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