[ViewVC] Annotation of: cvs/AnyEvent-MP/bin/aemp

#!/opt/bin/perl

=head1 NAME

   aemp - AnyEvent:MP utility

=head1 SYNOPSIS

   aemp command args...

   # protocol commands
   aemp snd <port> <arg...>      # send a message
   aemp mon <port>               # wait till port is killed
   aemp rpc <port> <arg...>      # send message, append reply
   aemp eval <node> <expr...>    # evaluate expression

   # run a node
   aemp run initialise_args...   # run a node

   # node configuration: protocol endpoints
   aemp setnodeid <nodeid>       # configure the real node id
   aemp delnodeid                # reset node id to default (= inherit)

   # node configuration: secret
   aemp gensecret                # generate a random shared secret
   aemp setsecret <secret>       # set the shared secret
   aemp delsecret                # remove the secret (= inherit)

   # node configuration: TLS
   aemp gencert                  # generate a random certificate
   aemp setcert <file>           # set a certificate (key.pem + certificate.pem)
   aemp delcert                  # remove certificate (= inherit)

   # node configuration: seed addresses for bootstrapping
   aemp setseeds <host:port>,... # set seeds
   aemp delseeds                 # clear all seeds (= inherit)
   aemp addseed <host:port>      # add a seed
   aemp delseed <host:port>      # remove seed

   # node configuration: bind addresses
   aemp setbinds <host:port>,... # set binds
   aemp delbinds                 # clear all binds (= inherit)
   aemp addbind <host:port>      # add a bind address
   aemp delbind <host:port>      # remove a bind address

   # node configuration: services
   aemp setservices initfunc,... # set service functions
   aemp delservices              # clear all services (= inherit)
   aemp addservice <initfunc>    # add an instance of a service
   aemp delservice <initfunc>    # delete one instance of a service

   # profile-specific configuration
   aemp profile <name> <command>... # apply command to profile only
   aemp delprofile <name>        # eradicate the named profile
   aemp showprofile <name>       # display given profile
   aemp showconfig <name>        # display effective config

   # debugging
   aemp trace <nodeid>           # trace the network topology

=head1 DESCRIPTION

With aemp you can configure various aspects of AnyEvent::MP and its
protocol.

You can also start a "default node", a node that only depends on the
static configuration.

=cut

use common::sense;

# should come before anything else, so all modules
# will be loaded on each restart
#BEGIN {
   if ($ARGV[0] eq "run") {
      shift;

      # d'oh
#      require AnyEvent::Watchdog;
      # now we can load extra modules

#      AnyEvent::Watchdog::autorestart (1);
#      AnyEvent::Watchdog::heartbeat (300);

      require AnyEvent;
      require AnyEvent::MP;
      AnyEvent::MP::initialise_node (@ARGV);

      AnyEvent::detect () eq "AnyEvent::Impl::EV"
         ? EV::loop ()
         : AE::cv ()->recv;
   }
#}

use Carp ();

use JSON::XS;

use AnyEvent;
use AnyEvent::Util;

use AnyEvent::MP;
use AnyEvent::MP::Config;

sub my_run_cmd {
   my ($cmd) = @_;

   my $cv = &run_cmd;
   my $status = $cv->recv;

   $status
      and die "@$cmd: command failed with exit status $status.";
}

sub gen_cert {
   my_run_cmd [qw(openssl req 
                     -new -nodes -x509 -days 3650
                     -newkey rsa:2048 -keyout /dev/fd/3
                     -batch -subj /CN=AnyEvent::MP
              )],
      "<", "/dev/null",
      ">" , \my $cert,
      "3>", \my $key,
      "2>", "/dev/null";

   "$cert$key"
}

our $cfg     = AnyEvent::MP::Config::config;
our $profile = $cfg;

sub trace {
   my ($node) = @_;
   my $cv = AE::cv;
   my %seen;

   my $to = AE::timer 15, 0, sub {
      warn "timeout\n";
      $cv->();
   };

   initialise_node "anon/";

   my $reply = port {
      my ($node, @neigh) = @_;

      @neigh = grep $_ ne $NODE, @neigh;

      print +(join " ", $node, @neigh), "\n";

      for (@neigh) {
         unless ($seen{$_}++) {
            $cv->begin;
            snd $_, up_nodes => $SELF => $_;
         }
      }

      $cv->end;
   };

   $cv->begin;
   snd $reply, seed => $node;

   $cv->recv;
}

sub docmd;

our %CMD = (
   snd => sub {
      my $port = shift @ARGV;
      initialise_node "anon/";

      snd $port, @ARGV; @ARGV = ();

      my $cv = AE::cv;
      my $to = AE::timer 5, 0, sub { $cv->("timeout") };
      mon $port, $cv;
      my $reply = port sub { &$cv };
      snd node_of $port, snd => $reply, "message sent successfully";

      print join " ", $cv->recv, "\n";
   },

   rpc => sub {
      my $port = shift @ARGV;
      initialise_node "anon/";

      my $cv = AE::cv;
      my $to = AE::timer 5, 0, sub { $cv->("timeout") };
      snd $port, @ARGV, port { &$cv }; @ARGV = ();
      mon $port, $cv;

      print join " ", $cv->recv, "\n";
   },

   mon => sub {
      my $port = shift @ARGV;
      initialise_node "anon/";

      mon $port, my $cv = AE::cv;
      print join " ", $cv->recv, "\n";
   },

   eval => sub {
      my $node = node_of shift @ARGV;
      my $expr = join " ", @ARGV; @ARGV = ();
      initialise_node "anon/";

      my $cv = AE::cv;
      my $to = AE::timer 5, 0, sub { $cv->("timeout") };
      AnyEvent::MP::Kernel::eval_on $node, $expr, port { &$cv };
      mon $node, $cv;

      my ($err, @res) = $cv->recv;

      die $err if length $err;

      print +(substr JSON::XS->new->encode (\@res), 1, -1), "\n";
   },

   trace => sub {
      @ARGV >= 1
         or die "node id missing\n";

      trace shift @ARGV;
   },

   setnodeid => sub {
      @ARGV >= 1
         or die "shared secret missing\n";

      $profile->{nodeid} = shift @ARGV;
      ++$cfg->{dirty};
   },
   delnodeid => sub {
      delete $profile->{nodeid};
      ++$cfg->{dirty};
   },

   setsecret => sub {
      @ARGV >= 1
         or die "shared secret missing\n";

      $profile->{secret} = shift @ARGV;
      ++$cfg->{dirty};
   },
   gensecret => sub {
      $profile->{secret} = AnyEvent::MP::Kernel::alnumbits AnyEvent::MP::Kernel::nonce 64;
      ++$cfg->{dirty};
   },
   delsecret => sub {
      delete $profile->{secret};
      ++$cfg->{dirty};
   },

   setcert => sub {
      @ARGV >= 1
         or die "key+certificate pem filename missing\n";

      open my $fh, "<", $ARGV[0]
         or die "$ARGV[0]: $!";

      local $/;
      $profile->{cert} = <$fh>;
      ++$cfg->{dirty};
   },
   gencert => sub {
      $profile->{cert} = gen_cert;
      ++$cfg->{dirty};
   },
   delcert => sub {
      delete $profile->{cert};
      ++$cfg->{dirty};
   },

   setbinds => sub {
      @ARGV >= 1
         or die "bind addresses missing\n";
      $profile->{binds} = [split /,/, shift @ARGV];
      ++$cfg->{dirty};
   },
   delbinds => sub {
      delete $profile->{binds};
      ++$cfg->{dirty};
   },
   addbind => sub {
      @ARGV >= 1
         or die "bind address missing\n";
      my $bind = shift @ARGV;

      @{ $profile->{binds} } = grep $_ ne $bind, @{ $profile->{binds} };
      push @{ $profile->{binds} }, $bind;
      ++$cfg->{dirty};
   },
   delbind => sub {
      @ARGV >= 1
         or die "bind address missing\n";
      my $bind = shift @ARGV;

      @{ $profile->{binds} } = grep $_ ne $bind, @{ $profile->{binds} };
      ++$cfg->{dirty};
   },

   setseeds => sub {
      @ARGV >= 1
         or die "seed addresses missing\n";
      $profile->{seeds} = [split /,/, shift @ARGV];
      ++$cfg->{dirty};
   },
   delseeds => sub {
      delete $profile->{seeds};
      ++$cfg->{dirty};
   },
   addseed => sub {
      @ARGV >= 1
         or die "seed address missing\n";
      my $seed = shift @ARGV;

      @{ $profile->{seeds} } = grep $_ ne $seed, @{ $profile->{seeds} };
      push @{ $profile->{seeds} }, $seed;
      ++$cfg->{dirty};
   },
   delseed => sub {
      @ARGV >= 1
         or die "seed address missing\n";
      my $seed = shift @ARGV;

      @{ $profile->{seeds} } = grep $_ ne $seed, @{ $profile->{seeds} };
      ++$cfg->{dirty};
   },

   setservices => sub {
      @ARGV >= 1
         or die "service specifications missing\n";
      $profile->{services} = [split /,/, shift @ARGV];
      @ARGV = ();
      ++$cfg->{dirty};
   },
   delservices => sub {
      delete $profile->{services};
      ++$cfg->{dirty};
   },
   addservice => sub {
      @ARGV >= 1
         or die "service specification missing\n";
      my $service = shift @ARGV;
      push @{ $profile->{services} }, $service;
      ++$cfg->{dirty};
   },
   delservice => sub {
      @ARGV >= 1
         or die "service specification missing\n";
      my $service = shift @ARGV;
      for (0 .. $#{ $profile->{services} }) {
         next unless $profile->{services}[$_] eq $service;
         splice @{ $profile->{services} }, $_, 1;
         last;
      }
      ++$cfg->{dirty};
   },

   profile => sub {
      @ARGV >= 1
         or die "profile name is missing\n";
      my $name = shift @ARGV;

      $profile = $cfg->{profile}{$name} ||= {};
      ++$cfg->{dirty};
   },
   delprofile => sub {
      @ARGV >= 1
         or die "profile name is missing\n";
      my $name = shift @ARGV;

      delete $cfg->{profile}{$name};
      ++$cfg->{dirty};
   },
   showprofile => sub {
      @ARGV >= 1
         or die "profile name is missing\n";
      my $name = shift @ARGV;

      print JSON::XS->new->pretty->encode ($cfg->{profile}{$name} || {});
   },
   showconfig => sub {
      my $name = @ARGV ? shift @ARGV : AnyEvent::MP::Kernel::_nodename;

      print JSON::XS->new->pretty->encode (AnyEvent::MP::Config::find_profile $name);
   },
);

sub docmd {
   my $cmd = shift @ARGV;

   $CMD{$cmd}
      or die "$cmd: no such aemp command (try man aemp)";

   $CMD{$cmd}();
}

@ARGV
   or die "Usage: aemp subcommand ... (try man aemp)\n";

docmd while @ARGV;


Revision:	1.21
Committed:	Sun Aug 30 13:27:22 2009 UTC (17 years ago) by root
Branch:	MAIN
Changes since 1.20:	+0 -19 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#!/opt/bin/perl
2
3			=head1 NAME
4
5			aemp - AnyEvent:MP utility
6
7			=head1 SYNOPSIS
8
9			aemp command args...
10
11			# protocol commands
12	root	1.19	aemp snd <port> <arg...> # send a message
13			aemp mon <port> # wait till port is killed
14			aemp rpc <port> <arg...> # send message, append reply
15			aemp eval <node> <expr...> # evaluate expression
16	root	1.8
17			# run a node
18	root	1.19	aemp run initialise_args... # run a node
19	root	1.8
20			# node configuration: protocol endpoints
21	root	1.19	aemp setnodeid <nodeid> # configure the real node id
22			aemp delnodeid # reset node id to default (= inherit)
23	root	1.1
24			# node configuration: secret
25	root	1.19	aemp gensecret # generate a random shared secret
26			aemp setsecret <secret> # set the shared secret
27			aemp delsecret # remove the secret (= inherit)
28	root	1.1
29			# node configuration: TLS
30	root	1.19	aemp gencert # generate a random certificate
31			aemp setcert <file> # set a certificate (key.pem + certificate.pem)
32			aemp delcert # remove certificate (= inherit)
33	root	1.8
34	root	1.17	# node configuration: seed addresses for bootstrapping
35	root	1.19	aemp setseeds <host:port>,... # set seeds
36			aemp delseeds # clear all seeds (= inherit)
37			aemp addseed <host:port> # add a seed
38			aemp delseed <host:port> # remove seed
39	root	1.17
40			# node configuration: bind addresses
41	root	1.19	aemp setbinds <host:port>,... # set binds
42			aemp delbinds # clear all binds (= inherit)
43			aemp addbind <host:port> # add a bind address
44			aemp delbind <host:port> # remove a bind address
45	root	1.8
46			# node configuration: services
47	root	1.19	aemp setservices initfunc,... # set service functions
48			aemp delservices # clear all services (= inherit)
49			aemp addservice <initfunc> # add an instance of a service
50			aemp delservice <initfunc> # delete one instance of a service
51	root	1.6
52	root	1.10	# profile-specific configuration
53			aemp profile <name> <command>... # apply command to profile only
54	root	1.19	aemp delprofile <name> # eradicate the named profile
55			aemp showprofile <name> # display given profile
56			aemp showconfig <name> # display effective config
57	root	1.10
58	root	1.11	# debugging
59	root	1.19	aemp trace <nodeid> # trace the network topology
60	root	1.11
61	root	1.1	=head1 DESCRIPTION
62
63	root	1.8	With aemp you can configure various aspects of AnyEvent::MP and its
64			protocol.
65
66			You can also start a "default node", a node that only depends on the
67			static configuration.
68	root	1.1
69			=cut
70
71			use common::sense;
72
73	root	1.19	# should come before anything else, so all modules
74			# will be loaded on each restart
75	root	1.20	#BEGIN {
76	root	1.8	if ($ARGV[0] eq "run") {
77			shift;
78
79	root	1.13	# d'oh
80	root	1.20	# require AnyEvent::Watchdog;
81	root	1.19	# now we can load extra modules
82
83	root	1.20	# AnyEvent::Watchdog::autorestart (1);
84			# AnyEvent::Watchdog::heartbeat (300);
85	root	1.13
86	root	1.8	require AnyEvent;
87			require AnyEvent::MP;
88			AnyEvent::MP::initialise_node (@ARGV);
89
90	root	1.16	AnyEvent::detect () eq "AnyEvent::Impl::EV"
91	root	1.8	? EV::loop ()
92			: AE::cv ()->recv;
93			}
94	root	1.20	#}
95	root	1.8
96	root	1.1	use Carp ();
97
98	root	1.17	use JSON::XS;
99
100	root	1.1	use AnyEvent;
101	root	1.4	use AnyEvent::Util;
102
103	root	1.8	use AnyEvent::MP;
104	root	1.1	use AnyEvent::MP::Config;
105
106			sub my_run_cmd {
107			my ($cmd) = @_;
108
109			my $cv = &run_cmd;
110			my $status = $cv->recv;
111
112			$status
113			and die "@$cmd: command failed with exit status $status.";
114			}
115
116			sub gen_cert {
117	root	1.2	my_run_cmd [qw(openssl req
118			-new -nodes -x509 -days 3650
119			-newkey rsa:2048 -keyout /dev/fd/3
120			-batch -subj /CN=AnyEvent::MP
121			)],
122	root	1.5	"<", "/dev/null",
123	root	1.1	">" , \my $cert,
124			"3>", \my $key,
125	root	1.4	"2>", "/dev/null";
126	root	1.1
127			"$cert$key"
128			}
129
130	root	1.10	our $cfg = AnyEvent::MP::Config::config;
131	root	1.8	our $profile = $cfg;
132	root	1.1
133	root	1.11	sub trace {
134			my ($node) = @_;
135			my $cv = AE::cv;
136			my %seen;
137
138			my $to = AE::timer 15, 0, sub {
139			warn "timeout\n";
140			$cv->();
141			};
142
143	root	1.19	initialise_node "anon/";
144	root	1.11
145			my $reply = port {
146	root	1.12	my ($node, @neigh) = @_;
147	root	1.11
148	root	1.12	@neigh = grep $_ ne $NODE, @neigh;
149
150			print +(join " ", $node, @neigh), "\n";
151
152			for (@neigh) {
153	root	1.11	unless ($seen{$_}++) {
154			$cv->begin;
155			snd $_, up_nodes => $SELF => $_;
156			}
157			}
158
159			$cv->end;
160			};
161
162			$cv->begin;
163			snd $reply, seed => $node;
164
165			$cv->recv;
166			}
167
168	root	1.10	sub docmd;
169
170	root	1.1	our %CMD = (
171			snd => sub {
172	root	1.17	my $port = shift @ARGV;
173	root	1.19	initialise_node "anon/";
174	root	1.1
175	root	1.7	snd $port, @ARGV; @ARGV = ();
176	root	1.1
177			my $cv = AE::cv;
178	root	1.7	my $to = AE::timer 5, 0, sub { $cv->("timeout") };
179	root	1.1	mon $port, $cv;
180	root	1.19	my $reply = port sub { &$cv };
181			snd node_of $port, snd => $reply, "message sent successfully";
182	root	1.1
183			print join " ", $cv->recv, "\n";
184			},
185
186	root	1.7	rpc => sub {
187	root	1.17	my $port = shift @ARGV;
188	root	1.19	initialise_node "anon/";
189	root	1.7
190			my $cv = AE::cv;
191			my $to = AE::timer 5, 0, sub { $cv->("timeout") };
192	root	1.19	snd $port, @ARGV, port { &$cv }; @ARGV = ();
193	root	1.7	mon $port, $cv;
194
195			print join " ", $cv->recv, "\n";
196			},
197
198	root	1.1	mon => sub {
199	root	1.17	my $port = shift @ARGV;
200	root	1.19	initialise_node "anon/";
201	root	1.1
202			mon $port, my $cv = AE::cv;
203			print join " ", $cv->recv, "\n";
204			},
205
206	root	1.19	eval => sub {
207			my $node = node_of shift @ARGV;
208			my $expr = join " ", @ARGV; @ARGV = ();
209			initialise_node "anon/";
210
211			my $cv = AE::cv;
212			my $to = AE::timer 5, 0, sub { $cv->("timeout") };
213			AnyEvent::MP::Kernel::eval_on $node, $expr, port { &$cv };
214			mon $node, $cv;
215
216			my ($err, @res) = $cv->recv;
217
218			die $err if length $err;
219
220			print +(substr JSON::XS->new->encode (\@res), 1, -1), "\n";
221			},
222
223	root	1.11	trace => sub {
224			@ARGV >= 1
225	root	1.17	or die "node id missing\n";
226	root	1.11
227	root	1.17	trace shift @ARGV;
228	root	1.11	},
229
230	root	1.17	setnodeid => sub {
231	root	1.8	@ARGV >= 1
232			or die "shared secret missing\n";
233
234	root	1.17	$profile->{nodeid} = shift @ARGV;
235	root	1.8	++$cfg->{dirty};
236			},
237	root	1.17	delnodeid => sub {
238			delete $profile->{nodeid};
239	root	1.8	++$cfg->{dirty};
240			},
241
242	root	1.1	setsecret => sub {
243	root	1.8	@ARGV >= 1
244	root	1.1	or die "shared secret missing\n";
245
246	root	1.8	$profile->{secret} = shift @ARGV;
247	root	1.1	++$cfg->{dirty};
248			},
249			gensecret => sub {
250	root	1.18	$profile->{secret} = AnyEvent::MP::Kernel::alnumbits AnyEvent::MP::Kernel::nonce 64;
251	root	1.1	++$cfg->{dirty};
252			},
253	root	1.17	delsecret => sub {
254	root	1.8	delete $profile->{secret};
255	root	1.1	++$cfg->{dirty};
256			},
257
258			setcert => sub {
259	root	1.8	@ARGV >= 1
260	root	1.1	or die "key+certificate pem filename missing\n";
261
262			open my $fh, "<", $ARGV[0]
263			or die "$ARGV[0]: $!";
264
265			local $/;
266	root	1.8	$profile->{cert} = <$fh>;
267	root	1.1	++$cfg->{dirty};
268			},
269			gencert => sub {
270	root	1.8	$profile->{cert} = gen_cert;
271	root	1.1	++$cfg->{dirty};
272			},
273	root	1.17	delcert => sub {
274	root	1.8	delete $profile->{cert};
275	root	1.1	++$cfg->{dirty};
276			},
277	root	1.6
278	root	1.17	setbinds => sub {
279	root	1.19	@ARGV >= 1
280			or die "bind addresses missing\n";
281			$profile->{binds} = [split /,/, shift @ARGV];
282	root	1.17	++$cfg->{dirty};
283			},
284			delbinds => sub {
285			delete $profile->{binds};
286			++$cfg->{dirty};
287			},
288			addbind => sub {
289			@ARGV >= 1
290			or die "bind address missing\n";
291			my $bind = shift @ARGV;
292
293			@{ $profile->{binds} } = grep $_ ne $bind, @{ $profile->{binds} };
294			push @{ $profile->{binds} }, $bind;
295			++$cfg->{dirty};
296			},
297			delbind => sub {
298			@ARGV >= 1
299			or die "bind address missing\n";
300			my $bind = shift @ARGV;
301
302			@{ $profile->{binds} } = grep $_ ne $bind, @{ $profile->{binds} };
303			++$cfg->{dirty};
304			},
305
306	root	1.6	setseeds => sub {
307	root	1.19	@ARGV >= 1
308			or die "seed addresses missing\n";
309			$profile->{seeds} = [split /,/, shift @ARGV];
310	root	1.6	++$cfg->{dirty};
311			},
312	root	1.17	delseeds => sub {
313			delete $profile->{seeds};
314			++$cfg->{dirty};
315			},
316	root	1.6	addseed => sub {
317	root	1.10	@ARGV >= 1
318	root	1.17	or die "seed address missing\n";
319	root	1.6	my $seed = shift @ARGV;
320	root	1.10
321	root	1.8	@{ $profile->{seeds} } = grep $_ ne $seed, @{ $profile->{seeds} };
322			push @{ $profile->{seeds} }, $seed;
323			++$cfg->{dirty};
324			},
325			delseed => sub {
326	root	1.10	@ARGV >= 1
327	root	1.17	or die "seed address missing\n";
328	root	1.8	my $seed = shift @ARGV;
329	root	1.10
330	root	1.8	@{ $profile->{seeds} } = grep $_ ne $seed, @{ $profile->{seeds} };
331			++$cfg->{dirty};
332			},
333
334			setservices => sub {
335	root	1.19	@ARGV >= 1
336			or die "service specifications missing\n";
337			$profile->{services} = [split /,/, shift @ARGV];
338	root	1.8	@ARGV = ();
339	root	1.6	++$cfg->{dirty};
340			},
341	root	1.17	delservices => sub {
342			delete $profile->{services};
343			++$cfg->{dirty};
344			},
345	root	1.9	addservice => sub {
346	root	1.10	@ARGV >= 1
347			or die "service specification missing\n";
348	root	1.8	my $service = shift @ARGV;
349			push @{ $profile->{services} }, $service;
350			++$cfg->{dirty};
351			},
352	root	1.9	delservice => sub {
353	root	1.10	@ARGV >= 1
354			or die "service specification missing\n";
355	root	1.8	my $service = shift @ARGV;
356			for (0 .. $#{ $profile->{services} }) {
357			next unless $profile->{services}[$_] eq $service;
358			splice @{ $profile->{services} }, $_, 1;
359			last;
360			}
361	root	1.6	++$cfg->{dirty};
362			},
363	root	1.10
364			profile => sub {
365	root	1.19	@ARGV >= 1
366			or die "profile name is missing\n";
367	root	1.10	my $name = shift @ARGV;
368
369			$profile = $cfg->{profile}{$name} \|\|= {};
370	root	1.14	++$cfg->{dirty};
371	root	1.10	},
372			delprofile => sub {
373			@ARGV >= 1
374			or die "profile name is missing\n";
375			my $name = shift @ARGV;
376
377			delete $cfg->{profile}{$name};
378	root	1.14	++$cfg->{dirty};
379	root	1.10	},
380	root	1.17	showprofile => sub {
381			@ARGV >= 1
382			or die "profile name is missing\n";
383			my $name = shift @ARGV;
384
385			print JSON::XS->new->pretty->encode ($cfg->{profile}{$name} \|\| {});
386			},
387			showconfig => sub {
388			my $name = @ARGV ? shift @ARGV : AnyEvent::MP::Kernel::_nodename;
389
390			print JSON::XS->new->pretty->encode (AnyEvent::MP::Config::find_profile $name);
391			},
392	root	1.1	);
393
394			sub docmd {
395			my $cmd = shift @ARGV;
396
397			$CMD{$cmd}
398			or die "$cmd: no such aemp command (try man aemp)";
399
400			$CMD{$cmd}();
401			}
402
403			@ARGV
404			or die "Usage: aemp subcommand ... (try man aemp)\n";
405
406	root	1.19	docmd while @ARGV;
407	root	1.1
408