MPD script updates.

[fvwmconf.git] / scripts / mpdexec.pl

diff --git a/scripts/mpdexec.pl b/scripts/mpdexec.pl
index 9c6e0693d765b0d6015a5631db825cdbe9a566cb..962656f2c957aa6920ed12cda42653f82a390927 100755 (executable)
--- a/scripts/mpdexec.pl
+++ b/scripts/mpdexec.pl
@@ -1,9 +1,10 @@
 #!/usr/bin/env perl
 #
-# Copyright © 2012 Nick Bowler
+# Copyright © 2012,2019 Nick Bowler
 #
-# Simple program to send a command to MPD.  The result is printed to standard
-# output.
+# Simple program to send a command to MPD.  Each command-line argument is
+# quoted as necessary so it appears as a single argument at the protocol
+# level.  The result is printed to standard output.
 #
 # License WTFPL2: Do What The Fuck You Want To Public License, version 2.
 # This is free software: you are free to do what the fuck you want to.
@@ -12,7 +13,12 @@
 use strict;
 
 use utf8;
-use encoding 'utf8';
+
+use Encode::Locale qw(decode_argv);
+decode_argv(Encode::FB_CROAK);
+
+binmode(STDOUT, ":utf8");
+binmode(STDIN, ":utf8");
 use IO::Socket::INET6;
 
 my $host = $ENV{MPD_HOST} // "localhost";
@@ -29,11 +35,37 @@ if (!(<$sock> =~ /^OK MPD ([0-9]+)\.([0-9]+)\.([0-9]+)$/)) {
        die "MPD failed to announce version: $!";
 }
 
-print $sock join(' ', @ARGV), "\n";
-while (<$sock>) {
-       last if (/^OK/);
-       print;
-       exit 1 if (/^ACK/);
+sub mpd_escape {
+       ($_) = @_;
+
+       # No way to encode literal newlines in the protocol, so we convert
+       # any newlines in the arguments into a space, which can help with
+       # shell quoting.
+       s/\n/ /g;
+
+       if (/[ \t\\"]/) {
+               s/[\\"]/\\$&/g;
+               return "\"$_\"";
+       }
+       return $_;
+}
+
+sub mpd_exec {
+       print $sock join(' ', @_), "\n";
+       while (<$sock>) {
+               last if (/^OK/);
+               print;
+               exit 1 if (/^ACK/);
+       }
+}
+
+if (@ARGV) {
+       mpd_exec(map { mpd_escape($_) } @ARGV)
+} else {
+       while (<>) {
+               chomp;
+               mpd_exec($_);
+       }
 }
 
 print $sock "close\n";