
import platform

try:
    input = raw_input
except NameError:
    pass

CEPH_GIT_VER = "8a82819d84cf884bd39c17e3236e0632ac146dc4"
CEPH_GIT_NICE_VER = "15.2.17"
CEPH_RELEASE = "15"
CEPH_RELEASE_NAME = "octopus"
CEPH_RELEASE_TYPE = "stable"

# priorities from src/common/perf_counters.h
PRIO_CRITICAL = 10
PRIO_INTERESTING = 8
PRIO_USEFUL = 5
PRIO_UNINTERESTING = 2
PRIO_DEBUGONLY = 0

PRIO_DEFAULT = PRIO_INTERESTING

# Make life easier on developers:
# If our parent dir contains CMakeCache.txt and bin/init-ceph,
# assume we're running from a build dir (i.e. src/build/bin/ceph)
# and tweak sys.path and LD_LIBRARY_PATH to use built files.
# Since this involves re-execing, if CEPH_DBG is set in the environment
# re-exec with -mpdb.  Also, if CEPH_DEV is in the env, suppress
# the warning message about the DEVELOPER MODE.

MYPATH = os.path.abspath(__file__)
MYDIR = os.path.dirname(MYPATH)
MYPDIR = os.path.dirname(MYDIR)
DEVMODEMSG = '*** DEVELOPER MODE: setting PATH, PYTHONPATH and LD_LIBRARY_PATH ***'


def respawn_in_path(lib_path, pybind_path, pythonlib_path, asan_lib_path):
    execv_cmd = []
    if 'CEPH_DBG' in os.environ:
        execv_cmd += ['/usr/bin/python3.8', '-mpdb']

    if platform.system() == "Darwin":
        lib_path_var = "DYLD_LIBRARY_PATH"
    else:
        lib_path_var = "LD_LIBRARY_PATH"

    execv_cmd += sys.argv
    if asan_lib_path:
        os.environ['LD_PRELOAD'] = asan_lib_path
    if lib_path_var in os.environ:
        if lib_path not in os.environ[lib_path_var]:
            os.environ[lib_path_var] += ':' + lib_path
            if "CEPH_DEV" not in os.environ:
                print(DEVMODEMSG, file=sys.stderr)
            os.execvp(execv_cmd[0], execv_cmd)
    else:
        os.environ[lib_path_var] = lib_path
        if "CEPH_DEV" not in os.environ:
            print(DEVMODEMSG, file=sys.stderr)
        os.execvp(execv_cmd[0], execv_cmd)
    sys.path.insert(0, os.path.join(MYDIR, pybind_path))
    sys.path.insert(0, os.path.join(MYDIR, pythonlib_path))


def get_pythonlib_dir():
    """Returns the name of a distutils build directory"""
    return "lib.{version[0]}".format(version=sys.version_info)


def get_cmake_variables(*names):
    vars = dict((name, None) for name in names)
    for line in open(os.path.join(MYPDIR, "CMakeCache.txt")):
        # parse lines like "WITH_ASAN:BOOL=ON"
        for name in names:
            if line.startswith("{}:".format(name)):
                type_value = line.split(":")[1].strip()
                t, v = type_value.split("=")
                if t == 'BOOL':
                    v = v.upper() in ('TRUE', '1', 'Y', 'YES', 'ON')
                vars[name] = v
                break
        if all(vars.values()):
            break
    return [vars[name] for name in names]


if os.path.exists(os.path.join(MYPDIR, "CMakeCache.txt")) \
     and os.path.exists(os.path.join(MYPDIR, "bin/init-ceph")):
    src_path, with_asan, asan_lib_path = \
        get_cmake_variables("ceph_SOURCE_DIR", "WITH_ASAN", "ASAN_LIBRARY")
    if src_path is None:
        # Huh, maybe we're not really in a cmake environment?
        pass
    else:
        # Developer mode, but in a cmake build dir instead of the src dir
        lib_path = os.path.join(MYPDIR, "lib")
        bin_path = os.path.join(MYPDIR, "bin")
        pybind_path = os.path.join(src_path, "src", "pybind")
        pythonlib_path = os.path.join(lib_path,
                                      "cython_modules",
                                      get_pythonlib_dir())
        respawn_in_path(lib_path, pybind_path, pythonlib_path,
                        asan_lib_path if with_asan else None)

        if 'PATH' in os.environ and bin_path not in os.environ['PATH']:
            os.environ['PATH'] = os.pathsep.join([bin_path, os.environ['PATH']])

import argparse
import errno
import json
import rados
import shlex
import signal
import string
import subprocess

from ceph_argparse import \
    concise_sig, descsort_key, parse_json_funcsigs, \
    validate_command, find_cmd_target, \
    json_command, run_in_thread, Flag

from ceph_daemon import admin_socket, DaemonWatcher, Termsize

# just a couple of globals

verbose = False
cluster_handle = None

# Always use Unicode (UTF-8) for stdout
if sys.version_info[0] >= 3:
    raw_stdout = sys.stdout.buffer
    raw_stderr = sys.stderr.buffer
else:
    raw_stdout = sys.__stdout__
    raw_stderr = sys.__stderr__
    sys.stdout = codecs.getwriter('utf-8')(raw_stdout)
    sys.stderr = codecs.getwriter('utf-8')(raw_stderr)


def raw_write(buf):
    sys.stdout.flush()
    raw_stdout.write(rados.cstr(buf, ''))


def osdids():
    ret, outbuf, outs = json_command(cluster_handle, prefix='osd ls')
    if ret:
        raise RuntimeError('Can\'t contact mon for osd list')
    return [line.decode('utf-8') for line in outbuf.split(b'\n') if line]


def monids():
    ret, outbuf, outs = json_command(cluster_handle, prefix='mon dump',
                                     argdict={'format': 'json'})
    if ret:
        raise RuntimeError('Can\'t contact mon for mon list')
    d = json.loads(outbuf.decode('utf-8'))
    return [m['name'] for m in d['mons']]


def mdsids():
    ret, outbuf, outs = json_command(cluster_handle, prefix='fs dump',
                                     argdict={'format': 'json'})
    if ret:
        raise RuntimeError('Can\'t contact mon for mds list')
    d = json.loads(outbuf.decode('utf-8'))
    l = []
    for info in d['standbys']:
        l.append(info['name'])
    for fs in d['filesystems']:
        for info in fs['mdsmap']['info'].values():
            l.append(info['name'])
    return l


def mgrids():
    ret, outbuf, outs = json_command(cluster_handle, prefix='mgr dump',
                                     argdict={'format': 'json'})
    if ret:
        raise RuntimeError('Can\'t contact mon for mgr list')

    d = json.loads(outbuf.decode('utf-8'))
    l = []
    l.append(d['active_name'])
    # we can only send tell commands to the active mgr
    #for i in d['standbys']:
    #    l.append(i['name'])
    return l


def ids_by_service(service):
    ids = {"mon": monids,
           "osd": osdids,
           "mds": mdsids,
           "mgr": mgrids}
    return ids[service]()


def validate_target(target):
    """
      this function will return true iff target is a correct
      target, such as mon.a/osd.2/mds.a/mgr.

      target: array, likes ['osd', '2']
      return: bool, or raise RuntimeError
    """

    if len(target) == 2:
        # for case "service.id"
        service_name, service_id = target[0], target[1]
        try:
            exist_ids = ids_by_service(service_name)
        except KeyError:
            print('WARN: {0} is not a legal service name, should be one of mon/osd/mds/mgr'.format(service_name),
                  file=sys.stderr)
            return False

        if service_id in exist_ids or len(exist_ids) > 0 and service_id == '*':
            return True
        else:
            print('WARN: the service id you provided does not exist. service id should '
                  'be one of {0}.'.format('/'.join(exist_ids)), file=sys.stderr)
            return False

    elif len(target) == 1 and target[0] in ['mgr', 'mon']:
        return True
    else:
        print('WARN: \"{0}\" is not a legal target. it should be one of mon.<id>/osd.<int>/mds.<id>/mgr'.format('.'.join(target)), file=sys.stderr)
        return False


# these args must be passed to all child programs
GLOBAL_ARGS = {
    'client_id': '--id',
    'client_name': '--name',
    'cluster': '--cluster',
    'cephconf': '--conf',
}


def parse_cmdargs(args=None, target=''):
    """
    Consume generic arguments from the start of the ``args``
    list.  Call this first to handle arguments that are not
    handled by a command description provided by the server.

    :returns: three tuple of ArgumentParser instance, Namespace instance
              containing parsed values, and list of un-handled arguments
    """
    # alias: let the line-wrapping be sane
    AP = argparse.ArgumentParser

    # format our own help
    parser = AP(description='Ceph administration tool', add_help=False)

    parser.add_argument('--completion', action='store_true',
                        help=argparse.SUPPRESS)

    parser.add_argument('-h', '--help', help='request mon help',
                        action='store_true')

    parser.add_argument('-c', '--conf', dest='cephconf',
                        help='ceph configuration file')
    parser.add_argument('-i', '--in-file', dest='input_file',
                        help='input file, or "-" for stdin')
    parser.add_argument('-o', '--out-file', dest='output_file',
                        help='output file, or "-" for stdout')
    parser.add_argument('--setuser', dest='setuser',
                        help='set user file permission')
    parser.add_argument('--setgroup', dest='setgroup',
                        help='set group file permission')
    parser.add_argument('--id', '--user', dest='client_id',
                        help='client id for authentication')
    parser.add_argument('--name', '-n', dest='client_name',
                        help='client name for authentication')
    parser.add_argument('--cluster', help='cluster name')

    parser.add_argument('--admin-daemon', dest='admin_socket',
                        help='submit admin-socket commands (\"help\" for help')

    parser.add_argument('-s', '--status', action='store_true',
                        help='show cluster status')

    parser.add_argument('-w', '--watch', action='store_true',
                        help='watch live cluster changes')
    parser.add_argument('--watch-debug', action='store_true',
                        help='watch debug events')
    parser.add_argument('--watch-info', action='store_true',
                        help='watch info events')
    parser.add_argument('--watch-sec', action='store_true',
                        help='watch security events')
    parser.add_argument('--watch-warn', action='store_true',
                        help='watch warn events')
    parser.add_argument('--watch-error', action='store_true',
                        help='watch error events')

    parser.add_argument('-W', '--watch-channel', dest="watch_channel",
                        help="watch live cluster changes on a specific channel "
                        "(e.g., cluster, audit, cephadm, or '*' for all)")

    parser.add_argument('--version', '-v', action="store_true", help="display version")
    parser.add_argument('--verbose', action="store_true", help="make verbose")
    parser.add_argument('--concise', dest='verbose', action="store_false",
                        help="make less verbose")

    parser.add_argument('-f', '--format', choices=['json', 'json-pretty',
                        'xml', 'xml-pretty', 'plain', 'yaml'], dest='output_format')

    parser.add_argument('--connect-timeout', dest='cluster_timeout',
                        type=int,
                        help='set a timeout for connecting to the cluster')

    parser.add_argument('--block', action='store_true',
                        help='block until completion (scrub and deep-scrub only)')
    parser.add_argument('--period', '-p', default=1, type=float,
                        help='polling period, default 1.0 second (for ' \
                        'polling commands only)')

    # returns a Namespace with the parsed args, and a list of all extras
    parsed_args, extras = parser.parse_known_args(args)

    return parser, parsed_args, extras


def hdr(s):
    print('\n', s, '\n', '=' * len(s))


def do_basic_help(parser, args):
    """
    Print basic parser help
    If the cluster is available, get and print monitor help
    """
    hdr('General usage:')
    parser.print_help()
    print_locally_handled_command_help()


def print_locally_handled_command_help():
    hdr("Local commands:")
    print("""
ping <mon.id>           Send simple presence/life test to a mon
                        <mon.id> may be 'mon.*' for all mons
daemon {type.id|path} <cmd>
                        Same as --admin-daemon, but auto-find admin socket
daemonperf {type.id | path} [stat-pats] [priority] [<interval>] [<count>]
daemonperf {type.id | path} list|ls [stat-pats] [priority]
                        Get selected perf stats from daemon/admin socket
                        Optional shell-glob comma-delim match string stat-pats
                        Optional selection priority (can abbreviate name):
                         critical, interesting, useful, noninteresting, debug
                        List shows a table of all available stats
                        Run <count> times (default forever),
                         once per <interval> seconds (default 1)
    """, file=sys.stdout)


def do_extended_help(parser, args, target, partial):
    def help_for_sigs(sigs, partial=None):
        try:
            sys.stdout.write(format_help(parse_json_funcsigs(sigs, 'cli'),
                             partial=partial))
        except BrokenPipeError:
            pass

    def help_for_target(target, partial=None):
        # wait for osdmap because we know this is sent after the mgrmap
        # and monmap (it's alphabetical).
        cluster_handle.wait_for_latest_osdmap()
        ret, outbuf, outs = json_command(cluster_handle, target=target,
                                         prefix='get_command_descriptions',
                                         timeout=10)
        if ret:
            if (ret == -errno.EPERM or ret == -errno.EACCES) and target[0] in ('osd', 'mds'):
                print("Permission denied.  Check that your user has 'allow *' "
                      "capabilities for the target daemon type.", file=sys.stderr)
            elif ret == -errno.EPERM:
                print("Permission denied.  Check your user has proper "
                      "capabilities configured", file=sys.stderr)
            else:
                print("couldn't get command descriptions for {0}: {1} ({2})".
                      format(target, outs, ret), file=sys.stderr)
            return ret
        else:
            return help_for_sigs(outbuf.decode('utf-8'), partial)

    assert(cluster_handle.state == "connected")
    return help_for_target(target, partial)

DONTSPLIT = string.ascii_letters + '{[<>]}'


def wrap(s, width, indent):
    """
    generator to transform s into a sequence of strings width or shorter,
    for wrapping text to a specific column width.
    Attempt to break on anything but DONTSPLIT characters.
    indent is amount to indent 2nd-through-nth lines.

    so "long string long string long string" width=11 indent=1 becomes
    'long string', ' long string', ' long string' so that it can be printed
    as
    long string
     long string
     long string

    Consumes s.
    """
    result = ''
    leader = ''
    while len(s):

        if len(s) <= width:
            # no splitting; just possibly indent
            result = leader + s
            s = ''
            yield result

        else:
            splitpos = width
            while (splitpos > 0) and (s[splitpos-1] in DONTSPLIT):
                splitpos -= 1

            if splitpos == 0:
                splitpos = width

            if result:
                # prior result means we're mid-iteration, indent
                result = leader
            else:
                # first time, set leader and width for next
                leader = ' ' * indent
                width -= 1      # for subsequent space additions

            # remove any leading spaces in this chunk of s
            result += s[:splitpos].lstrip()
            s = s[splitpos:]

            yield result


def format_help(cmddict, partial=None):
    """
    Formats all the cmdsigs and helptexts from cmddict into a sorted-by-
    cmdsig 2-column display, with each column wrapped and indented to
    fit into (terminal_width / 2) characters.
    """

    fullusage = ''
    for cmd in sorted(cmddict.values(), key=descsort_key):

        if not cmd['help']:
            continue
        flags = cmd.get('flags', 0)
        if flags & (Flag.OBSOLETE | Flag.DEPRECATED | Flag.HIDDEN):
            continue
        concise = concise_sig(cmd['sig'])
        if partial and not concise.startswith(partial):
            continue
        width = Termsize().cols - 1  # 1 for the line between sig and help
        sig_width = int(width / 2)
        # make sure width == sig_width + help_width, even (width % 2 > 0)
        help_width = int(width / 2) + (width % 2)
        siglines = [l for l in wrap(concise, sig_width, 1)]
        helplines = [l for l in wrap(cmd['help'], help_width, 1)]

        # make lists the same length
        maxlen = max(len(siglines), len(helplines))
        siglines.extend([''] * (maxlen - len(siglines)))
        helplines.extend([''] * (maxlen - len(helplines)))

        # so we can zip them for output
        for s, h in zip(siglines, helplines):
            fullusage += '{s:{w}s} {h}\n'.format(s=s, h=h, w=sig_width)

    return fullusage


def ceph_conf(parsed_args, field, name):
    args = ['ceph-conf']

    if name:
        args.extend(['--name', name])

    # add any args in GLOBAL_ARGS
    for key, val in GLOBAL_ARGS.items():
        # ignore name in favor of argument name, if any
        if name and key == 'client_name':
            continue
        if getattr(parsed_args, key):
            args.extend([val, getattr(parsed_args, key)])

    args.extend(['--show-config-value', field])
    p = subprocess.Popen(
        args,
        stdout=subprocess.PIPE,
        stderr=subprocess.PIPE)
    outdata, errdata = p.communicate()
    if p.returncode != 0:
        raise RuntimeError('unable to get conf option %s for %s: %s' % (field, name, errdata))
    return outdata.rstrip()

PROMPT = 'ceph> '

if sys.stdin.isatty():
    def read_input():
        while True:
            line = input(PROMPT).rstrip()
            if line in ['q', 'quit', 'Q', 'exit']:
                return None
            if line:
                return line
else:
    def read_input():
        while True:
            line = sys.stdin.readline()
            if not line:
                return None
            line = line.rstrip()
            if line:
                return line


def do_command(parsed_args, target, cmdargs, sigdict, inbuf, verbose):
    ''' Validate a command, and handle the polling flag '''

    valid_dict = validate_command(sigdict, cmdargs, verbose)
    # Validate input args against list of sigs
    if valid_dict:
        if parsed_args.output_format:
            valid_dict['format'] = parsed_args.output_format
        if verbose:
            print("Submitting command: ", valid_dict, file=sys.stderr)
    else:
        return -errno.EINVAL, '', 'invalid command'

    next_header_print = 0
    # Set extra options for polling commands only:
    if valid_dict.get('poll', False):
        valid_dict['width'] = Termsize().cols
    while True:
        try:
            # Only print the header for polling commands
            if next_header_print == 0 and valid_dict.get('poll', False):
                valid_dict['print_header'] = True
                next_header_print = Termsize().rows - 3
            next_header_print -= 1
            ret, outbuf, outs = json_command(cluster_handle, target=target,
                argdict=valid_dict, inbuf=inbuf, verbose=verbose)
            if valid_dict.get('poll', False):
                valid_dict['print_header'] = False
            if not valid_dict.get('poll', False):
                # Don't print here if it's not a polling command
                break
            if ret:
                ret = abs(ret)
                print('Error: {0} {1}'.format(ret, errno.errorcode.get(ret, 'Unknown')),
                        file=sys.stderr)
                break
            if outbuf:
                print(outbuf.decode('utf-8'))
            if outs:
                print(outs, file=sys.stderr)
            if parsed_args.period <= 0:
                break
            sleep(parsed_args.period)
        except KeyboardInterrupt:
            print('Interrupted')
            return errno.EINTR, '', ''
    if ret == errno.ETIMEDOUT:
        ret = -ret
        if not outs:
            outs = ("Connection timed out. Please check the client's " +
                    "permission and connection.")
    return ret, outbuf, outs


def new_style_command(parsed_args, cmdargs, target, sigdict, inbuf, verbose):
    """
    Do new-style command dance.
    target: daemon to receive command: mon (any) or osd.N
    sigdict - the parsed output from the new monitor describing commands
    inbuf - any -i input file data
    verbose - bool
    """
    if verbose:
        for cmdtag in sorted(sigdict.keys()):
            cmd = sigdict[cmdtag]
            sig = cmd['sig']
            print('{0}: {1}'.format(cmdtag, concise_sig(sig)))

    if True:
        if cmdargs:
            # Non interactive mode
            ret, outbuf, outs = do_command(parsed_args, target, cmdargs, sigdict, inbuf, verbose)
        else:
            # Interactive mode (ceph cli)
            if sys.stdin.isatty():
                # do the command-interpreter looping
                # for input to do readline cmd editing
                import readline  # noqa

            while True:
                try:
                    interactive_input = read_input()
                except EOFError:
                    # leave user an uncluttered prompt
                    return 0, '\n', ''
                if interactive_input is None:
                    return 0, '', ''
                cmdargs = parse_cmdargs(shlex.split(interactive_input))[2]
                try:
                    target = find_cmd_target(cmdargs)
                except Exception as e:
                    print('error handling command target: {0}'.format(e),
                          file=sys.stderr)
                    continue
                if len(cmdargs) and cmdargs[0] == 'tell':
                    print('Can not use \'tell\' in interactive mode.',
                          file=sys.stderr)
                    continue
                ret, outbuf, outs = do_command(parsed_args, target, cmdargs,
                                               sigdict, inbuf, verbose)
                if ret < 0:
                    ret = -ret
                    errstr = errno.errorcode.get(ret, 'Unknown')
                    print(u'Error {0}: {1}'.format(errstr, outs), file=sys.stderr)
                else:
                    if outs:
                        print(outs, file=sys.stderr)
                    if outbuf:
                        print(outbuf.decode('utf-8'))

    return ret, outbuf, outs


def complete(sigdict, args, target):
    """
    Command completion.  Match as much of [args] as possible,
    and print every possible match separated by newlines.
    Return exitcode.
    """
    # XXX this looks a lot like the front of validate_command().  Refactor?

    # Repulsive hack to handle tell: lop off 'tell' and target
    # and validate the rest of the command.  'target' is already
    # determined in our callers, so it's ok to remove it here.
    if len(args) and args[0] == 'tell':
        args = args[2:]
    # look for best match, accumulate possibles in bestcmds
    # (so we can maybe give a more-useful error message)

    match_count = 0
    comps = []
    for cmdtag, cmd in sigdict.items():
        flags = cmd.get('flags', 0)
        if flags & (Flag.OBSOLETE | Flag.HIDDEN):
            continue
        sig = cmd['sig']
        j = 0
        # iterate over all arguments, except last one
        for arg in args[0:-1]:
            if j > len(sig)-1:
                # an out of argument definitions
                break
            found_match = arg in sig[j].complete(arg)
            if not found_match and sig[j].req:
                # no elements that match
                break
            if not sig[j].N:
                j += 1
        else:
            # successfully matched all - except last one - arguments
            if j < len(sig) and len(args) > 0:
                comps += sig[j].complete(args[-1])

            match_count += 1
            match_cmd = cmd

    if match_count == 1 and len(comps) == 0:
        # only one command matched and no hints yet => add help
        comps = comps + [' ', '#'+match_cmd['help']]
    print('\n'.join(sorted(set(comps))))
    return 0


def ping_monitor(cluster_handle, name, timeout):
    if 'mon.' not in name:
        print('"ping" expects a monitor to ping; try "ping mon.<id>"', file=sys.stderr)
        return 1

    mon_id = name[len('mon.'):]
    if mon_id == '*':
        run_in_thread(cluster_handle.connect, timeout=timeout)
        for m in monids():
            s = run_in_thread(cluster_handle.ping_monitor, m)
            if s is None:
                print("mon.{0}".format(m) + '\n' + "Error connecting to monitor.")
            else:
                print("mon.{0}".format(m) + '\n' + s)
    else:
            s = run_in_thread(cluster_handle.ping_monitor, mon_id)
            print(s)
    return 0


def maybe_daemon_command(parsed_args, childargs):
    """
    Check if --admin-socket, daemon, or daemonperf command
    if it is, returns (boolean handled, return code if handled == True)
    """

    daemon_perf = False
    sockpath = None
    if parsed_args.admin_socket:
        sockpath = parsed_args.admin_socket
    elif len(childargs) > 0 and childargs[0] in ["daemon", "daemonperf"]:
        daemon_perf = (childargs[0] == "daemonperf")
        # Treat "daemon <path>" or "daemon <name>" like --admin_daemon <path>
        # Handle "daemonperf <path>" the same but requires no trailing args
        require_args = 2 if daemon_perf else 3
        if len(childargs) >= require_args:
            if childargs[1].find('/') >= 0:
                sockpath = childargs[1]
            else:
                # try resolve daemon name
                try:
                    sockpath = ceph_conf(parsed_args, 'admin_socket',
                                         childargs[1])
                except Exception as e:
                    print('Can\'t get admin socket path: ' + str(e), file=sys.stderr)
                    return True, errno.EINVAL
            # for both:
            childargs = childargs[2:]
        else:
            print('{0} requires at least {1} arguments'.format(childargs[0], require_args),
                  file=sys.stderr)
            return True, errno.EINVAL

    if sockpath and daemon_perf:
        return True, daemonperf(childargs, sockpath)
    elif sockpath:
        try:
            raw_write(admin_socket(sockpath, childargs, parsed_args.output_format))
        except Exception as e:
            print('admin_socket: {0}'.format(e), file=sys.stderr)
            return True, errno.EINVAL
        return True, 0

    return False, 0


def isnum(s):
    try:
        float(s)
        return True
    except ValueError:
        return False


def daemonperf(childargs, sockpath):
    """
    Handle daemonperf command; returns errno or 0

    daemonperf <daemon> [priority string] [statpats] [interval] [count]
    daemonperf <daemon> list|ls [statpats]
    """

    interval = 1
    count = None
    statpats = None
    priority = None
    do_list = False

    def prio_from_name(arg):

        PRIOMAP = {
            'critical': PRIO_CRITICAL,
            'interesting': PRIO_INTERESTING,
            'useful': PRIO_USEFUL,
            'uninteresting': PRIO_UNINTERESTING,
            'debugonly': PRIO_DEBUGONLY,
        }

        if arg in PRIOMAP:
            return PRIOMAP[arg]
        # allow abbreviation
        for name, val in PRIOMAP.items():
            if name.startswith(arg):
                return val
        return None

    # consume and analyze non-numeric args
    while len(childargs) and not isnum(childargs[0]):
        arg = childargs.pop(0)
        # 'list'?
        if arg in ['list', 'ls']:
            do_list = True
            continue
        # prio?
        prio = prio_from_name(arg)
        if prio is not None:
            priority = prio
            continue
        # statpats
        statpats = arg.split(',')

    if priority is None:
        priority = PRIO_DEFAULT

    if len(childargs) > 0:
        try:
            interval = float(childargs.pop(0))
            if interval < 0:
                raise ValueError
        except ValueError:
            print('daemonperf: interval should be a positive number', file=sys.stderr)
            return errno.EINVAL

    if len(childargs) > 0:
        arg = childargs.pop(0)
        if (not isnum(arg)) or (int(arg) < 0):
            print('daemonperf: count should be a positive integer', file=sys.stderr)
            return errno.EINVAL
        count = int(arg)

    watcher = DaemonWatcher(sockpath, statpats, priority)
    if do_list:
        watcher.list()
    else:
        watcher.run(interval, count)

    return 0

def get_scrub_timestamps(childargs):
    last_scrub_stamp = "last_" + childargs[1].replace('-', '_') + "_stamp"
    results = dict()
    scruball = False
    if childargs[2] in ['all', 'any', '*']:
        scruball = True
    devnull = open(os.devnull, 'w')
    out = subprocess.check_output(['ceph', 'pg', 'dump', '--format=json-pretty'],
                                  stderr=devnull)
    try:
        pgstats = json.loads(out)['pg_map']['pg_stats']
    except KeyError:
        pgstats = json.loads(out)['pg_stats']
    for stat in pgstats:
        if scruball or stat['up_primary'] == int(childargs[2]):
            scrub_tuple = (stat['up_primary'], stat[last_scrub_stamp])
            results[stat['pgid']] = scrub_tuple
    return results

def check_scrub_stamps(waitdata, currdata):
    for pg in waitdata.keys():
       # Try to handle the case where a pg may not exist in current results
       if pg in currdata and waitdata[pg][1] == currdata[pg][1]:
           return False
    return True

def waitscrub(childargs, waitdata):
    print(u'Waiting for {0} to complete...'.format(childargs[1]), file=sys.stdout)
    currdata = get_scrub_timestamps(childargs)
    while not check_scrub_stamps(waitdata, currdata):
        time.sleep(3)
        currdata = get_scrub_timestamps(childargs)
    print(u'{0} completed'.format(childargs[1]), file=sys.stdout)

def wait(childargs, waitdata):
    if childargs[1] in ['scrub', 'deep-scrub']:
        waitscrub(childargs, waitdata)


def main():
    ceph_args = os.environ.get('CEPH_ARGS')
    if ceph_args:
        if "injectargs" in sys.argv:
            i = sys.argv.index("injectargs")
            sys.argv = sys.argv[:i] + ceph_args.split() + sys.argv[i:]
        else:
            sys.argv.extend([arg for arg in ceph_args.split()
                             if '--admin-socket' not in arg])
    parser, parsed_args, childargs = parse_cmdargs()

    if parsed_args.version:
        print('ceph version {0} ({1}) {2} ({3})'.format(
            CEPH_GIT_NICE_VER,
            CEPH_GIT_VER,
            CEPH_RELEASE_NAME,
            CEPH_RELEASE_TYPE))  # noqa
        return 0

    # --watch-channel|-W implies -w
    if parsed_args.watch_channel:
        parsed_args.watch = True
    elif parsed_args.watch and not parsed_args.watch_channel:
        parsed_args.watch_channel = 'cluster'

    global verbose
    verbose = parsed_args.verbose

    if verbose:
        print("parsed_args: {0}, childargs: {1}".format(parsed_args, childargs), file=sys.stderr)

    # pass on --id, --name, --conf
    name = 'client.admin'
    if parsed_args.client_id:
        name = 'client.' + parsed_args.client_id
    if parsed_args.client_name:
        name = parsed_args.client_name

    # default '' means default conf search
    conffile = ''
    if parsed_args.cephconf:
        conffile = parsed_args.cephconf
    # For now, --admin-daemon is handled as usual.  Try it
    # first in case we can't connect() to the cluster

    done, ret = maybe_daemon_command(parsed_args, childargs)
    if done:
        return ret

    timeout = None
    if parsed_args.cluster_timeout:
        timeout = parsed_args.cluster_timeout

    # basic help
    if parsed_args.help:
        do_basic_help(parser, childargs)

    # handle any 'generic' ceph arguments that we didn't parse here
    global cluster_handle

    # rados.Rados() will call rados_create2, and then read the conf file,
    # and then set the keys from the dict.  So we must do these
    # "pre-file defaults" first (see common_preinit in librados)
    conf_defaults = {
        'log_to_stderr': 'true',
        'err_to_stderr': 'true',
        'log_flush_on_exit': 'true',
    }

    if 'injectargs' in childargs:
        position = childargs.index('injectargs')
        injectargs = childargs[position:]
        childargs = childargs[:position]
        if verbose:
            print('Separate childargs {0} from injectargs {1}'.format(childargs, injectargs),
                  file=sys.stderr)
    else:
        injectargs = None

    clustername = None
    if parsed_args.cluster:
        clustername = parsed_args.cluster

    try:
        cluster_handle = run_in_thread(rados.Rados,
                                       name=name, clustername=clustername,
                                       conf_defaults=conf_defaults,
                                       conffile=conffile)
        retargs = run_in_thread(cluster_handle.conf_parse_argv, childargs)
    except rados.Error as e:
        print('Error initializing cluster client: {0!r}'.format(e), file=sys.stderr)
        return 1

    childargs = retargs
    if not childargs:
        childargs = []

    # -- means "stop parsing args", but we don't want to see it either
    if '--' in childargs:
        childargs.remove('--')
    if injectargs and '--' in injectargs:
        injectargs.remove('--')

    block = False
    waitdata = dict()
    if parsed_args.block:
        if (len(childargs) >= 2 and
                childargs[0] == 'osd' and
                childargs[1] in ['deep-scrub', 'scrub']):
            block = True
            waitdata = get_scrub_timestamps(childargs)

    if parsed_args.help:
        # short default timeout for -h
        if not timeout:
            timeout = 5

    if childargs and childargs[0] == 'ping' and not parsed_args.help:
        if len(childargs) < 2:
            print('"ping" requires a monitor name as argument: "ping mon.<id>"', file=sys.stderr)
            return 1
    if parsed_args.completion:
        # for completion let timeout be really small
        timeout = 3
    try:
        if childargs and childargs[0] == 'ping' and not parsed_args.help:
            return ping_monitor(cluster_handle, childargs[1], timeout)
        result = run_in_thread(cluster_handle.connect, timeout=timeout)
        if type(result) is tuple and result[0] == -errno.EINTR:
            print('Cluster connection interrupted or timed out', file=sys.stderr)
            return 1
    except KeyboardInterrupt:
        print('Cluster connection aborted', file=sys.stderr)
        return 1
    except rados.PermissionDeniedError as e:
        print(str(e), file=sys.stderr)
        return errno.EACCES
    except Exception as e:
        print(str(e), file=sys.stderr)
        return 1

    if parsed_args.help:
        target = None
        if len(childargs) >= 2 and childargs[0] == 'tell':
            target = childargs[1].split('.', 1)
            if not validate_target(target):
                print('target {0} doesn\'t exist; please pass correct target to tell command (e.g., mon.a, osd.1, mds.a, mgr)'.format(childargs[1]), file=sys.stderr)
                return 1
            childargs = childargs[2:]
            hdr('Tell %s commands:' % target[0])
        else:
            hdr('Monitor commands:')
            target = ('mon', '')
        if verbose:
            print('[Contacting monitor, timeout after %d seconds]' % timeout)

        return do_extended_help(parser, childargs, target, ' '.join(childargs))

    # implement "tell service.id help"
    if len(childargs) >= 3 and childargs[0] == 'tell' and childargs[2] == 'help':
        target = childargs[1].split('.', 1)
        if validate_target(target):
            hdr('Tell %s commands' % target[0])
            return do_extended_help(parser, childargs, target, None)
        else:
            print('target {0} doesn\'t exists, please pass correct target to tell command, such as mon.a/'
                  'osd.1/mds.a/mgr'.format(childargs[1]), file=sys.stderr)
            return 1

    # implement -w/--watch_*
    # This is ugly, but Namespace() isn't quite rich enough.
    level = ''
    for k, v in parsed_args._get_kwargs():
        if k.startswith('watch') and v:
            if k == 'watch':
                level = 'info'
            elif k != "watch_channel":
                level = k.replace('watch_', '')
    if level:
        # an awfully simple callback
        def watch_cb(arg, line, channel, name, who, stamp_sec, stamp_nsec, seq, level, msg):
            # Filter on channel
            if sys.version_info[0] >= 3:
                channel = channel.decode('utf-8')
            if (channel == parsed_args.watch_channel or \
                           parsed_args.watch_channel == "*"):
                print(line.decode('utf-8'))
                sys.stdout.flush()

        # first do a ceph status
        ret, outbuf, outs = json_command(cluster_handle, prefix='status')
        if ret:
            print("status query failed: ", outs, file=sys.stderr)
            return ret
        print(outbuf.decode('utf-8'))

        # this instance keeps the watch connection alive, but is
        # otherwise unused
        run_in_thread(cluster_handle.monitor_log2, level, watch_cb, 0)

        # loop forever letting watch_cb print lines
        try:
            signal.pause()
        except KeyboardInterrupt:
            # or until ^C, at least
            return 0

    # read input file, if any
    inbuf = b''
    if parsed_args.input_file:
        try:
            if parsed_args.input_file == '-':
                inbuf = sys.stdin.read()
            else:
                with open(parsed_args.input_file, 'rb') as f:
                    inbuf = f.read()
        except Exception as e:
            print('Can\'t open input file {0}: {1}'.format(parsed_args.input_file, e), file=sys.stderr)
            return 1

    # prepare output file, if any
    if parsed_args.output_file:
        try:
            if parsed_args.output_file == '-':
                outf = raw_stdout
            else:
                outf = open(parsed_args.output_file, 'wb')
        except Exception as e:
            print('Can\'t open output file {0}: {1}'.format(parsed_args.output_file, e), file=sys.stderr)
            return 1
        if parsed_args.setuser:
            try:
                ownerid = pwd.getpwnam(parsed_args.setuser).pw_uid
                os.fchown(outf.fileno(), ownerid, -1)
            except OSError as e:
                print('Failed to change user ownership of {0} to {1}: {2}'.format(outf, parsed_args.setuser, e))
                return 1
        if parsed_args.setgroup:
            try:
                groupid = grp.getgrnam(parsed_args.setgroup).gr_gid
                os.fchown(outf.fileno(), -1, groupid)
            except OSError as e:
                print('Failed to change group ownership of {0} to {1}: {2}'.format(outf, parsed_args.setgroup, e))
                return 1

    # -s behaves like a command (ceph status).
    if parsed_args.status:
        childargs.insert(0, 'status')

    try:
        target = find_cmd_target(childargs)
    except Exception as e:
        print('error handling command target: {0}'.format(e), file=sys.stderr)
        return 1

    # Repulsive hack to handle tell: lop off 'tell' and target
    # and validate the rest of the command.  'target' is already
    # determined in our callers, so it's ok to remove it here.
    is_tell = False
    if len(childargs) and childargs[0] == 'tell':
        childargs = childargs[2:]
        is_tell = True

    if is_tell:
        if injectargs:
            childargs = injectargs
        if not len(childargs):
            print('"{0} tell" requires additional arguments.'.format(sys.argv[0]),
                  'Try "{0} tell <name> <command> [options...]" instead.'.format(sys.argv[0]),
                  file=sys.stderr)
            return errno.EINVAL

    # fetch JSON sigs from command
    # each line contains one command signature (a placeholder name
    # of the form 'cmdNNN' followed by an array of argument descriptors)
    # as part of the validated argument JSON object

    if target[1] == '*':
        service = target[0]
        targets = [(service, o) for o in ids_by_service(service)]
    else:
        targets = [target]

    final_ret = 0
    for target in targets:
        # prettify?  prefix output with target, if there was a wildcard used
        prefix = ''
        suffix = ''
        if not parsed_args.output_file and len(targets) > 1:
            prefix = '{0}.{1}: '.format(*target)
            suffix = '\n'

        ret, outbuf, outs = json_command(cluster_handle, target=target,
                                         prefix='get_command_descriptions')
        if ret:
            where = '{0}.{1}'.format(*target)
            if ret > 0:
                raise RuntimeError('Unexpected return code from {0}: {1}'.
                                   format(where, ret))
            outs = 'problem getting command descriptions from {0}'.format(where)
        else:
            sigdict = parse_json_funcsigs(outbuf.decode('utf-8'), 'cli')

            if parsed_args.completion:
                return complete(sigdict, childargs, target)

            ret, outbuf, outs = new_style_command(parsed_args, childargs,
                                                  target, sigdict, inbuf,
                                                  verbose)

            # debug tool: send any successful command *again* to
            # verify that it is idempotent.
            if not ret and 'CEPH_CLI_TEST_DUP_COMMAND' in os.environ:
                ret, outbuf, outs = new_style_command(parsed_args, childargs,
                                                      target, sigdict, inbuf,
                                                      verbose)
                if ret < 0:
                    ret = -ret
                    print(prefix +
                          'Second attempt of previously successful command '
                          'failed with {0}: {1}'.format(
                              errno.errorcode.get(ret, 'Unknown'), outs),
                          file=sys.stderr)

        if ret < 0:
            ret = -ret
            errstr = errno.errorcode.get(ret, 'Unknown')
            print(u'Error {0}: {1}'.format(errstr, outs), file=sys.stderr)
            if len(targets) > 1:
                final_ret = ret
            else:
                return ret

        if outs:
            print(prefix + outs, file=sys.stderr)

        sys.stdout.flush()

        if parsed_args.output_file:
            outf.write(outbuf)
        else:
            # hack: old code printed status line before many json outputs
            # (osd dump, etc.) that consumers know to ignore.  Add blank line
            # to satisfy consumers that skip the first line, but not annoy
            # consumers that don't.
            if parsed_args.output_format and \
               parsed_args.output_format.startswith('json'):
                print()

            # if we are prettifying things, normalize newlines.  sigh.
            if suffix:
                outbuf = outbuf.rstrip()
            if outbuf:
                try:
                    print(prefix, end='')
                    # Write directly to binary stdout
                    raw_write(outbuf)
                    print(suffix, end='')
                except IOError as e:
                    if e.errno != errno.EPIPE:
                        raise e
        try:
            sys.stdout.flush()
        except IOError as e:
            if e.errno != errno.EPIPE:
                raise e


    # Block until command completion (currently scrub and deep_scrub only)
    if block:
        wait(childargs, waitdata)

    if parsed_args.output_file and parsed_args.output_file != '-':
        outf.close()

    if final_ret:
        return final_ret

    return 0

if __name__ == '__main__':
    try:
        retval = main()
        # shutdown explicitly; Rados() does not
        if retval == 0 and cluster_handle:
            run_in_thread(cluster_handle.shutdown)
    except KeyboardInterrupt:
        print('Interrupted')
        retval = errno.EINTR

    if retval:
        # flush explicitly because we aren't exiting in the usual way
        sys.stdout.flush()
        sys.stderr.flush()
        os._exit(retval)
    else:
        sys.exit(retval)
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