Option -S: start in disk usage analyzer mode

README.md

@@ -162,11 +162,12 @@ Add the following to your shell's rc file for the best experience:
 
 ### Usage
 
-Start nnn (default: current directory):
+Start nnn (default dir: current directory):
 
-    $ nnn [-d] [-v] [path_to_dir]
+    $ nnn [-d] [-S] [-v] [dir]
 
-    -d: open in detail view mode
+    -d: start in detail view mode
+    -S: start in disk usage analyzer mode
     -v: show version and exit
 `>` indicates the currently selected entry in nnn.
 

nnn.1

@@ -85,7 +85,10 @@ directory you came out of.
 supports the following options:
 .Pp
 .Fl d
-        open in detail view mode
+        start in detail view mode
+.Pp
+.Fl S
+        start in disk usage analyzer mode
 .Pp
 .Fl v
         show version and exit

nnn.c

@@ -1578,7 +1578,7 @@ nochange:
 static void
 usage(void)
 {
-	fprintf(stderr, "usage: nnn [-d] [-v] [dir]\n");
+	fprintf(stderr, "usage: nnn [-d] [-S] [-v] [dir]\n");
 	exit(1);
 }
 
@@ -1598,8 +1598,10 @@ main(int argc, char *argv[])
 	if (argc > 3)
 		usage();
 
-	while ((opt = getopt(argc, argv, "dv")) != -1) {
+	while ((opt = getopt(argc, argv, "dSv")) != -1) {
 		switch (opt) {
+		case 'S':
+			bsizeorder = 1;
 		case 'd':
 			/* Open in detail mode, if set */
 			showdetail = 1;