package DXCommandmode;
+@ISA = qw(DXChannel);
+
use DXUtil;
use DXChannel;
use DXUser;
-use DXM;
use DXVars;
+use DXDebug;
+use DXM;
+use DXLog;
+use CmdAlias;
+use FileHandle;
+use Carp;
+
+use strict;
+use vars qw(%Cache %cmd_cache $errstr %aliases);
+
+%Cache = (); # cache of dynamically loaded routine's mod times
+%cmd_cache = (); # cache of short names
+$errstr = (); # error string from eval
+%aliases = (); # aliases for (parts of) commands
-$last_dir_mtime = 0; # the last time one of the cmd dirs was modified
-@cmd = undef; # a list of commands+path pairs (in alphabetical order)
+#
+# obtain a new connection this is derived from dxchannel
+#
+
+sub new
+{
+ my $self = DXChannel::alloc(@_);
+ $self->{sort} = 'U'; # in absence of how to find out what sort of an object I am
+ return $self;
+}
# this is how a a connection starts, you get a hello message and the motd with
# possibly some other messages asking you to set various things up if you are
# new (or nearly new and slacking) user.
-sub user_start
+sub start
{
- my $self = shift;
+ my ($self, $line) = @_;
my $user = $self->{user};
my $call = $self->{call};
- my $name = $self->{name};
- $name = $call if !defined $name;
- $self->{normal} = \&user_normal; # rfu for now
- $self->{finish} = \&user_finish;
- $self->msg('l2',$name);
+ my $name = $user->{name};
+
+ $self->{name} = $name ? $name : $call;
+ $self->send($self->msg('l2',$self->{name}));
$self->send_file($main::motd) if (-e $main::motd);
- $self->msg('pr', $call);
- $self->{state} = 10; # a bit of room for further expansion, passwords etc
- $self->{priv} = 0; # set the connection priv to 0 - can be upgraded later
+ $self->send($self->msg('pr', $call));
+ $self->state('prompt'); # a bit of room for further expansion, passwords etc
+ $self->{priv} = $user->priv;
+ $self->{lang} = $user->lang;
+ $self->{priv} = 0 if $line =~ /^(ax|te)/; # set the connection priv to 0 - can be upgraded later
+ $self->{consort} = $line; # save the connection type
+
+ # set some necessary flags on the user if they are connecting
+ $self->{wwv} = $self->{talk} = $self->{ann} = $self->{here} = $self->{dx} = 1;
+# $self->prompt() if $self->{state} =~ /^prompt/o;
+
+ # add yourself to the database
+ my $node = DXNode->get($main::mycall) or die "$main::mycall not allocated in DXNode database";
+ my $cuser = DXNodeuser->new($self, $node, $call, 0, 1);
+ $node->dxchan($self) if $call eq $main::myalias; # send all output for mycall to myalias
+
+ # issue a pc16 to everybody interested
+ my $nchan = DXChannel->get($main::mycall);
+ my @pc16 = DXProt::pc16($nchan, $cuser);
+ DXProt::broadcast_ak1a(@pc16);
+ Log('DXCommand', "$call connected");
}
#
# This is the normal command prompt driver
#
-sub user_normal
+sub normal
{
my $self = shift;
my $user = $self->{user};
my $call = $self->{call};
- my $cmd = shift;
+ my $cmdline = shift;
+ my @ans;
- # read in the list of valid commands, note that the commands themselves are cached elsewhere
- scan_cmd_dirs if (!defined %cmd);
-
- # strip out any nasty characters like $@%&|. and double // etc.
- $cmd =~ s/[\%\@\$\&\|\.\`\~]//og;
- $cmd =~ s|//|/|og;
+ # are we in stored state?
+ if ($self->{func}) {
+ my $c = qq{ \@ans = $self->{func}(\$self, \$cmdline) };
+ dbg('eval', "stored func cmd = $c\n");
+ eval $c;
+ if ($@) {
+ return (1, "Syserr: Eval err $errstr on stored func $self->{func}");
+ }
+ } else {
+
+ # special case only \n input => " "
+ if ($cmdline eq " ") {
+ $self->prompt();
+ return;
+ }
+
+ # strip out //
+ $cmdline =~ s|//|/|og;
- # split the command up into parts
- my @parts = split |[/\b]+|, $cmd;
+ # split the command line up into parts, the first part is the command
+ my ($cmd, $args) = $cmdline =~ /^([\w\/]+)\s*(.*)/o;
+
+ if ($cmd) {
+
+ my ($path, $fcmd);
+
+ # alias it if possible
+ my $acmd = CmdAlias::get_cmd($cmd);
+ if ($acmd) {
+ ($cmd, $args) = "$acmd $args" =~ /^([\w\/]+)\s*(.*)/o;
+ }
+
+ # first expand out the entry to a command
+ ($path, $fcmd) = search($main::localcmd, $cmd, "pl");
+ ($path, $fcmd) = search($main::cmd, $cmd, "pl") if !$path || !$fcmd;
+
+ my $package = find_cmd_name($path, $fcmd);
+ @ans = (0) if !$package ;
+
+ if ($package) {
+ my $c = qq{ \@ans = $package(\$self, \$args) };
+ dbg('eval', "cluster cmd = $c\n");
+ eval $c;
+ if ($@) {
+ @ans = (0, "Syserr: Eval err cached $package\n$@");
+ }
+ }
+ }
+ }
+
+ if ($ans[0]) {
+ shift @ans;
+ $self->send(@ans) if @ans > 0;
+ } else {
+ shift @ans;
+ if (@ans > 0) {
+ $self->send($self->msg('e2'), @ans);
+ } else {
+ $self->send($self->msg('e1'));
+ }
+ }
- # first expand out the entry to a command, note that I will accept
- # anything in any case with any (reasonable) seperator
- $self->prompt();
+ # send a prompt only if we are in a prompt state
+ $self->prompt() if $self->{state} =~ /^prompt/o;
}
#
# This is called from inside the main cluster processing loop and is used
# for despatching commands that are doing some long processing job
#
-sub user_process
+sub process
{
+ my $t = time;
+ my @chan = DXChannel->get_all();
+ my $chan;
+
+ foreach $chan (@chan) {
+ next if $chan->sort ne 'U';
+ # send a prompt if no activity out on this channel
+ if ($t >= $chan->t + $main::user_interval) {
+ $chan->prompt() if $chan->{state} =~ /^prompt/o;
+ $chan->t($t);
+ }
+ }
}
#
# finish up a user context
#
-sub user_finish
+sub finish
{
+ my $self = shift;
+ my $call = $self->call;
+ if ($call eq $main::myalias) { # unset the channel if it is us really
+ my $node = DXNode->get($main::mycall);
+ $node->{dxchan} = 0;
+ }
+ my $ref = DXNodeuser->get($call);
+
+ # issue a pc17 to everybody interested
+ my $nchan = DXChannel->get($main::mycall);
+ my $pc17 = $nchan->pc17($self);
+ DXProt::broadcast_ak1a($pc17);
+
+ Log('DXCommand', "$call disconnected");
+ $ref->del() if $ref;
}
#
{
my $self = shift;
my $call = $self->{call};
- $self->msg('pr', $call);
+ $self->send($self->msg('pr', $call));
+ #DXChannel::msg($self, 'pr', $call);
+}
+
+# broadcast a message to all users [except those mentioned after buffer]
+sub broadcast
+{
+ my $pkg = shift; # ignored
+ my $s = shift; # the line to be rebroadcast
+ my @except = @_; # to all channels EXCEPT these (dxchannel refs)
+ my @list = DXChannel->get_all(); # just in case we are called from some funny object
+ my ($chan, $except);
+
+L: foreach $chan (@list) {
+ next if !$chan->sort eq 'U'; # only interested in user channels
+ foreach $except (@except) {
+ next L if $except == $chan; # ignore channels in the 'except' list
+ }
+ chan->send($s); # send it
+ }
+}
+
+# gimme all the users
+sub get_all
+{
+ my @list = DXChannel->get_all();
+ my $ref;
+ my @out;
+ foreach $ref (@list) {
+ push @out, $ref if $ref->sort eq 'U';
+ }
+ return @out;
}
#
-# scan the command directories to see if things have changed
-#
-# If they have remake the command list
-#
-# There are two command directories a) the standard one and b) the local one
-# The local one overides the standard one
+# search for the command in the cache of short->long form commands
#
-sub scan_cmd_dirs
+sub search
{
- my $self = shift;
+ my ($path, $short_cmd, $suffix) = @_;
+ my ($apath, $acmd);
+ # commands are lower case
+ $short_cmd = lc $short_cmd;
+ dbg('command', "command: $path $short_cmd\n");
+
+ # return immediately if we have it
+ my ($apath, $acmd) = split ',', $cmd_cache{$short_cmd};
+ if ($apath && $acmd) {
+ dbg('command', "cached $short_cmd = ($apath, $acmd)\n");
+ return ($apath, $acmd);
+ }
+
+ # if not guess
+ my @parts = split '/', $short_cmd;
+ my $dirfn;
+ my $curdir = $path;
+ my $p;
+ my $i;
+ my @lparts;
+
+ for ($i = 0; $i < @parts; $i++) {
+ my $p = $parts[$i];
+ opendir(D, $curdir) or confess "can't open $curdir $!";
+ my @ls = readdir D;
+ closedir D;
+ my $l;
+ foreach $l (sort @ls) {
+ next if $l =~ /^\./;
+ if ($i < $#parts) { # we are dealing with directories
+ if ((-d "$curdir/$l") && $p eq substr($l, 0, length $p)) {
+ dbg('command', "got dir: $curdir/$l\n");
+ $dirfn .= "$l/";
+ $curdir .= "/$l";
+ last;
+ }
+ } else { # we are dealing with commands
+ @lparts = split /\./, $l;
+ next if $lparts[$#lparts] ne $suffix; # only look for .$suffix files
+ if ($p eq substr($l, 0, length $p)) {
+ pop @lparts; # remove the suffix
+ $l = join '.', @lparts;
+# chop $dirfn; # remove trailing /
+ $cmd_cache{"$short_cmd"} = join(',', ($path, "$dirfn$l")); # cache it
+ dbg('command', "got path: $path cmd: $dirfn$l\n");
+ return ($path, "$dirfn$l");
+ }
+ }
+ }
+ }
+ return ();
+}
+# clear the command name cache
+sub clear_cmd_cache
+{
+ %cmd_cache = ();
}
#
#
#require Devel::Symdump;
-use strict;
-use vars '%Cache';
sub valid_package_name {
my($string) = @_;
$string =~ s|/(\d)|sprintf("/_%2x",unpack("C",$1))|eg;
#Dress it up as a real package name
- $string =~ s|/|::|g;
- return "DXEmbed" . $string;
+ $string =~ s/\//_/og;
+ return "Emb_" . $string;
}
#borrowed from Safe.pm
my ($stem, $leaf);
no strict 'refs';
- $pkg = "main::$pkg\::"; # expand to full symbol table name
+ $pkg = "DXCommandmode::$pkg\::"; # expand to full symbol table name
($stem, $leaf) = $pkg =~ m/(.*::)(\w+::)$/;
-
- my $stem_symtab = *{$stem}{HASH};
-
- delete $stem_symtab->{$leaf};
+
+ if ($stem && $leaf) {
+ my $stem_symtab = *{$stem}{HASH};
+ delete $stem_symtab->{$leaf};
+ }
}
-sub eval_file {
- my($self, $path, $cmdname) = @_;
+# find a cmd reference
+# this is really for use in user written stubs
+#
+# use the result as a symbolic reference:-
+#
+# no strict 'refs';
+# @out = &$r($self, $line);
+#
+sub find_cmd_ref
+{
+ my $cmd = shift;
+ my $r;
+
+ if ($cmd) {
+
+ # first expand out the entry to a command
+ my ($path, $fcmd) = search($main::localcmd, $cmd, "pl");
+ ($path, $fcmd) = search($main::cmd, $cmd, "pl") if !$path || !$fcmd;
+
+ # make sure it is loaded
+ $r = find_cmd_name($path, $fcmd);
+ }
+ return $r;
+}
+
+#
+# this bit of magic finds a command in the offered directory
+sub find_cmd_name {
+ my $path = shift;
+ my $cmdname = shift;
my $package = valid_package_name($cmdname);
- my $filename = "$path/$cmdname";
- my $mtime = -m $filename;
- my @r;
+ my $filename = "$path/$cmdname.pl";
+ my $mtime = -M $filename;
+
+ # return if we can't find it
+ $errstr = undef;
+ if (undef $mtime) {
+ $errstr = DXM::msg('e1');
+ return undef;
+ }
if(defined $Cache{$package}{mtime} && $Cache{$package}{mtime } <= $mtime) {
#we have compiled this subroutine already,
#print STDERR "already compiled $package->handler\n";
;
} else {
- local *FH;
- open FH, $filename or die "open '$filename' $!";
- local($/) = undef;
- my $sub = <FH>;
- close FH;
+ my $fh = new FileHandle;
+ if (!open $fh, $filename) {
+ $errstr = "Syserr: can't open '$filename' $!";
+ return undef;
+ };
+ local $/ = undef;
+ my $sub = <$fh>;
+ close $fh;
#wrap the code into a subroutine inside our unique package
- my $eval = qq{package $package; sub handler { $sub; }};
+ my $eval = qq{
+ sub $package
+ {
+ $sub
+ } };
+
+ if (isdbg('eval')) {
+ my @list = split /\n/, $eval;
+ my $line;
+ for (@list) {
+ dbg('eval', $_, "\n");
+ }
+ }
+
{
#hide our variables within this block
my($filename,$mtime,$package,$sub);
eval $eval;
}
+
if ($@) {
- $self->send("Eval err $@ on $package");
+ print "\$\@ = $@";
+ $errstr = $@;
delete_package($package);
- return undef;
+ } else {
+ #cache it unless we're cleaning out each time
+ $Cache{$package}{mtime} = $mtime;
}
-
- #cache it unless we're cleaning out each time
- $Cache{$package}{mtime} = $mtime unless $delete;
}
-
- @r = eval {$package->handler;};
- if ($@) {
- $self->send("Eval err $@ on cached $package");
- delete_package($package);
- return undef;
- }
-
- #take a look if you want
+
#print Devel::Symdump->rnew($package)->as_string, $/;
- return @r;
+ $package = "DXCommandmode::$package" if $package;
+ $package = undef if $errstr;
+ return $package;
}
1;
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