fdisk: use new menu infrastructure to verify keys

- use generic function to ask for key
 - verify the key against the current menu
 - call menu callback if defined

Signed-off-by: Karel Zak <kzak@redhat.com>

fdisks/fdisk-ask.c

@@ -12,7 +12,7 @@
 
 #include "fdisk.h"
 
-static int get_user_reply(struct fdisk_context *cxt, char *prompt,
+int get_user_reply(struct fdisk_context *cxt, const char *prompt,
 			  char *buf, size_t bufsz)
 {
 	char *p;
@@ -24,7 +24,7 @@ static int get_user_reply(struct fdisk_context *cxt, char *prompt,
 
 		if (!fgets(buf, bufsz, stdin)) {
 			if (fdisk_label_is_changed(cxt->label)) {
-				fprintf(stderr, _("Do you really want to quit? "));
+				fprintf(stderr, _("\nDo you really want to quit? "));
 
 				if (fgets(buf, bufsz, stdin) && !rpmatch(buf))
 					continue;

fdisks/fdisk-menu.c

@@ -25,7 +25,9 @@ struct menu {
 	enum fdisk_labeltype	label;		/* only for this label */
 	enum fdisk_labeltype	exclude;	/* all labels except this */
 
-	int (*callback)(struct fdisk_context *, struct menu *, int);
+	int (*callback)(struct fdisk_context *,
+			const struct menu *,
+			const struct menu_entry *);
 
 	struct menu_entry	entries[];	/* NULL terminated array */
 };
@@ -301,6 +303,55 @@ int print_fdisk_menu(struct fdisk_context *cxt)
 	return 0;
 }
 
+/* Asks for command, verify the key and perform the command or
+ * returns the command key if no callback for the command is
+ * implemented.
+ *
+ * Returns: <0 on error
+ *           0 on success (the command performed)
+ *          >0 if no callback (then returns the key)
+ */
+int process_fdisk_menu(struct fdisk_context *cxt)
+{
+	const struct menu_entry *ent;
+	const struct menu *menu;
+	int key, rc;
+	const char *prompt;
+	char buf[BUFSIZ];
+
+	if (fdisk_context_display_details(cxt))
+		prompt = _("Expert command (m for help): ");
+	else
+		prompt = _("Command (m for help): ");
+
+	fputc('\n',stdout);
+	rc = get_user_reply(cxt, prompt, buf, sizeof(buf));
+	if (rc)
+		return rc;
+
+	key = buf[0];
+	ent = get_fdisk_menu_entry(cxt, key, &menu);
+	if (!ent) {
+		fdisk_warnx(cxt, _("%c: unknown command"), key);
+		return -EINVAL;
+	}
+
+	DBG(CONTEXT, dbgprint("selected: key=%c, entry='%s'",
+				key, ent->title));
+	/* hardcoded help */
+	if (key == 'm') {
+		print_fdisk_menu(cxt);
+		return 0;
+
+	/* menu has implemented callback, use it */
+	} else if (menu->callback)
+		return menu->callback(cxt, menu, ent);
+
+	/* no callback, return the key */
+	return key;
+}
+
+
 #ifdef TEST_PROGRAM
 struct fdisk_label *fdisk_new_dos_label(struct fdisk_context *cxt) { return NULL; }
 struct fdisk_label *fdisk_new_bsd_label(struct fdisk_context *cxt) { return NULL; }

fdisks/fdisk.c

@@ -731,8 +731,13 @@ expert_command_prompt(struct fdisk_context *cxt)
 	while(1) {
 		assert(cxt->label);
 
-		putchar('\n');
-		c = read_char(cxt, _("Expert command (m for help): "));
+		c = process_fdisk_menu(cxt);
+		if (c <= 0)
+			continue;
+
+		/* well, process_fdisk_menu() returns commands that
+		 * are not yet implemented by menu callbacks. Let's
+		 * perform the commands here */
 		switch (c) {
 		case 'a':
 			if (fdisk_is_disklabel(cxt, SUN))
@@ -829,9 +834,6 @@ expert_command_prompt(struct fdisk_context *cxt)
 			if (fdisk_is_disklabel(cxt, SUN))
 				fdisk_sun_set_pcylcount(cxt);
 			break;
-		default:
-			print_fdisk_menu(cxt);
-			break;
 		}
 	}
 }
@@ -938,11 +940,15 @@ static void command_prompt(struct fdisk_context *cxt)
 	}
 
 	while (1) {
-
 		assert(cxt->label);
 
-		putchar('\n');
-		c = read_char(cxt, _("Command (m for help): "));
+		c = process_fdisk_menu(cxt);
+		if (c <= 0)
+			continue;
+
+		/* well, process_fdisk_menu() returns commands that
+		 * are not yet implemented by menu callbacks. Let's
+		 * perform the commands here */
 		switch (c) {
 		case 'a':
 			if (fdisk_is_disklabel(cxt, DOS) &&
@@ -1005,9 +1011,6 @@ static void command_prompt(struct fdisk_context *cxt)
 		case 'l':
 			list_partition_types(cxt);
 			break;
-		case 'm':
-			print_fdisk_menu(cxt);
-			break;
 		case 'n':
 			new_partition(cxt);
 			break;
@@ -1039,7 +1042,6 @@ static void command_prompt(struct fdisk_context *cxt)
 			break;
 		default:
 			unknown_command(c);
-			print_fdisk_menu(cxt);
 		}
 	}
 }

fdisks/fdisk.h

@@ -67,7 +67,11 @@ enum failure {
 };
 
 
+extern int get_user_reply(struct fdisk_context *cxt,
+			  const char *prompt,
+			  char *buf, size_t bufsz);
 extern int print_fdisk_menu(struct fdisk_context *cxt);
+extern int process_fdisk_menu(struct fdisk_context *cxt);
 
 extern int ask_callback(struct fdisk_context *cxt, struct fdisk_ask *ask,
 		    void *data __attribute__((__unused__)));