nolibc-test.c

   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#include <stdio.h>
  13#include <stdlib.h>
  14#include <string.h>
  15#include <sys/auxv.h>
  16#include <sys/ioctl.h>
  17#include <sys/mman.h>
  18#include <sys/mount.h>
  19#include <sys/prctl.h>
  20#include <sys/random.h>
  21#include <sys/reboot.h>
  22#include <sys/resource.h>
  23#include <sys/stat.h>
  24#include <sys/syscall.h>
  25#include <sys/sysmacros.h>
  26#include <sys/time.h>
  27#include <sys/timerfd.h>
  28#include <sys/uio.h>
  29#include <sys/utsname.h>
  30#include <sys/wait.h>
  31#include <dirent.h>
  32#include <errno.h>
  33#include <fcntl.h>
  34#include <poll.h>
  35#include <sched.h>
  36#include <signal.h>
  37#include <stdarg.h>
  38#include <stddef.h>
  39#include <stdint.h>
  40#include <time.h>
  41#include <unistd.h>
  42#include <limits.h>
  43#include <ctype.h>
  44
  45#pragma GCC diagnostic ignored "-Wmissing-prototypes"
  46
  47#include "nolibc-test-linkage.h"
  48
  49/* for the type of int_fast16_t and int_fast32_t, musl differs from glibc and nolibc */
  50#define SINT_MAX_OF_TYPE(type) (((type)1 << (sizeof(type) * 8 - 2)) - (type)1 + ((type)1 << (sizeof(type) * 8 - 2)))
  51#define SINT_MIN_OF_TYPE(type) (-SINT_MAX_OF_TYPE(type) - 1)
  52
  53/* will be used to test initialization of environ */
  54static char **test_envp;
  55
  56/* will be used to test initialization of argv */
  57static char **test_argv;
  58
  59/* will be used to test initialization of argc */
  60static int test_argc;
  61
  62/* will be used by some test cases as readable file, please don't write it */
  63static const char *argv0;
  64
  65/* will be used by constructor tests */
  66static int constructor_test_value;
  67
  68static const int is_nolibc =
  69#ifdef NOLIBC
  70	1
  71#else
  72	0
  73#endif
  74;
  75
  76/* definition of a series of tests */
  77struct test {
  78	const char *name;              /* test name */
  79	int (*func)(int min, int max); /* handler */
  80};
  81
  82#ifndef _NOLIBC_STDLIB_H
  83char *itoa(int i)
  84{
  85	static char buf[12];
  86	int ret;
  87
  88	ret = snprintf(buf, sizeof(buf), "%d", i);
  89	return (ret >= 0 && ret < sizeof(buf)) ? buf : "#err";
  90}
  91#endif
  92
  93#define CASE_ERR(err) \
  94	case err: return #err
  95
  96/* returns the error name (e.g. "ENOENT") for common errors, "SUCCESS" for 0,
  97 * or the decimal value for less common ones.
  98 */
  99static const char *errorname(int err)
 100{
 101	switch (err) {
 102	case 0: return "SUCCESS";
 103	CASE_ERR(EPERM);
 104	CASE_ERR(ENOENT);
 105	CASE_ERR(ESRCH);
 106	CASE_ERR(EINTR);
 107	CASE_ERR(EIO);
 108	CASE_ERR(ENXIO);
 109	CASE_ERR(E2BIG);
 110	CASE_ERR(ENOEXEC);
 111	CASE_ERR(EBADF);
 112	CASE_ERR(ECHILD);
 113	CASE_ERR(EAGAIN);
 114	CASE_ERR(ENOMEM);
 115	CASE_ERR(EACCES);
 116	CASE_ERR(EFAULT);
 117	CASE_ERR(ENOTBLK);
 118	CASE_ERR(EBUSY);
 119	CASE_ERR(EEXIST);
 120	CASE_ERR(EXDEV);
 121	CASE_ERR(ENODEV);
 122	CASE_ERR(ENOTDIR);
 123	CASE_ERR(EISDIR);
 124	CASE_ERR(EINVAL);
 125	CASE_ERR(ENFILE);
 126	CASE_ERR(EMFILE);
 127	CASE_ERR(ENOTTY);
 128	CASE_ERR(ETXTBSY);
 129	CASE_ERR(EFBIG);
 130	CASE_ERR(ENOSPC);
 131	CASE_ERR(ESPIPE);
 132	CASE_ERR(EROFS);
 133	CASE_ERR(EMLINK);
 134	CASE_ERR(EPIPE);
 135	CASE_ERR(EDOM);
 136	CASE_ERR(ERANGE);
 137	CASE_ERR(ENOSYS);
 138	CASE_ERR(EOVERFLOW);
 139	default:
 140		return itoa(err);
 141	}
 142}
 143
 144static void align_result(size_t llen)
 145{
 146	const size_t align = 64;
 147	char buf[align];
 148	size_t n;
 149
 150	if (llen >= align)
 151		return;
 152
 153	n = align - llen;
 154	memset(buf, ' ', n);
 155	buf[n] = '\0';
 156	fputs(buf, stdout);
 157}
 158
 159enum RESULT {
 160	OK,
 161	FAIL,
 162	SKIPPED,
 163};
 164
 165static void result(int llen, enum RESULT r)
 166{
 167	const char *msg;
 168
 169	if (r == OK)
 170		msg = "  [OK]";
 171	else if (r == SKIPPED)
 172		msg = "[SKIPPED]";
 173	else
 174		msg = " [FAIL]";
 175
 176	align_result(llen);
 177	puts(msg);
 178}
 179
 180/* The tests below are intended to be used by the macroes, which evaluate
 181 * expression <expr>, print the status to stdout, and update the "ret"
 182 * variable to count failures. The functions themselves return the number
 183 * of failures, thus either 0 or 1.
 184 */
 185
 186#define EXPECT_ZR(cond, expr)				\
 187	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_zr(expr, llen); } while (0)
 188
 189static __attribute__((unused))
 190int expect_zr(int expr, int llen)
 191{
 192	int ret = !(expr == 0);
 193
 194	llen += printf(" = %d ", expr);
 195	result(llen, ret ? FAIL : OK);
 196	return ret;
 197}
 198
 199
 200#define EXPECT_NZ(cond, expr)				\
 201	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_nz(expr, llen); } while (0)
 202
 203static __attribute__((unused))
 204int expect_nz(int expr, int llen)
 205{
 206	int ret = !(expr != 0);
 207
 208	llen += printf(" = %d ", expr);
 209	result(llen, ret ? FAIL : OK);
 210	return ret;
 211}
 212
 213
 214#define EXPECT_EQ(cond, expr, val)				\
 215	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_eq(expr, llen, val); } while (0)
 216
 217static __attribute__((unused))
 218int expect_eq(uint64_t expr, int llen, uint64_t val)
 219{
 220	int ret = !(expr == val);
 221
 222	llen += printf(" = %lld ", (long long)expr);
 223	result(llen, ret ? FAIL : OK);
 224	return ret;
 225}
 226
 227
 228#define EXPECT_NE(cond, expr, val)				\
 229	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ne(expr, llen, val); } while (0)
 230
 231static __attribute__((unused))
 232int expect_ne(int expr, int llen, int val)
 233{
 234	int ret = !(expr != val);
 235
 236	llen += printf(" = %d ", expr);
 237	result(llen, ret ? FAIL : OK);
 238	return ret;
 239}
 240
 241
 242#define EXPECT_GE(cond, expr, val)				\
 243	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ge(expr, llen, val); } while (0)
 244
 245static __attribute__((unused))
 246int expect_ge(int expr, int llen, int val)
 247{
 248	int ret = !(expr >= val);
 249
 250	llen += printf(" = %d ", expr);
 251	result(llen, ret ? FAIL : OK);
 252	return ret;
 253}
 254
 255
 256#define EXPECT_GT(cond, expr, val)				\
 257	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_gt(expr, llen, val); } while (0)
 258
 259static __attribute__((unused))
 260int expect_gt(int expr, int llen, int val)
 261{
 262	int ret = !(expr > val);
 263
 264	llen += printf(" = %d ", expr);
 265	result(llen, ret ? FAIL : OK);
 266	return ret;
 267}
 268
 269
 270#define EXPECT_LE(cond, expr, val)				\
 271	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_le(expr, llen, val); } while (0)
 272
 273static __attribute__((unused))
 274int expect_le(int expr, int llen, int val)
 275{
 276	int ret = !(expr <= val);
 277
 278	llen += printf(" = %d ", expr);
 279	result(llen, ret ? FAIL : OK);
 280	return ret;
 281}
 282
 283
 284#define EXPECT_LT(cond, expr, val)				\
 285	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_lt(expr, llen, val); } while (0)
 286
 287static __attribute__((unused))
 288int expect_lt(int expr, int llen, int val)
 289{
 290	int ret = !(expr < val);
 291
 292	llen += printf(" = %d ", expr);
 293	result(llen, ret ? FAIL : OK);
 294	return ret;
 295}
 296
 297
 298#define EXPECT_SYSZR(cond, expr)				\
 299	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_syszr(expr, llen); } while (0)
 300
 301static __attribute__((unused))
 302int expect_syszr(int expr, int llen)
 303{
 304	int ret = 0;
 305
 306	if (errno == ENOSYS) {
 307		llen += printf(" = ENOSYS");
 308		result(llen, SKIPPED);
 309	} else if (expr) {
 310		ret = 1;
 311		llen += printf(" = %d %s ", expr, errorname(errno));
 312		result(llen, FAIL);
 313	} else {
 314		llen += printf(" = %d ", expr);
 315		result(llen, OK);
 316	}
 317	return ret;
 318}
 319
 320
 321#define EXPECT_SYSEQ(cond, expr, val)				\
 322	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_syseq(expr, llen, val); } while (0)
 323
 324static __attribute__((unused))
 325int expect_syseq(int expr, int llen, int val)
 326{
 327	int ret = 0;
 328
 329	if (expr != val) {
 330		ret = 1;
 331		llen += printf(" = %d %s ", expr, errorname(errno));
 332		result(llen, FAIL);
 333	} else {
 334		llen += printf(" = %d ", expr);
 335		result(llen, OK);
 336	}
 337	return ret;
 338}
 339
 340
 341#define EXPECT_SYSNE(cond, expr, val)				\
 342	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_sysne(expr, llen, val); } while (0)
 343
 344static __attribute__((unused))
 345int expect_sysne(int expr, int llen, int val)
 346{
 347	int ret = 0;
 348
 349	if (errno == ENOSYS) {
 350		llen += printf(" = ENOSYS");
 351		result(llen, SKIPPED);
 352	} else if (expr == val) {
 353		ret = 1;
 354		llen += printf(" = %d %s ", expr, errorname(errno));
 355		result(llen, FAIL);
 356	} else {
 357		llen += printf(" = %d ", expr);
 358		result(llen, OK);
 359	}
 360	return ret;
 361}
 362
 363
 364#define EXPECT_SYSER2(cond, expr, expret, experr1, experr2)		\
 365	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_syserr2(expr, expret, experr1, experr2, llen); } while (0)
 366
 367#define EXPECT_SYSER(cond, expr, expret, experr)			\
 368	EXPECT_SYSER2(cond, expr, expret, experr, 0)
 369
 370static __attribute__((unused))
 371int expect_syserr2(int expr, int expret, int experr1, int experr2, int llen)
 372{
 373	int ret = 0;
 374	int _errno = errno;
 375
 376	llen += printf(" = %d %s ", expr, errorname(_errno));
 377	if (errno == ENOSYS) {
 378		result(llen, SKIPPED);
 379	} else if (expr != expret || (_errno != experr1 && _errno != experr2)) {
 380		ret = 1;
 381		if (experr2 == 0)
 382			llen += printf(" != (%d %s) ", expret, errorname(experr1));
 383		else
 384			llen += printf(" != (%d %s %s) ", expret, errorname(experr1), errorname(experr2));
 385		result(llen, FAIL);
 386	} else {
 387		result(llen, OK);
 388	}
 389	return ret;
 390}
 391
 392
 393#define EXPECT_PTRZR(cond, expr)				\
 394	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrzr(expr, llen); } while (0)
 395
 396static __attribute__((unused))
 397int expect_ptrzr(const void *expr, int llen)
 398{
 399	int ret = 0;
 400
 401	llen += printf(" = <%p> ", expr);
 402	if (expr) {
 403		ret = 1;
 404		result(llen, FAIL);
 405	} else {
 406		result(llen, OK);
 407	}
 408	return ret;
 409}
 410
 411
 412#define EXPECT_PTRNZ(cond, expr)				\
 413	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrnz(expr, llen); } while (0)
 414
 415static __attribute__((unused))
 416int expect_ptrnz(const void *expr, int llen)
 417{
 418	int ret = 0;
 419
 420	llen += printf(" = <%p> ", expr);
 421	if (!expr) {
 422		ret = 1;
 423		result(llen, FAIL);
 424	} else {
 425		result(llen, OK);
 426	}
 427	return ret;
 428}
 429
 430#define EXPECT_PTREQ(cond, expr, cmp)				\
 431	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptreq(expr, llen, cmp); } while (0)
 432
 433static __attribute__((unused))
 434int expect_ptreq(const void *expr, int llen, const void *cmp)
 435{
 436	int ret = 0;
 437
 438	llen += printf(" = <%p> ", expr);
 439	if (expr != cmp) {
 440		ret = 1;
 441		result(llen, FAIL);
 442	} else {
 443		result(llen, OK);
 444	}
 445	return ret;
 446}
 447
 448#define EXPECT_PTRNE(cond, expr, cmp)				\
 449	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrne(expr, llen, cmp); } while (0)
 450
 451static __attribute__((unused))
 452int expect_ptrne(const void *expr, int llen, const void *cmp)
 453{
 454	int ret = 0;
 455
 456	llen += printf(" = <%p> ", expr);
 457	if (expr == cmp) {
 458		ret = 1;
 459		result(llen, FAIL);
 460	} else {
 461		result(llen, OK);
 462	}
 463	return ret;
 464}
 465
 466#define EXPECT_PTRGE(cond, expr, cmp)				\
 467	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrge(expr, llen, cmp); } while (0)
 468
 469static __attribute__((unused))
 470int expect_ptrge(const void *expr, int llen, const void *cmp)
 471{
 472	int ret = !(expr >= cmp);
 473
 474	llen += printf(" = <%p> ", expr);
 475	result(llen, ret ? FAIL : OK);
 476	return ret;
 477}
 478
 479#define EXPECT_PTRGT(cond, expr, cmp)				\
 480	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrgt(expr, llen, cmp); } while (0)
 481
 482static __attribute__((unused))
 483int expect_ptrgt(const void *expr, int llen, const void *cmp)
 484{
 485	int ret = !(expr > cmp);
 486
 487	llen += printf(" = <%p> ", expr);
 488	result(llen, ret ? FAIL : OK);
 489	return ret;
 490}
 491
 492
 493#define EXPECT_PTRLE(cond, expr, cmp)				\
 494	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrle(expr, llen, cmp); } while (0)
 495
 496static __attribute__((unused))
 497int expect_ptrle(const void *expr, int llen, const void *cmp)
 498{
 499	int ret = !(expr <= cmp);
 500
 501	llen += printf(" = <%p> ", expr);
 502	result(llen, ret ? FAIL : OK);
 503	return ret;
 504}
 505
 506
 507#define EXPECT_PTRLT(cond, expr, cmp)				\
 508	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrlt(expr, llen, cmp); } while (0)
 509
 510static __attribute__((unused))
 511int expect_ptrlt(const void *expr, int llen, const void *cmp)
 512{
 513	int ret = !(expr < cmp);
 514
 515	llen += printf(" = <%p> ", expr);
 516	result(llen, ret ? FAIL : OK);
 517	return ret;
 518}
 519
 520#define EXPECT_PTRER2(cond, expr, expret, experr1, experr2)		\
 521	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrerr2(expr, expret, experr1, experr2, llen); } while (0)
 522
 523#define EXPECT_PTRER(cond, expr, expret, experr)			\
 524	EXPECT_PTRER2(cond, expr, expret, experr, 0)
 525
 526static __attribute__((unused))
 527int expect_ptrerr2(const void *expr, const void *expret, int experr1, int experr2, int llen)
 528{
 529	int ret = 0;
 530	int _errno = errno;
 531
 532	llen += printf(" = <%p> %s ", expr, errorname(_errno));
 533	if (expr != expret || (_errno != experr1 && _errno != experr2)) {
 534		ret = 1;
 535		if (experr2 == 0)
 536			llen += printf(" != (<%p> %s) ", expret, errorname(experr1));
 537		else
 538			llen += printf(" != (<%p> %s %s) ", expret, errorname(experr1), errorname(experr2));
 539		result(llen, FAIL);
 540	} else {
 541		result(llen, OK);
 542	}
 543	return ret;
 544}
 545
 546#define EXPECT_STRZR(cond, expr)				\
 547	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_strzr(expr, llen); } while (0)
 548
 549static __attribute__((unused))
 550int expect_strzr(const char *expr, int llen)
 551{
 552	int ret = 0;
 553
 554	llen += printf(" = <%s> ", expr ? expr : "(null)");
 555	if (expr) {
 556		ret = 1;
 557		result(llen, FAIL);
 558	} else {
 559		result(llen, OK);
 560	}
 561	return ret;
 562}
 563
 564
 565#define EXPECT_STRNZ(cond, expr)				\
 566	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_strnz(expr, llen); } while (0)
 567
 568static __attribute__((unused))
 569int expect_strnz(const char *expr, int llen)
 570{
 571	int ret = 0;
 572
 573	llen += printf(" = <%s> ", expr ? expr : "(null)");
 574	if (!expr) {
 575		ret = 1;
 576		result(llen, FAIL);
 577	} else {
 578		result(llen, OK);
 579	}
 580	return ret;
 581}
 582
 583
 584#define EXPECT_STREQ(cond, expr, cmp)				\
 585	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_streq(expr, llen, cmp); } while (0)
 586
 587static __attribute__((unused))
 588int expect_streq(const char *expr, int llen, const char *cmp)
 589{
 590	int ret = 0;
 591
 592	llen += printf(" = <%s> ", expr);
 593	if (strcmp(expr, cmp) != 0) {
 594		ret = 1;
 595		result(llen, FAIL);
 596	} else {
 597		result(llen, OK);
 598	}
 599	return ret;
 600}
 601
 602
 603#define EXPECT_STRNE(cond, expr, cmp)				\
 604	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_strne(expr, llen, cmp); } while (0)
 605
 606static __attribute__((unused))
 607int expect_strne(const char *expr, int llen, const char *cmp)
 608{
 609	int ret = 0;
 610
 611	llen += printf(" = <%s> ", expr);
 612	if (strcmp(expr, cmp) == 0) {
 613		ret = 1;
 614		result(llen, FAIL);
 615	} else {
 616		result(llen, OK);
 617	}
 618	return ret;
 619}
 620
 621#define EXPECT_STRBUFEQ(cond, expr, buf, val, cmp)				\
 622	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_str_buf_eq(expr, buf, val, llen, cmp); } while (0)
 623
 624static __attribute__((unused))
 625int expect_str_buf_eq(size_t expr, const char *buf, size_t val, int llen, const char *cmp)
 626{
 627	llen += printf(" = %lu <%s> ", (unsigned long)expr, buf);
 628	if (strcmp(buf, cmp) != 0) {
 629		result(llen, FAIL);
 630		return 1;
 631	}
 632	if (expr != val) {
 633		result(llen, FAIL);
 634		return 1;
 635	}
 636
 637	result(llen, OK);
 638	return 0;
 639}
 640
 641#define EXPECT_STRTOX(cond, func, input, base, expected, chars, expected_errno)				\
 642	do { if (!(cond)) result(llen, SKIPPED); else ret += expect_strtox(llen, func, input, base, expected, chars, expected_errno); } while (0)
 643
 644static __attribute__((unused))
 645int expect_strtox(int llen, void *func, const char *input, int base, intmax_t expected, int expected_chars, int expected_errno)
 646{
 647	char *endptr;
 648	int actual_errno, actual_chars;
 649	intmax_t r;
 650
 651	errno = 0;
 652	if (func == strtol) {
 653		r = strtol(input, &endptr, base);
 654	} else if (func == strtoul) {
 655		r = strtoul(input, &endptr, base);
 656	} else {
 657		result(llen, FAIL);
 658		return 1;
 659	}
 660	actual_errno = errno;
 661	actual_chars = endptr - input;
 662
 663	llen += printf(" %lld = %lld", (long long)expected, (long long)r);
 664	if (r != expected) {
 665		result(llen, FAIL);
 666		return 1;
 667	}
 668	if (expected_chars == -1) {
 669		if (*endptr != '\0') {
 670			result(llen, FAIL);
 671			return 1;
 672		}
 673	} else if (expected_chars != actual_chars) {
 674		result(llen, FAIL);
 675		return 1;
 676	}
 677	if (actual_errno != expected_errno) {
 678		result(llen, FAIL);
 679		return 1;
 680	}
 681
 682	result(llen, OK);
 683	return 0;
 684}
 685
 686/* declare tests based on line numbers. There must be exactly one test per line. */
 687#define CASE_TEST(name) \
 688	case __LINE__: llen += printf("%d %s", test, #name);
 689
 690__attribute__((constructor))
 691static void constructor1(void)
 692{
 693	constructor_test_value |= 1 << 0;
 694}
 695
 696__attribute__((constructor))
 697static void constructor2(int argc, char **argv, char **envp)
 698{
 699	if (argc && argv && envp)
 700		constructor_test_value |= 1 << 1;
 701}
 702
 703int run_startup(int min, int max)
 704{
 705	int test;
 706	int ret = 0;
 707	/* kernel at least passes HOME and TERM, shell passes more */
 708	int env_total = 2;
 709	/* checking NULL for argv/argv0, environ and _auxv is not enough, let's compare with sbrk(0) or &end */
 710	extern char end;
 711	char *brk = sbrk(0) != (void *)-1 ? sbrk(0) : &end;
 712	/* differ from nolibc, both glibc and musl have no global _auxv */
 713	const unsigned long *test_auxv = (void *)-1;
 714#ifdef NOLIBC
 715	test_auxv = _auxv;
 716#endif
 717
 718	for (test = min; test >= 0 && test <= max; test++) {
 719		int llen = 0; /* line length */
 720
 721		/* avoid leaving empty lines below, this will insert holes into
 722		 * test numbers.
 723		 */
 724		switch (test + __LINE__ + 1) {
 725		CASE_TEST(argc);             EXPECT_GE(1, test_argc, 1); break;
 726		CASE_TEST(argv_addr);        EXPECT_PTRGT(1, test_argv, brk); break;
 727		CASE_TEST(argv_environ);     EXPECT_PTRLT(1, test_argv, environ); break;
 728		CASE_TEST(argv_total);       EXPECT_EQ(1, environ - test_argv - 1, test_argc ?: 1); break;
 729		CASE_TEST(argv0_addr);       EXPECT_PTRGT(1, argv0, brk); break;
 730		CASE_TEST(argv0_str);        EXPECT_STRNZ(1, argv0 > brk ? argv0 : NULL); break;
 731		CASE_TEST(argv0_len);        EXPECT_GE(1,  argv0 > brk ? strlen(argv0) : 0, 1); break;
 732		CASE_TEST(environ_addr);     EXPECT_PTRGT(1, environ, brk); break;
 733		CASE_TEST(environ_envp);     EXPECT_PTREQ(1, environ, test_envp); break;
 734		CASE_TEST(environ_auxv);     EXPECT_PTRLT(test_auxv != (void *)-1, environ, test_auxv); break;
 735		CASE_TEST(environ_total);    EXPECT_GE(test_auxv != (void *)-1, (void *)test_auxv - (void *)environ - 1, env_total); break;
 736		CASE_TEST(environ_HOME);     EXPECT_PTRNZ(1, getenv("HOME")); break;
 737		CASE_TEST(auxv_addr);        EXPECT_PTRGT(test_auxv != (void *)-1, test_auxv, brk); break;
 738		CASE_TEST(auxv_AT_UID);      EXPECT_EQ(1, getauxval(AT_UID), getuid()); break;
 739		CASE_TEST(constructor);      EXPECT_EQ(is_nolibc, constructor_test_value, 0x3); break;
 740		CASE_TEST(linkage_errno);    EXPECT_PTREQ(1, linkage_test_errno_addr(), &errno); break;
 741		CASE_TEST(linkage_constr);   EXPECT_EQ(1, linkage_test_constructor_test_value, 0x3); break;
 742		case __LINE__:
 743			return ret; /* must be last */
 744		/* note: do not set any defaults so as to permit holes above */
 745		}
 746	}
 747	return ret;
 748}
 749
 750
 751/* used by some syscall tests below */
 752int test_getdents64(const char *dir)
 753{
 754	char buffer[4096];
 755	int fd, ret;
 756	int err;
 757
 758	ret = fd = open(dir, O_RDONLY | O_DIRECTORY, 0);
 759	if (ret < 0)
 760		return ret;
 761
 762	ret = getdents64(fd, (void *)buffer, sizeof(buffer));
 763	err = errno;
 764	close(fd);
 765
 766	errno = err;
 767	return ret;
 768}
 769
 770static int test_dirent(void)
 771{
 772	int comm = 0, cmdline = 0;
 773	struct dirent dirent, *result;
 774	DIR *dir;
 775	int ret;
 776
 777	dir = opendir("/proc/self");
 778	if (!dir)
 779		return 1;
 780
 781	while (1) {
 782		errno = 0;
 783		ret = readdir_r(dir, &dirent, &result);
 784		if (ret != 0)
 785			return 1;
 786		if (!result)
 787			break;
 788
 789		if (strcmp(dirent.d_name, "comm") == 0)
 790			comm++;
 791		else if (strcmp(dirent.d_name, "cmdline") == 0)
 792			cmdline++;
 793	}
 794
 795	if (errno)
 796		return 1;
 797
 798	ret = closedir(dir);
 799	if (ret)
 800		return 1;
 801
 802	if (comm != 1 || cmdline != 1)
 803		return 1;
 804
 805	return 0;
 806}
 807
 808int test_getrandom(void)
 809{
 810	uint64_t rng = 0;
 811	ssize_t ret;
 812
 813	ret = getrandom(&rng, sizeof(rng), GRND_NONBLOCK);
 814	if (ret == -1 && errno == EAGAIN)
 815		return 0; /* No entropy available yet */
 816
 817	if (ret != sizeof(rng))
 818		return ret;
 819
 820	if (!rng) {
 821		errno = EINVAL;
 822		return -1;
 823	}
 824
 825	return 0;
 826}
 827
 828int test_getpagesize(void)
 829{
 830	int x = getpagesize();
 831	int c;
 832
 833	if (x < 0)
 834		return x;
 835
 836#if defined(__x86_64__) || defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__)
 837	/*
 838	 * x86 family is always 4K page.
 839	 */
 840	c = (x == 4096);
 841#elif defined(__aarch64__)
 842	/*
 843	 * Linux aarch64 supports three values of page size: 4K, 16K, and 64K
 844	 * which are selected at kernel compilation time.
 845	 */
 846	c = (x == 4096 || x == (16 * 1024) || x == (64 * 1024));
 847#else
 848	/*
 849	 * Assuming other architectures must have at least 4K page.
 850	 */
 851	c = (x >= 4096);
 852#endif
 853
 854	return !c;
 855}
 856
 857int test_file_stream(void)
 858{
 859	FILE *f;
 860	int r;
 861
 862	f = fopen("/dev/null", "r");
 863	if (!f)
 864		return -1;
 865
 866	errno = 0;
 867	r = fwrite("foo", 1, 3, f);
 868	if (r != 0 || errno != EBADF) {
 869		fclose(f);
 870		return -1;
 871	}
 872
 873	r = fclose(f);
 874	if (r == EOF)
 875		return -1;
 876
 877	return 0;
 878}
 879
 880enum fork_type {
 881	FORK_STANDARD,
 882	FORK_VFORK,
 883};
 884
 885int test_fork(enum fork_type type)
 886{
 887	int status;
 888	pid_t pid;
 889
 890	/* flush the printf buffer to avoid child flush it */
 891	fflush(stdout);
 892	fflush(stderr);
 893
 894	switch (type) {
 895	case FORK_STANDARD:
 896		pid = fork();
 897		break;
 898	case FORK_VFORK:
 899		pid = vfork();
 900		break;
 901	default:
 902		return 1;
 903	}
 904
 905	switch (pid) {
 906	case -1:
 907		return 1;
 908
 909	case 0:
 910		_exit(123);
 911
 912	default:
 913		pid = waitpid(pid, &status, 0);
 914
 915		return pid == -1 || !WIFEXITED(status) || WEXITSTATUS(status) != 123;
 916	}
 917}
 918
 919int test_stat_timestamps(void)
 920{
 921	struct stat st;
 922
 923	if (sizeof(st.st_atim.tv_sec) != sizeof(st.st_atime))
 924		return 1;
 925
 926	if (stat("/proc/self/", &st) && stat(argv0, &st) && stat("/", &st))
 927		return 1;
 928
 929	if (st.st_atim.tv_sec != st.st_atime || st.st_atim.tv_nsec > 1000000000)
 930		return 1;
 931
 932	if (st.st_mtim.tv_sec != st.st_mtime || st.st_mtim.tv_nsec > 1000000000)
 933		return 1;
 934
 935	if (st.st_ctim.tv_sec != st.st_ctime || st.st_ctim.tv_nsec > 1000000000)
 936		return 1;
 937
 938	return 0;
 939}
 940
 941int test_timer(void)
 942{
 943	struct itimerspec timerspec;
 944	struct sigevent evp;
 945	timer_t timer;
 946	int ret;
 947
 948	evp.sigev_notify = SIGEV_NONE;
 949
 950	ret = timer_create(CLOCK_MONOTONIC, &evp, &timer);
 951	if (ret)
 952		return ret;
 953
 954	timerspec = (struct itimerspec) {
 955		.it_value.tv_sec = 1000000,
 956	};
 957	ret = timer_settime(timer, 0, &timerspec, NULL);
 958	if (ret)
 959		goto err;
 960
 961	timerspec = (struct itimerspec) {
 962		.it_value.tv_sec = -1,
 963		.it_value.tv_nsec = -1,
 964		.it_interval.tv_sec = -1,
 965		.it_interval.tv_nsec = -1,
 966	};
 967	ret = timer_gettime(timer, &timerspec);
 968	if (ret)
 969		goto err;
 970
 971	errno = EINVAL;
 972	ret = -1;
 973
 974	if (timerspec.it_interval.tv_sec || timerspec.it_interval.tv_nsec)
 975		goto err;
 976
 977	if (timerspec.it_value.tv_sec > 1000000)
 978		goto err;
 979
 980	ret = timer_delete(timer);
 981	if (ret)
 982		return ret;
 983
 984	return 0;
 985
 986err:
 987	timer_delete(timer);
 988	return ret;
 989}
 990
 991int test_timerfd(void)
 992{
 993	struct itimerspec timerspec;
 994	int timer, ret;
 995
 996	timer = timerfd_create(CLOCK_MONOTONIC, 0);
 997	if (timer == -1)
 998		return -1;
 999
1000	timerspec = (struct itimerspec) {
1001		.it_value.tv_sec = 1000000,
1002	};
1003	ret = timerfd_settime(timer, 0, &timerspec, NULL);
1004	if (ret)
1005		goto err;
1006
1007	timerspec = (struct itimerspec) {
1008		.it_value.tv_sec = -1,
1009		.it_value.tv_nsec = -1,
1010		.it_interval.tv_sec = -1,
1011		.it_interval.tv_nsec = -1,
1012	};
1013	ret = timerfd_gettime(timer, &timerspec);
1014	if (ret)
1015		goto err;
1016
1017	errno = EINVAL;
1018	ret = -1;
1019
1020	if (timerspec.it_interval.tv_sec || timerspec.it_interval.tv_nsec)
1021		goto err;
1022
1023	if (timerspec.it_value.tv_sec > 1000000)
1024		goto err;
1025
1026	ret = close(timer);
1027	if (ret)
1028		return ret;
1029
1030	return 0;
1031
1032err:
1033	close(timer);
1034	return ret;
1035}
1036
1037int test_uname(void)
1038{
1039	struct utsname buf;
1040	char osrelease[sizeof(buf.release)];
1041	ssize_t r;
1042	int fd;
1043
1044	memset(&buf.domainname, 'P', sizeof(buf.domainname));
1045
1046	if (uname(&buf))
1047		return 1;
1048
1049	if (strncmp("Linux", buf.sysname, sizeof(buf.sysname)))
1050		return 1;
1051
1052	fd = open("/proc/sys/kernel/osrelease", O_RDONLY);
1053	if (fd == -1)
1054		return 1;
1055
1056	r = read(fd, osrelease, sizeof(osrelease));
1057	if (r == -1)
1058		return 1;
1059
1060	close(fd);
1061
1062	if (osrelease[r - 1] == '\n')
1063		r--;
1064
1065	/* Validate one of the later fields to ensure field sizes are correct */
1066	if (strncmp(osrelease, buf.release, r))
1067		return 1;
1068
1069	/* Ensure the field domainname is set, it is missing from struct old_utsname */
1070	if (strnlen(buf.domainname, sizeof(buf.domainname)) == sizeof(buf.domainname))
1071		return 1;
1072
1073	return 0;
1074}
1075
1076int test_mmap_munmap(void)
1077{
1078	int ret, fd, i, page_size;
1079	void *mem;
1080	size_t file_size, length, mem_length;
1081	off_t offset, pa_offset;
1082	struct stat stat_buf;
1083	const char * const files[] = {
1084		"/dev/zero",
1085		"/proc/1/exe", "/proc/self/exe",
1086		argv0,
1087		NULL
1088	};
1089
1090	page_size = getpagesize();
1091	if (page_size < 0)
1092		return 1;
1093
1094	/* find a right file to mmap, existed and accessible */
1095	for (i = 0; files[i] != NULL; i++) {
1096		ret = fd = open(files[i], O_RDONLY);
1097		if (ret == -1)
1098			continue;
1099		else
1100			break;
1101	}
1102	if (ret == -1)
1103		return 1;
1104
1105	ret = stat(files[i], &stat_buf);
1106	if (ret == -1)
1107		goto end;
1108
1109	/* file size of the special /dev/zero is 0, let's assign one manually */
1110	if (i == 0)
1111		file_size = 3*page_size;
1112	else
1113		file_size = stat_buf.st_size;
1114
1115	offset = file_size - 1;
1116	if (offset < 0)
1117		offset = 0;
1118	length = file_size - offset;
1119	pa_offset = offset & ~(page_size - 1);
1120	mem_length = length + offset - pa_offset;
1121
1122	mem = mmap(NULL, mem_length, PROT_READ, MAP_SHARED, fd, pa_offset);
1123	if (mem == MAP_FAILED) {
1124		ret = 1;
1125		goto end;
1126	}
1127
1128	mem = mremap(mem, mem_length, mem_length * 2, MREMAP_MAYMOVE, 0);
1129	if (mem == MAP_FAILED) {
1130		munmap(mem, mem_length);
1131		ret = 1;
1132		goto end;
1133	}
1134
1135	ret = munmap(mem, mem_length * 2);
1136
1137end:
1138	close(fd);
1139	return !!ret;
1140}
1141
1142int test_pipe(void)
1143{
1144	const char *const msg = "hello, nolibc";
1145	int pipefd[2];
1146	char buf[32];
1147	size_t len;
1148
1149	if (pipe(pipefd) == -1)
1150		return 1;
1151
1152	write(pipefd[1], msg, strlen(msg));
1153	close(pipefd[1]);
1154	len = read(pipefd[0], buf, sizeof(buf));
1155	close(pipefd[0]);
1156
1157	if (len != strlen(msg))
1158		return 1;
1159
1160	return !!memcmp(buf, msg, len);
1161}
1162
1163int test_rlimit(void)
1164{
1165	struct rlimit rlim = {
1166		.rlim_cur = 1 << 20,
1167		.rlim_max = 1 << 21,
1168	};
1169	int ret;
1170
1171	ret = setrlimit(RLIMIT_CORE, &rlim);
1172	if (ret)
1173		return -1;
1174
1175	rlim.rlim_cur = 0;
1176	rlim.rlim_max = 0;
1177
1178	ret = getrlimit(RLIMIT_CORE, &rlim);
1179	if (ret)
1180		return -1;
1181
1182	if (rlim.rlim_cur != 1 << 20)
1183		return -1;
1184	if (rlim.rlim_max != 1 << 21)
1185		return -1;
1186
1187	return 0;
1188}
1189
1190int test_openat(void)
1191{
1192	int dev, null;
1193
1194	dev = openat(AT_FDCWD, "/dev", O_DIRECTORY);
1195	if (dev < 0)
1196		return -1;
1197
1198	null = openat(dev, "null", O_RDONLY);
1199	close(dev);
1200	if (null < 0)
1201		return -1;
1202
1203	close(null);
1204	return 0;
1205}
1206
1207int test_namespace(void)
1208{
1209	int original_ns, new_ns, ret;
1210	ino_t original_ns_ino;
1211	struct stat stat_buf;
1212
1213	original_ns = open("/proc/self/ns/uts", O_RDONLY);
1214	if (original_ns == -1)
1215		return -1;
1216
1217	ret = fstat(original_ns, &stat_buf);
1218	if (ret)
1219		goto out;
1220
1221	original_ns_ino = stat_buf.st_ino;
1222
1223	ret = unshare(CLONE_NEWUTS);
1224	if (ret)
1225		goto out;
1226
1227	new_ns = open("/proc/self/ns/uts", O_RDONLY);
1228	if (new_ns == -1) {
1229		ret = new_ns;
1230		goto out;
1231	}
1232
1233	ret = fstat(new_ns, &stat_buf);
1234	close(new_ns);
1235	if (ret)
1236		goto out;
1237
1238	if (stat_buf.st_ino == original_ns_ino) {
1239		errno = EINVAL;
1240		ret = -1;
1241		goto out;
1242	}
1243
1244	ret = setns(original_ns, CLONE_NEWUTS);
1245	if (ret)
1246		goto out;
1247
1248	new_ns = open("/proc/self/ns/uts", O_RDONLY);
1249	if (new_ns == -1) {
1250		ret = new_ns;
1251		goto out;
1252	}
1253
1254	ret = fstat(new_ns, &stat_buf);
1255	if (ret)
1256		goto out;
1257
1258	close(new_ns);
1259
1260	if (stat_buf.st_ino != original_ns_ino) {
1261		errno = EINVAL;
1262		ret = -1;
1263		goto out;
1264	}
1265
1266	ret = 0;
1267
1268out:
1269	close(original_ns);
1270	return ret;
1271}
1272
1273/* Run syscall tests between IDs <min> and <max>.
1274 * Return 0 on success, non-zero on failure.
1275 */
1276int run_syscall(int min, int max)
1277{
1278	struct timeval tv;
1279	struct timezone tz;
1280	struct timespec ts;
1281	struct stat stat_buf;
1282	int euid0;
1283	int proc;
1284	int test;
1285	int tmp;
1286	struct iovec iov_one = {
1287		.iov_base = &tmp,
1288		.iov_len = 1,
1289	};
1290	int ret = 0;
1291	void *p1, *p2;
1292	int has_gettid = 1;
1293	int has_brk;
1294
1295	/* <proc> indicates whether or not /proc is mounted */
1296	proc = stat("/proc", &stat_buf) == 0;
1297
1298	/* this will be used to skip certain tests that can't be run unprivileged */
1299	euid0 = geteuid() == 0;
1300
1301	/* from 2.30, glibc provides gettid() */
1302#if defined(__GLIBC_MINOR__) && defined(__GLIBC__)
1303	has_gettid = __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 30);
1304#endif
1305
1306	/* on musl setting brk()/sbrk() always fails */
1307	has_brk = brk(0) == 0;
1308
1309	for (test = min; test >= 0 && test <= max; test++) {
1310		int llen = 0; /* line length */
1311
1312		/* avoid leaving empty lines below, this will insert holes into
1313		 * test numbers.
1314		 */
1315		switch (test + __LINE__ + 1) {
1316		CASE_TEST(access);            EXPECT_SYSZR(proc, access("/proc/self", R_OK)); break;
1317		CASE_TEST(access_bad);        EXPECT_SYSER(proc, access("/proc/self", W_OK), -1, EPERM); break;
1318		CASE_TEST(clock_getres);      EXPECT_SYSZR(1, clock_getres(CLOCK_MONOTONIC, &ts)); break;
1319		CASE_TEST(clock_gettime);     EXPECT_SYSZR(1, clock_gettime(CLOCK_MONOTONIC, &ts)); break;
1320		CASE_TEST(clock_settime);     EXPECT_SYSER(1, clock_settime(CLOCK_MONOTONIC, &ts), -1, EINVAL); break;
1321		CASE_TEST(getpid);            EXPECT_SYSNE(1, getpid(), -1); break;
1322		CASE_TEST(getppid);           EXPECT_SYSNE(1, getppid(), -1); break;
1323		CASE_TEST(gettid);            EXPECT_SYSNE(has_gettid, gettid(), -1); break;
1324		CASE_TEST(getpgid_self);      EXPECT_SYSNE(1, getpgid(0), -1); break;
1325		CASE_TEST(getpgid_bad);       EXPECT_SYSER(1, getpgid(-1), -1, ESRCH); break;
1326		CASE_TEST(kill_0);            EXPECT_SYSZR(1, kill(getpid(), 0)); break;
1327		CASE_TEST(kill_CONT);         EXPECT_SYSZR(1, kill(getpid(), 0)); break;
1328		CASE_TEST(kill_BADPID);       EXPECT_SYSER(1, kill(INT_MAX, 0), -1, ESRCH); break;
1329		CASE_TEST(sbrk_0);            EXPECT_PTRNE(has_brk, sbrk(0), (void *)-1); break;
1330		CASE_TEST(sbrk);              if ((p1 = p2 = sbrk(4096)) != (void *)-1) p2 = sbrk(-4096); EXPECT_SYSZR(has_brk, (p2 == (void *)-1) || p2 == p1); break;
1331		CASE_TEST(brk);               EXPECT_SYSZR(has_brk, brk(sbrk(0))); break;
1332		CASE_TEST(chdir_root);        EXPECT_SYSZR(1, chdir("/")); chdir(getenv("PWD")); break;
1333		CASE_TEST(chdir_dot);         EXPECT_SYSZR(1, chdir(".")); break;
1334		CASE_TEST(chdir_blah);        EXPECT_SYSER(1, chdir("/blah"), -1, ENOENT); break;
1335		CASE_TEST(chmod_argv0);       EXPECT_SYSZR(1, chmod(argv0, 0555)); break;
1336		CASE_TEST(chmod_self);        EXPECT_SYSER(proc, chmod("/proc/self", 0555), -1, EPERM); break;
1337		CASE_TEST(chown_self);        EXPECT_SYSER(proc, chown("/proc/self", 0, 0), -1, EPERM); break;
1338		CASE_TEST(chroot_root);       EXPECT_SYSZR(euid0, chroot("/")); break;
1339		CASE_TEST(chroot_blah);       EXPECT_SYSER(1, chroot("/proc/self/blah"), -1, ENOENT); break;
1340		CASE_TEST(chroot_exe);        EXPECT_SYSER(1, chroot(argv0), -1, ENOTDIR); break;
1341		CASE_TEST(clock_nanosleep);   ts.tv_nsec = -1; EXPECT_EQ(1, EINVAL, clock_nanosleep(CLOCK_REALTIME, 0, &ts, NULL)); break;
1342		CASE_TEST(close_m1);          EXPECT_SYSER(1, close(-1), -1, EBADF); break;
1343		CASE_TEST(close_dup);         EXPECT_SYSZR(1, close(dup(0))); break;
1344		CASE_TEST(dup_0);             tmp = dup(0);  EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
1345		CASE_TEST(dup_m1);            tmp = dup(-1); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
1346		CASE_TEST(dup2_0);            tmp = dup2(0, 100);  EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
1347		CASE_TEST(dup2_m1);           tmp = dup2(-1, 100); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
1348		CASE_TEST(dup3_0);            tmp = dup3(0, 100, 0);  EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
1349		CASE_TEST(dup3_m1);           tmp = dup3(-1, 100, 0); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
1350		CASE_TEST(execve_root);       EXPECT_SYSER(1, execve("/", (char*[]){ [0] = "/", [1] = NULL }, NULL), -1, EACCES); break;
1351		CASE_TEST(fchdir_stdin);      EXPECT_SYSER(1, fchdir(STDIN_FILENO), -1, ENOTDIR); break;
1352		CASE_TEST(fchdir_badfd);      EXPECT_SYSER(1, fchdir(-1), -1, EBADF); break;
1353		CASE_TEST(file_stream);       EXPECT_SYSZR(1, test_file_stream()); break;
1354		CASE_TEST(fork);              EXPECT_SYSZR(1, test_fork(FORK_STANDARD)); break;
1355		CASE_TEST(getdents64_root);   EXPECT_SYSNE(1, test_getdents64("/"), -1); break;
1356		CASE_TEST(getdents64_null);   EXPECT_SYSER(1, test_getdents64("/dev/null"), -1, ENOTDIR); break;
1357		CASE_TEST(directories);       EXPECT_SYSZR(proc, test_dirent()); break;
1358		CASE_TEST(getrandom);         EXPECT_SYSZR(1, test_getrandom()); break;
1359		CASE_TEST(gettimeofday_tv);   EXPECT_SYSZR(1, gettimeofday(&tv, NULL)); break;
1360		CASE_TEST(gettimeofday_tv_tz);EXPECT_SYSZR(1, gettimeofday(&tv, &tz)); break;
1361		CASE_TEST(getpagesize);       EXPECT_SYSZR(1, test_getpagesize()); break;
1362		CASE_TEST(ioctl_tiocinq);     EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break;
1363		CASE_TEST(link_root1);        EXPECT_SYSER(1, link("/", "/"), -1, EEXIST); break;
1364		CASE_TEST(link_blah);         EXPECT_SYSER(1, link("/proc/self/blah", "/blah"), -1, ENOENT); break;
1365		CASE_TEST(link_dir);          EXPECT_SYSER(euid0, link("/", "/blah"), -1, EPERM); break;
1366		CASE_TEST(link_cross);        EXPECT_SYSER(proc, link("/proc/self/cmdline", "/blah"), -1, EXDEV); break;
1367		CASE_TEST(lseek_m1);          EXPECT_SYSER(1, lseek(-1, 0, SEEK_SET), -1, EBADF); break;
1368		CASE_TEST(lseek_0);           EXPECT_SYSER(1, lseek(0, 0, SEEK_SET), -1, ESPIPE); break;
1369		CASE_TEST(mkdir_root);        EXPECT_SYSER(1, mkdir("/", 0755), -1, EEXIST); break;
1370		CASE_TEST(mmap_bad);          EXPECT_PTRER(1, mmap(NULL, 0, PROT_READ, MAP_PRIVATE, 0, 0), MAP_FAILED, EINVAL); break;
1371		CASE_TEST(munmap_bad);        EXPECT_SYSER(1, munmap(NULL, 0), -1, EINVAL); break;
1372		CASE_TEST(mmap_munmap_good);  EXPECT_SYSZR(1, test_mmap_munmap()); break;
1373		CASE_TEST(nanosleep);         ts.tv_nsec = -1; EXPECT_SYSER(1, nanosleep(&ts, NULL), -1, EINVAL); break;
1374		CASE_TEST(open_tty);          EXPECT_SYSNE(1, tmp = open("/dev/null", O_RDONLY), -1); if (tmp != -1) close(tmp); break;
1375		CASE_TEST(open_blah);         EXPECT_SYSER(1, tmp = open("/proc/self/blah", O_RDONLY), -1, ENOENT); if (tmp != -1) close(tmp); break;
1376		CASE_TEST(openat_dir);        EXPECT_SYSZR(1, test_openat()); break;
1377		CASE_TEST(pipe);              EXPECT_SYSZR(1, test_pipe()); break;
1378		CASE_TEST(poll_null);         EXPECT_SYSZR(1, poll(NULL, 0, 0)); break;
1379		CASE_TEST(poll_stdout);       EXPECT_SYSNE(1, ({ struct pollfd fds = { 1, POLLOUT, 0}; poll(&fds, 1, 0); }), -1); break;
1380		CASE_TEST(poll_fault);        EXPECT_SYSER(1, poll(NULL, 1, 0), -1, EFAULT); break;
1381		CASE_TEST(prctl);             EXPECT_SYSER(1, prctl(PR_SET_NAME, (unsigned long)NULL, 0, 0, 0), -1, EFAULT); break;
1382		CASE_TEST(read_badf);         EXPECT_SYSER(1, read(-1, &tmp, 1), -1, EBADF); break;
1383		CASE_TEST(rlimit);            EXPECT_SYSZR(1, test_rlimit()); break;
1384		CASE_TEST(rmdir_blah);        EXPECT_SYSER(1, rmdir("/blah"), -1, ENOENT); break;
1385		CASE_TEST(sched_yield);       EXPECT_SYSZR(1, sched_yield()); break;
1386		CASE_TEST(select_null);       EXPECT_SYSZR(1, ({ struct timeval tv = { 0 }; select(0, NULL, NULL, NULL, &tv); })); break;
1387		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;
1388		CASE_TEST(select_fault);      EXPECT_SYSER(1, select(1, (void *)1, NULL, NULL, 0), -1, EFAULT); break;
1389		CASE_TEST(stat_blah);         EXPECT_SYSER(1, stat("/proc/self/blah", &stat_buf), -1, ENOENT); break;
1390		CASE_TEST(stat_fault);        EXPECT_SYSER(1, stat(NULL, &stat_buf), -1, EFAULT); break;
1391		CASE_TEST(stat_timestamps);   EXPECT_SYSZR(1, test_stat_timestamps()); break;
1392		CASE_TEST(symlink_root);      EXPECT_SYSER(1, symlink("/", "/"), -1, EEXIST); break;
1393		CASE_TEST(timer);             EXPECT_SYSZR(1, test_timer()); break;
1394		CASE_TEST(timerfd);           EXPECT_SYSZR(1, test_timerfd()); break;
1395		CASE_TEST(uname);             EXPECT_SYSZR(proc, test_uname()); break;
1396		CASE_TEST(uname_fault);       EXPECT_SYSER(1, uname(NULL), -1, EFAULT); break;
1397		CASE_TEST(unlink_root);       EXPECT_SYSER(1, unlink("/"), -1, EISDIR); break;
1398		CASE_TEST(unlink_blah);       EXPECT_SYSER(1, unlink("/proc/self/blah"), -1, ENOENT); break;
1399		CASE_TEST(vfork);             EXPECT_SYSZR(1, test_fork(FORK_VFORK)); break;
1400		CASE_TEST(wait_child);        EXPECT_SYSER(1, wait(&tmp), -1, ECHILD); break;
1401		CASE_TEST(waitpid_min);       EXPECT_SYSER(1, waitpid(INT_MIN, &tmp, WNOHANG), -1, ESRCH); break;
1402		CASE_TEST(waitpid_child);     EXPECT_SYSER(1, waitpid(getpid(), &tmp, WNOHANG), -1, ECHILD); break;
1403		CASE_TEST(write_badf);        EXPECT_SYSER(1, write(-1, &tmp, 1), -1, EBADF); break;
1404		CASE_TEST(write_zero);        EXPECT_SYSZR(1, write(1, &tmp, 0)); break;
1405		CASE_TEST(readv_badf);        EXPECT_SYSER(1, readv(-1, &iov_one, 1), -1, EBADF); break;
1406		CASE_TEST(readv_zero);        EXPECT_SYSZR(1, readv(1, NULL, 0)); break;
1407		CASE_TEST(writev_badf);       EXPECT_SYSER(1, writev(-1, &iov_one, 1), -1, EBADF); break;
1408		CASE_TEST(writev_zero);       EXPECT_SYSZR(1, writev(1, NULL, 0)); break;
1409		CASE_TEST(syscall_noargs);    EXPECT_SYSEQ(1, syscall(__NR_getpid), getpid()); break;
1410		CASE_TEST(syscall_args);      EXPECT_SYSER(1, syscall(__NR_statx, 0, NULL, 0, 0, NULL), -1, EFAULT); break;
1411		CASE_TEST(namespace);         EXPECT_SYSZR(euid0 && proc, test_namespace()); break;
1412		case __LINE__:
1413			return ret; /* must be last */
1414		/* note: do not set any defaults so as to permit holes above */
1415		}
1416	}
1417	return ret;
1418}
1419
1420int test_difftime(void)
1421{
1422	if (difftime(200., 100.) != 100.)
1423		return 1;
1424
1425	if (difftime(100., 200.) != -100.)
1426		return 1;
1427
1428	return 0;
1429}
1430
1431int run_stdlib(int min, int max)
1432{
1433	int test;
1434	int ret = 0;
1435
1436	for (test = min; test >= 0 && test <= max; test++) {
1437		int llen = 0; /* line length */
1438
1439		/* For functions that take a long buffer, like strlcat()
1440		 * Add some more chars after the \0, to test functions that overwrite the buffer set
1441		 * the \0 at the exact right position.
1442		 */
1443		char buf[11] = "test123456";
1444		buf[4] = '\0';
1445
1446
1447		/* avoid leaving empty lines below, this will insert holes into
1448		 * test numbers.
1449		 */
1450		switch (test + __LINE__ + 1) {
1451		CASE_TEST(getenv_TERM);        EXPECT_STRNZ(1, getenv("TERM")); break;
1452		CASE_TEST(getenv_blah);        EXPECT_STRZR(1, getenv("blah")); break;
1453		CASE_TEST(setcmp_blah_blah);   EXPECT_EQ(1, strcmp("blah", "blah"), 0); break;
1454		CASE_TEST(setcmp_blah_blah2);  EXPECT_NE(1, strcmp("blah", "blah2"), 0); break;
1455		CASE_TEST(setncmp_blah_blah);  EXPECT_EQ(1, strncmp("blah", "blah", 10), 0); break;
1456		CASE_TEST(setncmp_blah_blah4); EXPECT_EQ(1, strncmp("blah", "blah4", 4), 0); break;
1457		CASE_TEST(setncmp_blah_blah5); EXPECT_NE(1, strncmp("blah", "blah5", 5), 0); break;
1458		CASE_TEST(setncmp_blah_blah6); EXPECT_NE(1, strncmp("blah", "blah6", 6), 0); break;
1459		CASE_TEST(strchr_foobar_o);    EXPECT_STREQ(1, strchr("foobar", 'o'), "oobar"); break;
1460		CASE_TEST(strchr_foobar_z);    EXPECT_STRZR(1, strchr("foobar", 'z')); break;
1461		CASE_TEST(strrchr_foobar_o);   EXPECT_STREQ(1, strrchr("foobar", 'o'), "obar"); break;
1462		CASE_TEST(strrchr_foobar_z);   EXPECT_STRZR(1, strrchr("foobar", 'z')); break;
1463		CASE_TEST(strlcat_0);          EXPECT_STRBUFEQ(is_nolibc, strlcat(buf, "bar", 0), buf, 3, "test"); break;
1464		CASE_TEST(strlcat_1);          EXPECT_STRBUFEQ(is_nolibc, strlcat(buf, "bar", 1), buf, 4, "test"); break;
1465		CASE_TEST(strlcat_5);          EXPECT_STRBUFEQ(is_nolibc, strlcat(buf, "bar", 5), buf, 7, "test"); break;
1466		CASE_TEST(strlcat_6);          EXPECT_STRBUFEQ(is_nolibc, strlcat(buf, "bar", 6), buf, 7, "testb"); break;
1467		CASE_TEST(strlcat_7);          EXPECT_STRBUFEQ(is_nolibc, strlcat(buf, "bar", 7), buf, 7, "testba"); break;
1468		CASE_TEST(strlcat_8);          EXPECT_STRBUFEQ(is_nolibc, strlcat(buf, "bar", 8), buf, 7, "testbar"); break;
1469		CASE_TEST(strlcpy_0);          EXPECT_STRBUFEQ(is_nolibc, strlcpy(buf, "bar", 0), buf, 3, "test"); break;
1470		CASE_TEST(strlcpy_1);          EXPECT_STRBUFEQ(is_nolibc, strlcpy(buf, "bar", 1), buf, 3, ""); break;
1471		CASE_TEST(strlcpy_2);          EXPECT_STRBUFEQ(is_nolibc, strlcpy(buf, "bar", 2), buf, 3, "b"); break;
1472		CASE_TEST(strlcpy_3);          EXPECT_STRBUFEQ(is_nolibc, strlcpy(buf, "bar", 3), buf, 3, "ba"); break;
1473		CASE_TEST(strlcpy_4);          EXPECT_STRBUFEQ(is_nolibc, strlcpy(buf, "bar", 4), buf, 3, "bar"); break;
1474		CASE_TEST(strstr_foobar_foo);  EXPECT_STREQ(1, strstr("foobar", "foo"), "foobar"); break;
1475		CASE_TEST(strstr_foobar_bar);  EXPECT_STREQ(1, strstr("foobar", "bar"), "bar"); break;
1476		CASE_TEST(strstr_foobar_baz);  EXPECT_PTREQ(1, strstr("foobar", "baz"), NULL); break;
1477		CASE_TEST(memcmp_20_20);       EXPECT_EQ(1, memcmp("aaa\x20", "aaa\x20", 4), 0); break;
1478		CASE_TEST(memcmp_20_60);       EXPECT_LT(1, memcmp("aaa\x20", "aaa\x60", 4), 0); break;
1479		CASE_TEST(memcmp_60_20);       EXPECT_GT(1, memcmp("aaa\x60", "aaa\x20", 4), 0); break;
1480		CASE_TEST(memcmp_20_e0);       EXPECT_LT(1, memcmp("aaa\x20", "aaa\xe0", 4), 0); break;
1481		CASE_TEST(memcmp_e0_20);       EXPECT_GT(1, memcmp("aaa\xe0", "aaa\x20", 4), 0); break;
1482		CASE_TEST(memcmp_80_e0);       EXPECT_LT(1, memcmp("aaa\x80", "aaa\xe0", 4), 0); break;
1483		CASE_TEST(memcmp_e0_80);       EXPECT_GT(1, memcmp("aaa\xe0", "aaa\x80", 4), 0); break;
1484		CASE_TEST(limit_int8_max);          EXPECT_EQ(1, INT8_MAX,         (int8_t)          0x7f); break;
1485		CASE_TEST(limit_int8_min);          EXPECT_EQ(1, INT8_MIN,         (int8_t)          0x80); break;
1486		CASE_TEST(limit_uint8_max);         EXPECT_EQ(1, UINT8_MAX,        (uint8_t)         0xff); break;
1487		CASE_TEST(limit_int16_max);         EXPECT_EQ(1, INT16_MAX,        (int16_t)         0x7fff); break;
1488		CASE_TEST(limit_int16_min);         EXPECT_EQ(1, INT16_MIN,        (int16_t)         0x8000); break;
1489		CASE_TEST(limit_uint16_max);        EXPECT_EQ(1, UINT16_MAX,       (uint16_t)        0xffff); break;
1490		CASE_TEST(limit_int32_max);         EXPECT_EQ(1, INT32_MAX,        (int32_t)         0x7fffffff); break;
1491		CASE_TEST(limit_int32_min);         EXPECT_EQ(1, INT32_MIN,        (int32_t)         0x80000000); break;
1492		CASE_TEST(limit_uint32_max);        EXPECT_EQ(1, UINT32_MAX,       (uint32_t)        0xffffffff); break;
1493		CASE_TEST(limit_int64_max);         EXPECT_EQ(1, INT64_MAX,        (int64_t)         0x7fffffffffffffff); break;
1494		CASE_TEST(limit_int64_min);         EXPECT_EQ(1, INT64_MIN,        (int64_t)         0x8000000000000000); break;
1495		CASE_TEST(limit_uint64_max);        EXPECT_EQ(1, UINT64_MAX,       (uint64_t)        0xffffffffffffffff); break;
1496		CASE_TEST(limit_int_least8_max);    EXPECT_EQ(1, INT_LEAST8_MAX,   (int_least8_t)    0x7f); break;
1497		CASE_TEST(limit_int_least8_min);    EXPECT_EQ(1, INT_LEAST8_MIN,   (int_least8_t)    0x80); break;
1498		CASE_TEST(limit_uint_least8_max);   EXPECT_EQ(1, UINT_LEAST8_MAX,  (uint_least8_t)   0xff); break;
1499		CASE_TEST(limit_int_least16_max);   EXPECT_EQ(1, INT_LEAST16_MAX,  (int_least16_t)   0x7fff); break;
1500		CASE_TEST(limit_int_least16_min);   EXPECT_EQ(1, INT_LEAST16_MIN,  (int_least16_t)   0x8000); break;
1501		CASE_TEST(limit_uint_least16_max);  EXPECT_EQ(1, UINT_LEAST16_MAX, (uint_least16_t)  0xffff); break;
1502		CASE_TEST(limit_int_least32_max);   EXPECT_EQ(1, INT_LEAST32_MAX,  (int_least32_t)   0x7fffffff); break;
1503		CASE_TEST(limit_int_least32_min);   EXPECT_EQ(1, INT_LEAST32_MIN,  (int_least32_t)   0x80000000); break;
1504		CASE_TEST(limit_uint_least32_max);  EXPECT_EQ(1, UINT_LEAST32_MAX, (uint_least32_t)  0xffffffffU); break;
1505		CASE_TEST(limit_int_least64_min);   EXPECT_EQ(1, INT_LEAST64_MIN,  (int_least64_t)   0x8000000000000000LL); break;
1506		CASE_TEST(limit_int_least64_max);   EXPECT_EQ(1, INT_LEAST64_MAX,  (int_least64_t)   0x7fffffffffffffffLL); break;
1507		CASE_TEST(limit_uint_least64_max);  EXPECT_EQ(1, UINT_LEAST64_MAX, (uint_least64_t)  0xffffffffffffffffULL); break;
1508		CASE_TEST(limit_int_fast8_max);     EXPECT_EQ(1, INT_FAST8_MAX,    (int_fast8_t)     0x7f); break;
1509		CASE_TEST(limit_int_fast8_min);     EXPECT_EQ(1, INT_FAST8_MIN,    (int_fast8_t)     0x80); break;
1510		CASE_TEST(limit_uint_fast8_max);    EXPECT_EQ(1, UINT_FAST8_MAX,   (uint_fast8_t)    0xff); break;
1511		CASE_TEST(limit_int_fast16_min);    EXPECT_EQ(1, INT_FAST16_MIN,   (int_fast16_t)    SINT_MIN_OF_TYPE(int_fast16_t)); break;
1512		CASE_TEST(limit_int_fast16_max);    EXPECT_EQ(1, INT_FAST16_MAX,   (int_fast16_t)    SINT_MAX_OF_TYPE(int_fast16_t)); break;
1513		CASE_TEST(limit_uint_fast16_max);   EXPECT_EQ(1, UINT_FAST16_MAX,  (uint_fast16_t)   UINTPTR_MAX); break;
1514		CASE_TEST(limit_int_fast32_min);    EXPECT_EQ(1, INT_FAST32_MIN,   (int_fast32_t)    SINT_MIN_OF_TYPE(int_fast32_t)); break;
1515		CASE_TEST(limit_int_fast32_max);    EXPECT_EQ(1, INT_FAST32_MAX,   (int_fast32_t)    SINT_MAX_OF_TYPE(int_fast32_t)); break;
1516		CASE_TEST(limit_uint_fast32_max);   EXPECT_EQ(1, UINT_FAST32_MAX,  (uint_fast32_t)   UINTPTR_MAX); break;
1517		CASE_TEST(limit_int_fast64_min);    EXPECT_EQ(1, INT_FAST64_MIN,   (int_fast64_t)    INT64_MIN); break;
1518		CASE_TEST(limit_int_fast64_max);    EXPECT_EQ(1, INT_FAST64_MAX,   (int_fast64_t)    INT64_MAX); break;
1519		CASE_TEST(limit_uint_fast64_max);   EXPECT_EQ(1, UINT_FAST64_MAX,  (uint_fast64_t)   UINT64_MAX); break;
1520		CASE_TEST(sizeof_long_sane);        EXPECT_EQ(1, sizeof(long) == 8 || sizeof(long) == 4, 1); break;
1521		CASE_TEST(limit_intptr_min);        EXPECT_EQ(1, INTPTR_MIN,  sizeof(long) == 8 ? (intptr_t)  0x8000000000000000LL  : (intptr_t)  0x80000000); break;
1522		CASE_TEST(limit_intptr_max);        EXPECT_EQ(1, INTPTR_MAX,  sizeof(long) == 8 ? (intptr_t)  0x7fffffffffffffffLL  : (intptr_t)  0x7fffffff); break;
1523		CASE_TEST(limit_uintptr_max);       EXPECT_EQ(1, UINTPTR_MAX, sizeof(long) == 8 ? (uintptr_t) 0xffffffffffffffffULL : (uintptr_t) 0xffffffffU); break;
1524		CASE_TEST(limit_ptrdiff_min);       EXPECT_EQ(1, PTRDIFF_MIN, sizeof(long) == 8 ? (ptrdiff_t) 0x8000000000000000LL  : (ptrdiff_t) 0x80000000); break;
1525		CASE_TEST(limit_ptrdiff_max);       EXPECT_EQ(1, PTRDIFF_MAX, sizeof(long) == 8 ? (ptrdiff_t) 0x7fffffffffffffffLL  : (ptrdiff_t) 0x7fffffff); break;
1526		CASE_TEST(limit_size_max);          EXPECT_EQ(1, SIZE_MAX,    sizeof(long) == 8 ? (size_t)    0xffffffffffffffffULL : (size_t)    0xffffffffU); break;
1527		CASE_TEST(strtol_simple);           EXPECT_STRTOX(1, strtol, "35", 10, 35, -1, 0); break;
1528		CASE_TEST(strtol_positive);         EXPECT_STRTOX(1, strtol, "+35", 10, 35, -1, 0); break;
1529		CASE_TEST(strtol_negative);         EXPECT_STRTOX(1, strtol, "-35", 10, -35, -1, 0); break;
1530		CASE_TEST(strtol_hex_auto);         EXPECT_STRTOX(1, strtol, "0xFF", 0, 255, -1, 0); break;
1531		CASE_TEST(strtol_base36);           EXPECT_STRTOX(1, strtol, "12yZ", 36, 50507, -1, 0); break;
1532		CASE_TEST(strtol_cutoff);           EXPECT_STRTOX(1, strtol, "1234567890", 8, 342391, 7, 0); break;
1533		CASE_TEST(strtol_octal_auto);       EXPECT_STRTOX(1, strtol, "011", 0, 9, -1, 0); break;
1534		CASE_TEST(strtol_hex_00);           EXPECT_STRTOX(1, strtol, "0x00", 16, 0, -1, 0); break;
1535		CASE_TEST(strtol_hex_FF);           EXPECT_STRTOX(1, strtol, "FF", 16, 255, -1, 0); break;
1536		CASE_TEST(strtol_hex_ff);           EXPECT_STRTOX(1, strtol, "ff", 16, 255, -1, 0); break;
1537		CASE_TEST(strtol_hex_prefix);       EXPECT_STRTOX(1, strtol, "0xFF", 16, 255, -1, 0); break;
1538		CASE_TEST(strtol_trailer);          EXPECT_STRTOX(1, strtol, "35foo", 10, 35, 2, 0); break;
1539		CASE_TEST(strtol_overflow);         EXPECT_STRTOX(1, strtol, "0x8000000000000000", 16, LONG_MAX, -1, ERANGE); break;
1540		CASE_TEST(strtol_underflow);        EXPECT_STRTOX(1, strtol, "-0x8000000000000001", 16, LONG_MIN, -1, ERANGE); break;
1541		CASE_TEST(strtoul_negative);        EXPECT_STRTOX(1, strtoul, "-0x1", 16, ULONG_MAX, 4, 0); break;
1542		CASE_TEST(strtoul_overflow);        EXPECT_STRTOX(1, strtoul, "0x10000000000000000", 16, ULONG_MAX, -1, ERANGE); break;
1543		CASE_TEST(strerror_success);        EXPECT_STREQ(is_nolibc, strerror(0), "errno=0"); break;
1544		CASE_TEST(strerror_EINVAL);         EXPECT_STREQ(is_nolibc, strerror(EINVAL), "errno=22"); break;
1545		CASE_TEST(strerror_int_max);        EXPECT_STREQ(is_nolibc, strerror(INT_MAX), "errno=2147483647"); break;
1546		CASE_TEST(strerror_int_min);        EXPECT_STREQ(is_nolibc, strerror(INT_MIN), "errno=-2147483648"); break;
1547		CASE_TEST(tolower);                 EXPECT_EQ(1, tolower('A'), 'a'); break;
1548		CASE_TEST(tolower_noop);            EXPECT_EQ(1, tolower('a'), 'a'); break;
1549		CASE_TEST(toupper);                 EXPECT_EQ(1, toupper('a'), 'A'); break;
1550		CASE_TEST(toupper_noop);            EXPECT_EQ(1, toupper('A'), 'A'); break;
1551		CASE_TEST(abs);                     EXPECT_EQ(1, abs(-10), 10); break;
1552		CASE_TEST(abs_noop);                EXPECT_EQ(1, abs(10), 10); break;
1553		CASE_TEST(difftime);                EXPECT_ZR(1, test_difftime()); break;
1554		CASE_TEST(memchr_foobar6_o);        EXPECT_STREQ(1, memchr("foobar", 'o', 6), "oobar"); break;
1555		CASE_TEST(memchr_foobar3_b);        EXPECT_STRZR(1, memchr("foobar", 'b', 3)); break;
1556
1557		case __LINE__:
1558			return ret; /* must be last */
1559		/* note: do not set any defaults so as to permit holes above */
1560		}
1561	}
1562	return ret;
1563}
1564
1565#define EXPECT_VFPRINTF(c, expected, fmt, ...)				\
1566	ret += expect_vfprintf(llen, c, expected, fmt, ##__VA_ARGS__)
1567
1568static int expect_vfprintf(int llen, int c, const char *expected, const char *fmt, ...)
1569{
1570	char buf[100];
1571	va_list args;
1572	ssize_t w;
1573	int ret;
1574
1575
1576	va_start(args, fmt);
1577	/* Only allow writing 21 bytes, to test truncation */
1578	w = vsnprintf(buf, 21, fmt, args);
1579	va_end(args);
1580
1581	if (w != c) {
1582		llen += printf(" written(%d) != %d", (int)w, c);
1583		result(llen, FAIL);
1584		return 1;
1585	}
1586
1587	llen += printf(" \"%s\" = \"%s\"", expected, buf);
1588	ret = strncmp(expected, buf, c);
1589
1590	result(llen, ret ? FAIL : OK);
1591	return ret;
1592}
1593
1594static int test_scanf(void)
1595{
1596	unsigned long long ull;
1597	unsigned long ul;
1598	unsigned int u;
1599	long long ll;
1600	long l;
1601	void *p;
1602	int i;
1603
1604	/* return __LINE__ to point to the specific failure */
1605
1606	/* test EOF */
1607	if (sscanf("", "foo") != EOF)
1608		return __LINE__;
1609
1610	/* test simple literal without placeholder */
1611	if (sscanf("foo", "foo") != 0)
1612		return __LINE__;
1613
1614	/* test single placeholder */
1615	if (sscanf("123", "%d", &i) != 1)
1616		return __LINE__;
1617
1618	if (i != 123)
1619		return __LINE__;
1620
1621	/* test multiple place holders and separators */
1622	if (sscanf("a123b456c0x90", "a%db%uc%p", &i, &u, &p) != 3)
1623		return __LINE__;
1624
1625	if (i != 123)
1626		return __LINE__;
1627
1628	if (u != 456)
1629		return __LINE__;
1630
1631	if (p != (void *)0x90)
1632		return __LINE__;
1633
1634	/* test space handling */
1635	if (sscanf("a    b1", "a b%d", &i) != 1)
1636		return __LINE__;
1637
1638	if (i != 1)
1639		return __LINE__;
1640
1641	/* test literal percent */
1642	if (sscanf("a%1", "a%%%d", &i) != 1)
1643		return __LINE__;
1644
1645	if (i != 1)
1646		return __LINE__;
1647
1648	/* test stdint.h types */
1649	if (sscanf("1|2|3|4|5|6",
1650		   "%d|%ld|%lld|%u|%lu|%llu",
1651		   &i, &l, &ll, &u, &ul, &ull) != 6)
1652		return __LINE__;
1653
1654	if (i != 1 || l != 2 || ll != 3 ||
1655	    u != 4 || ul != 5 || ull != 6)
1656		return __LINE__;
1657
1658	return 0;
1659}
1660
1661int test_strerror(void)
1662{
1663	char buf[100];
1664	ssize_t ret;
1665
1666	memset(buf, 'A', sizeof(buf));
1667
1668	errno = EINVAL;
1669	ret = snprintf(buf, sizeof(buf), "%m");
1670	if (is_nolibc) {
1671		if (ret < 6 || memcmp(buf, "errno=", 6))
1672			return 1;
1673	}
1674
1675	return 0;
1676}
1677
1678static int test_printf_error(void)
1679{
1680	int fd, ret, saved_errno;
1681
1682	fd = open("/dev/full", O_RDWR);
1683	if (fd == -1)
1684		return 1;
1685
1686	errno = 0;
1687	ret = dprintf(fd, "foo");
1688	saved_errno = errno;
1689	close(fd);
1690
1691	if (ret != -1)
1692		return 2;
1693
1694	if (saved_errno != ENOSPC)
1695		return 3;
1696
1697	return 0;
1698}
1699
1700static int run_printf(int min, int max)
1701{
1702	int test;
1703	int ret = 0;
1704
1705	for (test = min; test >= 0 && test <= max; test++) {
1706		int llen = 0; /* line length */
1707
1708		/* avoid leaving empty lines below, this will insert holes into
1709		 * test numbers.
1710		 */
1711		switch (test + __LINE__ + 1) {
1712		CASE_TEST(empty);        EXPECT_VFPRINTF(0, "", ""); break;
1713		CASE_TEST(simple);       EXPECT_VFPRINTF(3, "foo", "foo"); break;
1714		CASE_TEST(string);       EXPECT_VFPRINTF(3, "foo", "%s", "foo"); break;
1715		CASE_TEST(number);       EXPECT_VFPRINTF(4, "1234", "%d", 1234); break;
1716		CASE_TEST(negnumber);    EXPECT_VFPRINTF(5, "-1234", "%d", -1234); break;
1717		CASE_TEST(unsigned);     EXPECT_VFPRINTF(5, "12345", "%u", 12345); break;
1718		CASE_TEST(char);         EXPECT_VFPRINTF(1, "c", "%c", 'c'); break;
1719		CASE_TEST(hex);          EXPECT_VFPRINTF(1, "f", "%x", 0xf); break;
1720		CASE_TEST(pointer);      EXPECT_VFPRINTF(3, "0x1", "%p", (void *) 0x1); break;
1721		CASE_TEST(uintmax_t);    EXPECT_VFPRINTF(20, "18446744073709551615", "%ju", 0xffffffffffffffffULL); break;
1722		CASE_TEST(intmax_t);     EXPECT_VFPRINTF(20, "-9223372036854775807", "%jd", 0x8000000000000001LL); break;
1723		CASE_TEST(truncation);   EXPECT_VFPRINTF(25, "01234567890123456789", "%s", "0123456789012345678901234"); break;
1724		CASE_TEST(string_width); EXPECT_VFPRINTF(10, "         1", "%10s", "1"); break;
1725		CASE_TEST(number_width); EXPECT_VFPRINTF(10, "         1", "%10d", 1); break;
1726		CASE_TEST(width_trunc);  EXPECT_VFPRINTF(25, "                    ", "%25d", 1); break;
1727		CASE_TEST(scanf);        EXPECT_ZR(1, test_scanf()); break;
1728		CASE_TEST(strerror);     EXPECT_ZR(1, test_strerror()); break;
1729		CASE_TEST(printf_error); EXPECT_ZR(1, test_printf_error()); break;
1730		case __LINE__:
1731			return ret; /* must be last */
1732		/* note: do not set any defaults so as to permit holes above */
1733		}
1734	}
1735	return ret;
1736}
1737
1738__attribute__((no_sanitize("undefined")))
1739static int smash_stack(void)
1740{
1741	char buf[100];
1742	volatile char *ptr = buf;
1743	size_t i;
1744
1745	for (i = 0; i < 200; i++)
1746		ptr[i] = 'P';
1747
1748	return 1;
1749}
1750
1751static int run_protection(int min __attribute__((unused)),
1752			  int max __attribute__((unused)))
1753{
1754	pid_t pid;
1755	int llen = 0, status;
1756	struct rlimit rlimit = { 0, 0 };
1757
1758	llen += printf("0 -fstackprotector ");
1759
1760#if !defined(_NOLIBC_STACKPROTECTOR)
1761	llen += printf("not supported");
1762	result(llen, SKIPPED);
1763	return 0;
1764#endif
1765
1766#if defined(_NOLIBC_STACKPROTECTOR)
1767	if (!__stack_chk_guard) {
1768		llen += printf("__stack_chk_guard not initialized");
1769		result(llen, FAIL);
1770		return 1;
1771	}
1772#endif
1773
1774	pid = -1;
1775	pid = fork();
1776
1777	switch (pid) {
1778	case -1:
1779		llen += printf("fork()");
1780		result(llen, FAIL);
1781		return 1;
1782
1783	case 0:
1784		close(STDOUT_FILENO);
1785		close(STDERR_FILENO);
1786
1787		prctl(PR_SET_DUMPABLE, 0, 0, 0, 0);
1788		setrlimit(RLIMIT_CORE, &rlimit);
1789		smash_stack();
1790		return 1;
1791
1792	default:
1793		pid = waitpid(pid, &status, 0);
1794
1795		if (pid == -1 || !WIFSIGNALED(status) || WTERMSIG(status) != SIGABRT) {
1796			llen += printf("waitpid()");
1797			result(llen, FAIL);
1798			return 1;
1799		}
1800		result(llen, OK);
1801		return 0;
1802	}
1803}
1804
1805/* prepare what needs to be prepared for pid 1 (stdio, /dev, /proc, etc) */
1806int prepare(void)
1807{
1808	struct stat stat_buf;
1809
1810	/* It's possible that /dev doesn't even exist or was not mounted, so
1811	 * we'll try to create it, mount it, or create minimal entries into it.
1812	 * We want at least /dev/null and /dev/console.
1813	 */
1814	if (stat("/dev/.", &stat_buf) == 0 || mkdir("/dev", 0755) == 0) {
1815		if (stat("/dev/console", &stat_buf) != 0 ||
1816		    stat("/dev/null", &stat_buf) != 0 ||
1817		    stat("/dev/zero", &stat_buf) != 0 ||
1818		    stat("/dev/full", &stat_buf) != 0) {
1819			/* try devtmpfs first, otherwise fall back to manual creation */
1820			if (mount("/dev", "/dev", "devtmpfs", 0, 0) != 0) {
1821				mknod("/dev/console", 0600 | S_IFCHR, makedev(5, 1));
1822				mknod("/dev/null",    0666 | S_IFCHR, makedev(1, 3));
1823				mknod("/dev/zero",    0666 | S_IFCHR, makedev(1, 5));
1824				mknod("/dev/full",    0666 | S_IFCHR, makedev(1, 7));
1825			}
1826		}
1827	}
1828
1829	/* If no /dev/console was found before calling init, stdio is closed so
1830	 * we need to reopen it from /dev/console. If it failed above, it will
1831	 * still fail here and we cannot emit a message anyway.
1832	 */
1833	if (close(dup(1)) == -1) {
1834		int fd = open("/dev/console", O_RDWR);
1835
1836		if (fd >= 0) {
1837			if (fd != 0)
1838				dup2(fd, 0);
1839			if (fd != 1)
1840				dup2(fd, 1);
1841			if (fd != 2)
1842				dup2(fd, 2);
1843			if (fd > 2)
1844				close(fd);
1845			puts("\nSuccessfully reopened /dev/console.");
1846		}
1847	}
1848
1849	/* try to mount /proc if not mounted. Silently fail otherwise */
1850	if (stat("/proc/.", &stat_buf) == 0 || mkdir("/proc", 0755) == 0) {
1851		if (stat("/proc/self", &stat_buf) != 0) {
1852			/* If not mountable, remove /proc completely to avoid misuse */
1853			if (mount("none", "/proc", "proc", 0, 0) != 0)
1854				rmdir("/proc");
1855		}
1856	}
1857
1858	/* some tests rely on a writable /tmp */
1859	mkdir("/tmp", 0755);
1860
1861	return 0;
1862}
1863
1864/* This is the definition of known test names, with their functions */
1865static const struct test test_names[] = {
1866	/* add new tests here */
1867	{ .name = "startup",    .func = run_startup    },
1868	{ .name = "syscall",    .func = run_syscall    },
1869	{ .name = "stdlib",     .func = run_stdlib     },
1870	{ .name = "printf",     .func = run_printf     },
1871	{ .name = "protection", .func = run_protection },
1872	{ 0 }
1873};
1874
1875static int is_setting_valid(char *test)
1876{
1877	int idx, len, test_len, valid = 0;
1878	char delimiter;
1879
1880	if (!test)
1881		return valid;
1882
1883	test_len = strlen(test);
1884
1885	for (idx = 0; test_names[idx].name; idx++) {
1886		len = strlen(test_names[idx].name);
1887		if (test_len < len)
1888			continue;
1889
1890		if (strncmp(test, test_names[idx].name, len) != 0)
1891			continue;
1892
1893		delimiter = test[len];
1894		if (delimiter != ':' && delimiter != ',' && delimiter != '\0')
1895			continue;
1896
1897		valid = 1;
1898		break;
1899	}
1900
1901	return valid;
1902}
1903
1904int main(int argc, char **argv, char **envp)
1905{
1906	int min = 0;
1907	int max = INT_MAX;
1908	int ret = 0;
1909	int err;
1910	int idx;
1911	char *test;
1912
1913	argv0 = argv[0];
1914	test_argc = argc;
1915	test_argv = argv;
1916	test_envp = envp;
1917
1918	/* when called as init, it's possible that no console was opened, for
1919	 * example if no /dev file system was provided. We'll check that fd#1
1920	 * was opened, and if not we'll attempt to create and open /dev/console
1921	 * and /dev/null that we'll use for later tests.
1922	 */
1923	if (getpid() == 1)
1924		prepare();
1925
1926	/* the definition of a series of tests comes from either argv[1] or the
1927	 * "NOLIBC_TEST" environment variable. It's made of a comma-delimited
1928	 * series of test names and optional ranges:
1929	 *    syscall:5-15[:.*],stdlib:8-10
1930	 */
1931	test = argv[1];
1932	if (!is_setting_valid(test))
1933		test = getenv("NOLIBC_TEST");
1934
1935	if (is_setting_valid(test)) {
1936		char *comma, *colon, *dash, *value;
1937
1938		do {
1939			comma = strchr(test, ',');
1940			if (comma)
1941				*(comma++) = '\0';
1942
1943			colon = strchr(test, ':');
1944			if (colon)
1945				*(colon++) = '\0';
1946
1947			for (idx = 0; test_names[idx].name; idx++) {
1948				if (strcmp(test, test_names[idx].name) == 0)
1949					break;
1950			}
1951
1952			if (test_names[idx].name) {
1953				/* The test was named, it will be called at least
1954				 * once. We may have an optional range at <colon>
1955				 * here, which defaults to the full range.
1956				 */
1957				do {
1958					min = 0; max = INT_MAX;
1959					value = colon;
1960					if (value && *value) {
1961						colon = strchr(value, ':');
1962						if (colon)
1963							*(colon++) = '\0';
1964
1965						dash = strchr(value, '-');
1966						if (dash)
1967							*(dash++) = '\0';
1968
1969						/* support :val: :min-max: :min-: :-max: */
1970						if (*value)
1971							min = atoi(value);
1972						if (!dash)
1973							max = min;
1974						else if (*dash)
1975							max = atoi(dash);
1976
1977						value = colon;
1978					}
1979
1980					/* now's time to call the test */
1981					printf("Running test '%s'\n", test_names[idx].name);
1982					err = test_names[idx].func(min, max);
1983					ret += err;
1984					printf("Errors during this test: %d\n\n", err);
1985				} while (colon && *colon);
1986			} else
1987				printf("Ignoring unknown test name '%s'\n", test);
1988
1989			test = comma;
1990		} while (test && *test);
1991	} else {
1992		/* no test mentioned, run everything */
1993		for (idx = 0; test_names[idx].name; idx++) {
1994			printf("Running test '%s'\n", test_names[idx].name);
1995			err = test_names[idx].func(min, max);
1996			ret += err;
1997			printf("Errors during this test: %d\n\n", err);
1998		}
1999	}
2000
2001	printf("Total number of errors: %d\n", ret);
2002
2003	if (getpid() == 1) {
2004		/* we're running as init, there's no other process on the
2005		 * system, thus likely started from a VM for a quick check.
2006		 * Exiting will provoke a kernel panic that may be reported
2007		 * as an error by Qemu or the hypervisor, while stopping
2008		 * cleanly will often be reported as a success. This allows
2009		 * to use the output of this program for bisecting kernels.
2010		 */
2011		printf("Leaving init with final status: %d\n", !!ret);
2012		if (ret == 0)
2013			reboot(RB_POWER_OFF);
2014#if defined(__x86_64__)
2015		/* QEMU started with "-device isa-debug-exit -no-reboot" will
2016		 * exit with status code 2N+1 when N is written to 0x501. We
2017		 * hard-code the syscall here as it's arch-dependent.
2018		 */
2019		else if (syscall(__NR_ioperm, 0x501, 1, 1) == 0)
2020			__asm__ volatile ("outb %%al, %%dx" :: "d"(0x501), "a"(0));
2021		/* if it does nothing, fall back to the regular panic */
2022#endif
2023	}
2024
2025	printf("Exiting with status %d\n", !!ret);
2026	return !!ret;
2027}