src/test/test-execute.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <grp.h>
   4 #include <pwd.h>
   5 #include <stdio.h>
   6 #include <sys/prctl.h>
   7 #include <sys/types.h>
   8
   9 #include "capability-util.h"
  10 #include "cpu-set-util.h"
  11 #include "errno-list.h"
  12 #include "fileio.h"
  13 #include "fs-util.h"
  14 #include "macro.h"
  15 #include "manager.h"
  16 #include "missing_prctl.h"
  17 #include "mkdir.h"
  18 #include "path-util.h"
  19 #include "rm-rf.h"
  20 #if HAVE_SECCOMP
  21 #include "seccomp-util.h"
  22 #endif
  23 #include "service.h"
  24 #include "stat-util.h"
  25 #include "test-helper.h"
  26 #include "tests.h"
  27 #include "unit.h"
  28 #include "user-util.h"
  29 #include "util.h"
  30 #include "virt.h"
  31
  32 static bool can_unshare;
  33
  34 typedef void (*test_function_t)(Manager *m);
  35
  36 static void check(Manager *m, Unit *unit, int status_expected, int code_expected) {
  37         Service *service = NULL;
  38         usec_t ts;
  39         usec_t timeout = 2 * USEC_PER_MINUTE;
  40
  41         assert_se(m);
  42         assert_se(unit);
  43
  44         service = SERVICE(unit);
  45         printf("%s\n", unit->id);
  46         exec_context_dump(&service->exec_context, stdout, "\t");
  47         ts = now(CLOCK_MONOTONIC);
  48         while (!IN_SET(service->state, SERVICE_DEAD, SERVICE_FAILED)) {
  49                 int r;
  50                 usec_t n;
  51
  52                 r = sd_event_run(m->event, 100 * USEC_PER_MSEC);
  53                 assert_se(r >= 0);
  54
  55                 n = now(CLOCK_MONOTONIC);
  56                 if (ts + timeout < n) {
  57                         log_error("Test timeout when testing %s", unit->id);
  58                         r = unit_kill(unit, KILL_ALL, SIGKILL, NULL);
  59                         if (r < 0)
  60                                 log_error_errno(r, "Failed to kill %s: %m", unit->id);
  61                         exit(EXIT_FAILURE);
  62                 }
  63         }
  64         exec_status_dump(&service->main_exec_status, stdout, "\t");
  65         assert_se(service->main_exec_status.status == status_expected);
  66         assert_se(service->main_exec_status.code == code_expected);
  67 }
  68
  69 static bool check_nobody_user_and_group(void) {
  70         static int cache = -1;
  71         struct passwd *p;
  72         struct group *g;
  73
  74         if (cache >= 0)
  75                 return !!cache;
  76
  77         if (!synthesize_nobody())
  78                 goto invalid;
  79
  80         p = getpwnam(NOBODY_USER_NAME);
  81         if (!p ||
  82             !streq(p->pw_name, NOBODY_USER_NAME) ||
  83             p->pw_uid != UID_NOBODY ||
  84             p->pw_gid != GID_NOBODY)
  85                 goto invalid;
  86
  87         p = getpwuid(UID_NOBODY);
  88         if (!p ||
  89             !streq(p->pw_name, NOBODY_USER_NAME) ||
  90             p->pw_uid != UID_NOBODY ||
  91             p->pw_gid != GID_NOBODY)
  92                 goto invalid;
  93
  94         g = getgrnam(NOBODY_GROUP_NAME);
  95         if (!g ||
  96             !streq(g->gr_name, NOBODY_GROUP_NAME) ||
  97             g->gr_gid != GID_NOBODY)
  98                 goto invalid;
  99
 100         g = getgrgid(GID_NOBODY);
 101         if (!g ||
 102             !streq(g->gr_name, NOBODY_GROUP_NAME) ||
 103             g->gr_gid != GID_NOBODY)
 104                 goto invalid;
 105
 106         cache = 1;
 107         return true;
 108
 109 invalid:
 110         cache = 0;
 111         return false;
 112 }
 113
 114 static bool check_user_has_group_with_same_name(const char *name) {
 115         struct passwd *p;
 116         struct group *g;
 117
 118         assert(name);
 119
 120         p = getpwnam(name);
 121         if (!p ||
 122             !streq(p->pw_name, name))
 123                 return false;
 124
 125         g = getgrgid(p->pw_gid);
 126         if (!g ||
 127             !streq(g->gr_name, name))
 128                 return false;
 129
 130         return true;
 131 }
 132
 133 static bool is_inaccessible_available(void) {
 134         const char *p;
 135
 136         FOREACH_STRING(p,
 137                 "/run/systemd/inaccessible/reg",
 138                 "/run/systemd/inaccessible/dir",
 139                 "/run/systemd/inaccessible/chr",
 140                 "/run/systemd/inaccessible/blk",
 141                 "/run/systemd/inaccessible/fifo",
 142                 "/run/systemd/inaccessible/sock"
 143         ) {
 144                 if (access(p, F_OK) < 0)
 145                         return false;
 146         }
 147
 148         return true;
 149 }
 150
 151 static void test(Manager *m, const char *unit_name, int status_expected, int code_expected) {
 152         Unit *unit;
 153
 154         assert_se(unit_name);
 155
 156         assert_se(manager_load_startable_unit_or_warn(m, unit_name, NULL, &unit) >= 0);
 157         assert_se(unit_start(unit) >= 0);
 158         check(m, unit, status_expected, code_expected);
 159 }
 160
 161 static void test_exec_bindpaths(Manager *m) {
 162         assert_se(mkdir_p("/tmp/test-exec-bindpaths", 0755) >= 0);
 163         assert_se(mkdir_p("/tmp/test-exec-bindreadonlypaths", 0755) >= 0);
 164
 165         test(m, "exec-bindpaths.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED);
 166
 167         (void) rm_rf("/tmp/test-exec-bindpaths", REMOVE_ROOT|REMOVE_PHYSICAL);
 168         (void) rm_rf("/tmp/test-exec-bindreadonlypaths", REMOVE_ROOT|REMOVE_PHYSICAL);
 169 }
 170
 171 static void test_exec_cpuaffinity(Manager *m) {
 172         _cleanup_cpu_free_ cpu_set_t *c = NULL;
 173         unsigned n;
 174
 175         assert_se(c = cpu_set_malloc(&n));
 176         assert_se(sched_getaffinity(0, CPU_ALLOC_SIZE(n), c) >= 0);
 177
 178         if (CPU_ISSET_S(0, CPU_ALLOC_SIZE(n), c) == 0) {
 179                 log_notice("Cannot use CPU 0, skipping %s", __func__);
 180                 return;
 181         }
 182
 183         test(m, "exec-cpuaffinity1.service", 0, CLD_EXITED);
 184         test(m, "exec-cpuaffinity2.service", 0, CLD_EXITED);
 185
 186         if (CPU_ISSET_S(1, CPU_ALLOC_SIZE(n), c) == 0 ||
 187             CPU_ISSET_S(2, CPU_ALLOC_SIZE(n), c) == 0) {
 188                 log_notice("Cannot use CPU 1 or 2, skipping remaining tests in %s", __func__);
 189                 return;
 190         }
 191
 192         test(m, "exec-cpuaffinity3.service", 0, CLD_EXITED);
 193 }
 194
 195 static void test_exec_workingdirectory(Manager *m) {
 196         assert_se(mkdir_p("/tmp/test-exec_workingdirectory", 0755) >= 0);
 197
 198         test(m, "exec-workingdirectory.service", 0, CLD_EXITED);
 199         test(m, "exec-workingdirectory-trailing-dot.service", 0, CLD_EXITED);
 200
 201         (void) rm_rf("/tmp/test-exec_workingdirectory", REMOVE_ROOT|REMOVE_PHYSICAL);
 202 }
 203
 204 static void test_exec_personality(Manager *m) {
 205 #if defined(__x86_64__)
 206         test(m, "exec-personality-x86-64.service", 0, CLD_EXITED);
 207
 208 #elif defined(__s390__)
 209         test(m, "exec-personality-s390.service", 0, CLD_EXITED);
 210
 211 #elif defined(__powerpc64__)
 212 #  if __BYTE_ORDER == __BIG_ENDIAN
 213         test(m, "exec-personality-ppc64.service", 0, CLD_EXITED);
 214 #  else
 215         test(m, "exec-personality-ppc64le.service", 0, CLD_EXITED);
 216 #  endif
 217
 218 #elif defined(__aarch64__)
 219         test(m, "exec-personality-aarch64.service", 0, CLD_EXITED);
 220
 221 #elif defined(__i386__)
 222         test(m, "exec-personality-x86.service", 0, CLD_EXITED);
 223 #else
 224         log_notice("Unknown personality, skipping %s", __func__);
 225 #endif
 226 }
 227
 228 static void test_exec_ignoresigpipe(Manager *m) {
 229         test(m, "exec-ignoresigpipe-yes.service", 0, CLD_EXITED);
 230         test(m, "exec-ignoresigpipe-no.service", SIGPIPE, CLD_KILLED);
 231 }
 232
 233 static void test_exec_privatetmp(Manager *m) {
 234         assert_se(touch("/tmp/test-exec_privatetmp") >= 0);
 235
 236         test(m, "exec-privatetmp-yes.service", can_unshare ? 0 : EXIT_FAILURE, CLD_EXITED);
 237         test(m, "exec-privatetmp-no.service", 0, CLD_EXITED);
 238
 239         unlink("/tmp/test-exec_privatetmp");
 240 }
 241
 242 static void test_exec_privatedevices(Manager *m) {
 243         int r;
 244
 245         if (detect_container() > 0) {
 246                 log_notice("Testing in container, skipping %s", __func__);
 247                 return;
 248         }
 249         if (!is_inaccessible_available()) {
 250                 log_notice("Testing without inaccessible, skipping %s", __func__);
 251                 return;
 252         }
 253
 254         test(m, "exec-privatedevices-yes.service", can_unshare ? 0 : EXIT_FAILURE, CLD_EXITED);
 255         test(m, "exec-privatedevices-no.service", 0, CLD_EXITED);
 256         test(m, "exec-privatedevices-disabled-by-prefix.service", can_unshare ? 0 : EXIT_FAILURE, CLD_EXITED);
 257
 258         /* We use capsh to test if the capabilities are
 259          * properly set, so be sure that it exists */
 260         r = find_binary("capsh", NULL);
 261         if (r < 0) {
 262                 log_notice_errno(r, "Could not find capsh binary, skipping remaining tests in %s: %m", __func__);
 263                 return;
 264         }
 265
 266         test(m, "exec-privatedevices-yes-capability-mknod.service", 0, CLD_EXITED);
 267         test(m, "exec-privatedevices-no-capability-mknod.service", 0, CLD_EXITED);
 268         test(m, "exec-privatedevices-yes-capability-sys-rawio.service", 0, CLD_EXITED);
 269         test(m, "exec-privatedevices-no-capability-sys-rawio.service", 0, CLD_EXITED);
 270 }
 271
 272 static void test_exec_protectkernelmodules(Manager *m) {
 273         int r;
 274
 275         if (detect_container() > 0) {
 276                 log_notice("Testing in container, skipping %s", __func__);
 277                 return;
 278         }
 279         if (!is_inaccessible_available()) {
 280                 log_notice("Testing without inaccessible, skipping %s", __func__);
 281                 return;
 282         }
 283
 284         r = find_binary("capsh", NULL);
 285         if (r < 0) {
 286                 log_notice_errno(r, "Skipping %s, could not find capsh binary: %m", __func__);
 287                 return;
 288         }
 289
 290         test(m, "exec-protectkernelmodules-no-capabilities.service", 0, CLD_EXITED);
 291         test(m, "exec-protectkernelmodules-yes-capabilities.service", 0, CLD_EXITED);
 292         test(m, "exec-protectkernelmodules-yes-mount-propagation.service", can_unshare ? 0 : EXIT_FAILURE, CLD_EXITED);
 293 }
 294
 295 static void test_exec_readonlypaths(Manager *m) {
 296
 297         test(m, "exec-readonlypaths-simple.service", can_unshare ? 0 : EXIT_FAILURE, CLD_EXITED);
 298
 299         if (path_is_read_only_fs("/var") > 0) {
 300                 log_notice("Directory /var is readonly, skipping remaining tests in %s", __func__);
 301                 return;
 302         }
 303
 304         test(m, "exec-readonlypaths.service", can_unshare ? 0 : EXIT_FAILURE, CLD_EXITED);
 305         test(m, "exec-readonlypaths-with-bindpaths.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED);
 306         test(m, "exec-readonlypaths-mount-propagation.service", can_unshare ? 0 : EXIT_FAILURE, CLD_EXITED);
 307 }
 308
 309 static void test_exec_readwritepaths(Manager *m) {
 310
 311         if (path_is_read_only_fs("/") > 0) {
 312                 log_notice("Root directory is readonly, skipping %s", __func__);
 313                 return;
 314         }
 315
 316         test(m, "exec-readwritepaths-mount-propagation.service", can_unshare ? 0 : EXIT_FAILURE, CLD_EXITED);
 317 }
 318
 319 static void test_exec_inaccessiblepaths(Manager *m) {
 320
 321         if (!is_inaccessible_available()) {
 322                 log_notice("Testing without inaccessible, skipping %s", __func__);
 323                 return;
 324         }
 325
 326         test(m, "exec-inaccessiblepaths-proc.service", can_unshare ? 0 : EXIT_FAILURE, CLD_EXITED);
 327
 328         if (path_is_read_only_fs("/") > 0) {
 329                 log_notice("Root directory is readonly, skipping remaining tests in %s", __func__);
 330                 return;
 331         }
 332
 333         test(m, "exec-inaccessiblepaths-mount-propagation.service", can_unshare ? 0 : EXIT_FAILURE, CLD_EXITED);
 334 }
 335
 336 static void test_exec_temporaryfilesystem(Manager *m) {
 337
 338         test(m, "exec-temporaryfilesystem-options.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED);
 339         test(m, "exec-temporaryfilesystem-ro.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED);
 340         test(m, "exec-temporaryfilesystem-rw.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED);
 341         test(m, "exec-temporaryfilesystem-usr.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED);
 342 }
 343
 344 static void test_exec_systemcallfilter(Manager *m) {
 345 #if HAVE_SECCOMP
 346         int r;
 347
 348         if (!is_seccomp_available()) {
 349                 log_notice("Seccomp not available, skipping %s", __func__);
 350                 return;
 351         }
 352
 353         test(m, "exec-systemcallfilter-not-failing.service", 0, CLD_EXITED);
 354         test(m, "exec-systemcallfilter-not-failing2.service", 0, CLD_EXITED);
 355         test(m, "exec-systemcallfilter-failing.service", SIGSYS, CLD_KILLED);
 356         test(m, "exec-systemcallfilter-failing2.service", SIGSYS, CLD_KILLED);
 357
 358         r = find_binary("python3", NULL);
 359         if (r < 0) {
 360                 log_notice_errno(r, "Skipping remaining tests in %s, could not find python3 binary: %m", __func__);
 361                 return;
 362         }
 363
 364         test(m, "exec-systemcallfilter-with-errno-name.service", errno_from_name("EILSEQ"), CLD_EXITED);
 365         test(m, "exec-systemcallfilter-with-errno-number.service", 255, CLD_EXITED);
 366         test(m, "exec-systemcallfilter-with-errno-multi.service", errno_from_name("EILSEQ"), CLD_EXITED);
 367 #endif
 368 }
 369
 370 static void test_exec_systemcallerrornumber(Manager *m) {
 371 #if HAVE_SECCOMP
 372         int r;
 373
 374         if (!is_seccomp_available()) {
 375                 log_notice("Seccomp not available, skipping %s", __func__);
 376                 return;
 377         }
 378
 379         r = find_binary("python3", NULL);
 380         if (r < 0) {
 381                 log_notice_errno(r, "Skipping %s, could not find python3 binary: %m", __func__);
 382                 return;
 383         }
 384
 385         test(m, "exec-systemcallerrornumber-name.service", errno_from_name("EACCES"), CLD_EXITED);
 386         test(m, "exec-systemcallerrornumber-number.service", 255, CLD_EXITED);
 387 #endif
 388 }
 389
 390 static void test_exec_restrictnamespaces(Manager *m) {
 391 #if HAVE_SECCOMP
 392         if (!is_seccomp_available()) {
 393                 log_notice("Seccomp not available, skipping %s", __func__);
 394                 return;
 395         }
 396
 397         test(m, "exec-restrictnamespaces-no.service", can_unshare ? 0 : EXIT_FAILURE, CLD_EXITED);
 398         test(m, "exec-restrictnamespaces-yes.service", 1, CLD_EXITED);
 399         test(m, "exec-restrictnamespaces-mnt.service", can_unshare ? 0 : EXIT_FAILURE, CLD_EXITED);
 400         test(m, "exec-restrictnamespaces-mnt-blacklist.service", 1, CLD_EXITED);
 401         test(m, "exec-restrictnamespaces-merge-and.service", can_unshare ? 0 : EXIT_FAILURE, CLD_EXITED);
 402         test(m, "exec-restrictnamespaces-merge-or.service", can_unshare ? 0 : EXIT_FAILURE, CLD_EXITED);
 403         test(m, "exec-restrictnamespaces-merge-all.service", can_unshare ? 0 : EXIT_FAILURE, CLD_EXITED);
 404 #endif
 405 }
 406
 407 static void test_exec_systemcallfilter_system(Manager *m) {
 408 #if HAVE_SECCOMP
 409         if (!is_seccomp_available()) {
 410                 log_notice("Seccomp not available, skipping %s", __func__);
 411                 return;
 412         }
 413
 414         test(m, "exec-systemcallfilter-system-user.service", 0, CLD_EXITED);
 415
 416         if (!check_nobody_user_and_group()) {
 417                 log_notice("nobody user/group is not synthesized or may conflict to other entries, skipping remaining tests in %s", __func__);
 418                 return;
 419         }
 420
 421         if (!STR_IN_SET(NOBODY_USER_NAME, "nobody", "nfsnobody")) {
 422                 log_notice("Unsupported nobody user name '%s', skipping remaining tests in %s", NOBODY_USER_NAME, __func__);
 423                 return;
 424         }
 425
 426         test(m, "exec-systemcallfilter-system-user-" NOBODY_USER_NAME ".service", 0, CLD_EXITED);
 427 #endif
 428 }
 429
 430 static void test_exec_user(Manager *m) {
 431         test(m, "exec-user.service", 0, CLD_EXITED);
 432
 433         if (!check_nobody_user_and_group()) {
 434                 log_notice("nobody user/group is not synthesized or may conflict to other entries, skipping remaining tests in %s", __func__);
 435                 return;
 436         }
 437
 438         if (!STR_IN_SET(NOBODY_USER_NAME, "nobody", "nfsnobody")) {
 439                 log_notice("Unsupported nobody user name '%s', skipping remaining tests in %s", NOBODY_USER_NAME, __func__);
 440                 return;
 441         }
 442
 443         test(m, "exec-user-" NOBODY_USER_NAME ".service", 0, CLD_EXITED);
 444 }
 445
 446 static void test_exec_group(Manager *m) {
 447         test(m, "exec-group.service", 0, CLD_EXITED);
 448
 449         if (!check_nobody_user_and_group()) {
 450                 log_notice("nobody user/group is not synthesized or may conflict to other entries, skipping remaining tests in %s", __func__);
 451                 return;
 452         }
 453
 454         if (!STR_IN_SET(NOBODY_GROUP_NAME, "nobody", "nfsnobody", "nogroup")) {
 455                 log_notice("Unsupported nobody group name '%s', skipping remaining tests in %s", NOBODY_GROUP_NAME, __func__);
 456                 return;
 457         }
 458
 459         test(m, "exec-group-" NOBODY_GROUP_NAME ".service", 0, CLD_EXITED);
 460 }
 461
 462 static void test_exec_supplementarygroups(Manager *m) {
 463         test(m, "exec-supplementarygroups.service", 0, CLD_EXITED);
 464         test(m, "exec-supplementarygroups-single-group.service", 0, CLD_EXITED);
 465         test(m, "exec-supplementarygroups-single-group-user.service", 0, CLD_EXITED);
 466         test(m, "exec-supplementarygroups-multiple-groups-default-group-user.service", 0, CLD_EXITED);
 467         test(m, "exec-supplementarygroups-multiple-groups-withgid.service", 0, CLD_EXITED);
 468         test(m, "exec-supplementarygroups-multiple-groups-withuid.service", 0, CLD_EXITED);
 469 }
 470
 471 static void test_exec_dynamicuser(Manager *m) {
 472
 473         test(m, "exec-dynamicuser-fixeduser.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED);
 474         if (check_user_has_group_with_same_name("adm"))
 475                 test(m, "exec-dynamicuser-fixeduser-adm.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED);
 476         if (check_user_has_group_with_same_name("games"))
 477                 test(m, "exec-dynamicuser-fixeduser-games.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED);
 478         test(m, "exec-dynamicuser-fixeduser-one-supplementarygroup.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED);
 479         test(m, "exec-dynamicuser-supplementarygroups.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED);
 480         test(m, "exec-dynamicuser-statedir.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED);
 481
 482         (void) rm_rf("/var/lib/test-dynamicuser-migrate", REMOVE_ROOT|REMOVE_PHYSICAL);
 483         (void) rm_rf("/var/lib/test-dynamicuser-migrate2", REMOVE_ROOT|REMOVE_PHYSICAL);
 484         (void) rm_rf("/var/lib/private/test-dynamicuser-migrate", REMOVE_ROOT|REMOVE_PHYSICAL);
 485         (void) rm_rf("/var/lib/private/test-dynamicuser-migrate2", REMOVE_ROOT|REMOVE_PHYSICAL);
 486
 487         test(m, "exec-dynamicuser-statedir-migrate-step1.service", 0, CLD_EXITED);
 488         test(m, "exec-dynamicuser-statedir-migrate-step2.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED);
 489
 490         (void) rm_rf("/var/lib/test-dynamicuser-migrate", REMOVE_ROOT|REMOVE_PHYSICAL);
 491         (void) rm_rf("/var/lib/test-dynamicuser-migrate2", REMOVE_ROOT|REMOVE_PHYSICAL);
 492         (void) rm_rf("/var/lib/private/test-dynamicuser-migrate", REMOVE_ROOT|REMOVE_PHYSICAL);
 493         (void) rm_rf("/var/lib/private/test-dynamicuser-migrate2", REMOVE_ROOT|REMOVE_PHYSICAL);
 494 }
 495
 496 static void test_exec_environment(Manager *m) {
 497         test(m, "exec-environment-no-substitute.service", 0, CLD_EXITED);
 498         test(m, "exec-environment.service", 0, CLD_EXITED);
 499         test(m, "exec-environment-multiple.service", 0, CLD_EXITED);
 500         test(m, "exec-environment-empty.service", 0, CLD_EXITED);
 501 }
 502
 503 static void test_exec_environmentfile(Manager *m) {
 504         static const char e[] =
 505                 "VAR1='word1 word2'\n"
 506                 "VAR2=word3 \n"
 507                 "# comment1\n"
 508                 "\n"
 509                 "; comment2\n"
 510                 " ; # comment3\n"
 511                 "line without an equal\n"
 512                 "VAR3='$word 5 6'\n"
 513                 "VAR4='new\nline'\n"
 514                 "VAR5=password\\with\\backslashes";
 515         int r;
 516
 517         r = write_string_file("/tmp/test-exec_environmentfile.conf", e, WRITE_STRING_FILE_CREATE);
 518         assert_se(r == 0);
 519
 520         test(m, "exec-environmentfile.service", 0, CLD_EXITED);
 521
 522         (void) unlink("/tmp/test-exec_environmentfile.conf");
 523 }
 524
 525 static void test_exec_passenvironment(Manager *m) {
 526         /* test-execute runs under MANAGER_USER which, by default, forwards all
 527          * variables present in the environment, but only those that are
 528          * present _at the time it is created_!
 529          *
 530          * So these PassEnvironment checks are still expected to work, since we
 531          * are ensuring the variables are not present at manager creation (they
 532          * are unset explicitly in main) and are only set here.
 533          *
 534          * This is still a good approximation of how a test for MANAGER_SYSTEM
 535          * would work.
 536          */
 537         assert_se(setenv("VAR1", "word1 word2", 1) == 0);
 538         assert_se(setenv("VAR2", "word3", 1) == 0);
 539         assert_se(setenv("VAR3", "$word 5 6", 1) == 0);
 540         assert_se(setenv("VAR4", "new\nline", 1) == 0);
 541         assert_se(setenv("VAR5", "passwordwithbackslashes", 1) == 0);
 542         test(m, "exec-passenvironment.service", 0, CLD_EXITED);
 543         test(m, "exec-passenvironment-repeated.service", 0, CLD_EXITED);
 544         test(m, "exec-passenvironment-empty.service", 0, CLD_EXITED);
 545         assert_se(unsetenv("VAR1") == 0);
 546         assert_se(unsetenv("VAR2") == 0);
 547         assert_se(unsetenv("VAR3") == 0);
 548         assert_se(unsetenv("VAR4") == 0);
 549         assert_se(unsetenv("VAR5") == 0);
 550         test(m, "exec-passenvironment-absent.service", 0, CLD_EXITED);
 551 }
 552
 553 static void test_exec_umask(Manager *m) {
 554         test(m, "exec-umask-default.service", 0, CLD_EXITED);
 555         test(m, "exec-umask-0177.service", 0, CLD_EXITED);
 556 }
 557
 558 static void test_exec_runtimedirectory(Manager *m) {
 559         test(m, "exec-runtimedirectory.service", 0, CLD_EXITED);
 560         test(m, "exec-runtimedirectory-mode.service", 0, CLD_EXITED);
 561         test(m, "exec-runtimedirectory-owner.service", 0, CLD_EXITED);
 562
 563         if (!check_nobody_user_and_group()) {
 564                 log_notice("nobody user/group is not synthesized or may conflict to other entries, skipping remaining tests in %s", __func__);
 565                 return;
 566         }
 567
 568         if (!STR_IN_SET(NOBODY_GROUP_NAME, "nobody", "nfsnobody", "nogroup")) {
 569                 log_notice("Unsupported nobody group name '%s', skipping remaining tests in %s", NOBODY_GROUP_NAME, __func__);
 570                 return;
 571         }
 572
 573         test(m, "exec-runtimedirectory-owner-" NOBODY_GROUP_NAME ".service", 0, CLD_EXITED);
 574 }
 575
 576 static void test_exec_capabilityboundingset(Manager *m) {
 577         int r;
 578
 579         r = find_binary("capsh", NULL);
 580         if (r < 0) {
 581                 log_notice_errno(r, "Skipping %s, could not find capsh binary: %m", __func__);
 582                 return;
 583         }
 584
 585         if (have_effective_cap(CAP_CHOWN) <= 0 ||
 586             have_effective_cap(CAP_FOWNER) <= 0 ||
 587             have_effective_cap(CAP_KILL) <= 0) {
 588                 log_notice("Skipping %s, this process does not have enough capabilities", __func__);
 589                 return;
 590         }
 591
 592         test(m, "exec-capabilityboundingset-simple.service", 0, CLD_EXITED);
 593         test(m, "exec-capabilityboundingset-reset.service", 0, CLD_EXITED);
 594         test(m, "exec-capabilityboundingset-merge.service", 0, CLD_EXITED);
 595         test(m, "exec-capabilityboundingset-invert.service", 0, CLD_EXITED);
 596 }
 597
 598 static void test_exec_basic(Manager *m) {
 599         test(m, "exec-basic.service", 0, CLD_EXITED);
 600 }
 601
 602 static void test_exec_ambientcapabilities(Manager *m) {
 603         int r;
 604
 605         /* Check if the kernel has support for ambient capabilities. Run
 606          * the tests only if that's the case. Clearing all ambient
 607          * capabilities is fine, since we are expecting them to be unset
 608          * in the first place for the tests. */
 609         r = prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_CLEAR_ALL, 0, 0, 0);
 610         if (r < 0 && IN_SET(errno, EINVAL, EOPNOTSUPP, ENOSYS)) {
 611                 log_notice("Skipping %s, the kernel does not support ambient capabilities", __func__);
 612                 return;
 613         }
 614
 615         if (have_effective_cap(CAP_CHOWN) <= 0 ||
 616             have_effective_cap(CAP_NET_RAW) <= 0) {
 617                 log_notice("Skipping %s, this process does not have enough capabilities", __func__);
 618                 return;
 619         }
 620
 621         test(m, "exec-ambientcapabilities.service", 0, CLD_EXITED);
 622         test(m, "exec-ambientcapabilities-merge.service", 0, CLD_EXITED);
 623
 624         if (!check_nobody_user_and_group()) {
 625                 log_notice("nobody user/group is not synthesized or may conflict to other entries, skipping remaining tests in %s", __func__);
 626                 return;
 627         }
 628
 629         if (!STR_IN_SET(NOBODY_USER_NAME, "nobody", "nfsnobody")) {
 630                 log_notice("Unsupported nobody user name '%s', skipping remaining tests in %s", NOBODY_USER_NAME, __func__);
 631                 return;
 632         }
 633
 634         test(m, "exec-ambientcapabilities-" NOBODY_USER_NAME ".service", 0, CLD_EXITED);
 635         test(m, "exec-ambientcapabilities-merge-" NOBODY_USER_NAME ".service", 0, CLD_EXITED);
 636 }
 637
 638 static void test_exec_privatenetwork(Manager *m) {
 639         int r;
 640
 641         r = find_binary("ip", NULL);
 642         if (r < 0) {
 643                 log_notice_errno(r, "Skipping %s, could not find ip binary: %m", __func__);
 644                 return;
 645         }
 646
 647         test(m, "exec-privatenetwork-yes.service", can_unshare ? 0 : EXIT_NETWORK, CLD_EXITED);
 648 }
 649
 650 static void test_exec_oomscoreadjust(Manager *m) {
 651         test(m, "exec-oomscoreadjust-positive.service", 0, CLD_EXITED);
 652
 653         if (detect_container() > 0) {
 654                 log_notice("Testing in container, skipping remaining tests in %s", __func__);
 655                 return;
 656         }
 657         test(m, "exec-oomscoreadjust-negative.service", 0, CLD_EXITED);
 658 }
 659
 660 static void test_exec_ioschedulingclass(Manager *m) {
 661         test(m, "exec-ioschedulingclass-none.service", 0, CLD_EXITED);
 662         test(m, "exec-ioschedulingclass-idle.service", 0, CLD_EXITED);
 663         test(m, "exec-ioschedulingclass-best-effort.service", 0, CLD_EXITED);
 664
 665         if (detect_container() > 0) {
 666                 log_notice("Testing in container, skipping remaining tests in %s", __func__);
 667                 return;
 668         }
 669         test(m, "exec-ioschedulingclass-realtime.service", 0, CLD_EXITED);
 670 }
 671
 672 static void test_exec_unsetenvironment(Manager *m) {
 673         test(m, "exec-unsetenvironment.service", 0, CLD_EXITED);
 674 }
 675
 676 static void test_exec_specifier(Manager *m) {
 677         test(m, "exec-specifier.service", 0, CLD_EXITED);
 678         test(m, "exec-specifier@foo-bar.service", 0, CLD_EXITED);
 679         test(m, "exec-specifier-interpolation.service", 0, CLD_EXITED);
 680 }
 681
 682 static void test_exec_standardinput(Manager *m) {
 683         test(m, "exec-standardinput-data.service", 0, CLD_EXITED);
 684         test(m, "exec-standardinput-file.service", 0, CLD_EXITED);
 685 }
 686
 687 static void test_exec_standardoutput(Manager *m) {
 688         test(m, "exec-standardoutput-file.service", 0, CLD_EXITED);
 689 }
 690
 691 static void test_exec_standardoutput_append(Manager *m) {
 692         test(m, "exec-standardoutput-append.service", 0, CLD_EXITED);
 693 }
 694
 695 static int run_tests(UnitFileScope scope, const test_function_t *tests) {
 696         const test_function_t *test = NULL;
 697         _cleanup_(manager_freep) Manager *m = NULL;
 698         int r;
 699
 700         assert_se(tests);
 701
 702         r = manager_new(scope, MANAGER_TEST_RUN_BASIC, &m);
 703         if (MANAGER_SKIP_TEST(r))
 704                 return log_tests_skipped_errno(r, "manager_new");
 705         assert_se(r >= 0);
 706         assert_se(manager_startup(m, NULL, NULL) >= 0);
 707
 708         for (test = tests; test && *test; test++)
 709                 (*test)(m);
 710
 711         return 0;
 712 }
 713
 714 int main(int argc, char *argv[]) {
 715         _cleanup_(rm_rf_physical_and_freep) char *runtime_dir = NULL;
 716         _cleanup_free_ char *test_execute_path = NULL;
 717         _cleanup_hashmap_free_ Hashmap *s = NULL;
 718         static const test_function_t user_tests[] = {
 719                 test_exec_basic,
 720                 test_exec_ambientcapabilities,
 721                 test_exec_bindpaths,
 722                 test_exec_capabilityboundingset,
 723                 test_exec_cpuaffinity,
 724                 test_exec_environment,
 725                 test_exec_environmentfile,
 726                 test_exec_group,
 727                 test_exec_ignoresigpipe,
 728                 test_exec_inaccessiblepaths,
 729                 test_exec_ioschedulingclass,
 730                 test_exec_oomscoreadjust,
 731                 test_exec_passenvironment,
 732                 test_exec_personality,
 733                 test_exec_privatedevices,
 734                 test_exec_privatenetwork,
 735                 test_exec_privatetmp,
 736                 test_exec_protectkernelmodules,
 737                 test_exec_readonlypaths,
 738                 test_exec_readwritepaths,
 739                 test_exec_restrictnamespaces,
 740                 test_exec_runtimedirectory,
 741                 test_exec_standardinput,
 742                 test_exec_standardoutput,
 743                 test_exec_standardoutput_append,
 744                 test_exec_supplementarygroups,
 745                 test_exec_systemcallerrornumber,
 746                 test_exec_systemcallfilter,
 747                 test_exec_temporaryfilesystem,
 748                 test_exec_umask,
 749                 test_exec_unsetenvironment,
 750                 test_exec_user,
 751                 test_exec_workingdirectory,
 752                 NULL,
 753         };
 754         static const test_function_t system_tests[] = {
 755                 test_exec_dynamicuser,
 756                 test_exec_specifier,
 757                 test_exec_systemcallfilter_system,
 758                 NULL,
 759         };
 760         int r;
 761
 762         test_setup_logging(LOG_DEBUG);
 763
 764 #if HAS_FEATURE_ADDRESS_SANITIZER
 765         if (is_run_on_travis_ci()) {
 766                 log_notice("Running on TravisCI under ASan, skipping, see https://github.com/systemd/systemd/issues/10696");
 767                 return EXIT_TEST_SKIP;
 768         }
 769 #endif
 770
 771         (void) unsetenv("USER");
 772         (void) unsetenv("LOGNAME");
 773         (void) unsetenv("SHELL");
 774         (void) unsetenv("HOME");
 775
 776         can_unshare = have_namespaces();
 777
 778         /* It is needed otherwise cgroup creation fails */
 779         if (getuid() != 0)
 780                 return log_tests_skipped("not root");
 781
 782         r = enter_cgroup_subroot();
 783         if (r == -ENOMEDIUM)
 784                 return log_tests_skipped("cgroupfs not available");
 785
 786         assert_se(runtime_dir = setup_fake_runtime_dir());
 787         test_execute_path = path_join(get_testdata_dir(), "test-execute");
 788         assert_se(set_unit_path(test_execute_path) >= 0);
 789
 790         /* Unset VAR1, VAR2 and VAR3 which are used in the PassEnvironment test
 791          * cases, otherwise (and if they are present in the environment),
 792          * `manager_default_environment` will copy them into the default
 793          * environment which is passed to each created job, which will make the
 794          * tests that expect those not to be present to fail.
 795          */
 796         assert_se(unsetenv("VAR1") == 0);
 797         assert_se(unsetenv("VAR2") == 0);
 798         assert_se(unsetenv("VAR3") == 0);
 799
 800         r = run_tests(UNIT_FILE_USER, user_tests);
 801         if (r != 0)
 802                 return r;
 803
 804         r = run_tests(UNIT_FILE_SYSTEM, system_tests);
 805         if (r != 0)
 806                 return r;
 807
 808 #if HAVE_SECCOMP
 809         /* The following tests are for 1beab8b0d0ff2d7d1436b52d4a0c3d56dc908962. */
 810         if (!is_seccomp_available()) {
 811                 log_notice("Seccomp not available, skipping unshare() filtered tests.");
 812                 return 0;
 813         }
 814
 815         assert_se(s = hashmap_new(NULL));
 816         r = seccomp_syscall_resolve_name("unshare");
 817         assert_se(r != __NR_SCMP_ERROR);
 818         assert_se(hashmap_put(s, UINT32_TO_PTR(r + 1), INT_TO_PTR(-1)) >= 0);
 819         assert_se(seccomp_load_syscall_filter_set_raw(SCMP_ACT_ALLOW, s, SCMP_ACT_ERRNO(EOPNOTSUPP), true) >= 0);
 820         assert_se(unshare(CLONE_NEWNS) < 0);
 821         assert_se(errno == EOPNOTSUPP);
 822
 823         can_unshare = false;
 824
 825         r = run_tests(UNIT_FILE_USER, user_tests);
 826         if (r != 0)
 827                 return r;
 828
 829         return run_tests(UNIT_FILE_SYSTEM, system_tests);
 830 #else
 831         return 0;
 832 #endif
 833 }