[thirdparty/util-linux.git] / libmount / src / tab_diff.c

/*
 * Copyright (C) 2011 Karel Zak <kzak@redhat.com>
 *
 * This file may be redistributed under the terms of the
 * GNU Lesser General Public License.
 */

/**
 * SECTION: tabdiff
 * @title: Monitor mountinfo changes
 * @short_description: monitor changes in the list of the mounted filesystems
 */
#include "mountP.h"

struct tabdiff_entry {
	int	oper;			/* MNT_TABDIFF_* flags; */

	struct libmnt_fs *old_fs;	/* pointer to the old FS */
	struct libmnt_fs *new_fs;	/* pointer to the new FS */

	struct list_head changes;
};

struct libmnt_tabdiff {
	int nchanges;			/* number of changes */

	struct list_head changes;	/* list with modified entries */
	struct list_head unused;	/* list with unused entries */
};

/**
 * mnt_new_tabdiff:
 *
 * Allocates a new table diff struct.
 *
 * Returns: new diff handler or NULL.
 */
struct libmnt_tabdiff *mnt_new_tabdiff(void)
{
	struct libmnt_tabdiff *df = calloc(1, sizeof(*df));

	if (!df)
		return NULL;

	DBG(DIFF, mnt_debug_h(df, "alloc"));

	INIT_LIST_HEAD(&df->changes);
	INIT_LIST_HEAD(&df->unused);
	return df;
}

static void free_tabdiff_entry(struct tabdiff_entry *de)
{
	if (!de)
		return;
	list_del(&de->changes);
	mnt_unref_fs(de->new_fs);
	mnt_unref_fs(de->old_fs);
	free(de);
}

/**
 * mnt_free_tabdiff:
 * @df: tab diff
 *
 * Deallocates tab diff struct and all entries.
 */
void mnt_free_tabdiff(struct libmnt_tabdiff *df)
{
	if (!df)
		return;

	DBG(DIFF, mnt_debug_h(df, "free"));

	while (!list_empty(&df->changes)) {
		struct tabdiff_entry *de = list_entry(df->changes.next,
			                  struct tabdiff_entry, changes);
		free_tabdiff_entry(de);
	}

	free(df);
}

/**
 * mnt_tabdiff_next_change:
 * @df: tabdiff pointer
 * @itr: iterator
 * @old_fs: returns the old entry or NULL if new entry added
 * @new_fs: returns the new entry or NULL if old entry removed
 * @oper: MNT_TABDIFF_{MOVE,UMOUNT,REMOUNT,MOUNT} flags
 *
 * The options @old_fs, @new_fs and @oper are optional.
 *
 * Returns: 0 on success, negative number in case of error or 1 at the end of list.
 */
int mnt_tabdiff_next_change(struct libmnt_tabdiff *df, struct libmnt_iter *itr,
		struct libmnt_fs **old_fs, struct libmnt_fs **new_fs, int *oper)
{
	int rc = 1;
	struct tabdiff_entry *de = NULL;

	assert(df);
	assert(df);

	if (!df || !itr)
		return -EINVAL;

	if (!itr->head)
		MNT_ITER_INIT(itr, &df->changes);
	if (itr->p != itr->head) {
		MNT_ITER_ITERATE(itr, de, struct tabdiff_entry, changes);
		rc = 0;
	}

	if (old_fs)
		*old_fs = de ? de->old_fs : NULL;
	if (new_fs)
		*new_fs = de ? de->new_fs : NULL;
	if (oper)
		*oper = de ? de->oper : 0;

	return rc;
}

static int tabdiff_reset(struct libmnt_tabdiff *df)
{
	assert(df);

	DBG(DIFF, mnt_debug_h(df, "resetting"));

	/* zeroize all entries and move them to the list of unused
	 */
	while (!list_empty(&df->changes)) {
		struct tabdiff_entry *de = list_entry(df->changes.next,
			                  struct tabdiff_entry, changes);

		list_del(&de->changes);
		list_add_tail(&de->changes, &df->unused);

		mnt_unref_fs(de->new_fs);
		mnt_unref_fs(de->old_fs);

		de->new_fs = de->old_fs = NULL;
		de->oper = 0;
	}

	df->nchanges = 0;
	return 0;
}

static int tabdiff_add_entry(struct libmnt_tabdiff *df, struct libmnt_fs *old,
			     struct libmnt_fs *new, int oper)
{
	struct tabdiff_entry *de;

	assert(df);

	DBG(DIFF, mnt_debug_h(df, "add change on %s",
				mnt_fs_get_target(new ? new : old)));

	if (!list_empty(&df->unused)) {
		de = list_entry(df->unused.next, struct tabdiff_entry, changes);
		list_del(&de->changes);
	} else {
		de = calloc(1, sizeof(*de));
		if (!de)
			return -ENOMEM;
	}

	INIT_LIST_HEAD(&de->changes);

	mnt_ref_fs(new);
	mnt_ref_fs(old);

	mnt_unref_fs(de->new_fs);
	mnt_unref_fs(de->old_fs);

	de->old_fs = old;
	de->new_fs = new;
	de->oper = oper;

	list_add_tail(&de->changes, &df->changes);
	df->nchanges++;
	return 0;
}

static struct tabdiff_entry *tabdiff_get_mount(struct libmnt_tabdiff *df,
					       const char *src,
					       int id)
{
	struct list_head *p;

	assert(df);

	list_for_each(p, &df->changes) {
		struct tabdiff_entry *de;

		de = list_entry(p, struct tabdiff_entry, changes);

		if (de->oper == MNT_TABDIFF_MOUNT && de->new_fs &&
		    mnt_fs_get_id(de->new_fs) == id) {

			const char *s = mnt_fs_get_source(de->new_fs);

			if (s == NULL && src == NULL)
				return de;
			if (s && src && strcmp(s, src) == 0)
				return de;
		}
	}
	return NULL;
}

/**
 * mnt_diff_tables:
 * @df: diff handler
 * @old_tab: old table
 * @new_tab: new table
 *
 * Compares @old_tab and @new_tab, the result is stored in @df and accessible by
 * mnt_tabdiff_next_change().
 *
 * Returns: number of changes, negative number in case of error.
 */
int mnt_diff_tables(struct libmnt_tabdiff *df, struct libmnt_table *old_tab,
		    struct libmnt_table *new_tab)
{
	struct libmnt_fs *fs;
	struct libmnt_iter itr;
	int no, nn;

	if (!df || !old_tab || !new_tab)
		return -EINVAL;

	tabdiff_reset(df);

	no = mnt_table_get_nents(old_tab);
	nn = mnt_table_get_nents(new_tab);

	if (!no && !nn)			/* both tables are empty */
		return 0;

	DBG(DIFF, mnt_debug_h(df, "analyze new=%p (%d entries), "
				          "old=%p (%d entries)",
				new_tab, nn, old_tab, no));

	mnt_reset_iter(&itr, MNT_ITER_FORWARD);

	/* all mounted or umounted */
	if (!no && nn) {
		while(mnt_table_next_fs(new_tab, &itr, &fs) == 0)
			tabdiff_add_entry(df, NULL, fs, MNT_TABDIFF_MOUNT);
		goto done;

	} else if (no && !nn) {
		while(mnt_table_next_fs(old_tab, &itr, &fs) == 0)
			tabdiff_add_entry(df, fs, NULL, MNT_TABDIFF_UMOUNT);
		goto done;
	}

	/* search newly mounted or modified */
	while(mnt_table_next_fs(new_tab, &itr, &fs) == 0) {
		struct libmnt_fs *o_fs;
		const char *src = mnt_fs_get_source(fs),
			   *tgt = mnt_fs_get_target(fs);

		o_fs = mnt_table_find_pair(old_tab, src, tgt, MNT_ITER_FORWARD);
		if (!o_fs)
			/* 'fs' is not in the old table -- so newly mounted */
			tabdiff_add_entry(df, NULL, fs, MNT_TABDIFF_MOUNT);
		else {
			/* is modified? */
			const char *v1 = mnt_fs_get_vfs_options(o_fs),
				   *v2 = mnt_fs_get_vfs_options(fs),
				   *f1 = mnt_fs_get_fs_options(o_fs),
				   *f2 = mnt_fs_get_fs_options(fs);

			if ((v1 && v2 && strcmp(v1, v2)) || (f1 && f2 && strcmp(f1, f2)))
				tabdiff_add_entry(df, o_fs, fs, MNT_TABDIFF_REMOUNT);
		}
	}

	/* search umounted or moved */
	mnt_reset_iter(&itr, MNT_ITER_FORWARD);
	while(mnt_table_next_fs(old_tab, &itr, &fs) == 0) {
		const char *src = mnt_fs_get_source(fs),
			   *tgt = mnt_fs_get_target(fs);

		if (!mnt_table_find_pair(new_tab, src, tgt, MNT_ITER_FORWARD)) {
			struct tabdiff_entry *de;

			de = tabdiff_get_mount(df, src,	mnt_fs_get_id(fs));
			if (de) {
				mnt_ref_fs(fs);
				mnt_unref_fs(de->old_fs);
				de->oper = MNT_TABDIFF_MOVE;
				de->old_fs = fs;
			} else
				tabdiff_add_entry(df, fs, NULL, MNT_TABDIFF_UMOUNT);
		}
	}
done:
	DBG(DIFF, mnt_debug_h(df, "%d changes detected", df->nchanges));
	return df->nchanges;
}

#ifdef TEST_PROGRAM

int test_diff(struct libmnt_test *ts, int argc, char *argv[])
{
	struct libmnt_table *tb_old = NULL, *tb_new = NULL;
	struct libmnt_tabdiff *diff = NULL;
	struct libmnt_iter *itr;
	struct libmnt_fs *old, *new;
	int rc = -1, change;

	tb_old = mnt_new_table_from_file(argv[1]);
	tb_new = mnt_new_table_from_file(argv[2]);
	diff = mnt_new_tabdiff();
	itr = mnt_new_iter(MNT_ITER_FORWARD);

	if (!tb_old || !tb_new || !diff || !itr) {
		warnx("failed to allocate resources");
		goto done;
	}

	rc = mnt_diff_tables(diff, tb_old, tb_new);
	if (rc < 0)
		goto done;

	while(mnt_tabdiff_next_change(diff, itr, &old, &new, &change) == 0) {

		printf("%s on %s: ", mnt_fs_get_source(new ? new : old),
				     mnt_fs_get_target(new ? new : old));

		switch(change) {
		case MNT_TABDIFF_MOVE:
			printf("MOVED to %s\n", mnt_fs_get_target(new));
			break;
		case MNT_TABDIFF_UMOUNT:
			printf("UMOUNTED\n");
			break;
		case MNT_TABDIFF_REMOUNT:
			printf("REMOUNTED from '%s' to '%s'\n",
					mnt_fs_get_options(old),
					mnt_fs_get_options(new));
			break;
		case MNT_TABDIFF_MOUNT:
			printf("MOUNTED\n");
			break;
		default:
			printf("unknown change!\n");
		}
	}

	rc = 0;
done:
	mnt_free_table(tb_old);
	mnt_free_table(tb_new);
	mnt_free_tabdiff(diff);
	mnt_free_iter(itr);
	return rc;
}

int main(int argc, char *argv[])
{
	struct libmnt_test tss[] = {
		{ "--diff", test_diff, "<old> <new> prints change" },
		{ NULL }
	};

	return mnt_run_test(tss, argc, argv);
}

#endif /* TEST_PROGRAM */
Commit	Line	Data
e86623f0 KZ	1	/*
	2	* Copyright (C) 2011 Karel Zak <kzak@redhat.com>
	3	*
	4	* This file may be redistributed under the terms of the
	5	* GNU Lesser General Public License.
	6	*/
	7
	8	/**
	9	* SECTION: tabdiff
63de90d4	10	* @title: Monitor mountinfo changes
e86623f0 KZ	11	* @short_description: monitor changes in the list of the mounted filesystems
e86623f0 KZ	12	*/
e86623f0 KZ	13	#include "mountP.h"
	14
	15	struct tabdiff_entry {
	16	int oper; /* MNT_TABDIFF_* flags; */
	17
	18	struct libmnt_fs old_fs; / pointer to the old FS */
	19	struct libmnt_fs new_fs; / pointer to the new FS */
	20
	21	struct list_head changes;
	22	};
	23
	24	struct libmnt_tabdiff {
	25	int nchanges; /* number of changes */
	26
	27	struct list_head changes; /* list with modified entries */
d58b3157	28	struct list_head unused; /* list with unused entries */
e86623f0 KZ	29	};
	30
	31	/**
	32	* mnt_new_tabdiff:
	33	*
	34	* Allocates a new table diff struct.
	35	*
	36	* Returns: new diff handler or NULL.
	37	*/
	38	struct libmnt_tabdiff *mnt_new_tabdiff(void)
	39	{
	40	struct libmnt_tabdiff df = calloc(1, sizeof(df));
	41
	42	if (!df)
	43	return NULL;
	44
	45	DBG(DIFF, mnt_debug_h(df, "alloc"));
	46
	47	INIT_LIST_HEAD(&df->changes);
	48	INIT_LIST_HEAD(&df->unused);
	49	return df;
	50	}
	51
	52	static void free_tabdiff_entry(struct tabdiff_entry *de)
	53	{
	54	if (!de)
	55	return;
	56	list_del(&de->changes);
26d0c0ae KZ	57	mnt_unref_fs(de->new_fs);
26d0c0ae KZ	58	mnt_unref_fs(de->old_fs);
e86623f0 KZ	59	free(de);
	60	}
	61
	62	/**
	63	* mnt_free_tabdiff:
	64	* @df: tab diff
	65	*
	66	* Deallocates tab diff struct and all entries.
	67	*/
	68	void mnt_free_tabdiff(struct libmnt_tabdiff *df)
	69	{
	70	if (!df)
	71	return;
	72
	73	DBG(DIFF, mnt_debug_h(df, "free"));
	74
	75	while (!list_empty(&df->changes)) {
	76	struct tabdiff_entry *de = list_entry(df->changes.next,
	77	struct tabdiff_entry, changes);
	78	free_tabdiff_entry(de);
	79	}
	80
	81	free(df);
	82	}
	83
	84	/**
	85	* mnt_tabdiff_next_change:
	86	* @df: tabdiff pointer
	87	* @itr: iterator
	88	* @old_fs: returns the old entry or NULL if new entry added
	89	* @new_fs: returns the new entry or NULL if old entry removed
	90	* @oper: MNT_TABDIFF_{MOVE,UMOUNT,REMOUNT,MOUNT} flags
	91	*
	92	* The options @old_fs, @new_fs and @oper are optional.
	93	*
d58b3157	94	* Returns: 0 on success, negative number in case of error or 1 at the end of list.
e86623f0 KZ	95	*/
	96	int mnt_tabdiff_next_change(struct libmnt_tabdiff df, struct libmnt_iter itr,
	97	struct libmnt_fs old_fs, struct libmnt_fs new_fs, int *oper)
	98	{
	99	int rc = 1;
	100	struct tabdiff_entry *de = NULL;
	101
	102	assert(df);
	103	assert(df);
	104
	105	if (!df \|\| !itr)
	106	return -EINVAL;
	107
	108	if (!itr->head)
	109	MNT_ITER_INIT(itr, &df->changes);
	110	if (itr->p != itr->head) {
	111	MNT_ITER_ITERATE(itr, de, struct tabdiff_entry, changes);
	112	rc = 0;
	113	}
	114
	115	if (old_fs)
	116	*old_fs = de ? de->old_fs : NULL;
	117	if (new_fs)
	118	*new_fs = de ? de->new_fs : NULL;
	119	if (oper)
	120	*oper = de ? de->oper : 0;
	121
	122	return rc;
	123	}
	124
	125	static int tabdiff_reset(struct libmnt_tabdiff *df)
	126	{
	127	assert(df);
	128
d58b3157	129	DBG(DIFF, mnt_debug_h(df, "resetting"));
e86623f0	130
d58b3157	131	/* zeroize all entries and move them to the list of unused
e86623f0 KZ	132	*/
	133	while (!list_empty(&df->changes)) {
	134	struct tabdiff_entry *de = list_entry(df->changes.next,
	135	struct tabdiff_entry, changes);
	136
	137	list_del(&de->changes);
	138	list_add_tail(&de->changes, &df->unused);
	139
26d0c0ae KZ	140	mnt_unref_fs(de->new_fs);
	141	mnt_unref_fs(de->old_fs);
	142
e86623f0 KZ	143	de->new_fs = de->old_fs = NULL;
	144	de->oper = 0;
	145	}
	146
	147	df->nchanges = 0;
	148	return 0;
	149	}
	150
	151	static int tabdiff_add_entry(struct libmnt_tabdiff df, struct libmnt_fs old,
	152	struct libmnt_fs *new, int oper)
	153	{
	154	struct tabdiff_entry *de;
	155
	156	assert(df);
	157
	158	DBG(DIFF, mnt_debug_h(df, "add change on %s",
	159	mnt_fs_get_target(new ? new : old)));
	160
	161	if (!list_empty(&df->unused)) {
	162	de = list_entry(df->unused.next, struct tabdiff_entry, changes);
	163	list_del(&de->changes);
	164	} else {
	165	de = calloc(1, sizeof(*de));
	166	if (!de)
	167	return -ENOMEM;
	168	}
	169
	170	INIT_LIST_HEAD(&de->changes);
	171
26d0c0ae KZ	172	mnt_ref_fs(new);
	173	mnt_ref_fs(old);
	174
	175	mnt_unref_fs(de->new_fs);
	176	mnt_unref_fs(de->old_fs);
	177
e86623f0 KZ	178	de->old_fs = old;
	179	de->new_fs = new;
	180	de->oper = oper;
	181
	182	list_add_tail(&de->changes, &df->changes);
	183	df->nchanges++;
	184	return 0;
	185	}
	186
	187	static struct tabdiff_entry tabdiff_get_mount(struct libmnt_tabdiff df,
	188	const char *src,
	189	int id)
	190	{
	191	struct list_head *p;
	192
	193	assert(df);
e86623f0 KZ	194
	195	list_for_each(p, &df->changes) {
	196	struct tabdiff_entry *de;
	197
	198	de = list_entry(p, struct tabdiff_entry, changes);
	199
	200	if (de->oper == MNT_TABDIFF_MOUNT && de->new_fs &&
	201	mnt_fs_get_id(de->new_fs) == id) {
	202
	203	const char *s = mnt_fs_get_source(de->new_fs);
	204
0983b5f7 KZ	205	if (s == NULL && src == NULL)
	206	return de;
	207	if (s && src && strcmp(s, src) == 0)
e86623f0 KZ	208	return de;
	209	}
	210	}
	211	return NULL;
	212	}
	213
	214	/**
	215	* mnt_diff_tables:
	216	* @df: diff handler
ee314075 KZ	217	* @old_tab: old table
ee314075 KZ	218	* @new_tab: new table
e86623f0	219	*
ee314075	220	* Compares @old_tab and @new_tab, the result is stored in @df and accessible by
e86623f0 KZ	221	* mnt_tabdiff_next_change().
	222	*
	223	* Returns: number of changes, negative number in case of error.
	224	*/
ee314075 KZ	225	int mnt_diff_tables(struct libmnt_tabdiff df, struct libmnt_table old_tab,
ee314075 KZ	226	struct libmnt_table *new_tab)
e86623f0 KZ	227	{
	228	struct libmnt_fs *fs;
	229	struct libmnt_iter itr;
	230	int no, nn;
	231
ee314075	232	if (!df \|\| !old_tab \|\| !new_tab)
e86623f0 KZ	233	return -EINVAL;
	234
	235	tabdiff_reset(df);
	236
ee314075 KZ	237	no = mnt_table_get_nents(old_tab);
ee314075 KZ	238	nn = mnt_table_get_nents(new_tab);
e86623f0 KZ	239
	240	if (!no && !nn) /* both tables are empty */
	241	return 0;
	242
	243	DBG(DIFF, mnt_debug_h(df, "analyze new=%p (%d entries), "
	244	"old=%p (%d entries)",
ee314075	245	new_tab, nn, old_tab, no));
e86623f0 KZ	246
	247	mnt_reset_iter(&itr, MNT_ITER_FORWARD);
	248
	249	/* all mounted or umounted */
	250	if (!no && nn) {
ee314075	251	while(mnt_table_next_fs(new_tab, &itr, &fs) == 0)
e86623f0 KZ	252	tabdiff_add_entry(df, NULL, fs, MNT_TABDIFF_MOUNT);
	253	goto done;
	254
	255	} else if (no && !nn) {
ee314075	256	while(mnt_table_next_fs(old_tab, &itr, &fs) == 0)
e86623f0 KZ	257	tabdiff_add_entry(df, fs, NULL, MNT_TABDIFF_UMOUNT);
	258	goto done;
	259	}
	260
	261	/* search newly mounted or modified */
ee314075	262	while(mnt_table_next_fs(new_tab, &itr, &fs) == 0) {
e86623f0 KZ	263	struct libmnt_fs *o_fs;
	264	const char *src = mnt_fs_get_source(fs),
	265	*tgt = mnt_fs_get_target(fs);
	266
ee314075	267	o_fs = mnt_table_find_pair(old_tab, src, tgt, MNT_ITER_FORWARD);
e86623f0 KZ	268	if (!o_fs)
	269	/* 'fs' is not in the old table -- so newly mounted */
	270	tabdiff_add_entry(df, NULL, fs, MNT_TABDIFF_MOUNT);
	271	else {
	272	/* is modified? */
994871c5 KZ	273	const char *v1 = mnt_fs_get_vfs_options(o_fs),
	274	*v2 = mnt_fs_get_vfs_options(fs),
	275	*f1 = mnt_fs_get_fs_options(o_fs),
	276	*f2 = mnt_fs_get_fs_options(fs);
e86623f0	277
994871c5	278	if ((v1 && v2 && strcmp(v1, v2)) \|\| (f1 && f2 && strcmp(f1, f2)))
e86623f0 KZ	279	tabdiff_add_entry(df, o_fs, fs, MNT_TABDIFF_REMOUNT);
	280	}
	281	}
	282
	283	/* search umounted or moved */
	284	mnt_reset_iter(&itr, MNT_ITER_FORWARD);
ee314075	285	while(mnt_table_next_fs(old_tab, &itr, &fs) == 0) {
e86623f0 KZ	286	const char *src = mnt_fs_get_source(fs),
	287	*tgt = mnt_fs_get_target(fs);
	288
ee314075	289	if (!mnt_table_find_pair(new_tab, src, tgt, MNT_ITER_FORWARD)) {
e86623f0 KZ	290	struct tabdiff_entry *de;
	291
	292	de = tabdiff_get_mount(df, src, mnt_fs_get_id(fs));
	293	if (de) {
26d0c0ae KZ	294	mnt_ref_fs(fs);
26d0c0ae KZ	295	mnt_unref_fs(de->old_fs);
e86623f0 KZ	296	de->oper = MNT_TABDIFF_MOVE;
	297	de->old_fs = fs;
	298	} else
	299	tabdiff_add_entry(df, fs, NULL, MNT_TABDIFF_UMOUNT);
	300	}
	301	}
	302	done:
	303	DBG(DIFF, mnt_debug_h(df, "%d changes detected", df->nchanges));
	304	return df->nchanges;
	305	}
	306
	307	#ifdef TEST_PROGRAM
	308
	309	int test_diff(struct libmnt_test ts, int argc, char argv[])
	310	{
	311	struct libmnt_table tb_old = NULL, tb_new = NULL;
	312	struct libmnt_tabdiff *diff = NULL;
	313	struct libmnt_iter *itr;
	314	struct libmnt_fs old, new;
	315	int rc = -1, change;
	316
	317	tb_old = mnt_new_table_from_file(argv[1]);
	318	tb_new = mnt_new_table_from_file(argv[2]);
	319	diff = mnt_new_tabdiff();
	320	itr = mnt_new_iter(MNT_ITER_FORWARD);
	321
	322	if (!tb_old \|\| !tb_new \|\| !diff \|\| !itr) {
	323	warnx("failed to allocate resources");
	324	goto done;
	325	}
	326
	327	rc = mnt_diff_tables(diff, tb_old, tb_new);
	328	if (rc < 0)
	329	goto done;
	330
	331	while(mnt_tabdiff_next_change(diff, itr, &old, &new, &change) == 0) {
	332
	333	printf("%s on %s: ", mnt_fs_get_source(new ? new : old),
	334	mnt_fs_get_target(new ? new : old));
	335
	336	switch(change) {
	337	case MNT_TABDIFF_MOVE:
	338	printf("MOVED to %s\n", mnt_fs_get_target(new));
	339	break;
	340	case MNT_TABDIFF_UMOUNT:
	341	printf("UMOUNTED\n");
	342	break;
	343	case MNT_TABDIFF_REMOUNT:
	344	printf("REMOUNTED from '%s' to '%s'\n",
	345	mnt_fs_get_options(old),
	346	mnt_fs_get_options(new));
	347	break;
	348	case MNT_TABDIFF_MOUNT:
	349	printf("MOUNTED\n");
	350	break;
	351	default:
	352	printf("unknown change!\n");
	353	}
	354	}
	355
	356	rc = 0;
	357	done:
	358	mnt_free_table(tb_old);
	359	mnt_free_table(tb_new);
360	mnt_free_tabdiff(diff);
9bf51834	361	mnt_free_iter(itr);
e86623f0 KZ	362	return rc;
	363	}
	364
	365	int main(int argc, char *argv[])
	366	{
	367	struct libmnt_test tss[] = {
	368	{ "--diff", test_diff, "<old> <new> prints change" },
	369	{ NULL }
	370	};
	371
	372	return mnt_run_test(tss, argc, argv);
	373	}
	374
	375	#endif /* TEST_PROGRAM */