/usr/sbin/amavisd-nanny is in amavisd-new 1:2.11.0-1ubuntu1.
This file is owned by root:root, with mode 0o755.
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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 | #!/usr/bin/perl -T
#------------------------------------------------------------------------------
# This is amavisd-nanny, a program to show the status
# and keep an eye on the health of child processes in amavisd-new.
#
# Author: Mark Martinec <Mark.Martinec@ijs.si>
#
# Copyright (c) 2004-2014, Mark Martinec
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# 2. 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 OWNER 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.
#
# The views and conclusions contained in the software and documentation are
# those of the authors and should not be interpreted as representing official
# policies, either expressed or implied, of the Jozef Stefan Institute.
# (the above license is the 2-clause BSD license, also known as
# a "Simplified BSD License", and pertains to this program only)
#
# Patches and problem reports are welcome.
# The latest version of this program is available at:
# http://www.ijs.si/software/amavisd/
#------------------------------------------------------------------------------
use strict;
use re 'taint';
use warnings;
no warnings 'uninitialized';
use Errno qw(ESRCH ENOENT);
use POSIX qw(strftime);
use Time::HiRes ();
use BerkeleyDB;
use vars qw($VERSION); $VERSION = 1.401;
my($idlettl) = 3*60*60; # idle children are sent a SIGTERM
# after this many seconds
my($activettl) = 10*60; # stuck active children are sent a SIGTERM
# after this many seconds
my($dbfile) = 'nanny.db';
my($db_home) = # DB databases directory
defined $ENV{'AMAVISD_DB_HOME'} ? $ENV{'AMAVISD_DB_HOME'} : '/var/lib/amavis/db';
my($wakeuptime) = 2; # -w, sleep time in seconds, may be fractional
my($repeatcount); # -c, repeat count (when defined)
sub fmt_age($$$) {
my($t,$state_bar,$idling) = @_;
$t = int($t);
my($char) = $idling ? '.' : '=';
my($bar_l) = $idling ? $t : length($state_bar);
my($bar) = substr( ($char x 9 . ':') x 3 . $char x 5, 0,$bar_l);
if (!$idling) {
$state_bar = substr($state_bar,0,length($bar)-2) . substr($state_bar,-1,1)
. '>' if length($state_bar) > length($bar);
for my $j (0 .. length($bar)-1) {
substr($bar,$j,1) = substr($state_bar,$j,1)
if substr($bar,$j,1) eq '=' && substr($state_bar,$j,1) ne ' ';
}
}
my($s) = $t % 60; $t = int($t/60);
my($m) = $t % 60; $t = int($t/60);
my($h) = $t % 24; $t = int($t/24);
my($d) = $t;
my($str) = sprintf("%d:%02d:%02d", $h,$m,$s);
$str = (!$d ? " " : sprintf("%dd",$d)) . $str;
$str . ' ' . $bar;
};
# main program starts here
my($normal_termination) = 0;
$SIG{INT} = sub { die "\n" }; # do the END code block when interrupted
while (@ARGV) {
my($opt) = shift @ARGV;
my($val) = shift @ARGV;
if ($opt eq '-w' && $val =~ /^\+?\d+(?:\.\d*)?\z/) { $wakeuptime = $val }
elsif ($opt eq '-c' && $val =~ /^[+-]?\d+\z/) { $repeatcount = $val }
else {
print <<'EOD';
States legend:
A accepted a connection
b begin with a protocol for accepting a request
m 'MAIL FROM' smtp command started a new transaction in the same session
d transferring data from MTA to amavisd
= content checking just started
G generating and verifying unique mail_id
D decoding of mail parts
V virus scanning
S spam scanning
P pen pals database lookup and updates
r preparing results
Q quarantining and preparing/sending notifications
F forwarding mail to MTA
. content checking just finished
sp space indicates idle (elapsed bar is showing dots)
EOD
die "Usage: $0 [-c <count>] [-w <wait-interval>]\n";
}
}
print <<'EOD';
process-id task-id elapsed in elapsed-bar (dots indicate idle)
or state idle or busy
EOD
my(%waittime); # associative array on pid
my($env,$db,$old_db_inode,@dbstat,$cursor);
my(%proc_last_timestamp, %proc_state_bars);
for (;;) {
last if defined $repeatcount && $repeatcount <= 0;
@dbstat = stat("$db_home/$dbfile");
my($errn) = @dbstat ? 0 : 0+$!;
$errn==0 || $errn==ENOENT or die "stat $db_home/$dbfile: $!";
if (defined $db && $old_db_inode != $dbstat[1]) {
$db->db_close==0 or die "BDB db_close error: $BerkeleyDB::Error $!";
undef $db;
printf STDERR ("Reopening nanny database %s/%s\n", $db_home,$dbfile);
}
if (!defined $db && $errn==0) {
$old_db_inode = $dbstat[1];
$env = BerkeleyDB::Env->new(
-Home => $db_home, -Flags => DB_INIT_CDB | DB_INIT_MPOOL,
-ErrFile => \*STDOUT, -Verbose => 1);
defined $env or die "BDB no env: $BerkeleyDB::Error $!";
$db = BerkeleyDB::Hash->new(-Filename => $dbfile, -Env => $env);
defined $db or die "BDB no dbN 1: $BerkeleyDB::Error $!";
}
$| = 0;
my(%proc_timestamp, %proc_state, %proc_task_id);
my($stat,$key,$val); my($now);
my($eval_stat,$interrupt); $interrupt = '';
if (!defined $db) {
printf STDERR ("No nanny database %s/%s; waiting...\n",
$db_home,$dbfile);
} else {
$repeatcount-- if defined $repeatcount && $repeatcount > 0;
print "\n";
my($h1) = sub { $interrupt = $_[0] };
local(@SIG{qw(INT HUP TERM TSTP QUIT ALRM USR1 USR2)}) = ($h1) x 8;
eval {
$cursor = $db->db_cursor; # obtain read lock
defined $cursor or die "db_cursor error: $BerkeleyDB::Error";
$now = Time::HiRes::time; local($1,$2);
my($now_utc_iso8601) = strftime("%Y%m%dT%H%M%S",gmtime(int($now)));
while ( ($stat=$cursor->c_get($key,$val,DB_NEXT)) == 0 ) {
if ($val !~ /^(\d+(?:\.\d*)?) (.*?) *\z/s) {
print STDERR "Bad db entry: $key, $val\n";
} else {
$proc_timestamp{$key} = $1; my($task_id) = $2;
$proc_state{$key} = $1 if $task_id =~ s/^([^0-9])//;
$proc_task_id{$key} = $task_id;
if (!exists $proc_state_bars{$key}) { # new process appeared
$proc_last_timestamp{$key} = $proc_timestamp{$key};
$proc_state_bars{$key} = '';
}
}
}
$stat==DB_NOTFOUND or die "c_get: $BerkeleyDB::Error $!";
$cursor->c_close==0 or die "c_close error: $BerkeleyDB::Error";
$cursor = undef;
};
my($eval_stat) = $@;
if (defined $db) {
$cursor->c_close if defined $cursor; # unlock, ignoring status
$cursor = undef;
}
}
if ($interrupt ne '') { kill($interrupt,$$) } # resignal, ignoring status
elsif ($eval_stat ne '') { chomp($eval_stat); die "BDB $eval_stat\n" }
for my $key (keys(%proc_state_bars)) { # remove old entries
if (!exists($proc_timestamp{$key})) {
delete $proc_timestamp{$key};
delete $proc_task_id{$key};
delete $proc_state_bars{$key};
}
}
my(@to_be_removed,@killed);
for my $pid (sort {$a<=>$b} keys %proc_timestamp) {
$proc_state{$pid} = ' ' if $proc_state{$pid} eq '';
my($idling) = $proc_task_id{$pid} eq '' &&
$proc_state{$pid} =~ /^[. ]?\z/s;
my($age) = $now - $proc_timestamp{$pid};
if ($idling) { $proc_state_bars{$pid} = '' }
else {
$proc_state_bars{$pid} = ''
if $proc_timestamp{$pid} ne $proc_last_timestamp{$pid};
my($len) = int($age+0.5);
$len = 1 if $len < 1;
my($str) = $proc_state_bars{$pid};
if ($len > length($str)) { # replicate last character to desired size
my($ch) = $str eq '' ? '=' : substr($str,-1,1);
$str .= $ch x ($len - length($str));
}
substr($str,$len-1,1) = $proc_state{$pid};
$proc_state_bars{$pid} = $str;
}
$proc_last_timestamp{$pid} = $proc_timestamp{$pid};
my($ttl) = $idling ? $idlettl : $activettl;
my($n) = kill(0,$pid); # test if the process is still there
if ($n == 0 && $! != ESRCH) {
die "Can't check the process $pid: $!";
} elsif ($n == 0) { # ESRCH means there is no such process
printf STDERR ("PID %s: %-11s went away %s\n",
$pid, $proc_task_id{$pid} || $proc_state{$pid},
fmt_age($age, $proc_state_bars{$pid}, $idling) );
push(@to_be_removed, $pid);
} elsif ($age <= $ttl) { # all ok
printf STDERR ("PID %s: %-11s %s\n",
$pid, $proc_task_id{$pid} || $proc_state{$pid},
fmt_age($age, $proc_state_bars{$pid}, $idling) );
} else { # send a SIGTERM
printf STDERR ("PID %s: %-11s terminated %s\n",
$pid, $proc_task_id{$pid} || $proc_state{$pid},
fmt_age($age, $proc_state_bars{$pid}, $idling) );
if (kill('TERM',$pid) || $! == ESRCH) { push(@killed,$pid) }
else { warn "Can't SIGTERM $pid: $!" }
}
}
if (@to_be_removed) {
local($SIG{'INT'}) = 'IGNORE';
$cursor = $db->db_cursor(DB_WRITECURSOR); # obtain a write lock
defined $cursor or die "BDB db_cursor error: $BerkeleyDB::Error";
for my $key (@to_be_removed) {
my($val); my($stat) = $cursor->c_get($key,$val,DB_SET);
$stat==0 || $stat==DB_NOTFOUND
or die "BDB c_get: $BerkeleyDB::Error, $!.";
if ($stat==0) { # remove existing entry
$cursor->c_del==0 or die "BDB c_del: $BerkeleyDB::Error, $!.";
}
}
$cursor->c_close==0 or die "BDB c_close error: $BerkeleyDB::Error";
$cursor = undef;
}
my($delay) = 1; # seconds
while (@killed) {
Time::HiRes::sleep($delay); $delay = 2;
for my $pid (@killed) {
$waittime{$pid}++;
printf STDERR ("PID %s: sending SIGKILL in %d s\n",
$pid, 30-$waittime{$pid});
if ($waittime{$pid} > 30) { # send a SIGKILL
kill('KILL',$pid) or $! == ESRCH or warn "Can't SIGKILL $pid: $!";
$waittime{$pid} = 0;
} elsif (kill(0,$pid)) { # process is still there
} elsif ($! != ESRCH) { # problem?
warn "Can't check process $pid: $!";
} else { # no longer around
printf STDERR ("PID %s: %-11s successfully killed\n", $pid);
delete($waittime{$pid});
$pid = undef;
}
}
@killed = grep {defined} @killed;
printf STDERR ("Waiting for the process to terminate: %s\n",
join(', ',@killed)) if @killed;
}
$| = 1;
last if defined $repeatcount && $repeatcount <= 0;
Time::HiRes::sleep($wakeuptime) if $wakeuptime > 0;
} # forever
$normal_termination = 1;
END {
if (defined $db) {
$cursor->c_close if defined $cursor; # ignoring status
$db->db_close==0 or die "BDB db_close error: $BerkeleyDB::Error $!";
}
print STDERR "exited\n" if !$normal_termination;
}
|