batch rename: check dep, handle invalid input

plugins/.nmv

@@ -26,6 +26,10 @@ dst_file=$(mktemp "$TMPDIR/.nnnXXXXXX")
 if [ -s "$selection" ]; then
 	printf "Rename 'c'urrent / 's'election? "
 	read -r resp
+
+    if ! [ "$resp" = "c" ] && ! [ "$resp" = "s" ]; then
+        exit 1
+    fi
 fi
 
 if [ "$resp" = "s" ]; then
@@ -96,7 +100,7 @@ while read -r num name; do
 				printf "%s: failed to rename %s to %s: %s\n" "$0" "$name" "$tmp" "$!" > /dev/stderr
 				exit_status=1
 			fi
-			
+
 			for key in "${!items[@]}"; do
 				if [ "${items[$key]}" = "$name" ]; then
 					items[$key]="$tmp"
@@ -116,7 +120,7 @@ while read -r num name; do
 				for key in "${!items[@]}"; do
 					items[$key]=$(printf "%s" "${items[$key]}" | sed "s|^$src\(\$\|\/\)|$name\1|")
 				done
-				
+
 				printf "'%s' => '%s'\n" "$src" "$name"
 			else
 				printf "'%s' -> '%s'\n" "$src" "$name"

src/nnn.c

@@ -431,7 +431,8 @@ static uchar g_states;
 #define UTIL_FZY 16
 #define UTIL_NTFY 17
 #define UTIL_CBCP 18
-#define UTIL_NMV 19
+#define UTIL_BASH 19
+#define UTIL_NMV 20
 
 /* Utilities to open files, run actions */
 static char * const utils[] = {
@@ -470,6 +471,7 @@ static char * const utils[] = {
 	"fzy",
 	".ntfy",
 	".cbcp",
+	"bash",
 	".nmv",
 };
 
@@ -5610,7 +5612,8 @@ nochange:
 			case SEL_RENAMEMUL:
 				endselection();
 
-				if (!plugscript(utils[UTIL_NMV], newpath, path, F_CLI)
+				if (!(getutil(utils[UTIL_BASH])
+				      && plugscript(utils[UTIL_NMV], newpath, path, F_CLI))
 				    && !batch_rename(path)) {
 					printwait(messages[MSG_FAILED], &presel);
 					goto nochange;