8 use Getopt::Long qw{:config gnu_compat bundling
9 require_order no_getopt_compat};
10 use POSIX qw{:errno_h :fcntl_h};
12 ###--------------------------------------------------------------------------
15 my %C = (config => "$ENV{HOME}/.disorder/passwd",
16 lockdir => "$ENV{HOME}/.disorder/",
19 (my $PROG = $0) =~ s:^.*/::;
20 my $TITLE = "DisOrder";
21 my $VARIANT = "default";
22 if (-l $C{config} && (my $t = readlink $C{config}) =~ /^passwd\.(.*)$/)
23 { $VARIANT = $1; $TITLE .= " ($1)"; }
25 ###--------------------------------------------------------------------------
28 sub run_discard_output (@) {
31 open STDOUT, ">/dev/null" or die "open /dev/null: $!";
37 if ($? >= 256) { $st = sprintf "rc = %d", $? >> 8; }
38 else { $st = sprintf "signal %d", $?; }
39 die "$_[0] failed ($st)";
44 my ($head, $body) = @_;
46 $body =~ s:\&:&:g;
50 ##print "****************\n$head\n\n$body\n"; return;
52 run_discard_output "notify-send",
53 "-c", "DisOrder", "-i", "audio-volume-high", "-t", "5000",
60 die $@ if $@ and $@->errno != ENOENT;
63 ###--------------------------------------------------------------------------
66 my $LKFILE = "$C{lockdir}/disorder-notify-$VARIANT.lock";
71 ## Try to open the lock file. If it's not there, then obviously it's not
74 eval { open $fh, "<", $LKFILE; };
76 return undef if $@->errno == ENOENT;
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; }
86 ## Read the pid of the current lock-holder.
87 chomp (my $pid = (readline $fh) // "<unknown>");
93 sysopen my $fh, $LKFILE, O_CREAT | O_WRONLY;
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': $!";
110 ###--------------------------------------------------------------------------
111 ### DisOrder utilities.
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") { $st{pause} = 1; }
132 sub configured_connection (;$) {
134 $CONF //= load_config $C{config};
135 return connect_to_server %$CONF, $quietp // 0;
139 my $sk = configured_connection;
140 send_command0 $sk, "log";
141 my $st = get_state0 $sk;
146 sub decode_track_name ($\%) {
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";
156 sub fmt_duration ($) {
158 return sprintf "%d:%02d", int $n/60, $n%60;
161 sub get_now_playing ($) {
163 my $r = send_command $sk, "playing";
164 defined $r or return {};
165 my %info = split_fields $r;
166 decode_track_name $sk, %info;
167 exists $info{sofar} and
168 $info{length} = send_command $sk, "length", $info{track};
172 sub format_now_playing (;\%) {
174 unless (defined $info) {
175 my $sk = configured_connection;
176 $info = get_now_playing $sk;
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 $info->{submitter};
189 sub watch_and_notify0 ($) {
190 my ($now_playing) = @_;
192 my $sk = configured_connection 1;
193 my $sk_log = configured_connection 1;
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;
206 fcntl $sk_log, F_SETFL, (fcntl $sk_log, F_GETFL, 0) | O_NONBLOCK;
209 my $rdin = ""; vec($rdin, (fileno $sk_log), 1) = 1;
213 for my $line (@lines) {
214 my @f = split_fields $line;
215 if ($f[1] eq "state") {
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; $msg = "Playing"; }
229 notify "$TITLE state", $msg if defined $msg;
230 } elsif ($f[1] eq "playing") {
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") {
238 $info{track} = $f[2];
239 decode_track_name $sk, %info;
240 notify "$TITLE: Scratched by $f[3]", format_now_playing %info;
244 if (!$sk_log) { $loss = "EOF from server"; last WATCH; }
245 my $nfd = select my $rdout = $rdin, undef, undef, 60;
247 eval { print $sk_log "."; flush $sk_log; };
248 if ($@) { $loss = "error from write: " . $@->errno; last WATCH; }
253 eval { $n = sysread $sk_log, $b, 4096; };
254 if ($@ && $@->errno == EAGAIN) { last READ; }
255 elsif ($@) { $loss = "error from read: " . $@->errno; last WATCH; }
256 elsif (!$n) { close $sk_log; $sk_log = undef; last READ; }
257 else { $buffer .= $b; }
260 @lines = split /\n/, $buffer, -1;
261 $buffer = pop @lines;
265 notify "$TITLE state", "Lost connection: $loss";
268 close $sk_log if defined $sk_log;
271 sub watch_and_notify ($) {
272 my ($now_playing) = @_;
274 claim_lock or exit 1;
277 eval { watch_and_notify0 $now_playing; };
283 ###--------------------------------------------------------------------------
284 ### User-facing operations.
289 sub { run_discard_output "amixer", "sset", $C{mixer}, "5\%+"; };
291 sub { run_discard_output "amixer", "sset", $C{mixer}, "5\%-"; };
293 $OP{"scratch"} = sub {
294 my $sk = configured_connection;
295 send_command $sk, "scratch";
299 $OP{"enable/disable"} = sub {
301 my $sk = configured_connection;
302 if ($st->{play}) { send_command $sk, "disable"; }
303 else { send_command $sk, "enable"; }
307 $OP{"play/pause"} = sub {
309 my $sk = configured_connection;
311 send_command $sk, "enable";
312 if ($st->{pause}) { send_command $sk, "resume"; }
314 if ($st->{pause}) { send_command $sk, "resume"; }
315 else { send_command $sk, "pause"; }
321 if (defined (my $lkpid = locked_by)) {
322 print STDERR "$0: already watched by pid $lkpid\n";
328 $OP{"now-playing"} = sub {
329 my $sk = configured_connection;
330 my $info = get_now_playing $sk;
332 print format_now_playing %$info;
336 $OP{"notify-now-playing"} = sub {
337 my $sk = configured_connection;
338 my $info = get_now_playing $sk;
340 notify "$TITLE: Now playing", format_now_playing %$info;
341 unless (defined locked_by) {
347 $OP{"next-config"} = sub {
348 (my $dir = $C{config}) =~ s:/[^/]*$::;
349 my (@conf, $curr, $conf, $min);
351 if (-l $C{config} && (my $t = readlink $C{config}) =~ /^passwd\.(.*)$/)
354 opendir my $dh, +$dir;
355 FILE: while (my $f = readdir $dh)
356 { push @conf, $1 if $f =~ /^passwd\.(.*[^~])$/; }
358 for (my $i = 0; $i < @conf; $i++) {
359 $min = $conf[$i] if (!defined $min) || $conf[$i] lt $min;
361 if ((!defined $curr) || $curr lt $conf[$i]) &&
362 ((!defined $conf) || $conf[$i] lt $conf);
364 $conf = $min unless defined $conf;
366 try_unlink "$dir/passwd.new";
367 symlink "passwd.$conf", "$dir/passwd.new";
368 rename "$dir/passwd.new", "$dir/passwd";
369 notify "DisOrder configuration", "Switched to `$conf'";
372 ###--------------------------------------------------------------------------
377 print $fh "usage: $PROG [-u CONFIG] COMMAND\n";
384 Command-line options:
385 -h, --help Show this help text
386 -u, --user-config Set user configuration file
403 "h|help" => sub { help; exit 0; },
404 "u|user-config=s" => \$C{config}
406 @ARGV == 1 or $bad = 1;
407 if ($bad) { usage *STDERR; exit 2; }
409 if (!exists $OP{$op}) { print STDERR "$0: unknown op `$op'\n"; exit 2; }
412 ###----- That's all, folks --------------------------------------------------