[thirdparty/systemd.git] / src / test / test-escape.c

/* SPDX-License-Identifier: LGPL-2.1+ */

#include "alloc-util.h"
#include "escape.h"
#include "macro.h"
#include "tests.h"

static void test_cescape(void) {
        _cleanup_free_ char *t;

        assert_se(t = cescape("abc\\\"\b\f\n\r\t\v\a\003\177\234\313"));
        assert_se(streq(t, "abc\\\\\\\"\\b\\f\\n\\r\\t\\v\\a\\003\\177\\234\\313"));
}

static void test_xescape(void) {
        _cleanup_free_ char *t;

        assert_se(t = xescape("abc\\\"\b\f\n\r\t\v\a\003\177\234\313", ""));
        assert_se(streq(t, "abc\\x5c\"\\x08\\x0c\\x0a\\x0d\\x09\\x0b\\x07\\x03\\x7f\\x9c\\xcb"));
}

static void test_xescape_full(bool eight_bits) {
        const char* escaped = !eight_bits ?
                "a\\x62c\\x5c\"\\x08\\x0c\\x0a\\x0d\\x09\\x0b\\x07\\x03\\x7f\\x9c\\xcb" :
                "a\\x62c\\x5c\"\\x08\\x0c\\x0a\\x0d\\x09\\x0b\\x07\\x03\177\234\313";
        const unsigned full_fit = !eight_bits ? 55 : 46;

        for (unsigned i = 0; i < 60; i++) {
                _cleanup_free_ char *t;

                assert_se(t = xescape_full("abc\\\"\b\f\n\r\t\v\a\003\177\234\313", "b", i, eight_bits));

                log_info("%02d: %s", i, t);

                if (i >= full_fit)
                        assert_se(streq(t, escaped));
                else if (i >= 3) {
                        /* We need up to four columns, so up to three three columns may be wasted */
                        assert_se(strlen(t) == i || strlen(t) == i - 1 || strlen(t) == i - 2 || strlen(t) == i - 3);
                        assert_se(strneq(t, escaped, i - 3) || strneq(t, escaped, i - 4) ||
                                  strneq(t, escaped, i - 5) || strneq(t, escaped, i - 6));
                        assert_se(endswith(t, "..."));
                } else {
                        assert_se(strlen(t) == i);
                        assert_se(strneq(t, "...", i));
                }
        }
}

static void test_cunescape(void) {
        _cleanup_free_ char *unescaped;

        assert_se(cunescape("abc\\\\\\\"\\b\\f\\a\\n\\r\\t\\v\\003\\177\\234\\313\\000\\x00", 0, &unescaped) < 0);
        assert_se(cunescape("abc\\\\\\\"\\b\\f\\a\\n\\r\\t\\v\\003\\177\\234\\313\\000\\x00", UNESCAPE_RELAX, &unescaped) >= 0);
        assert_se(streq_ptr(unescaped, "abc\\\"\b\f\a\n\r\t\v\003\177\234\313\\000\\x00"));
        unescaped = mfree(unescaped);

        /* incomplete sequences */
        assert_se(cunescape("\\x0", 0, &unescaped) < 0);
        assert_se(cunescape("\\x0", UNESCAPE_RELAX, &unescaped) >= 0);
        assert_se(streq_ptr(unescaped, "\\x0"));
        unescaped = mfree(unescaped);

        assert_se(cunescape("\\x", 0, &unescaped) < 0);
        assert_se(cunescape("\\x", UNESCAPE_RELAX, &unescaped) >= 0);
        assert_se(streq_ptr(unescaped, "\\x"));
        unescaped = mfree(unescaped);

        assert_se(cunescape("\\", 0, &unescaped) < 0);
        assert_se(cunescape("\\", UNESCAPE_RELAX, &unescaped) >= 0);
        assert_se(streq_ptr(unescaped, "\\"));
        unescaped = mfree(unescaped);

        assert_se(cunescape("\\11", 0, &unescaped) < 0);
        assert_se(cunescape("\\11", UNESCAPE_RELAX, &unescaped) >= 0);
        assert_se(streq_ptr(unescaped, "\\11"));
        unescaped = mfree(unescaped);

        assert_se(cunescape("\\1", 0, &unescaped) < 0);
        assert_se(cunescape("\\1", UNESCAPE_RELAX, &unescaped) >= 0);
        assert_se(streq_ptr(unescaped, "\\1"));
        unescaped = mfree(unescaped);

        assert_se(cunescape("\\u0000", 0, &unescaped) < 0);
        assert_se(cunescape("\\u00DF\\U000000df\\u03a0\\U00000041", UNESCAPE_RELAX, &unescaped) >= 0);
        assert_se(streq_ptr(unescaped, "ßßΠA"));
        unescaped = mfree(unescaped);

        assert_se(cunescape("\\073", 0, &unescaped) >= 0);
        assert_se(streq_ptr(unescaped, ";"));
        unescaped = mfree(unescaped);

        assert_se(cunescape("A=A\\\\x0aB", 0, &unescaped) >= 0);
        assert_se(streq_ptr(unescaped, "A=A\\x0aB"));
        unescaped = mfree(unescaped);

        assert_se(cunescape("A=A\\\\x0aB", UNESCAPE_RELAX, &unescaped) >= 0);
        assert_se(streq_ptr(unescaped, "A=A\\x0aB"));
        unescaped = mfree(unescaped);

        assert_se(cunescape("\\x00\\x00\\x00", UNESCAPE_ACCEPT_NUL, &unescaped) == 3);
        assert_se(memcmp(unescaped, "\0\0\0", 3) == 0);
        unescaped = mfree(unescaped);

        assert_se(cunescape("\\u0000\\u0000\\u0000", UNESCAPE_ACCEPT_NUL, &unescaped) == 3);
        assert_se(memcmp(unescaped, "\0\0\0", 3) == 0);
        unescaped = mfree(unescaped);

        assert_se(cunescape("\\U00000000\\U00000000\\U00000000", UNESCAPE_ACCEPT_NUL, &unescaped) == 3);
        assert_se(memcmp(unescaped, "\0\0\0", 3) == 0);
        unescaped = mfree(unescaped);

        assert_se(cunescape("\\000\\000\\000", UNESCAPE_ACCEPT_NUL, &unescaped) == 3);
        assert_se(memcmp(unescaped, "\0\0\0", 3) == 0);
}

static void test_shell_escape_one(const char *s, const char *bad, const char *expected) {
        _cleanup_free_ char *r;

        assert_se(r = shell_escape(s, bad));
        assert_se(streq_ptr(r, expected));
}

static void test_shell_escape(void) {
        test_shell_escape_one("", "", "");
        test_shell_escape_one("\\", "", "\\\\");
        test_shell_escape_one("foobar", "", "foobar");
        test_shell_escape_one("foobar", "o", "f\\o\\obar");
        test_shell_escape_one("foo:bar,baz", ",:", "foo\\:bar\\,baz");
}

static void test_shell_maybe_quote_one(const char *s,
                                       EscapeStyle style,
                                       const char *expected) {
        _cleanup_free_ char *ret = NULL;

        assert_se(ret = shell_maybe_quote(s, style));
        log_debug("[%s] → [%s] (%s)", s, ret, expected);
        assert_se(streq(ret, expected));
}

static void test_shell_maybe_quote(void) {

        test_shell_maybe_quote_one("", ESCAPE_BACKSLASH, "");
        test_shell_maybe_quote_one("", ESCAPE_BACKSLASH_ONELINE, "");
        test_shell_maybe_quote_one("", ESCAPE_POSIX, "");
        test_shell_maybe_quote_one("\\", ESCAPE_BACKSLASH, "\"\\\\\"");
        test_shell_maybe_quote_one("\\", ESCAPE_BACKSLASH_ONELINE, "\"\\\\\"");
        test_shell_maybe_quote_one("\\", ESCAPE_POSIX, "$'\\\\'");
        test_shell_maybe_quote_one("\"", ESCAPE_BACKSLASH, "\"\\\"\"");
        test_shell_maybe_quote_one("\"", ESCAPE_BACKSLASH_ONELINE, "\"\\\"\"");
        test_shell_maybe_quote_one("\"", ESCAPE_POSIX, "$'\"'");
        test_shell_maybe_quote_one("foobar", ESCAPE_BACKSLASH, "foobar");
        test_shell_maybe_quote_one("foobar", ESCAPE_BACKSLASH_ONELINE, "foobar");
        test_shell_maybe_quote_one("foobar", ESCAPE_POSIX, "foobar");
        test_shell_maybe_quote_one("foo bar", ESCAPE_BACKSLASH, "\"foo bar\"");
        test_shell_maybe_quote_one("foo bar", ESCAPE_BACKSLASH_ONELINE, "\"foo bar\"");
        test_shell_maybe_quote_one("foo bar", ESCAPE_POSIX, "$'foo bar'");
        test_shell_maybe_quote_one("foo\tbar", ESCAPE_BACKSLASH, "\"foo\tbar\"");
        test_shell_maybe_quote_one("foo\tbar", ESCAPE_BACKSLASH_ONELINE, "\"foo\\tbar\"");
        test_shell_maybe_quote_one("foo\tbar", ESCAPE_POSIX, "$'foo\\tbar'");
        test_shell_maybe_quote_one("foo\nbar", ESCAPE_BACKSLASH, "\"foo\nbar\"");
        test_shell_maybe_quote_one("foo\nbar", ESCAPE_BACKSLASH_ONELINE, "\"foo\\nbar\"");
        test_shell_maybe_quote_one("foo\nbar", ESCAPE_POSIX, "$'foo\\nbar'");
        test_shell_maybe_quote_one("foo \"bar\" waldo", ESCAPE_BACKSLASH, "\"foo \\\"bar\\\" waldo\"");
        test_shell_maybe_quote_one("foo \"bar\" waldo", ESCAPE_BACKSLASH_ONELINE, "\"foo \\\"bar\\\" waldo\"");
        test_shell_maybe_quote_one("foo \"bar\" waldo", ESCAPE_POSIX, "$'foo \"bar\" waldo'");
        test_shell_maybe_quote_one("foo$bar", ESCAPE_BACKSLASH, "\"foo\\$bar\"");
        test_shell_maybe_quote_one("foo$bar", ESCAPE_BACKSLASH_ONELINE, "\"foo\\$bar\"");
        test_shell_maybe_quote_one("foo$bar", ESCAPE_POSIX, "$'foo$bar'");

        /* Note that current users disallow control characters, so this "test"
         * is here merely to establish current behaviour. If control characters
         * were allowed, they should be quoted, i.e. \001 should become \\001. */
        test_shell_maybe_quote_one("a\nb\001", ESCAPE_BACKSLASH, "\"a\nb\001\"");
        test_shell_maybe_quote_one("a\nb\001", ESCAPE_BACKSLASH_ONELINE, "\"a\\nb\001\"");
        test_shell_maybe_quote_one("a\nb\001", ESCAPE_POSIX, "$'a\\nb\001'");

        test_shell_maybe_quote_one("foo!bar", ESCAPE_BACKSLASH, "\"foo!bar\"");
        test_shell_maybe_quote_one("foo!bar", ESCAPE_BACKSLASH_ONELINE, "\"foo!bar\"");
        test_shell_maybe_quote_one("foo!bar", ESCAPE_POSIX, "$'foo!bar'");
}

int main(int argc, char *argv[]) {
        test_setup_logging(LOG_DEBUG);

        test_cescape();
        test_xescape();
        test_xescape_full(false);
        test_xescape_full(true);
        test_cunescape();
        test_shell_escape();
        test_shell_maybe_quote();

        return 0;
}
Commit	Line	Data
53e1b683	1	/* SPDX-License-Identifier: LGPL-2.1+ */
45e0b1f6 RC	2
	3	#include "alloc-util.h"
	4	#include "escape.h"
	5	#include "macro.h"
6d7c4033	6	#include "tests.h"
45e0b1f6 RC	7
45e0b1f6 RC	8	static void test_cescape(void) {
70d55819	9	_cleanup_free_ char *t;
45e0b1f6	10
70d55819 ZJS	11	assert_se(t = cescape("abc\\\"\b\f\n\r\t\v\a\003\177\234\313"));
	12	assert_se(streq(t, "abc\\\\\\\"\\b\\f\\n\\r\\t\\v\\a\\003\\177\\234\\313"));
	13	}
	14
	15	static void test_xescape(void) {
	16	_cleanup_free_ char *t;
	17
	18	assert_se(t = xescape("abc\\\"\b\f\n\r\t\v\a\003\177\234\313", ""));
	19	assert_se(streq(t, "abc\\x5c\"\\x08\\x0c\\x0a\\x0d\\x09\\x0b\\x07\\x03\\x7f\\x9c\\xcb"));
	20	}
	21
	22	static void test_xescape_full(bool eight_bits) {
	23	const char* escaped = !eight_bits ?
	24	"a\\x62c\\x5c\"\\x08\\x0c\\x0a\\x0d\\x09\\x0b\\x07\\x03\\x7f\\x9c\\xcb" :
	25	"a\\x62c\\x5c\"\\x08\\x0c\\x0a\\x0d\\x09\\x0b\\x07\\x03\177\234\313";
	26	const unsigned full_fit = !eight_bits ? 55 : 46;
	27
	28	for (unsigned i = 0; i < 60; i++) {
	29	_cleanup_free_ char *t;
	30
	31	assert_se(t = xescape_full("abc\\\"\b\f\n\r\t\v\a\003\177\234\313", "b", i, eight_bits));
	32
	33	log_info("%02d: %s", i, t);
	34
	35	if (i >= full_fit)
	36	assert_se(streq(t, escaped));
	37	else if (i >= 3) {
	38	/* We need up to four columns, so up to three three columns may be wasted */
	39	assert_se(strlen(t) == i \|\| strlen(t) == i - 1 \|\| strlen(t) == i - 2 \|\| strlen(t) == i - 3);
	40	assert_se(strneq(t, escaped, i - 3) \|\| strneq(t, escaped, i - 4) \|\|
	41	strneq(t, escaped, i - 5) \|\| strneq(t, escaped, i - 6));
	42	assert_se(endswith(t, "..."));
	43	} else {
	44	assert_se(strlen(t) == i);
	45	assert_se(strneq(t, "...", i));
	46	}
	47	}
45e0b1f6 RC	48	}
	49
	50	static void test_cunescape(void) {
	51	_cleanup_free_ char *unescaped;
	52
	53	assert_se(cunescape("abc\\\\\\\"\\b\\f\\a\\n\\r\\t\\v\\003\\177\\234\\313\\000\\x00", 0, &unescaped) < 0);
	54	assert_se(cunescape("abc\\\\\\\"\\b\\f\\a\\n\\r\\t\\v\\003\\177\\234\\313\\000\\x00", UNESCAPE_RELAX, &unescaped) >= 0);
	55	assert_se(streq_ptr(unescaped, "abc\\\"\b\f\a\n\r\t\v\003\177\234\313\\000\\x00"));
	56	unescaped = mfree(unescaped);
	57
	58	/* incomplete sequences */
	59	assert_se(cunescape("\\x0", 0, &unescaped) < 0);
	60	assert_se(cunescape("\\x0", UNESCAPE_RELAX, &unescaped) >= 0);
	61	assert_se(streq_ptr(unescaped, "\\x0"));
	62	unescaped = mfree(unescaped);
	63
	64	assert_se(cunescape("\\x", 0, &unescaped) < 0);
	65	assert_se(cunescape("\\x", UNESCAPE_RELAX, &unescaped) >= 0);
	66	assert_se(streq_ptr(unescaped, "\\x"));
	67	unescaped = mfree(unescaped);
	68
	69	assert_se(cunescape("\\", 0, &unescaped) < 0);
	70	assert_se(cunescape("\\", UNESCAPE_RELAX, &unescaped) >= 0);
	71	assert_se(streq_ptr(unescaped, "\\"));
	72	unescaped = mfree(unescaped);
	73
	74	assert_se(cunescape("\\11", 0, &unescaped) < 0);
	75	assert_se(cunescape("\\11", UNESCAPE_RELAX, &unescaped) >= 0);
	76	assert_se(streq_ptr(unescaped, "\\11"));
	77	unescaped = mfree(unescaped);
	78
	79	assert_se(cunescape("\\1", 0, &unescaped) < 0);
	80	assert_se(cunescape("\\1", UNESCAPE_RELAX, &unescaped) >= 0);
	81	assert_se(streq_ptr(unescaped, "\\1"));
	82	unescaped = mfree(unescaped);
	83
	84	assert_se(cunescape("\\u0000", 0, &unescaped) < 0);
	85	assert_se(cunescape("\\u00DF\\U000000df\\u03a0\\U00000041", UNESCAPE_RELAX, &unescaped) >= 0);
	86	assert_se(streq_ptr(unescaped, "ßßΠA"));
	87	unescaped = mfree(unescaped);
	88
	89	assert_se(cunescape("\\073", 0, &unescaped) >= 0);
	90	assert_se(streq_ptr(unescaped, ";"));
a096d8c8 ZJS	91	unescaped = mfree(unescaped);
	92
	93	assert_se(cunescape("A=A\\\\x0aB", 0, &unescaped) >= 0);
	94	assert_se(streq_ptr(unescaped, "A=A\\x0aB"));
	95	unescaped = mfree(unescaped);
	96
	97	assert_se(cunescape("A=A\\\\x0aB", UNESCAPE_RELAX, &unescaped) >= 0);
	98	assert_se(streq_ptr(unescaped, "A=A\\x0aB"));
a6a36dea YW	99	unescaped = mfree(unescaped);
	100
	101	assert_se(cunescape("\\x00\\x00\\x00", UNESCAPE_ACCEPT_NUL, &unescaped) == 3);
	102	assert_se(memcmp(unescaped, "\0\0\0", 3) == 0);
	103	unescaped = mfree(unescaped);
	104
	105	assert_se(cunescape("\\u0000\\u0000\\u0000", UNESCAPE_ACCEPT_NUL, &unescaped) == 3);
	106	assert_se(memcmp(unescaped, "\0\0\0", 3) == 0);
	107	unescaped = mfree(unescaped);
	108
	109	assert_se(cunescape("\\U00000000\\U00000000\\U00000000", UNESCAPE_ACCEPT_NUL, &unescaped) == 3);
	110	assert_se(memcmp(unescaped, "\0\0\0", 3) == 0);
	111	unescaped = mfree(unescaped);
	112
	113	assert_se(cunescape("\\000\\000\\000", UNESCAPE_ACCEPT_NUL, &unescaped) == 3);
	114	assert_se(memcmp(unescaped, "\0\0\0", 3) == 0);
45e0b1f6 RC	115	}
	116
	117	static void test_shell_escape_one(const char s, const char bad, const char *expected) {
	118	_cleanup_free_ char *r;
	119
	120	assert_se(r = shell_escape(s, bad));
	121	assert_se(streq_ptr(r, expected));
	122	}
	123
	124	static void test_shell_escape(void) {
	125	test_shell_escape_one("", "", "");
	126	test_shell_escape_one("\\", "", "\\\\");
	127	test_shell_escape_one("foobar", "", "foobar");
	128	test_shell_escape_one("foobar", "o", "f\\o\\obar");
	129	test_shell_escape_one("foo:bar,baz", ",:", "foo\\:bar\\,baz");
	130	}
	131
804ee07c ZJS	132	static void test_shell_maybe_quote_one(const char *s,
	133	EscapeStyle style,
	134	const char *expected) {
	135	_cleanup_free_ char *ret = NULL;
	136
	137	assert_se(ret = shell_maybe_quote(s, style));
	138	log_debug("[%s] → [%s] (%s)", s, ret, expected);
	139	assert_se(streq(ret, expected));
45e0b1f6 RC	140	}
	141
	142	static void test_shell_maybe_quote(void) {
	143
804ee07c	144	test_shell_maybe_quote_one("", ESCAPE_BACKSLASH, "");
2b99f645	145	test_shell_maybe_quote_one("", ESCAPE_BACKSLASH_ONELINE, "");
804ee07c ZJS	146	test_shell_maybe_quote_one("", ESCAPE_POSIX, "");
804ee07c ZJS	147	test_shell_maybe_quote_one("\\", ESCAPE_BACKSLASH, "\"\\\\\"");
2b99f645	148	test_shell_maybe_quote_one("\\", ESCAPE_BACKSLASH_ONELINE, "\"\\\\\"");
804ee07c ZJS	149	test_shell_maybe_quote_one("\\", ESCAPE_POSIX, "$'\\\\'");
804ee07c ZJS	150	test_shell_maybe_quote_one("\"", ESCAPE_BACKSLASH, "\"\\\"\"");
2b99f645	151	test_shell_maybe_quote_one("\"", ESCAPE_BACKSLASH_ONELINE, "\"\\\"\"");
804ee07c ZJS	152	test_shell_maybe_quote_one("\"", ESCAPE_POSIX, "$'\"'");
804ee07c ZJS	153	test_shell_maybe_quote_one("foobar", ESCAPE_BACKSLASH, "foobar");
2b99f645	154	test_shell_maybe_quote_one("foobar", ESCAPE_BACKSLASH_ONELINE, "foobar");
804ee07c ZJS	155	test_shell_maybe_quote_one("foobar", ESCAPE_POSIX, "foobar");
804ee07c ZJS	156	test_shell_maybe_quote_one("foo bar", ESCAPE_BACKSLASH, "\"foo bar\"");
2b99f645	157	test_shell_maybe_quote_one("foo bar", ESCAPE_BACKSLASH_ONELINE, "\"foo bar\"");
804ee07c ZJS	158	test_shell_maybe_quote_one("foo bar", ESCAPE_POSIX, "$'foo bar'");
804ee07c ZJS	159	test_shell_maybe_quote_one("foo\tbar", ESCAPE_BACKSLASH, "\"foo\tbar\"");
2b99f645	160	test_shell_maybe_quote_one("foo\tbar", ESCAPE_BACKSLASH_ONELINE, "\"foo\\tbar\"");
804ee07c ZJS	161	test_shell_maybe_quote_one("foo\tbar", ESCAPE_POSIX, "$'foo\\tbar'");
804ee07c ZJS	162	test_shell_maybe_quote_one("foo\nbar", ESCAPE_BACKSLASH, "\"foo\nbar\"");
2b99f645	163	test_shell_maybe_quote_one("foo\nbar", ESCAPE_BACKSLASH_ONELINE, "\"foo\\nbar\"");
804ee07c ZJS	164	test_shell_maybe_quote_one("foo\nbar", ESCAPE_POSIX, "$'foo\\nbar'");
804ee07c ZJS	165	test_shell_maybe_quote_one("foo \"bar\" waldo", ESCAPE_BACKSLASH, "\"foo \\\"bar\\\" waldo\"");
2b99f645	166	test_shell_maybe_quote_one("foo \"bar\" waldo", ESCAPE_BACKSLASH_ONELINE, "\"foo \\\"bar\\\" waldo\"");
804ee07c ZJS	167	test_shell_maybe_quote_one("foo \"bar\" waldo", ESCAPE_POSIX, "$'foo \"bar\" waldo'");
804ee07c ZJS	168	test_shell_maybe_quote_one("foo$bar", ESCAPE_BACKSLASH, "\"foo\\$bar\"");
2b99f645	169	test_shell_maybe_quote_one("foo$bar", ESCAPE_BACKSLASH_ONELINE, "\"foo\\$bar\"");
804ee07c ZJS	170	test_shell_maybe_quote_one("foo$bar", ESCAPE_POSIX, "$'foo$bar'");
	171
	172	/* Note that current users disallow control characters, so this "test"
	173	* is here merely to establish current behaviour. If control characters
	174	* were allowed, they should be quoted, i.e. \001 should become \\001. */
	175	test_shell_maybe_quote_one("a\nb\001", ESCAPE_BACKSLASH, "\"a\nb\001\"");
2b99f645	176	test_shell_maybe_quote_one("a\nb\001", ESCAPE_BACKSLASH_ONELINE, "\"a\\nb\001\"");
804ee07c ZJS	177	test_shell_maybe_quote_one("a\nb\001", ESCAPE_POSIX, "$'a\\nb\001'");
	178
	179	test_shell_maybe_quote_one("foo!bar", ESCAPE_BACKSLASH, "\"foo!bar\"");
2b99f645	180	test_shell_maybe_quote_one("foo!bar", ESCAPE_BACKSLASH_ONELINE, "\"foo!bar\"");
804ee07c	181	test_shell_maybe_quote_one("foo!bar", ESCAPE_POSIX, "$'foo!bar'");
45e0b1f6 RC	182	}
	183
	184	int main(int argc, char *argv[]) {
6d7c4033	185	test_setup_logging(LOG_DEBUG);
804ee07c	186
45e0b1f6	187	test_cescape();
70d55819 ZJS	188	test_xescape();
	189	test_xescape_full(false);
	190	test_xescape_full(true);
45e0b1f6 RC	191	test_cunescape();
	192	test_shell_escape();
	193	test_shell_maybe_quote();
	194
	195	return 0;
	196	}