libfdisk: add Yes/No to Ask API

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

fdisks/fdisk-ask.c

@@ -168,6 +168,7 @@ int ask_callback(struct fdisk_context *cxt, struct fdisk_ask *ask,
 		    void *data __attribute__((__unused__)))
 {
 	va_list ap;
+	int rc = 0;
 	char buf[BUFSIZ];
 
 	assert(cxt);
@@ -197,9 +198,17 @@ int ask_callback(struct fdisk_context *cxt, struct fdisk_ask *ask,
 		fprintf(stderr, ": %m\n");
 		va_end(ap);
 		break;
+	case FDISK_ASKTYPE_YESNO:
+		fputc('\n', stdout);
+		fputs(fdisk_ask_get_query(ask), stdout);
+		rc = get_user_reply(cxt, _(" [Y]es/[N]o: "), buf, sizeof(buf));
+		if (rc == 0)
+			ask->data.yesno.result = rpmatch(buf);
+		DBG(ASK, dbgprint("yes-no ask: reply '%s' [rc=%d]", buf, rc));
+		break;
 	default:
 		warnx(_("internal error: unssuported dialog type %d"), fdisk_ask_get_type(ask));
 		return -EINVAL;
 	}
-	return 0;
+	return rc;
 }

libfdisk/src/ask.c

@@ -357,6 +357,47 @@ int fdisk_ask_number(struct fdisk_context *cxt,
 	return rc;
 }
 
+int fdisk_ask_yesno(struct fdisk_context *cxt,
+		     const char *query,
+		     int *result)
+{
+	struct fdisk_ask *ask;
+	int rc;
+
+	assert(cxt);
+
+	ask = fdisk_new_ask();
+	if (!ask)
+		return -ENOMEM;
+
+	rc = fdisk_ask_set_type(ask, FDISK_ASKTYPE_YESNO);
+	if (!rc)
+		fdisk_ask_set_query(ask, query);
+	if (!rc)
+		rc = fdisk_do_ask(cxt, ask);
+	if (!rc)
+		*result = fdisk_ask_yesno_get_result(ask);
+
+	fdisk_free_ask(ask);
+	DBG(ASK, dbgprint("result: %d [rc=%d]\n", *result, rc));
+	return rc;
+}
+
+uint64_t fdisk_ask_yesno_get_result(struct fdisk_ask *ask)
+{
+	assert(ask);
+	assert(fdisk_is_ask(ask, YESNO));
+	return ask->data.yesno.result;
+}
+
+int fdisk_ask_yesno_set_result(struct fdisk_ask *ask, uint64_t result)
+{
+	assert(ask);
+	ask->data.yesno.result = result;
+	return 0;
+}
+
+
 #define is_print_ask(a) (fdisk_is_ask(a, WARN) || fdisk_is_ask(a, WARNX) || fdisk_is_ask(a, INFO))
 
 int fdisk_ask_print_get_errno(struct fdisk_ask *ask)

libfdisk/src/fdiskP.h

@@ -234,6 +234,10 @@ struct fdisk_ask {
 			unsigned int	has_va:1;
 			int		errnum;		/* errno */
 		} print;
+		/* FDISK_ASKTYPE_YESNO */
+		struct ask_yesno {
+			int		result;		/* TRUE or FALSE */
+		} yesno;
 	} data;
 };
 

libfdisk/src/libfdisk.h

@@ -58,7 +58,8 @@ enum {
 	FDISK_ASKTYPE_OFFSET,
 	FDISK_ASKTYPE_WARN,
 	FDISK_ASKTYPE_WARNX,
-	FDISK_ASKTYPE_INFO
+	FDISK_ASKTYPE_INFO,
+	FDISK_ASKTYPE_YESNO
 };
 
 /* init.c */
@@ -159,6 +160,10 @@ extern int fdisk_ask_number(struct fdisk_context *cxt,
 		     const char *query,
 		     uintmax_t *result);
 
+extern int fdisk_ask_yesno(struct fdisk_context *cxt, const char *query, int *result);
+extern uint64_t fdisk_ask_yesno_get_result(struct fdisk_ask *ask);
+extern int fdisk_ask_yesno_set_result(struct fdisk_ask *ask, uint64_t result);
+
 extern int fdisk_info(struct fdisk_context *cxt, const char *fmt, ...);
 extern int fdisk_warnx(struct fdisk_context *cxt, const char *fmt, ...);
 extern int fdisk_warn(struct fdisk_context *cxt, const char *fmt, ...);