[xmp] Add --probe-only option

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>

src/common.h

@@ -11,6 +11,7 @@ struct options {
 	int verbose;
 	int silent;		/* silent output */
 	int info;		/* display information and exit */
+	int probeonly;		/* probe sound driver and exit */
 	char *drv_id;		/* sound driver ID */
 	char *out_file;		/* output file name */
 	char *ins_path;		/* instrument path */

src/main.c

@@ -156,7 +156,7 @@ int main(int argc, char **argv)
 
 	get_options(argc, argv, &options);
 
-	if (optind >= argc) {
+	if (!options.probeonly && optind >= argc) {
 		fprintf (stderr, "%s: no modules to play\n"
 			"Use `%s --help' for more information.\n",
 			argv[0], argv[0]);
@@ -185,6 +185,9 @@ int main(int argc, char **argv)
 			options.format & XMP_FORMAT_8BIT ? 8 : 16,
 			options.format & XMP_FORMAT_MONO ? "mono" : "stereo");
 
+	if (options.probeonly) {
+		exit(EXIT_SUCCESS);
+	}
 
 	if (options.random) {
 		shuffle(argc - optind + 1, &argv[optind - 1]);

src/options.c

@@ -22,9 +22,6 @@ extern char *optarg;
 static int o, i;
 static char *token;
 
-extern int probeonly;
-extern int randomize;
-extern int nocmd;
 #ifdef HAVE_SYS_RTPRIO_H
 extern int rt;
 #endif
@@ -132,6 +129,7 @@ static struct option lopt[] = {
 	{ "mute",		1, 0, 'M' },
 	{ "output-file",	1, 0, 'o' },
 	{ "pan",		1, 0, 'P' },
+	{ "probe-only",		0, 0, OPT_PROBEONLY },
 	{ "quiet",		0, 0, 'q' },
 	{ "random",		0, 0, 'R' },
 	{ "solo",		1, 0, 'S' },
@@ -218,6 +216,9 @@ void get_options(int argc, char **argv, struct options *options)
 			if (options->mix > 100)
 				options->mix = 100;
 			break;
+		case OPT_PROBEONLY:
+			options->probeonly = 1;
+			break;
 		case 'q':
 			//options->verbosity = 0;
 			break;