From 2147e161bf7936f5c812266f9922e7d6721e9c71 Mon Sep 17 00:00:00 2001
From: Benno Schulenberg <bensberg@telfort.nl>
Date: Mon, 6 Aug 2018 21:29:01 +0200
Subject: [PATCH] rcfile: when a vital function is not mapped, mention in which
 menu

Add the reverse of the name-to-menu function to accomplish this.

This fixes https://savannah.gnu.org/bugs/?54449.
---
 src/global.c | 12 ++++++++++++
 src/proto.h  |  1 +
 src/rcfile.c |  3 ++-
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/global.c b/src/global.c
index 25b5b4da..136058e0 100644
--- a/src/global.c
+++ b/src/global.c
@@ -1710,6 +1710,18 @@ int strtomenu(const char *input)
 
 	return -1;
 }
+
+/* Return the name that corresponds to the given menu symbol. */
+char *menu_to_name(int menu)
+{
+	int index = -1;
+
+	while (++index < NUMBER_OF_MENUS)
+		if (menusymbols[index] == menu)
+			return menunames[index];
+
+	return "boooo";
+}
 #endif /* ENABLE_NANORC */
 
 
diff --git a/src/proto.h b/src/proto.h
index 46794fff..725543ab 100644
--- a/src/proto.h
+++ b/src/proto.h
@@ -330,6 +330,7 @@ const subnfunc *sctofunc(const sc *s);
 const char *flagtostr(int flag);
 sc *strtosc(const char *input);
 int strtomenu(const char *input);
+char *menu_to_name(int menu);
 #ifdef DEBUG
 void thanks_for_all_the_fish(void);
 #endif
diff --git a/src/rcfile.c b/src/rcfile.c
index b63a2c45..d9b78a48 100644
--- a/src/rcfile.c
+++ b/src/rcfile.c
@@ -882,7 +882,8 @@ static void check_vitals_mapped(void)
 				const sc *s = first_sc_for(inmenus[v], f->func);
 				if (!s) {
 					fprintf(stderr, _("No key is bound to function '%s' in "
-										"some menu.  Exiting.\n"), f->desc);
+										"menu '%s'.  Exiting.\n"), f->desc,
+										menu_to_name(inmenus[v]));
 					fprintf(stderr, _("If needed, use nano with the -I option "
 										"to adjust your nanorc settings.\n"));
 					exit(1);