src/test/test-execute.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2014 Ronny Chevalier
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <grp.h>
  21 #include <pwd.h>
  22 #include <stdio.h>
  23 #include <sys/prctl.h>
  24 #include <sys/types.h>
  25
  26 #include "fileio.h"
  27 #include "fs-util.h"
  28 #include "macro.h"
  29 #include "manager.h"
  30 #include "mkdir.h"
  31 #include "path-util.h"
  32 #include "rm-rf.h"
  33 #if HAVE_SECCOMP
  34 #include "seccomp-util.h"
  35 #endif
  36 #include "stat-util.h"
  37 #include "test-helper.h"
  38 #include "tests.h"
  39 #include "unit.h"
  40 #include "util.h"
  41 #include "virt.h"
  42
  43 typedef void (*test_function_t)(Manager *m);
  44
  45 static void check(Manager *m, Unit *unit, int status_expected, int code_expected) {
  46         Service *service = NULL;
  47         usec_t ts;
  48         usec_t timeout = 2 * USEC_PER_MINUTE;
  49
  50         assert_se(m);
  51         assert_se(unit);
  52
  53         service = SERVICE(unit);
  54         printf("%s\n", unit->id);
  55         exec_context_dump(&service->exec_context, stdout, "\t");
  56         ts = now(CLOCK_MONOTONIC);
  57         while (!IN_SET(service->state, SERVICE_DEAD, SERVICE_FAILED)) {
  58                 int r;
  59                 usec_t n;
  60
  61                 r = sd_event_run(m->event, 100 * USEC_PER_MSEC);
  62                 assert_se(r >= 0);
  63
  64                 n = now(CLOCK_MONOTONIC);
  65                 if (ts + timeout < n) {
  66                         log_error("Test timeout when testing %s", unit->id);
  67                         exit(EXIT_FAILURE);
  68                 }
  69         }
  70         exec_status_dump(&service->main_exec_status, stdout, "\t");
  71         assert_se(service->main_exec_status.status == status_expected);
  72         assert_se(service->main_exec_status.code == code_expected);
  73 }
  74
  75 static bool is_inaccessible_available(void) {
  76         char *p;
  77
  78         FOREACH_STRING(p,
  79                 "/run/systemd/inaccessible/reg",
  80                 "/run/systemd/inaccessible/dir",
  81                 "/run/systemd/inaccessible/chr",
  82                 "/run/systemd/inaccessible/blk",
  83                 "/run/systemd/inaccessible/fifo",
  84                 "/run/systemd/inaccessible/sock"
  85         ) {
  86                 if (access(p, F_OK) < 0)
  87                         return false;
  88         }
  89
  90         return true;
  91 }
  92
  93 static void test(Manager *m, const char *unit_name, int status_expected, int code_expected) {
  94         Unit *unit;
  95
  96         assert_se(unit_name);
  97
  98         assert_se(manager_load_unit(m, unit_name, NULL, NULL, &unit) >= 0);
  99         assert_se(UNIT_VTABLE(unit)->start(unit) >= 0);
 100         check(m, unit, status_expected, code_expected);
 101 }
 102
 103 static void test_exec_bind_paths(Manager *m) {
 104         assert_se(mkdir_p("/tmp/test-exec_bind_paths", 0755) >= 0);
 105         assert_se(mkdir_p("/tmp/test-exec_bind_readonly_paths", 0755) >= 0);
 106
 107         test(m, "exec-bind-paths.service", 0, CLD_EXITED);
 108
 109         (void) rm_rf("/tmp/test-exec_bind_paths", REMOVE_ROOT|REMOVE_PHYSICAL);
 110         (void) rm_rf("/tmp/test-exec_bind_readonly_paths", REMOVE_ROOT|REMOVE_PHYSICAL);
 111 }
 112
 113 static void test_exec_workingdirectory(Manager *m) {
 114         assert_se(mkdir_p("/tmp/test-exec_workingdirectory", 0755) >= 0);
 115
 116         test(m, "exec-workingdirectory.service", 0, CLD_EXITED);
 117
 118         (void) rm_rf("/tmp/test-exec_workingdirectory", REMOVE_ROOT|REMOVE_PHYSICAL);
 119 }
 120
 121 static void test_exec_personality(Manager *m) {
 122 #if defined(__x86_64__)
 123         test(m, "exec-personality-x86-64.service", 0, CLD_EXITED);
 124
 125 #elif defined(__s390__)
 126         test(m, "exec-personality-s390.service", 0, CLD_EXITED);
 127
 128 #elif defined(__powerpc64__)
 129 #  if __BYTE_ORDER == __BIG_ENDIAN
 130         test(m, "exec-personality-ppc64.service", 0, CLD_EXITED);
 131 #  else
 132         test(m, "exec-personality-ppc64le.service", 0, CLD_EXITED);
 133 #  endif
 134
 135 #elif defined(__aarch64__)
 136         test(m, "exec-personality-aarch64.service", 0, CLD_EXITED);
 137
 138 #elif defined(__i386__)
 139         test(m, "exec-personality-x86.service", 0, CLD_EXITED);
 140 #endif
 141 }
 142
 143 static void test_exec_ignoresigpipe(Manager *m) {
 144         test(m, "exec-ignoresigpipe-yes.service", 0, CLD_EXITED);
 145         test(m, "exec-ignoresigpipe-no.service", SIGPIPE, CLD_KILLED);
 146 }
 147
 148 static void test_exec_privatetmp(Manager *m) {
 149         assert_se(touch("/tmp/test-exec_privatetmp") >= 0);
 150
 151         test(m, "exec-privatetmp-yes.service", 0, CLD_EXITED);
 152         test(m, "exec-privatetmp-no.service", 0, CLD_EXITED);
 153
 154         unlink("/tmp/test-exec_privatetmp");
 155 }
 156
 157 static void test_exec_privatedevices(Manager *m) {
 158         if (detect_container() > 0) {
 159                 log_notice("testing in container, skipping %s", __func__);
 160                 return;
 161         }
 162         if (!is_inaccessible_available()) {
 163                 log_notice("testing without inaccessible, skipping %s", __func__);
 164                 return;
 165         }
 166
 167         test(m, "exec-privatedevices-yes.service", 0, CLD_EXITED);
 168         test(m, "exec-privatedevices-no.service", 0, CLD_EXITED);
 169 }
 170
 171 static void test_exec_privatedevices_capabilities(Manager *m) {
 172         int r;
 173
 174         if (detect_container() > 0) {
 175                 log_notice("testing in container, skipping %s", __func__);
 176                 return;
 177         }
 178         if (!is_inaccessible_available()) {
 179                 log_notice("testing without inaccessible, skipping %s", __func__);
 180                 return;
 181         }
 182
 183         /* We use capsh to test if the capabilities are
 184          * properly set, so be sure that it exists */
 185         r = find_binary("capsh", NULL);
 186         if (r < 0) {
 187                 log_error_errno(r, "Skipping %s, could not find capsh binary: %m", __func__);
 188                 return;
 189         }
 190
 191         test(m, "exec-privatedevices-yes-capability-mknod.service", 0, CLD_EXITED);
 192         test(m, "exec-privatedevices-no-capability-mknod.service", 0, CLD_EXITED);
 193         test(m, "exec-privatedevices-yes-capability-sys-rawio.service", 0, CLD_EXITED);
 194         test(m, "exec-privatedevices-no-capability-sys-rawio.service", 0, CLD_EXITED);
 195 }
 196
 197 static void test_exec_protectkernelmodules(Manager *m) {
 198         int r;
 199
 200         if (detect_container() > 0) {
 201                 log_notice("testing in container, skipping %s", __func__);
 202                 return;
 203         }
 204         if (!is_inaccessible_available()) {
 205                 log_notice("testing without inaccessible, skipping %s", __func__);
 206                 return;
 207         }
 208
 209         r = find_binary("capsh", NULL);
 210         if (r < 0) {
 211                 log_error_errno(r, "Skipping %s, could not find capsh binary: %m", __func__);
 212                 return;
 213         }
 214
 215
 216         test(m, "exec-protectkernelmodules-no-capabilities.service", 0, CLD_EXITED);
 217         test(m, "exec-protectkernelmodules-yes-capabilities.service", 0, CLD_EXITED);
 218         test(m, "exec-protectkernelmodules-yes-mount-propagation.service", 0, CLD_EXITED);
 219 }
 220
 221 static void test_exec_readonlypaths(Manager *m) {
 222
 223         if (path_is_read_only_fs("/var") > 0)
 224                 return;
 225
 226         test(m, "exec-readonlypaths.service", 0, CLD_EXITED);
 227         test(m, "exec-readonlypaths-mount-propagation.service", 0, CLD_EXITED);
 228         test(m, "exec-readonlypaths-with-bindpaths.service", 0, CLD_EXITED);
 229 }
 230
 231 static void test_exec_readwritepaths(Manager *m) {
 232
 233         if (path_is_read_only_fs("/") > 0)
 234                 return;
 235
 236         test(m, "exec-readwritepaths-mount-propagation.service", 0, CLD_EXITED);
 237 }
 238
 239 static void test_exec_inaccessiblepaths(Manager *m) {
 240
 241         if (path_is_read_only_fs("/") > 0)
 242                 return;
 243
 244         test(m, "exec-inaccessiblepaths-mount-propagation.service", 0, CLD_EXITED);
 245 }
 246
 247 static void test_exec_inaccessiblepaths_proc(Manager *m) {
 248         if (!is_inaccessible_available()) {
 249                 log_notice("testing without inaccessible, skipping %s", __func__);
 250                 return;
 251         }
 252
 253         test(m, "exec-inaccessiblepaths-proc.service", 0, CLD_EXITED);
 254 }
 255
 256 static void test_exec_systemcallfilter(Manager *m) {
 257 #if HAVE_SECCOMP
 258         if (!is_seccomp_available())
 259                 return;
 260         test(m, "exec-systemcallfilter-not-failing.service", 0, CLD_EXITED);
 261         test(m, "exec-systemcallfilter-not-failing2.service", 0, CLD_EXITED);
 262         test(m, "exec-systemcallfilter-failing.service", SIGSYS, CLD_KILLED);
 263         test(m, "exec-systemcallfilter-failing2.service", SIGSYS, CLD_KILLED);
 264
 265 #endif
 266 }
 267
 268 static void test_exec_systemcallerrornumber(Manager *m) {
 269 #if HAVE_SECCOMP
 270         if (is_seccomp_available())
 271                 test(m, "exec-systemcallerrornumber.service", 1, CLD_EXITED);
 272 #endif
 273 }
 274
 275 static void test_exec_restrict_namespaces(Manager *m) {
 276 #if HAVE_SECCOMP
 277         if (!is_seccomp_available())
 278                 return;
 279
 280         test(m, "exec-restrict-namespaces-no.service", 0, CLD_EXITED);
 281         test(m, "exec-restrict-namespaces-yes.service", 1, CLD_EXITED);
 282         test(m, "exec-restrict-namespaces-mnt.service", 0, CLD_EXITED);
 283         test(m, "exec-restrict-namespaces-mnt-blacklist.service", 1, CLD_EXITED);
 284 #endif
 285 }
 286
 287 static void test_exec_systemcall_system_mode_with_user(Manager *m) {
 288 #if HAVE_SECCOMP
 289         if (!is_seccomp_available())
 290                 return;
 291         if (getpwnam("nobody"))
 292                 test(m, "exec-systemcallfilter-system-user.service", 0, CLD_EXITED);
 293         else if (getpwnam("nfsnobody"))
 294                 test(m, "exec-systemcallfilter-system-user-nfsnobody.service", 0, CLD_EXITED);
 295         else
 296                 log_error_errno(errno, "Skipping %s, could not find nobody/nfsnobody user: %m", __func__);
 297 #endif
 298 }
 299
 300 static void test_exec_user(Manager *m) {
 301         if (getpwnam("nobody"))
 302                 test(m, "exec-user.service", 0, CLD_EXITED);
 303         else if (getpwnam("nfsnobody"))
 304                 test(m, "exec-user-nfsnobody.service", 0, CLD_EXITED);
 305         else
 306                 log_error_errno(errno, "Skipping %s, could not find nobody/nfsnobody user: %m", __func__);
 307 }
 308
 309 static void test_exec_group(Manager *m) {
 310         if (getgrnam("nobody"))
 311                 test(m, "exec-group.service", 0, CLD_EXITED);
 312         else if (getgrnam("nfsnobody"))
 313                 test(m, "exec-group-nfsnobody.service", 0, CLD_EXITED);
 314         else
 315                 log_error_errno(errno, "Skipping %s, could not find nobody/nfsnobody group: %m", __func__);
 316 }
 317
 318 static void test_exec_supplementary_groups(Manager *m) {
 319         test(m, "exec-supplementarygroups.service", 0, CLD_EXITED);
 320         test(m, "exec-supplementarygroups-single-group.service", 0, CLD_EXITED);
 321         test(m, "exec-supplementarygroups-single-group-user.service", 0, CLD_EXITED);
 322         test(m, "exec-supplementarygroups-multiple-groups-default-group-user.service", 0, CLD_EXITED);
 323         test(m, "exec-supplementarygroups-multiple-groups-withgid.service", 0, CLD_EXITED);
 324         test(m, "exec-supplementarygroups-multiple-groups-withuid.service", 0, CLD_EXITED);
 325 }
 326
 327 static void test_exec_dynamic_user(Manager *m) {
 328         test(m, "exec-dynamicuser-fixeduser.service", 0, CLD_EXITED);
 329         test(m, "exec-dynamicuser-fixeduser-one-supplementarygroup.service", 0, CLD_EXITED);
 330         test(m, "exec-dynamicuser-supplementarygroups.service", 0, CLD_EXITED);
 331         test(m, "exec-dynamicuser-state-dir.service", 0, CLD_EXITED);
 332 }
 333
 334 static void test_exec_environment(Manager *m) {
 335         test(m, "exec-environment.service", 0, CLD_EXITED);
 336         test(m, "exec-environment-multiple.service", 0, CLD_EXITED);
 337         test(m, "exec-environment-empty.service", 0, CLD_EXITED);
 338 }
 339
 340 static void test_exec_environmentfile(Manager *m) {
 341         static const char e[] =
 342                 "VAR1='word1 word2'\n"
 343                 "VAR2=word3 \n"
 344                 "# comment1\n"
 345                 "\n"
 346                 "; comment2\n"
 347                 " ; # comment3\n"
 348                 "line without an equal\n"
 349                 "VAR3='$word 5 6'\n";
 350         int r;
 351
 352         r = write_string_file("/tmp/test-exec_environmentfile.conf", e, WRITE_STRING_FILE_CREATE);
 353         assert_se(r == 0);
 354
 355         test(m, "exec-environmentfile.service", 0, CLD_EXITED);
 356
 357         unlink("/tmp/test-exec_environmentfile.conf");
 358 }
 359
 360 static void test_exec_passenvironment(Manager *m) {
 361         /* test-execute runs under MANAGER_USER which, by default, forwards all
 362          * variables present in the environment, but only those that are
 363          * present _at the time it is created_!
 364          *
 365          * So these PassEnvironment checks are still expected to work, since we
 366          * are ensuring the variables are not present at manager creation (they
 367          * are unset explicitly in main) and are only set here.
 368          *
 369          * This is still a good approximation of how a test for MANAGER_SYSTEM
 370          * would work.
 371          */
 372         assert_se(setenv("VAR1", "word1 word2", 1) == 0);
 373         assert_se(setenv("VAR2", "word3", 1) == 0);
 374         assert_se(setenv("VAR3", "$word 5 6", 1) == 0);
 375         test(m, "exec-passenvironment.service", 0, CLD_EXITED);
 376         test(m, "exec-passenvironment-repeated.service", 0, CLD_EXITED);
 377         test(m, "exec-passenvironment-empty.service", 0, CLD_EXITED);
 378         assert_se(unsetenv("VAR1") == 0);
 379         assert_se(unsetenv("VAR2") == 0);
 380         assert_se(unsetenv("VAR3") == 0);
 381         test(m, "exec-passenvironment-absent.service", 0, CLD_EXITED);
 382 }
 383
 384 static void test_exec_umask(Manager *m) {
 385         test(m, "exec-umask-default.service", 0, CLD_EXITED);
 386         test(m, "exec-umask-0177.service", 0, CLD_EXITED);
 387 }
 388
 389 static void test_exec_runtimedirectory(Manager *m) {
 390         test(m, "exec-runtimedirectory.service", 0, CLD_EXITED);
 391         test(m, "exec-runtimedirectory-mode.service", 0, CLD_EXITED);
 392         if (getgrnam("nobody"))
 393                 test(m, "exec-runtimedirectory-owner.service", 0, CLD_EXITED);
 394         else if (getgrnam("nfsnobody"))
 395                 test(m, "exec-runtimedirectory-owner-nfsnobody.service", 0, CLD_EXITED);
 396         else
 397                 log_error_errno(errno, "Skipping %s, could not find nobody/nfsnobody group: %m", __func__);
 398 }
 399
 400 static void test_exec_capabilityboundingset(Manager *m) {
 401         int r;
 402
 403         r = find_binary("capsh", NULL);
 404         if (r < 0) {
 405                 log_error_errno(r, "Skipping %s, could not find capsh binary: %m", __func__);
 406                 return;
 407         }
 408
 409         test(m, "exec-capabilityboundingset-simple.service", 0, CLD_EXITED);
 410         test(m, "exec-capabilityboundingset-reset.service", 0, CLD_EXITED);
 411         test(m, "exec-capabilityboundingset-merge.service", 0, CLD_EXITED);
 412         test(m, "exec-capabilityboundingset-invert.service", 0, CLD_EXITED);
 413 }
 414
 415 static void test_exec_capabilityambientset(Manager *m) {
 416         int r;
 417
 418         /* Check if the kernel has support for ambient capabilities. Run
 419          * the tests only if that's the case. Clearing all ambient
 420          * capabilities is fine, since we are expecting them to be unset
 421          * in the first place for the tests. */
 422         r = prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_CLEAR_ALL, 0, 0, 0);
 423         if (r >= 0 || errno != EINVAL) {
 424                 if (getpwnam("nobody")) {
 425                         test(m, "exec-capabilityambientset.service", 0, CLD_EXITED);
 426                         test(m, "exec-capabilityambientset-merge.service", 0, CLD_EXITED);
 427                 } else if (getpwnam("nfsnobody")) {
 428                         test(m, "exec-capabilityambientset-nfsnobody.service", 0, CLD_EXITED);
 429                         test(m, "exec-capabilityambientset-merge-nfsnobody.service", 0, CLD_EXITED);
 430                 } else
 431                         log_error_errno(errno, "Skipping %s, could not find nobody/nfsnobody user: %m", __func__);
 432         } else
 433                 log_error_errno(errno, "Skipping %s, the kernel does not support ambient capabilities: %m", __func__);
 434 }
 435
 436 static void test_exec_privatenetwork(Manager *m) {
 437         int r;
 438
 439         r = find_binary("ip", NULL);
 440         if (r < 0) {
 441                 log_error_errno(r, "Skipping %s, could not find ip binary: %m", __func__);
 442                 return;
 443         }
 444
 445         test(m, "exec-privatenetwork-yes.service", 0, CLD_EXITED);
 446 }
 447
 448 static void test_exec_oomscoreadjust(Manager *m) {
 449         test(m, "exec-oomscoreadjust-positive.service", 0, CLD_EXITED);
 450         test(m, "exec-oomscoreadjust-negative.service", 0, CLD_EXITED);
 451 }
 452
 453 static void test_exec_ioschedulingclass(Manager *m) {
 454         test(m, "exec-ioschedulingclass-none.service", 0, CLD_EXITED);
 455         test(m, "exec-ioschedulingclass-idle.service", 0, CLD_EXITED);
 456         test(m, "exec-ioschedulingclass-realtime.service", 0, CLD_EXITED);
 457         test(m, "exec-ioschedulingclass-best-effort.service", 0, CLD_EXITED);
 458 }
 459
 460 static void test_exec_spec_interpolation(Manager *m) {
 461         test(m, "exec-spec-interpolation.service", 0, CLD_EXITED);
 462 }
 463
 464 static void test_exec_read_only_path_suceed(Manager *m) {
 465         test(m, "exec-read-only-path-succeed.service", 0, CLD_EXITED);
 466 }
 467
 468 static void test_exec_unset_environment(Manager *m) {
 469         test(m, "exec-unset-environment.service", 0, CLD_EXITED);
 470 }
 471
 472 static void test_exec_specifier(Manager *m) {
 473         test(m, "exec-specifier.service", 0, CLD_EXITED);
 474 }
 475
 476 static int run_tests(UnitFileScope scope, const test_function_t *tests) {
 477         const test_function_t *test = NULL;
 478         Manager *m = NULL;
 479         int r;
 480
 481         assert_se(tests);
 482
 483         r = manager_new(scope, MANAGER_TEST_RUN_MINIMAL, &m);
 484         if (MANAGER_SKIP_TEST(r)) {
 485                 log_notice_errno(r, "Skipping test: manager_new: %m");
 486                 return EXIT_TEST_SKIP;
 487         }
 488         assert_se(r >= 0);
 489         assert_se(manager_startup(m, NULL, NULL) >= 0);
 490
 491         for (test = tests; test && *test; test++)
 492                 (*test)(m);
 493
 494         manager_free(m);
 495
 496         return 0;
 497 }
 498
 499 int main(int argc, char *argv[]) {
 500         static const test_function_t user_tests[] = {
 501                 test_exec_bind_paths,
 502                 test_exec_workingdirectory,
 503                 test_exec_personality,
 504                 test_exec_ignoresigpipe,
 505                 test_exec_privatetmp,
 506                 test_exec_privatedevices,
 507                 test_exec_privatedevices_capabilities,
 508                 test_exec_protectkernelmodules,
 509                 test_exec_readonlypaths,
 510                 test_exec_readwritepaths,
 511                 test_exec_inaccessiblepaths,
 512                 test_exec_inaccessiblepaths_proc,
 513                 test_exec_privatenetwork,
 514                 test_exec_systemcallfilter,
 515                 test_exec_systemcallerrornumber,
 516                 test_exec_restrict_namespaces,
 517                 test_exec_user,
 518                 test_exec_group,
 519                 test_exec_supplementary_groups,
 520                 test_exec_environment,
 521                 test_exec_environmentfile,
 522                 test_exec_passenvironment,
 523                 test_exec_umask,
 524                 test_exec_runtimedirectory,
 525                 test_exec_capabilityboundingset,
 526                 test_exec_capabilityambientset,
 527                 test_exec_oomscoreadjust,
 528                 test_exec_ioschedulingclass,
 529                 test_exec_spec_interpolation,
 530                 test_exec_read_only_path_suceed,
 531                 test_exec_unset_environment,
 532                 NULL,
 533         };
 534         static const test_function_t system_tests[] = {
 535                 test_exec_systemcall_system_mode_with_user,
 536                 test_exec_dynamic_user,
 537                 test_exec_specifier,
 538                 NULL,
 539         };
 540         int r;
 541
 542         log_set_max_level(LOG_DEBUG);
 543         log_parse_environment();
 544         log_open();
 545
 546         /* It is needed otherwise cgroup creation fails */
 547         if (getuid() != 0) {
 548                 puts("Skipping test: not root");
 549                 return EXIT_TEST_SKIP;
 550         }
 551
 552         r = enter_cgroup_subroot();
 553         if (r == -ENOMEDIUM) {
 554                 puts("Skipping test: cgroupfs not available");
 555                 return EXIT_TEST_SKIP;
 556         }
 557
 558         assert_se(setenv("XDG_RUNTIME_DIR", "/tmp/", 1) == 0);
 559         assert_se(set_unit_path(get_testdata_dir("/test-execute")) >= 0);
 560
 561         /* Unset VAR1, VAR2 and VAR3 which are used in the PassEnvironment test
 562          * cases, otherwise (and if they are present in the environment),
 563          * `manager_default_environment` will copy them into the default
 564          * environment which is passed to each created job, which will make the
 565          * tests that expect those not to be present to fail.
 566          */
 567         assert_se(unsetenv("VAR1") == 0);
 568         assert_se(unsetenv("VAR2") == 0);
 569         assert_se(unsetenv("VAR3") == 0);
 570
 571         r = run_tests(UNIT_FILE_USER, user_tests);
 572         if (r != 0)
 573                 return r;
 574
 575         return run_tests(UNIT_FILE_SYSTEM, system_tests);
 576 }