3 # This module impliments the user facing command mode for a dx cluster
5 # Copyright (c) 1998 Dirk Koopman G1TLH
10 package DXCommandmode;
29 use vars qw(%Cache %cmd_cache $errstr %aliases);
31 %Cache = (); # cache of dynamically loaded routine's mod times
32 %cmd_cache = (); # cache of short names
33 $errstr = (); # error string from eval
34 %aliases = (); # aliases for (parts of) commands
37 # obtain a new connection this is derived from dxchannel
42 my $self = DXChannel::alloc(@_);
43 $self->{'sort'} = 'U'; # in absence of how to find out what sort of an object I am
47 # this is how a a connection starts, you get a hello message and the motd with
48 # possibly some other messages asking you to set various things up if you are
49 # new (or nearly new and slacking) user.
53 my ($self, $line, $sort) = @_;
54 my $user = $self->{user};
55 my $call = $self->{call};
56 my $name = $user->{name};
58 $self->{name} = $name ? $name : $call;
59 $self->send($self->msg('l2',$self->{name}));
60 $self->send_file($main::motd) if (-e $main::motd);
61 $self->state('prompt'); # a bit of room for further expansion, passwords etc
62 $self->{priv} = $user->priv;
63 $self->{lang} = $user->lang;
64 $self->{pagelth} = 20;
65 $self->{priv} = 0 if $line =~ /^(ax|te)/; # set the connection priv to 0 - can be upgraded later
66 $self->{consort} = $line; # save the connection type
68 # set some necessary flags on the user if they are connecting
69 $self->{beep} = $self->{wwv} = $self->{wx} = $self->{talk} = $self->{ann} = $self->{here} = $self->{dx} = 1;
70 # $self->prompt() if $self->{state} =~ /^prompt/o;
72 # add yourself to the database
73 my $node = DXNode->get($main::mycall) or die "$main::mycall not allocated in DXNode database";
74 my $cuser = DXNodeuser->new($self, $node, $call, 0, 1);
75 $node->dxchan($self) if $call eq $main::myalias; # send all output for mycall to myalias
77 # issue a pc16 to everybody interested
78 my $nchan = DXChannel->get($main::mycall);
79 my @pc16 = DXProt::pc16($nchan, $cuser);
81 DXProt::broadcast_all_ak1a($_);
83 Log('DXCommand', "$call connected");
85 # send prompts and things
86 my $info = DXCluster::cluster();
87 $self->send("Cluster:$info");
88 $self->send($self->msg('namee1')) if !$user->name;
89 $self->send($self->msg('qthe1')) if !$user->qth;
90 $self->send($self->msg('qll')) if !$user->qra || (!$user->lat && !$user->long);
91 $self->send($self->msg('hnodee1')) if !$user->qth;
92 $self->send($self->msg('msgnew')) if DXMsg::for_me($call);
95 $self->{spotfilter} = Filter::read_in('spots', $call);
97 $self->send($self->msg('pr', $call));
101 # This is the normal command prompt driver
110 # remove leading and trailing spaces
111 $cmdline =~ s/^\s*(.*)\s*$/$1/;
113 if ($self->{state} eq 'page') {
114 my $i = $self->{pagelth};
115 my $ref = $self->{pagedata};
118 # abort if we get a line starting in with a
119 if ($cmdline =~ /^a/io) {
124 # send a tranche of data
125 while ($i-- > 0 && @$ref) {
126 my $line = shift @$ref;
127 $line =~ s/\s+$//o; # why am having to do this?
131 # reset state if none or else chuck out an intermediate prompt
133 $tot -= $self->{pagelth};
134 $self->send($self->msg('page', $tot));
136 $self->state('prompt');
138 } elsif ($self->{state} eq 'sysop') {
139 my $passwd = $self->{user}->passwd;
140 my @pw = split / */, $passwd;
142 my @l = @{$self->{passwd}};
143 my $str = "$pw[$l[0]].*$pw[$l[1]].*$pw[$l[2]].*$pw[$l[3]].*$pw[$l[4]]";
144 if ($cmdline =~ /$str/) {
145 $self->{priv} = $self->{user}->priv;
147 $self->send($self->msg('sorry'));
150 $self->send($self->msg('sorry'));
152 delete $self->{passwd};
153 $self->state('prompt');
155 @ans = run_cmd($self, $cmdline); # if length $cmdline;
157 if ($self->{pagelth} && @ans > $self->{pagelth}) {
159 for ($i = $self->{pagelth}; $i-- > 0; ) {
160 my $line = shift @ans;
161 $line =~ s/\s+$//o; # why am having to do this?
164 $self->{pagedata} = \@ans;
165 $self->state('page');
166 $self->send($self->msg('page', scalar @ans));
169 s/\s+$//o; # why ?????????
175 # send a prompt only if we are in a prompt state
176 $self->prompt() if $self->{state} =~ /^prompt/o;
180 # this is the thing that runs the command, it is done like this for the
181 # benefit of remote command execution
187 my $user = $self->{user};
188 my $call = $self->{call};
193 my $c = qq{ \@ans = $self->{func}(\$self, \$cmdline) };
194 dbg('eval', "stored func cmd = $c\n");
197 return (1, "Syserr: Eval err $errstr on stored func $self->{func}");
201 return () if length $cmdline == 0;
204 $cmdline =~ s|//|/|og;
206 # split the command line up into parts, the first part is the command
207 my ($cmd, $args) = $cmdline =~ /^([\S\/]+)\s*(.*)/o;
213 dbg('command', "cmd: $cmd");
215 # alias it if possible
216 my $acmd = CmdAlias::get_cmd($cmd);
218 ($cmd, $args) = "$acmd $args" =~ /^([\w\/]+)\s*(.*)/o;
219 dbg('command', "aliased cmd: $cmd $args");
222 # first expand out the entry to a command
223 ($path, $fcmd) = search($main::localcmd, $cmd, "pl");
224 ($path, $fcmd) = search($main::cmd, $cmd, "pl") if !$path || !$fcmd;
227 dbg('command', "path: $cmd cmd: $fcmd");
229 my $package = find_cmd_name($path, $fcmd);
230 @ans = (0) if !$package ;
233 dbg('command', "package: $package");
235 my $c = qq{ \@ans = $package(\$self, \$args) };
236 dbg('eval', "cluster cmd = $c\n");
239 @ans = (0, "Syserr: Eval err cached $package\n$@");
243 dbg('command', "cmd: $cmd not found");
254 unshift @ans, $self->msg('e2');
256 @ans = $self->msg('e1');
263 # This is called from inside the main cluster processing loop and is used
264 # for despatching commands that are doing some long processing job
269 my @dxchan = DXChannel->get_all();
272 foreach $dxchan (@dxchan) {
273 next if $dxchan->sort ne 'U';
275 # send a prompt if no activity out on this channel
276 if ($t >= $dxchan->t + $main::user_interval) {
277 $dxchan->prompt() if $dxchan->{state} =~ /^prompt/o;
284 # finish up a user context
289 my $call = $self->call;
292 if (-e "$main::data/logout") {
293 open(I, "$main::data/logout") or confess;
296 $self->send_now('D', @in);
300 if ($call eq $main::myalias) { # unset the channel if it is us really
301 my $node = DXNode->get($main::mycall);
304 my $ref = DXCluster->get_exact($call);
306 # issue a pc17 to everybody interested
307 my $nchan = DXChannel->get($main::mycall);
308 my $pc17 = $nchan->pc17($self);
309 DXProt::broadcast_all_ak1a($pc17);
311 Log('DXCommand', "$call disconnected");
316 # short cut to output a prompt
322 $self->send($self->msg($self->here ? 'pr' : 'pr2', $self->call));
325 # broadcast a message to all users [except those mentioned after buffer]
328 my $pkg = shift; # ignored
329 my $s = shift; # the line to be rebroadcast
330 my @except = @_; # to all channels EXCEPT these (dxchannel refs)
331 my @list = DXChannel->get_all(); # just in case we are called from some funny object
332 my ($dxchan, $except);
334 L: foreach $dxchan (@list) {
335 next if !$dxchan->sort eq 'U'; # only interested in user channels
336 foreach $except (@except) {
337 next L if $except == $dxchan; # ignore channels in the 'except' list
339 $dxchan->send($s); # send it
343 # gimme all the users
346 my @list = DXChannel->get_all();
349 foreach $ref (@list) {
350 push @out, $ref if $ref->sort eq 'U';
356 # search for the command in the cache of short->long form commands
361 my ($path, $short_cmd, $suffix) = @_;
364 # commands are lower case
365 $short_cmd = lc $short_cmd;
366 dbg('command', "command: $path $short_cmd\n");
368 # do some checking for funny characters
369 return () if $short_cmd =~ /\/$/;
371 # return immediately if we have it
372 ($apath, $acmd) = split ',', $cmd_cache{$short_cmd} if $cmd_cache{$short_cmd};
373 if ($apath && $acmd) {
374 dbg('command', "cached $short_cmd = ($apath, $acmd)\n");
375 return ($apath, $acmd);
379 my @parts = split '/', $short_cmd;
386 for ($i = 0; $i < @parts; $i++) {
388 opendir(D, $curdir) or confess "can't open $curdir $!";
392 foreach $l (sort @ls) {
394 if ($i < $#parts) { # we are dealing with directories
395 if ((-d "$curdir/$l") && $p eq substr($l, 0, length $p)) {
396 dbg('command', "got dir: $curdir/$l\n");
401 } else { # we are dealing with commands
402 @lparts = split /\./, $l;
403 next if $lparts[$#lparts] ne $suffix; # only look for .$suffix files
404 if ($p eq substr($l, 0, length $p)) {
405 pop @lparts; # remove the suffix
406 $l = join '.', @lparts;
407 # chop $dirfn; # remove trailing /
408 $dirfn = "" unless $dirfn;
409 $cmd_cache{"$short_cmd"} = join(',', ($path, "$dirfn$l")); # cache it
410 dbg('command', "got path: $path cmd: $dirfn$l\n");
411 return ($path, "$dirfn$l");
419 # clear the command name cache
426 # the persistant execution of things from the command directories
429 # This allows perl programs to call functions dynamically
431 # This has been nicked directly from the perlembed pages
434 #require Devel::Symdump;
436 sub valid_package_name {
438 $string =~ s/([^A-Za-z0-9\/])/sprintf("_%2x",unpack("C",$1))/eg;
440 #second pass only for words starting with a digit
441 $string =~ s|/(\d)|sprintf("/_%2x",unpack("C",$1))|eg;
443 #Dress it up as a real package name
444 $string =~ s/\//_/og;
445 return "Emb_" . $string;
448 #borrowed from Safe.pm
454 $pkg = "DXCommandmode::$pkg\::"; # expand to full symbol table name
455 ($stem, $leaf) = $pkg =~ m/(.*::)(\w+::)$/;
457 if ($stem && $leaf) {
458 my $stem_symtab = *{$stem}{HASH};
459 delete $stem_symtab->{$leaf};
463 # find a cmd reference
464 # this is really for use in user written stubs
466 # use the result as a symbolic reference:-
469 # @out = &$r($self, $line);
478 # first expand out the entry to a command
479 my ($path, $fcmd) = search($main::localcmd, $cmd, "pl");
480 ($path, $fcmd) = search($main::cmd, $cmd, "pl") if !$path || !$fcmd;
482 # make sure it is loaded
483 $r = find_cmd_name($path, $fcmd);
489 # this bit of magic finds a command in the offered directory
493 my $package = valid_package_name($cmdname);
494 my $filename = "$path/$cmdname.pl";
495 my $mtime = -M $filename;
497 # return if we can't find it
499 unless (defined $mtime) {
500 $errstr = DXM::msg('e1');
504 if(defined $Cache{$package}{mtime} && $Cache{$package}{mtime } <= $mtime) {
505 #we have compiled this subroutine already,
506 #it has not been updated on disk, nothing left to do
507 #print STDERR "already compiled $package->handler\n";
510 delete_package($package) if defined $Cache{$package}{mtime};
512 my $fh = new FileHandle;
513 if (!open $fh, $filename) {
514 $errstr = "Syserr: can't open '$filename' $!";
521 #wrap the code into a subroutine inside our unique package
522 my $eval = qq{ sub $package { $sub } };
525 my @list = split /\n/, $eval;
528 dbg('eval', $_, "\n");
533 #hide our variables within this block
534 my($filename,$mtime,$package,$sub);
541 delete_package($package);
543 #cache it unless we're cleaning out each time
544 $Cache{$package}{'mtime'} = $mtime;
548 #print Devel::Symdump->rnew($package)->as_string, $/;
549 $package = "DXCommandmode::$package" if $package;
550 $package = undef if $errstr;