Add option -m to disable active metadata updates

Requested by cmodyssey via ticket #1620:
"Allow ezstream to stop it sending metadata information by configuration"

doc/ezstream-file.sh.1.in.in

@@ -23,7 +23,7 @@
 .Sh SYNOPSIS
 .Nm
 .Bk -words
-.Op Fl hnqVv
+.Op Fl hmnqVv
 .Op Fl T Ar cfg_template
 .Op Ar
 .Ek
@@ -62,6 +62,12 @@ binary.
 .It Fl h
 Print a summary of available command line parameters with short descriptions
 and exit.
+.It Fl m
+.Po
+Passed to
+.Nm ezstream .
+.Pc
+Disable all metadata updates and keep existing metadata in streams untouched.
 .It Fl n
 .Po
 Passed to

doc/ezstream.1.in.in

@@ -24,7 +24,7 @@
 .Sh SYNOPSIS
 .Nm
 .Bk -words
-.Op Fl hnqVv
+.Op Fl hmnqVv
 .Fl c Ar configfile
 .Ek
 .Nm
@@ -52,6 +52,8 @@ Use the XML configuration in
 .It Fl h
 Print a summary of available command line parameters with short descriptions
 and exit.
+.It Fl m
+Disable all metadata updates and keep existing metadata in streams untouched.
 .It Fl n
 Normalize metadata strings by removing excess whitespaces.
 .It Fl q

src/ezstream-file.sh.in

@@ -21,10 +21,10 @@
 _myname="$(basename $0)"
 _filename_placeholder="%FILENAME%"
 
-_opt_string="hnqT:Vv"
+_opt_string="hmnqT:Vv"
 print_usage()
 {
-	echo "usage: ${_myname} [-hnqVv] [-T cfg_template] [file ...]" >&2
+	echo "usage: ${_myname} [-hmnqVv] [-T cfg_template] [file ...]" >&2
 }
 
 print_usage_help()
@@ -32,6 +32,7 @@ print_usage_help()
 	cat << __EOT >&2
 
   -h           print this help and exit
+  -m           [ezstream] disable metadata updates
   -n           [ezstream] normalize metadata strings
   -q           [ezstream] suppress STDERR output from external en-/decoders
   -T template  run ezstream using template for configuration
@@ -45,6 +46,7 @@ See the ezstream-file.sh(1) manual for detailed information.
 __EOT
 }
 
+_metadisable=""
 _normalize=""
 _quiet=""
 _verbose=""
@@ -64,6 +66,8 @@ do
 		print_usage_help
 		exit 0
 		;;
+	-m)
+		_metadisable="-m"; shift ;;
 	-n)
 		_normalize="-n"; shift ;;
 	-q)
@@ -140,6 +144,6 @@ else
 	done
 fi
 
-${EZSTREAM} ${_normalize} ${_quiet} ${_verbose} -c "${_cfg}"
+${EZSTREAM} ${_metadisable} ${_normalize} ${_quiet} ${_verbose} -c "${_cfg}"
 
 exit $?

src/ezstream.c

@@ -50,6 +50,7 @@ char			*__progname;
 #endif /* HAVE___PROGNAME */
 
 int			 nFlag;
+int			 mFlag;
 int			 qFlag;
 int			 sFlag;
 int			 vFlag;
@@ -477,6 +478,9 @@ setMetadata(shout_t *shout, metadata_t *mdata, char **mdata_copy)
 		abort();
 	}
 
+	if (mFlag)
+		return (SHOUTERR_SUCCESS);
+
 	if (mdata == NULL)
 		return 1;
 
@@ -948,6 +952,8 @@ streamFile(shout_t *shout, const char *fileName)
 			}
 			if (ret == STREAM_UPDMDATA || queryMetadata) {
 				queryMetadata = 0;
+				if (mFlag)
+					continue;
 				if (metadataFromProgram) {
 					char		*mdataStr = NULL;
 					metadata_t	*prog_mdata;
@@ -1086,7 +1092,7 @@ ez_shutdown(int exitval)
 void
 usage(void)
 {
-	printf("usage: %s [-hnqVv] -c configfile\n", __progname);
+	printf("usage: %s [-hmnqVv] -c configfile\n", __progname);
 	printf("       %s -s [playlist]\n", __progname);
 }
 
@@ -1096,6 +1102,7 @@ usageHelp(void)
 	printf("\n");
 	printf("  -c configfile  use XML configuration in configfile (mandatory)\n");
 	printf("  -h             display this additional help and exit\n");
+	printf("  -m             disable metadata updates\n");
 	printf("  -n             normalize metadata strings\n");
 	printf("  -q             suppress STDERR output from external en-/decoders\n");
 	printf("  -s [playlist]  read lines from playlist (or STDIN), shuffle and print them to\n");
@@ -1133,11 +1140,12 @@ main(int argc, char *argv[])
 	__progname = getProgname(argv[0]);
 	pezConfig = getEZConfig();
 
+	mFlag = 0;
 	nFlag = 0;
 	qFlag = 0;
 	vFlag = 0;
 
-	while ((c = local_getopt(argc, argv, "c:hnqsVv")) != -1) {
+	while ((c = local_getopt(argc, argv, "c:hmnqsVv")) != -1) {
 		switch (c) {
 		case 'c':
 			if (configFile != NULL) {
@@ -1151,6 +1159,9 @@ main(int argc, char *argv[])
 			usage();
 			usageHelp();
 			return (ez_shutdown(0));
+		case 'm':
+			mFlag = 1;
+			break;
 		case 'n':
 			nFlag = 1;
 			break;