mirror of
git://scm.dxcluster.org/scm/spider
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324bd80ed4
2034 whhich caused a bit of confusion!) 2. Make WWV spots broadcast them to the users! (as opposed to merely storing them)(thank you G0RDI). 3. Allow users to do show/announce (thank you JE1SGH). 4. Delay broadcasts to users if they are not in a 'prompt' state (means you can add messages and see what you are doing on a busy system) 5. Made set/unset dx,ann,wx,talk,wwv do what is expected 6. added set/sys_location and set/set_qra to set the cluster lat/long and qra 7. New messages will now be announced on logon (if there are any)
534 lines
12 KiB
Perl
534 lines
12 KiB
Perl
#!/usr/bin/perl
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#
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# This module impliments the user facing command mode for a dx cluster
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#
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# Copyright (c) 1998 Dirk Koopman G1TLH
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#
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# $Id$
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#
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package DXCommandmode;
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@ISA = qw(DXChannel);
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use DXUtil;
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use DXChannel;
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use DXUser;
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use DXVars;
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use DXDebug;
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use DXM;
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use DXLog;
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use DXLogPrint;
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use DXBearing;
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use CmdAlias;
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use FileHandle;
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use Carp;
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use strict;
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use vars qw(%Cache %cmd_cache $errstr %aliases);
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%Cache = (); # cache of dynamically loaded routine's mod times
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%cmd_cache = (); # cache of short names
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$errstr = (); # error string from eval
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%aliases = (); # aliases for (parts of) commands
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#
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# obtain a new connection this is derived from dxchannel
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#
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sub new
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{
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my $self = DXChannel::alloc(@_);
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$self->{'sort'} = 'U'; # in absence of how to find out what sort of an object I am
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return $self;
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}
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# this is how a a connection starts, you get a hello message and the motd with
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# possibly some other messages asking you to set various things up if you are
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# new (or nearly new and slacking) user.
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sub start
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{
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my ($self, $line, $sort) = @_;
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my $user = $self->{user};
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my $call = $self->{call};
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my $name = $user->{name};
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$self->{name} = $name ? $name : $call;
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$self->send($self->msg('l2',$self->{name}));
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$self->send_file($main::motd) if (-e $main::motd);
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$self->state('prompt'); # a bit of room for further expansion, passwords etc
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$self->{priv} = $user->priv;
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$self->{lang} = $user->lang;
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$self->{pagelth} = 20;
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$self->{priv} = 0 if $line =~ /^(ax|te)/; # set the connection priv to 0 - can be upgraded later
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$self->{consort} = $line; # save the connection type
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# set some necessary flags on the user if they are connecting
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$self->{beep} = $self->{wwv} = $self->{wx} = $self->{talk} = $self->{ann} = $self->{here} = $self->{dx} = 1;
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# $self->prompt() if $self->{state} =~ /^prompt/o;
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# add yourself to the database
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my $node = DXNode->get($main::mycall) or die "$main::mycall not allocated in DXNode database";
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my $cuser = DXNodeuser->new($self, $node, $call, 0, 1);
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$node->dxchan($self) if $call eq $main::myalias; # send all output for mycall to myalias
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# issue a pc16 to everybody interested
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my $nchan = DXChannel->get($main::mycall);
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my @pc16 = DXProt::pc16($nchan, $cuser);
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DXProt::broadcast_ak1a(@pc16);
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Log('DXCommand', "$call connected");
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# send prompts and things
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my $info = DXCluster::cluster();
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$self->send("Cluster:$info");
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$self->send($self->msg('namee1')) if !$user->name;
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$self->send($self->msg('qthe1')) if !$user->qth;
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$self->send($self->msg('qll')) if !$user->qra || (!$user->lat && !$user->long);
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$self->send($self->msg('hnodee1')) if !$user->qth;
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$self->send($self->msg('msgnew')) if DXMsg::for_me($call);
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$self->send($self->msg('pr', $call));
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}
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#
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# This is the normal command prompt driver
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#
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sub normal
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{
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my $self = shift;
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my $cmdline = shift;
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my @ans;
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# remove leading and trailing spaces
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$cmdline =~ s/^\s*(.*)\s*$/$1/;
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if ($self->{state} eq 'page') {
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my $i = $self->{pagelth};
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my $ref = $self->{pagedata};
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my $tot = @$ref;
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# abort if we get a line starting in with a
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if ($cmdline =~ /^a/io) {
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undef $ref;
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$i = 0;
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}
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# send a tranche of data
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while ($i-- > 0 && @$ref) {
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my $line = shift @$ref;
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$line =~ s/\s+$//o; # why am having to do this?
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$self->send($line);
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}
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# reset state if none or else chuck out an intermediate prompt
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if ($ref && @$ref) {
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$tot -= $self->{pagelth};
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$self->send($self->msg('page', $tot));
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} else {
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$self->state('prompt');
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}
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} else {
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@ans = run_cmd($self, $cmdline); # if length $cmdline;
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if ($self->{pagelth} && @ans > $self->{pagelth}) {
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my $i;
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for ($i = $self->{pagelth}; $i-- > 0; ) {
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my $line = shift @ans;
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$line =~ s/\s+$//o; # why am having to do this?
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$self->send($line);
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}
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$self->{pagedata} = \@ans;
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$self->state('page');
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$self->send($self->msg('page', scalar @ans));
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} else {
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for (@ans) {
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s/\s+$//o; # why ?????????
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$self->send($_);
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}
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}
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}
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# send a prompt only if we are in a prompt state
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$self->prompt() if $self->{state} =~ /^prompt/o;
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}
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#
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# this is the thing that runs the command, it is done like this for the
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# benefit of remote command execution
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#
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sub run_cmd
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{
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my $self = shift;
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my $user = $self->{user};
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my $call = $self->{call};
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my $cmdline = shift;
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my @ans;
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if ($self->{func}) {
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my $c = qq{ \@ans = $self->{func}(\$self, \$cmdline) };
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dbg('eval', "stored func cmd = $c\n");
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eval $c;
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if ($@) {
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return (1, "Syserr: Eval err $errstr on stored func $self->{func}");
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}
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} else {
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return () if length $cmdline == 0;
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# strip out //
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$cmdline =~ s|//|/|og;
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# split the command line up into parts, the first part is the command
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my ($cmd, $args) = $cmdline =~ /^([\S\/]+)\s*(.*)/o;
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if ($cmd) {
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my ($path, $fcmd);
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dbg('command', "cmd: $cmd");
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# alias it if possible
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my $acmd = CmdAlias::get_cmd($cmd);
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if ($acmd) {
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($cmd, $args) = "$acmd $args" =~ /^([\w\/]+)\s*(.*)/o;
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dbg('command', "aliased cmd: $cmd $args");
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}
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# first expand out the entry to a command
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($path, $fcmd) = search($main::localcmd, $cmd, "pl");
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($path, $fcmd) = search($main::cmd, $cmd, "pl") if !$path || !$fcmd;
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if ($path && $cmd) {
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dbg('command', "path: $cmd cmd: $fcmd");
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my $package = find_cmd_name($path, $fcmd);
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@ans = (0) if !$package ;
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if ($package) {
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dbg('command', "package: $package");
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my $c = qq{ \@ans = $package(\$self, \$args) };
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dbg('eval', "cluster cmd = $c\n");
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eval $c;
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if ($@) {
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@ans = (0, "Syserr: Eval err cached $package\n$@");
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}
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}
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} else {
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dbg('command', "cmd: $cmd not found");
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@ans = (0);
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}
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}
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}
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if ($ans[0]) {
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shift @ans;
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} else {
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shift @ans;
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if (@ans > 0) {
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unshift @ans, $self->msg('e2');
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} else {
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@ans = $self->msg('e1');
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}
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}
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return (@ans);
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}
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#
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# This is called from inside the main cluster processing loop and is used
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# for despatching commands that are doing some long processing job
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#
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sub process
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{
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my $t = time;
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my @dxchan = DXChannel->get_all();
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my $dxchan;
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foreach $dxchan (@dxchan) {
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next if $dxchan->sort ne 'U';
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# send a prompt if no activity out on this channel
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if ($t >= $dxchan->t + $main::user_interval) {
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$dxchan->prompt() if $dxchan->{state} =~ /^prompt/o;
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$dxchan->t($t);
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}
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}
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}
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#
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# finish up a user context
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#
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sub finish
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{
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my $self = shift;
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my $call = $self->call;
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# log out text
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if (-e "$main::data/logout") {
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open(I, "$main::data/logout") or confess;
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my @in = <I>;
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close(I);
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$self->send_now('D', @in);
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sleep(1);
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}
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if ($call eq $main::myalias) { # unset the channel if it is us really
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my $node = DXNode->get($main::mycall);
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$node->{dxchan} = 0;
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}
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my $ref = DXCluster->get_exact($call);
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# issue a pc17 to everybody interested
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my $nchan = DXChannel->get($main::mycall);
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my $pc17 = $nchan->pc17($self);
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DXProt::broadcast_ak1a($pc17);
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Log('DXCommand', "$call disconnected");
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$ref->del() if $ref;
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}
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#
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# short cut to output a prompt
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#
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sub prompt
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{
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my $self = shift;
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$self->send($self->msg($self->here ? 'pr' : 'pr2', $self->call));
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}
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# broadcast a message to all users [except those mentioned after buffer]
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sub broadcast
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{
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my $pkg = shift; # ignored
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my $s = shift; # the line to be rebroadcast
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my @except = @_; # to all channels EXCEPT these (dxchannel refs)
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my @list = DXChannel->get_all(); # just in case we are called from some funny object
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my ($dxchan, $except);
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L: foreach $dxchan (@list) {
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next if !$dxchan->sort eq 'U'; # only interested in user channels
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foreach $except (@except) {
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next L if $except == $dxchan; # ignore channels in the 'except' list
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}
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$dxchan->send($s); # send it
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}
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}
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# gimme all the users
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sub get_all
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{
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my @list = DXChannel->get_all();
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my $ref;
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my @out;
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foreach $ref (@list) {
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push @out, $ref if $ref->sort eq 'U';
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}
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return @out;
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}
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#
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# search for the command in the cache of short->long form commands
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#
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sub search
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{
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my ($path, $short_cmd, $suffix) = @_;
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my ($apath, $acmd);
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# commands are lower case
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$short_cmd = lc $short_cmd;
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dbg('command', "command: $path $short_cmd\n");
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# do some checking for funny characters
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return () if $short_cmd =~ /\/$/;
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# return immediately if we have it
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($apath, $acmd) = split ',', $cmd_cache{$short_cmd} if $cmd_cache{$short_cmd};
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if ($apath && $acmd) {
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dbg('command', "cached $short_cmd = ($apath, $acmd)\n");
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return ($apath, $acmd);
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}
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# if not guess
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my @parts = split '/', $short_cmd;
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my $dirfn;
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my $curdir = $path;
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my $p;
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my $i;
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my @lparts;
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for ($i = 0; $i < @parts; $i++) {
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my $p = $parts[$i];
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opendir(D, $curdir) or confess "can't open $curdir $!";
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my @ls = readdir D;
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closedir D;
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my $l;
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foreach $l (sort @ls) {
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next if $l =~ /^\./;
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if ($i < $#parts) { # we are dealing with directories
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if ((-d "$curdir/$l") && $p eq substr($l, 0, length $p)) {
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dbg('command', "got dir: $curdir/$l\n");
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$dirfn .= "$l/";
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$curdir .= "/$l";
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last;
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}
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} else { # we are dealing with commands
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@lparts = split /\./, $l;
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next if $lparts[$#lparts] ne $suffix; # only look for .$suffix files
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if ($p eq substr($l, 0, length $p)) {
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pop @lparts; # remove the suffix
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$l = join '.', @lparts;
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# chop $dirfn; # remove trailing /
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$dirfn = "" unless $dirfn;
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$cmd_cache{"$short_cmd"} = join(',', ($path, "$dirfn$l")); # cache it
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dbg('command', "got path: $path cmd: $dirfn$l\n");
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return ($path, "$dirfn$l");
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}
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}
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}
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}
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return ();
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}
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# clear the command name cache
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sub clear_cmd_cache
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{
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%cmd_cache = ();
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}
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#
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# the persistant execution of things from the command directories
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#
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#
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# This allows perl programs to call functions dynamically
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#
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# This has been nicked directly from the perlembed pages
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#
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#require Devel::Symdump;
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sub valid_package_name {
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my($string) = @_;
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$string =~ s/([^A-Za-z0-9\/])/sprintf("_%2x",unpack("C",$1))/eg;
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#second pass only for words starting with a digit
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$string =~ s|/(\d)|sprintf("/_%2x",unpack("C",$1))|eg;
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#Dress it up as a real package name
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$string =~ s/\//_/og;
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return "Emb_" . $string;
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}
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#borrowed from Safe.pm
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sub delete_package {
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my $pkg = shift;
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my ($stem, $leaf);
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no strict 'refs';
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$pkg = "DXCommandmode::$pkg\::"; # expand to full symbol table name
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($stem, $leaf) = $pkg =~ m/(.*::)(\w+::)$/;
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if ($stem && $leaf) {
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my $stem_symtab = *{$stem}{HASH};
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delete $stem_symtab->{$leaf};
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}
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}
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# find a cmd reference
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# this is really for use in user written stubs
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#
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# use the result as a symbolic reference:-
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#
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# no strict 'refs';
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# @out = &$r($self, $line);
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#
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sub find_cmd_ref
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{
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my $cmd = shift;
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my $r;
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if ($cmd) {
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# first expand out the entry to a command
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my ($path, $fcmd) = search($main::localcmd, $cmd, "pl");
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($path, $fcmd) = search($main::cmd, $cmd, "pl") if !$path || !$fcmd;
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# make sure it is loaded
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$r = find_cmd_name($path, $fcmd);
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}
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return $r;
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}
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#
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# this bit of magic finds a command in the offered directory
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sub find_cmd_name {
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my $path = shift;
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my $cmdname = shift;
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my $package = valid_package_name($cmdname);
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my $filename = "$path/$cmdname.pl";
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my $mtime = -M $filename;
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# return if we can't find it
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$errstr = undef;
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unless (defined $mtime) {
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$errstr = DXM::msg('e1');
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return undef;
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}
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if(defined $Cache{$package}{mtime} && $Cache{$package}{mtime } <= $mtime) {
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#we have compiled this subroutine already,
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#it has not been updated on disk, nothing left to do
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#print STDERR "already compiled $package->handler\n";
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;
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} else {
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delete_package($package) if defined $Cache{$package}{mtime};
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my $fh = new FileHandle;
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if (!open $fh, $filename) {
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$errstr = "Syserr: can't open '$filename' $!";
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return undef;
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};
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local $/ = undef;
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my $sub = <$fh>;
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close $fh;
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#wrap the code into a subroutine inside our unique package
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my $eval = qq{ sub $package { $sub } };
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if (isdbg('eval')) {
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my @list = split /\n/, $eval;
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my $line;
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for (@list) {
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dbg('eval', $_, "\n");
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}
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}
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{
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#hide our variables within this block
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my($filename,$mtime,$package,$sub);
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eval $eval;
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}
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if ($@) {
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print "\$\@ = $@";
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$errstr = $@;
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delete_package($package);
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} else {
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#cache it unless we're cleaning out each time
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$Cache{$package}{'mtime'} = $mtime;
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}
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}
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#print Devel::Symdump->rnew($package)->as_string, $/;
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$package = "DXCommandmode::$package" if $package;
|
|
$package = undef if $errstr;
|
|
return $package;
|
|
}
|
|
|
|
1;
|
|
__END__
|