1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <sys/resource.h>
#if HAVE_VALGRIND_VALGRIND_H
#include <valgrind/valgrind.h>
#endif
#include "alloc-util.h"
#include "capability-util.h"
#include "macro.h"
#include "missing_resource.h"
#include "process-util.h"
#include "rlimit-util.h"
#include "string-util.h"
#include "tests.h"
#include "time-util.h"
#include "user-util.h"
static void test_rlimit_parse_format_one(int resource, const char *string, rlim_t soft, rlim_t hard, int ret, const char *formatted) {
_cleanup_free_ char *f = NULL;
struct rlimit rl = {
.rlim_cur = 4711,
.rlim_max = 4712,
}, rl2 = {
.rlim_cur = 4713,
.rlim_max = 4714
};
assert_se(rlimit_parse(resource, string, &rl) == ret);
if (ret < 0)
return;
assert_se(rl.rlim_cur == soft);
assert_se(rl.rlim_max == hard);
assert_se(rlimit_format(&rl, &f) >= 0);
ASSERT_STREQ(formatted, f);
assert_se(rlimit_parse(resource, formatted, &rl2) >= 0);
assert_se(memcmp(&rl, &rl2, sizeof(struct rlimit)) == 0);
}
TEST(rlimit_parse_format) {
test_rlimit_parse_format_one(RLIMIT_NOFILE, "4:5", 4, 5, 0, "4:5");
test_rlimit_parse_format_one(RLIMIT_NOFILE, "6", 6, 6, 0, "6");
test_rlimit_parse_format_one(RLIMIT_NOFILE, "infinity", RLIM_INFINITY, RLIM_INFINITY, 0, "infinity");
test_rlimit_parse_format_one(RLIMIT_NOFILE, "infinity:infinity", RLIM_INFINITY, RLIM_INFINITY, 0, "infinity");
test_rlimit_parse_format_one(RLIMIT_NOFILE, "8:infinity", 8, RLIM_INFINITY, 0, "8:infinity");
test_rlimit_parse_format_one(RLIMIT_CPU, "25min:13h", (25*USEC_PER_MINUTE) / USEC_PER_SEC, (13*USEC_PER_HOUR) / USEC_PER_SEC, 0, "1500:46800");
test_rlimit_parse_format_one(RLIMIT_NOFILE, "", 0, 0, -EINVAL, NULL);
test_rlimit_parse_format_one(RLIMIT_NOFILE, "5:4", 0, 0, -EILSEQ, NULL);
test_rlimit_parse_format_one(RLIMIT_NOFILE, "5:4:3", 0, 0, -EINVAL, NULL);
test_rlimit_parse_format_one(RLIMIT_NICE, "20", 20, 20, 0, "20");
test_rlimit_parse_format_one(RLIMIT_NICE, "40", 40, 40, 0, "40");
test_rlimit_parse_format_one(RLIMIT_NICE, "41", 41, 41, -ERANGE, "41");
test_rlimit_parse_format_one(RLIMIT_NICE, "0", 0, 0, 0, "0");
test_rlimit_parse_format_one(RLIMIT_NICE, "-7", 27, 27, 0, "27");
test_rlimit_parse_format_one(RLIMIT_NICE, "-20", 40, 40, 0, "40");
test_rlimit_parse_format_one(RLIMIT_NICE, "-21", 41, 41, -ERANGE, "41");
test_rlimit_parse_format_one(RLIMIT_NICE, "-0", 20, 20, 0, "20");
test_rlimit_parse_format_one(RLIMIT_NICE, "+7", 13, 13, 0, "13");
test_rlimit_parse_format_one(RLIMIT_NICE, "+19", 1, 1, 0, "1");
test_rlimit_parse_format_one(RLIMIT_NICE, "+20", 0, 0, -ERANGE, "0");
test_rlimit_parse_format_one(RLIMIT_NICE, "+0", 20, 20, 0, "20");
}
TEST(rlimit_from_string) {
assert_se(rlimit_from_string("NOFILE") == RLIMIT_NOFILE);
assert_se(rlimit_from_string("LimitNOFILE") == -EINVAL);
assert_se(rlimit_from_string("RLIMIT_NOFILE") == -EINVAL);
assert_se(rlimit_from_string("xxxNOFILE") == -EINVAL);
assert_se(rlimit_from_string("DefaultLimitNOFILE") == -EINVAL);
}
TEST(rlimit_from_string_harder) {
assert_se(rlimit_from_string_harder("NOFILE") == RLIMIT_NOFILE);
assert_se(rlimit_from_string_harder("LimitNOFILE") == RLIMIT_NOFILE);
assert_se(rlimit_from_string_harder("RLIMIT_NOFILE") == RLIMIT_NOFILE);
assert_se(rlimit_from_string_harder("xxxNOFILE") == -EINVAL);
assert_se(rlimit_from_string_harder("DefaultLimitNOFILE") == -EINVAL);
}
TEST(rlimit_to_string_all) {
for (int i = 0; i < _RLIMIT_MAX; i++) {
_cleanup_free_ char *prefixed = NULL;
const char *p;
assert_se(p = rlimit_to_string(i));
log_info("%i = %s", i, p);
assert_se(rlimit_from_string(p) == i);
assert_se(rlimit_from_string_harder(p) == i);
assert_se(prefixed = strjoin("Limit", p));
assert_se(rlimit_from_string(prefixed) < 0);
assert_se(rlimit_from_string_harder(prefixed) == i);
prefixed = mfree(prefixed);
assert_se(prefixed = strjoin("RLIMIT_", p));
assert_se(rlimit_from_string(prefixed) < 0);
assert_se(rlimit_from_string_harder(prefixed) == i);
}
}
TEST(setrlimit) {
struct rlimit old, new, high;
struct rlimit err = {
.rlim_cur = 10,
.rlim_max = 5,
};
assert_se(drop_capability(CAP_SYS_RESOURCE) == 0);
assert_se(getrlimit(RLIMIT_NOFILE, &old) == 0);
new.rlim_cur = MIN(5U, old.rlim_max);
new.rlim_max = old.rlim_max;
assert_se(setrlimit(RLIMIT_NOFILE, &new) >= 0);
ASSERT_STREQ(rlimit_to_string(RLIMIT_NOFILE), "NOFILE");
ASSERT_NULL(rlimit_to_string(-1));
assert_se(getrlimit(RLIMIT_NOFILE, &old) == 0);
assert_se(setrlimit_closest(RLIMIT_NOFILE, &old) == 0);
assert_se(getrlimit(RLIMIT_NOFILE, &new) == 0);
assert_se(old.rlim_cur == new.rlim_cur);
assert_se(old.rlim_max == new.rlim_max);
assert_se(getrlimit(RLIMIT_NOFILE, &old) == 0);
high = RLIMIT_MAKE_CONST(old.rlim_max == RLIM_INFINITY ? old.rlim_max : old.rlim_max + 1);
assert_se(setrlimit_closest(RLIMIT_NOFILE, &high) == 0);
assert_se(getrlimit(RLIMIT_NOFILE, &new) == 0);
assert_se(new.rlim_max == old.rlim_max);
assert_se(new.rlim_cur == new.rlim_max);
assert_se(getrlimit(RLIMIT_NOFILE, &old) == 0);
assert_se(setrlimit_closest(RLIMIT_NOFILE, &err) == -EINVAL);
assert_se(getrlimit(RLIMIT_NOFILE, &new) == 0);
assert_se(old.rlim_cur == new.rlim_cur);
assert_se(old.rlim_max == new.rlim_max);
}
TEST(pid_getrlimit) {
int r;
/* We fork off a child and read the parent's resource limit from there (i.e. our own), and compare
* with what getrlimit() gives us */
for (int resource = 0; resource < _RLIMIT_MAX; resource++) {
struct rlimit direct;
assert_se(getrlimit(resource, &direct) >= 0);
/* We fork off a child so that getrlimit() doesn't work anymore */
r = safe_fork("(getrlimit)", FORK_RESET_SIGNALS|FORK_DEATHSIG_SIGKILL|FORK_LOG|FORK_WAIT, /* ret_pid= */ NULL);
assert_se(r >= 0);
if (r == 0) {
struct rlimit indirect;
/* child */
/* Drop privs, so that prlimit() doesn't work anymore */
(void) setresgid(GID_NOBODY, GID_NOBODY, GID_NOBODY);
(void) setresuid(UID_NOBODY, UID_NOBODY, UID_NOBODY);
assert_se(pid_getrlimit(getppid(), resource, &indirect) >= 0);
#if HAVE_VALGRIND_VALGRIND_H
/* Valgrind fakes some changes in RLIMIT_NOFILE getrlimit() returns, work around that */
if (RUNNING_ON_VALGRIND && resource == RLIMIT_NOFILE) {
log_info("Skipping pid_getrlimit() check for RLIMIT_NOFILE, running in valgrind");
_exit(EXIT_SUCCESS);
}
#endif
assert_se(direct.rlim_cur == indirect.rlim_cur);
assert_se(direct.rlim_max == indirect.rlim_max);
_exit(EXIT_SUCCESS);
}
}
}
DEFINE_TEST_MAIN(LOG_INFO);
|
