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