searching for parameters in 'make menuconfig'

diff -Nru a/scripts/kconfig/mconf.c b/scripts/kconfig/mconf.c
@@ -28,7 +28,7 @@
 	"<Enter> selects submenus --->.  "
 	"Highlighted letters are hotkeys.  "
 	"Pressing <Y> includes, <N> excludes, <M> modularizes features.  "
-	"Press <Esc><Esc> to exit, <?> for Help.  "
+	"Press <Esc><Esc> to exit, <?> for Help, </> for Search.  "
 	"Legend: [*] built-in  [ ] excluded  <M> module  < > module capable",
 radiolist_instructions[] =
 	"Use the arrow keys to navigate this window or "

@@ -102,6 +102,7 @@
 static void show_helptext(const char *title, const char *text);
 static void show_help(struct menu *menu);
 static void show_readme(void);
+static void search_conf(char *);
 
 static void cprint_init(void);
 static int cprint1(const char *fmt, ...);

@@ -274,6 +275,84 @@
 	return WEXITSTATUS(stat);
 }
 
+static struct menu *do_search(struct menu *menu, struct symbol *sym)
+{
+	struct menu *child, *ret;
+	/* Ignore invisible menus ?
+	if (!menu_is_visible(menu))
+		return NULL;
+	*/
+
+	if ( menu->sym ) {
+		if ( menu->sym->name && !strcmp(menu->sym->name, sym->name )) {
+			return menu;
+		}
+	}
+	for (child = menu->list; child; child = child->next) {
+		ret = do_search(child, sym);
+		if ( ret ) return ret;
+	}
+	return NULL;
+}
+
+static void search_conf(char *search_str)
+{
+    struct symbol *sym;
+	struct menu *menu[32] = { 0 };
+	int i, j, k;
+	FILE *fp;
+	bool hit = false;
+
+	fp = fopen(".search.tmp", "w");
+	if ( fp == NULL ) {
+		perror("fopen");
+		return;
+	}
+	for_all_symbols(i, sym) {
+		if ( sym->name && strstr(sym->name, search_str) ) {
+			struct menu *submenu = do_search(&rootmenu, sym);
+			j = 0;
+			while ( submenu ) {
+				menu[j++] = submenu;
+				submenu = submenu->parent;
+			}
+			if ( j > 0 ) {
+				if ( sym->prop && sym->prop->text ) {
+					fprintf(fp, "%s (%s)\n", sym->prop->text, sym->name);
+				} else {
+					fprintf(fp, "%s\n", sym->name);
+				}
+			}
+			for (k = j-2; k > 0; k-- ) {
+				if ( ! hit ) hit = true;
+				submenu = menu[k];
+				const char *prompt = menu_get_prompt(submenu);
+				if ( submenu->sym ) {
+					fprintf(fp, " -> %s (%s)\n", prompt, submenu->sym->name);
+				} else {
+					fprintf(fp, " -> %s\n", prompt);
+				}
+			}
+			if ( hit )
+				fprintf(fp, "\n");
+		}
+    }
+	if ( ! hit ) {
+		fprintf(fp, "No matches found.");
+	}
+	fclose(fp);
+    do {
+        cprint_init();
+        cprint("--title");
+        cprint("Search Results");
+        cprint("--textbox");
+        cprint(".search.tmp");
+        cprint("%d", rows);
+        cprint("%d", cols);
+    } while (exec_conf() < 0);
+	unlink(".search.tmp");
+}
+
 static void build_conf(struct menu *menu)
 {
 	struct symbol *sym;

@@ -463,6 +542,23 @@
 			cprint("    Save Configuration to an Alternate File");
 		}
 		stat = exec_conf();
+		if ( stat == 26 ) {
+			if ( ! strlen(input_buf) ) continue;
+			char *search_str = (char*)malloc(sizeof(char)*sizeof(input_buf));
+			if ( search_str == NULL ) {
+				perror("malloc");
+				continue;
+			}
+			/* Capitalizing the string */
+			for ( i = 0; input_buf[i]; i++ ) {
+				search_str[i] = toupper(input_buf[i]);
+			}
+			search_str[i] = '\0';
+			/* Searching and displaying all matches */
+			search_conf( search_str );
+			free(search_str);
+			continue;
+		}
 		if (stat < 0)
 			continue;
 

diff -Nru a/scripts/lxdialog/menubox.c b/scripts/lxdialog/menubox.c
@@ -276,6 +276,16 @@
 
     while (key != ESC) {
 	key = wgetch(menu);
+	if ( key == '/' ) {
+		int ret = dialog_inputbox("Search Configuration Parameter", 
+								  "Enter Keyword", height, width, 
+								  (char *) NULL);
+		if ( ret == 0 )
+		{
+			fprintf(stderr, "%s", dialog_input_result);
+			return 26;
+		}
+	}
 
 	if (key < 256 && isalpha(key)) key = tolower(key);