This file is indexed.

/usr/lib/amanda/perl/Amanda/Process.pm is in amanda-common 1:3.3.6-4.

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
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
# Copyright (c) 2008-2013 Zmanda, Inc.  All Rights Reserved.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program 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 General Public License
# for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
#
# Contact information: Zmanda Inc., 465 S. Mathilda Ave., Suite 300
# Sunnyvale, CA 94085, USA, or: http://www.zmanda.com

package Amanda::Process;

use strict;
use warnings;
use Carp;
use POSIX ();
use Exporter;
use vars qw( @ISA @EXPORT_OK );
use File::Basename;
use Amanda::Constants;
use Amanda::Debug qw( debug );
@ISA = qw( Exporter );

=head1 NAME

Amanda::Process -- interface to process

=head1 SYNOPSIS

  use Amanda::Process;

  Amanda::Process::load_ps_table();

  Amanda::Process::scan_log($logfile);

  Amanda::Process::add_child();

  Amanda::Process::set_master_process(@pname);

  Amanda::Process::set_master($pname, $pid);

  Amanda::Process::kill_process($signal);

  my $count = Amanda::Process::process_running();

  my $count = Amanda::Process::count_process();

  my $alive = Amanda::Process::process_alive($pid, $pname);

=head1 INTERFACE

This module provides an object-oriented interface to track process used by
amanda.

my $Amanda_process = Amanda::Process->new($verbose);

=over

=item load_ps_table

  $Amanda_process->load_ps_table();

Load a table of all processes in the system.

=item scan_log

  $Amanda_process->scan_log($logfile);

Parse all 'pid' and 'pid-done' lines of the logfile.

=item add_child

  $Amanda_process->add_child();

Add all children of already known amanda processes.

=item set_master_process

  $Amanda_process->set_master_process($arg, @pname);

Search the process table to find a process in @pname and make it the master, $arg must be an argument of the process.

=item set_master

  $Amanda_process->set_master($pname, $pid);

Set $Amanda_process->{master_pname} and $Amanda_process->{master_pid}.

=item kill_process

  $Amanda_process->kill_process($signal);

Send the $signal to all amanda processes.

=item process_running

  my $count = $Amanda_process->process_running();

Return the number of amanda process alive.

=item count_process

  my $count = $Amanda_process->count_process();

Return the number of amanda process in the table.

=item process_alive

  my $alive = Amanda::Process::process_alive($pid, $pname);

Return 0 if the process is not alive.
Return 1 if the process is still alive.

=back

=cut

sub new {
    my $class = shift;
    my ($verbose) = shift;

    my $self = {
	verbose => $verbose,
	master_name => "",
	master_pid => "",
	pids => {},
	pstable => {},
	ppid => {},
    };
    bless ($self, $class);
    return $self;
}

# Get information about the current set of processes, using ps -e
# and ps -ef.
#
# Side effects:
# - sets %pstable to a map (pid => process name) of all running
#   processes
# - sets %ppid to a map (pid -> parent pid) of all running
#   processes' parent pids
#
sub load_ps_table() {
    my $self = shift;
    $self->{pstable} = {};
    $self->{ppid} = ();
    my $ps_argument = $Amanda::Constants::PS_ARGUMENT;
    if ($ps_argument eq "CYGWIN") {
	open(PSTABLE, "-|", "ps -ef") || die("ps -ef: $!");
	my $psline = <PSTABLE>; #header line
	while($psline = <PSTABLE>) {
	    chomp $psline;
	    my @psline = split " ", $psline;
	    my $pid = $psline[1];
	    my $ppid = $psline[2];
	    my $stime = $psline[4];
	    my $pname;
	    if ($stime =~ /:/) {  # 10:32:44
		$pname = basename($psline[5])
	    } else {              # May 22
		$pname = basename($psline[6])
	    }
	    $self->{pstable}->{$pid} = $pname;
	    $self->{ppid}->{$pid} = $ppid;
	}
	close(PSTABLE);
    } else {
	open(PSTABLE, "-|", "$Amanda::Constants::PS $ps_argument")
	    or die("$Amanda::Constants::PS $ps_argument: $!");
	my $psline = <PSTABLE>; #header line
	while($psline = <PSTABLE>) {
	    chomp $psline;
	    my ($pid, $ppid, $pname, $arg1, $arg2) = split " ", $psline;
	    $pname = basename($pname);
	    if ($pname =~ /^perl/ && defined $arg1) {
		if ($arg1 !~ /^\-/) {
		    $pname = $arg1;
		} elsif (defined $arg2) {
		    if ($arg2 !~ /^\-/) {
			$pname = $arg2;
		    }
		}
		$pname = basename($pname);
	    }
	    $self->{pstable}->{$pid} = $pname;
	    $self->{ppid}->{$pid} = $ppid;
	}
	close(PSTABLE);
    }
}

# Scan a logfile for processes that should still be running: processes
# having an "INFO foo bar pid 1234" line in the log, but no corresponding
# "INFO pid-done 1234", and only if pid 1234 has the correct process
# name.
#
# Prerequisites:
#  %pstable must be set up (use load_ps_table)
#
# Side effects:
# - sets %pids to a map (pid => process name) of all still-running
#   Amanda processes
# - sets $master_pname to the top-level process for this run (e.g.,
#   amdump, amflush)
# - sets $master_pid to the pid of $master_pname
#
# @param $logfile: the logfile to scan
#
sub scan_log($) {
    my $self = shift;
    my $logfile = shift;
    my $first = 1;
    my($line);

    open(LOGFILE, "<", $logfile) || die("$logfile: $!");
    while($line = <LOGFILE>) {
	if ($line =~ /^INFO .* (.*) pid (\d*)$/) {
	    my ($pname, $pid) = ($1, $2);
	    if ($first == 1) {
		$self->{master_pname} = $pname;
		$self->{master_pid} = $pid;
		$first = 0;
	    }
	    if (defined $self->{pstable}->{$pid} && $pname eq $self->{pstable}->{$pid}) {
		$self->{pids}->{$pid} = $pname;
	    } elsif (defined $self->{pstable}->{$pid} && $self->{pstable}->{$pid} =~ /perl/) {
		# We can get 'perl' for a perl script.
		$self->{pids}->{$pid} = $pname;
	    } elsif (defined $self->{pstable}->{$pid}) {
		debug("pid $pid doesn't match: " . $pname . " != " . $self->{pstable}->{$pid});
		print "pid $pid doesn't match: ", $pname, " != ", $self->{pstable}->{$pid}, "\n" if $self->{verbose};
	    }
	} elsif ($line =~ /^INFO .* pid-done (\d*)$/) {
	    my $pid = $1;
	    print "pid $pid is done\n" if $self->{verbose};
	    delete $self->{pids}->{$pid};
	}
    }
    close(LOGFILE);

    # log unexpected dead process
    if ($self->{verbose}) {
	for my $pid (keys %{$self->{pids}}) {
	    if (!defined $self->{pstable}->{$pid}) {
		print "pid $pid is dead\n";
	    }
	}
    }
}

# Recursive function to add all child processes of $pid to %amprocess.
#
# Prerequisites:
# - %ppid must be set (load_ps_table)
#
# Side-effects:
# - adds all child processes of $pid to %amprocess
#
# @param $pid: the process to start at
#
sub add_child_pid($);
sub add_child_pid($) {
    my $self = shift;
    my $pid = shift;
    foreach my $cpid (keys %{$self->{ppid}}) {
	my $ppid = $self->{ppid}->{$cpid};
	if ($pid == $ppid) {
	    if (!defined $self->{amprocess}->{$cpid}) {
		$self->{amprocess}->{$cpid} = $cpid;
		$self->add_child_pid($cpid);
	    }
	}
    }
}

# Find all children of all amanda processes, as determined by traversing
# the process graph (via %ppid).
#
# Prerequisites:
# - %ppid must be set (load_ps_table)
# - %pids must be set (scan_log)
#
# Side-effects:
# - sets %amprocess to a map (pid => pid) of all amanda processes, including
#   children
#
sub add_child() {
    my $self = shift;
    foreach my $pid (keys %{$self->{pids}}) {
	if (defined $pid) {
	    $self->{amprocess}->{$pid} = $pid;
	}
    }

    foreach my $pid (keys %{$self->{pids}}) {
	$self->add_child_pid($pid);
    }
}

# Set master_pname and master_pid.
#
# Side-effects:
# - sets $self->{master_pname} and $self->{master_pid}.
#
sub set_master_process {
    my $self = shift;
    my $arg = shift;
    my @pname = @_;

    my $ps_argument_args = $Amanda::Constants::PS_ARGUMENT_ARGS;
    for my $pname (@pname) {
	my $pid;

	if ($ps_argument_args eq "CYGWIN") {
	    $pid = `ps -ef|grep -w ${pname}|grep -w ${arg}| grep -v grep | awk '{print \$2}'`;
	} else {
	    $pid = `$Amanda::Constants::PS $ps_argument_args|grep -w ${pname}|grep -w ${arg}| grep -v grep | awk '{print \$1}'`;
	}
	chomp $pid;
	if ($pid ne "") {
	    $self->set_master($pname, $pid);
	}
    }
}

# Set master_pname and master_pid.
#
# Side-effects:
# - sets $self->{master_pname} and $self->{master_pid}.
#
sub set_master($$) {
    my $self = shift;
    my $pname = shift;
    my $pid = shift;

    $self->{master_pname} = $pname;
    $self->{master_pid} = $pid;
    $self->{pids}->{$pid} = $pname;
}
# Send a signal to all amanda process
#
# Side-effects:
# - All amanda process receive the signal.
#
# Prerequisites:
# - %amprocess must be set (add_child)
#
# @param $signal: the signal to send
#
sub kill_process($) {
    my $self = shift;
    my $signal = shift;

    foreach my $pid (keys %{$self->{amprocess}}) {
	print "Sendding $signal signal to pid $pid\n" if $self->{verbose};
	kill $signal, $pid;
    }
}

# Count the number of processes in %amprocess that are still running.  This
# re-runs 'ps -e' every time, so calling it repeatedly may result in a
# decreasing count.
#
# Prerequisites:
# - %amprocess must be set (add_child)
#
# @returns: number of pids in %amprocess that are still alive
sub process_running() {
    my $self = shift;

    $self->load_ps_table();
    my $count = 0;
    foreach my $pid (keys %{$self->{amprocess}}) {
	if (defined $self->{pstable}->{$pid}) {
	    $count++;
	}
    }

    return $count;
}

# Count the number of processes in %amprocess.
#
# Prerequisites:
# - %amprocess must be set (add_child)
#
# @returns: number of pids in %amprocess.
sub count_process() {
    my $self = shift;

    return scalar keys( %{$self->{amprocess}} );
}

# return if a process is alive.  If $pname is provided,
# only returns 1 if the name matches.
#
# Prerequisites:
# - %pstable must be set (load_ps_table)
#
# @param $pid: the pid of the process
# @param $pname: the name of the process (optional)
#
# @returns: 1 if process is alive
#           '' if process is dead

sub process_alive() {
    my $self = shift;
    my $pid = shift;
    my $pname = shift;

    if (defined $pname && defined $self->{pstable}->{$pid}) {
	return $self->{pstable}->{$pid} eq $pname;
    } else {
	return defined $self->{pstable}->{$pid};
    }
}

1;