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util: New flag UNQUOTE_UNESCAPE_RELAX for unquote_first_word

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The new flag UNQUOTE_UNESCAPE_RELAX preserves unrecognized escape
sequences verbatim in unquote_first_word, either when it's a trailing
backslash (similar to UNQUOTE_RELAX, but in this case keep the extra
backslash in the output) or in the middle of a sequence string.

Add unit test cases to ensure the new flag works as expected and to
prevent regressions from being introduced.

Tested with a follow up commit converting config_parse_exec() to start
using unquote_first_word, in which case this flags makes it possible to
preserve unrecognized escape sequences.

Relevant bug: https://bugs.freedesktop.org/show_bug.cgi?id=90794
This commit is contained in:
Filipe Brandenburger
2015-06-17 11:12:11 -07:00
parent 05654e712f
commit d6293c070e
3 changed files with 120 additions and 6 deletions
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src/test/test-util.c
+94
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@@ -1304,6 +1304,100 @@ static void test_unquote_first_word(void) {
assert_se(streq(t, "pi\360\237\222\251le"));
free(t);
assert_se(p == original + 32);
p = original = "fooo\\";
assert_se(unquote_first_word(&p, &t, UNQUOTE_RELAX) > 0);
assert_se(streq(t, "fooo"));
free(t);
assert_se(p == original + 5);
p = original = "fooo\\";
assert_se(unquote_first_word(&p, &t, UNQUOTE_CUNESCAPE_RELAX) > 0);
assert_se(streq(t, "fooo\\"));
free(t);
assert_se(p == original + 5);
p = original = "fooo\\";
assert_se(unquote_first_word(&p, &t, UNQUOTE_CUNESCAPE_RELAX|UNQUOTE_RELAX) > 0);
assert_se(streq(t, "fooo\\"));
free(t);
assert_se(p == original + 5);
p = original = "fooo\\";
assert_se(unquote_first_word(&p, &t, UNQUOTE_CUNESCAPE|UNQUOTE_CUNESCAPE_RELAX) > 0);
assert_se(streq(t, "fooo\\"));
free(t);
assert_se(p == original + 5);
p = original = "\"foo\\";
assert_se(unquote_first_word(&p, &t, 0) == -EINVAL);
assert_se(p == original + 5);
p = original = "\"foo\\";
assert_se(unquote_first_word(&p, &t, UNQUOTE_RELAX) > 0);
assert_se(streq(t, "foo"));
free(t);
assert_se(p == original + 5);
p = original = "\"foo\\";
assert_se(unquote_first_word(&p, &t, UNQUOTE_CUNESCAPE_RELAX) == -EINVAL);
assert_se(p == original + 5);
p = original = "\"foo\\";
assert_se(unquote_first_word(&p, &t, UNQUOTE_CUNESCAPE_RELAX|UNQUOTE_RELAX) > 0);
assert_se(streq(t, "foo\\"));
free(t);
assert_se(p == original + 5);
p = original = "\"foo\\";
assert_se(unquote_first_word(&p, &t, UNQUOTE_CUNESCAPE|UNQUOTE_CUNESCAPE_RELAX|UNQUOTE_RELAX) > 0);
assert_se(streq(t, "foo\\"));
free(t);
assert_se(p == original + 5);
p = original = "fooo\\ bar quux";
assert_se(unquote_first_word(&p, &t, UNQUOTE_RELAX) > 0);
assert_se(streq(t, "fooo bar"));
free(t);
assert_se(p == original + 10);
p = original = "fooo\\ bar quux";
assert_se(unquote_first_word(&p, &t, UNQUOTE_CUNESCAPE_RELAX) > 0);
assert_se(streq(t, "fooo bar"));
free(t);
assert_se(p == original + 10);
p = original = "fooo\\ bar quux";
assert_se(unquote_first_word(&p, &t, UNQUOTE_CUNESCAPE_RELAX|UNQUOTE_RELAX) > 0);
assert_se(streq(t, "fooo bar"));
free(t);
assert_se(p == original + 10);
p = original = "fooo\\ bar quux";
assert_se(unquote_first_word(&p, &t, UNQUOTE_CUNESCAPE) == -EINVAL);
assert_se(p == original + 5);
p = original = "fooo\\ bar quux";
assert_se(unquote_first_word(&p, &t, UNQUOTE_CUNESCAPE|UNQUOTE_CUNESCAPE_RELAX) > 0);
assert_se(streq(t, "fooo\\ bar"));
free(t);
assert_se(p == original + 10);
p = original = "\\w+@\\K[\\d.]+";
assert_se(unquote_first_word(&p, &t, UNQUOTE_CUNESCAPE) == -EINVAL);
assert_se(p == original + 1);
p = original = "\\w+@\\K[\\d.]+";
assert_se(unquote_first_word(&p, &t, UNQUOTE_CUNESCAPE|UNQUOTE_CUNESCAPE_RELAX) > 0);
assert_se(streq(t, "\\w+@\\K[\\d.]+"));
free(t);
assert_se(p == original + 12);
p = original = "\\w+\\b";
assert_se(unquote_first_word(&p, &t, UNQUOTE_CUNESCAPE|UNQUOTE_CUNESCAPE_RELAX) > 0);
assert_se(streq(t, "\\w+\b"));
free(t);
assert_se(p == original + 5);
}
static void test_unquote_many_words(void) {