1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 Copyright 2013 Thomas H.P. Andersen
8 #include <sys/personality.h>
11 #include <sys/types.h>
14 #if HAVE_VALGRIND_VALGRIND_H
15 #include <valgrind/valgrind.h>
18 #include "alloc-util.h"
19 //#include "architecture.h"
23 #include "parse-util.h"
24 #include "process-util.h"
25 #include "signal-util.h"
26 #include "stdio-util.h"
27 #include "string-util.h"
28 #include "terminal-util.h"
29 #include "test-helper.h"
33 static void test_get_process_comm(pid_t pid) {
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 #if 0 /// UNNEEDED by elogind
46 xsprintf(path, "/proc/"PID_FMT"/comm", pid);
48 if (stat(path, &st) == 0) {
49 assert_se(get_process_comm(pid, &a) >= 0);
50 log_info("PID"PID_FMT" comm: '%s'", pid, a);
52 log_warning("%s not exist.", path);
54 assert_se(get_process_cmdline(pid, 0, true, &c) >= 0);
55 log_info("PID"PID_FMT" cmdline: '%s'", pid, c);
57 assert_se(get_process_cmdline(pid, 8, false, &d) >= 0);
58 log_info("PID"PID_FMT" cmdline truncated to 8: '%s'", pid, d);
61 assert_se(get_process_cmdline(pid, 1, false, &d) >= 0);
62 log_info("PID"PID_FMT" cmdline truncated to 1: '%s'", pid, d);
64 #if 0 /// UNNEEDED by elogind
65 assert_se(get_process_ppid(pid, &e) >= 0);
66 log_info("PID"PID_FMT" PPID: "PID_FMT, pid, e);
67 assert_se(pid == 1 ? e == 0 : e > 0);
70 assert_se(is_kernel_thread(pid) == 0 || pid != 1);
72 r = get_process_exe(pid, &f);
73 assert_se(r >= 0 || r == -EACCES);
74 log_info("PID"PID_FMT" exe: '%s'", pid, strna(f));
76 #if 0 /// UNNEEDED by elogind
77 assert_se(get_process_uid(pid, &u) == 0);
78 log_info("PID"PID_FMT" UID: "UID_FMT, pid, u);
79 assert_se(u == 0 || pid != 1);
81 assert_se(get_process_gid(pid, &g) == 0);
82 log_info("PID"PID_FMT" GID: "GID_FMT, pid, g);
83 assert_se(g == 0 || pid != 1);
85 r = get_process_environ(pid, &env);
86 assert_se(r >= 0 || r == -EACCES);
87 log_info("PID"PID_FMT" strlen(environ): %zi", pid, env ? (ssize_t)strlen(env) : (ssize_t)-errno);
90 if (!detect_container())
91 assert_se(get_ctty_devnr(pid, &h) == -ENXIO || pid != 1);
93 (void) getenv_for_pid(pid, "PATH", &i);
94 log_info("PID"PID_FMT" $PATH: '%s'", pid, strna(i));
97 static void test_get_process_comm_escape_one(const char *input, const char *output) {
98 _cleanup_free_ char *n = NULL;
100 log_info("input: <%s> — output: <%s>", input, output);
102 assert_se(prctl(PR_SET_NAME, input) >= 0);
103 assert_se(get_process_comm(0, &n) >= 0);
105 log_info("got: <%s>", n);
107 assert_se(streq_ptr(n, output));
110 static void test_get_process_comm_escape(void) {
111 _cleanup_free_ char *saved = NULL;
113 assert_se(get_process_comm(0, &saved) >= 0);
115 test_get_process_comm_escape_one("", "");
116 test_get_process_comm_escape_one("foo", "foo");
117 test_get_process_comm_escape_one("012345678901234", "012345678901234");
118 test_get_process_comm_escape_one("0123456789012345", "012345678901234");
119 test_get_process_comm_escape_one("äöüß", "\\303\\244\\303…");
120 test_get_process_comm_escape_one("xäöüß", "x\\303\\244…");
121 test_get_process_comm_escape_one("xxäöüß", "xx\\303\\244…");
122 test_get_process_comm_escape_one("xxxäöüß", "xxx\\303\\244…");
123 test_get_process_comm_escape_one("xxxxäöüß", "xxxx\\303\\244…");
124 test_get_process_comm_escape_one("xxxxxäöüß", "xxxxx\\303…");
126 assert_se(prctl(PR_SET_NAME, saved) >= 0);
129 static void test_pid_is_unwaited(void) {
139 waitpid(pid, &status, 0);
140 assert_se(!pid_is_unwaited(pid));
142 assert_se(pid_is_unwaited(getpid_cached()));
143 assert_se(!pid_is_unwaited(-1));
146 static void test_pid_is_alive(void) {
156 waitpid(pid, &status, 0);
157 assert_se(!pid_is_alive(pid));
159 assert_se(pid_is_alive(getpid_cached()));
160 assert_se(!pid_is_alive(-1));
163 #if 0 /// UNNEEDED by elogind
164 static void test_personality(void) {
166 assert_se(personality_to_string(PER_LINUX));
167 assert_se(!personality_to_string(PERSONALITY_INVALID));
169 assert_se(streq(personality_to_string(PER_LINUX), architecture_to_string(native_architecture())));
171 assert_se(personality_from_string(personality_to_string(PER_LINUX)) == PER_LINUX);
172 assert_se(personality_from_string(architecture_to_string(native_architecture())) == PER_LINUX);
175 assert_se(streq_ptr(personality_to_string(PER_LINUX), "x86-64"));
176 assert_se(streq_ptr(personality_to_string(PER_LINUX32), "x86"));
178 assert_se(personality_from_string("x86-64") == PER_LINUX);
179 assert_se(personality_from_string("x86") == PER_LINUX32);
180 assert_se(personality_from_string("ia64") == PERSONALITY_INVALID);
181 assert_se(personality_from_string(NULL) == PERSONALITY_INVALID);
183 assert_se(personality_from_string(personality_to_string(PER_LINUX32)) == PER_LINUX32);
188 static void test_get_process_cmdline_harder(void) {
189 char path[] = "/tmp/test-cmdlineXXXXXX";
190 _cleanup_close_ int fd = -1;
191 _cleanup_free_ char *line = NULL;
197 #if HAVE_VALGRIND_VALGRIND_H
198 /* valgrind patches open(/proc//cmdline)
199 * so, test_get_process_cmdline_harder fails always
200 * See https://github.com/systemd/systemd/pull/3555#issuecomment-226564908 */
201 if (RUNNING_ON_VALGRIND)
209 (void) wait_for_terminate(pid, &si);
211 assert_se(si.si_code == CLD_EXITED);
212 assert_se(si.si_status == 0);
218 assert_se(unshare(CLONE_NEWNS) >= 0);
220 assert_se(mount(NULL, "/", NULL, MS_PRIVATE|MS_REC, NULL) >= 0);
222 fd = mkostemp(path, O_CLOEXEC);
225 if (mount(path, "/proc/self/cmdline", "bind", MS_BIND, NULL) < 0) {
226 /* This happens under selinux… Abort the test in this case. */
227 log_warning_errno(errno, "mount(..., \"/proc/self/cmdline\", \"bind\", ...) failed: %m");
228 assert(errno == EACCES);
232 assert_se(unlink(path) >= 0);
234 assert_se(prctl(PR_SET_NAME, "testa") >= 0);
236 assert_se(get_process_cmdline(getpid_cached(), 0, false, &line) == -ENOENT);
238 assert_se(get_process_cmdline(getpid_cached(), 0, true, &line) >= 0);
239 assert_se(streq(line, "[testa]"));
242 assert_se(get_process_cmdline(getpid_cached(), 1, true, &line) >= 0);
243 assert_se(streq(line, ""));
246 assert_se(get_process_cmdline(getpid_cached(), 2, true, &line) >= 0);
247 assert_se(streq(line, "["));
250 assert_se(get_process_cmdline(getpid_cached(), 3, true, &line) >= 0);
251 assert_se(streq(line, "[."));
254 assert_se(get_process_cmdline(getpid_cached(), 4, true, &line) >= 0);
255 assert_se(streq(line, "[.."));
258 assert_se(get_process_cmdline(getpid_cached(), 5, true, &line) >= 0);
259 assert_se(streq(line, "[..."));
262 assert_se(get_process_cmdline(getpid_cached(), 6, true, &line) >= 0);
263 assert_se(streq(line, "[...]"));
266 assert_se(get_process_cmdline(getpid_cached(), 7, true, &line) >= 0);
267 assert_se(streq(line, "[t...]"));
270 assert_se(get_process_cmdline(getpid_cached(), 8, true, &line) >= 0);
271 assert_se(streq(line, "[testa]"));
274 assert_se(write(fd, "\0\0\0\0\0\0\0\0\0", 10) == 10);
276 assert_se(get_process_cmdline(getpid_cached(), 0, false, &line) == -ENOENT);
278 assert_se(get_process_cmdline(getpid_cached(), 0, true, &line) >= 0);
279 assert_se(streq(line, "[testa]"));
282 assert_se(write(fd, "foo\0bar\0\0\0\0\0", 10) == 10);
284 assert_se(get_process_cmdline(getpid_cached(), 0, false, &line) >= 0);
285 assert_se(streq(line, "foo bar"));
288 assert_se(get_process_cmdline(getpid_cached(), 0, true, &line) >= 0);
289 assert_se(streq(line, "foo bar"));
292 assert_se(write(fd, "quux", 4) == 4);
293 assert_se(get_process_cmdline(getpid_cached(), 0, false, &line) >= 0);
294 assert_se(streq(line, "foo bar quux"));
297 assert_se(get_process_cmdline(getpid_cached(), 0, true, &line) >= 0);
298 assert_se(streq(line, "foo bar quux"));
301 assert_se(get_process_cmdline(getpid_cached(), 1, true, &line) >= 0);
302 assert_se(streq(line, ""));
305 assert_se(get_process_cmdline(getpid_cached(), 2, true, &line) >= 0);
306 assert_se(streq(line, "."));
309 assert_se(get_process_cmdline(getpid_cached(), 3, true, &line) >= 0);
310 assert_se(streq(line, ".."));
313 assert_se(get_process_cmdline(getpid_cached(), 4, true, &line) >= 0);
314 assert_se(streq(line, "..."));
317 assert_se(get_process_cmdline(getpid_cached(), 5, true, &line) >= 0);
318 assert_se(streq(line, "f..."));
321 assert_se(get_process_cmdline(getpid_cached(), 6, true, &line) >= 0);
322 assert_se(streq(line, "fo..."));
325 assert_se(get_process_cmdline(getpid_cached(), 7, true, &line) >= 0);
326 assert_se(streq(line, "foo..."));
329 assert_se(get_process_cmdline(getpid_cached(), 8, true, &line) >= 0);
330 assert_se(streq(line, "foo..."));
333 assert_se(get_process_cmdline(getpid_cached(), 9, true, &line) >= 0);
334 assert_se(streq(line, "foo b..."));
337 assert_se(get_process_cmdline(getpid_cached(), 10, true, &line) >= 0);
338 assert_se(streq(line, "foo ba..."));
341 assert_se(get_process_cmdline(getpid_cached(), 11, true, &line) >= 0);
342 assert_se(streq(line, "foo bar..."));
345 assert_se(get_process_cmdline(getpid_cached(), 12, true, &line) >= 0);
346 assert_se(streq(line, "foo bar..."));
349 assert_se(get_process_cmdline(getpid_cached(), 13, true, &line) >= 0);
350 assert_se(streq(line, "foo bar quux"));
353 assert_se(get_process_cmdline(getpid_cached(), 14, true, &line) >= 0);
354 assert_se(streq(line, "foo bar quux"));
357 assert_se(get_process_cmdline(getpid_cached(), 1000, true, &line) >= 0);
358 assert_se(streq(line, "foo bar quux"));
361 assert_se(ftruncate(fd, 0) >= 0);
362 assert_se(prctl(PR_SET_NAME, "aaaa bbbb cccc") >= 0);
364 assert_se(get_process_cmdline(getpid_cached(), 0, false, &line) == -ENOENT);
366 assert_se(get_process_cmdline(getpid_cached(), 0, true, &line) >= 0);
367 assert_se(streq(line, "[aaaa bbbb cccc]"));
370 assert_se(get_process_cmdline(getpid_cached(), 10, true, &line) >= 0);
371 assert_se(streq(line, "[aaaa...]"));
374 assert_se(get_process_cmdline(getpid_cached(), 11, true, &line) >= 0);
375 assert_se(streq(line, "[aaaa...]"));
378 assert_se(get_process_cmdline(getpid_cached(), 12, true, &line) >= 0);
379 assert_se(streq(line, "[aaaa b...]"));
386 #if 0 /// UNNEEDED by elogind
387 static void test_rename_process_now(const char *p, int ret) {
388 _cleanup_free_ char *comm = NULL, *cmdline = NULL;
391 r = rename_process(p);
392 assert_se(r == ret ||
393 (ret == 0 && r >= 0) ||
399 #if HAVE_VALGRIND_VALGRIND_H
400 /* see above, valgrind is weird, we can't verify what we are doing here */
401 if (RUNNING_ON_VALGRIND)
405 assert_se(get_process_comm(0, &comm) >= 0);
406 log_info("comm = <%s>", comm);
407 assert_se(strneq(comm, p, TASK_COMM_LEN-1));
409 assert_se(get_process_cmdline(0, 0, false, &cmdline) >= 0);
410 /* we cannot expect cmdline to be renamed properly without privileges */
411 if (geteuid() == 0) {
412 log_info("cmdline = <%s>", cmdline);
413 assert_se(strneq(p, cmdline, STRLEN("test-process-util")));
414 assert_se(startswith(p, cmdline));
416 log_info("cmdline = <%s> (not verified)", cmdline);
419 static void test_rename_process_one(const char *p, int ret) {
428 test_rename_process_now(p, ret);
432 assert_se(wait_for_terminate(pid, &si) >= 0);
433 assert_se(si.si_code == CLD_EXITED);
434 assert_se(si.si_status == EXIT_SUCCESS);
437 static void test_rename_process_multi(void) {
446 assert_se(wait_for_terminate(pid, &si) >= 0);
447 assert_se(si.si_code == CLD_EXITED);
448 assert_se(si.si_status == EXIT_SUCCESS);
454 test_rename_process_now("one", 1);
455 test_rename_process_now("more", 0); /* longer than "one", hence truncated */
456 (void) setresuid(99, 99, 99); /* change uid when running privileged */
457 test_rename_process_now("time!", 0);
458 test_rename_process_now("0", 1); /* shorter than "one", should fit */
459 test_rename_process_one("", -EINVAL);
460 test_rename_process_one(NULL, -EINVAL);
464 static void test_rename_process(void) {
465 test_rename_process_one(NULL, -EINVAL);
466 test_rename_process_one("", -EINVAL);
467 test_rename_process_one("foo", 1); /* should always fit */
468 test_rename_process_one("this is a really really long process name, followed by some more words", 0); /* unlikely to fit */
469 test_rename_process_one("1234567", 1); /* should always fit */
470 test_rename_process_multi(); /* multiple invocations and dropped privileges */
474 static void test_getpid_cached(void) {
476 pid_t a, b, c, d, e, f, child;
482 assert_se(a == b && a == c);
485 assert_se(child >= 0);
493 assert_se(a == b && a == c);
501 assert_se(a == d && a == e && a == f);
503 assert_se(wait_for_terminate(child, &si) >= 0);
504 assert_se(si.si_status == 0);
505 assert_se(si.si_code == CLD_EXITED);
508 #define MEASURE_ITERATIONS (10000000LLU)
510 static void test_getpid_measure(void) {
511 unsigned long long i;
514 t = now(CLOCK_MONOTONIC);
515 for (i = 0; i < MEASURE_ITERATIONS; i++)
517 q = now(CLOCK_MONOTONIC) - t;
519 log_info(" glibc getpid(): %llu/s\n", (unsigned long long) (MEASURE_ITERATIONS*USEC_PER_SEC/q));
521 t = now(CLOCK_MONOTONIC);
522 for (i = 0; i < MEASURE_ITERATIONS; i++)
523 (void) getpid_cached();
524 q = now(CLOCK_MONOTONIC) - t;
526 log_info("getpid_cached(): %llu/s\n", (unsigned long long) (MEASURE_ITERATIONS*USEC_PER_SEC/q));
529 static void test_safe_fork(void) {
534 BLOCK_SIGNALS(SIGCHLD);
536 r = safe_fork("(test-child)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG|FORK_NULL_STDIO|FORK_REOPEN_LOG, &pid);
541 usleep(100 * USEC_PER_MSEC);
546 assert_se(wait_for_terminate(pid, &status) >= 0);
547 assert_se(status.si_code == CLD_EXITED);
548 assert_se(status.si_status == 88);
551 static void test_pid_to_ptr(void) {
553 assert_se(PTR_TO_PID(NULL) == 0);
554 assert_se(PID_TO_PTR(0) == NULL);
556 assert_se(PTR_TO_PID(PID_TO_PTR(1)) == 1);
557 assert_se(PTR_TO_PID(PID_TO_PTR(2)) == 2);
558 assert_se(PTR_TO_PID(PID_TO_PTR(-1)) == -1);
559 assert_se(PTR_TO_PID(PID_TO_PTR(-2)) == -2);
561 assert_se(PTR_TO_PID(PID_TO_PTR(INT16_MAX)) == INT16_MAX);
562 assert_se(PTR_TO_PID(PID_TO_PTR(INT16_MIN)) == INT16_MIN);
564 #if SIZEOF_PID_T >= 4
565 assert_se(PTR_TO_PID(PID_TO_PTR(INT32_MAX)) == INT32_MAX);
566 assert_se(PTR_TO_PID(PID_TO_PTR(INT32_MIN)) == INT32_MIN);
570 static void test_ioprio_class_from_to_string_one(const char *val, int expected) {
571 assert_se(ioprio_class_from_string(val) == expected);
573 _cleanup_free_ char *s = NULL;
576 assert_se(ioprio_class_to_string_alloc(expected, &s) == 0);
577 /* We sometimes get a class number and sometimes a number back */
578 assert_se(streq(s, val) ||
579 safe_atou(val, &ret) == 0);
583 static void test_ioprio_class_from_to_string(void) {
584 test_ioprio_class_from_to_string_one("none", IOPRIO_CLASS_NONE);
585 test_ioprio_class_from_to_string_one("realtime", IOPRIO_CLASS_RT);
586 test_ioprio_class_from_to_string_one("best-effort", IOPRIO_CLASS_BE);
587 test_ioprio_class_from_to_string_one("idle", IOPRIO_CLASS_IDLE);
588 test_ioprio_class_from_to_string_one("0", 0);
589 test_ioprio_class_from_to_string_one("1", 1);
590 test_ioprio_class_from_to_string_one("7", 7);
591 test_ioprio_class_from_to_string_one("8", 8);
592 test_ioprio_class_from_to_string_one("9", -1);
593 test_ioprio_class_from_to_string_one("-1", -1);
596 int main(int argc, char *argv[]) {
597 log_set_max_level(LOG_DEBUG);
598 log_parse_environment();
607 (void) parse_pid(argv[1], &pid);
608 test_get_process_comm(pid);
610 TEST_REQ_RUNNING_SYSTEMD(test_get_process_comm(1));
611 test_get_process_comm(getpid());
614 test_get_process_comm_escape();
615 test_pid_is_unwaited();
617 #if 0 /// UNNEEDED by elogind
620 test_get_process_cmdline_harder();
621 #if 0 /// UNNEEDED by elogind
622 test_rename_process();
624 test_getpid_cached();
625 test_getpid_measure();
628 test_ioprio_class_from_to_string();