src/test/test-process-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <sched.h>
   4 #include <sys/mount.h>
   5 #include <sys/personality.h>
   6 #include <sys/prctl.h>
   7 #include <sys/stat.h>
   8 #include <sys/types.h>
   9 #include <sys/wait.h>
  10 #include <unistd.h>
  11 #if HAVE_VALGRIND_VALGRIND_H
  12 #include <valgrind/valgrind.h>
  13 #endif
  14
  15 #include "alloc-util.h"
  16 #include "architecture.h"
  17 #include "fd-util.h"
  18 #include "log.h"
  19 #include "macro.h"
  20 #include "missing.h"
  21 #include "parse-util.h"
  22 #include "process-util.h"
  23 #include "signal-util.h"
  24 #include "stdio-util.h"
  25 #include "string-util.h"
  26 #include "terminal-util.h"
  27 #include "test-helper.h"
  28 #include "tests.h"
  29 #include "util.h"
  30 #include "virt.h"
  31
  32 static void test_get_process_comm(pid_t pid) {
  33         struct stat st;
  34         _cleanup_free_ char *a = NULL, *c = NULL, *d = NULL, *f = NULL, *i = NULL;
  35         _cleanup_free_ char *env = NULL;
  36         char path[STRLEN("/proc//comm") + DECIMAL_STR_MAX(pid_t)];
  37         pid_t e;
  38         uid_t u;
  39         gid_t g;
  40         dev_t h;
  41         int r;
  42
  43         xsprintf(path, "/proc/"PID_FMT"/comm", pid);
  44
  45         if (stat(path, &st) == 0) {
  46                 assert_se(get_process_comm(pid, &a) >= 0);
  47                 log_info("PID"PID_FMT" comm: '%s'", pid, a);
  48         } else
  49                 log_warning("%s not exist.", path);
  50
  51         assert_se(get_process_cmdline(pid, 0, PROCESS_CMDLINE_COMM_FALLBACK, &c) >= 0);
  52         log_info("PID"PID_FMT" cmdline: '%s'", pid, c);
  53
  54         assert_se(get_process_cmdline(pid, 8, 0, &d) >= 0);
  55         log_info("PID"PID_FMT" cmdline truncated to 8: '%s'", pid, d);
  56
  57         free(d);
  58         assert_se(get_process_cmdline(pid, 1, 0, &d) >= 0);
  59         log_info("PID"PID_FMT" cmdline truncated to 1: '%s'", pid, d);
  60
  61         assert_se(get_process_ppid(pid, &e) >= 0);
  62         log_info("PID"PID_FMT" PPID: "PID_FMT, pid, e);
  63         assert_se(pid == 1 ? e == 0 : e > 0);
  64
  65         assert_se(is_kernel_thread(pid) == 0 || pid != 1);
  66
  67         r = get_process_exe(pid, &f);
  68         assert_se(r >= 0 || r == -EACCES);
  69         log_info("PID"PID_FMT" exe: '%s'", pid, strna(f));
  70
  71         assert_se(get_process_uid(pid, &u) == 0);
  72         log_info("PID"PID_FMT" UID: "UID_FMT, pid, u);
  73
  74         assert_se(get_process_gid(pid, &g) == 0);
  75         log_info("PID"PID_FMT" GID: "GID_FMT, pid, g);
  76
  77         r = get_process_environ(pid, &env);
  78         assert_se(r >= 0 || r == -EACCES);
  79         log_info("PID"PID_FMT" strlen(environ): %zi", pid, env ? (ssize_t)strlen(env) : (ssize_t)-errno);
  80
  81         if (!detect_container())
  82                 assert_se(get_ctty_devnr(pid, &h) == -ENXIO || pid != 1);
  83
  84         (void) getenv_for_pid(pid, "PATH", &i);
  85         log_info("PID"PID_FMT" $PATH: '%s'", pid, strna(i));
  86 }
  87
  88 static void test_get_process_comm_escape_one(const char *input, const char *output) {
  89         _cleanup_free_ char *n = NULL;
  90
  91         log_info("input: <%s> — output: <%s>", input, output);
  92
  93         assert_se(prctl(PR_SET_NAME, input) >= 0);
  94         assert_se(get_process_comm(0, &n) >= 0);
  95
  96         log_info("got: <%s>", n);
  97
  98         assert_se(streq_ptr(n, output));
  99 }
 100
 101 static void test_get_process_comm_escape(void) {
 102         _cleanup_free_ char *saved = NULL;
 103
 104         assert_se(get_process_comm(0, &saved) >= 0);
 105
 106         test_get_process_comm_escape_one("", "");
 107         test_get_process_comm_escape_one("foo", "foo");
 108         test_get_process_comm_escape_one("012345678901234", "012345678901234");
 109         test_get_process_comm_escape_one("0123456789012345", "012345678901234");
 110         test_get_process_comm_escape_one("äöüß", "\\303\\244\\303\\266\\303\\274\\303\\237");
 111         test_get_process_comm_escape_one("xäöüß", "x\\303\\244\\303\\266\\303\\274\\303\\237");
 112         test_get_process_comm_escape_one("xxäöüß", "xx\\303\\244\\303\\266\\303\\274\\303\\237");
 113         test_get_process_comm_escape_one("xxxäöüß", "xxx\\303\\244\\303\\266\\303\\274\\303\\237");
 114         test_get_process_comm_escape_one("xxxxäöüß", "xxxx\\303\\244\\303\\266\\303\\274\\303\\237");
 115         test_get_process_comm_escape_one("xxxxxäöüß", "xxxxx\\303\\244\\303\\266\\303\\274\\303\\237");
 116
 117         assert_se(prctl(PR_SET_NAME, saved) >= 0);
 118 }
 119
 120 static void test_pid_is_unwaited(void) {
 121         pid_t pid;
 122
 123         pid = fork();
 124         assert_se(pid >= 0);
 125         if (pid == 0) {
 126                 _exit(EXIT_SUCCESS);
 127         } else {
 128                 int status;
 129
 130                 waitpid(pid, &status, 0);
 131                 assert_se(!pid_is_unwaited(pid));
 132         }
 133         assert_se(pid_is_unwaited(getpid_cached()));
 134         assert_se(!pid_is_unwaited(-1));
 135 }
 136
 137 static void test_pid_is_alive(void) {
 138         pid_t pid;
 139
 140         pid = fork();
 141         assert_se(pid >= 0);
 142         if (pid == 0) {
 143                 _exit(EXIT_SUCCESS);
 144         } else {
 145                 int status;
 146
 147                 waitpid(pid, &status, 0);
 148                 assert_se(!pid_is_alive(pid));
 149         }
 150         assert_se(pid_is_alive(getpid_cached()));
 151         assert_se(!pid_is_alive(-1));
 152 }
 153
 154 static void test_personality(void) {
 155
 156         assert_se(personality_to_string(PER_LINUX));
 157         assert_se(!personality_to_string(PERSONALITY_INVALID));
 158
 159         assert_se(streq(personality_to_string(PER_LINUX), architecture_to_string(native_architecture())));
 160
 161         assert_se(personality_from_string(personality_to_string(PER_LINUX)) == PER_LINUX);
 162         assert_se(personality_from_string(architecture_to_string(native_architecture())) == PER_LINUX);
 163
 164 #ifdef __x86_64__
 165         assert_se(streq_ptr(personality_to_string(PER_LINUX), "x86-64"));
 166         assert_se(streq_ptr(personality_to_string(PER_LINUX32), "x86"));
 167
 168         assert_se(personality_from_string("x86-64") == PER_LINUX);
 169         assert_se(personality_from_string("x86") == PER_LINUX32);
 170         assert_se(personality_from_string("ia64") == PERSONALITY_INVALID);
 171         assert_se(personality_from_string(NULL) == PERSONALITY_INVALID);
 172
 173         assert_se(personality_from_string(personality_to_string(PER_LINUX32)) == PER_LINUX32);
 174 #endif
 175 }
 176
 177 static void test_get_process_cmdline_harder(void) {
 178         char path[] = "/tmp/test-cmdlineXXXXXX";
 179         _cleanup_close_ int fd = -1;
 180         _cleanup_free_ char *line = NULL;
 181         pid_t pid;
 182
 183         if (geteuid() != 0) {
 184                 log_info("Skipping %s: not root", __func__);
 185                 return;
 186         }
 187
 188         if (!have_namespaces()) {
 189                 log_notice("Testing without namespaces, skipping %s", __func__);
 190                 return;
 191         }
 192
 193 #if HAVE_VALGRIND_VALGRIND_H
 194         /* valgrind patches open(/proc//cmdline)
 195          * so, test_get_process_cmdline_harder fails always
 196          * See https://github.com/systemd/systemd/pull/3555#issuecomment-226564908 */
 197         if (RUNNING_ON_VALGRIND) {
 198                 log_info("Skipping %s: running on valgrind", __func__);
 199                 return;
 200         }
 201 #endif
 202
 203         pid = fork();
 204         if (pid > 0) {
 205                 siginfo_t si;
 206
 207                 (void) wait_for_terminate(pid, &si);
 208
 209                 assert_se(si.si_code == CLD_EXITED);
 210                 assert_se(si.si_status == 0);
 211
 212                 return;
 213         }
 214
 215         assert_se(pid == 0);
 216         assert_se(unshare(CLONE_NEWNS) >= 0);
 217
 218         if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL) < 0) {
 219                 log_warning_errno(errno, "mount(..., \"/\", MS_SLAVE|MS_REC, ...) failed: %m");
 220                 assert_se(IN_SET(errno, EPERM, EACCES));
 221                 return;
 222         }
 223
 224         fd = mkostemp(path, O_CLOEXEC);
 225         assert_se(fd >= 0);
 226
 227         /* Note that we don't unmount the following bind-mount at the end of the test because the kernel
 228          * will clear up its /proc/PID/ hierarchy automatically as soon as the test stops. */
 229         if (mount(path, "/proc/self/cmdline", "bind", MS_BIND, NULL) < 0) {
 230                 /* This happens under selinux… Abort the test in this case. */
 231                 log_warning_errno(errno, "mount(..., \"/proc/self/cmdline\", \"bind\", ...) failed: %m");
 232                 assert_se(IN_SET(errno, EPERM, EACCES));
 233                 return;
 234         }
 235
 236         assert_se(unlink(path) >= 0);
 237
 238         assert_se(prctl(PR_SET_NAME, "testa") >= 0);
 239
 240         assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, 0, &line) == -ENOENT);
 241
 242         assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 243         assert_se(streq(line, "[testa]"));
 244         line = mfree(line);
 245
 246         assert_se(get_process_cmdline(getpid_cached(), 0, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 247         log_info("'%s'", line);
 248         assert_se(streq(line, ""));
 249         line = mfree(line);
 250
 251         assert_se(get_process_cmdline(getpid_cached(), 1, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 252         assert_se(streq(line, "…"));
 253         line = mfree(line);
 254
 255         assert_se(get_process_cmdline(getpid_cached(), 2, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 256         assert_se(streq(line, "[…"));
 257         line = mfree(line);
 258
 259         assert_se(get_process_cmdline(getpid_cached(), 3, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 260         assert_se(streq(line, "[t…"));
 261         line = mfree(line);
 262
 263         assert_se(get_process_cmdline(getpid_cached(), 4, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 264         assert_se(streq(line, "[te…"));
 265         line = mfree(line);
 266
 267         assert_se(get_process_cmdline(getpid_cached(), 5, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 268         assert_se(streq(line, "[tes…"));
 269         line = mfree(line);
 270
 271         assert_se(get_process_cmdline(getpid_cached(), 6, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 272         assert_se(streq(line, "[test…"));
 273         line = mfree(line);
 274
 275         assert_se(get_process_cmdline(getpid_cached(), 7, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 276         assert_se(streq(line, "[testa]"));
 277         line = mfree(line);
 278
 279         assert_se(get_process_cmdline(getpid_cached(), 8, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 280         assert_se(streq(line, "[testa]"));
 281         line = mfree(line);
 282
 283         assert_se(write(fd, "foo\0bar", 8) == 8);
 284
 285         assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, 0, &line) >= 0);
 286         log_info("'%s'", line);
 287         assert_se(streq(line, "foo bar"));
 288         line = mfree(line);
 289
 290         assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 291         assert_se(streq(line, "foo bar"));
 292         line = mfree(line);
 293
 294         assert_se(write(fd, "quux", 4) == 4);
 295         assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, 0, &line) >= 0);
 296         log_info("'%s'", line);
 297         assert_se(streq(line, "foo bar quux"));
 298         line = mfree(line);
 299
 300         assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 301         assert_se(streq(line, "foo bar quux"));
 302         line = mfree(line);
 303
 304         assert_se(get_process_cmdline(getpid_cached(), 1, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 305         assert_se(streq(line, "…"));
 306         line = mfree(line);
 307
 308         assert_se(get_process_cmdline(getpid_cached(), 2, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 309         assert_se(streq(line, "f…"));
 310         line = mfree(line);
 311
 312         assert_se(get_process_cmdline(getpid_cached(), 3, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 313         assert_se(streq(line, "fo…"));
 314         line = mfree(line);
 315
 316         assert_se(get_process_cmdline(getpid_cached(), 4, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 317         assert_se(streq(line, "foo…"));
 318         line = mfree(line);
 319
 320         assert_se(get_process_cmdline(getpid_cached(), 5, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 321         assert_se(streq(line, "foo …"));
 322         line = mfree(line);
 323
 324         assert_se(get_process_cmdline(getpid_cached(), 6, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 325         assert_se(streq(line, "foo b…"));
 326         line = mfree(line);
 327
 328         assert_se(get_process_cmdline(getpid_cached(), 7, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 329         assert_se(streq(line, "foo ba…"));
 330         line = mfree(line);
 331
 332         assert_se(get_process_cmdline(getpid_cached(), 8, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 333         assert_se(streq(line, "foo bar…"));
 334         line = mfree(line);
 335
 336         assert_se(get_process_cmdline(getpid_cached(), 9, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 337         assert_se(streq(line, "foo bar …"));
 338         line = mfree(line);
 339
 340         assert_se(get_process_cmdline(getpid_cached(), 10, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 341         assert_se(streq(line, "foo bar q…"));
 342         line = mfree(line);
 343
 344         assert_se(get_process_cmdline(getpid_cached(), 11, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 345         assert_se(streq(line, "foo bar qu…"));
 346         line = mfree(line);
 347
 348         assert_se(get_process_cmdline(getpid_cached(), 12, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 349         assert_se(streq(line, "foo bar quux"));
 350         line = mfree(line);
 351
 352         assert_se(get_process_cmdline(getpid_cached(), 13, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 353         assert_se(streq(line, "foo bar quux"));
 354         line = mfree(line);
 355
 356         assert_se(get_process_cmdline(getpid_cached(), 14, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 357         assert_se(streq(line, "foo bar quux"));
 358         line = mfree(line);
 359
 360         assert_se(get_process_cmdline(getpid_cached(), 1000, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 361         assert_se(streq(line, "foo bar quux"));
 362         line = mfree(line);
 363
 364         assert_se(ftruncate(fd, 0) >= 0);
 365         assert_se(prctl(PR_SET_NAME, "aaaa bbbb cccc") >= 0);
 366
 367         assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, 0, &line) == -ENOENT);
 368
 369         assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 370         assert_se(streq(line, "[aaaa bbbb cccc]"));
 371         line = mfree(line);
 372
 373         assert_se(get_process_cmdline(getpid_cached(), 10, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 374         assert_se(streq(line, "[aaaa bbb…"));
 375         line = mfree(line);
 376
 377         assert_se(get_process_cmdline(getpid_cached(), 11, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 378         assert_se(streq(line, "[aaaa bbbb…"));
 379         line = mfree(line);
 380
 381         assert_se(get_process_cmdline(getpid_cached(), 12, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 382         assert_se(streq(line, "[aaaa bbbb …"));
 383         line = mfree(line);
 384
 385         safe_close(fd);
 386         _exit(EXIT_SUCCESS);
 387 }
 388
 389 static void test_rename_process_now(const char *p, int ret) {
 390         _cleanup_free_ char *comm = NULL, *cmdline = NULL;
 391         int r;
 392
 393         r = rename_process(p);
 394         assert_se(r == ret ||
 395                   (ret == 0 && r >= 0) ||
 396                   (ret > 0 && r > 0));
 397
 398         if (r < 0)
 399                 return;
 400
 401 #if HAVE_VALGRIND_VALGRIND_H
 402         /* see above, valgrind is weird, we can't verify what we are doing here */
 403         if (RUNNING_ON_VALGRIND)
 404                 return;
 405 #endif
 406
 407         assert_se(get_process_comm(0, &comm) >= 0);
 408         log_info("comm = <%s>", comm);
 409         assert_se(strneq(comm, p, TASK_COMM_LEN-1));
 410         /* We expect comm to be at most 16 bytes (TASK_COMM_LEN). The kernel may raise this limit in the
 411          * future. We'd only check the initial part, at least until we recompile, but this will still pass. */
 412
 413         r = get_process_cmdline(0, SIZE_MAX, 0, &cmdline);
 414         assert_se(r >= 0);
 415         /* we cannot expect cmdline to be renamed properly without privileges */
 416         if (geteuid() == 0) {
 417                 if (r == 0 && detect_container() > 0)
 418                         log_info("cmdline = <%s> (not verified, Running in unprivileged container?)", cmdline);
 419                 else {
 420                         log_info("cmdline = <%s>", cmdline);
 421                         assert_se(strneq(p, cmdline, STRLEN("test-process-util")));
 422                         assert_se(startswith(p, cmdline));
 423                 }
 424         } else
 425                 log_info("cmdline = <%s> (not verified)", cmdline);
 426 }
 427
 428 static void test_rename_process_one(const char *p, int ret) {
 429         siginfo_t si;
 430         pid_t pid;
 431
 432         pid = fork();
 433         assert_se(pid >= 0);
 434
 435         if (pid == 0) {
 436                 /* child */
 437                 test_rename_process_now(p, ret);
 438                 _exit(EXIT_SUCCESS);
 439         }
 440
 441         assert_se(wait_for_terminate(pid, &si) >= 0);
 442         assert_se(si.si_code == CLD_EXITED);
 443         assert_se(si.si_status == EXIT_SUCCESS);
 444 }
 445
 446 static void test_rename_process_multi(void) {
 447         pid_t pid;
 448
 449         pid = fork();
 450         assert_se(pid >= 0);
 451
 452         if (pid > 0) {
 453                 siginfo_t si;
 454
 455                 assert_se(wait_for_terminate(pid, &si) >= 0);
 456                 assert_se(si.si_code == CLD_EXITED);
 457                 assert_se(si.si_status == EXIT_SUCCESS);
 458
 459                 return;
 460         }
 461
 462         /* child */
 463         test_rename_process_now("one", 1);
 464         test_rename_process_now("more", 0); /* longer than "one", hence truncated */
 465         (void) setresuid(99, 99, 99); /* change uid when running privileged */
 466         test_rename_process_now("time!", 0);
 467         test_rename_process_now("0", 1); /* shorter than "one", should fit */
 468         test_rename_process_one("", -EINVAL);
 469         test_rename_process_one(NULL, -EINVAL);
 470         _exit(EXIT_SUCCESS);
 471 }
 472
 473 static void test_rename_process(void) {
 474         test_rename_process_one(NULL, -EINVAL);
 475         test_rename_process_one("", -EINVAL);
 476         test_rename_process_one("foo", 1); /* should always fit */
 477         test_rename_process_one("this is a really really long process name, followed by some more words", 0); /* unlikely to fit */
 478         test_rename_process_one("1234567", 1); /* should always fit */
 479         test_rename_process_multi(); /* multiple invocations and dropped privileges */
 480 }
 481
 482 static void test_getpid_cached(void) {
 483         siginfo_t si;
 484         pid_t a, b, c, d, e, f, child;
 485
 486         a = raw_getpid();
 487         b = getpid_cached();
 488         c = getpid();
 489
 490         assert_se(a == b && a == c);
 491
 492         child = fork();
 493         assert_se(child >= 0);
 494
 495         if (child == 0) {
 496                 /* In child */
 497                 a = raw_getpid();
 498                 b = getpid_cached();
 499                 c = getpid();
 500
 501                 assert_se(a == b && a == c);
 502                 _exit(EXIT_SUCCESS);
 503         }
 504
 505         d = raw_getpid();
 506         e = getpid_cached();
 507         f = getpid();
 508
 509         assert_se(a == d && a == e && a == f);
 510
 511         assert_se(wait_for_terminate(child, &si) >= 0);
 512         assert_se(si.si_status == 0);
 513         assert_se(si.si_code == CLD_EXITED);
 514 }
 515
 516 #define MEASURE_ITERATIONS (10000000LLU)
 517
 518 static void test_getpid_measure(void) {
 519         unsigned long long i;
 520         usec_t t, q;
 521
 522         t = now(CLOCK_MONOTONIC);
 523         for (i = 0; i < MEASURE_ITERATIONS; i++)
 524                 (void) getpid();
 525         q = now(CLOCK_MONOTONIC) - t;
 526
 527         log_info(" glibc getpid(): %llu/s\n", (unsigned long long) (MEASURE_ITERATIONS*USEC_PER_SEC/q));
 528
 529         t = now(CLOCK_MONOTONIC);
 530         for (i = 0; i < MEASURE_ITERATIONS; i++)
 531                 (void) getpid_cached();
 532         q = now(CLOCK_MONOTONIC) - t;
 533
 534         log_info("getpid_cached(): %llu/s\n", (unsigned long long) (MEASURE_ITERATIONS*USEC_PER_SEC/q));
 535 }
 536
 537 static void test_safe_fork(void) {
 538         siginfo_t status;
 539         pid_t pid;
 540         int r;
 541
 542         BLOCK_SIGNALS(SIGCHLD);
 543
 544         r = safe_fork("(test-child)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG|FORK_NULL_STDIO|FORK_REOPEN_LOG, &pid);
 545         assert_se(r >= 0);
 546
 547         if (r == 0) {
 548                 /* child */
 549                 usleep(100 * USEC_PER_MSEC);
 550
 551                 _exit(88);
 552         }
 553
 554         assert_se(wait_for_terminate(pid, &status) >= 0);
 555         assert_se(status.si_code == CLD_EXITED);
 556         assert_se(status.si_status == 88);
 557 }
 558
 559 static void test_pid_to_ptr(void) {
 560
 561         assert_se(PTR_TO_PID(NULL) == 0);
 562         assert_se(PID_TO_PTR(0) == NULL);
 563
 564         assert_se(PTR_TO_PID(PID_TO_PTR(1)) == 1);
 565         assert_se(PTR_TO_PID(PID_TO_PTR(2)) == 2);
 566         assert_se(PTR_TO_PID(PID_TO_PTR(-1)) == -1);
 567         assert_se(PTR_TO_PID(PID_TO_PTR(-2)) == -2);
 568
 569         assert_se(PTR_TO_PID(PID_TO_PTR(INT16_MAX)) == INT16_MAX);
 570         assert_se(PTR_TO_PID(PID_TO_PTR(INT16_MIN)) == INT16_MIN);
 571
 572 #if SIZEOF_PID_T >= 4
 573         assert_se(PTR_TO_PID(PID_TO_PTR(INT32_MAX)) == INT32_MAX);
 574         assert_se(PTR_TO_PID(PID_TO_PTR(INT32_MIN)) == INT32_MIN);
 575 #endif
 576 }
 577
 578 static void test_ioprio_class_from_to_string_one(const char *val, int expected) {
 579         assert_se(ioprio_class_from_string(val) == expected);
 580         if (expected >= 0) {
 581                 _cleanup_free_ char *s = NULL;
 582                 unsigned ret;
 583
 584                 assert_se(ioprio_class_to_string_alloc(expected, &s) == 0);
 585                 /* We sometimes get a class number and sometimes a number back */
 586                 assert_se(streq(s, val) ||
 587                           safe_atou(val, &ret) == 0);
 588         }
 589 }
 590
 591 static void test_ioprio_class_from_to_string(void) {
 592         test_ioprio_class_from_to_string_one("none", IOPRIO_CLASS_NONE);
 593         test_ioprio_class_from_to_string_one("realtime", IOPRIO_CLASS_RT);
 594         test_ioprio_class_from_to_string_one("best-effort", IOPRIO_CLASS_BE);
 595         test_ioprio_class_from_to_string_one("idle", IOPRIO_CLASS_IDLE);
 596         test_ioprio_class_from_to_string_one("0", 0);
 597         test_ioprio_class_from_to_string_one("1", 1);
 598         test_ioprio_class_from_to_string_one("7", 7);
 599         test_ioprio_class_from_to_string_one("8", 8);
 600         test_ioprio_class_from_to_string_one("9", -1);
 601         test_ioprio_class_from_to_string_one("-1", -1);
 602 }
 603
 604 int main(int argc, char *argv[]) {
 605         test_setup_logging(LOG_DEBUG);
 606
 607         save_argc_argv(argc, argv);
 608
 609         if (argc > 1) {
 610                 pid_t pid = 0;
 611
 612                 (void) parse_pid(argv[1], &pid);
 613                 test_get_process_comm(pid);
 614         } else {
 615                 TEST_REQ_RUNNING_SYSTEMD(test_get_process_comm(1));
 616                 test_get_process_comm(getpid());
 617         }
 618
 619         test_get_process_comm_escape();
 620         test_pid_is_unwaited();
 621         test_pid_is_alive();
 622         test_personality();
 623         test_get_process_cmdline_harder();
 624         test_rename_process();
 625         test_getpid_cached();
 626         test_getpid_measure();
 627         test_safe_fork();
 628         test_pid_to_ptr();
 629         test_ioprio_class_from_to_string();
 630
 631         return 0;
 632 }