src/test/test-process-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <fcntl.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_sched.h"
  21 #include "missing_syscall.h"
  22 #include "parse-util.h"
  23 #include "process-util.h"
  24 #include "signal-util.h"
  25 #include "stdio-util.h"
  26 #include "string-util.h"
  27 #include "terminal-util.h"
  28 #include "test-helper.h"
  29 #include "tests.h"
  30 #include "util.h"
  31 #include "virt.h"
  32
  33 static void test_get_process_comm(pid_t pid) {
  34         struct stat st;
  35         _cleanup_free_ char *a = NULL, *c = NULL, *d = NULL, *f = NULL, *i = NULL;
  36         _cleanup_free_ char *env = NULL;
  37         char path[STRLEN("/proc//comm") + DECIMAL_STR_MAX(pid_t)];
  38         pid_t e;
  39         uid_t u;
  40         gid_t g;
  41         dev_t h;
  42         int r;
  43
  44         xsprintf(path, "/proc/"PID_FMT"/comm", pid);
  45
  46         if (stat(path, &st) == 0) {
  47                 assert_se(get_process_comm(pid, &a) >= 0);
  48                 log_info("PID"PID_FMT" comm: '%s'", pid, a);
  49         } else
  50                 log_warning("%s not exist.", path);
  51
  52         assert_se(get_process_cmdline(pid, 0, PROCESS_CMDLINE_COMM_FALLBACK, &c) >= 0);
  53         log_info("PID"PID_FMT" cmdline: '%s'", pid, c);
  54
  55         assert_se(get_process_cmdline(pid, 8, 0, &d) >= 0);
  56         log_info("PID"PID_FMT" cmdline truncated to 8: '%s'", pid, d);
  57
  58         free(d);
  59         assert_se(get_process_cmdline(pid, 1, 0, &d) >= 0);
  60         log_info("PID"PID_FMT" cmdline truncated to 1: '%s'", pid, d);
  61
  62         assert_se(get_process_ppid(pid, &e) >= 0);
  63         log_info("PID"PID_FMT" PPID: "PID_FMT, pid, e);
  64         assert_se(pid == 1 ? e == 0 : e > 0);
  65
  66         assert_se(is_kernel_thread(pid) == 0 || pid != 1);
  67
  68         r = get_process_exe(pid, &f);
  69         assert_se(r >= 0 || r == -EACCES);
  70         log_info("PID"PID_FMT" exe: '%s'", pid, strna(f));
  71
  72         assert_se(get_process_uid(pid, &u) == 0);
  73         log_info("PID"PID_FMT" UID: "UID_FMT, pid, u);
  74
  75         assert_se(get_process_gid(pid, &g) == 0);
  76         log_info("PID"PID_FMT" GID: "GID_FMT, pid, g);
  77
  78         r = get_process_environ(pid, &env);
  79         assert_se(r >= 0 || r == -EACCES);
  80         log_info("PID"PID_FMT" strlen(environ): %zi", pid, env ? (ssize_t)strlen(env) : (ssize_t)-errno);
  81
  82         if (!detect_container())
  83                 assert_se(get_ctty_devnr(pid, &h) == -ENXIO || pid != 1);
  84
  85         (void) getenv_for_pid(pid, "PATH", &i);
  86         log_info("PID"PID_FMT" $PATH: '%s'", pid, strna(i));
  87 }
  88
  89 static void test_get_process_comm_escape_one(const char *input, const char *output) {
  90         _cleanup_free_ char *n = NULL;
  91
  92         log_info("input: <%s> — output: <%s>", input, output);
  93
  94         assert_se(prctl(PR_SET_NAME, input) >= 0);
  95         assert_se(get_process_comm(0, &n) >= 0);
  96
  97         log_info("got: <%s>", n);
  98
  99         assert_se(streq_ptr(n, output));
 100 }
 101
 102 static void test_get_process_comm_escape(void) {
 103         _cleanup_free_ char *saved = NULL;
 104
 105         assert_se(get_process_comm(0, &saved) >= 0);
 106
 107         test_get_process_comm_escape_one("", "");
 108         test_get_process_comm_escape_one("foo", "foo");
 109         test_get_process_comm_escape_one("012345678901234", "012345678901234");
 110         test_get_process_comm_escape_one("0123456789012345", "012345678901234");
 111         test_get_process_comm_escape_one("äöüß", "\\303\\244\\303\\266\\303\\274\\303\\237");
 112         test_get_process_comm_escape_one("xäöüß", "x\\303\\244\\303\\266\\303\\274\\303\\237");
 113         test_get_process_comm_escape_one("xxäöüß", "xx\\303\\244\\303\\266\\303\\274\\303\\237");
 114         test_get_process_comm_escape_one("xxxäöüß", "xxx\\303\\244\\303\\266\\303\\274\\303\\237");
 115         test_get_process_comm_escape_one("xxxxäöüß", "xxxx\\303\\244\\303\\266\\303\\274\\303\\237");
 116         test_get_process_comm_escape_one("xxxxxäöüß", "xxxxx\\303\\244\\303\\266\\303\\274\\303\\237");
 117
 118         assert_se(prctl(PR_SET_NAME, saved) >= 0);
 119 }
 120
 121 static void test_pid_is_unwaited(void) {
 122         pid_t pid;
 123
 124         pid = fork();
 125         assert_se(pid >= 0);
 126         if (pid == 0) {
 127                 _exit(EXIT_SUCCESS);
 128         } else {
 129                 int status;
 130
 131                 waitpid(pid, &status, 0);
 132                 assert_se(!pid_is_unwaited(pid));
 133         }
 134         assert_se(pid_is_unwaited(getpid_cached()));
 135         assert_se(!pid_is_unwaited(-1));
 136 }
 137
 138 static void test_pid_is_alive(void) {
 139         pid_t pid;
 140
 141         pid = fork();
 142         assert_se(pid >= 0);
 143         if (pid == 0) {
 144                 _exit(EXIT_SUCCESS);
 145         } else {
 146                 int status;
 147
 148                 waitpid(pid, &status, 0);
 149                 assert_se(!pid_is_alive(pid));
 150         }
 151         assert_se(pid_is_alive(getpid_cached()));
 152         assert_se(!pid_is_alive(-1));
 153 }
 154
 155 static void test_personality(void) {
 156
 157         assert_se(personality_to_string(PER_LINUX));
 158         assert_se(!personality_to_string(PERSONALITY_INVALID));
 159
 160         assert_se(streq(personality_to_string(PER_LINUX), architecture_to_string(native_architecture())));
 161
 162         assert_se(personality_from_string(personality_to_string(PER_LINUX)) == PER_LINUX);
 163         assert_se(personality_from_string(architecture_to_string(native_architecture())) == PER_LINUX);
 164
 165 #ifdef __x86_64__
 166         assert_se(streq_ptr(personality_to_string(PER_LINUX), "x86-64"));
 167         assert_se(streq_ptr(personality_to_string(PER_LINUX32), "x86"));
 168
 169         assert_se(personality_from_string("x86-64") == PER_LINUX);
 170         assert_se(personality_from_string("x86") == PER_LINUX32);
 171         assert_se(personality_from_string("ia64") == PERSONALITY_INVALID);
 172         assert_se(personality_from_string(NULL) == PERSONALITY_INVALID);
 173
 174         assert_se(personality_from_string(personality_to_string(PER_LINUX32)) == PER_LINUX32);
 175 #endif
 176 }
 177
 178 static void test_get_process_cmdline_harder(void) {
 179         char path[] = "/tmp/test-cmdlineXXXXXX";
 180         _cleanup_close_ int fd = -1;
 181         _cleanup_free_ char *line = NULL;
 182         pid_t pid;
 183
 184         if (geteuid() != 0) {
 185                 log_info("Skipping %s: not root", __func__);
 186                 return;
 187         }
 188
 189         if (!have_namespaces()) {
 190                 log_notice("Testing without namespaces, skipping %s", __func__);
 191                 return;
 192         }
 193
 194 #if HAVE_VALGRIND_VALGRIND_H
 195         /* valgrind patches open(/proc//cmdline)
 196          * so, test_get_process_cmdline_harder fails always
 197          * See https://github.com/systemd/systemd/pull/3555#issuecomment-226564908 */
 198         if (RUNNING_ON_VALGRIND) {
 199                 log_info("Skipping %s: running on valgrind", __func__);
 200                 return;
 201         }
 202 #endif
 203
 204         pid = fork();
 205         if (pid > 0) {
 206                 siginfo_t si;
 207
 208                 (void) wait_for_terminate(pid, &si);
 209
 210                 assert_se(si.si_code == CLD_EXITED);
 211                 assert_se(si.si_status == 0);
 212
 213                 return;
 214         }
 215
 216         assert_se(pid == 0);
 217         assert_se(unshare(CLONE_NEWNS) >= 0);
 218
 219         if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL) < 0) {
 220                 log_warning_errno(errno, "mount(..., \"/\", MS_SLAVE|MS_REC, ...) failed: %m");
 221                 assert_se(IN_SET(errno, EPERM, EACCES));
 222                 return;
 223         }
 224
 225         fd = mkostemp(path, O_CLOEXEC);
 226         assert_se(fd >= 0);
 227
 228         /* Note that we don't unmount the following bind-mount at the end of the test because the kernel
 229          * will clear up its /proc/PID/ hierarchy automatically as soon as the test stops. */
 230         if (mount(path, "/proc/self/cmdline", "bind", MS_BIND, NULL) < 0) {
 231                 /* This happens under selinux… Abort the test in this case. */
 232                 log_warning_errno(errno, "mount(..., \"/proc/self/cmdline\", \"bind\", ...) failed: %m");
 233                 assert_se(IN_SET(errno, EPERM, EACCES));
 234                 return;
 235         }
 236
 237         assert_se(unlink(path) >= 0);
 238
 239         assert_se(prctl(PR_SET_NAME, "testa") >= 0);
 240
 241         assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, 0, &line) == -ENOENT);
 242
 243         assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 244         assert_se(streq(line, "[testa]"));
 245         line = mfree(line);
 246
 247         assert_se(get_process_cmdline(getpid_cached(), 0, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 248         log_info("'%s'", line);
 249         assert_se(streq(line, ""));
 250         line = mfree(line);
 251
 252         assert_se(get_process_cmdline(getpid_cached(), 1, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 253         assert_se(streq(line, "…"));
 254         line = mfree(line);
 255
 256         assert_se(get_process_cmdline(getpid_cached(), 2, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 257         assert_se(streq(line, "[…"));
 258         line = mfree(line);
 259
 260         assert_se(get_process_cmdline(getpid_cached(), 3, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 261         assert_se(streq(line, "[t…"));
 262         line = mfree(line);
 263
 264         assert_se(get_process_cmdline(getpid_cached(), 4, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 265         assert_se(streq(line, "[te…"));
 266         line = mfree(line);
 267
 268         assert_se(get_process_cmdline(getpid_cached(), 5, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 269         assert_se(streq(line, "[tes…"));
 270         line = mfree(line);
 271
 272         assert_se(get_process_cmdline(getpid_cached(), 6, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 273         assert_se(streq(line, "[test…"));
 274         line = mfree(line);
 275
 276         assert_se(get_process_cmdline(getpid_cached(), 7, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 277         assert_se(streq(line, "[testa]"));
 278         line = mfree(line);
 279
 280         assert_se(get_process_cmdline(getpid_cached(), 8, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 281         assert_se(streq(line, "[testa]"));
 282         line = mfree(line);
 283
 284         assert_se(write(fd, "foo\0bar", 8) == 8);
 285
 286         assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, 0, &line) >= 0);
 287         log_info("'%s'", line);
 288         assert_se(streq(line, "foo bar"));
 289         line = mfree(line);
 290
 291         assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 292         assert_se(streq(line, "foo bar"));
 293         line = mfree(line);
 294
 295         assert_se(write(fd, "quux", 4) == 4);
 296         assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, 0, &line) >= 0);
 297         log_info("'%s'", line);
 298         assert_se(streq(line, "foo bar quux"));
 299         line = mfree(line);
 300
 301         assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 302         assert_se(streq(line, "foo bar quux"));
 303         line = mfree(line);
 304
 305         assert_se(get_process_cmdline(getpid_cached(), 1, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 306         assert_se(streq(line, "…"));
 307         line = mfree(line);
 308
 309         assert_se(get_process_cmdline(getpid_cached(), 2, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 310         assert_se(streq(line, "f…"));
 311         line = mfree(line);
 312
 313         assert_se(get_process_cmdline(getpid_cached(), 3, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 314         assert_se(streq(line, "fo…"));
 315         line = mfree(line);
 316
 317         assert_se(get_process_cmdline(getpid_cached(), 4, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 318         assert_se(streq(line, "foo…"));
 319         line = mfree(line);
 320
 321         assert_se(get_process_cmdline(getpid_cached(), 5, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 322         assert_se(streq(line, "foo …"));
 323         line = mfree(line);
 324
 325         assert_se(get_process_cmdline(getpid_cached(), 6, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 326         assert_se(streq(line, "foo b…"));
 327         line = mfree(line);
 328
 329         assert_se(get_process_cmdline(getpid_cached(), 7, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 330         assert_se(streq(line, "foo ba…"));
 331         line = mfree(line);
 332
 333         assert_se(get_process_cmdline(getpid_cached(), 8, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 334         assert_se(streq(line, "foo bar…"));
 335         line = mfree(line);
 336
 337         assert_se(get_process_cmdline(getpid_cached(), 9, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 338         assert_se(streq(line, "foo bar …"));
 339         line = mfree(line);
 340
 341         assert_se(get_process_cmdline(getpid_cached(), 10, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 342         assert_se(streq(line, "foo bar q…"));
 343         line = mfree(line);
 344
 345         assert_se(get_process_cmdline(getpid_cached(), 11, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 346         assert_se(streq(line, "foo bar qu…"));
 347         line = mfree(line);
 348
 349         assert_se(get_process_cmdline(getpid_cached(), 12, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 350         assert_se(streq(line, "foo bar quux"));
 351         line = mfree(line);
 352
 353         assert_se(get_process_cmdline(getpid_cached(), 13, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 354         assert_se(streq(line, "foo bar quux"));
 355         line = mfree(line);
 356
 357         assert_se(get_process_cmdline(getpid_cached(), 14, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 358         assert_se(streq(line, "foo bar quux"));
 359         line = mfree(line);
 360
 361         assert_se(get_process_cmdline(getpid_cached(), 1000, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 362         assert_se(streq(line, "foo bar quux"));
 363         line = mfree(line);
 364
 365         assert_se(ftruncate(fd, 0) >= 0);
 366         assert_se(prctl(PR_SET_NAME, "aaaa bbbb cccc") >= 0);
 367
 368         assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, 0, &line) == -ENOENT);
 369
 370         assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 371         assert_se(streq(line, "[aaaa bbbb cccc]"));
 372         line = mfree(line);
 373
 374         assert_se(get_process_cmdline(getpid_cached(), 10, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 375         assert_se(streq(line, "[aaaa bbb…"));
 376         line = mfree(line);
 377
 378         assert_se(get_process_cmdline(getpid_cached(), 11, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 379         assert_se(streq(line, "[aaaa bbbb…"));
 380         line = mfree(line);
 381
 382         assert_se(get_process_cmdline(getpid_cached(), 12, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
 383         assert_se(streq(line, "[aaaa bbbb …"));
 384         line = mfree(line);
 385
 386         safe_close(fd);
 387         _exit(EXIT_SUCCESS);
 388 }
 389
 390 static void test_rename_process_now(const char *p, int ret) {
 391         _cleanup_free_ char *comm = NULL, *cmdline = NULL;
 392         int r;
 393
 394         r = rename_process(p);
 395         assert_se(r == ret ||
 396                   (ret == 0 && r >= 0) ||
 397                   (ret > 0 && r > 0));
 398
 399         if (r < 0)
 400                 return;
 401
 402 #if HAVE_VALGRIND_VALGRIND_H
 403         /* see above, valgrind is weird, we can't verify what we are doing here */
 404         if (RUNNING_ON_VALGRIND)
 405                 return;
 406 #endif
 407
 408         assert_se(get_process_comm(0, &comm) >= 0);
 409         log_info("comm = <%s>", comm);
 410         assert_se(strneq(comm, p, TASK_COMM_LEN-1));
 411         /* We expect comm to be at most 16 bytes (TASK_COMM_LEN). The kernel may raise this limit in the
 412          * future. We'd only check the initial part, at least until we recompile, but this will still pass. */
 413
 414         r = get_process_cmdline(0, SIZE_MAX, 0, &cmdline);
 415         assert_se(r >= 0);
 416         /* we cannot expect cmdline to be renamed properly without privileges */
 417         if (geteuid() == 0) {
 418                 if (r == 0 && detect_container() > 0)
 419                         log_info("cmdline = <%s> (not verified, Running in unprivileged container?)", cmdline);
 420                 else {
 421                         log_info("cmdline = <%s>", cmdline);
 422                         assert_se(strneq(p, cmdline, STRLEN("test-process-util")));
 423                         assert_se(startswith(p, cmdline));
 424                 }
 425         } else
 426                 log_info("cmdline = <%s> (not verified)", cmdline);
 427 }
 428
 429 static void test_rename_process_one(const char *p, int ret) {
 430         siginfo_t si;
 431         pid_t pid;
 432
 433         pid = fork();
 434         assert_se(pid >= 0);
 435
 436         if (pid == 0) {
 437                 /* child */
 438                 test_rename_process_now(p, ret);
 439                 _exit(EXIT_SUCCESS);
 440         }
 441
 442         assert_se(wait_for_terminate(pid, &si) >= 0);
 443         assert_se(si.si_code == CLD_EXITED);
 444         assert_se(si.si_status == EXIT_SUCCESS);
 445 }
 446
 447 static void test_rename_process_multi(void) {
 448         pid_t pid;
 449
 450         pid = fork();
 451         assert_se(pid >= 0);
 452
 453         if (pid > 0) {
 454                 siginfo_t si;
 455
 456                 assert_se(wait_for_terminate(pid, &si) >= 0);
 457                 assert_se(si.si_code == CLD_EXITED);
 458                 assert_se(si.si_status == EXIT_SUCCESS);
 459
 460                 return;
 461         }
 462
 463         /* child */
 464         test_rename_process_now("one", 1);
 465         test_rename_process_now("more", 0); /* longer than "one", hence truncated */
 466         (void) setresuid(99, 99, 99); /* change uid when running privileged */
 467         test_rename_process_now("time!", 0);
 468         test_rename_process_now("0", 1); /* shorter than "one", should fit */
 469         test_rename_process_one("", -EINVAL);
 470         test_rename_process_one(NULL, -EINVAL);
 471         _exit(EXIT_SUCCESS);
 472 }
 473
 474 static void test_rename_process(void) {
 475         test_rename_process_one(NULL, -EINVAL);
 476         test_rename_process_one("", -EINVAL);
 477         test_rename_process_one("foo", 1); /* should always fit */
 478         test_rename_process_one("this is a really really long process name, followed by some more words", 0); /* unlikely to fit */
 479         test_rename_process_one("1234567", 1); /* should always fit */
 480         test_rename_process_multi(); /* multiple invocations and dropped privileges */
 481 }
 482
 483 static void test_getpid_cached(void) {
 484         siginfo_t si;
 485         pid_t a, b, c, d, e, f, child;
 486
 487         a = raw_getpid();
 488         b = getpid_cached();
 489         c = getpid();
 490
 491         assert_se(a == b && a == c);
 492
 493         child = fork();
 494         assert_se(child >= 0);
 495
 496         if (child == 0) {
 497                 /* In child */
 498                 a = raw_getpid();
 499                 b = getpid_cached();
 500                 c = getpid();
 501
 502                 assert_se(a == b && a == c);
 503                 _exit(EXIT_SUCCESS);
 504         }
 505
 506         d = raw_getpid();
 507         e = getpid_cached();
 508         f = getpid();
 509
 510         assert_se(a == d && a == e && a == f);
 511
 512         assert_se(wait_for_terminate(child, &si) >= 0);
 513         assert_se(si.si_status == 0);
 514         assert_se(si.si_code == CLD_EXITED);
 515 }
 516
 517 #define MEASURE_ITERATIONS (10000000LLU)
 518
 519 static void test_getpid_measure(void) {
 520         unsigned long long i;
 521         usec_t t, q;
 522
 523         t = now(CLOCK_MONOTONIC);
 524         for (i = 0; i < MEASURE_ITERATIONS; i++)
 525                 (void) getpid();
 526         q = now(CLOCK_MONOTONIC) - t;
 527
 528         log_info(" glibc getpid(): %lf µs each\n", (double) q / MEASURE_ITERATIONS);
 529
 530         t = now(CLOCK_MONOTONIC);
 531         for (i = 0; i < MEASURE_ITERATIONS; i++)
 532                 (void) getpid_cached();
 533         q = now(CLOCK_MONOTONIC) - t;
 534
 535         log_info("getpid_cached(): %lf µs each\n", (double) q / MEASURE_ITERATIONS);
 536 }
 537
 538 static void test_safe_fork(void) {
 539         siginfo_t status;
 540         pid_t pid;
 541         int r;
 542
 543         BLOCK_SIGNALS(SIGCHLD);
 544
 545         r = safe_fork("(test-child)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG|FORK_NULL_STDIO|FORK_REOPEN_LOG, &pid);
 546         assert_se(r >= 0);
 547
 548         if (r == 0) {
 549                 /* child */
 550                 usleep(100 * USEC_PER_MSEC);
 551
 552                 _exit(88);
 553         }
 554
 555         assert_se(wait_for_terminate(pid, &status) >= 0);
 556         assert_se(status.si_code == CLD_EXITED);
 557         assert_se(status.si_status == 88);
 558 }
 559
 560 static void test_pid_to_ptr(void) {
 561
 562         assert_se(PTR_TO_PID(NULL) == 0);
 563         assert_se(PID_TO_PTR(0) == NULL);
 564
 565         assert_se(PTR_TO_PID(PID_TO_PTR(1)) == 1);
 566         assert_se(PTR_TO_PID(PID_TO_PTR(2)) == 2);
 567         assert_se(PTR_TO_PID(PID_TO_PTR(-1)) == -1);
 568         assert_se(PTR_TO_PID(PID_TO_PTR(-2)) == -2);
 569
 570         assert_se(PTR_TO_PID(PID_TO_PTR(INT16_MAX)) == INT16_MAX);
 571         assert_se(PTR_TO_PID(PID_TO_PTR(INT16_MIN)) == INT16_MIN);
 572
 573 #if SIZEOF_PID_T >= 4
 574         assert_se(PTR_TO_PID(PID_TO_PTR(INT32_MAX)) == INT32_MAX);
 575         assert_se(PTR_TO_PID(PID_TO_PTR(INT32_MIN)) == INT32_MIN);
 576 #endif
 577 }
 578
 579 static void test_ioprio_class_from_to_string_one(const char *val, int expected) {
 580         assert_se(ioprio_class_from_string(val) == expected);
 581         if (expected >= 0) {
 582                 _cleanup_free_ char *s = NULL;
 583                 unsigned ret;
 584
 585                 assert_se(ioprio_class_to_string_alloc(expected, &s) == 0);
 586                 /* We sometimes get a class number and sometimes a number back */
 587                 assert_se(streq(s, val) ||
 588                           safe_atou(val, &ret) == 0);
 589         }
 590 }
 591
 592 static void test_ioprio_class_from_to_string(void) {
 593         test_ioprio_class_from_to_string_one("none", IOPRIO_CLASS_NONE);
 594         test_ioprio_class_from_to_string_one("realtime", IOPRIO_CLASS_RT);
 595         test_ioprio_class_from_to_string_one("best-effort", IOPRIO_CLASS_BE);
 596         test_ioprio_class_from_to_string_one("idle", IOPRIO_CLASS_IDLE);
 597         test_ioprio_class_from_to_string_one("0", 0);
 598         test_ioprio_class_from_to_string_one("1", 1);
 599         test_ioprio_class_from_to_string_one("7", 7);
 600         test_ioprio_class_from_to_string_one("8", 8);
 601         test_ioprio_class_from_to_string_one("9", -1);
 602         test_ioprio_class_from_to_string_one("-1", -1);
 603 }
 604
 605 int main(int argc, char *argv[]) {
 606         test_setup_logging(LOG_DEBUG);
 607
 608         save_argc_argv(argc, argv);
 609
 610         if (argc > 1) {
 611                 pid_t pid = 0;
 612
 613                 (void) parse_pid(argv[1], &pid);
 614                 test_get_process_comm(pid);
 615         } else {
 616                 TEST_REQ_RUNNING_SYSTEMD(test_get_process_comm(1));
 617                 test_get_process_comm(getpid());
 618         }
 619
 620         test_get_process_comm_escape();
 621         test_pid_is_unwaited();
 622         test_pid_is_alive();
 623         test_personality();
 624         test_get_process_cmdline_harder();
 625         test_rename_process();
 626         test_getpid_cached();
 627         test_getpid_measure();
 628         test_safe_fork();
 629         test_pid_to_ptr();
 630         test_ioprio_class_from_to_string();
 631
 632         return 0;
 633 }