/usr/sbin/sendpage is in sendpage-server 1.0.3-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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eval 'exec /usr/bin/perl -S $0 ${1+"$@"}'
if 0; # not running under some shell
#
# sendpage is the tool that will handle all the paging functions
#
# $Id: sendpage 316 2008-01-03 20:21:19Z keescook $
#
# Copyright (C) 2000-2004 Kees Cook
# kees@outflux.net, http://outflux.net/
#
# 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.
# http://www.gnu.org/copyleft/gpl.html
=head1 NAME
sendpage - listen for pages via SNPP, and send pages via modem
=head1 SYNOPSIS
sendpage [OPTIONS] [recipient ...]
=head1 OPTIONS
=over 4
=item -bd
Start sendpage in "daemon mode" where it will start all the Paging
Central queues and wait for pages to be delivered. When sendpage
runs as a daemon, it must be running as the 'sendpage' user as specified
in the sendpage.cf file.
=item -bp
Display all the pages waiting in the Paging Central queues.
=item -bv
Try to expand the "recipient" name, using the recipient aliases specified
in the configuration file.
=item -bs
Shutdown the running sendpage daemon and all its children. If a Paging
Central is in the middle of delivering a page, it will finish up and
exit as soon as its current page is handled.
=item -br
This will send a SIGHUP to the master daemon. When the master gets the
SIGHUP, it will re-read its configuration file, and restart all the
Paging Centrals. It will wait for any busy Paging Centrals to finish
before continuing.
=item -bq
This displays the state of the running daemons: Running or Not running.
If a pid file is stale (the file exists, but the process doesn't), it
will mark that pid as "Stale".
=item -q[R pc]
This will send a SIGUSR1 signal to either the master daemon, or,
if the Paging Central is specified, just that Paging Central in particular.
When the master gets a SIGUSR1, it will send it to each of the running Paging
Centrals. If the Paging Central is not busy, it will immediately start a
queue run.
=item -C FILE
Read the configuration file FILE instead of the default /etc/sendpage/sendpage.cf
=item -h
Display a summary of all the available command line options.
=item -d
Turn on debugging (like "debug=true" in /etc/sendpage/sendpage.cf)
=item -f USER
Show that the sent page is coming from USER. Default is the current user.
=item -m MESSAGE
Send the given MESSAGE instead of reading text from stdin.
=item -n
Do not notify the 'from' user about the status of the page.
=back
=head1 DESCRIPTION
Sendpage can run as the delivery agent, or as a client to insert a page
into the paging queue. For the various command-line arguments,
the idea here was to use sendmail-style arguments where I can, not to
fully implement every option that sendmail has. I just want the
learning curve of sendpage to be small for people already familiar
with sendmail.
=head1 FILES
=over 4
=item F</etc/sendpage/sendpage.cf>
Default location for sendpage.cf, which holds all the configuration
information for sendpage, including Paging Central definitions,
recipients, and various other behaviors.
=item F</var/spool/sendpage>
Default directory for all the Paging Central queues and pid files.
=item F</var/lock>
Default directory to keep the UUCP-style device locks.
=back
=head1 AUTHOR
Kees Cook <kees@outflux.net>
=head1 BUGS
Oh, I bet this code is crawling with them. :) I've done my best to
test this code, but I'm only one person. If you find strange behavior,
please let me know.
=head1 COPYRIGHT
sendpage is free software; it can be used under the terms of the GNU
General Public License.
=head1 SEE ALSO
perl(1), kill(1), Device::SerialPort(3), Mail::Send(3),
Sendpage::KeesConf(3), Sendpage::KeesLog(3),
Sendpage::Modem(3), Sendpage::PagingCentral(3), Sendpage::PageQueue(3),
Sendpage::Page(3), Sendpage::Recipient(3), Sendpage::Queue(3)
=cut
# we need at least this version. FIXME: I forgot why, though. :P
require 5.006;
# Global variables;
$VERSION=1.000_003; # our version!
$VERSION_human=sprintf("%d.%d.%d",
int(${VERSION}),
substr((${VERSION}=~/^\d\.(\d+)$/)[0],0,3),
substr((${VERSION}=~/^\d\.(\d+)$/)[0],3,3));
my $config; # holds the configuration object
undef $log; # holds logging object
my $db; # holds the db object, if used
# Module-global variables
my %CHILDREN; # who the childrens are
my $SHUTDOWN; # when to shutdown
my $RELOAD; # when we're reloading
my $DEBUG; # for debugging
my $DEBUG_SELECT;# for debugging select loop
my $DEBUG_SNPP; # for debugging SNPP issues
my %opts; # holds the command line args hash
undef @modems; # List of available modems
undef @pcs; # List of enabled PCs
# Global socket variables
undef $server; # holds the SNPP server obj
undef $s; # holds our Select set
undef %CNXNS; # List of open SNPP client pipes by filehandle
undef %PIPES; # List of open SNPP client pipes by PID
# Global queue run variables
my $PC; # holds name of PC for queue runners
my $sleeptime; # holds sleeptime for next queue delay
# FIXME: load modules in a nice error-correcting fashion (borrow from mr house)
use POSIX;
use Getopt::Std;
use Sendpage::Modem;
use Sendpage::KeesConf;
use Sendpage::PagingCentral;
use Sendpage::PageQueue;
use Sendpage::Page;
use Sendpage::Recipient;
use Sendpage::KeesLog;
use Sendpage::SNPPServer;
use Sendpage::Db;
use Socket;
use IO::Select;
use IO::Pipe;
use Sys::Hostname;
sub Usage {
die "Usage: $0 [OPTIONS] [alias ...]
version $VERSION_human
General Options
-h you're reading it. :)
-d turn debug on
-C FILE use FILE as the sendpage.cf file
-t test all configured modems
Daemon Options
-bd run in daemon mode
-bp display the queues
-bv verify addresses
-bs shutdown server
-br have server reload configurations
-bq query state of daemons
-q force a queue run
-qR PC force a queue run only for the PC paging central
Page Queuing Options
-f USER force page to be from USER (default is current user)
-m MESSAGE message to send (reads from stdin by default)
-n no email status sent to 'from' for this page
";
}
# Start logging immediately
$log=Sendpage::KeesLog->new(Syslog => 0);
# get our options
if (!getopts('htvdqC:b:R:f:m:n',\%opts) || $opts{h}) {
Usage();
}
# build default configuration, with any command line info
$config=initConfig(\%opts);
# load configuration
Initialize();
# Restart logging
$log->reconfig(Syslog => $config->get("syslog"),
Opts => $config->get("syslog-opt"),
Facility => $config->get("syslog-facility"),
MinLevel => $config->get("syslog-minlevel"),
);
# Mode of operation selection
#
# Modes:
# - daemon (spawn queue runners, listen for pages)
# - queue display
# - address expansion
# - force a queue run (optionally for only a certain PC)
#
if ($opts{t}) {
ModemInit();
exit(0);
}
if ($opts{b}) {
QueryDaemons(1) if ($opts{b} eq "q");
SendHUP() if ($opts{b} eq "r");
ShutdownEverything() if ($opts{b} eq "s");
BecomeDaemon() if ($opts{b} eq "d");
DisplayQueue() if ($opts{b} eq "p");
VerifyAddress(@ARGV) if ($opts{b} eq "v");
warn "Unknown run mode: '$opts{b}'\n";
Usage();
}
if ($opts{q}) {
my $ret=SendSignal('USR1',$opts{R} ? $opts{R} : "");
# FIXME: should run the queue by hand if no one else can
die "Failed to notify queue manager: $!\nMaybe you should run me with -bd?\n" if (!defined($ret) || $ret != 0);
exit;
}
die "Must be root to write pages directly to queue. Please use 'snpp' instead.\n"
if (!VerifyIdentities());
DropPrivs();
if (!@ARGV) {
Usage();
}
else {
my $msg=$opts{m};
# it's time to write a file directly to the queue
# who is it from?
if (!defined($opts{f}) && !$opts{n}) {
$opts{f}=scalar(getpwuid($<))."\@";
$opts{f}.=hostname();
}
if (!defined($msg)) {
my $line;
while ($line=<STDIN>) {
$msg.=$line;
}
}
# generate errors to the stderr
ArrayDig(@ARGV);
# turn on syslog for queue logging
$log->on();
# try to write the pages
exit Sendpage::SNPPServer->write_queued_pages(undef,$opts{f},$msg,
$config,$log,$DEBUG,@ARGV);
}
sub QueryDaemons {
my($display)=@_;
my(@check,$pc,$pid,$state,$running,$disabled);
$running=1;
@check=@pcs;
unshift(@check,"");
foreach $pc (@check) {
if ($pc ne "" && $config->get("pc:$pc\@enabled")==0) {
$disabled=1;
}
else {
$disabled=0;
}
$pid=PidOf($pc,1);
if ($pid==0) {
$state="Not running";
undef $running;
}
else {
undef $!;
kill 0, $pid;
if ($! == ESRCH) {
$state="Stale: not running";
undef $running;
}
else {
$state="Running";
}
}
printf("%-6d %20s : %s%s\n",$pid,
($pc eq "") ? 'Queue Manager' : $pc, $state,
$disabled ? " (disabled)" : "")
if ($display);
}
exit(!defined($running)) if ($display);
return $running;
}
sub SendHUP {
my $ret=SendSignal('HUP',"");
die "Failed to notify queue manager: $!\n" if (!defined($ret) || $ret != 0);
exit;
}
sub ShutdownEverything {
# there's no need for individual killing is there?
#my $ret=SendSignal('QUIT',$opts{R} ? $opts{R} : "");
my $ret=SendSignal('QUIT',"");
warn "Failed to notify queue manager: $!\n" if (!defined($ret) || $ret != 0);
exit;
}
sub Initialize {
&loadConfig();
$DEBUG=$config->get("debug");
$DEBUG_SELECT=$config->get("debug-select");
$DEBUG_SNPP=$config->get("debug-snpp");
@pcs=$config->instances("pc");
undef %pcs; grep($pcs{$_}=1,@pcs);
@modems=$config->instances("modem");
}
# plops down a pid file
sub RecordPidFile {
my($name,$pid)=@_;
my($file);
$name=".$name" if ($name ne "");
$file=$config->get("pidfileprefix").$name.".pid";
open(FILE,">$file") || $log->do('err',"Cannot write to '$file': %s",$!);
print FILE $pid,"\n";
close(FILE);
}
# deletes a pid file by name
sub YankPidFile {
my($name)=@_;
my($file);
$name=".$name" if ($name ne "");
$file=$config->get("pidfileprefix").$name.".pid";
unlink($file) || $log->do('err',"Cannot unlink '$file': %s",$!);
}
# sends a signal to the specified PID
# returns non-0 on failure
sub SendSignal {
my($sig,$pid)=@_;
if ($pid !~ /^\d+$/) {
$pid=PidOf($pid);
}
return undef if ($pid == 0);
$log->do('debug',"signalling '$sig' to pid '$pid'") if ($DEBUG);
undef $!;
kill $sig, $pid;
return $!+0;
}
# tries to find the PID of a certain sendpage
# return PID, or 0 or failure
sub PidOf {
my($name,$quiet)=@_;
my($file,$pid);
if ($name ne "") {
if (!defined($pcs{$name})) {
$log->do('warning',"No such PC '$name'");
return 0;
}
$name=".$name";
}
$pid=0;
$file=$config->get("pidfileprefix").$name.".pid";
if (-f $file) {
my $line;
open(FILE,"<$file") || $log->do('err',"Cannot read '$file': %s",$!);
chomp($line=<FILE>);
# this is used to untaint for a sendpage -q
if ($line=~/^(\d+)$/) {
$pid=$1;
}
close(FILE);
}
else {
my $warning=sprintf("No pid file found for sendpage%s!",
$name);
$log->do('warning',"%s",$warning) if (!defined($quiet));
}
return ($pid+0);
}
sub NiceShutdown {
$SIG{QUIT}=$SIG{INT}=DEFAULT;
$SHUTDOWN=1;
if ($PC eq "") {
my($pc,$cnxn);
# Shutdown PCs
foreach $pc (@pcs) {
if ($config->get("pc:$pc\@enabled")==0) {
next;
}
$log->do('debug',"Signalling '$pc' ...") if ($DEBUG);
SendSignal('QUIT',$pc);
}
# Shut down SNPP clients
foreach $cnxn (keys %PIPES) {
$log->do('debug',"Signalling SNPP client '$cnxn' ...")
if ($DEBUG);
SendSignal('QUIT',$cnxn);
}
}
else {
$log->do('debug',"Shutting down nicely: '$PC'") if ($DEBUG);
}
}
sub ImmediateShutdown {
$SIG{TERM}=DEFAULT;
$log->do('debug',"Shutting down immediately") if ($DEBUG);
exit(0);
}
sub QueueRun {
#$log->do('debug',"Pid $$ heard signal USR1") if ($DEBUG);
# we need to signal all the PC's if we're master
if ($PC eq "") {
my $pc;
foreach $pc (@pcs) {
if ($config->get("pc:$pc\@enabled")==0) {
next;
}
$log->do('debug',"Signalling '$pc' ...") if ($DEBUG);
SendSignal('USR1',$pc);
}
}
else {
# perform queue run
$log->do('debug',"QueueRun requested for '$PC' ...")
if ($DEBUG);
# if we get a request for this DURING a queue run, we
# should immediately rescan our queue. To do this,
# we set our next sleeptime to 0
$sleeptime=0;
}
}
sub DisplayQueue {
my($queue, $waiting, $page, $recip);
foreach $pc (@pcs) {
$queue=Sendpage::PageQueue->new($config,$config->get("queuedir")."/$pc");
if (($waiting=$queue->ready())>-1) {
print "\nin the '$pc' queue: ".($waiting+1)."\n";
while (defined($page=$queue->getPage())) {
print "\tqueue filename: ".$queue->file()."\n";
print "\tdeliverable: ".$page->deliverable()."\n";
print "\tattempts: ".$page->attempts()."\n";
print "\tfrom: ".$page->option('from')."\n"
if ($page->option('from') ne "");
for ($page->reset(), $page->next();
defined($recip=$page->recip());
$page->next()) {
print "\tdest: '".$recip->name()."' (pin '".$recip->pin()."', email '".$recip->datum('email-cc')."')\n";
}
$queue->fileDone();
print "\n";
}
}
}
exit(0);
}
sub VerifyAddress {
my ($fail,@recips);
($fail,@recips)=ArrayDig(@ARGV);
if ($fail != 0) {
exit(1);
}
foreach $recip (@recips) {
print "deliverable: ".$recip->name()." as ".$recip->pin().
" via ".$recip->pc()." (email is '".$recip->datum('email-cc')."')\n";
}
exit(0);
}
sub ModemInit {
my $modref;
# test modems, keeping functioning ones in a list for the PCs to pick
if ($DEBUG) {
grep($log->do('debug',"found listing for modem: $_"),@modems);
grep($log->do('debug',"found listing for pc: $_"),@pcs);
}
# should be limit which modems we're using?
if (defined($modref=$config->get("modems",1))) {
# we should limit the modem list
@modems=@{ $modref };
grep($log->do('debug',"using specified modem: $_"),@modems)
if ($DEBUG);
}
else {
# pull from instance list
@modems=$config->instances("modem");
}
# check the modems
@modems=verifyModems(@modems);
grep($log->do('debug',"found functioning modem: $_"),@modems)
if ($DEBUG);
$log->do('alert',"no functioning modems!") if (!defined($modems[0]));
}
sub BlockSignals {
# define the signals to block
my $sigset = POSIX::SigSet->new(SIGINT, SIGTERM, SIGQUIT,
SIGUSR1, SIGHUP, SIGPIPE);
# start blocking signals
unless (defined sigprocmask(SIG_BLOCK, $sigset)) {
$log->do('alert',"Could not block signals!");
}
return $sigset;
}
sub UnblockSignals {
# define the signals to block
my $sigset = POSIX::SigSet->new(SIGINT, SIGTERM, SIGQUIT,
SIGUSR1, SIGHUP, SIGPIPE);
# stop blocking signals
unless (defined sigprocmask(SIG_UNBLOCK, $sigset)) {
$log->do('alert',"Could not unblock signals!");
}
}
# start one or all the children
sub SpawnChildren {
my($which)=@_;
my($pid,$pc,@which,$sigset);
if (defined($which)) {
undef @which;
push(@which,$which);
}
else {
@which=@pcs;
undef %CHILDREN;
undef %STARTED;
$log->do('info',"starting Queue Manager (sendpage v$VERSION_human)");
}
# there was a race condition here between the fork
# and the call to "SignalInit" where a child could
# think it was still the manager, and receive yet
# another signal, and act on it. Now we block signals.
# spawn PCs
foreach $pc (@which) {
if ($config->get("pc:$pc\@enabled")==0) {
next;
}
# start blocking signals
$sigset=&BlockSignals();
$pid=fork();
if ($pid<0) {
# failure
$log->do('emerg',"Cripes! Cannot spawn process: %s",$!);
}
elsif ($pid>0) {
# parent
$log->do('debug',"spawned child: $pid for PC '$pc'")
if ($DEBUG);
$CHILDREN{$pid}=$pc;
$STARTED{$pc}=time;
RecordPidFile($pc,$pid);
}
else {
# child
# set up
&DropPrivs(1);
&SignalInit();
$log->do('debug',"I am child: $$ for PC '$pc'")
if ($DEBUG);
&CheckFDs();
&StartQueue($pc,$sigset);
$log->do('crit',"PC '$pc' stopped processing! ".
"Whoops, that can't happen!");
exit(1);
}
# stop blocking signals
&UnblockSignals($sigset);
}
}
# should they get serial port rights?
sub DropPrivs {
my ($serial)=@_;
my $grouplist="nobody";
if (!defined($setUID)) {
$log->do('crit',"Effective User ID unknown -- aborting!");
exit(1);
}
if (defined($serial)) {
if (!defined($lockGID)) {
$log->do('crit',"Effective Group ID for locking unknown -- aborting!");
exit(1);
}
if (!defined($ttyGID)) {
$log->do('crit',"Effective Group ID for tty read/write unknown -- aborting!");
exit(1);
}
$grouplist="$lockGID $ttyGID";
}
$(=$)=$grouplist;
if ($( != $grouplist) {
$log->do('crit',"Could not setgid to '$grouplist': %s -- aborting!",$!);
}
$<=$>=$setUID;
if ($< != $setUID) {
$log->do('crit',"Could not setuid: %s -- aborting!",$!);
}
}
# Debugging routine to check on the state of open file descriptors.
# I used this will tracking weird problems with the select loop.
sub CheckFDs
{
return unless ($DEBUG);
for (my $fd = 0; $fd < 10; $fd ++ ) {
my $fh = IO::Handle->new_from_fd( $fd, "r" );
if (defined($fh)) {
$log->do('debug',"$fd: open");
}
# else {
# $log->do('debug',"$fd: $!");
# }
}
}
sub Respawn {
my($undef,$forwarded) = @_;
my($pid,$pc,$now);
$!=0;
if ($forwarded) {
$pid=$forwarded;
}
else {
$pid=wait;
}
# quit out if we're done (wait will sleep)
return if ($SHUTDOWN==1);
if ($pid==-1) {
if ($!==ECHILD) {
$log->do('warning',"No children on SIGCHLD?! Shutting down...");
$SHUTDOWN=1;
return;
}
else {
$log->do('warning',"Oops: waitpid spat totally unexpected error: %s",$!);
return;
}
}
if (defined($CHILDREN{$pid})) {
$log->do('debug', "pid $pid died: '".$CHILDREN{$pid}."'")
if ($DEBUG);
$pc=$CHILDREN{$pid};
$now=time;
# restart within the same 10 seconds??
if ($now<($STARTED{$pc}+10)) {
$log->do('alert',"Ugly nasty problem with $CHILDREN{$pid} queue manager!");
$log->do('alert',"The same PC has died twice rather quickly. Shutting it down.");
}
else {
$log->do('err',"Whoa! The '$CHILDREN{$pid}' PC died unexpectedly -- restarting it.");
SpawnChildren($CHILDREN{$pid});
}
}
elsif (defined($PIPES{$pid})) {
$log->do('debug',"SNPP connection (pid $pid) finished") if ($DEBUG_SNPP);
# Only handle PID shutdown here
# $log->do('debug',"(select: removing pipe ".fileno($PIPES{$pid}).")")
# if ($DEBUG_SELECT);
# $s->remove($PIPES{$pid}); # don't select on this handle anymore
# PipeShutdownPipe($PIPES{$pid});
PipeShutdownPid($pid);
}
else {
# defunct children? no! bastards! :)
$log->do('warning',"Bastard child detected! Unknown PID '$pid' was reaped.");
}
}
sub SignalInit {
# set up signal handlers for children
#$SIG{'CHLD'}='IGNORE';
$SIG{'HUP'}='IGNORE';
$SIG{'USR1'}='IGNORE';
$SIG{'PIPE'} = 'IGNORE';
$SIG{'INT'}=$SIG{'QUIT'}=\&NiceShutdown;
$SIG{'TERM'}=\&ImmediateShutdown;
}
sub VerifyIdentities {
my($user,$group,$name);
# check for our setuid user
$user=$config->get('user');
($name,undef,$setUID)=getpwnam($user);
if (!defined($name)) {
$log->do('crit',"There is no such user named '$user'! Aborting...");
return undef;
}
# check for our locking group
$group=$config->get('group-lock');
($name,undef,$lockGID)=getgrnam($group);
if (!defined($name)) {
$log->do('crit',"There is no such group named '$group'! Aborting...");
return undef;
}
# check for our tty r/w group
$group=$config->get('group-tty');
($name,undef,$ttyGID)=getgrnam($group);
if (!defined($name)) {
$log->do('crit',"There is no such group named '$group'! Aborting...");
return undef;
}
# are we root?
if (0 != $<) {
return undef;
}
return 1;
}
sub BecomeDaemon {
# check to see if we're already running
if (QueryDaemons()) {
warn "Already running:\n";
QueryDaemons(1);
}
if (!VerifyIdentities()) {
$log->do('crit',"Must be running as 'root' to daemonize! Aborting...");
exit(1);
}
# daemon mode starts here
ModemInit();
SignalInit();
$PC="";
# close file handles. (unless debugging)
close(STDIN);
close(STDOUT);
close(STDERR) unless ($DEBUG || $DEBUG_SELECT || $DEBUG_SNPP);
# Become a daemon
my $pid = fork;
exit if $pid;
die "Couldn't fork: $!" unless defined($pid);
POSIX::setsid() or die "Can't start a new session: $!";
# reconfig, and reopen syslog connection
$log->reconfig(Syslog => $config->get("syslog"),
Opts => $config->get("syslog-opt"),
Facility => $config->get("syslog-facility"),
MinLevel => $config->get("syslog-minlevel"),
);
$log->on();
$0="sendpage: accepting connections";
$SHUTDOWN=0;
RecordPidFile($PC,$$);
# build new loop selector
$s=IO::Select->new();
# start the queue runners
SpawnChildren();
# listen for USR1 to send USR1s
$SIG{'USR1'} = \&QueueRun;
# listen for reload info
$SIG{'HUP'}=\&Reload;
# listen for children death
#$SIG{'CHLD'}=\&Respawn;
# start the SNPP stuff now
StartSNPP();
# Enter the main processing loop
MainLoop();
die "parent died: this should never have happened: $!\n";
}
sub initSNPP {
my $host=$config->get("snpp-addr");
my $port=$config->get("snpp-port");
# need to use "create" so that the "accept"s don't call the constructor
$server=Sendpage::SNPPServer->create(Addr => $host, Port => $port);
if (defined($server)) {
$log->do('debug',"SNPP listener running on %s:%d",
$server->sockhost,
$server->sockport) if ($DEBUG_SNPP);
}
else {
$log->do('crit',"SNPP listener for '%s:%s' failed: %s",
$host,$port,$!);
}
# Expand our snpp ACLs so we don't have to during each connection
@ACLs=();
my $item;
foreach $item (@{$config->get("snpp-acl")}) {
my ($netmask,$way) = split(/:/,$item,2);
$way=uc($way);
my ($net_str,$mask_str) = split(/\//,$netmask,2);
$log->do('debug',"ACL loaded: '$net_str'/'$mask_str' is '$way'")
if ($DEBUG_SNPP);
my $net = inet_aton($net_str);
my $mask = inet_aton($mask_str);
push(@ACLs,[ $net, $mask, $net_str, ($way eq "ALLOW") ]);
}
}
sub StopSNPP {
$log->do('debug',"SNPP listeners shutting down")
if ($DEBUG_SNPP);
$log->do('debug',"(select: dropping ".fileno($server).")")
if ($DEBUG_SELECT);
$s->remove($server);
$server->close();
undef $server;
}
sub StartSNPP {
$log->do('info',"starting SNPP listeners");
initSNPP();
if (defined($server)) {
$log->do('debug',"(select: adding server ".fileno($server).")")
if ($DEBUG_SELECT);
$s->add($server);
}
}
sub RestartSNPP {
StopSNPP();
StartSNPP();
}
# FIXME: have all the ACLs pre-expanded for us...
sub IPAllowed {
my $sock=shift;
# Verify that this connection is allowed
my $peer=$sock->peerhost();
my $other_end = $sock->peername();
if (!defined($other_end)) {
$log->do('alert',"SNPP client '$peer' failed getpeername!");
return undef;
}
my ($port, $iaddr) = unpack_sockaddr_in($other_end);
my $other_ip_address = inet_ntoa($iaddr);
# Compare this IP address to our ACL list
my $item;
my $allowed=0;
my $found=0;
foreach $item (@ACLs) {
my ($net,$mask,$net_str,$allow) = @{$item};
# Drop the peer IP through the mask
my $net_check = ($iaddr & $mask);
my $check_str=inet_ntoa($net_check);
if ($DEBUG_SNPP) {
my $mask_str=inet_ntoa($mask);
$log->do('debug',"ip: '$peer' mask: '$mask_str' ".
"masked: '$check_str' net: '$net_str'");
}
# if result is our network, we have a hit
if ($check_str eq $net_str) {
$found=1;
$log->do('debug', "Matched ACL") if ($DEBUG_SNPP);
if ($allow==1) {
$allowed=1;
}
# if not allow, then reject
last;
}
}
if ($DEBUG_SNPP && $found == 0) {
$log->do('debug',"No ACL matched '$peer'");
}
if ($allowed != 1) {
$sock->command("421 Connection denied");
$log->do('info',"SNPP client '$peer' rejected");
return undef;
}
return 1;
}
# This main loop cycles through all the pending socket connections:
# - SNPP listeners to spawn SNPP clients
# - SNPP client pipes to start PC queue runs
sub MainLoop {
my($fh,$read,$exc,$pipe,$sigset,$match,$pid);
while ($SHUTDOWN!=1) {
if (!defined($server)) {
$log->do('crit',"Cannot start any SNPP listeners -- ".
"aborting!");
NiceShutdown();
YankPidFile("");
exit(1);
}
# reset my containers
$read=$exc=undef;
if ($DEBUG_SELECT) {
grep($log->do('debug',"select set: ".fileno($_)),
$s->handles());
}
# handle children dying
while (($pid = waitpid(-1,&WNOHANG))>0) {
&Respawn('',$pid);
}
if ($s->count()<1) {
$log->do('warning',"Whoa! Nothing left in the select array -- restarting SNPP!");
RestartSNPP();
}
$log->do('debug',"(select starting)") if ($DEBUG_SELECT);
$match=0;
$!=0;
my @events = IO::Select->select($s,undef,$s,1.0);
if (scalar(@events)==0 && $! != 0) {
if ($! == &EINTR()) {
$match=1;
$log->do('debug',"select loop: %s -- continuing",$!)
if ($DEBUG_SELECT);
}
else {
$log->do('warning',"select loop failed: %s",$!);
}
}
$log->do('debug',"(select finished)") if ($DEBUG_SELECT);
($read,undef,$exc)=@events;
foreach $fh (@$read) {
# Handle a new SNPP connection
if ($fh == $server) {
my $pid;
my $sock = $fh->accept;
$match=1;
if (!defined($sock)) {
$log->do('err',"SNPP accept: %s",$!);
next;
}
$log->do('debug',"got connection from %s",
$sock->peerhost) if ($DEBUG_SNPP);
if (!IPAllowed($sock)) {
close($sock);
next;
}
$pipe = new IO::Pipe;
$sigset=&BlockSignals();
if(($pid = fork())>0) {
# Parent
# close other side of pipe
$pipe->reader();
# close our forked socket
close($sock);
$log->do('debug',"(select: adding pipe ".fileno($pipe).")")
if ($DEBUG_SELECT);
$s->add($pipe);
PipeRemember($pipe,$pid);
}
elsif($pid==0) {
# Child
# close other side of pipe
$pipe->writer();
$pipe->autoflush(1);
# close master socket
close $fh;
# FIXME: close ALL snpp listeners
# set up identity
$PC="SNPP client";
$0="sendpage: SNPP client: ".
$sock->peerhost;
&DropPrivs();
&SignalInit();
$log->do('debug',"I am child: $$ for SNPP")
if ($DEBUG);
&CheckFDs();
# we will unblock signals in
# the snpp handler
$sock->HandleSNPP(
"SNPP Sendpage $VERSION_human",
$pipe, $config, $log,
$DEBUG_SNPP, $sigset);
$log->do('debug',
"leaving SNPP client cnxn")
if ($DEBUG_SNPP);
exit(0);
}
else {
$log->do('err',"SNPP fork: %s",$!);
# error on fork
close($sock);
}
&UnblockSignals($sigset);
}
# Handle SNPP client notifications
elsif (defined($pid=$CNXNS{$fh})) {
$match=1;
# is this pipe shutdown?
if ($fh->eof()) {
PipeShutdownPipe($fh);
$log->do('debug',"(select: removing pipe ".fileno($fh).")")
if ($DEBUG_SELECT);
$s->remove($fh);
close($fh);
}
# something is readable from a pipe
else {
chomp(my $pc=<$fh>);
SendSignal('USR1',$pc) if ($pc ne "");
}
}
else {
$match=1;
# toss any straggling pipes
$log->do('debug',"(select: removing stale selectable file handle: ".fileno($fh).")")
if ($DEBUG_SELECT);
$s->remove($fh);
close($fh);
}
}
# Deal with exceptions
foreach $fh (@$exc) {
if ($fh == $server) {
$match=1;
$log->do('err',"Whoa! Server socket took a hit! -- reopening it");
RestartSNPP();
}
else {
$match=1;
$log->do('warning',"SNPP connection took a hit!");
$log->do('debug',"(select: removing server ".fileno($fh).")")
if ($DEBUG_SELECT);
$s->remove($fh);
close($fh);
}
}
# if ($match==0) {
# $log->do('warning',"Select produced an unmatched file descriptor?!");
# }
}
$log->do('info',"stopping Queue Manager and SNPP listeners (sendpage v$VERSION_human)");
StopSNPP();
YankPidFile("");
exit(0);
}
sub PipeShutdownPipe {
my $pipe = shift;
delete $CNXNS{$pipe};
}
sub PipeShutdownPid {
my $pid = shift;
delete $PIPES{$pid};
}
sub PipeRemember {
my($pipe,$pid)=@_;
$PIPES{$pid}=$pipe;
$CNXNS{$pipe}=$pid;
}
sub StartQueue {
my($name,$sigset)=@_;
# Queue-runner variables
my($rundelay,$pc,$waiting);
$rundelay=$config->get("pc:${name}\@rundelay");
#warn "run delay: $rundelay\n";
$PC=$name;
$pc=Sendpage::PagingCentral->new($config,$PC,\@modems);
# rename myself
$0="sendpage: $PC queue";
# set up handler
$SIG{'USR1'} = \&QueueRun;
$log->do('debug', "starting queue runs for '$PC'") if ($DEBUG);
my $dir=$config->get("queuedir")."/$PC";
if (! -d $dir) {
if (!mkdir($dir,0700)) {
$log->do('alert',"Cannot mkdir '$dir': $!");
exit(1);
}
}
$queue=Sendpage::PageQueue->new($config, $dir);
if (!defined($queue)) {
$log->do('alert',"Failed to open queue for '$PC' -- exiting");
exit(1);
}
# stop blocking signals
&UnblockSignals($sigset);
while ($SHUTDOWN!=1) {
# reset our sleep time
$sleeptime=$rundelay;
# search queue, gathering pages
$waiting=$queue->ready()+1;
if ($waiting>0) {
while (defined($page=$queue->getPage())) {
if ($page->deliverable()) {
$pc->deliver($page);
if ($page->has_recips()) {
$log->do('debug',"$PC: rewriting page to queue") if ($DEBUG);
# something requires rerun
$queue->writePage($page);
$queue->fileDone();
}
else {
$log->do('debug',"$PC: tossing queue file") if ($DEBUG);
$queue->fileToss();
}
}
else {
$queue->fileDone();
}
}
}
# don't hang up if need to rescan our queue
if ($sleeptime != 0) {
$pc->disconnect();
# strange eval needed to wake up on USR1 signals
eval {
local $SIG{USR1} = sub { die "usr1\n" };
# pause for the next queue run
sleep($sleeptime);
};
if ($@) {
QueueRun();
}
else {
# nothing: we're done sleeping
}
}
# check and see if we should shutdown (parent is init)
if (!$SHUTDOWN && getppid==1) {
$log->do('err',"Parent process died -- aborting");
$SHUTDOWN=1;
}
}
$log->do('debug', "Queue runner for '$PC' shutting down") if ($DEBUG);
# remove our pid file
YankPidFile($PC);
exit(0);
}
sub DoNothing {
# no code here, but just have HAVING a signal handler, I'll wake up
# during a SIGCHLD for my waitpid
}
sub Reload {
my($pid);
$log->do('info', "initiating reload ...");
if ($PC eq "") {
my %OLD=%CHILDREN;
undef %CHILDREN;
undef %STARTED;
StopSNPP();
$RELOAD=1;
my $finished=0;
# shutdown the PCs
foreach $pc (@pcs) {
if ($config->get("pc:$pc\@enabled")==0) {
next;
}
$log->do('debug', "Stopping '$pc' ...") if ($DEBUG);
SendSignal('QUIT',$pc);
$finished++;
}
# shut down all the SNPP clients too
foreach $pc (keys %PIPES) {
$log->do('debug',"Stopping SNPP client '$pc' ...")
if ($DEBUG);
SendSignal('QUIT',$pc);
$finished++;
}
# Note:
# can't do "ModemInit" until everyone is dead because we
# need to re-init (to validate) all the modems.
my @keys=keys %OLD;
undef $!;
$log->do('debug', "Waiting for $finished PCs/SNPPs to die off...") if ($DEBUG);
while ($finished!=0) {
$pid=wait;
if ($pid==-1) {
if ($!==ECHILD) {
$log->do('warning',"Ran out of children too early?! Continuing anyway...");
$finished=0;
}
else {
$log->do('warning',"Oops: waitpid spat totally unexpected error: %s",$!);
}
}
elsif ($pid==0) {
$log->do('warning',"Got 0 pid somehow");
}
elsif (defined($OLD{$pid})) {
$log->do('debug', "Letting old PC '$OLD{$pid}' rest in peace") if ($DEBUG);
$finished--;
}
elsif (defined($PIPES{$pid})) {
PipeShutdownPid($pid);
$log->do('debug',"SNPP connection (pid $pid) finished") if ($DEBUG || $DEBUG_SNPP);
$finished--;
}
else {
$log->do('warning',"Strange, I got an unknown child PID: '$pid'");
}
}
$log->do('debug', "Reinitializing...") if ($DEBUG);
$RELOAD=0;
# reload our configurations
Initialize();
ModemInit();
# Restart logging
$log->reconfig(Syslog => $config->get("syslog"),
Opts => $config->get("syslog-opt"),
Facility => $config->get("syslog-facility"),
MinLevel => $config->get("syslog-minlevel"),
);
$log->on();
# Start up all our children
SpawnChildren();
StartSNPP();
}
else {
$log->do('warning',"Weird: PC '$PC' caught a Reload signal somehow.");
}
}
sub verifyModems {
my (@totest) = @_;
# find all our valid modems, keeping those that are either in use (e.g.
# we have been HUPd) or respond to initialization
my $m;
my $result;
my $modem;
my @okay;
foreach $modem (@totest) {
$m=Sendpage::Modem->new(Name => $modem,
Dev => $config->get("modem:${modem}\@dev"),
Lockprefix => $config->get("lockprefix"),
Debug => $config->get("modem:${modem}\@debug"),
Log => $log,
Baud => $config->get("modem:${modem}\@baud"),
Parity => $config->get("modem:${modem}\@parity"),
StrictParity => $config->get("modem:${modem}\@strict-parity"),
Data => $config->get("modem:${modem}\@data"),
Stop => $config->get("modem:${modem}\@stop"),
Flow => $config->get("modem:${modem}\@flow"),
Init => $config->get("modem:${modem}\@init"),
InitOK => $config->get("modem:${modem}\@initok"),
InitWait => $config->get("modem:${modem}\@initwait"),
InitRetry => $config->get("modem:${modem}\@initretries"),
Error => $config->get("modem:${modem}\@error"),
Dial => $config->get("modem:${modem}\@dial"),
DialOK => $config->get("modem:${modem}\@dialok"),
DialWait => $config->get("modem:${modem}\@dialwait"),
DialRetry => $config->get("modem:${modem}\@dialretries"),
NoCarrier => $config->get("modem:${modem}\@no-carrier"),
DTRToggleTime => $config->get("modem:${modem}\@dtrtime"),
CarrierDetect => $config->get("modem:${modem}\@carrier-detect",1),
AreaCode => $config->get("modem:${modem}\@areacode",1),
LongDist => $config->get("modem:${modem}\@longdist"),
DialOut => $config->get("modem:${modem}\@dialout")
);
if (!defined($m)) {
$log->do('warning',"Cannot find modem '$modem'");
next;
}
if (!defined($result=$m->init())) {
$log->do('alert',"Cannot initialize modem '$modem'");
next;
}
undef $m;
push(@okay,$modem);
}
return @okay;
}
sub RecipDig {
my($recip,$seen)=@_;
my($dests,$one,%hash,$result);
if (!defined($seen)) {
my %holder;
$holder{$recip->name()}=1;
$seen=\%holder;
}
else {
$seen->{$recip->name()}++;
}
if ($seen->{$recip->name()}>1) {
$log->do('alert',"Loop found in alias expansion! Culprit recip: '%s'",
$recip->name());
exit(1);
}
# no alias, just return this one (leaf node)
return ($recip) if (!$recip->alias());
$log->do('debug',"from: '%s'",$recip->name())
if ($config->get("alias-debug"));
# get expanded list
$dests=$recip->dests();
# dump list
grep($log->do('debug',"starting with: '%s'",$_),@{$dests})
if ($config->get("alias-debug"));
# expand each one
foreach $one (@{ $dests }) {
$log->do('debug',"expanding: '%s'",$one) if ($config->get("alias-debug"));
my %copy=%{$seen};
my $r=Sendpage::Recipient->new($config,$db,$one,$recip->data());
if (!defined($r)) {
$log->do('err',"undeliverable: '%s'",$one);
}
else {
my @results=RecipDig($r,\%copy);
# add them to our hash
foreach $result (@results) {
$log->do('debug',"got: '%s'",$result->name())
if ($config->get("alias-debug"));
$hash{$result->name()}=$result;
}
}
}
undef @results;
foreach $one (keys %hash) {
$log->do('debug',"passing back: '%s'",$hash{$one}->name())
if ($config->get("alias-debug"));
push(@results,$hash{$one});
}
return @results;
}
sub ArrayDig {
my(@array)=@_;
my ($one,$result,%hash,@results,$fail);
# did a look-up fail?
$fail=0;
# dump list
grep($log->do('debug',"starting with: '%s'",$_),@array)
if ($config->get("alias-debug"));
# expand each one
foreach $one (@array) {
$log->do('debug',"expanding: '%s'",$one)
if ($config->get("alias-debug"));
my $recip=Sendpage::Recipient->new($config,$db,$one);
if (!defined($recip)) {
$log->do('err',"undeliverable: '%s'",$one);
$fail=1;
}
else {
my @results=RecipDig($recip);
# add them to our hash
foreach $result (@results) {
$log->do('debug',"got: '%s'",$result->name())
if ($config->get("alias-debug"));
$hash{$result->name()}=$result;
}
}
}
undef @results;
foreach $one (keys %hash) {
$log->do('debug',"passing back: '%s'",$hash{$one}->name())
if ($config->get("alias-debug"));
push(@results,$hash{$one});
}
return ($fail,@results);
}
sub initConfig {
my(%opts) = %{ $_[0] };
# set up default values (this is ignored by KeesConf...)
my %cfg=(
PEDANTIC=> 1,
CASE => 1,
CREATE => 1,
GLOBAL => {
DEFAULT => "<unset>",
ARGCOUNT => ARGCOUNT_ONE,
},
);
my $config = Sendpage::KeesConf->new(\%cfg);
# global variables
$config->define("dsn", { DEFAULT => "" });
$config->define("dbuser", { DEFAULT => "" });
$config->define("dbpass", { DEFAULT => "" });
$config->define("dbtable", { DEFAULT => "" });
$config->define("cfgfile", { DEFAULT => "/etc/sendpage/sendpage.cf" });
$config->define("pidfileprefix",{ DEFAULT => "/var/spool/sendpage/sendpage" });
$config->define("lockprefix",{ DEFAULT => "/var/lock/LCK.." });
$config->define("queuedir", { DEFAULT => "/var/spool/sendpage" });
$config->define("mail-agent", { DEFAULT => "sendmail" });
$config->define("user", { DEFAULT => "sendpage" });
$config->define("group-lock", { DEFAULT => "dialout" });
$config->define("group-tty", { DEFAULT => "tty" });
$config->define("page-daemon", { DEFAULT => "sendpage" });
$config->define("cc-on-error", { ARGCOUNT => 0, DEFAULT => 1 });
$config->define("modems", { ARGCOUNT => 2 });
$config->define("alias-debug", { ARGCOUNT => 0, DEFAULT => 0 });
$config->define("debug", { ARGCOUNT => 0,
DEFAULT => $opts{d} ? 1 : 0 });
$config->define("debug-select", { ARGCOUNT => 0,
DEFAULT => $opts{d} ? 1 : 0 });
$config->define("debug-snpp", { ARGCOUNT => 0,
DEFAULT => $opts{d} ? 1 : 0 });
# should the sender be notified of failures?
$config->define("fail-notify", { ARGCOUNT => 0, DEFAULT => 1 });
# sender should be notified how on every X temp fails? (0=never)
$config->define("tempfail-notify-after", { DEFAULT => 5 });
# how many temp fails does it take to produce a perm failure?
$config->define("max-tempfail", { DEFAULT => 20 });
# default email CC domain
$config->define("fallback-email-domain", { DEFAULT => undef });
# command to run after each successful or failed page
$config->define("completion-cmd", { UNSET => 1 });
# syslog toggle: strerr is used if not syslog
$config->define("syslog", { DEFAULT => 1, ARGCOUNT => 0 });
# syslog logopt words (any of "pid", "ndelay", "cons", "nowait")
$config->define("syslog-opt", { DEFAULT => "pid" });
# syslog facility to log with (one of "auth", "authpriv", "cron", "daemon",
# "kern", "local0" through "local7", "lpr", "mail", "news", "syslog",
# "user", or "uucp"
$config->define("syslog-facility", { DEFAULT => "daemon" });
# syslog reports internally range from debug through crit. Most people
# figure out how to configure sendpage to report debug, but don't change
# their syslog configs. So, we'll have a "minlevel". Anything below
# "minlevel" will be elevated to "minlevel" before being sent to syslog.
$config->define("syslog-minlevel", { DEFAULT => "info" });
# SNPP settings
$config->define("snpp-port", { DEFAULT => "444" });
$config->define("snpp-addr", { DEFAULT => "localhost" });
$config->define("snpp-acl", { ARGCOUNT => 2, DEFAULT => [ "127.0.0.1/255.255.255.255:ALLOW" ] });
# aliases defaults
#$config->define("recip:", { ARGCOUNT => 2 });
# where to send email-cc's of pages. none if blank, defaults to
# ALIAS @ fallback-email-domain if unset
$config->define("recip:email-cc", { UNSET => 1 });
# page is PIN@PC, alias is just the recip name again
$config->define("recip:dest", { ARGCOUNT => 2 });
# modem defaults
$config->define("modem:debug", { ARGCOUNT => 0,
DEFAULT => $opts{d} ? 1 : 0 });
$config->define("modem:baud", { DEFAULT => 9600 });
$config->define("modem:data", { DEFAULT => 7 });
$config->define("modem:parity", { DEFAULT => "even" });
$config->define("modem:stop", { DEFAULT => 1 });
$config->define("modem:flow", { DEFAULT => "rts" });
$config->define("modem:strict-parity", { ARGCOUNT => 0, DEFAULT => 0 });
$config->define("modem:dev", { DEFAULT => "/dev/null" });
$config->define("modem:carrier-detect", { DEFAULT => "on" });
# time to force DTR down during reset (0 = don't do it at all)
$config->define("modem:dtrtime", { DEFAULT => 0.5 });
$config->define("modem:init", { DEFAULT => "ATZ" });
$config->define("modem:initok", { DEFAULT => "OK" });
$config->define("modem:initwait",{ DEFAULT => 4 });
$config->define("modem:initretries",{ DEFAULT => 2 });
$config->define("modem:dial", { DEFAULT => "ATDT" });
$config->define("modem:dialok", { DEFAULT => "CONNECT.*\r" });
$config->define("modem:dialwait",{ DEFAULT => 60 });
$config->define("modem:error", { DEFAULT => "ERROR" });
$config->define("modem:no-carrier",
{ DEFAULT => "ERROR|NO CARRIER|BUSY|NO DIAL|VOICE" });
$config->define("modem:areacode", { UNSET => 1 });
$config->define("modem:longdist", { DEFAULT => 1 });
$config->define("modem:dialout", { DEFAULT => "" });
# FIXME:
# currently not implemented -- perhaps never, better to stall and try again
$config->define("modem:dialretries",{ DEFAULT => 3 });
# paging central defaults
# Paging centrals can override baud, data, parity, stop, flow, dialwait,
# dialretries
# modem connect info
$config->define("pc:enabled",{ ARGCOUNT => 0, DEFAULT => 1 });
$config->define("pc:debug", { ARGCOUNT => 0,
DEFAULT => $opts{d} ? 1 : 0 });
$config->define("pc:page-daemon", { UNSET => 1 });
$config->define("pc:cc-on-error", { ARGCOUNT => 0, UNSET => 1 });
$config->define("pc:fail-notify", { ARGCOUNT => 0, UNSET => 1 });
$config->define("pc:tempfail-notify-after", { UNSET => 1 });
$config->define("pc:max-tempfail", { UNSET => 1 });
# command to run after each successful or failed page
$config->define("pc:completion-cmd", { UNSET => 1 });
$config->define("pc:modems", { ARGCOUNT => 2 });
$config->define("pc:baud", { DEFAULT => 9600 });
$config->define("pc:data", { DEFAULT => 7 });
$config->define("pc:parity", { DEFAULT => "even" });
$config->define("pc:stop", { DEFAULT => 1 });
$config->define("pc:flow", { DEFAULT => "rts" });
$config->define("pc:strict-parity", { ARGCOUNT => 0, DEFAULT => 0 });
$config->define("pc:phonenum",{DEFAULT => "" });
$config->define("pc:areacode",{ UNSET => 1 });
# how many chars per page before auto-splitting?
$config->define("pc:maxchars",{DEFAULT => 1024 });
# how many page splits allowed per page?
$config->define("pc:maxsplits",{DEFAULT => 6 });
# PC uses it's own dialwait for delaying
$config->define("pc:dialwait",{ UNSET => 1 });
$config->define("pc:rundelay",{DEFAULT => 30 });
$config->define("pc:dialretries",{ DEFAULT => 3 });
# allow for redefining the proto version
$config->define("pc:proto",{DEFAULT => "PG1" });
# allow for forced multiple fields in BlockTrans
$config->define("pc:fields",{DEFAULT => 2 });
$config->define("pc:password",{DEFAULT => "000000" });
# proto establishment info
$config->define("pc:answerwait", { DEFAULT => 2 });
$config->define("pc:answerretries", { DEFAULT => 3 });
# protocol settings
# MUST have the leading "<CR>" for each answer?
$config->define("pc:stricttap", { DEFAULT => 0, ARGCOUNT => 0 });
# chars less than 0x20 are allowed in a field
$config->define("pc:ctrl", { DEFAULT => 0, ARGCOUNT => 0 });
# chars CAN be escaped (if false, "LF" is allowed, it seems?)
$config->define("pc:esc", { DEFAULT => 0, ARGCOUNT => 0 });
# is LF allowed (some PCs allow it, but no other ctrl chars)
$config->define("pc:lfok", { DEFAULT => 0, ARGCOUNT => 0 });
# fields cannot be split across blocks? (FIXME: unimplemented)
$config->define("pc:fieldsplits", { DEFAULT => 1, ARGCOUNT => 0 });
# paging central limits
# max blocks per connection (0 = unlimited)
$config->define("pc:maxblocks", { DEFAULT => 0 });
# max pages per connection (0 = unlimited)
$config->define("pc:maxpages", { DEFAULT => 0 });
# max chars per block: 250 is protocol standard: 256 - 3 ctrl - 3 chksum
$config->define("pc:chars-per-block", { DEFAULT => 250 });
return $config;
}
sub loadConfig {
my($cfgfile);
$cfgfile=$config->get("cfgfile");
$cfgfile=$opts{C} if (defined($opts{C}));
# toss our config
$config->dump();
# yes, this seems silly, but we allow cmdline options to change
# various defaults, including this one
$config->file($cfgfile);
if($config->get("dsn")) {
my ($dsn, $dbuser, $dbpass, $dbtable);
$dsn = $config->get("dsn");
$dbuser = $config->get("dbuser");
$dbpass = $config->get("dbpass");
$dbtable = $config->get("dbtable");
if($db) {
$db->setdb($dsn,$dbuser,$dbpass,$dbtable);
} else {
$db = Sendpage::Db->new($dsn,$dbuser,$dbpass,$dbtable);
}
}
}
#
# file locking example from the Perl Cookbook
#
# use Fcntl qw(:DEFAULT :flock);
#
# sysopen(FH, "numfile", O_RDWR|O_CREAT)
# or die "can't open numfile: $!";
# flock(FH, LOCK_EX) or die "can't write-lock numfile: $!";
# # Now we have acquired the lock, it's safe for I/O
# $num = <FH> || 0; # DO NOT USE "or" THERE!!
# seek(FH, 0, 0) or die "can't rewind numfile : $!";
# truncate(FH, 0) or die "can't truncate numfile: $!";
# print FH $num+1, "\n" or die "can't write numfile: $!";
# close(FH) or die "can't close numfile: $!";
#
#
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