1 files changed, 1044 insertions, 0 deletions

diff --git a/libblkid/libfdisk/src/ask.c b/libblkid/libfdisk/src/ask.c
new file mode 100644
index 000000000..7e0c3c218
--- /dev/null
+++ b/libblkid/libfdisk/src/ask.c
@@ -0,0 +1,1044 @@
+
+#include "strutils.h"
+#include "fdiskP.h"
+
+/**
+ * SECTION: ask
+ * @title: Ask
+ * @short_description: interface for dialog driven partitioning, warning and info messages
+ *
+ */
+
+static void fdisk_ask_menu_reset_items(struct fdisk_ask *ask);
+
+
+/**
+ * fdisk_set_ask:
+ * @cxt: context
+ * @ask_cb: callback
+ * @data: callback data
+ *
+ * Set callback for dialog driven partitioning and library warnings/errors.
+ *
+ * Returns: 0 on success, < 0 on error.
+ */
+int fdisk_set_ask(struct fdisk_context *cxt,
+		int (*ask_cb)(struct fdisk_context *, struct fdisk_ask *, void *),
+		void *data)
+{
+	assert(cxt);
+
+	cxt->ask_cb = ask_cb;
+	cxt->ask_data = data;
+	return 0;
+}
+
+struct fdisk_ask *fdisk_new_ask(void)
+{
+	struct fdisk_ask *ask = calloc(1, sizeof(struct fdisk_ask));
+	DBG(ASK, ul_debugobj(ask, "alloc"));
+	ask->refcount = 1;
+	return ask;
+}
+
+void fdisk_reset_ask(struct fdisk_ask *ask)
+{
+	int refcount;
+
+	assert(ask);
+	free(ask->query);
+
+	DBG(ASK, ul_debugobj(ask, "reset"));
+	refcount = ask->refcount;
+
+	if (fdisk_is_ask(ask, MENU))
+		fdisk_ask_menu_reset_items(ask);
+
+	memset(ask, 0, sizeof(*ask));
+	ask->refcount = refcount;
+}
+
+/**
+ * fdisk_ref_ask:
+ * @ask: ask instance
+ *
+ * Incremparts reference counter.
+ */
+void fdisk_ref_ask(struct fdisk_ask *ask)
+{
+	if (ask)
+		ask->refcount++;
+}
+
+
+/**
+ * fdisk_unref_ask:
+ * @ask: ask instance
+ *
+ * De-incremparts reference counter, on zero the @ask is automatically
+ * deallocated.
+ */
+void fdisk_unref_ask(struct fdisk_ask *ask)
+{
+	if (!ask)
+		return;
+	ask->refcount--;
+
+	if (ask->refcount <= 0) {
+		fdisk_reset_ask(ask);
+		DBG(ASK, ul_debugobj(ask, "free"));
+		free(ask);
+	}
+}
+
+/**
+ * fdisk_ask_get_query:
+ * @ask: ask instance
+ *
+ * Returns: pointer to dialog string.
+ */
+const char *fdisk_ask_get_query(struct fdisk_ask *ask)
+{
+	assert(ask);
+	return ask->query;
+}
+
+int fdisk_ask_set_query(struct fdisk_ask *ask, const char *str)
+{
+	assert(ask);
+	return !strdup_to_struct_member(ask, query, str) ? -ENOMEM : 0;
+}
+
+/**
+ * fdisk_ask_get_type:
+ * @ask: ask instance
+ *
+ * Returns: FDISK_ASKTYPE_*
+ */
+int fdisk_ask_get_type(struct fdisk_ask *ask)
+{
+	assert(ask);
+	return ask->type;
+}
+
+int fdisk_ask_set_type(struct fdisk_ask *ask, int type)
+{
+	assert(ask);
+	ask->type = type;
+	return 0;
+}
+
+int fdisk_do_ask(struct fdisk_context *cxt, struct fdisk_ask *ask)
+{
+	int rc;
+
+	assert(ask);
+	assert(cxt);
+
+	DBG(ASK, ul_debugobj(ask, "do_ask for '%s'",
+				ask->query ? ask->query :
+				ask->type == FDISK_ASKTYPE_INFO  ? "info" :
+				ask->type == FDISK_ASKTYPE_WARNX ? "warnx" :
+				ask->type == FDISK_ASKTYPE_WARN  ? "warn" :
+				"?nothing?"));
+
+	if (!cxt->ask_cb) {
+		DBG(ASK, ul_debugobj(ask, "no ask callback specified!"));
+		return -EINVAL;
+	}
+
+	rc = cxt->ask_cb(cxt, ask, cxt->ask_data);
+
+	DBG(ASK, ul_debugobj(ask, "do_ask done [rc=%d]", rc));
+	return rc;
+}
+
+#define is_number_ask(a)  (fdisk_is_ask(a, NUMBER) || fdisk_is_ask(a, OFFSET))
+
+/**
+ * fdisk_ask_number_get_range:
+ * @ask: ask instance
+ *
+ * Returns: string with range (e.g. "1,3,5-10")
+ */
+const char *fdisk_ask_number_get_range(struct fdisk_ask *ask)
+{
+	assert(ask);
+	assert(is_number_ask(ask));
+	return ask->data.num.range;
+}
+
+int fdisk_ask_number_set_range(struct fdisk_ask *ask, const char *range)
+{
+	assert(ask);
+	assert(is_number_ask(ask));
+	ask->data.num.range = range;
+	return 0;
+}
+
+/**
+ * fdisk_ask_number_get_default:
+ * @ask: ask instance
+ *
+ * Returns: default number
+ *
+ */
+uint64_t fdisk_ask_number_get_default(struct fdisk_ask *ask)
+{
+	assert(ask);
+	assert(is_number_ask(ask));
+	return ask->data.num.dfl;
+}
+
+int fdisk_ask_number_set_default(struct fdisk_ask *ask, uint64_t dflt)
+{
+	assert(ask);
+	ask->data.num.dfl = dflt;
+	return 0;
+}
+
+/**
+ * fdisk_ask_number_get_low:
+ * @ask: ask instance
+ *
+ * Returns: minimal possible number when ask for numbers in range
+ */
+uint64_t fdisk_ask_number_get_low(struct fdisk_ask *ask)
+{
+	assert(ask);
+	assert(is_number_ask(ask));
+	return ask->data.num.low;
+}
+
+int fdisk_ask_number_set_low(struct fdisk_ask *ask, uint64_t low)
+{
+	assert(ask);
+	ask->data.num.low = low;
+	return 0;
+}
+
+/**
+ * fdisk_ask_number_get_high:
+ * @ask: ask instance
+ *
+ * Returns: maximal possible number when ask for numbers in range
+ */
+uint64_t fdisk_ask_number_get_high(struct fdisk_ask *ask)
+{
+	assert(ask);
+	assert(is_number_ask(ask));
+	return ask->data.num.hig;
+}
+
+int fdisk_ask_number_set_high(struct fdisk_ask *ask, uint64_t high)
+{
+	assert(ask);
+	ask->data.num.hig = high;
+	return 0;
+}
+
+/**
+ * fdisk_ask_number_get_result:
+ * @ask: ask instance
+ *
+ * Returns: result
+ */
+uint64_t fdisk_ask_number_get_result(struct fdisk_ask *ask)
+{
+	assert(ask);
+	assert(is_number_ask(ask));
+	return ask->data.num.result;
+}
+
+/**
+ * fdisk_ask_number_set_result:
+ * @ask: ask instance
+ * @result: dialog result
+ *
+ * Returns: 0 on success, <0 on error
+ */
+int fdisk_ask_number_set_result(struct fdisk_ask *ask, uint64_t result)
+{
+	assert(ask);
+	ask->data.num.result = result;
+	return 0;
+}
+
+/**
+ * fdisk_ask_number_get_base:
+ * @ask: ask instance
+ *
+ * Returns: base when user specify number in relative notation (+size)
+ */
+uint64_t fdisk_ask_number_get_base(struct fdisk_ask *ask)
+{
+	assert(ask);
+	assert(is_number_ask(ask));
+	return ask->data.num.base;
+}
+
+int fdisk_ask_number_set_base(struct fdisk_ask *ask, uint64_t base)
+{
+	assert(ask);
+	ask->data.num.base = base;
+	return 0;
+}
+
+/**
+ * fdisk_ask_number_get_unit:
+ * @ask: ask instance
+ *
+ * Returns: number of bytes per the unit
+ */
+uint64_t fdisk_ask_number_get_unit(struct fdisk_ask *ask)
+{
+	assert(ask);
+	assert(is_number_ask(ask));
+	return ask->data.num.unit;
+}
+
+int fdisk_ask_number_set_unit(struct fdisk_ask *ask, uint64_t unit)
+{
+	assert(ask);
+	ask->data.num.unit = unit;
+	return 0;
+}
+
+int fdisk_ask_number_is_relative(struct fdisk_ask *ask)
+{
+	assert(ask);
+	assert(is_number_ask(ask));
+	return ask->data.num.relative;
+}
+
+/**
+ * fdisk_ask_number_set_relative
+ * @ask: ask instance
+ * @relative: 0 or 1
+ *
+ * Inform libfdisk that user specified number in relative notation rather than
+ * by explicit number. This info allows to fdisk do some optimization (e.g.
+ * align end of partiton, etc.)
+ *
+ * Returns: 0 on success, <0 on error
+ */
+int fdisk_ask_number_set_relative(struct fdisk_ask *ask, int relative)
+{
+	assert(ask);
+	ask->data.num.relative = relative ? 1 : 0;
+	return 0;
+}
+
+/**
+ * fdisk_ask_number_inchars:
+ * @ask: ask instance
+ *
+ * For example for BSD is normal to address partition by chars rather than by
+ * number (first partition is 'a').
+ *
+ * Returns: 1 if number should be presented as chars
+ *
+ */
+int fdisk_ask_number_inchars(struct fdisk_ask *ask)
+{
+	assert(ask);
+	assert(is_number_ask(ask));
+	return ask->data.num.inchars;
+}
+
+/*
+ * Generates string with list ranges (e.g. 1,2,5-8) for the 'cur'
+ */
+#define tochar(num)	((int) ('a' + num - 1))
+static char *mk_string_list(char *ptr, size_t *len, size_t *begin,
+			    size_t *run, ssize_t cur, int inchar)
+{
+	int rlen;
+
+	if (cur != -1) {
+		if (!*begin) {			/* begin of the list */
+			*begin = cur + 1;
+			return ptr;
+		}
+
+		if (*begin + *run == cur) {	/* no gap, continue */
+			(*run)++;
+			return ptr;
+		}
+	} else if (!*begin) {
+		*ptr = '\0';
+		return ptr;		/* end of empty list */
+	}
+
+					/* add to the list */
+	if (!*run)
+		rlen = inchar ? snprintf(ptr, *len, "%c,", tochar(*begin)) :
+				snprintf(ptr, *len, "%zu,", *begin);
+	else if (*run == 1)
+		rlen = inchar ?
+			snprintf(ptr, *len, "%c,%c,", tochar(*begin), tochar(*begin + 1)) :
+			snprintf(ptr, *len, "%zu,%zu,", *begin, *begin + 1);
+	else
+		rlen = inchar ?
+			snprintf(ptr, *len, "%c-%c,", tochar(*begin), tochar(*begin + *run)) :
+			snprintf(ptr, *len, "%zu-%zu,", *begin, *begin + *run);
+
+	if (rlen < 0 || (size_t) rlen + 1 > *len)
+		return NULL;
+
+	ptr += rlen;
+
+	if (rlen > 0 && *len > (size_t) rlen)
+		*len -= rlen;
+	else
+		*len = 0;
+
+	if (cur == -1 && *begin) {
+		/* end of the list */
+		*(ptr - 1) = '\0';	/* remove tailing ',' from the list */
+		return ptr;
+	}
+
+	*begin = cur + 1;
+	*run = 0;
+
+	return ptr;
+}
+
+/**
+ * fdisk_ask_partnum:
+ * @cxt: context
+ * @partnum: returns partition number
+ * @wantnew: 0|1
+ *
+ * High-level API to ask for used or unused partition number.
+ *
+ * Returns: 0 on success, < 0 on error, 1 if no free/used partition
+ */
+int fdisk_ask_partnum(struct fdisk_context *cxt, size_t *partnum, int wantnew)
+{
+	int rc = 0, inchar = 0;
+	char range[BUFSIZ], *ptr = range;
+	size_t i, len = sizeof(range), begin = 0, run = 0;
+	struct fdisk_ask *ask = NULL;
+	__typeof__(ask->data.num) *num;
+
+	assert(cxt);
+	assert(cxt->label);
+	assert(partnum);
+
+	if (cxt->label && cxt->label->flags & FDISK_LABEL_FL_INCHARS_PARTNO)
+		inchar = 1;
+
+	DBG(ASK, ul_debug("%s: asking for %s partition number "
+			  "(max: %zu, inchar: %s)",
+			cxt->label->name,
+			wantnew ? "new" : "used",
+			cxt->label->nparts_max,
+			inchar ? "yes" : "not"));
+
+	ask = fdisk_new_ask();
+	if (!ask)
+		return -ENOMEM;
+
+	fdisk_ask_set_type(ask, FDISK_ASKTYPE_NUMBER);
+	num = &ask->data.num;
+
+	ask->data.num.inchars = inchar ? 1 : 0;
+
+	for (i = 0; i < cxt->label->nparts_max; i++) {
+		int used = fdisk_is_partition_used(cxt, i);
+
+		if (wantnew && !used) {
+			ptr = mk_string_list(ptr, &len, &begin, &run, i, inchar);
+			if (!ptr) {
+				rc = -EINVAL;
+				break;
+			}
+			if (!num->low)
+				num->dfl = num->low = i + 1;
+			num->hig = i + 1;
+		} else if (!wantnew && used) {
+			ptr = mk_string_list(ptr, &len, &begin, &run, i, inchar);
+			if (!num->low)
+				num->low = i + 1;
+			num->dfl = num->hig = i + 1;
+		}
+	}
+
+	DBG(ASK, ul_debugobj(ask, "ask limits: low: %ju, high: %ju, default: %ju",
+				num->low, num->hig, num->dfl));
+
+	if (!rc && !wantnew && num->low == num->hig) {
+		if (num->low > 0) {
+			/* only one existing partiton, don't ask, return the number */
+			fdisk_ask_number_set_result(ask, num->low);
+			fdisk_info(cxt, _("Selected partition %ju"), num->low);
+
+		} else if (num->low == 0) {
+			fdisk_warnx(cxt, _("No partition is defined yet!"));
+			rc = 1;
+		}
+		goto dont_ask;
+	}
+	if (!rc && wantnew && num->low == num->hig) {
+		if (num->low > 0) {
+			/* only one free partition, don't ask, return the number */
+			fdisk_ask_number_set_result(ask, num->low);
+			fdisk_info(cxt, _("Selected partition %ju"), num->low);
+		}
+		if (num->low == 0) {
+			fdisk_warnx(cxt, _("No free partition available!"));
+			rc = 1;
+		}
+		goto dont_ask;
+	}
+	if (!rc) {
+		mk_string_list(ptr, &len, &begin, &run, -1, inchar);	/* terminate the list */
+		rc = fdisk_ask_number_set_range(ask, range);
+	}
+	if (!rc)
+		rc = fdisk_ask_set_query(ask, _("Partition number"));
+	if (!rc)
+		rc = fdisk_do_ask(cxt, ask);
+
+dont_ask:
+	if (!rc) {
+		*partnum = fdisk_ask_number_get_result(ask);
+		if (*partnum)
+			*partnum -= 1;
+	}
+	DBG(ASK, ul_debugobj(ask, "result: %ju [rc=%d]\n", fdisk_ask_number_get_result(ask), rc));
+	fdisk_unref_ask(ask);
+	return rc;
+}
+
+/**
+ * fdisk_ask_number:
+ * @cxt: context
+ * @low: minimal possible number
+ * @dflt: default suggestion
+ * @high: maximal possible number
+ * @query: question string
+ * @result: returns result
+ *
+ * Returns: 0 on success, <0 on error.
+ */
+int fdisk_ask_number(struct fdisk_context *cxt,
+		     uintmax_t low,
+		     uintmax_t dflt,
+		     uintmax_t high,
+		     const char *query,
+		     uintmax_t *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_NUMBER);
+	if (!rc)
+		fdisk_ask_number_set_low(ask, low);
+	if (!rc)
+		fdisk_ask_number_set_default(ask, dflt);
+	if (!rc)
+		fdisk_ask_number_set_high(ask, high);
+	if (!rc)
+		fdisk_ask_set_query(ask, query);
+	if (!rc)
+		rc = fdisk_do_ask(cxt, ask);
+	if (!rc)
+		*result = fdisk_ask_number_get_result(ask);
+
+	DBG(ASK, ul_debugobj(ask, "result: %ju [rc=%d]\n", *result, rc));
+	fdisk_unref_ask(ask);
+	return rc;
+}
+
+/**
+ * fdisk_ask_string_get_result:
+ * @ask: ask instance
+ *
+ * Returns: pointer to dialog result
+ */
+char *fdisk_ask_string_get_result(struct fdisk_ask *ask)
+{
+	assert(ask);
+	assert(fdisk_is_ask(ask, STRING));
+	return ask->data.str.result;
+}
+
+/**
+ * fdisk_ask_string_set_result:
+ * @ask: ask instance
+ * @result: pointer to allocated buffer with string
+ *
+ * You don't have to care about the @result deallocation, libfdisk is going to
+ * deallocate the result when destroy @ask instance.
+ *
+ * Returns: 0 on success, <0 on error
+ */
+int fdisk_ask_string_set_result(struct fdisk_ask *ask, char *result)
+{
+	assert(ask);
+	ask->data.str.result = result;
+	return 0;
+}
+
+/**
+ * fdisk_ask_string:
+ * @cxt: context:
+ * @query: question string
+ * @result: returns allocated buffer
+ *
+ * High-level API to ask for strings. Don't forget to deallocate the @result.
+ *
+ * Returns: 0 on success, <0 on error.
+ */
+int fdisk_ask_string(struct fdisk_context *cxt,
+		     const char *query,
+		     char **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_STRING);
+	if (!rc)
+		fdisk_ask_set_query(ask, query);
+	if (!rc)
+		rc = fdisk_do_ask(cxt, ask);
+	if (!rc)
+		*result = fdisk_ask_string_get_result(ask);
+
+	DBG(ASK, ul_debugobj(ask, "result: %s [rc=%d]\n", *result, rc));
+	fdisk_unref_ask(ask);
+	return rc;
+}
+
+/**
+ * fdisk_ask_yesno:
+ * @cxt: context
+ * @query: question string
+ * @result: returns 0 (no) or 1 (yes)
+ *
+ * Hight-level API to ask Yes/No questions
+ *
+ * Returns: 0 on success, <0 on error
+ */
+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) == 1 ? 1 : 0;
+
+	DBG(ASK, ul_debugobj(ask, "result: %d [rc=%d]\n", *result, rc));
+	fdisk_unref_ask(ask);
+	return rc;
+}
+
+/**
+ * fdisk_ask_yesno_get_result:
+ * @ask: ask instance
+ *
+ * Returns: 0 or 1
+ */
+int fdisk_ask_yesno_get_result(struct fdisk_ask *ask)
+{
+	assert(ask);
+	assert(fdisk_is_ask(ask, YESNO));
+	return ask->data.yesno.result;
+}
+
+/**
+ * fdisk_ask_yesno_set_result:
+ * @ask: ask instance
+ * @result: 1 or 0
+ *
+ * Returns: 0 on success, <0 on error
+ */
+int fdisk_ask_yesno_set_result(struct fdisk_ask *ask, int result)
+{
+	assert(ask);
+	ask->data.yesno.result = result;
+	return 0;
+}
+
+/*
+ * menu
+ */
+int fdisk_ask_menu_set_default(struct fdisk_ask *ask, int dfl)
+{
+	assert(ask);
+	assert(fdisk_is_ask(ask, MENU));
+	ask->data.menu.dfl = dfl;
+	return 0;
+}
+
+/**
+ * fdisk_ask_menu_get_default:
+ * @ask: ask instance
+ *
+ * Returns: default menu item key
+ */
+int fdisk_ask_menu_get_default(struct fdisk_ask *ask)
+{
+	assert(ask);
+	assert(fdisk_is_ask(ask, MENU));
+	return ask->data.menu.dfl;
+}
+
+/**
+ * fdisk_ask_menu_set_result:
+ * @ask: ask instance
+ * @key: result
+ *
+ * Returns: 0 on success, <0 on error
+ */
+int fdisk_ask_menu_set_result(struct fdisk_ask *ask, int key)
+{
+	assert(ask);
+	assert(fdisk_is_ask(ask, MENU));
+	ask->data.menu.result = key;
+	DBG(ASK, ul_debugobj(ask, "menu result: %c\n", key));
+	return 0;
+
+}
+
+/**
+ * fdisk_ask_menu_get_result:
+ * @ask: ask instance
+ * @key: returns selected menu item key
+ *
+ * Returns: 0 on success, <0 on error.
+ */
+int fdisk_ask_menu_get_result(struct fdisk_ask *ask, int *key)
+{
+	assert(ask);
+	assert(fdisk_is_ask(ask, MENU));
+	if (key)
+		*key =  ask->data.menu.result;
+	return 0;
+}
+
+/**
+ * fdisk_ask_menu_get_item:
+ * @ask: ask menu instance
+ * @idx: wanted menu item index
+ * @key: returns key of the menu item
+ * @name: returns name of the menu item
+ * @desc: returns description of the menu item
+ *
+ * Returns: 0 on success, <0 on error, >0 if idx out-of-range
+ */
+int fdisk_ask_menu_get_item(struct fdisk_ask *ask, size_t idx, int *key,
+			    const char **name, const char **desc)
+{
+	size_t i;
+	struct ask_menuitem *mi;
+
+	assert(ask);
+	assert(fdisk_is_ask(ask, MENU));
+
+	for (i = 0, mi = ask->data.menu.first; mi; mi = mi->next, i++) {
+		if (i == idx)
+			break;
+	}
+
+	if (!mi)
+		return 1;	/* no more items */
+	if (key)
+		*key = mi->key;
+	if (name)
+		*name = mi->name;
+	if (desc)
+		*desc = mi->desc;
+	return 0;
+}
+
+static void fdisk_ask_menu_reset_items(struct fdisk_ask *ask)
+{
+	struct ask_menuitem *mi;
+
+	assert(ask);
+	assert(fdisk_is_ask(ask, MENU));
+
+	for (mi = ask->data.menu.first; mi; ) {
+		struct ask_menuitem *next = mi->next;
+		free(mi);
+		mi = next;
+	}
+}
+
+/**
+ * fdisk_ask_menu_get_nitems:
+ * @ask: ask instance
+ *
+ * Returns: number of menu items
+ */
+size_t fdisk_ask_menu_get_nitems(struct fdisk_ask *ask)
+{
+	struct ask_menuitem *mi;
+	size_t n;
+
+	assert(ask);
+	assert(fdisk_is_ask(ask, MENU));
+
+	for (n = 0, mi = ask->data.menu.first; mi; mi = mi->next, n++);
+
+	return n;
+}
+
+int fdisk_ask_menu_add_item(struct fdisk_ask *ask, int key,
+			const char *name, const char *desc)
+{
+	struct ask_menuitem *mi;
+
+	assert(ask);
+	assert(fdisk_is_ask(ask, MENU));
+
+	mi = calloc(1, sizeof(*mi));
+	if (!mi)
+		return -ENOMEM;
+	mi->key = key;
+	mi->name = name;
+	mi->desc = desc;
+
+	if (!ask->data.menu.first)
+		ask->data.menu.first = mi;
+	else {
+	        struct ask_menuitem *last = ask->data.menu.first;
+
+		while (last->next)
+			last = last->next;
+		last->next = mi;
+	}
+
+	DBG(ASK, ul_debugobj(ask, "new menu item: %c, \"%s\" (%s)\n", mi->key, mi->name, mi->desc));
+	return 0;
+}
+
+
+/*
+ * print-like
+ */
+
+#define is_print_ask(a) (fdisk_is_ask(a, WARN) || fdisk_is_ask(a, WARNX) || fdisk_is_ask(a, INFO))
+
+/**
+ * fdisk_ask_print_get_errno:
+ * @ask: ask instance
+ *
+ * Returns: error number for warning/error messages
+ */
+int fdisk_ask_print_get_errno(struct fdisk_ask *ask)
+{
+	assert(ask);
+	assert(is_print_ask(ask));
+	return ask->data.print.errnum;
+}
+
+int fdisk_ask_print_set_errno(struct fdisk_ask *ask, int errnum)
+{
+	assert(ask);
+	ask->data.print.errnum = errnum;
+	return 0;
+}
+
+/**
+ * fdisk_ask_print_get_mesg:
+ * @ask: ask instance
+ *
+ * Returns: pointer to message
+ */
+const char *fdisk_ask_print_get_mesg(struct fdisk_ask *ask)
+{
+	assert(ask);
+	assert(is_print_ask(ask));
+	return ask->data.print.mesg;
+}
+
+/* does not reallocate the message! */
+int fdisk_ask_print_set_mesg(struct fdisk_ask *ask, const char *mesg)
+{
+	assert(ask);
+	ask->data.print.mesg = mesg;
+	return 0;
+}
+
+static int do_vprint(struct fdisk_context *cxt, int errnum, int type,
+		     const char *fmt, va_list va)
+{
+	struct fdisk_ask *ask;
+	int rc;
+	char *mesg;
+
+	assert(cxt);
+
+	if (vasprintf(&mesg, fmt, va) < 0)
+		return -ENOMEM;
+
+	ask = fdisk_new_ask();
+	if (!ask) {
+		free(mesg);
+		return -ENOMEM;
+	}
+
+	fdisk_ask_set_type(ask, type);
+	fdisk_ask_print_set_mesg(ask, mesg);
+	if (errnum >= 0)
+		fdisk_ask_print_set_errno(ask, errnum);
+	rc = fdisk_do_ask(cxt, ask);
+
+	fdisk_unref_ask(ask);
+	free(mesg);
+	return rc;
+}
+
+/**
+ * fdisk_info:
+ * @cxt: context
+ * @fmt: printf-like formatted string
+ * @...: variable parametrs
+ *
+ * High-level API to print info messages,
+ *
+ * Returns: 0 on success, <0 on error
+ */
+int fdisk_info(struct fdisk_context *cxt, const char *fmt, ...)
+{
+	int rc;
+	va_list ap;
+
+	assert(cxt);
+	va_start(ap, fmt);
+	rc = do_vprint(cxt, -1, FDISK_ASKTYPE_INFO, fmt, ap);
+	va_end(ap);
+	return rc;
+}
+
+/**
+ * fdisk_info:
+ * @cxt: context
+ * @fmt: printf-like formatted string
+ * @...: variable parametrs
+ *
+ * High-level API to print warning message (errno expected)
+ *
+ * Returns: 0 on success, <0 on error
+ */
+int fdisk_warn(struct fdisk_context *cxt, const char *fmt, ...)
+{
+	int rc;
+	va_list ap;
+
+	assert(cxt);
+	va_start(ap, fmt);
+	rc = do_vprint(cxt, errno, FDISK_ASKTYPE_WARN, fmt, ap);
+	va_end(ap);
+	return rc;
+}
+
+/**
+ * fdisk_warnx:
+ * @cxt: context
+ * @fmt: printf-like formatted string
+ * @...: variable options
+ *
+ * High-level API to print warning message
+ *
+ * Returns: 0 on success, <0 on error
+ */
+int fdisk_warnx(struct fdisk_context *cxt, const char *fmt, ...)
+{
+	int rc;
+	va_list ap;
+
+	assert(cxt);
+	va_start(ap, fmt);
+	rc = do_vprint(cxt, -1, FDISK_ASKTYPE_WARNX, fmt, ap);
+	va_end(ap);
+	return rc;
+}
+
+int fdisk_info_new_partition(
+			struct fdisk_context *cxt,
+			int num, fdisk_sector_t start, fdisk_sector_t stop,
+			struct fdisk_parttype *t)
+{
+	int rc;
+	char *str = size_to_human_string(SIZE_SUFFIX_3LETTER | SIZE_SUFFIX_SPACE,
+				     (uint64_t)(stop - start + 1) * cxt->sector_size);
+
+	rc = fdisk_info(cxt,
+			_("Created a new partition %d of type '%s' and of size %s."),
+			num, t ? t->name : _("Unknown"), str);
+	free(str);
+	return rc;
+}
+
+#ifdef TEST_PROGRAM
+int test_ranges(struct fdisk_test *ts, int argc, char *argv[])
+{
+	/*                1  -  3,       6,    8, 9,   11    13 */
+	size_t nums[] = { 1, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1 };
+	size_t numx[] = { 0, 0, 0 };
+	char range[BUFSIZ], *ptr = range;
+	size_t i, len = sizeof(range), begin = 0, run = 0;
+
+	for (i = 0; i < ARRAY_SIZE(nums); i++) {
+		if (!nums[i])
+			continue;
+		ptr = mk_string_list(ptr, &len, &begin, &run, i, 0);
+	}
+	mk_string_list(ptr, &len, &begin, &run, -1, 0);
+	printf("list: '%s'\n", range);
+
+	ptr = range;
+	len = sizeof(range), begin = 0, run = 0;
+	for (i = 0; i < ARRAY_SIZE(numx); i++) {
+		if (!numx[i])
+			continue;
+		ptr = mk_string_list(ptr, &len, &begin, &run, i, 0);
+	}
+	mk_string_list(ptr, &len, &begin, &run, -1, 0);
+	printf("empty list: '%s'\n", range);
+
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	struct fdisk_test tss[] = {
+	{ "--ranges",  test_ranges,    "generates ranges" },
+	{ NULL }
+	};
+
+	return fdisk_run_test(tss, argc, argv);
+}
+
+#endif