Line data Source code
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 2 : static void test_get_process_comm(pid_t pid) {
33 : struct stat st;
34 2 : _cleanup_free_ char *a = NULL, *c = NULL, *d = NULL, *f = NULL, *i = NULL;
35 4 : _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 2 : xsprintf(path, "/proc/"PID_FMT"/comm", pid);
44 :
45 2 : if (stat(path, &st) == 0) {
46 2 : assert_se(get_process_comm(pid, &a) >= 0);
47 2 : log_info("PID"PID_FMT" comm: '%s'", pid, a);
48 : } else
49 0 : log_warning("%s not exist.", path);
50 :
51 2 : assert_se(get_process_cmdline(pid, 0, PROCESS_CMDLINE_COMM_FALLBACK, &c) >= 0);
52 2 : log_info("PID"PID_FMT" cmdline: '%s'", pid, c);
53 :
54 2 : assert_se(get_process_cmdline(pid, 8, 0, &d) >= 0);
55 2 : log_info("PID"PID_FMT" cmdline truncated to 8: '%s'", pid, d);
56 :
57 2 : free(d);
58 2 : assert_se(get_process_cmdline(pid, 1, 0, &d) >= 0);
59 2 : log_info("PID"PID_FMT" cmdline truncated to 1: '%s'", pid, d);
60 :
61 2 : assert_se(get_process_ppid(pid, &e) >= 0);
62 2 : log_info("PID"PID_FMT" PPID: "PID_FMT, pid, e);
63 2 : assert_se(pid == 1 ? e == 0 : e > 0);
64 :
65 2 : assert_se(is_kernel_thread(pid) == 0 || pid != 1);
66 :
67 2 : r = get_process_exe(pid, &f);
68 2 : assert_se(r >= 0 || r == -EACCES);
69 2 : log_info("PID"PID_FMT" exe: '%s'", pid, strna(f));
70 :
71 2 : assert_se(get_process_uid(pid, &u) == 0);
72 2 : log_info("PID"PID_FMT" UID: "UID_FMT, pid, u);
73 :
74 2 : assert_se(get_process_gid(pid, &g) == 0);
75 2 : log_info("PID"PID_FMT" GID: "GID_FMT, pid, g);
76 :
77 2 : r = get_process_environ(pid, &env);
78 2 : assert_se(r >= 0 || r == -EACCES);
79 2 : log_info("PID"PID_FMT" strlen(environ): %zi", pid, env ? (ssize_t)strlen(env) : (ssize_t)-errno);
80 :
81 2 : if (!detect_container())
82 2 : assert_se(get_ctty_devnr(pid, &h) == -ENXIO || pid != 1);
83 :
84 2 : (void) getenv_for_pid(pid, "PATH", &i);
85 2 : log_info("PID"PID_FMT" $PATH: '%s'", pid, strna(i));
86 2 : }
87 :
88 10 : static void test_get_process_comm_escape_one(const char *input, const char *output) {
89 10 : _cleanup_free_ char *n = NULL;
90 :
91 10 : log_info("input: <%s> — output: <%s>", input, output);
92 :
93 10 : assert_se(prctl(PR_SET_NAME, input) >= 0);
94 10 : assert_se(get_process_comm(0, &n) >= 0);
95 :
96 10 : log_info("got: <%s>", n);
97 :
98 10 : assert_se(streq_ptr(n, output));
99 10 : }
100 :
101 1 : static void test_get_process_comm_escape(void) {
102 1 : _cleanup_free_ char *saved = NULL;
103 :
104 1 : assert_se(get_process_comm(0, &saved) >= 0);
105 :
106 1 : test_get_process_comm_escape_one("", "");
107 1 : test_get_process_comm_escape_one("foo", "foo");
108 1 : test_get_process_comm_escape_one("012345678901234", "012345678901234");
109 1 : test_get_process_comm_escape_one("0123456789012345", "012345678901234");
110 1 : test_get_process_comm_escape_one("äöüß", "\\303\\244\\303\\266\\303\\274\\303\\237");
111 1 : test_get_process_comm_escape_one("xäöüß", "x\\303\\244\\303\\266\\303\\274\\303\\237");
112 1 : test_get_process_comm_escape_one("xxäöüß", "xx\\303\\244\\303\\266\\303\\274\\303\\237");
113 1 : test_get_process_comm_escape_one("xxxäöüß", "xxx\\303\\244\\303\\266\\303\\274\\303\\237");
114 1 : test_get_process_comm_escape_one("xxxxäöüß", "xxxx\\303\\244\\303\\266\\303\\274\\303\\237");
115 1 : test_get_process_comm_escape_one("xxxxxäöüß", "xxxxx\\303\\244\\303\\266\\303\\274\\303\\237");
116 :
117 1 : assert_se(prctl(PR_SET_NAME, saved) >= 0);
118 1 : }
119 :
120 1 : static void test_pid_is_unwaited(void) {
121 : pid_t pid;
122 :
123 1 : pid = fork();
124 1 : assert_se(pid >= 0);
125 1 : if (pid == 0) {
126 0 : _exit(EXIT_SUCCESS);
127 : } else {
128 : int status;
129 :
130 1 : waitpid(pid, &status, 0);
131 1 : assert_se(!pid_is_unwaited(pid));
132 : }
133 1 : assert_se(pid_is_unwaited(getpid_cached()));
134 1 : assert_se(!pid_is_unwaited(-1));
135 1 : }
136 :
137 1 : static void test_pid_is_alive(void) {
138 : pid_t pid;
139 :
140 1 : pid = fork();
141 1 : assert_se(pid >= 0);
142 1 : if (pid == 0) {
143 0 : _exit(EXIT_SUCCESS);
144 : } else {
145 : int status;
146 :
147 1 : waitpid(pid, &status, 0);
148 1 : assert_se(!pid_is_alive(pid));
149 : }
150 1 : assert_se(pid_is_alive(getpid_cached()));
151 1 : assert_se(!pid_is_alive(-1));
152 1 : }
153 :
154 1 : static void test_personality(void) {
155 :
156 1 : assert_se(personality_to_string(PER_LINUX));
157 1 : assert_se(!personality_to_string(PERSONALITY_INVALID));
158 :
159 1 : assert_se(streq(personality_to_string(PER_LINUX), architecture_to_string(native_architecture())));
160 :
161 1 : assert_se(personality_from_string(personality_to_string(PER_LINUX)) == PER_LINUX);
162 1 : assert_se(personality_from_string(architecture_to_string(native_architecture())) == PER_LINUX);
163 :
164 : #ifdef __x86_64__
165 1 : assert_se(streq_ptr(personality_to_string(PER_LINUX), "x86-64"));
166 1 : assert_se(streq_ptr(personality_to_string(PER_LINUX32), "x86"));
167 :
168 1 : assert_se(personality_from_string("x86-64") == PER_LINUX);
169 1 : assert_se(personality_from_string("x86") == PER_LINUX32);
170 1 : assert_se(personality_from_string("ia64") == PERSONALITY_INVALID);
171 1 : assert_se(personality_from_string(NULL) == PERSONALITY_INVALID);
172 :
173 1 : assert_se(personality_from_string(personality_to_string(PER_LINUX32)) == PER_LINUX32);
174 : #endif
175 1 : }
176 :
177 1 : static void test_get_process_cmdline_harder(void) {
178 1 : char path[] = "/tmp/test-cmdlineXXXXXX";
179 1 : _cleanup_close_ int fd = -1;
180 1 : _cleanup_free_ char *line = NULL;
181 : pid_t pid;
182 :
183 1 : if (geteuid() != 0) {
184 1 : log_info("Skipping %s: not root", __func__);
185 1 : return;
186 : }
187 :
188 0 : if (!have_namespaces()) {
189 0 : log_notice("Testing without namespaces, skipping %s", __func__);
190 0 : 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 0 : pid = fork();
204 0 : if (pid > 0) {
205 : siginfo_t si;
206 :
207 0 : (void) wait_for_terminate(pid, &si);
208 :
209 0 : assert_se(si.si_code == CLD_EXITED);
210 0 : assert_se(si.si_status == 0);
211 :
212 0 : return;
213 : }
214 :
215 0 : assert_se(pid == 0);
216 0 : assert_se(unshare(CLONE_NEWNS) >= 0);
217 :
218 0 : if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL) < 0) {
219 0 : log_warning_errno(errno, "mount(..., \"/\", MS_SLAVE|MS_REC, ...) failed: %m");
220 0 : assert_se(IN_SET(errno, EPERM, EACCES));
221 0 : return;
222 : }
223 :
224 0 : fd = mkostemp(path, O_CLOEXEC);
225 0 : 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 0 : if (mount(path, "/proc/self/cmdline", "bind", MS_BIND, NULL) < 0) {
230 : /* This happens under selinux… Abort the test in this case. */
231 0 : log_warning_errno(errno, "mount(..., \"/proc/self/cmdline\", \"bind\", ...) failed: %m");
232 0 : assert_se(IN_SET(errno, EPERM, EACCES));
233 0 : return;
234 : }
235 :
236 0 : assert_se(unlink(path) >= 0);
237 :
238 0 : assert_se(prctl(PR_SET_NAME, "testa") >= 0);
239 :
240 0 : assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, 0, &line) == -ENOENT);
241 :
242 0 : assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
243 0 : assert_se(streq(line, "[testa]"));
244 0 : line = mfree(line);
245 :
246 0 : assert_se(get_process_cmdline(getpid_cached(), 0, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
247 0 : log_info("'%s'", line);
248 0 : assert_se(streq(line, ""));
249 0 : line = mfree(line);
250 :
251 0 : assert_se(get_process_cmdline(getpid_cached(), 1, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
252 0 : assert_se(streq(line, "…"));
253 0 : line = mfree(line);
254 :
255 0 : assert_se(get_process_cmdline(getpid_cached(), 2, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
256 0 : assert_se(streq(line, "[…"));
257 0 : line = mfree(line);
258 :
259 0 : assert_se(get_process_cmdline(getpid_cached(), 3, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
260 0 : assert_se(streq(line, "[t…"));
261 0 : line = mfree(line);
262 :
263 0 : assert_se(get_process_cmdline(getpid_cached(), 4, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
264 0 : assert_se(streq(line, "[te…"));
265 0 : line = mfree(line);
266 :
267 0 : assert_se(get_process_cmdline(getpid_cached(), 5, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
268 0 : assert_se(streq(line, "[tes…"));
269 0 : line = mfree(line);
270 :
271 0 : assert_se(get_process_cmdline(getpid_cached(), 6, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
272 0 : assert_se(streq(line, "[test…"));
273 0 : line = mfree(line);
274 :
275 0 : assert_se(get_process_cmdline(getpid_cached(), 7, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
276 0 : assert_se(streq(line, "[testa]"));
277 0 : line = mfree(line);
278 :
279 0 : assert_se(get_process_cmdline(getpid_cached(), 8, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
280 0 : assert_se(streq(line, "[testa]"));
281 0 : line = mfree(line);
282 :
283 0 : assert_se(write(fd, "foo\0bar", 8) == 8);
284 :
285 0 : assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, 0, &line) >= 0);
286 0 : log_info("'%s'", line);
287 0 : assert_se(streq(line, "foo bar"));
288 0 : line = mfree(line);
289 :
290 0 : assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
291 0 : assert_se(streq(line, "foo bar"));
292 0 : line = mfree(line);
293 :
294 0 : assert_se(write(fd, "quux", 4) == 4);
295 0 : assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, 0, &line) >= 0);
296 0 : log_info("'%s'", line);
297 0 : assert_se(streq(line, "foo bar quux"));
298 0 : line = mfree(line);
299 :
300 0 : assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
301 0 : assert_se(streq(line, "foo bar quux"));
302 0 : line = mfree(line);
303 :
304 0 : assert_se(get_process_cmdline(getpid_cached(), 1, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
305 0 : assert_se(streq(line, "…"));
306 0 : line = mfree(line);
307 :
308 0 : assert_se(get_process_cmdline(getpid_cached(), 2, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
309 0 : assert_se(streq(line, "f…"));
310 0 : line = mfree(line);
311 :
312 0 : assert_se(get_process_cmdline(getpid_cached(), 3, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
313 0 : assert_se(streq(line, "fo…"));
314 0 : line = mfree(line);
315 :
316 0 : assert_se(get_process_cmdline(getpid_cached(), 4, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
317 0 : assert_se(streq(line, "foo…"));
318 0 : line = mfree(line);
319 :
320 0 : assert_se(get_process_cmdline(getpid_cached(), 5, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
321 0 : assert_se(streq(line, "foo …"));
322 0 : line = mfree(line);
323 :
324 0 : assert_se(get_process_cmdline(getpid_cached(), 6, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
325 0 : assert_se(streq(line, "foo b…"));
326 0 : line = mfree(line);
327 :
328 0 : assert_se(get_process_cmdline(getpid_cached(), 7, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
329 0 : assert_se(streq(line, "foo ba…"));
330 0 : line = mfree(line);
331 :
332 0 : assert_se(get_process_cmdline(getpid_cached(), 8, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
333 0 : assert_se(streq(line, "foo bar…"));
334 0 : line = mfree(line);
335 :
336 0 : assert_se(get_process_cmdline(getpid_cached(), 9, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
337 0 : assert_se(streq(line, "foo bar …"));
338 0 : line = mfree(line);
339 :
340 0 : assert_se(get_process_cmdline(getpid_cached(), 10, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
341 0 : assert_se(streq(line, "foo bar q…"));
342 0 : line = mfree(line);
343 :
344 0 : assert_se(get_process_cmdline(getpid_cached(), 11, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
345 0 : assert_se(streq(line, "foo bar qu…"));
346 0 : line = mfree(line);
347 :
348 0 : assert_se(get_process_cmdline(getpid_cached(), 12, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
349 0 : assert_se(streq(line, "foo bar quux"));
350 0 : line = mfree(line);
351 :
352 0 : assert_se(get_process_cmdline(getpid_cached(), 13, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
353 0 : assert_se(streq(line, "foo bar quux"));
354 0 : line = mfree(line);
355 :
356 0 : assert_se(get_process_cmdline(getpid_cached(), 14, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
357 0 : assert_se(streq(line, "foo bar quux"));
358 0 : line = mfree(line);
359 :
360 0 : assert_se(get_process_cmdline(getpid_cached(), 1000, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
361 0 : assert_se(streq(line, "foo bar quux"));
362 0 : line = mfree(line);
363 :
364 0 : assert_se(ftruncate(fd, 0) >= 0);
365 0 : assert_se(prctl(PR_SET_NAME, "aaaa bbbb cccc") >= 0);
366 :
367 0 : assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, 0, &line) == -ENOENT);
368 :
369 0 : assert_se(get_process_cmdline(getpid_cached(), SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
370 0 : assert_se(streq(line, "[aaaa bbbb cccc]"));
371 0 : line = mfree(line);
372 :
373 0 : assert_se(get_process_cmdline(getpid_cached(), 10, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
374 0 : assert_se(streq(line, "[aaaa bbb…"));
375 0 : line = mfree(line);
376 :
377 0 : assert_se(get_process_cmdline(getpid_cached(), 11, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
378 0 : assert_se(streq(line, "[aaaa bbbb…"));
379 0 : line = mfree(line);
380 :
381 0 : assert_se(get_process_cmdline(getpid_cached(), 12, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0);
382 0 : assert_se(streq(line, "[aaaa bbbb …"));
383 0 : line = mfree(line);
384 :
385 0 : safe_close(fd);
386 0 : _exit(EXIT_SUCCESS);
387 : }
388 :
389 4 : static void test_rename_process_now(const char *p, int ret) {
390 4 : _cleanup_free_ char *comm = NULL, *cmdline = NULL;
391 : int r;
392 :
393 4 : r = rename_process(p);
394 4 : assert_se(r == ret ||
395 : (ret == 0 && r >= 0) ||
396 : (ret > 0 && r > 0));
397 :
398 4 : if (r < 0)
399 0 : 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 4 : assert_se(get_process_comm(0, &comm) >= 0);
408 4 : log_info("comm = <%s>", comm);
409 4 : 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 4 : r = get_process_cmdline(0, SIZE_MAX, 0, &cmdline);
414 4 : assert_se(r >= 0);
415 : /* we cannot expect cmdline to be renamed properly without privileges */
416 4 : if (geteuid() == 0) {
417 0 : if (r == 0 && detect_container() > 0)
418 0 : log_info("cmdline = <%s> (not verified, Running in unprivileged container?)", cmdline);
419 : else {
420 0 : log_info("cmdline = <%s>", cmdline);
421 0 : assert_se(strneq(p, cmdline, STRLEN("test-process-util")));
422 0 : assert_se(startswith(p, cmdline));
423 : }
424 : } else
425 4 : log_info("cmdline = <%s> (not verified)", cmdline);
426 : }
427 :
428 7 : static void test_rename_process_one(const char *p, int ret) {
429 : siginfo_t si;
430 : pid_t pid;
431 :
432 7 : pid = fork();
433 6 : assert_se(pid >= 0);
434 :
435 6 : if (pid == 0) {
436 : /* child */
437 0 : test_rename_process_now(p, ret);
438 0 : _exit(EXIT_SUCCESS);
439 : }
440 :
441 6 : assert_se(wait_for_terminate(pid, &si) >= 0);
442 6 : assert_se(si.si_code == CLD_EXITED);
443 6 : assert_se(si.si_status == EXIT_SUCCESS);
444 6 : }
445 :
446 1 : static void test_rename_process_multi(void) {
447 : pid_t pid;
448 :
449 1 : pid = fork();
450 2 : assert_se(pid >= 0);
451 :
452 2 : if (pid > 0) {
453 : siginfo_t si;
454 :
455 1 : assert_se(wait_for_terminate(pid, &si) >= 0);
456 1 : assert_se(si.si_code == CLD_EXITED);
457 1 : assert_se(si.si_status == EXIT_SUCCESS);
458 :
459 1 : return;
460 : }
461 :
462 : /* child */
463 1 : test_rename_process_now("one", 1);
464 1 : test_rename_process_now("more", 0); /* longer than "one", hence truncated */
465 1 : (void) setresuid(99, 99, 99); /* change uid when running privileged */
466 1 : test_rename_process_now("time!", 0);
467 1 : test_rename_process_now("0", 1); /* shorter than "one", should fit */
468 1 : test_rename_process_one("", -EINVAL);
469 1 : test_rename_process_one(NULL, -EINVAL);
470 0 : _exit(EXIT_SUCCESS);
471 : }
472 :
473 1 : static void test_rename_process(void) {
474 1 : test_rename_process_one(NULL, -EINVAL);
475 1 : test_rename_process_one("", -EINVAL);
476 1 : test_rename_process_one("foo", 1); /* should always fit */
477 1 : test_rename_process_one("this is a really really long process name, followed by some more words", 0); /* unlikely to fit */
478 1 : test_rename_process_one("1234567", 1); /* should always fit */
479 1 : test_rename_process_multi(); /* multiple invocations and dropped privileges */
480 1 : }
481 :
482 1 : static void test_getpid_cached(void) {
483 : siginfo_t si;
484 : pid_t a, b, c, d, e, f, child;
485 :
486 1 : a = raw_getpid();
487 1 : b = getpid_cached();
488 1 : c = getpid();
489 :
490 1 : assert_se(a == b && a == c);
491 :
492 1 : child = fork();
493 1 : assert_se(child >= 0);
494 :
495 1 : if (child == 0) {
496 : /* In child */
497 0 : a = raw_getpid();
498 0 : b = getpid_cached();
499 0 : c = getpid();
500 :
501 0 : assert_se(a == b && a == c);
502 0 : _exit(EXIT_SUCCESS);
503 : }
504 :
505 1 : d = raw_getpid();
506 1 : e = getpid_cached();
507 1 : f = getpid();
508 :
509 1 : assert_se(a == d && a == e && a == f);
510 :
511 1 : assert_se(wait_for_terminate(child, &si) >= 0);
512 1 : assert_se(si.si_status == 0);
513 1 : assert_se(si.si_code == CLD_EXITED);
514 1 : }
515 :
516 : #define MEASURE_ITERATIONS (10000000LLU)
517 :
518 1 : static void test_getpid_measure(void) {
519 : unsigned long long i;
520 : usec_t t, q;
521 :
522 1 : t = now(CLOCK_MONOTONIC);
523 10000001 : for (i = 0; i < MEASURE_ITERATIONS; i++)
524 10000000 : (void) getpid();
525 1 : q = now(CLOCK_MONOTONIC) - t;
526 :
527 1 : log_info(" glibc getpid(): %lf µs each\n", (double) q / MEASURE_ITERATIONS);
528 :
529 1 : t = now(CLOCK_MONOTONIC);
530 10000001 : for (i = 0; i < MEASURE_ITERATIONS; i++)
531 10000000 : (void) getpid_cached();
532 1 : q = now(CLOCK_MONOTONIC) - t;
533 :
534 1 : log_info("getpid_cached(): %lf µs each\n", (double) q / MEASURE_ITERATIONS);
535 1 : }
536 :
537 1 : static void test_safe_fork(void) {
538 : siginfo_t status;
539 : pid_t pid;
540 : int r;
541 :
542 2 : BLOCK_SIGNALS(SIGCHLD);
543 :
544 1 : r = safe_fork("(test-child)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG|FORK_NULL_STDIO|FORK_REOPEN_LOG, &pid);
545 1 : assert_se(r >= 0);
546 :
547 1 : if (r == 0) {
548 : /* child */
549 0 : usleep(100 * USEC_PER_MSEC);
550 :
551 0 : _exit(88);
552 : }
553 :
554 1 : assert_se(wait_for_terminate(pid, &status) >= 0);
555 1 : assert_se(status.si_code == CLD_EXITED);
556 1 : assert_se(status.si_status == 88);
557 1 : }
558 :
559 1 : static void test_pid_to_ptr(void) {
560 :
561 1 : assert_se(PTR_TO_PID(NULL) == 0);
562 1 : assert_se(PID_TO_PTR(0) == NULL);
563 :
564 1 : assert_se(PTR_TO_PID(PID_TO_PTR(1)) == 1);
565 1 : assert_se(PTR_TO_PID(PID_TO_PTR(2)) == 2);
566 1 : assert_se(PTR_TO_PID(PID_TO_PTR(-1)) == -1);
567 1 : assert_se(PTR_TO_PID(PID_TO_PTR(-2)) == -2);
568 :
569 1 : assert_se(PTR_TO_PID(PID_TO_PTR(INT16_MAX)) == INT16_MAX);
570 1 : assert_se(PTR_TO_PID(PID_TO_PTR(INT16_MIN)) == INT16_MIN);
571 :
572 : #if SIZEOF_PID_T >= 4
573 1 : assert_se(PTR_TO_PID(PID_TO_PTR(INT32_MAX)) == INT32_MAX);
574 1 : assert_se(PTR_TO_PID(PID_TO_PTR(INT32_MIN)) == INT32_MIN);
575 : #endif
576 1 : }
577 :
578 10 : static void test_ioprio_class_from_to_string_one(const char *val, int expected) {
579 10 : assert_se(ioprio_class_from_string(val) == expected);
580 10 : if (expected >= 0) {
581 8 : _cleanup_free_ char *s = NULL;
582 : unsigned ret;
583 :
584 8 : assert_se(ioprio_class_to_string_alloc(expected, &s) == 0);
585 : /* We sometimes get a class number and sometimes a number back */
586 8 : assert_se(streq(s, val) ||
587 : safe_atou(val, &ret) == 0);
588 : }
589 10 : }
590 :
591 1 : static void test_ioprio_class_from_to_string(void) {
592 1 : test_ioprio_class_from_to_string_one("none", IOPRIO_CLASS_NONE);
593 1 : test_ioprio_class_from_to_string_one("realtime", IOPRIO_CLASS_RT);
594 1 : test_ioprio_class_from_to_string_one("best-effort", IOPRIO_CLASS_BE);
595 1 : test_ioprio_class_from_to_string_one("idle", IOPRIO_CLASS_IDLE);
596 1 : test_ioprio_class_from_to_string_one("0", 0);
597 1 : test_ioprio_class_from_to_string_one("1", 1);
598 1 : test_ioprio_class_from_to_string_one("7", 7);
599 1 : test_ioprio_class_from_to_string_one("8", 8);
600 1 : test_ioprio_class_from_to_string_one("9", -1);
601 1 : test_ioprio_class_from_to_string_one("-1", -1);
602 1 : }
603 :
604 1 : int main(int argc, char *argv[]) {
605 1 : test_setup_logging(LOG_DEBUG);
606 :
607 1 : save_argc_argv(argc, argv);
608 :
609 1 : if (argc > 1) {
610 0 : pid_t pid = 0;
611 :
612 0 : (void) parse_pid(argv[1], &pid);
613 0 : test_get_process_comm(pid);
614 : } else {
615 1 : TEST_REQ_RUNNING_SYSTEMD(test_get_process_comm(1));
616 1 : test_get_process_comm(getpid());
617 : }
618 :
619 1 : test_get_process_comm_escape();
620 1 : test_pid_is_unwaited();
621 1 : test_pid_is_alive();
622 1 : test_personality();
623 1 : test_get_process_cmdline_harder();
624 1 : test_rename_process();
625 1 : test_getpid_cached();
626 1 : test_getpid_measure();
627 1 : test_safe_fork();
628 1 : test_pid_to_ptr();
629 1 : test_ioprio_class_from_to_string();
630 :
631 1 : return 0;
632 : }
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