Commit | Line | Data |
---|---|---|
a1b30762 MW |
1 | #! /usr/bin/perl -w |
2 | ||
3 | use autodie qw{:all}; | |
4 | use strict; | |
5 | ||
6 | use DisOrder; | |
7 | use File::FcntlLock; | |
21ec4bc8 MW |
8 | use Getopt::Long qw{:config gnu_compat bundling |
9 | require_order no_getopt_compat}; | |
a1b30762 MW |
10 | use POSIX qw{:errno_h :fcntl_h}; |
11 | ||
12 | ###-------------------------------------------------------------------------- | |
13 | ### Configuration. | |
14 | ||
15 | my %C = (config => "$ENV{HOME}/.disorder/passwd", | |
16 | lockdir => "$ENV{HOME}/.disorder/", | |
17 | mixer => "Master,0"); | |
18 | ||
21ec4bc8 | 19 | (my $PROG = $0) =~ s:^.*/::; |
a1b30762 MW |
20 | my $TITLE = "DisOrder"; |
21 | my $VARIANT = "default"; | |
22 | if (-l $C{config} && (my $t = readlink $C{config}) =~ /^passwd\.(.*)$/) | |
23 | { $VARIANT = $1; $TITLE .= " ($1)"; } | |
24 | ||
25 | ###-------------------------------------------------------------------------- | |
26 | ### Random utilities. | |
27 | ||
28 | sub run_discard_output (@) { | |
29 | my $kid = fork(); | |
30 | if (!$kid) { | |
31 | open STDOUT, ">/dev/null" or die "open /dev/null: $!"; | |
32 | exec @_; | |
33 | } | |
34 | waitpid $kid, 0; | |
35 | if ($?) { | |
36 | my $st; | |
37 | if ($? >= 256) { $st = sprintf "rc = %d", $? >> 8; } | |
38 | else { $st = sprintf "signal %d", $?; } | |
39 | die "$_[0] failed ($st)"; | |
40 | } | |
41 | } | |
6bdf3aad MW |
42 | |
43 | sub notify ($$) { | |
44 | my ($head, $body) = @_; | |
45 | ||
0452eefc MW |
46 | $body =~ s:\&:&:g; |
47 | $body =~ s:\<:<:g; | |
48 | $body =~ s:\>:>:g; | |
a1b30762 MW |
49 | |
50 | ##print "****************\n$head\n\n$body\n"; return; | |
51 | ||
52 | run_discard_output "notify-send", | |
53 | "-c", "DisOrder", "-i", "audio-volume-high", "-t", "5000", | |
54 | $head, $body; | |
55 | } | |
56 | ||
57 | sub try_unlink ($) { | |
58 | my ($f) = @_; | |
59 | eval { unlink $f; }; | |
60 | die $@ if $@ and $@->errno != ENOENT; | |
61 | } | |
62 | ||
63 | ###-------------------------------------------------------------------------- | |
64 | ### Locking protocol. | |
65 | ||
66 | my $LKFILE = "$C{lockdir}/disorder-notify-$VARIANT.lock"; | |
67 | my $LKFH; | |
68 | ||
69 | sub locked_by () { | |
70 | ||
71 | ## Try to open the lock file. If it's not there, then obviously it's not | |
72 | ## locked. | |
73 | my $fh; | |
74 | eval { open $fh, "<", $LKFILE; }; | |
75 | if ($@) { | |
76 | return undef if $@->errno == ENOENT; | |
77 | die $@; | |
6bdf3aad | 78 | } |
a1b30762 MW |
79 | |
80 | ## Take out a non-exclusive lock on the lock file. | |
81 | my $lk = new File::FcntlLock; | |
82 | $lk->l_type(F_RDLCK); $lk->l_whence(SEEK_SET); | |
83 | $lk->l_start(0); $lk->l_len(0); | |
84 | if ($lk->lock($fh, F_SETLK)) { close $fh; return undef; } | |
85 | ||
86 | ## Read the pid of the current lock-holder. | |
87 | chomp (my $pid = (readline $fh) // "<unknown>"); | |
88 | close $fh; | |
89 | return $pid; | |
6bdf3aad MW |
90 | } |
91 | ||
a1b30762 MW |
92 | sub claim_lock () { |
93 | sysopen my $fh, $LKFILE, O_CREAT | O_WRONLY; | |
94 | ||
95 | my $lk = new File::FcntlLock; | |
96 | $lk->l_type(F_WRLCK); $lk->l_whence(SEEK_SET); | |
97 | $lk->l_start(0); $lk->l_len(0); | |
98 | if (!$lk->lock($fh, F_SETLK)) { | |
99 | return undef if $! == EAGAIN; | |
100 | die "failed to lock `$LKFILE': $!"; | |
101 | } | |
102 | ||
103 | truncate $fh, 0; | |
104 | print $fh "$$\n"; | |
105 | flush $fh; | |
106 | $LKFH = $fh; | |
107 | 1; | |
994838b7 MW |
108 | } |
109 | ||
a1b30762 MW |
110 | ###-------------------------------------------------------------------------- |
111 | ### DisOrder utilities. | |
112 | ||
113 | sub get_state0 ($) { | |
114 | my ($sk) = @_; | |
115 | my %st = (); | |
116 | ||
117 | LINE: for (;;) { | |
118 | my @f = split_fields readline $sk; | |
119 | if ($f[1] ne "state") { last LINE; } | |
120 | elsif ($f[2] eq "enable_random") { $st{random} = 1; } | |
121 | elsif ($f[2] eq "disable_random") { $st{random} = 0; } | |
122 | elsif ($f[2] eq "enable_play") { $st{play} = 1; } | |
123 | elsif ($f[2] eq "disable_play") { $st{play} = 0; } | |
124 | elsif ($f[2] eq "resume") { $st{pause} = 0; } | |
125 | elsif ($f[2] eq "pause") { $st{pause} = 1; } | |
a367c2fe | 126 | } |
a1b30762 | 127 | return \%st; |
f1b1fa59 MW |
128 | } |
129 | ||
be626dd5 MW |
130 | my $CONF = undef; |
131 | ||
132 | sub configured_connection (;$) { | |
133 | my ($quietp) = @_; | |
134 | $CONF //= load_config $C{config}; | |
135 | return connect_to_server %$CONF, $quietp // 0; | |
136 | } | |
137 | ||
a1b30762 | 138 | sub get_state () { |
be626dd5 | 139 | my $sk = configured_connection; |
a1b30762 MW |
140 | send_command0 $sk, "log"; |
141 | my $st = get_state0 $sk; | |
142 | close $sk; | |
143 | return $st; | |
144 | } | |
145 | ||
146 | sub decode_track_name ($\%) { | |
147 | my ($sk, $info) = @_; | |
148 | return unless exists $info->{track}; | |
149 | my $track = $info->{track}; | |
150 | for my $i ("artist", "album", "title") { | |
151 | my @f = split_fields send_command $sk, "part", $track, "display", "$i"; | |
152 | $info->{$i} = $f[0]; | |
153 | } | |
154 | } | |
155 | ||
16e1b76d MW |
156 | sub fmt_duration ($) { |
157 | my ($n) = @_; | |
158 | return sprintf "%d:%02d", int $n/60, $n%60; | |
159 | } | |
160 | ||
a1b30762 MW |
161 | sub get_now_playing ($) { |
162 | my ($sk) = @_; | |
163 | my $r = send_command $sk, "playing"; | |
164 | defined $r or return {}; | |
165 | my %info = split_fields $r; | |
166 | decode_track_name $sk, %info; | |
16e1b76d MW |
167 | exists $info{sofar} and |
168 | $info{length} = send_command $sk, "length", $info{track}; | |
a1b30762 MW |
169 | return \%info; |
170 | } | |
171 | ||
578deb0e MW |
172 | sub format_now_playing (;\%) { |
173 | my ($info) = @_; | |
174 | unless (defined $info) { | |
175 | my $sk = configured_connection; | |
176 | $info = get_now_playing $sk; | |
177 | close $sk; | |
178 | } | |
179 | exists $info->{track} or return "Nothing."; | |
180 | my $r = "$info->{artist}: ‘$info->{title}’"; | |
181 | $r .= ", from ‘$info->{album}’" if $info->{album}; | |
182 | exists $info->{sofar} && exists $info->{length} and | |
183 | $r .= sprintf " (%s/%s)", | |
184 | fmt_duration $info->{sofar}, fmt_duration $info->{length}; | |
185 | $r .= "\n(chosen by $info->{submitter})" if exists $info->{submitter}; | |
186 | return $r; | |
187 | } | |
188 | ||
a1b30762 MW |
189 | sub watch_and_notify0 ($) { |
190 | my ($now_playing) = @_; | |
191 | ||
be626dd5 MW |
192 | my $sk = configured_connection 1; |
193 | my $sk_log = configured_connection 1; | |
a1b30762 MW |
194 | |
195 | send_command0 $sk_log, "log"; | |
196 | my $st = get_state0 $sk_log; | |
197 | my $msg = "playing " . ($st->{play} ? "enabled" : "disabled"); | |
198 | $msg .= "; random play " . ($st->{random} ? "enabled" : "disabled"); | |
199 | $msg .= "; " . ($st->{pause} ? "paused" : "playing"); | |
200 | notify "$TITLE state", "Connected: $msg"; | |
201 | if ($st->{play} && $now_playing) { | |
202 | my $info = get_now_playing $sk; | |
203 | notify "$TITLE: Now playing", format_now_playing %$info; | |
204 | } | |
205 | ||
f6ef7584 MW |
206 | fcntl $sk_log, F_SETFL, (fcntl $sk_log, F_GETFL, 0) | O_NONBLOCK; |
207 | my $buffer = ""; | |
208 | my @lines = (); | |
209 | my $rdin = ""; vec($rdin, (fileno $sk_log), 1) = 1; | |
c7eee684 | 210 | my $loss; |
f6ef7584 MW |
211 | |
212 | WATCH: for (;;) { | |
213 | for my $line (@lines) { | |
214 | my @f = split_fields $line; | |
215 | if ($f[1] eq "state") { | |
216 | my $msg = undef; | |
73d8ef9e MW |
217 | if ($f[2] eq "disable_random") |
218 | { $st->{random} = 0; $msg = "Random play disabled"; } | |
219 | elsif ($f[2] eq "enable_random") | |
220 | { $st->{random} = 1; $msg = "Random play enabled"; } | |
221 | elsif ($f[2] eq "disable_play") | |
222 | { $st->{play} = 0; $msg = "Playing disabled"; } | |
223 | elsif ($f[2] eq "enable_play") | |
224 | { $st->{play} = 1; $msg = "Playing enabled"; } | |
225 | elsif ($f[2] eq "pause") | |
226 | { $st->{pause} = 1; $msg = "Paused"; } | |
227 | elsif ($f[2] eq "resume") | |
228 | { $st->{pause} = 0; $msg = "Playing"; } | |
f6ef7584 MW |
229 | notify "$TITLE state", $msg if defined $msg; |
230 | } elsif ($f[1] eq "playing") { | |
231 | my %info; | |
232 | $info{track} = $f[2]; | |
233 | $info{submitter} = $f[3] if @f > 3; | |
234 | decode_track_name $sk, %info; | |
235 | notify "$TITLE: Now playing", format_now_playing %info; | |
236 | } elsif ($f[1] eq "scratched") { | |
237 | my %info; | |
238 | $info{track} = $f[2]; | |
239 | decode_track_name $sk, %info; | |
240 | notify "$TITLE: Scratched by $f[3]", format_now_playing %info; | |
b52be1a0 MW |
241 | } elsif ($f[1] eq "completed" && !$st->{play}) { |
242 | notify "$TITLE state", "Stopped"; | |
f6ef7584 | 243 | } |
6bdf3aad | 244 | } |
f6ef7584 | 245 | |
c7eee684 | 246 | if (!$sk_log) { $loss = "EOF from server"; last WATCH; } |
50d7331d MW |
247 | my $nfd = select my $rdout = $rdin, undef, undef, 60; |
248 | if (!$nfd) { | |
249 | eval { print $sk_log "."; flush $sk_log; }; | |
250 | if ($@) { $loss = "error from write: " . $@->errno; last WATCH; } | |
251 | @lines = (); | |
252 | } else { | |
253 | READ: for (;;) { | |
254 | my ($b, $n); | |
255 | eval { $n = sysread $sk_log, $b, 4096; }; | |
256 | if ($@ && $@->errno == EAGAIN) { last READ; } | |
257 | elsif ($@) { $loss = "error from read: " . $@->errno; last WATCH; } | |
ba19b1ea | 258 | elsif (!$n) { close $sk_log; $sk_log = undef; last READ; } |
50d7331d MW |
259 | else { $buffer .= $b; } |
260 | } | |
f6ef7584 | 261 | |
50d7331d MW |
262 | @lines = split /\n/, $buffer, -1; |
263 | $buffer = pop @lines; | |
264 | } | |
6bdf3aad | 265 | } |
a1b30762 | 266 | |
c7eee684 | 267 | notify "$TITLE state", "Lost connection: $loss"; |
a1b30762 MW |
268 | |
269 | close $sk; | |
f6ef7584 | 270 | close $sk_log if defined $sk_log; |
6bdf3aad | 271 | } |
a1b30762 MW |
272 | |
273 | sub watch_and_notify ($) { | |
274 | my ($now_playing) = @_; | |
275 | ||
a1b30762 MW |
276 | claim_lock or exit 1; |
277 | ||
278 | for (;;) { | |
279 | eval { watch_and_notify0 $now_playing; }; | |
280 | $now_playing = 1; | |
281 | sleep 5; | |
282 | } | |
283 | } | |
284 | ||
285 | ###-------------------------------------------------------------------------- | |
286 | ### User-facing operations. | |
287 | ||
288 | my %OP; | |
289 | ||
290 | $OP{"volume-up"} = | |
291 | sub { run_discard_output "amixer", "sset", $C{mixer}, "5\%+"; }; | |
292 | $OP{"volume-down"} = | |
293 | sub { run_discard_output "amixer", "sset", $C{mixer}, "5\%-"; }; | |
294 | ||
295 | $OP{"scratch"} = sub { | |
be626dd5 | 296 | my $sk = configured_connection; |
a1b30762 MW |
297 | send_command $sk, "scratch"; |
298 | close $sk; | |
299 | }; | |
300 | ||
301 | $OP{"enable/disable"} = sub { | |
302 | my $st = get_state; | |
969abb5a | 303 | my $sk = configured_connection; |
a1b30762 MW |
304 | if ($st->{play}) { send_command $sk, "disable"; } |
305 | else { send_command $sk, "enable"; } | |
306 | close $sk; | |
307 | }; | |
308 | ||
309 | $OP{"play/pause"} = sub { | |
310 | my $st = get_state; | |
be626dd5 | 311 | my $sk = configured_connection; |
a1b30762 MW |
312 | if (!$st->{play}) { |
313 | send_command $sk, "enable"; | |
314 | if ($st->{pause}) { send_command $sk, "resume"; } | |
315 | } else { | |
316 | if ($st->{pause}) { send_command $sk, "resume"; } | |
317 | else { send_command $sk, "pause"; } | |
318 | } | |
319 | close $sk; | |
320 | }; | |
321 | ||
322 | $OP{"watch"} = sub { | |
323 | if (defined (my $lkpid = locked_by)) { | |
324 | print STDERR "$0: already watched by pid $lkpid\n"; | |
325 | exit 2; | |
326 | } | |
327 | watch_and_notify 1; | |
328 | }; | |
329 | ||
330 | $OP{"now-playing"} = sub { | |
be626dd5 | 331 | my $sk = configured_connection; |
a1b30762 MW |
332 | my $info = get_now_playing $sk; |
333 | close $sk; | |
334 | print format_now_playing %$info; | |
335 | print "\n"; | |
336 | }; | |
337 | ||
338 | $OP{"notify-now-playing"} = sub { | |
be626dd5 | 339 | my $sk = configured_connection; |
a1b30762 MW |
340 | my $info = get_now_playing $sk; |
341 | close $sk; | |
342 | notify "$TITLE: Now playing", format_now_playing %$info; | |
a9e2532b MW |
343 | unless (defined locked_by) { |
344 | fork and exit 0; | |
345 | watch_and_notify 0; | |
346 | } | |
a1b30762 MW |
347 | }; |
348 | ||
70291d8d MW |
349 | $OP{"next-config"} = sub { |
350 | (my $dir = $C{config}) =~ s:/[^/]*$::; | |
351 | my (@conf, $curr, $conf, $min); | |
352 | ||
353 | if (-l $C{config} && (my $t = readlink $C{config}) =~ /^passwd\.(.*)$/) | |
354 | { $curr = $1; } | |
355 | ||
356 | opendir my $dh, +$dir; | |
357 | FILE: while (my $f = readdir $dh) | |
358 | { push @conf, $1 if $f =~ /^passwd\.(.*[^~])$/; } | |
359 | ||
360 | for (my $i = 0; $i < @conf; $i++) { | |
361 | $min = $conf[$i] if (!defined $min) || $conf[$i] lt $min; | |
362 | $conf = $conf[$i] | |
363 | if ((!defined $curr) || $curr lt $conf[$i]) && | |
364 | ((!defined $conf) || $conf[$i] lt $conf); | |
365 | } | |
366 | $conf = $min unless defined $conf; | |
367 | ||
368 | try_unlink "$dir/passwd.new"; | |
369 | symlink "passwd.$conf", "$dir/passwd.new"; | |
370 | rename "$dir/passwd.new", "$dir/passwd"; | |
371 | notify "DisOrder configuration", "Switched to `$conf'"; | |
372 | }; | |
373 | ||
a1b30762 MW |
374 | ###-------------------------------------------------------------------------- |
375 | ### Main program. | |
376 | ||
21ec4bc8 MW |
377 | sub usage (\*) { |
378 | my ($fh) = @_; | |
379 | print $fh "usage: $PROG [-u CONFIG] COMMAND\n"; | |
380 | } | |
381 | ||
382 | sub help () { | |
383 | usage *STDOUT; | |
384 | print <<EOF; | |
385 | ||
386 | Command-line options: | |
387 | -h, --help Show this help text | |
388 | -u, --user-config Set user configuration file | |
389 | ||
390 | Commands: | |
391 | volume-up | |
392 | volume-down | |
393 | scratch | |
394 | enable/disable | |
395 | play/pause | |
396 | watch | |
397 | now-playing | |
398 | notify-now-playing | |
399 | next-config | |
400 | EOF | |
401 | } | |
402 | ||
403 | my $bad = 0; | |
404 | GetOptions | |
405 | "h|help" => sub { help; exit 0; }, | |
406 | "u|user-config=s" => \$C{config} | |
407 | or $bad = 1; | |
408 | @ARGV == 1 or $bad = 1; | |
409 | if ($bad) { usage *STDERR; exit 2; } | |
a1b30762 MW |
410 | my $op = $ARGV[0]; |
411 | if (!exists $OP{$op}) { print STDERR "$0: unknown op `$op'\n"; exit 2; } | |
412 | $OP{$op}(); | |
413 | ||
414 | ###----- That's all, folks -------------------------------------------------- |