8 use POSIX qw{:errno_h :fcntl_h};
10 ###--------------------------------------------------------------------------
13 my %C = (config => "$ENV{HOME}/.disorder/passwd",
14 lockdir => "$ENV{HOME}/.disorder/",
17 my $TITLE = "DisOrder";
18 my $VARIANT = "default";
19 if (-l $C{config} && (my $t = readlink $C{config}) =~ /^passwd\.(.*)$/)
20 { $VARIANT = $1; $TITLE .= " ($1)"; }
22 ###--------------------------------------------------------------------------
25 sub run_discard_output (@) {
28 open STDOUT, ">/dev/null" or die "open /dev/null: $!";
34 if ($? >= 256) { $st = sprintf "rc = %d", $? >> 8; }
35 else { $st = sprintf "signal %d", $?; }
36 die "$_[0] failed ($st)";
41 my ($head, $body) = @_;
43 $body =~ s:\&:&:g;
47 ##print "****************\n$head\n\n$body\n"; return;
49 run_discard_output "notify-send",
50 "-c", "DisOrder", "-i", "audio-volume-high", "-t", "5000",
57 die $@ if $@ and $@->errno != ENOENT;
60 ###--------------------------------------------------------------------------
63 my $LKFILE = "$C{lockdir}/disorder-notify-$VARIANT.lock";
68 ## Try to open the lock file. If it's not there, then obviously it's not
71 eval { open $fh, "<", $LKFILE; };
73 return undef if $@->errno == ENOENT;
77 ## Take out a non-exclusive lock on the lock file.
78 my $lk = new File::FcntlLock;
79 $lk->l_type(F_RDLCK); $lk->l_whence(SEEK_SET);
80 $lk->l_start(0); $lk->l_len(0);
81 if ($lk->lock($fh, F_SETLK)) { close $fh; return undef; }
83 ## Read the pid of the current lock-holder.
84 chomp (my $pid = (readline $fh) // "<unknown>");
90 sysopen my $fh, $LKFILE, O_CREAT | O_WRONLY;
92 my $lk = new File::FcntlLock;
93 $lk->l_type(F_WRLCK); $lk->l_whence(SEEK_SET);
94 $lk->l_start(0); $lk->l_len(0);
95 if (!$lk->lock($fh, F_SETLK)) {
96 return undef if $! == EAGAIN;
97 die "failed to lock `$LKFILE': $!";
107 ###--------------------------------------------------------------------------
108 ### DisOrder utilities.
115 my @f = split_fields readline $sk;
116 if ($f[1] ne "state") { last LINE; }
117 elsif ($f[2] eq "enable_random") { $st{random} = 1; }
118 elsif ($f[2] eq "disable_random") { $st{random} = 0; }
119 elsif ($f[2] eq "enable_play") { $st{play} = 1; }
120 elsif ($f[2] eq "disable_play") { $st{play} = 0; }
121 elsif ($f[2] eq "resume") { $st{pause} = 0; }
122 elsif ($f[2] eq "pause") { $st{pause} = 1; }
129 sub configured_connection (;$) {
131 $CONF //= load_config $C{config};
132 return connect_to_server %$CONF, $quietp // 0;
136 my $sk = configured_connection;
137 send_command0 $sk, "log";
138 my $st = get_state0 $sk;
143 sub decode_track_name ($\%) {
144 my ($sk, $info) = @_;
145 return unless exists $info->{track};
146 my $track = $info->{track};
147 for my $i ("artist", "album", "title") {
148 my @f = split_fields send_command $sk, "part", $track, "display", "$i";
153 sub fmt_duration ($) {
155 return sprintf "%d:%02d", int $n/60, $n%60;
158 sub format_now_playing (\%) {
160 exists $info->{track} or return "Nothing.";
161 my $r = "$info->{artist}: ‘$info->{title}’";
162 $r .= ", from ‘$info->{album}’" if $info->{album};
163 exists $info->{sofar} && exists $info->{length} and
164 $r .= sprintf " (%s/%s)",
165 fmt_duration $info->{sofar}, fmt_duration $info->{length};
166 $r .= "\n(chosen by $info->{submitter})" if exists $info->{submitter};
170 sub get_now_playing ($) {
172 my $r = send_command $sk, "playing";
173 defined $r or return {};
174 my %info = split_fields $r;
175 decode_track_name $sk, %info;
176 exists $info{sofar} and
177 $info{length} = send_command $sk, "length", $info{track};
181 sub watch_and_notify0 ($) {
182 my ($now_playing) = @_;
184 my $sk = configured_connection 1;
185 my $sk_log = configured_connection 1;
187 send_command0 $sk_log, "log";
188 my $st = get_state0 $sk_log;
189 my $msg = "playing " . ($st->{play} ? "enabled" : "disabled");
190 $msg .= "; random play " . ($st->{random} ? "enabled" : "disabled");
191 $msg .= "; " . ($st->{pause} ? "paused" : "playing");
192 notify "$TITLE state", "Connected: $msg";
193 if ($st->{play} && $now_playing) {
194 my $info = get_now_playing $sk;
195 notify "$TITLE: Now playing", format_now_playing %$info;
198 fcntl $sk_log, F_SETFL, (fcntl $sk_log, F_GETFL, 0) | O_NONBLOCK;
201 my $rdin = ""; vec($rdin, (fileno $sk_log), 1) = 1;
205 for my $line (@lines) {
206 my @f = split_fields $line;
207 if ($f[1] eq "state") {
209 if ($f[2] eq "disable_random") { $msg = "Random play disabled"; }
210 elsif ($f[2] eq "enable_random") { $msg = "Random play enabled"; }
211 elsif ($f[2] eq "disable_play") { $msg = "Playing disabled"; }
212 elsif ($f[2] eq "enable_play") { $msg = "Playing enabled"; }
213 elsif ($f[2] eq "pause") { $msg = "Paused"; }
214 elsif ($f[2] eq "resume") { $msg = "Playing"; }
215 notify "$TITLE state", $msg if defined $msg;
216 } elsif ($f[1] eq "playing") {
218 $info{track} = $f[2];
219 $info{submitter} = $f[3] if @f > 3;
220 decode_track_name $sk, %info;
221 notify "$TITLE: Now playing", format_now_playing %info;
222 } elsif ($f[1] eq "scratched") {
224 $info{track} = $f[2];
225 decode_track_name $sk, %info;
226 notify "$TITLE: Scratched by $f[3]", format_now_playing %info;
230 if (!$sk_log) { $loss = "EOF from server"; last WATCH; }
231 my $nfd = select my $rdout = $rdin, undef, undef, 60;
233 eval { print $sk_log "."; flush $sk_log; };
234 if ($@) { $loss = "error from write: " . $@->errno; last WATCH; }
239 eval { $n = sysread $sk_log, $b, 4096; };
240 if ($@ && $@->errno == EAGAIN) { last READ; }
241 elsif ($@) { $loss = "error from read: " . $@->errno; last WATCH; }
242 elsif (!$n) { close $sk_log; $sk_log = undef; last READ; }
243 else { $buffer .= $b; }
246 @lines = split /\n/, $buffer, -1;
247 $buffer = pop @lines;
251 notify "$TITLE state", "Lost connection: $loss";
254 close $sk_log if defined $sk_log;
257 sub watch_and_notify ($) {
258 my ($now_playing) = @_;
260 claim_lock or exit 1;
263 eval { watch_and_notify0 $now_playing; };
269 ###--------------------------------------------------------------------------
270 ### User-facing operations.
275 sub { run_discard_output "amixer", "sset", $C{mixer}, "5\%+"; };
277 sub { run_discard_output "amixer", "sset", $C{mixer}, "5\%-"; };
279 $OP{"scratch"} = sub {
280 my $sk = configured_connection;
281 send_command $sk, "scratch";
285 $OP{"enable/disable"} = sub {
287 my $sk =configured_connection;
288 if ($st->{play}) { send_command $sk, "disable"; }
289 else { send_command $sk, "enable"; }
293 $OP{"play/pause"} = sub {
295 my $sk = configured_connection;
297 send_command $sk, "enable";
298 if ($st->{pause}) { send_command $sk, "resume"; }
300 if ($st->{pause}) { send_command $sk, "resume"; }
301 else { send_command $sk, "pause"; }
307 if (defined (my $lkpid = locked_by)) {
308 print STDERR "$0: already watched by pid $lkpid\n";
314 $OP{"now-playing"} = sub {
315 my $sk = configured_connection;
316 my $info = get_now_playing $sk;
318 print format_now_playing %$info;
322 $OP{"notify-now-playing"} = sub {
323 my $sk = configured_connection;
324 my $info = get_now_playing $sk;
326 notify "$TITLE: Now playing", format_now_playing %$info;
327 unless (defined locked_by) {
333 $OP{"next-config"} = sub {
334 (my $dir = $C{config}) =~ s:/[^/]*$::;
335 my (@conf, $curr, $conf, $min);
337 if (-l $C{config} && (my $t = readlink $C{config}) =~ /^passwd\.(.*)$/)
340 opendir my $dh, +$dir;
341 FILE: while (my $f = readdir $dh)
342 { push @conf, $1 if $f =~ /^passwd\.(.*[^~])$/; }
344 for (my $i = 0; $i < @conf; $i++) {
345 $min = $conf[$i] if (!defined $min) || $conf[$i] lt $min;
347 if ((!defined $curr) || $curr lt $conf[$i]) &&
348 ((!defined $conf) || $conf[$i] lt $conf);
350 $conf = $min unless defined $conf;
352 try_unlink "$dir/passwd.new";
353 symlink "passwd.$conf", "$dir/passwd.new";
354 rename "$dir/passwd.new", "$dir/passwd";
355 notify "DisOrder configuration", "Switched to `$conf'";
358 ###--------------------------------------------------------------------------
361 if (@ARGV != 1) { print STDERR "usage: $0 OP\n"; exit 2; }
363 if (!exists $OP{$op}) { print STDERR "$0: unknown op `$op'\n"; exit 2; }
366 ###----- That's all, folks --------------------------------------------------