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shared/conf-parser,networkd: EXTRACT_UNQUOTE|EXTRACT_RETAIN_ESCAPE → EXTRACT_UNQUOTE

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It's hard to even say what exactly this combination means. Escaping is
necessary when quoting to have quotes within the string. So the escaping of
quote characters is inherently tied to quoting. When unquoting, it seems
natural to remove escaping which was done for the quoting purposes. But with
both flags we would be expected to re-add this escaping after unqouting? Or
maybe keep the escaping which is not necessary for quoting but otherwise
present? This all seems too complicated, let's just forbid such usage and
always fully unescape when unquoting.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2019-07-17 11:13:20 +02:00
parent fa8b675ae0
commit 8a07b4033e
4 changed files with 28 additions and 2 deletions
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2
src/basic/extract-word.c
View File

@ -28,6 +28,8 @@ int extract_first_word(const char **p, char **ret, const char *separators, Extra
assert(p);
assert(ret);
/* Those two don't make sense together. */
assert(!FLAGS_SET(flags, EXTRACT_UNQUOTE|EXTRACT_RETAIN_ESCAPE));
/* Bail early if called after last value or with no input */
if (!*p)

2
src/libsystemd-network/network-internal.c
View File

@ -254,7 +254,7 @@ int config_parse_match_strv(
for (;;) {
_cleanup_free_ char *word = NULL, *k = NULL;
r = extract_first_word(&p, &word, NULL, EXTRACT_UNQUOTE|EXTRACT_RETAIN_ESCAPE);
r = extract_first_word(&p, &word, NULL, EXTRACT_UNQUOTE);
if (r == 0)
return 0;
if (r == -ENOMEM)

2
src/shared/conf-parser.c
View File

@ -758,7 +758,7 @@ int config_parse_strv(
for (;;) {
char *word = NULL;
r = extract_first_word(&rvalue, &word, NULL, EXTRACT_UNQUOTE|EXTRACT_RETAIN_ESCAPE);
r = extract_first_word(&rvalue, &word, NULL, EXTRACT_UNQUOTE);
if (r == 0)
break;
if (r == -ENOMEM)

24
src/test/test-extract-word.c
View File

@ -83,6 +83,30 @@ static void test_extract_first_word(void) {
free(t);
assert_se(isempty(p));
p = original = "KEY=val \"KEY2=val with space\" \"KEY3=val with \\\"quotation\\\"\"";
assert_se(extract_first_word(&p, &t, NULL, EXTRACT_UNQUOTE) == 1);
assert_se(streq(t, "KEY=val"));
free(t);
assert_se(extract_first_word(&p, &t, NULL, EXTRACT_UNQUOTE) == 1);
assert_se(streq(t, "KEY2=val with space"));
free(t);
assert_se(extract_first_word(&p, &t, NULL, EXTRACT_UNQUOTE) == 1);
assert_se(streq(t, "KEY3=val with \"quotation\""));
free(t);
assert_se(isempty(p));
p = original = "KEY=val \"KEY2=val space\" \"KEY3=val with \\\"quotation\\\"\"";
assert_se(extract_first_word(&p, &t, NULL, EXTRACT_RETAIN_ESCAPE) == 1);
assert_se(streq(t, "KEY=val"));
free(t);
assert_se(extract_first_word(&p, &t, NULL, EXTRACT_RETAIN_ESCAPE) == 1);
assert_se(streq(t, "\"KEY2=val"));
free(t);
assert_se(extract_first_word(&p, &t, NULL, EXTRACT_RETAIN_ESCAPE) == 1);
assert_se(streq(t, "space\""));
free(t);
assert_se(startswith(p, "\"KEY3="));
p = original = "\'fooo";
assert_se(extract_first_word(&p, &t, NULL, EXTRACT_UNQUOTE) == -EINVAL);
assert_se(p == original + 5);