1 /* SPDX-License-Identifier: GPL-2.0 */
2 
3 #define _GNU_SOURCE
4 #define _LARGEFILE64_SOURCE
5 
6 /* libc-specific include files
7  * The program may be built in 3 ways:
8  *   $(CC) -nostdlib -include /path/to/nolibc.h => NOLIBC already defined
9  *   $(CC) -nostdlib -I/path/to/nolibc/sysroot  => _NOLIBC_* guards are present
10  *   $(CC) with default libc                    => NOLIBC* never defined
11  */
12 #ifndef NOLIBC
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <string.h>
16 #ifndef _NOLIBC_STDIO_H
17 /* standard libcs need more includes */
18 #include <sys/auxv.h>
19 #include <sys/io.h>
20 #include <sys/ioctl.h>
21 #include <sys/mman.h>
22 #include <sys/mount.h>
23 #include <sys/prctl.h>
24 #include <sys/reboot.h>
25 #include <sys/stat.h>
26 #include <sys/syscall.h>
27 #include <sys/sysmacros.h>
28 #include <sys/time.h>
29 #include <sys/wait.h>
30 #include <dirent.h>
31 #include <errno.h>
32 #include <fcntl.h>
33 #include <poll.h>
34 #include <sched.h>
35 #include <signal.h>
36 #include <stdarg.h>
37 #include <stddef.h>
38 #include <stdint.h>
39 #include <unistd.h>
40 #include <limits.h>
41 #endif
42 #endif
43 
44 /* for the type of int_fast16_t and int_fast32_t, musl differs from glibc and nolibc */
45 #define SINT_MAX_OF_TYPE(type) (((type)1 << (sizeof(type) * 8 - 2)) - (type)1 + ((type)1 << (sizeof(type) * 8 - 2)))
46 #define SINT_MIN_OF_TYPE(type) (-SINT_MAX_OF_TYPE(type) - 1)
47 
48 /* will be used to test initialization of environ */
49 static char **test_envp;
50 
51 /* will be used to test initialization of argv */
52 static char **test_argv;
53 
54 /* will be used to test initialization of argc */
55 static int test_argc;
56 
57 /* will be used by some test cases as readable file, please don't write it */
58 static const char *argv0;
59 
60 /* definition of a series of tests */
61 struct test {
62 	const char *name;              /* test name */
63 	int (*func)(int min, int max); /* handler */
64 };
65 
66 #ifndef _NOLIBC_STDLIB_H
67 char *itoa(int i)
68 {
69 	static char buf[12];
70 	int ret;
71 
72 	ret = snprintf(buf, sizeof(buf), "%d", i);
73 	return (ret >= 0 && ret < sizeof(buf)) ? buf : "#err";
74 }
75 #endif
76 
77 #define CASE_ERR(err) \
78 	case err: return #err
79 
80 /* returns the error name (e.g. "ENOENT") for common errors, "SUCCESS" for 0,
81  * or the decimal value for less common ones.
82  */
83 static const char *errorname(int err)
84 {
85 	switch (err) {
86 	case 0: return "SUCCESS";
87 	CASE_ERR(EPERM);
88 	CASE_ERR(ENOENT);
89 	CASE_ERR(ESRCH);
90 	CASE_ERR(EINTR);
91 	CASE_ERR(EIO);
92 	CASE_ERR(ENXIO);
93 	CASE_ERR(E2BIG);
94 	CASE_ERR(ENOEXEC);
95 	CASE_ERR(EBADF);
96 	CASE_ERR(ECHILD);
97 	CASE_ERR(EAGAIN);
98 	CASE_ERR(ENOMEM);
99 	CASE_ERR(EACCES);
100 	CASE_ERR(EFAULT);
101 	CASE_ERR(ENOTBLK);
102 	CASE_ERR(EBUSY);
103 	CASE_ERR(EEXIST);
104 	CASE_ERR(EXDEV);
105 	CASE_ERR(ENODEV);
106 	CASE_ERR(ENOTDIR);
107 	CASE_ERR(EISDIR);
108 	CASE_ERR(EINVAL);
109 	CASE_ERR(ENFILE);
110 	CASE_ERR(EMFILE);
111 	CASE_ERR(ENOTTY);
112 	CASE_ERR(ETXTBSY);
113 	CASE_ERR(EFBIG);
114 	CASE_ERR(ENOSPC);
115 	CASE_ERR(ESPIPE);
116 	CASE_ERR(EROFS);
117 	CASE_ERR(EMLINK);
118 	CASE_ERR(EPIPE);
119 	CASE_ERR(EDOM);
120 	CASE_ERR(ERANGE);
121 	CASE_ERR(ENOSYS);
122 	CASE_ERR(EOVERFLOW);
123 	default:
124 		return itoa(err);
125 	}
126 }
127 
128 static void putcharn(char c, size_t n)
129 {
130 	char buf[64];
131 
132 	memset(buf, c, n);
133 	buf[n] = '\0';
134 	fputs(buf, stdout);
135 }
136 
137 enum RESULT {
138 	OK,
139 	FAIL,
140 	SKIPPED,
141 };
142 
143 static void result(int llen, enum RESULT r)
144 {
145 	const char *msg;
146 
147 	if (r == OK)
148 		msg = "  [OK]";
149 	else if (r == SKIPPED)
150 		msg = "[SKIPPED]";
151 	else
152 		msg = " [FAIL]";
153 
154 	if (llen < 64)
155 		putcharn(' ', 64 - llen);
156 	puts(msg);
157 }
158 
159 /* The tests below are intended to be used by the macroes, which evaluate
160  * expression <expr>, print the status to stdout, and update the "ret"
161  * variable to count failures. The functions themselves return the number
162  * of failures, thus either 0 or 1.
163  */
164 
165 #define EXPECT_ZR(cond, expr)				\
166 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_zr(expr, llen); } while (0)
167 
168 static __attribute__((unused))
169 int expect_zr(int expr, int llen)
170 {
171 	int ret = !(expr == 0);
172 
173 	llen += printf(" = %d ", expr);
174 	result(llen, ret ? FAIL : OK);
175 	return ret;
176 }
177 
178 
179 #define EXPECT_NZ(cond, expr, val)			\
180 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_nz(expr, llen; } while (0)
181 
182 static __attribute__((unused))
183 int expect_nz(int expr, int llen)
184 {
185 	int ret = !(expr != 0);
186 
187 	llen += printf(" = %d ", expr);
188 	result(llen, ret ? FAIL : OK);
189 	return ret;
190 }
191 
192 
193 #define EXPECT_EQ(cond, expr, val)				\
194 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_eq(expr, llen, val); } while (0)
195 
196 static __attribute__((unused))
197 int expect_eq(uint64_t expr, int llen, uint64_t val)
198 {
199 	int ret = !(expr == val);
200 
201 	llen += printf(" = %lld ", (long long)expr);
202 	result(llen, ret ? FAIL : OK);
203 	return ret;
204 }
205 
206 
207 #define EXPECT_NE(cond, expr, val)				\
208 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ne(expr, llen, val); } while (0)
209 
210 static __attribute__((unused))
211 int expect_ne(int expr, int llen, int val)
212 {
213 	int ret = !(expr != val);
214 
215 	llen += printf(" = %d ", expr);
216 	result(llen, ret ? FAIL : OK);
217 	return ret;
218 }
219 
220 
221 #define EXPECT_GE(cond, expr, val)				\
222 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ge(expr, llen, val); } while (0)
223 
224 static __attribute__((unused))
225 int expect_ge(int expr, int llen, int val)
226 {
227 	int ret = !(expr >= val);
228 
229 	llen += printf(" = %d ", expr);
230 	result(llen, ret ? FAIL : OK);
231 	return ret;
232 }
233 
234 
235 #define EXPECT_GT(cond, expr, val)				\
236 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_gt(expr, llen, val); } while (0)
237 
238 static __attribute__((unused))
239 int expect_gt(int expr, int llen, int val)
240 {
241 	int ret = !(expr > val);
242 
243 	llen += printf(" = %d ", expr);
244 	result(llen, ret ? FAIL : OK);
245 	return ret;
246 }
247 
248 
249 #define EXPECT_LE(cond, expr, val)				\
250 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_le(expr, llen, val); } while (0)
251 
252 static __attribute__((unused))
253 int expect_le(int expr, int llen, int val)
254 {
255 	int ret = !(expr <= val);
256 
257 	llen += printf(" = %d ", expr);
258 	result(llen, ret ? FAIL : OK);
259 	return ret;
260 }
261 
262 
263 #define EXPECT_LT(cond, expr, val)				\
264 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_lt(expr, llen, val); } while (0)
265 
266 static __attribute__((unused))
267 int expect_lt(int expr, int llen, int val)
268 {
269 	int ret = !(expr < val);
270 
271 	llen += printf(" = %d ", expr);
272 	result(llen, ret ? FAIL : OK);
273 	return ret;
274 }
275 
276 
277 #define EXPECT_SYSZR(cond, expr)				\
278 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_syszr(expr, llen); } while (0)
279 
280 static __attribute__((unused))
281 int expect_syszr(int expr, int llen)
282 {
283 	int ret = 0;
284 
285 	if (expr) {
286 		ret = 1;
287 		llen += printf(" = %d %s ", expr, errorname(errno));
288 		result(llen, FAIL);
289 	} else {
290 		llen += printf(" = %d ", expr);
291 		result(llen, OK);
292 	}
293 	return ret;
294 }
295 
296 
297 #define EXPECT_SYSEQ(cond, expr, val)				\
298 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_syseq(expr, llen, val); } while (0)
299 
300 static __attribute__((unused))
301 int expect_syseq(int expr, int llen, int val)
302 {
303 	int ret = 0;
304 
305 	if (expr != val) {
306 		ret = 1;
307 		llen += printf(" = %d %s ", expr, errorname(errno));
308 		result(llen, FAIL);
309 	} else {
310 		llen += printf(" = %d ", expr);
311 		result(llen, OK);
312 	}
313 	return ret;
314 }
315 
316 
317 #define EXPECT_SYSNE(cond, expr, val)				\
318 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_sysne(expr, llen, val); } while (0)
319 
320 static __attribute__((unused))
321 int expect_sysne(int expr, int llen, int val)
322 {
323 	int ret = 0;
324 
325 	if (expr == val) {
326 		ret = 1;
327 		llen += printf(" = %d %s ", expr, errorname(errno));
328 		result(llen, FAIL);
329 	} else {
330 		llen += printf(" = %d ", expr);
331 		result(llen, OK);
332 	}
333 	return ret;
334 }
335 
336 
337 #define EXPECT_SYSER2(cond, expr, expret, experr1, experr2)		\
338 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_syserr2(expr, expret, experr1, experr2, llen); } while (0)
339 
340 #define EXPECT_SYSER(cond, expr, expret, experr)			\
341 	EXPECT_SYSER2(cond, expr, expret, experr, 0)
342 
343 static __attribute__((unused))
344 int expect_syserr2(int expr, int expret, int experr1, int experr2, int llen)
345 {
346 	int ret = 0;
347 	int _errno = errno;
348 
349 	llen += printf(" = %d %s ", expr, errorname(_errno));
350 	if (expr != expret || (_errno != experr1 && _errno != experr2)) {
351 		ret = 1;
352 		if (experr2 == 0)
353 			llen += printf(" != (%d %s) ", expret, errorname(experr1));
354 		else
355 			llen += printf(" != (%d %s %s) ", expret, errorname(experr1), errorname(experr2));
356 		result(llen, FAIL);
357 	} else {
358 		result(llen, OK);
359 	}
360 	return ret;
361 }
362 
363 
364 #define EXPECT_PTRZR(cond, expr)				\
365 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrzr(expr, llen); } while (0)
366 
367 static __attribute__((unused))
368 int expect_ptrzr(const void *expr, int llen)
369 {
370 	int ret = 0;
371 
372 	llen += printf(" = <%p> ", expr);
373 	if (expr) {
374 		ret = 1;
375 		result(llen, FAIL);
376 	} else {
377 		result(llen, OK);
378 	}
379 	return ret;
380 }
381 
382 
383 #define EXPECT_PTRNZ(cond, expr)				\
384 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrnz(expr, llen); } while (0)
385 
386 static __attribute__((unused))
387 int expect_ptrnz(const void *expr, int llen)
388 {
389 	int ret = 0;
390 
391 	llen += printf(" = <%p> ", expr);
392 	if (!expr) {
393 		ret = 1;
394 		result(llen, FAIL);
395 	} else {
396 		result(llen, OK);
397 	}
398 	return ret;
399 }
400 
401 #define EXPECT_PTREQ(cond, expr, cmp)				\
402 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptreq(expr, llen, cmp); } while (0)
403 
404 static __attribute__((unused))
405 int expect_ptreq(const void *expr, int llen, const void *cmp)
406 {
407 	int ret = 0;
408 
409 	llen += printf(" = <%p> ", expr);
410 	if (expr != cmp) {
411 		ret = 1;
412 		result(llen, FAIL);
413 	} else {
414 		result(llen, OK);
415 	}
416 	return ret;
417 }
418 
419 #define EXPECT_PTRNE(cond, expr, cmp)				\
420 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrne(expr, llen, cmp); } while (0)
421 
422 static __attribute__((unused))
423 int expect_ptrne(const void *expr, int llen, const void *cmp)
424 {
425 	int ret = 0;
426 
427 	llen += printf(" = <%p> ", expr);
428 	if (expr == cmp) {
429 		ret = 1;
430 		result(llen, FAIL);
431 	} else {
432 		result(llen, OK);
433 	}
434 	return ret;
435 }
436 
437 #define EXPECT_PTRGE(cond, expr, cmp)				\
438 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrge(expr, llen, cmp); } while (0)
439 
440 static __attribute__((unused))
441 int expect_ptrge(const void *expr, int llen, const void *cmp)
442 {
443 	int ret = !(expr >= cmp);
444 
445 	llen += printf(" = <%p> ", expr);
446 	result(llen, ret ? FAIL : OK);
447 	return ret;
448 }
449 
450 #define EXPECT_PTRGT(cond, expr, cmp)				\
451 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrgt(expr, llen, cmp); } while (0)
452 
453 static __attribute__((unused))
454 int expect_ptrgt(const void *expr, int llen, const void *cmp)
455 {
456 	int ret = !(expr > cmp);
457 
458 	llen += printf(" = <%p> ", expr);
459 	result(llen, ret ? FAIL : OK);
460 	return ret;
461 }
462 
463 
464 #define EXPECT_PTRLE(cond, expr, cmp)				\
465 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrle(expr, llen, cmp); } while (0)
466 
467 static __attribute__((unused))
468 int expect_ptrle(const void *expr, int llen, const void *cmp)
469 {
470 	int ret = !(expr <= cmp);
471 
472 	llen += printf(" = <%p> ", expr);
473 	result(llen, ret ? FAIL : OK);
474 	return ret;
475 }
476 
477 
478 #define EXPECT_PTRLT(cond, expr, cmp)				\
479 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrlt(expr, llen, cmp); } while (0)
480 
481 static __attribute__((unused))
482 int expect_ptrlt(const void *expr, int llen, const void *cmp)
483 {
484 	int ret = !(expr < cmp);
485 
486 	llen += printf(" = <%p> ", expr);
487 	result(llen, ret ? FAIL : OK);
488 	return ret;
489 }
490 
491 #define EXPECT_PTRER2(cond, expr, expret, experr1, experr2)		\
492 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrerr2(expr, expret, experr1, experr2, llen); } while (0)
493 
494 #define EXPECT_PTRER(cond, expr, expret, experr)			\
495 	EXPECT_PTRER2(cond, expr, expret, experr, 0)
496 
497 static __attribute__((unused))
498 int expect_ptrerr2(const void *expr, const void *expret, int experr1, int experr2, int llen)
499 {
500 	int ret = 0;
501 	int _errno = errno;
502 
503 	llen += printf(" = <%p> %s ", expr, errorname(_errno));
504 	if (expr != expret || (_errno != experr1 && _errno != experr2)) {
505 		ret = 1;
506 		if (experr2 == 0)
507 			llen += printf(" != (<%p> %s) ", expret, errorname(experr1));
508 		else
509 			llen += printf(" != (<%p> %s %s) ", expret, errorname(experr1), errorname(experr2));
510 		result(llen, FAIL);
511 	} else {
512 		result(llen, OK);
513 	}
514 	return ret;
515 }
516 
517 #define EXPECT_STRZR(cond, expr)				\
518 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_strzr(expr, llen); } while (0)
519 
520 static __attribute__((unused))
521 int expect_strzr(const char *expr, int llen)
522 {
523 	int ret = 0;
524 
525 	llen += printf(" = <%s> ", expr);
526 	if (expr) {
527 		ret = 1;
528 		result(llen, FAIL);
529 	} else {
530 		result(llen, OK);
531 	}
532 	return ret;
533 }
534 
535 
536 #define EXPECT_STRNZ(cond, expr)				\
537 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_strnz(expr, llen); } while (0)
538 
539 static __attribute__((unused))
540 int expect_strnz(const char *expr, int llen)
541 {
542 	int ret = 0;
543 
544 	llen += printf(" = <%s> ", expr);
545 	if (!expr) {
546 		ret = 1;
547 		result(llen, FAIL);
548 	} else {
549 		result(llen, OK);
550 	}
551 	return ret;
552 }
553 
554 
555 #define EXPECT_STREQ(cond, expr, cmp)				\
556 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_streq(expr, llen, cmp); } while (0)
557 
558 static __attribute__((unused))
559 int expect_streq(const char *expr, int llen, const char *cmp)
560 {
561 	int ret = 0;
562 
563 	llen += printf(" = <%s> ", expr);
564 	if (strcmp(expr, cmp) != 0) {
565 		ret = 1;
566 		result(llen, FAIL);
567 	} else {
568 		result(llen, OK);
569 	}
570 	return ret;
571 }
572 
573 
574 #define EXPECT_STRNE(cond, expr, cmp)				\
575 	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_strne(expr, llen, cmp); } while (0)
576 
577 static __attribute__((unused))
578 int expect_strne(const char *expr, int llen, const char *cmp)
579 {
580 	int ret = 0;
581 
582 	llen += printf(" = <%s> ", expr);
583 	if (strcmp(expr, cmp) == 0) {
584 		ret = 1;
585 		result(llen, FAIL);
586 	} else {
587 		result(llen, OK);
588 	}
589 	return ret;
590 }
591 
592 
593 /* declare tests based on line numbers. There must be exactly one test per line. */
594 #define CASE_TEST(name) \
595 	case __LINE__: llen += printf("%d %s", test, #name);
596 
597 int run_startup(int min, int max)
598 {
599 	int test;
600 	int ret = 0;
601 	/* kernel at least passes HOME and TERM, shell passes more */
602 	int env_total = 2;
603 	/* checking NULL for argv/argv0, environ and _auxv is not enough, let's compare with sbrk(0) or &end */
604 	extern char end;
605 	char *brk = sbrk(0) != (void *)-1 ? sbrk(0) : &end;
606 	/* differ from nolibc, both glibc and musl have no global _auxv */
607 	const unsigned long *test_auxv = (void *)-1;
608 #ifdef NOLIBC
609 	test_auxv = _auxv;
610 #endif
611 
612 	for (test = min; test >= 0 && test <= max; test++) {
613 		int llen = 0; /* line length */
614 
615 		/* avoid leaving empty lines below, this will insert holes into
616 		 * test numbers.
617 		 */
618 		switch (test + __LINE__ + 1) {
619 		CASE_TEST(argc);             EXPECT_GE(1, test_argc, 1); break;
620 		CASE_TEST(argv_addr);        EXPECT_PTRGT(1, test_argv, brk); break;
621 		CASE_TEST(argv_environ);     EXPECT_PTRLT(1, test_argv, environ); break;
622 		CASE_TEST(argv_total);       EXPECT_EQ(1, environ - test_argv - 1, test_argc ?: 1); break;
623 		CASE_TEST(argv0_addr);       EXPECT_PTRGT(1, argv0, brk); break;
624 		CASE_TEST(argv0_str);        EXPECT_STRNZ(1, argv0 > brk ? argv0 : NULL); break;
625 		CASE_TEST(argv0_len);        EXPECT_GE(1,  argv0 > brk ? strlen(argv0) : 0, 1); break;
626 		CASE_TEST(environ_addr);     EXPECT_PTRGT(1, environ, brk); break;
627 		CASE_TEST(environ_envp);     EXPECT_PTREQ(1, environ, test_envp); break;
628 		CASE_TEST(environ_auxv);     EXPECT_PTRLT(test_auxv != (void *)-1, environ, test_auxv); break;
629 		CASE_TEST(environ_total);    EXPECT_GE(test_auxv != (void *)-1, (void *)test_auxv - (void *)environ - 1, env_total); break;
630 		CASE_TEST(environ_HOME);     EXPECT_PTRNZ(1, getenv("HOME")); break;
631 		CASE_TEST(auxv_addr);        EXPECT_PTRGT(test_auxv != (void *)-1, test_auxv, brk); break;
632 		CASE_TEST(auxv_AT_UID);      EXPECT_EQ(1, getauxval(AT_UID), getuid()); break;
633 		CASE_TEST(auxv_AT_PAGESZ);   EXPECT_GE(1, getauxval(AT_PAGESZ), 4096); break;
634 		case __LINE__:
635 			return ret; /* must be last */
636 		/* note: do not set any defaults so as to permit holes above */
637 		}
638 	}
639 	return ret;
640 }
641 
642 
643 /* used by some syscall tests below */
644 int test_getdents64(const char *dir)
645 {
646 	char buffer[4096];
647 	int fd, ret;
648 	int err;
649 
650 	ret = fd = open(dir, O_RDONLY | O_DIRECTORY, 0);
651 	if (ret < 0)
652 		return ret;
653 
654 	ret = getdents64(fd, (void *)buffer, sizeof(buffer));
655 	err = errno;
656 	close(fd);
657 
658 	errno = err;
659 	return ret;
660 }
661 
662 int test_getpagesize(void)
663 {
664 	int x = getpagesize();
665 	int c;
666 
667 	if (x < 0)
668 		return x;
669 
670 #if defined(__x86_64__) || defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__)
671 	/*
672 	 * x86 family is always 4K page.
673 	 */
674 	c = (x == 4096);
675 #elif defined(__aarch64__)
676 	/*
677 	 * Linux aarch64 supports three values of page size: 4K, 16K, and 64K
678 	 * which are selected at kernel compilation time.
679 	 */
680 	c = (x == 4096 || x == (16 * 1024) || x == (64 * 1024));
681 #else
682 	/*
683 	 * Assuming other architectures must have at least 4K page.
684 	 */
685 	c = (x >= 4096);
686 #endif
687 
688 	return !c;
689 }
690 
691 int test_fork(void)
692 {
693 	int status;
694 	pid_t pid;
695 
696 	/* flush the printf buffer to avoid child flush it */
697 	fflush(stdout);
698 	fflush(stderr);
699 
700 	pid = fork();
701 
702 	switch (pid) {
703 	case -1:
704 		return 1;
705 
706 	case 0:
707 		exit(123);
708 
709 	default:
710 		pid = waitpid(pid, &status, 0);
711 
712 		return pid == -1 || !WIFEXITED(status) || WEXITSTATUS(status) != 123;
713 	}
714 }
715 
716 int test_stat_timestamps(void)
717 {
718 	struct stat st;
719 
720 	if (sizeof(st.st_atim.tv_sec) != sizeof(st.st_atime))
721 		return 1;
722 
723 	if (stat("/proc/self/", &st) && stat(argv0, &st) && stat("/", &st))
724 		return 1;
725 
726 	if (st.st_atim.tv_sec != st.st_atime || st.st_atim.tv_nsec > 1000000000)
727 		return 1;
728 
729 	if (st.st_mtim.tv_sec != st.st_mtime || st.st_mtim.tv_nsec > 1000000000)
730 		return 1;
731 
732 	if (st.st_ctim.tv_sec != st.st_ctime || st.st_ctim.tv_nsec > 1000000000)
733 		return 1;
734 
735 	return 0;
736 }
737 
738 int test_mmap_munmap(void)
739 {
740 	int ret, fd, i, page_size;
741 	void *mem;
742 	size_t file_size, length;
743 	off_t offset, pa_offset;
744 	struct stat stat_buf;
745 	const char * const files[] = {
746 		"/dev/zero",
747 		"/proc/1/exe", "/proc/self/exe",
748 		argv0,
749 		NULL
750 	};
751 
752 	page_size = getpagesize();
753 	if (page_size < 0)
754 		return 1;
755 
756 	/* find a right file to mmap, existed and accessible */
757 	for (i = 0; files[i] != NULL; i++) {
758 		ret = fd = open(files[i], O_RDONLY);
759 		if (ret == -1)
760 			continue;
761 		else
762 			break;
763 	}
764 	if (ret == -1)
765 		return 1;
766 
767 	ret = stat(files[i], &stat_buf);
768 	if (ret == -1)
769 		goto end;
770 
771 	/* file size of the special /dev/zero is 0, let's assign one manually */
772 	if (i == 0)
773 		file_size = 3*page_size;
774 	else
775 		file_size = stat_buf.st_size;
776 
777 	offset = file_size - 1;
778 	if (offset < 0)
779 		offset = 0;
780 	length = file_size - offset;
781 	pa_offset = offset & ~(page_size - 1);
782 
783 	mem = mmap(NULL, length + offset - pa_offset, PROT_READ, MAP_SHARED, fd, pa_offset);
784 	if (mem == MAP_FAILED) {
785 		ret = 1;
786 		goto end;
787 	}
788 
789 	ret = munmap(mem, length + offset - pa_offset);
790 
791 end:
792 	close(fd);
793 	return !!ret;
794 }
795 
796 int test_pipe(void)
797 {
798 	const char *const msg = "hello, nolibc";
799 	int pipefd[2];
800 	char buf[32];
801 	size_t len;
802 
803 	if (pipe(pipefd) == -1)
804 		return 1;
805 
806 	write(pipefd[1], msg, strlen(msg));
807 	close(pipefd[1]);
808 	len = read(pipefd[0], buf, sizeof(buf));
809 	close(pipefd[0]);
810 
811 	if (len != strlen(msg))
812 		return 1;
813 
814 	return !!memcmp(buf, msg, len);
815 }
816 
817 
818 /* Run syscall tests between IDs <min> and <max>.
819  * Return 0 on success, non-zero on failure.
820  */
821 int run_syscall(int min, int max)
822 {
823 	struct timeval tv;
824 	struct timezone tz;
825 	struct stat stat_buf;
826 	int euid0;
827 	int proc;
828 	int test;
829 	int tmp;
830 	int ret = 0;
831 	void *p1, *p2;
832 	int has_gettid = 1;
833 
834 	/* <proc> indicates whether or not /proc is mounted */
835 	proc = stat("/proc", &stat_buf) == 0;
836 
837 	/* this will be used to skip certain tests that can't be run unprivileged */
838 	euid0 = geteuid() == 0;
839 
840 	/* from 2.30, glibc provides gettid() */
841 #if defined(__GLIBC_MINOR__) && defined(__GLIBC__)
842 	has_gettid = __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 30);
843 #endif
844 
845 	for (test = min; test >= 0 && test <= max; test++) {
846 		int llen = 0; /* line length */
847 
848 		/* avoid leaving empty lines below, this will insert holes into
849 		 * test numbers.
850 		 */
851 		switch (test + __LINE__ + 1) {
852 		CASE_TEST(getpid);            EXPECT_SYSNE(1, getpid(), -1); break;
853 		CASE_TEST(getppid);           EXPECT_SYSNE(1, getppid(), -1); break;
854 		CASE_TEST(gettid);            EXPECT_SYSNE(has_gettid, gettid(), -1); break;
855 		CASE_TEST(getpgid_self);      EXPECT_SYSNE(1, getpgid(0), -1); break;
856 		CASE_TEST(getpgid_bad);       EXPECT_SYSER(1, getpgid(-1), -1, ESRCH); break;
857 		CASE_TEST(kill_0);            EXPECT_SYSZR(1, kill(getpid(), 0)); break;
858 		CASE_TEST(kill_CONT);         EXPECT_SYSZR(1, kill(getpid(), 0)); break;
859 		CASE_TEST(kill_BADPID);       EXPECT_SYSER(1, kill(INT_MAX, 0), -1, ESRCH); break;
860 		CASE_TEST(sbrk_0);            EXPECT_PTRNE(1, sbrk(0), (void *)-1); break;
861 		CASE_TEST(sbrk);              if ((p1 = p2 = sbrk(4096)) != (void *)-1) p2 = sbrk(-4096); EXPECT_SYSZR(1, (p2 == (void *)-1) || p2 == p1); break;
862 		CASE_TEST(brk);               EXPECT_SYSZR(1, brk(sbrk(0))); break;
863 		CASE_TEST(chdir_root);        EXPECT_SYSZR(1, chdir("/")); chdir(getenv("PWD")); break;
864 		CASE_TEST(chdir_dot);         EXPECT_SYSZR(1, chdir(".")); break;
865 		CASE_TEST(chdir_blah);        EXPECT_SYSER(1, chdir("/blah"), -1, ENOENT); break;
866 		CASE_TEST(chmod_argv0);       EXPECT_SYSZR(1, chmod(argv0, 0555)); break;
867 		CASE_TEST(chmod_self);        EXPECT_SYSER(proc, chmod("/proc/self", 0555), -1, EPERM); break;
868 		CASE_TEST(chown_self);        EXPECT_SYSER(proc, chown("/proc/self", 0, 0), -1, EPERM); break;
869 		CASE_TEST(chroot_root);       EXPECT_SYSZR(euid0, chroot("/")); break;
870 		CASE_TEST(chroot_blah);       EXPECT_SYSER(1, chroot("/proc/self/blah"), -1, ENOENT); break;
871 		CASE_TEST(chroot_exe);        EXPECT_SYSER(1, chroot(argv0), -1, ENOTDIR); break;
872 		CASE_TEST(close_m1);          EXPECT_SYSER(1, close(-1), -1, EBADF); break;
873 		CASE_TEST(close_dup);         EXPECT_SYSZR(1, close(dup(0))); break;
874 		CASE_TEST(dup_0);             tmp = dup(0);  EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
875 		CASE_TEST(dup_m1);            tmp = dup(-1); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
876 		CASE_TEST(dup2_0);            tmp = dup2(0, 100);  EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
877 		CASE_TEST(dup2_m1);           tmp = dup2(-1, 100); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
878 		CASE_TEST(dup3_0);            tmp = dup3(0, 100, 0);  EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
879 		CASE_TEST(dup3_m1);           tmp = dup3(-1, 100, 0); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
880 		CASE_TEST(execve_root);       EXPECT_SYSER(1, execve("/", (char*[]){ [0] = "/", [1] = NULL }, NULL), -1, EACCES); break;
881 		CASE_TEST(fork);              EXPECT_SYSZR(1, test_fork()); break;
882 		CASE_TEST(getdents64_root);   EXPECT_SYSNE(1, test_getdents64("/"), -1); break;
883 		CASE_TEST(getdents64_null);   EXPECT_SYSER(1, test_getdents64("/dev/null"), -1, ENOTDIR); break;
884 		CASE_TEST(gettimeofday_tv);   EXPECT_SYSZR(1, gettimeofday(&tv, NULL)); break;
885 		CASE_TEST(gettimeofday_tv_tz);EXPECT_SYSZR(1, gettimeofday(&tv, &tz)); break;
886 		CASE_TEST(getpagesize);       EXPECT_SYSZR(1, test_getpagesize()); break;
887 		CASE_TEST(ioctl_tiocinq);     EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break;
888 		CASE_TEST(ioctl_tiocinq);     EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break;
889 		CASE_TEST(link_root1);        EXPECT_SYSER(1, link("/", "/"), -1, EEXIST); break;
890 		CASE_TEST(link_blah);         EXPECT_SYSER(1, link("/proc/self/blah", "/blah"), -1, ENOENT); break;
891 		CASE_TEST(link_dir);          EXPECT_SYSER(euid0, link("/", "/blah"), -1, EPERM); break;
892 		CASE_TEST(link_cross);        EXPECT_SYSER(proc, link("/proc/self/cmdline", "/blah"), -1, EXDEV); break;
893 		CASE_TEST(lseek_m1);          EXPECT_SYSER(1, lseek(-1, 0, SEEK_SET), -1, EBADF); break;
894 		CASE_TEST(lseek_0);           EXPECT_SYSER(1, lseek(0, 0, SEEK_SET), -1, ESPIPE); break;
895 		CASE_TEST(mkdir_root);        EXPECT_SYSER(1, mkdir("/", 0755), -1, EEXIST); break;
896 		CASE_TEST(mmap_bad);          EXPECT_PTRER(1, mmap(NULL, 0, PROT_READ, MAP_PRIVATE, 0, 0), MAP_FAILED, EINVAL); break;
897 		CASE_TEST(munmap_bad);        EXPECT_SYSER(1, munmap((void *)1, 0), -1, EINVAL); break;
898 		CASE_TEST(mmap_munmap_good);  EXPECT_SYSZR(1, test_mmap_munmap()); break;
899 		CASE_TEST(open_tty);          EXPECT_SYSNE(1, tmp = open("/dev/null", 0), -1); if (tmp != -1) close(tmp); break;
900 		CASE_TEST(open_blah);         EXPECT_SYSER(1, tmp = open("/proc/self/blah", 0), -1, ENOENT); if (tmp != -1) close(tmp); break;
901 		CASE_TEST(pipe);              EXPECT_SYSZR(1, test_pipe()); break;
902 		CASE_TEST(poll_null);         EXPECT_SYSZR(1, poll(NULL, 0, 0)); break;
903 		CASE_TEST(poll_stdout);       EXPECT_SYSNE(1, ({ struct pollfd fds = { 1, POLLOUT, 0}; poll(&fds, 1, 0); }), -1); break;
904 		CASE_TEST(poll_fault);        EXPECT_SYSER(1, poll((void *)1, 1, 0), -1, EFAULT); break;
905 		CASE_TEST(prctl);             EXPECT_SYSER(1, prctl(PR_SET_NAME, (unsigned long)NULL, 0, 0, 0), -1, EFAULT); break;
906 		CASE_TEST(read_badf);         EXPECT_SYSER(1, read(-1, &tmp, 1), -1, EBADF); break;
907 		CASE_TEST(rmdir_blah);        EXPECT_SYSER(1, rmdir("/blah"), -1, ENOENT); break;
908 		CASE_TEST(sched_yield);       EXPECT_SYSZR(1, sched_yield()); break;
909 		CASE_TEST(select_null);       EXPECT_SYSZR(1, ({ struct timeval tv = { 0 }; select(0, NULL, NULL, NULL, &tv); })); break;
910 		CASE_TEST(select_stdout);     EXPECT_SYSNE(1, ({ fd_set fds; FD_ZERO(&fds); FD_SET(1, &fds); select(2, NULL, &fds, NULL, NULL); }), -1); break;
911 		CASE_TEST(select_fault);      EXPECT_SYSER(1, select(1, (void *)1, NULL, NULL, 0), -1, EFAULT); break;
912 		CASE_TEST(stat_blah);         EXPECT_SYSER(1, stat("/proc/self/blah", &stat_buf), -1, ENOENT); break;
913 		CASE_TEST(stat_fault);        EXPECT_SYSER(1, stat((void *)1, &stat_buf), -1, EFAULT); break;
914 		CASE_TEST(stat_timestamps);   EXPECT_SYSZR(1, test_stat_timestamps()); break;
915 		CASE_TEST(symlink_root);      EXPECT_SYSER(1, symlink("/", "/"), -1, EEXIST); break;
916 		CASE_TEST(unlink_root);       EXPECT_SYSER(1, unlink("/"), -1, EISDIR); break;
917 		CASE_TEST(unlink_blah);       EXPECT_SYSER(1, unlink("/proc/self/blah"), -1, ENOENT); break;
918 		CASE_TEST(wait_child);        EXPECT_SYSER(1, wait(&tmp), -1, ECHILD); break;
919 		CASE_TEST(waitpid_min);       EXPECT_SYSER(1, waitpid(INT_MIN, &tmp, WNOHANG), -1, ESRCH); break;
920 		CASE_TEST(waitpid_child);     EXPECT_SYSER(1, waitpid(getpid(), &tmp, WNOHANG), -1, ECHILD); break;
921 		CASE_TEST(write_badf);        EXPECT_SYSER(1, write(-1, &tmp, 1), -1, EBADF); break;
922 		CASE_TEST(write_zero);        EXPECT_SYSZR(1, write(1, &tmp, 0)); break;
923 		CASE_TEST(syscall_noargs);    EXPECT_SYSEQ(1, syscall(__NR_getpid), getpid()); break;
924 		CASE_TEST(syscall_args);      EXPECT_SYSER(1, syscall(__NR_statx, 0, NULL, 0, 0, NULL), -1, EFAULT); break;
925 		case __LINE__:
926 			return ret; /* must be last */
927 		/* note: do not set any defaults so as to permit holes above */
928 		}
929 	}
930 	return ret;
931 }
932 
933 int run_stdlib(int min, int max)
934 {
935 	int test;
936 	int ret = 0;
937 
938 	for (test = min; test >= 0 && test <= max; test++) {
939 		int llen = 0; /* line length */
940 
941 		/* avoid leaving empty lines below, this will insert holes into
942 		 * test numbers.
943 		 */
944 		switch (test + __LINE__ + 1) {
945 		CASE_TEST(getenv_TERM);        EXPECT_STRNZ(1, getenv("TERM")); break;
946 		CASE_TEST(getenv_blah);        EXPECT_STRZR(1, getenv("blah")); break;
947 		CASE_TEST(setcmp_blah_blah);   EXPECT_EQ(1, strcmp("blah", "blah"), 0); break;
948 		CASE_TEST(setcmp_blah_blah2);  EXPECT_NE(1, strcmp("blah", "blah2"), 0); break;
949 		CASE_TEST(setncmp_blah_blah);  EXPECT_EQ(1, strncmp("blah", "blah", 10), 0); break;
950 		CASE_TEST(setncmp_blah_blah4); EXPECT_EQ(1, strncmp("blah", "blah4", 4), 0); break;
951 		CASE_TEST(setncmp_blah_blah5); EXPECT_NE(1, strncmp("blah", "blah5", 5), 0); break;
952 		CASE_TEST(setncmp_blah_blah6); EXPECT_NE(1, strncmp("blah", "blah6", 6), 0); break;
953 		CASE_TEST(strchr_foobar_o);    EXPECT_STREQ(1, strchr("foobar", 'o'), "oobar"); break;
954 		CASE_TEST(strchr_foobar_z);    EXPECT_STRZR(1, strchr("foobar", 'z')); break;
955 		CASE_TEST(strrchr_foobar_o);   EXPECT_STREQ(1, strrchr("foobar", 'o'), "obar"); break;
956 		CASE_TEST(strrchr_foobar_z);   EXPECT_STRZR(1, strrchr("foobar", 'z')); break;
957 		CASE_TEST(memcmp_20_20);       EXPECT_EQ(1, memcmp("aaa\x20", "aaa\x20", 4), 0); break;
958 		CASE_TEST(memcmp_20_60);       EXPECT_LT(1, memcmp("aaa\x20", "aaa\x60", 4), 0); break;
959 		CASE_TEST(memcmp_60_20);       EXPECT_GT(1, memcmp("aaa\x60", "aaa\x20", 4), 0); break;
960 		CASE_TEST(memcmp_20_e0);       EXPECT_LT(1, memcmp("aaa\x20", "aaa\xe0", 4), 0); break;
961 		CASE_TEST(memcmp_e0_20);       EXPECT_GT(1, memcmp("aaa\xe0", "aaa\x20", 4), 0); break;
962 		CASE_TEST(memcmp_80_e0);       EXPECT_LT(1, memcmp("aaa\x80", "aaa\xe0", 4), 0); break;
963 		CASE_TEST(memcmp_e0_80);       EXPECT_GT(1, memcmp("aaa\xe0", "aaa\x80", 4), 0); break;
964 		CASE_TEST(limit_int8_max);          EXPECT_EQ(1, INT8_MAX,         (int8_t)          0x7f); break;
965 		CASE_TEST(limit_int8_min);          EXPECT_EQ(1, INT8_MIN,         (int8_t)          0x80); break;
966 		CASE_TEST(limit_uint8_max);         EXPECT_EQ(1, UINT8_MAX,        (uint8_t)         0xff); break;
967 		CASE_TEST(limit_int16_max);         EXPECT_EQ(1, INT16_MAX,        (int16_t)         0x7fff); break;
968 		CASE_TEST(limit_int16_min);         EXPECT_EQ(1, INT16_MIN,        (int16_t)         0x8000); break;
969 		CASE_TEST(limit_uint16_max);        EXPECT_EQ(1, UINT16_MAX,       (uint16_t)        0xffff); break;
970 		CASE_TEST(limit_int32_max);         EXPECT_EQ(1, INT32_MAX,        (int32_t)         0x7fffffff); break;
971 		CASE_TEST(limit_int32_min);         EXPECT_EQ(1, INT32_MIN,        (int32_t)         0x80000000); break;
972 		CASE_TEST(limit_uint32_max);        EXPECT_EQ(1, UINT32_MAX,       (uint32_t)        0xffffffff); break;
973 		CASE_TEST(limit_int64_max);         EXPECT_EQ(1, INT64_MAX,        (int64_t)         0x7fffffffffffffff); break;
974 		CASE_TEST(limit_int64_min);         EXPECT_EQ(1, INT64_MIN,        (int64_t)         0x8000000000000000); break;
975 		CASE_TEST(limit_uint64_max);        EXPECT_EQ(1, UINT64_MAX,       (uint64_t)        0xffffffffffffffff); break;
976 		CASE_TEST(limit_int_least8_max);    EXPECT_EQ(1, INT_LEAST8_MAX,   (int_least8_t)    0x7f); break;
977 		CASE_TEST(limit_int_least8_min);    EXPECT_EQ(1, INT_LEAST8_MIN,   (int_least8_t)    0x80); break;
978 		CASE_TEST(limit_uint_least8_max);   EXPECT_EQ(1, UINT_LEAST8_MAX,  (uint_least8_t)   0xff); break;
979 		CASE_TEST(limit_int_least16_max);   EXPECT_EQ(1, INT_LEAST16_MAX,  (int_least16_t)   0x7fff); break;
980 		CASE_TEST(limit_int_least16_min);   EXPECT_EQ(1, INT_LEAST16_MIN,  (int_least16_t)   0x8000); break;
981 		CASE_TEST(limit_uint_least16_max);  EXPECT_EQ(1, UINT_LEAST16_MAX, (uint_least16_t)  0xffff); break;
982 		CASE_TEST(limit_int_least32_max);   EXPECT_EQ(1, INT_LEAST32_MAX,  (int_least32_t)   0x7fffffff); break;
983 		CASE_TEST(limit_int_least32_min);   EXPECT_EQ(1, INT_LEAST32_MIN,  (int_least32_t)   0x80000000); break;
984 		CASE_TEST(limit_uint_least32_max);  EXPECT_EQ(1, UINT_LEAST32_MAX, (uint_least32_t)  0xffffffffU); break;
985 		CASE_TEST(limit_int_least64_min);   EXPECT_EQ(1, INT_LEAST64_MIN,  (int_least64_t)   0x8000000000000000LL); break;
986 		CASE_TEST(limit_int_least64_max);   EXPECT_EQ(1, INT_LEAST64_MAX,  (int_least64_t)   0x7fffffffffffffffLL); break;
987 		CASE_TEST(limit_uint_least64_max);  EXPECT_EQ(1, UINT_LEAST64_MAX, (uint_least64_t)  0xffffffffffffffffULL); break;
988 		CASE_TEST(limit_int_fast8_max);     EXPECT_EQ(1, INT_FAST8_MAX,    (int_fast8_t)     0x7f); break;
989 		CASE_TEST(limit_int_fast8_min);     EXPECT_EQ(1, INT_FAST8_MIN,    (int_fast8_t)     0x80); break;
990 		CASE_TEST(limit_uint_fast8_max);    EXPECT_EQ(1, UINT_FAST8_MAX,   (uint_fast8_t)    0xff); break;
991 		CASE_TEST(limit_int_fast16_min);    EXPECT_EQ(1, INT_FAST16_MIN,   (int_fast16_t)    SINT_MIN_OF_TYPE(int_fast16_t)); break;
992 		CASE_TEST(limit_int_fast16_max);    EXPECT_EQ(1, INT_FAST16_MAX,   (int_fast16_t)    SINT_MAX_OF_TYPE(int_fast16_t)); break;
993 		CASE_TEST(limit_uint_fast16_max);   EXPECT_EQ(1, UINT_FAST16_MAX,  (uint_fast16_t)   UINTPTR_MAX); break;
994 		CASE_TEST(limit_int_fast32_min);    EXPECT_EQ(1, INT_FAST32_MIN,   (int_fast32_t)    SINT_MIN_OF_TYPE(int_fast32_t)); break;
995 		CASE_TEST(limit_int_fast32_max);    EXPECT_EQ(1, INT_FAST32_MAX,   (int_fast32_t)    SINT_MAX_OF_TYPE(int_fast32_t)); break;
996 		CASE_TEST(limit_uint_fast32_max);   EXPECT_EQ(1, UINT_FAST32_MAX,  (uint_fast32_t)   UINTPTR_MAX); break;
997 		CASE_TEST(limit_int_fast64_min);    EXPECT_EQ(1, INT_FAST64_MIN,   (int_fast64_t)    INT64_MIN); break;
998 		CASE_TEST(limit_int_fast64_max);    EXPECT_EQ(1, INT_FAST64_MAX,   (int_fast64_t)    INT64_MAX); break;
999 		CASE_TEST(limit_uint_fast64_max);   EXPECT_EQ(1, UINT_FAST64_MAX,  (uint_fast64_t)   UINT64_MAX); break;
1000 		CASE_TEST(sizeof_long_sane);        EXPECT_EQ(1, sizeof(long) == 8 || sizeof(long) == 4, 1); break;
1001 		CASE_TEST(limit_intptr_min);        EXPECT_EQ(1, INTPTR_MIN,  sizeof(long) == 8 ? (intptr_t)  0x8000000000000000LL  : (intptr_t)  0x80000000); break;
1002 		CASE_TEST(limit_intptr_max);        EXPECT_EQ(1, INTPTR_MAX,  sizeof(long) == 8 ? (intptr_t)  0x7fffffffffffffffLL  : (intptr_t)  0x7fffffff); break;
1003 		CASE_TEST(limit_uintptr_max);       EXPECT_EQ(1, UINTPTR_MAX, sizeof(long) == 8 ? (uintptr_t) 0xffffffffffffffffULL : (uintptr_t) 0xffffffffU); break;
1004 		CASE_TEST(limit_ptrdiff_min);       EXPECT_EQ(1, PTRDIFF_MIN, sizeof(long) == 8 ? (ptrdiff_t) 0x8000000000000000LL  : (ptrdiff_t) 0x80000000); break;
1005 		CASE_TEST(limit_ptrdiff_max);       EXPECT_EQ(1, PTRDIFF_MAX, sizeof(long) == 8 ? (ptrdiff_t) 0x7fffffffffffffffLL  : (ptrdiff_t) 0x7fffffff); break;
1006 		CASE_TEST(limit_size_max);          EXPECT_EQ(1, SIZE_MAX,    sizeof(long) == 8 ? (size_t)    0xffffffffffffffffULL : (size_t)    0xffffffffU); break;
1007 
1008 		case __LINE__:
1009 			return ret; /* must be last */
1010 		/* note: do not set any defaults so as to permit holes above */
1011 		}
1012 	}
1013 	return ret;
1014 }
1015 
1016 #define EXPECT_VFPRINTF(c, expected, fmt, ...)				\
1017 	ret += expect_vfprintf(llen, c, expected, fmt, ##__VA_ARGS__)
1018 
1019 static int expect_vfprintf(int llen, int c, const char *expected, const char *fmt, ...)
1020 {
1021 	int ret, fd;
1022 	ssize_t w, r;
1023 	char buf[100];
1024 	FILE *memfile;
1025 	va_list args;
1026 
1027 	fd = open("/tmp", O_TMPFILE | O_EXCL | O_RDWR, 0600);
1028 	if (fd == -1) {
1029 		result(llen, SKIPPED);
1030 		return 0;
1031 	}
1032 
1033 	memfile = fdopen(fd, "w+");
1034 	if (!memfile) {
1035 		result(llen, FAIL);
1036 		return 1;
1037 	}
1038 
1039 	va_start(args, fmt);
1040 	w = vfprintf(memfile, fmt, args);
1041 	va_end(args);
1042 
1043 	if (w != c) {
1044 		llen += printf(" written(%d) != %d", (int)w, c);
1045 		result(llen, FAIL);
1046 		return 1;
1047 	}
1048 
1049 	fflush(memfile);
1050 	lseek(fd, 0, SEEK_SET);
1051 
1052 	r = read(fd, buf, sizeof(buf) - 1);
1053 
1054 	fclose(memfile);
1055 
1056 	if (r != w) {
1057 		llen += printf(" written(%d) != read(%d)", (int)w, (int)r);
1058 		result(llen, FAIL);
1059 		return 1;
1060 	}
1061 
1062 	buf[r] = '\0';
1063 	llen += printf(" \"%s\" = \"%s\"", expected, buf);
1064 	ret = strncmp(expected, buf, c);
1065 
1066 	result(llen, ret ? FAIL : OK);
1067 	return ret;
1068 }
1069 
1070 static int run_vfprintf(int min, int max)
1071 {
1072 	int test;
1073 	int ret = 0;
1074 
1075 	for (test = min; test >= 0 && test <= max; test++) {
1076 		int llen = 0; /* line length */
1077 
1078 		/* avoid leaving empty lines below, this will insert holes into
1079 		 * test numbers.
1080 		 */
1081 		switch (test + __LINE__ + 1) {
1082 		CASE_TEST(empty);        EXPECT_VFPRINTF(0, "", ""); break;
1083 		CASE_TEST(simple);       EXPECT_VFPRINTF(3, "foo", "foo"); break;
1084 		CASE_TEST(string);       EXPECT_VFPRINTF(3, "foo", "%s", "foo"); break;
1085 		CASE_TEST(number);       EXPECT_VFPRINTF(4, "1234", "%d", 1234); break;
1086 		CASE_TEST(negnumber);    EXPECT_VFPRINTF(5, "-1234", "%d", -1234); break;
1087 		CASE_TEST(unsigned);     EXPECT_VFPRINTF(5, "12345", "%u", 12345); break;
1088 		CASE_TEST(char);         EXPECT_VFPRINTF(1, "c", "%c", 'c'); break;
1089 		CASE_TEST(hex);          EXPECT_VFPRINTF(1, "f", "%x", 0xf); break;
1090 		CASE_TEST(pointer);      EXPECT_VFPRINTF(3, "0x1", "%p", (void *) 0x1); break;
1091 		case __LINE__:
1092 			return ret; /* must be last */
1093 		/* note: do not set any defaults so as to permit holes above */
1094 		}
1095 	}
1096 	return ret;
1097 }
1098 
1099 static int smash_stack(void)
1100 {
1101 	char buf[100];
1102 	volatile char *ptr = buf;
1103 	size_t i;
1104 
1105 	for (i = 0; i < 200; i++)
1106 		ptr[i] = 'P';
1107 
1108 	return 1;
1109 }
1110 
1111 static int run_protection(int min __attribute__((unused)),
1112 			  int max __attribute__((unused)))
1113 {
1114 	pid_t pid;
1115 	int llen = 0, status;
1116 
1117 	llen += printf("0 -fstackprotector ");
1118 
1119 #if !defined(_NOLIBC_STACKPROTECTOR)
1120 	llen += printf("not supported");
1121 	result(llen, SKIPPED);
1122 	return 0;
1123 #endif
1124 
1125 #if defined(_NOLIBC_STACKPROTECTOR)
1126 	if (!__stack_chk_guard) {
1127 		llen += printf("__stack_chk_guard not initialized");
1128 		result(llen, FAIL);
1129 		return 1;
1130 	}
1131 #endif
1132 
1133 	pid = -1;
1134 	pid = fork();
1135 
1136 	switch (pid) {
1137 	case -1:
1138 		llen += printf("fork()");
1139 		result(llen, FAIL);
1140 		return 1;
1141 
1142 	case 0:
1143 		close(STDOUT_FILENO);
1144 		close(STDERR_FILENO);
1145 
1146 		prctl(PR_SET_DUMPABLE, 0, 0, 0, 0);
1147 		smash_stack();
1148 		return 1;
1149 
1150 	default:
1151 		pid = waitpid(pid, &status, 0);
1152 
1153 		if (pid == -1 || !WIFSIGNALED(status) || WTERMSIG(status) != SIGABRT) {
1154 			llen += printf("waitpid()");
1155 			result(llen, FAIL);
1156 			return 1;
1157 		}
1158 		result(llen, OK);
1159 		return 0;
1160 	}
1161 }
1162 
1163 /* prepare what needs to be prepared for pid 1 (stdio, /dev, /proc, etc) */
1164 int prepare(void)
1165 {
1166 	struct stat stat_buf;
1167 
1168 	/* It's possible that /dev doesn't even exist or was not mounted, so
1169 	 * we'll try to create it, mount it, or create minimal entries into it.
1170 	 * We want at least /dev/null and /dev/console.
1171 	 */
1172 	if (stat("/dev/.", &stat_buf) == 0 || mkdir("/dev", 0755) == 0) {
1173 		if (stat("/dev/console", &stat_buf) != 0 ||
1174 		    stat("/dev/null", &stat_buf) != 0 ||
1175 		    stat("/dev/zero", &stat_buf) != 0) {
1176 			/* try devtmpfs first, otherwise fall back to manual creation */
1177 			if (mount("/dev", "/dev", "devtmpfs", 0, 0) != 0) {
1178 				mknod("/dev/console", 0600 | S_IFCHR, makedev(5, 1));
1179 				mknod("/dev/null",    0666 | S_IFCHR, makedev(1, 3));
1180 				mknod("/dev/zero",    0666 | S_IFCHR, makedev(1, 5));
1181 			}
1182 		}
1183 	}
1184 
1185 	/* If no /dev/console was found before calling init, stdio is closed so
1186 	 * we need to reopen it from /dev/console. If it failed above, it will
1187 	 * still fail here and we cannot emit a message anyway.
1188 	 */
1189 	if (close(dup(1)) == -1) {
1190 		int fd = open("/dev/console", O_RDWR);
1191 
1192 		if (fd >= 0) {
1193 			if (fd != 0)
1194 				dup2(fd, 0);
1195 			if (fd != 1)
1196 				dup2(fd, 1);
1197 			if (fd != 2)
1198 				dup2(fd, 2);
1199 			if (fd > 2)
1200 				close(fd);
1201 			puts("\nSuccessfully reopened /dev/console.");
1202 		}
1203 	}
1204 
1205 	/* try to mount /proc if not mounted. Silently fail otherwise */
1206 	if (stat("/proc/.", &stat_buf) == 0 || mkdir("/proc", 0755) == 0) {
1207 		if (stat("/proc/self", &stat_buf) != 0) {
1208 			/* If not mountable, remove /proc completely to avoid misuse */
1209 			if (mount("none", "/proc", "proc", 0, 0) != 0)
1210 				rmdir("/proc");
1211 		}
1212 	}
1213 
1214 	/* some tests rely on a writable /tmp */
1215 	mkdir("/tmp", 0755);
1216 
1217 	return 0;
1218 }
1219 
1220 /* This is the definition of known test names, with their functions */
1221 static const struct test test_names[] = {
1222 	/* add new tests here */
1223 	{ .name = "startup",    .func = run_startup    },
1224 	{ .name = "syscall",    .func = run_syscall    },
1225 	{ .name = "stdlib",     .func = run_stdlib     },
1226 	{ .name = "vfprintf",   .func = run_vfprintf   },
1227 	{ .name = "protection", .func = run_protection },
1228 	{ 0 }
1229 };
1230 
1231 static int is_setting_valid(char *test)
1232 {
1233 	int idx, len, test_len, valid = 0;
1234 	char delimiter;
1235 
1236 	if (!test)
1237 		return valid;
1238 
1239 	test_len = strlen(test);
1240 
1241 	for (idx = 0; test_names[idx].name; idx++) {
1242 		len = strlen(test_names[idx].name);
1243 		if (test_len < len)
1244 			continue;
1245 
1246 		if (strncmp(test, test_names[idx].name, len) != 0)
1247 			continue;
1248 
1249 		delimiter = test[len];
1250 		if (delimiter != ':' && delimiter != ',' && delimiter != '\0')
1251 			continue;
1252 
1253 		valid = 1;
1254 		break;
1255 	}
1256 
1257 	return valid;
1258 }
1259 
1260 int main(int argc, char **argv, char **envp)
1261 {
1262 	int min = 0;
1263 	int max = INT_MAX;
1264 	int ret = 0;
1265 	int err;
1266 	int idx;
1267 	char *test;
1268 
1269 	argv0 = argv[0];
1270 	test_argc = argc;
1271 	test_argv = argv;
1272 	test_envp = envp;
1273 
1274 	/* when called as init, it's possible that no console was opened, for
1275 	 * example if no /dev file system was provided. We'll check that fd#1
1276 	 * was opened, and if not we'll attempt to create and open /dev/console
1277 	 * and /dev/null that we'll use for later tests.
1278 	 */
1279 	if (getpid() == 1)
1280 		prepare();
1281 
1282 	/* the definition of a series of tests comes from either argv[1] or the
1283 	 * "NOLIBC_TEST" environment variable. It's made of a comma-delimited
1284 	 * series of test names and optional ranges:
1285 	 *    syscall:5-15[:.*],stdlib:8-10
1286 	 */
1287 	test = argv[1];
1288 	if (!is_setting_valid(test))
1289 		test = getenv("NOLIBC_TEST");
1290 
1291 	if (is_setting_valid(test)) {
1292 		char *comma, *colon, *dash, *value;
1293 
1294 		do {
1295 			comma = strchr(test, ',');
1296 			if (comma)
1297 				*(comma++) = '\0';
1298 
1299 			colon = strchr(test, ':');
1300 			if (colon)
1301 				*(colon++) = '\0';
1302 
1303 			for (idx = 0; test_names[idx].name; idx++) {
1304 				if (strcmp(test, test_names[idx].name) == 0)
1305 					break;
1306 			}
1307 
1308 			if (test_names[idx].name) {
1309 				/* The test was named, it will be called at least
1310 				 * once. We may have an optional range at <colon>
1311 				 * here, which defaults to the full range.
1312 				 */
1313 				do {
1314 					min = 0; max = INT_MAX;
1315 					value = colon;
1316 					if (value && *value) {
1317 						colon = strchr(value, ':');
1318 						if (colon)
1319 							*(colon++) = '\0';
1320 
1321 						dash = strchr(value, '-');
1322 						if (dash)
1323 							*(dash++) = '\0';
1324 
1325 						/* support :val: :min-max: :min-: :-max: */
1326 						if (*value)
1327 							min = atoi(value);
1328 						if (!dash)
1329 							max = min;
1330 						else if (*dash)
1331 							max = atoi(dash);
1332 
1333 						value = colon;
1334 					}
1335 
1336 					/* now's time to call the test */
1337 					printf("Running test '%s'\n", test_names[idx].name);
1338 					err = test_names[idx].func(min, max);
1339 					ret += err;
1340 					printf("Errors during this test: %d\n\n", err);
1341 				} while (colon && *colon);
1342 			} else
1343 				printf("Ignoring unknown test name '%s'\n", test);
1344 
1345 			test = comma;
1346 		} while (test && *test);
1347 	} else {
1348 		/* no test mentioned, run everything */
1349 		for (idx = 0; test_names[idx].name; idx++) {
1350 			printf("Running test '%s'\n", test_names[idx].name);
1351 			err = test_names[idx].func(min, max);
1352 			ret += err;
1353 			printf("Errors during this test: %d\n\n", err);
1354 		}
1355 	}
1356 
1357 	printf("Total number of errors: %d\n", ret);
1358 
1359 	if (getpid() == 1) {
1360 		/* we're running as init, there's no other process on the
1361 		 * system, thus likely started from a VM for a quick check.
1362 		 * Exiting will provoke a kernel panic that may be reported
1363 		 * as an error by Qemu or the hypervisor, while stopping
1364 		 * cleanly will often be reported as a success. This allows
1365 		 * to use the output of this program for bisecting kernels.
1366 		 */
1367 		printf("Leaving init with final status: %d\n", !!ret);
1368 		if (ret == 0)
1369 			reboot(RB_POWER_OFF);
1370 #if defined(__x86_64__)
1371 		/* QEMU started with "-device isa-debug-exit -no-reboot" will
1372 		 * exit with status code 2N+1 when N is written to 0x501. We
1373 		 * hard-code the syscall here as it's arch-dependent.
1374 		 */
1375 		else if (syscall(__NR_ioperm, 0x501, 1, 1) == 0)
1376 			__asm__ volatile ("outb %%al, %%dx" :: "d"(0x501), "a"(0));
1377 		/* if it does nothing, fall back to the regular panic */
1378 #endif
1379 	}
1380 
1381 	printf("Exiting with status %d\n", !!ret);
1382 	return !!ret;
1383 }
1384