This file is indexed.

/usr/share/pyshared/psshlib/task.py is in pssh 2.2.2-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
# Copyright (c) 2009, Andrew McNabb

from errno import EINTR
from subprocess import Popen, PIPE
import os
import signal
import sys
import time
import traceback

from psshlib import askpass_client
from psshlib import color

BUFFER_SIZE = 1 << 16

try:
    bytes
except NameError:
    bytes = str


class Task(object):
    """Starts a process and manages its input and output.
    
    Upon completion, the `exitstatus` attribute is set to the exit status
    of the process.
    """
    def __init__(self, host, port, user, cmd, opts, stdin=None):
        self.exitstatus = None

        self.host = host
        self.pretty_host = host
        self.port = port
        self.cmd = cmd

        if user != opts.user:
            self.pretty_host = '@'.join((user, self.pretty_host))
        if port:
            self.pretty_host = ':'.join((self.pretty_host, port))

        self.proc = None
        self.writer = None
        self.timestamp = None
        self.failures = []
        self.killed = False
        self.inputbuffer = stdin
        self.byteswritten = 0
        self.outputbuffer = bytes()
        self.errorbuffer = bytes()

        self.stdin = None
        self.stdout = None
        self.stderr = None
        self.outfile = None
        self.errfile = None

        # Set options.
        self.verbose = opts.verbose
        try:
            self.print_out = bool(opts.print_out)
        except AttributeError:
            self.print_out = False
        try:
            self.inline = bool(opts.inline)
        except AttributeError:
            self.inline = False

    def start(self, nodenum, iomap, writer, askpass_socket=None):
        """Starts the process and registers files with the IOMap."""
        self.writer = writer

        if writer:
            self.outfile, self.errfile = writer.open_files(self.pretty_host)

        # Set up the environment.
        environ = dict(os.environ)
        environ['PSSH_NODENUM'] = str(nodenum)
        # Disable the GNOME pop-up password dialog and allow ssh to use
        # askpass.py to get a provided password.  If the module file is
        # askpass.pyc, we replace the extension.
        environ['SSH_ASKPASS'] = askpass_client.executable_path()
        if askpass_socket:
            environ['PSSH_ASKPASS_SOCKET'] = askpass_socket
        # Work around a mis-feature in ssh where it won't call SSH_ASKPASS
        # if DISPLAY is unset.
        if 'DISPLAY' not in environ:
            environ['DISPLAY'] = 'pssh-gibberish'

        # Create the subprocess.  Since we carefully call set_cloexec() on
        # all open files, we specify close_fds=False.
        self.proc = Popen(self.cmd, stdin=PIPE, stdout=PIPE, stderr=PIPE,
                close_fds=False, preexec_fn=os.setsid, env=environ)
        self.timestamp = time.time()
        if self.inputbuffer:
            self.stdin = self.proc.stdin
            iomap.register_write(self.stdin.fileno(), self.handle_stdin)
        else:
            self.proc.stdin.close()
        self.stdout = self.proc.stdout
        iomap.register_read(self.stdout.fileno(), self.handle_stdout)
        self.stderr = self.proc.stderr
        iomap.register_read(self.stderr.fileno(), self.handle_stderr)

    def _kill(self):
        """Signals the process to terminate."""
        if self.proc:
            try:
                os.kill(-self.proc.pid, signal.SIGKILL)
            except OSError:
                # If the kill fails, then just assume the process is dead.
                pass
            self.killed = True

    def timedout(self):
        """Kills the process and registers a timeout error."""
        if not self.killed:
            self._kill()
            self.failures.append('Timed out')

    def interrupted(self):
        """Kills the process and registers an keyboard interrupt error."""
        if not self.killed:
            self._kill()
            self.failures.append('Interrupted')

    def cancel(self):
        """Stops a task that has not started."""
        self.failures.append('Cancelled')

    def elapsed(self):
        """Finds the time in seconds since the process was started."""
        return time.time() - self.timestamp

    def running(self):
        """Finds if the process has terminated and saves the return code."""
        if self.stdin or self.stdout or self.stderr:
            return True
        if self.proc:
            self.exitstatus = self.proc.poll()
            if self.exitstatus is None:
                if self.killed:
                    # Set the exitstatus to what it would be if we waited.
                    self.exitstatus = -signal.SIGKILL
                    return False
                else:
                    return True
            else:
                if self.exitstatus < 0:
                    message = 'Killed by signal %s' % (-self.exitstatus)
                    self.failures.append(message)
                elif self.exitstatus > 0:
                    message = 'Exited with error code %s' % self.exitstatus
                    self.failures.append(message)
                self.proc = None
                return False

    def handle_stdin(self, fd, iomap):
        """Called when the process's standard input is ready for writing."""
        try:
            start = self.byteswritten
            if start < len(self.inputbuffer):
                chunk = self.inputbuffer[start:start+BUFFER_SIZE]
                self.byteswritten = start + os.write(fd, chunk)
            else:
                self.close_stdin(iomap)
        except (OSError, IOError):
            _, e, _ = sys.exc_info()
            if e.errno != EINTR:
                self.close_stdin(iomap)
                self.log_exception(e)

    def close_stdin(self, iomap):
        if self.stdin:
            iomap.unregister(self.stdin.fileno())
            self.stdin.close()
            self.stdin = None

    def handle_stdout(self, fd, iomap):
        """Called when the process's standard output is ready for reading."""
        try:
            buf = os.read(fd, BUFFER_SIZE)
            if buf:
                if self.inline:
                    self.outputbuffer += buf
                if self.outfile:
                    self.writer.write(self.outfile, buf)
                if self.print_out:
                    sys.stdout.write('%s: %s' % (self.host, buf))
                    if buf[-1] != '\n':
                        sys.stdout.write('\n')
            else:
                self.close_stdout(iomap)
        except (OSError, IOError):
            _, e, _ = sys.exc_info()
            if e.errno != EINTR:
                self.close_stdout(iomap)
                self.log_exception(e)

    def close_stdout(self, iomap):
        if self.stdout:
            iomap.unregister(self.stdout.fileno())
            self.stdout.close()
            self.stdout = None
        if self.outfile:
            self.writer.close(self.outfile)
            self.outfile = None

    def handle_stderr(self, fd, iomap):
        """Called when the process's standard error is ready for reading."""
        try:
            buf = os.read(fd, BUFFER_SIZE)
            if buf:
                if self.inline:
                    self.errorbuffer += buf
                if self.errfile:
                    self.writer.write(self.errfile, buf)
            else:
                self.close_stderr(iomap)
        except (OSError, IOError):
            _, e, _ = sys.exc_info()
            if e.errno != EINTR:
                self.close_stderr(iomap)
                self.log_exception(e)

    def close_stderr(self, iomap):
        if self.stderr:
            iomap.unregister(self.stderr.fileno())
            self.stderr.close()
            self.stderr = None
        if self.errfile:
            self.writer.close(self.errfile)
            self.errfile = None

    def log_exception(self, e):
        """Saves a record of the most recent exception for error reporting."""
        if self.verbose:
            exc_type, exc_value, exc_traceback = sys.exc_info()
            exc = ("Exception: %s, %s, %s" %
                    (exc_type, exc_value, traceback.format_tb(exc_traceback)))
        else:
            exc = str(e)
        self.failures.append(exc)

    def report(self, n):
        """Pretty prints a status report after the Task completes."""
        error = ', '.join(self.failures)
        tstamp = time.asctime().split()[3] # Current time
        if color.has_colors(sys.stdout):
            progress = color.c("[%s]" % color.B(n))
            success = color.g("[%s]" % color.B("SUCCESS"))
            failure = color.r("[%s]" % color.B("FAILURE"))
            stderr = color.r("Stderr: ")
            error = color.r(color.B(error))
        else:
            progress = "[%s]" % n
            success = "[SUCCESS]"
            failure = "[FAILURE]"
            stderr = "Stderr: "
        host = self.pretty_host
        if self.failures:
            print(' '.join((progress, tstamp, failure, host, error)))
        else:
            print(' '.join((progress, tstamp, success, host)))
        # NOTE: The extra flushes are to ensure that the data is output in
        # the correct order with the C implementation of io.
        if self.outputbuffer:
            sys.stdout.flush()
            try:
                sys.stdout.buffer.write(self.outputbuffer)
                sys.stdout.flush()
            except AttributeError:
                sys.stdout.write(self.outputbuffer)
        if self.errorbuffer:
            sys.stdout.write(stderr)
            # Flush the TextIOWrapper before writing to the binary buffer.
            sys.stdout.flush()
            try:
                sys.stdout.buffer.write(self.errorbuffer)
            except AttributeError:
                sys.stdout.write(self.errorbuffer)