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core: fix rlimit parsing

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* refuse limits if soft > hard
* print an actual value instead of (null)

see https://github.com/systemd/systemd/pull/1994#issuecomment-159999123
This commit is contained in:
Evgeny Vereshchagin
2015-11-27 11:26:37 +00:00
parent e0d8c8015a
commit 0316f2aeeb
2 changed files with 25 additions and 1 deletions
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src/core/load-fragment.c
+4 -1
View File
@@ -1173,6 +1173,7 @@ static int parse_rlimit_range(
struct rlimit **rl,
int (*rlim_parser)(const char *, rlim_t *)) {
const char *whole_value = value;
rlim_t soft, hard;
_cleanup_free_ char *sword = NULL, *hword = NULL;
int nwords, r;
@@ -1188,9 +1189,11 @@ static int parse_rlimit_range(
if (r == 0 && nwords == 2)
r = rlim_parser(hword, &hard);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse resource value, ignoring: %s", value);
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse resource value, ignoring: %s", whole_value);
return 0;
}
if (nwords == 2 && soft > hard)
return log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid resource value ("RLIM_FMT" > "RLIM_FMT"), ignoring: %s", soft, hard, whole_value);
if (!*rl) {
*rl = new(struct rlimit, 1);
src/test/test-unit-file.c
+21
View File
@@ -695,6 +695,27 @@ static void test_config_parse_rlimit(void) {
assert_se(rl[RLIMIT_NOFILE]->rlim_cur == RLIM_INFINITY);
assert_se(rl[RLIMIT_NOFILE]->rlim_cur == rl[RLIMIT_NOFILE]->rlim_max);
assert_se(config_parse_limit(NULL, "fake", 1, "section", 1, "LimitNOFILE", RLIMIT_NOFILE, "10:20:30", rl, NULL) >= 0);
assert_se(rl[RLIMIT_NOFILE]);
assert_se(rl[RLIMIT_NOFILE]->rlim_cur == 10);
assert_se(rl[RLIMIT_NOFILE]->rlim_max == 20);
/* Invalid values don't change rl */
assert_se(config_parse_limit(NULL, "fake", 1, "section", 1, "LimitNOFILE", RLIMIT_NOFILE, "wat:wat", rl, NULL) >= 0);
assert_se(rl[RLIMIT_NOFILE]);
assert_se(rl[RLIMIT_NOFILE]->rlim_cur == 10);
assert_se(rl[RLIMIT_NOFILE]->rlim_max == 20);
assert_se(config_parse_limit(NULL, "fake", 1, "section", 1, "LimitNOFILE", RLIMIT_NOFILE, "66:wat", rl, NULL) >= 0);
assert_se(rl[RLIMIT_NOFILE]);
assert_se(rl[RLIMIT_NOFILE]->rlim_cur == 10);
assert_se(rl[RLIMIT_NOFILE]->rlim_max == 20);
assert_se(config_parse_limit(NULL, "fake", 1, "section", 1, "LimitNOFILE", RLIMIT_NOFILE, "200:100", rl, NULL) >= 0);
assert_se(rl[RLIMIT_NOFILE]);
assert_se(rl[RLIMIT_NOFILE]->rlim_cur == 10);
assert_se(rl[RLIMIT_NOFILE]->rlim_max == 20);
rl[RLIMIT_NOFILE] = mfree(rl[RLIMIT_NOFILE]);
assert_se(config_parse_sec_limit(NULL, "fake", 1, "section", 1, "LimitCPU", RLIMIT_CPU, "56", rl, NULL) >= 0);