1 | /* Copyright (C) 2018-2022 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <errno.h> |
19 | #include <stdio.h> |
20 | #include <sys/resource.h> |
21 | #include <support/check.h> |
22 | |
23 | static int resources[] = { |
24 | /* The following 7 limits are part of POSIX and must exist. */ |
25 | RLIMIT_CORE, |
26 | RLIMIT_CPU, |
27 | RLIMIT_DATA, |
28 | RLIMIT_FSIZE, |
29 | RLIMIT_NOFILE, |
30 | RLIMIT_STACK, |
31 | RLIMIT_AS |
32 | }; |
33 | |
34 | #define nresources (sizeof (resources) / sizeof (resources[0])) |
35 | |
36 | /* Assume that the prlimit64 function calls the prlimit64 syscall without |
37 | mangling the arguments. */ |
38 | #define PRLIMIT64_INFINITY ((rlim64_t) -1) |
39 | |
40 | /* As we don't know which limit will be modified, use a sufficiently high |
41 | value to not shoot ourself in the foot. Use a 32-bit value to test |
42 | both the 32- and 64-bit versions, and keep the highest bit clear to |
43 | avoid sign extension. */ |
44 | #define PRLIMIT64_TESTVAL ((rlim64_t) 0x42420000) |
45 | |
46 | static void |
47 | test_getrlimit (int resource, rlim_t exp_cur, rlim_t exp_max) |
48 | { |
49 | struct rlimit r; |
50 | TEST_VERIFY_EXIT (getrlimit (resource, &r) == 0); |
51 | TEST_COMPARE (r.rlim_cur, exp_cur); |
52 | TEST_COMPARE (r.rlim_max, exp_max); |
53 | } |
54 | |
55 | static void |
56 | test_getrlimit64 (int resource, rlim64_t exp_cur, rlim64_t exp_max) |
57 | { |
58 | struct rlimit64 r; |
59 | TEST_VERIFY_EXIT (getrlimit64 (resource, &r) == 0); |
60 | TEST_COMPARE (r.rlim_cur, exp_cur); |
61 | TEST_COMPARE (r.rlim_max, exp_max); |
62 | } |
63 | |
64 | static void |
65 | test_prlimit_get (int resource, rlim_t exp_cur, rlim_t exp_max) |
66 | { |
67 | struct rlimit r; |
68 | TEST_VERIFY_EXIT (prlimit (0, resource, NULL, &r) == 0); |
69 | TEST_COMPARE (r.rlim_cur, exp_cur); |
70 | TEST_COMPARE (r.rlim_max, exp_max); |
71 | } |
72 | |
73 | static void |
74 | test_prlimit64_get (int resource, rlim64_t exp_cur, rlim64_t exp_max) |
75 | { |
76 | struct rlimit64 r; |
77 | TEST_COMPARE (prlimit64 (0, resource, NULL, &r), 0); |
78 | TEST_COMPARE (r.rlim_cur, exp_cur); |
79 | TEST_COMPARE (r.rlim_max, exp_max); |
80 | } |
81 | |
82 | static void |
83 | test_setrlimit (int resource, rlim_t new_cur, rlim_t new_max) |
84 | { |
85 | struct rlimit r = { new_cur, new_max }; |
86 | TEST_COMPARE (setrlimit (resource, &r), 0); |
87 | } |
88 | |
89 | static void |
90 | test_setrlimit64 (int resource, rlim64_t new_cur, rlim64_t new_max) |
91 | { |
92 | struct rlimit64 r = { new_cur, new_max }; |
93 | TEST_COMPARE (setrlimit64 (resource, &r), 0); |
94 | } |
95 | |
96 | static void |
97 | test_prlimit_set (int resource, rlim_t new_cur, rlim_t new_max) |
98 | { |
99 | struct rlimit r = { new_cur, new_max }; |
100 | TEST_COMPARE (prlimit (0, resource, &r, NULL), 0); |
101 | } |
102 | |
103 | static void |
104 | test_prlimit64_set (int resource, rlim64_t new_cur, rlim64_t new_max) |
105 | { |
106 | struct rlimit64 r = { new_cur, new_max }; |
107 | TEST_COMPARE (prlimit64 (0, resource, &r, NULL), 0); |
108 | } |
109 | |
110 | static int |
111 | do_test (void) |
112 | { |
113 | int resource = -1; |
114 | |
115 | /* Find a resource with hard limit set to infinity, so that the soft limit |
116 | can be manipulated to any value. */ |
117 | for (int i = 0; i < nresources; ++i) |
118 | { |
119 | struct rlimit64 r64; |
120 | int res = prlimit64 (pid: 0, resource: resources[i], NULL, old_limit: &r64); |
121 | if ((res == 0) && (r64.rlim_max == PRLIMIT64_INFINITY)) |
122 | { |
123 | resource = resources[i]; |
124 | break; |
125 | } |
126 | } |
127 | |
128 | if (resource == -1) |
129 | FAIL_UNSUPPORTED |
130 | ("Could not find and limit with hard limit set to infinity." ); |
131 | |
132 | /* First check that the get functions work correctly with the test value. */ |
133 | test_prlimit64_set (resource, PRLIMIT64_TESTVAL, PRLIMIT64_INFINITY); |
134 | test_getrlimit (resource, PRLIMIT64_TESTVAL, RLIM_INFINITY); |
135 | test_getrlimit64 (resource, PRLIMIT64_TESTVAL, RLIM64_INFINITY); |
136 | test_prlimit_get (resource, PRLIMIT64_TESTVAL, RLIM_INFINITY); |
137 | test_prlimit64_get (resource, PRLIMIT64_TESTVAL, RLIM64_INFINITY); |
138 | |
139 | /* Then check that the get functions work correctly with infinity. */ |
140 | test_prlimit64_set (resource, PRLIMIT64_INFINITY, PRLIMIT64_INFINITY); |
141 | test_getrlimit (resource, RLIM_INFINITY, RLIM_INFINITY); |
142 | test_getrlimit64 (resource, RLIM64_INFINITY, RLIM64_INFINITY); |
143 | test_prlimit_get (resource, RLIM_INFINITY, RLIM_INFINITY); |
144 | test_prlimit64_get (resource, RLIM64_INFINITY, RLIM64_INFINITY); |
145 | |
146 | /* Then check that setrlimit works correctly with the test value. */ |
147 | test_setrlimit (resource, PRLIMIT64_TESTVAL, RLIM_INFINITY); |
148 | test_prlimit64_get (resource, PRLIMIT64_TESTVAL, PRLIMIT64_INFINITY); |
149 | |
150 | /* Then check that setrlimit works correctly with infinity. */ |
151 | test_setrlimit (resource, RLIM_INFINITY, RLIM_INFINITY); |
152 | test_prlimit64_get (resource, PRLIMIT64_INFINITY, PRLIMIT64_INFINITY); |
153 | |
154 | /* Then check that setrlimit64 works correctly with the test value. */ |
155 | test_setrlimit64 (resource, PRLIMIT64_TESTVAL, RLIM64_INFINITY); |
156 | test_prlimit64_get (resource, PRLIMIT64_TESTVAL, PRLIMIT64_INFINITY); |
157 | |
158 | /* Then check that setrlimit64 works correctly with infinity. */ |
159 | test_setrlimit64 (resource, RLIM64_INFINITY, RLIM64_INFINITY); |
160 | test_prlimit64_get (resource, PRLIMIT64_INFINITY, PRLIMIT64_INFINITY); |
161 | |
162 | /* Then check that prlimit works correctly with the test value. */ |
163 | test_prlimit_set (resource, RLIM_INFINITY, RLIM_INFINITY); |
164 | test_prlimit64_get (resource, PRLIMIT64_INFINITY, PRLIMIT64_INFINITY); |
165 | |
166 | /* Finally check that prlimit works correctly with infinity. */ |
167 | test_prlimit_set (resource, PRLIMIT64_TESTVAL, RLIM_INFINITY); |
168 | test_prlimit64_get (resource, PRLIMIT64_TESTVAL, PRLIMIT64_INFINITY); |
169 | |
170 | return 0; |
171 | } |
172 | |
173 | #include <support/test-driver.c> |
174 | |