1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2010 Lennart Poettering
6 Copyright 2013 Thomas H.P. Andersen
10 #include <sys/mount.h>
11 #include <sys/personality.h>
12 #include <sys/prctl.h>
14 #include <sys/types.h>
17 #if HAVE_VALGRIND_VALGRIND_H
18 #include <valgrind/valgrind.h>
21 #include "alloc-util.h"
22 //#include "architecture.h"
26 #include "parse-util.h"
27 #include "process-util.h"
28 #include "signal-util.h"
29 #include "stdio-util.h"
30 #include "string-util.h"
31 #include "terminal-util.h"
32 #include "test-helper.h"
36 static void test_get_process_comm(pid_t pid) {
38 _cleanup_free_ char *a = NULL, *c = NULL, *d = NULL, *f = NULL, *i = NULL;
39 _cleanup_free_ char *env = NULL;
40 char path[STRLEN("/proc//comm") + DECIMAL_STR_MAX(pid_t)];
41 #if 0 /// UNNEEDED by elogind
49 xsprintf(path, "/proc/"PID_FMT"/comm", pid);
51 if (stat(path, &st) == 0) {
52 assert_se(get_process_comm(pid, &a) >= 0);
53 log_info("PID"PID_FMT" comm: '%s'", pid, a);
55 log_warning("%s not exist.", path);
57 assert_se(get_process_cmdline(pid, 0, true, &c) >= 0);
58 log_info("PID"PID_FMT" cmdline: '%s'", pid, c);
60 assert_se(get_process_cmdline(pid, 8, false, &d) >= 0);
61 log_info("PID"PID_FMT" cmdline truncated to 8: '%s'", pid, d);
64 assert_se(get_process_cmdline(pid, 1, false, &d) >= 0);
65 log_info("PID"PID_FMT" cmdline truncated to 1: '%s'", pid, d);
67 #if 0 /// UNNEEDED by elogind
68 assert_se(get_process_ppid(pid, &e) >= 0);
69 log_info("PID"PID_FMT" PPID: "PID_FMT, pid, e);
70 assert_se(pid == 1 ? e == 0 : e > 0);
73 assert_se(is_kernel_thread(pid) == 0 || pid != 1);
75 r = get_process_exe(pid, &f);
76 assert_se(r >= 0 || r == -EACCES);
77 log_info("PID"PID_FMT" exe: '%s'", pid, strna(f));
79 #if 0 /// UNNEEDED by elogind
80 assert_se(get_process_uid(pid, &u) == 0);
81 log_info("PID"PID_FMT" UID: "UID_FMT, pid, u);
82 assert_se(u == 0 || pid != 1);
84 assert_se(get_process_gid(pid, &g) == 0);
85 log_info("PID"PID_FMT" GID: "GID_FMT, pid, g);
86 assert_se(g == 0 || pid != 1);
88 r = get_process_environ(pid, &env);
89 assert_se(r >= 0 || r == -EACCES);
90 log_info("PID"PID_FMT" strlen(environ): %zi", pid, env ? (ssize_t)strlen(env) : (ssize_t)-errno);
93 if (!detect_container())
94 assert_se(get_ctty_devnr(pid, &h) == -ENXIO || pid != 1);
96 (void) getenv_for_pid(pid, "PATH", &i);
97 log_info("PID"PID_FMT" $PATH: '%s'", pid, strna(i));
100 static void test_pid_is_unwaited(void) {
110 waitpid(pid, &status, 0);
111 assert_se(!pid_is_unwaited(pid));
113 assert_se(pid_is_unwaited(getpid_cached()));
114 assert_se(!pid_is_unwaited(-1));
117 static void test_pid_is_alive(void) {
127 waitpid(pid, &status, 0);
128 assert_se(!pid_is_alive(pid));
130 assert_se(pid_is_alive(getpid_cached()));
131 assert_se(!pid_is_alive(-1));
134 #if 0 /// UNNEEDED by elogind
135 static void test_personality(void) {
137 assert_se(personality_to_string(PER_LINUX));
138 assert_se(!personality_to_string(PERSONALITY_INVALID));
140 assert_se(streq(personality_to_string(PER_LINUX), architecture_to_string(native_architecture())));
142 assert_se(personality_from_string(personality_to_string(PER_LINUX)) == PER_LINUX);
143 assert_se(personality_from_string(architecture_to_string(native_architecture())) == PER_LINUX);
146 assert_se(streq_ptr(personality_to_string(PER_LINUX), "x86-64"));
147 assert_se(streq_ptr(personality_to_string(PER_LINUX32), "x86"));
149 assert_se(personality_from_string("x86-64") == PER_LINUX);
150 assert_se(personality_from_string("x86") == PER_LINUX32);
151 assert_se(personality_from_string("ia64") == PERSONALITY_INVALID);
152 assert_se(personality_from_string(NULL) == PERSONALITY_INVALID);
154 assert_se(personality_from_string(personality_to_string(PER_LINUX32)) == PER_LINUX32);
159 static void test_get_process_cmdline_harder(void) {
160 char path[] = "/tmp/test-cmdlineXXXXXX";
161 _cleanup_close_ int fd = -1;
162 _cleanup_free_ char *line = NULL;
168 #if HAVE_VALGRIND_VALGRIND_H
169 /* valgrind patches open(/proc//cmdline)
170 * so, test_get_process_cmdline_harder fails always
171 * See https://github.com/systemd/systemd/pull/3555#issuecomment-226564908 */
172 if (RUNNING_ON_VALGRIND)
180 (void) wait_for_terminate(pid, &si);
182 assert_se(si.si_code == CLD_EXITED);
183 assert_se(si.si_status == 0);
189 assert_se(unshare(CLONE_NEWNS) >= 0);
191 assert_se(mount(NULL, "/", NULL, MS_PRIVATE|MS_REC, NULL) >= 0);
193 fd = mkostemp(path, O_CLOEXEC);
196 if (mount(path, "/proc/self/cmdline", "bind", MS_BIND, NULL) < 0) {
197 /* This happens under selinux… Abort the test in this case. */
198 log_warning_errno(errno, "mount(..., \"/proc/self/cmdline\", \"bind\", ...) failed: %m");
199 assert(errno == EACCES);
203 assert_se(unlink(path) >= 0);
205 assert_se(prctl(PR_SET_NAME, "testa") >= 0);
207 assert_se(get_process_cmdline(getpid_cached(), 0, false, &line) == -ENOENT);
209 assert_se(get_process_cmdline(getpid_cached(), 0, true, &line) >= 0);
210 assert_se(streq(line, "[testa]"));
213 assert_se(get_process_cmdline(getpid_cached(), 1, true, &line) >= 0);
214 assert_se(streq(line, ""));
217 assert_se(get_process_cmdline(getpid_cached(), 2, true, &line) >= 0);
218 assert_se(streq(line, "["));
221 assert_se(get_process_cmdline(getpid_cached(), 3, true, &line) >= 0);
222 assert_se(streq(line, "[."));
225 assert_se(get_process_cmdline(getpid_cached(), 4, true, &line) >= 0);
226 assert_se(streq(line, "[.."));
229 assert_se(get_process_cmdline(getpid_cached(), 5, true, &line) >= 0);
230 assert_se(streq(line, "[..."));
233 assert_se(get_process_cmdline(getpid_cached(), 6, true, &line) >= 0);
234 assert_se(streq(line, "[...]"));
237 assert_se(get_process_cmdline(getpid_cached(), 7, true, &line) >= 0);
238 assert_se(streq(line, "[t...]"));
241 assert_se(get_process_cmdline(getpid_cached(), 8, true, &line) >= 0);
242 assert_se(streq(line, "[testa]"));
245 assert_se(write(fd, "\0\0\0\0\0\0\0\0\0", 10) == 10);
247 assert_se(get_process_cmdline(getpid_cached(), 0, false, &line) == -ENOENT);
249 assert_se(get_process_cmdline(getpid_cached(), 0, true, &line) >= 0);
250 assert_se(streq(line, "[testa]"));
253 assert_se(write(fd, "foo\0bar\0\0\0\0\0", 10) == 10);
255 assert_se(get_process_cmdline(getpid_cached(), 0, false, &line) >= 0);
256 assert_se(streq(line, "foo bar"));
259 assert_se(get_process_cmdline(getpid_cached(), 0, true, &line) >= 0);
260 assert_se(streq(line, "foo bar"));
263 assert_se(write(fd, "quux", 4) == 4);
264 assert_se(get_process_cmdline(getpid_cached(), 0, false, &line) >= 0);
265 assert_se(streq(line, "foo bar quux"));
268 assert_se(get_process_cmdline(getpid_cached(), 0, true, &line) >= 0);
269 assert_se(streq(line, "foo bar quux"));
272 assert_se(get_process_cmdline(getpid_cached(), 1, true, &line) >= 0);
273 assert_se(streq(line, ""));
276 assert_se(get_process_cmdline(getpid_cached(), 2, true, &line) >= 0);
277 assert_se(streq(line, "."));
280 assert_se(get_process_cmdline(getpid_cached(), 3, true, &line) >= 0);
281 assert_se(streq(line, ".."));
284 assert_se(get_process_cmdline(getpid_cached(), 4, true, &line) >= 0);
285 assert_se(streq(line, "..."));
288 assert_se(get_process_cmdline(getpid_cached(), 5, true, &line) >= 0);
289 assert_se(streq(line, "f..."));
292 assert_se(get_process_cmdline(getpid_cached(), 6, true, &line) >= 0);
293 assert_se(streq(line, "fo..."));
296 assert_se(get_process_cmdline(getpid_cached(), 7, true, &line) >= 0);
297 assert_se(streq(line, "foo..."));
300 assert_se(get_process_cmdline(getpid_cached(), 8, true, &line) >= 0);
301 assert_se(streq(line, "foo..."));
304 assert_se(get_process_cmdline(getpid_cached(), 9, true, &line) >= 0);
305 assert_se(streq(line, "foo b..."));
308 assert_se(get_process_cmdline(getpid_cached(), 10, true, &line) >= 0);
309 assert_se(streq(line, "foo ba..."));
312 assert_se(get_process_cmdline(getpid_cached(), 11, true, &line) >= 0);
313 assert_se(streq(line, "foo bar..."));
316 assert_se(get_process_cmdline(getpid_cached(), 12, true, &line) >= 0);
317 assert_se(streq(line, "foo bar..."));
320 assert_se(get_process_cmdline(getpid_cached(), 13, true, &line) >= 0);
321 assert_se(streq(line, "foo bar quux"));
324 assert_se(get_process_cmdline(getpid_cached(), 14, true, &line) >= 0);
325 assert_se(streq(line, "foo bar quux"));
328 assert_se(get_process_cmdline(getpid_cached(), 1000, true, &line) >= 0);
329 assert_se(streq(line, "foo bar quux"));
332 assert_se(ftruncate(fd, 0) >= 0);
333 assert_se(prctl(PR_SET_NAME, "aaaa bbbb cccc") >= 0);
335 assert_se(get_process_cmdline(getpid_cached(), 0, false, &line) == -ENOENT);
337 assert_se(get_process_cmdline(getpid_cached(), 0, true, &line) >= 0);
338 assert_se(streq(line, "[aaaa bbbb cccc]"));
341 assert_se(get_process_cmdline(getpid_cached(), 10, true, &line) >= 0);
342 assert_se(streq(line, "[aaaa...]"));
345 assert_se(get_process_cmdline(getpid_cached(), 11, true, &line) >= 0);
346 assert_se(streq(line, "[aaaa...]"));
349 assert_se(get_process_cmdline(getpid_cached(), 12, true, &line) >= 0);
350 assert_se(streq(line, "[aaaa b...]"));
357 #if 0 /// UNNEEDED by elogind
358 static void test_rename_process_now(const char *p, int ret) {
359 _cleanup_free_ char *comm = NULL, *cmdline = NULL;
362 r = rename_process(p);
363 assert_se(r == ret ||
364 (ret == 0 && r >= 0) ||
370 #if HAVE_VALGRIND_VALGRIND_H
371 /* see above, valgrind is weird, we can't verify what we are doing here */
372 if (RUNNING_ON_VALGRIND)
376 assert_se(get_process_comm(0, &comm) >= 0);
377 log_info("comm = <%s>", comm);
378 assert_se(strneq(comm, p, TASK_COMM_LEN-1));
380 assert_se(get_process_cmdline(0, 0, false, &cmdline) >= 0);
381 /* we cannot expect cmdline to be renamed properly without privileges */
382 if (geteuid() == 0) {
383 log_info("cmdline = <%s>", cmdline);
384 assert_se(strneq(p, cmdline, STRLEN("test-process-util")));
385 assert_se(startswith(p, cmdline));
387 log_info("cmdline = <%s> (not verified)", cmdline);
390 static void test_rename_process_one(const char *p, int ret) {
399 test_rename_process_now(p, ret);
403 assert_se(wait_for_terminate(pid, &si) >= 0);
404 assert_se(si.si_code == CLD_EXITED);
405 assert_se(si.si_status == EXIT_SUCCESS);
408 static void test_rename_process_multi(void) {
417 assert_se(wait_for_terminate(pid, &si) >= 0);
418 assert_se(si.si_code == CLD_EXITED);
419 assert_se(si.si_status == EXIT_SUCCESS);
425 test_rename_process_now("one", 1);
426 test_rename_process_now("more", 0); /* longer than "one", hence truncated */
427 (void) setresuid(99, 99, 99); /* change uid when running privileged */
428 test_rename_process_now("time!", 0);
429 test_rename_process_now("0", 1); /* shorter than "one", should fit */
430 test_rename_process_one("", -EINVAL);
431 test_rename_process_one(NULL, -EINVAL);
435 static void test_rename_process(void) {
436 test_rename_process_one(NULL, -EINVAL);
437 test_rename_process_one("", -EINVAL);
438 test_rename_process_one("foo", 1); /* should always fit */
439 test_rename_process_one("this is a really really long process name, followed by some more words", 0); /* unlikely to fit */
440 test_rename_process_one("1234567", 1); /* should always fit */
441 test_rename_process_multi(); /* multiple invocations and dropped privileges */
445 static void test_getpid_cached(void) {
447 pid_t a, b, c, d, e, f, child;
453 assert_se(a == b && a == c);
456 assert_se(child >= 0);
464 assert_se(a == b && a == c);
472 assert_se(a == d && a == e && a == f);
474 assert_se(wait_for_terminate(child, &si) >= 0);
475 assert_se(si.si_status == 0);
476 assert_se(si.si_code == CLD_EXITED);
479 #define MEASURE_ITERATIONS (10000000LLU)
481 static void test_getpid_measure(void) {
482 unsigned long long i;
485 t = now(CLOCK_MONOTONIC);
486 for (i = 0; i < MEASURE_ITERATIONS; i++)
488 q = now(CLOCK_MONOTONIC) - t;
490 log_info(" glibc getpid(): %llu/s\n", (unsigned long long) (MEASURE_ITERATIONS*USEC_PER_SEC/q));
492 t = now(CLOCK_MONOTONIC);
493 for (i = 0; i < MEASURE_ITERATIONS; i++)
494 (void) getpid_cached();
495 q = now(CLOCK_MONOTONIC) - t;
497 log_info("getpid_cached(): %llu/s\n", (unsigned long long) (MEASURE_ITERATIONS*USEC_PER_SEC/q));
500 static void test_safe_fork(void) {
505 BLOCK_SIGNALS(SIGCHLD);
507 r = safe_fork("(test-child)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG|FORK_NULL_STDIO|FORK_REOPEN_LOG, &pid);
512 usleep(100 * USEC_PER_MSEC);
517 assert_se(wait_for_terminate(pid, &status) >= 0);
518 assert_se(status.si_code == CLD_EXITED);
519 assert_se(status.si_status == 88);
522 static void test_pid_to_ptr(void) {
524 assert_se(PTR_TO_PID(NULL) == 0);
525 assert_se(PID_TO_PTR(0) == NULL);
527 assert_se(PTR_TO_PID(PID_TO_PTR(1)) == 1);
528 assert_se(PTR_TO_PID(PID_TO_PTR(2)) == 2);
529 assert_se(PTR_TO_PID(PID_TO_PTR(-1)) == -1);
530 assert_se(PTR_TO_PID(PID_TO_PTR(-2)) == -2);
532 assert_se(PTR_TO_PID(PID_TO_PTR(INT16_MAX)) == INT16_MAX);
533 assert_se(PTR_TO_PID(PID_TO_PTR(INT16_MIN)) == INT16_MIN);
535 #if SIZEOF_PID_T >= 4
536 assert_se(PTR_TO_PID(PID_TO_PTR(INT32_MAX)) == INT32_MAX);
537 assert_se(PTR_TO_PID(PID_TO_PTR(INT32_MIN)) == INT32_MIN);
541 static void test_ioprio_class_from_to_string_one(const char *val, int expected) {
542 assert_se(ioprio_class_from_string(val) == expected);
544 _cleanup_free_ char *s = NULL;
547 assert_se(ioprio_class_to_string_alloc(expected, &s) == 0);
548 /* We sometimes get a class number and sometimes a number back */
549 assert_se(streq(s, val) ||
550 safe_atou(val, &ret) == 0);
554 static void test_ioprio_class_from_to_string(void) {
555 test_ioprio_class_from_to_string_one("none", IOPRIO_CLASS_NONE);
556 test_ioprio_class_from_to_string_one("realtime", IOPRIO_CLASS_RT);
557 test_ioprio_class_from_to_string_one("best-effort", IOPRIO_CLASS_BE);
558 test_ioprio_class_from_to_string_one("idle", IOPRIO_CLASS_IDLE);
559 test_ioprio_class_from_to_string_one("0", 0);
560 test_ioprio_class_from_to_string_one("1", 1);
561 test_ioprio_class_from_to_string_one("7", 7);
562 test_ioprio_class_from_to_string_one("8", 8);
563 test_ioprio_class_from_to_string_one("9", -1);
564 test_ioprio_class_from_to_string_one("-1", -1);
567 int main(int argc, char *argv[]) {
568 log_set_max_level(LOG_DEBUG);
569 log_parse_environment();
578 (void) parse_pid(argv[1], &pid);
579 test_get_process_comm(pid);
581 TEST_REQ_RUNNING_SYSTEMD(test_get_process_comm(1));
582 test_get_process_comm(getpid());
585 test_pid_is_unwaited();
587 #if 0 /// UNNEEDED by elogind
590 test_get_process_cmdline_harder();
591 #if 0 /// UNNEEDED by elogind
592 test_rename_process();
594 test_getpid_cached();
595 test_getpid_measure();
598 test_ioprio_class_from_to_string();