summaryrefslogtreecommitdiff
path: root/src/test/test-execute.c
blob: 90540b884bf8ef78df6064d1baf9ac7145e5ddfb (plain)
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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
/***
  This file is part of systemd.

  Copyright 2014 Ronny Chevalier

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include <grp.h>
#include <pwd.h>
#include <stdio.h>
#include <sys/prctl.h>
#include <sys/types.h>

#include "fileio.h"
#include "fs-util.h"
#include "macro.h"
#include "manager.h"
#include "mkdir.h"
#include "path-util.h"
#include "rm-rf.h"
#ifdef HAVE_SECCOMP
#include "seccomp-util.h"
#endif
#include "stat-util.h"
#include "test-helper.h"
#include "tests.h"
#include "unit.h"
#include "util.h"
#include "virt.h"

typedef void (*test_function_t)(Manager *m);

static void check(Manager *m, Unit *unit, int status_expected, int code_expected) {
        Service *service = NULL;
        usec_t ts;
        usec_t timeout = 2 * USEC_PER_SEC;

        assert_se(m);
        assert_se(unit);

        service = SERVICE(unit);
        printf("%s\n", unit->id);
        exec_context_dump(&service->exec_context, stdout, "\t");
        ts = now(CLOCK_MONOTONIC);
        while (service->state != SERVICE_DEAD && service->state != SERVICE_FAILED) {
                int r;
                usec_t n;

                r = sd_event_run(m->event, 100 * USEC_PER_MSEC);
                assert_se(r >= 0);

                n = now(CLOCK_MONOTONIC);
                if (ts + timeout < n) {
                        log_error("Test timeout when testing %s", unit->id);
                        exit(EXIT_FAILURE);
                }
        }
        exec_status_dump(&service->main_exec_status, stdout, "\t");
        assert_se(service->main_exec_status.status == status_expected);
        assert_se(service->main_exec_status.code == code_expected);
}

static bool is_inaccessible_available(void) {
        char *p;

        FOREACH_STRING(p,
                "/run/systemd/inaccessible/reg",
                "/run/systemd/inaccessible/dir",
                "/run/systemd/inaccessible/chr",
                "/run/systemd/inaccessible/blk",
                "/run/systemd/inaccessible/fifo",
                "/run/systemd/inaccessible/sock"
        ) {
                if (access(p, F_OK) < 0)
                        return false;
        }

        return true;
}

static void test(Manager *m, const char *unit_name, int status_expected, int code_expected) {
        Unit *unit;

        assert_se(unit_name);

        assert_se(manager_load_unit(m, unit_name, NULL, NULL, &unit) >= 0);
        assert_se(UNIT_VTABLE(unit)->start(unit) >= 0);
        check(m, unit, status_expected, code_expected);
}

static void test_exec_workingdirectory(Manager *m) {
        assert_se(mkdir_p("/tmp/test-exec_workingdirectory", 0755) >= 0);

        test(m, "exec-workingdirectory.service", 0, CLD_EXITED);

        (void) rm_rf("/tmp/test-exec_workingdirectory", REMOVE_ROOT|REMOVE_PHYSICAL);
}

static void test_exec_personality(Manager *m) {
#if defined(__x86_64__)
        test(m, "exec-personality-x86-64.service", 0, CLD_EXITED);

#elif defined(__s390__)
        test(m, "exec-personality-s390.service", 0, CLD_EXITED);

#elif defined(__powerpc64__)
#  if __BYTE_ORDER == __BIG_ENDIAN
        test(m, "exec-personality-ppc64.service", 0, CLD_EXITED);
#  else
        test(m, "exec-personality-ppc64le.service", 0, CLD_EXITED);
#  endif

#elif defined(__aarch64__)
        test(m, "exec-personality-aarch64.service", 0, CLD_EXITED);

#elif defined(__i386__)
        test(m, "exec-personality-x86.service", 0, CLD_EXITED);
#endif
}

static void test_exec_ignoresigpipe(Manager *m) {
        test(m, "exec-ignoresigpipe-yes.service", 0, CLD_EXITED);
        test(m, "exec-ignoresigpipe-no.service", SIGPIPE, CLD_KILLED);
}

static void test_exec_privatetmp(Manager *m) {
        assert_se(touch("/tmp/test-exec_privatetmp") >= 0);

        test(m, "exec-privatetmp-yes.service", 0, CLD_EXITED);
        test(m, "exec-privatetmp-no.service", 0, CLD_EXITED);

        unlink("/tmp/test-exec_privatetmp");
}

static void test_exec_privatedevices(Manager *m) {
        if (detect_container() > 0) {
                log_notice("testing in container, skipping %s", __func__);
                return;
        }
        if (!is_inaccessible_available()) {
                log_notice("testing without inaccessible, skipping %s", __func__);
                return;
        }

        test(m, "exec-privatedevices-yes.service", 0, CLD_EXITED);
        test(m, "exec-privatedevices-no.service", 0, CLD_EXITED);
}

static void test_exec_privatedevices_capabilities(Manager *m) {
        int r;

        if (detect_container() > 0) {
                log_notice("testing in container, skipping %s", __func__);
                return;
        }
        if (!is_inaccessible_available()) {
                log_notice("testing without inaccessible, skipping %s", __func__);
                return;
        }

        /* We use capsh to test if the capabilities are
         * properly set, so be sure that it exists */
        r = find_binary("capsh", NULL);
        if (r < 0) {
                log_error_errno(r, "Skipping %s, could not find capsh binary: %m", __func__);
                return;
        }

        test(m, "exec-privatedevices-yes-capability-mknod.service", 0, CLD_EXITED);
        test(m, "exec-privatedevices-no-capability-mknod.service", 0, CLD_EXITED);
        test(m, "exec-privatedevices-yes-capability-sys-rawio.service", 0, CLD_EXITED);
        test(m, "exec-privatedevices-no-capability-sys-rawio.service", 0, CLD_EXITED);
}

static void test_exec_protectkernelmodules(Manager *m) {
        int r;

        if (detect_container() > 0) {
                log_notice("testing in container, skipping %s", __func__);
                return;
        }
        if (!is_inaccessible_available()) {
                log_notice("testing without inaccessible, skipping %s", __func__);
                return;
        }

        r = find_binary("capsh", NULL);
        if (r < 0) {
                log_error_errno(r, "Skipping %s, could not find capsh binary: %m", __func__);
                return;
        }


        test(m, "exec-protectkernelmodules-no-capabilities.service", 0, CLD_EXITED);
        test(m, "exec-protectkernelmodules-yes-capabilities.service", 0, CLD_EXITED);
        test(m, "exec-protectkernelmodules-yes-mount-propagation.service", 0, CLD_EXITED);
}

static void test_exec_readonlypaths(Manager *m) {

        if (path_is_read_only_fs("/var") > 0)
                return;

        test(m, "exec-readonlypaths.service", 0, CLD_EXITED);
        test(m, "exec-readonlypaths-mount-propagation.service", 0, CLD_EXITED);
}

static void test_exec_readwritepaths(Manager *m) {

        if (path_is_read_only_fs("/") > 0)
                return;

        test(m, "exec-readwritepaths-mount-propagation.service", 0, CLD_EXITED);
}

static void test_exec_inaccessiblepaths(Manager *m) {

        if (path_is_read_only_fs("/") > 0)
                return;

        test(m, "exec-inaccessiblepaths-mount-propagation.service", 0, CLD_EXITED);
}

static void test_exec_systemcallfilter(Manager *m) {
#ifdef HAVE_SECCOMP
        if (!is_seccomp_available())
                return;
        test(m, "exec-systemcallfilter-not-failing.service", 0, CLD_EXITED);
        test(m, "exec-systemcallfilter-not-failing2.service", 0, CLD_EXITED);
        test(m, "exec-systemcallfilter-failing.service", SIGSYS, CLD_KILLED);
        test(m, "exec-systemcallfilter-failing2.service", SIGSYS, CLD_KILLED);

#endif
}

static void test_exec_systemcallerrornumber(Manager *m) {
#ifdef HAVE_SECCOMP
        if (is_seccomp_available())
                test(m, "exec-systemcallerrornumber.service", 1, CLD_EXITED);
#endif
}

static void test_exec_restrict_namespaces(Manager *m) {
#ifdef HAVE_SECCOMP
        if (!is_seccomp_available())
                return;

        test(m, "exec-restrict-namespaces-no.service", 0, CLD_EXITED);
        test(m, "exec-restrict-namespaces-yes.service", 1, CLD_EXITED);
        test(m, "exec-restrict-namespaces-mnt.service", 0, CLD_EXITED);
        test(m, "exec-restrict-namespaces-mnt-blacklist.service", 1, CLD_EXITED);
#endif
}

static void test_exec_systemcall_system_mode_with_user(Manager *m) {
#ifdef HAVE_SECCOMP
        if (!is_seccomp_available())
                return;
        if (getpwnam("nobody"))
                test(m, "exec-systemcallfilter-system-user.service", 0, CLD_EXITED);
        else if (getpwnam("nfsnobody"))
                test(m, "exec-systemcallfilter-system-user-nfsnobody.service", 0, CLD_EXITED);
        else
                log_error_errno(errno, "Skipping %s, could not find nobody/nfsnobody user: %m", __func__);
#endif
}

static void test_exec_user(Manager *m) {
        if (getpwnam("nobody"))
                test(m, "exec-user.service", 0, CLD_EXITED);
        else if (getpwnam("nfsnobody"))
                test(m, "exec-user-nfsnobody.service", 0, CLD_EXITED);
        else
                log_error_errno(errno, "Skipping %s, could not find nobody/nfsnobody user: %m", __func__);
}

static void test_exec_group(Manager *m) {
        if (getgrnam("nobody"))
                test(m, "exec-group.service", 0, CLD_EXITED);
        else if (getgrnam("nfsnobody"))
                test(m, "exec-group-nfsnobody.service", 0, CLD_EXITED);
        else
                log_error_errno(errno, "Skipping %s, could not find nobody/nfsnobody group: %m", __func__);
}

static void test_exec_supplementary_groups(Manager *m) {
        test(m, "exec-supplementarygroups.service", 0, CLD_EXITED);
        test(m, "exec-supplementarygroups-single-group.service", 0, CLD_EXITED);
        test(m, "exec-supplementarygroups-single-group-user.service", 0, CLD_EXITED);
        test(m, "exec-supplementarygroups-multiple-groups-default-group-user.service", 0, CLD_EXITED);
        test(m, "exec-supplementarygroups-multiple-groups-withgid.service", 0, CLD_EXITED);
        test(m, "exec-supplementarygroups-multiple-groups-withuid.service", 0, CLD_EXITED);
}

static void test_exec_dynamic_user(Manager *m) {
        test(m, "exec-dynamicuser-fixeduser.service", 0, CLD_EXITED);
        test(m, "exec-dynamicuser-fixeduser-one-supplementarygroup.service", 0, CLD_EXITED);
        test(m, "exec-dynamicuser-supplementarygroups.service", 0, CLD_EXITED);
}

static void test_exec_environment(Manager *m) {
        test(m, "exec-environment.service", 0, CLD_EXITED);
        test(m, "exec-environment-multiple.service", 0, CLD_EXITED);
        test(m, "exec-environment-empty.service", 0, CLD_EXITED);
}

static void test_exec_environmentfile(Manager *m) {
        static const char e[] =
                "VAR1='word1 word2'\n"
                "VAR2=word3 \n"
                "# comment1\n"
                "\n"
                "; comment2\n"
                " ; # comment3\n"
                "line without an equal\n"
                "VAR3='$word 5 6'\n";
        int r;

        r = write_string_file("/tmp/test-exec_environmentfile.conf", e, WRITE_STRING_FILE_CREATE);
        assert_se(r == 0);

        test(m, "exec-environmentfile.service", 0, CLD_EXITED);

        unlink("/tmp/test-exec_environmentfile.conf");
}

static void test_exec_passenvironment(Manager *m) {
        /* test-execute runs under MANAGER_USER which, by default, forwards all
         * variables present in the environment, but only those that are
         * present _at the time it is created_!
         *
         * So these PassEnvironment checks are still expected to work, since we
         * are ensuring the variables are not present at manager creation (they
         * are unset explicitly in main) and are only set here.
         *
         * This is still a good approximation of how a test for MANAGER_SYSTEM
         * would work.
         */
        assert_se(setenv("VAR1", "word1 word2", 1) == 0);
        assert_se(setenv("VAR2", "word3", 1) == 0);
        assert_se(setenv("VAR3", "$word 5 6", 1) == 0);
        test(m, "exec-passenvironment.service", 0, CLD_EXITED);
        test(m, "exec-passenvironment-repeated.service", 0, CLD_EXITED);
        test(m, "exec-passenvironment-empty.service", 0, CLD_EXITED);
        assert_se(unsetenv("VAR1") == 0);
        assert_se(unsetenv("VAR2") == 0);
        assert_se(unsetenv("VAR3") == 0);
        test(m, "exec-passenvironment-absent.service", 0, CLD_EXITED);
}

static void test_exec_umask(Manager *m) {
        test(m, "exec-umask-default.service", 0, CLD_EXITED);
        test(m, "exec-umask-0177.service", 0, CLD_EXITED);
}

static void test_exec_runtimedirectory(Manager *m) {
        test(m, "exec-runtimedirectory.service", 0, CLD_EXITED);
        test(m, "exec-runtimedirectory-mode.service", 0, CLD_EXITED);
        if (getgrnam("nobody"))
                test(m, "exec-runtimedirectory-owner.service", 0, CLD_EXITED);
        else if (getgrnam("nfsnobody"))
                test(m, "exec-runtimedirectory-owner-nfsnobody.service", 0, CLD_EXITED);
        else
                log_error_errno(errno, "Skipping %s, could not find nobody/nfsnobody group: %m", __func__);
}

static void test_exec_capabilityboundingset(Manager *m) {
        int r;

        r = find_binary("capsh", NULL);
        if (r < 0) {
                log_error_errno(r, "Skipping %s, could not find capsh binary: %m", __func__);
                return;
        }

        test(m, "exec-capabilityboundingset-simple.service", 0, CLD_EXITED);
        test(m, "exec-capabilityboundingset-reset.service", 0, CLD_EXITED);
        test(m, "exec-capabilityboundingset-merge.service", 0, CLD_EXITED);
        test(m, "exec-capabilityboundingset-invert.service", 0, CLD_EXITED);
}

static void test_exec_capabilityambientset(Manager *m) {
        int r;

        /* Check if the kernel has support for ambient capabilities. Run
         * the tests only if that's the case. Clearing all ambient
         * capabilities is fine, since we are expecting them to be unset
         * in the first place for the tests. */
        r = prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_CLEAR_ALL, 0, 0, 0);
        if (r >= 0 || errno != EINVAL) {
                if (getpwnam("nobody")) {
                        test(m, "exec-capabilityambientset.service", 0, CLD_EXITED);
                        test(m, "exec-capabilityambientset-merge.service", 0, CLD_EXITED);
                } else if (getpwnam("nfsnobody")) {
                        test(m, "exec-capabilityambientset-nfsnobody.service", 0, CLD_EXITED);
                        test(m, "exec-capabilityambientset-merge-nfsnobody.service", 0, CLD_EXITED);
                } else
                        log_error_errno(errno, "Skipping %s, could not find nobody/nfsnobody user: %m", __func__);
        } else
                log_error_errno(errno, "Skipping %s, the kernel does not support ambient capabilities: %m", __func__);
}

static void test_exec_privatenetwork(Manager *m) {
        int r;

        r = find_binary("ip", NULL);
        if (r < 0) {
                log_error_errno(r, "Skipping %s, could not find ip binary: %m", __func__);
                return;
        }

        test(m, "exec-privatenetwork-yes.service", 0, CLD_EXITED);
}

static void test_exec_oomscoreadjust(Manager *m) {
        test(m, "exec-oomscoreadjust-positive.service", 0, CLD_EXITED);
        test(m, "exec-oomscoreadjust-negative.service", 0, CLD_EXITED);
}

static void test_exec_ioschedulingclass(Manager *m) {
        test(m, "exec-ioschedulingclass-none.service", 0, CLD_EXITED);
        test(m, "exec-ioschedulingclass-idle.service", 0, CLD_EXITED);
        test(m, "exec-ioschedulingclass-realtime.service", 0, CLD_EXITED);
        test(m, "exec-ioschedulingclass-best-effort.service", 0, CLD_EXITED);
}

static void test_exec_spec_interpolation(Manager *m) {
        test(m, "exec-spec-interpolation.service", 0, CLD_EXITED);
}

static void test_exec_read_only_path_suceed(Manager *m) {
        test(m, "exec-read-only-path-succeed.service", 0, CLD_EXITED);
}

static int run_tests(UnitFileScope scope, const test_function_t *tests) {
        const test_function_t *test = NULL;
        Manager *m = NULL;
        int r;

        assert_se(tests);

        r = manager_new(scope, true, &m);
        if (MANAGER_SKIP_TEST(r)) {
                log_notice_errno(r, "Skipping test: manager_new: %m");
                return EXIT_TEST_SKIP;
        }
        assert_se(r >= 0);
        assert_se(manager_startup(m, NULL, NULL) >= 0);

        for (test = tests; test && *test; test++)
                (*test)(m);

        manager_free(m);

        return 0;
}

int main(int argc, char *argv[]) {
        static const test_function_t user_tests[] = {
                test_exec_workingdirectory,
                test_exec_personality,
                test_exec_ignoresigpipe,
                test_exec_privatetmp,
                test_exec_privatedevices,
                test_exec_privatedevices_capabilities,
                test_exec_protectkernelmodules,
                test_exec_readonlypaths,
                test_exec_readwritepaths,
                test_exec_inaccessiblepaths,
                test_exec_privatenetwork,
                test_exec_systemcallfilter,
                test_exec_systemcallerrornumber,
                test_exec_restrict_namespaces,
                test_exec_user,
                test_exec_group,
                test_exec_supplementary_groups,
                test_exec_dynamic_user,
                test_exec_environment,
                test_exec_environmentfile,
                test_exec_passenvironment,
                test_exec_umask,
                test_exec_runtimedirectory,
                test_exec_capabilityboundingset,
                test_exec_capabilityambientset,
                test_exec_oomscoreadjust,
                test_exec_ioschedulingclass,
                test_exec_spec_interpolation,
                test_exec_read_only_path_suceed,
                NULL,
        };
        static const test_function_t system_tests[] = {
                test_exec_systemcall_system_mode_with_user,
                NULL,
        };
        int r;

        log_set_max_level(LOG_DEBUG);
        log_parse_environment();
        log_open();

        /* It is needed otherwise cgroup creation fails */
        if (getuid() != 0) {
                printf("Skipping test: not root\n");
                return EXIT_TEST_SKIP;
        }

        assert_se(setenv("XDG_RUNTIME_DIR", "/tmp/", 1) == 0);
        assert_se(set_unit_path(get_testdata_dir("/test-execute")) >= 0);

        /* Unset VAR1, VAR2 and VAR3 which are used in the PassEnvironment test
         * cases, otherwise (and if they are present in the environment),
         * `manager_default_environment` will copy them into the default
         * environment which is passed to each created job, which will make the
         * tests that expect those not to be present to fail.
         */
        assert_se(unsetenv("VAR1") == 0);
        assert_se(unsetenv("VAR2") == 0);
        assert_se(unsetenv("VAR3") == 0);

        r = run_tests(UNIT_FILE_USER, user_tests);
        if (r != 0)
                return r;

        return run_tests(UNIT_FILE_SYSTEM, system_tests);
}