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tools/nolibc/string: Fix memcmp() implementation
[linux-block.git] / tools / testing / selftests / nolibc / nolibc-test.c
CommitLineData
362aecb2
WT		 1// SPDX-License-Identifier: GPL-2.0
2
1da02f51
WT		 3#define _GNU_SOURCE
4
362aecb2
WT		 5/* platform-specific include files coming from the compiler */
6#include <limits.h>
7
8/* libc-specific include files
1da02f51 9 * The program may be built in 3 ways:
362aecb2 10 * $(CC) -nostdlib -include /path/to/nolibc.h => NOLIBC already defined
1da02f51
WT		 11 * $(CC) -nostdlib -I/path/to/nolibc/sysroot => _NOLIBC_* guards are present
12 * $(CC) with default libc => NOLIBC* never defined
362aecb2
WT		 13 */
14#ifndef NOLIBC
15#include <stdio.h>
16#include <stdlib.h>
17#include <string.h>
1da02f51
WT		 18#ifndef _NOLIBC_STDIO_H
19/* standard libcs need more includes */
20#include <linux/reboot.h>
21#include <sys/io.h>
22#include <sys/ioctl.h>
23#include <sys/mount.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 <unistd.h>
38#endif
362aecb2
WT		 39#endif
40
41/* will be used by nolibc by getenv() */
42char **environ;
43
23da7bc9
WT		 44/* definition of a series of tests */
45struct test {
46 const char *name; // test name
47 int (*func)(int min, int max); // handler
48};
49
1da02f51
WT		 50#ifndef _NOLIBC_STDLIB_H
51char *itoa(int i)
52{
53 static char buf[12];
54 int ret;
55
56 ret = snprintf(buf, sizeof(buf), "%d", i);
57 return (ret >= 0 && ret < sizeof(buf)) ? buf : "#err";
58}
59#endif
60
362aecb2
WT		 61#define CASE_ERR(err) \
62 case err: return #err
63
64/* returns the error name (e.g. "ENOENT") for common errors, "SUCCESS" for 0,
65 * or the decimal value for less common ones.
66 */
67const char *errorname(int err)
68{
69 switch (err) {
70 case 0: return "SUCCESS";
71 CASE_ERR(EPERM);
72 CASE_ERR(ENOENT);
73 CASE_ERR(ESRCH);
74 CASE_ERR(EINTR);
75 CASE_ERR(EIO);
76 CASE_ERR(ENXIO);
77 CASE_ERR(E2BIG);
78 CASE_ERR(ENOEXEC);
79 CASE_ERR(EBADF);
80 CASE_ERR(ECHILD);
81 CASE_ERR(EAGAIN);
82 CASE_ERR(ENOMEM);
83 CASE_ERR(EACCES);
84 CASE_ERR(EFAULT);
85 CASE_ERR(ENOTBLK);
86 CASE_ERR(EBUSY);
87 CASE_ERR(EEXIST);
88 CASE_ERR(EXDEV);
89 CASE_ERR(ENODEV);
90 CASE_ERR(ENOTDIR);
91 CASE_ERR(EISDIR);
92 CASE_ERR(EINVAL);
93 CASE_ERR(ENFILE);
94 CASE_ERR(EMFILE);
95 CASE_ERR(ENOTTY);
96 CASE_ERR(ETXTBSY);
97 CASE_ERR(EFBIG);
98 CASE_ERR(ENOSPC);
99 CASE_ERR(ESPIPE);
100 CASE_ERR(EROFS);
101 CASE_ERR(EMLINK);
102 CASE_ERR(EPIPE);
103 CASE_ERR(EDOM);
104 CASE_ERR(ERANGE);
105 CASE_ERR(ENOSYS);
106 default:
107 return itoa(err);
108 }
109}
110
111static int pad_spc(int llen, int cnt, const char *fmt, ...)
112{
113 va_list args;
114 int len;
115 int ret;
116
117 for (len = 0; len < cnt - llen; len++)
118 putchar(' ');
119
120 va_start(args, fmt);
121 ret = vfprintf(stdout, fmt, args);
122 va_end(args);
123 return ret < 0 ? ret : ret + len;
124}
125
126/* The tests below are intended to be used by the macroes, which evaluate
127 * expression <expr>, print the status to stdout, and update the "ret"
128 * variable to count failures. The functions themselves return the number
129 * of failures, thus either 0 or 1.
130 */
131
132#define EXPECT_ZR(cond, expr) \
133 do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_zr(expr, llen); } while (0)
134
135static int expect_zr(int expr, int llen)
136{
137 int ret = !(expr == 0);
138
139 llen += printf(" = %d ", expr);
140 pad_spc(llen, 40, ret ? "[FAIL]\n" : " [OK]\n");
141 return ret;
142}
143
144
145#define EXPECT_NZ(cond, expr, val) \
146 do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_nz(expr, llen; } while (0)
147
148static int expect_nz(int expr, int llen)
149{
150 int ret = !(expr != 0);
151
152 llen += printf(" = %d ", expr);
153 pad_spc(llen, 40, ret ? "[FAIL]\n" : " [OK]\n");
154 return ret;
155}
156
157
158#define EXPECT_EQ(cond, expr, val) \
159 do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_eq(expr, llen, val); } while (0)
160
161static int expect_eq(int expr, int llen, int val)
162{
163 int ret = !(expr == val);
164
165 llen += printf(" = %d ", expr);
166 pad_spc(llen, 40, ret ? "[FAIL]\n" : " [OK]\n");
167 return ret;
168}
169
170
171#define EXPECT_NE(cond, expr, val) \
172 do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_ne(expr, llen, val); } while (0)
173
174static int expect_ne(int expr, int llen, int val)
175{
176 int ret = !(expr != val);
177
178 llen += printf(" = %d ", expr);
179 pad_spc(llen, 40, ret ? "[FAIL]\n" : " [OK]\n");
180 return ret;
181}
182
183
184#define EXPECT_GE(cond, expr, val) \
185 do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_ge(expr, llen, val); } while (0)
186
187static int expect_ge(int expr, int llen, int val)
188{
189 int ret = !(expr >= val);
190
191 llen += printf(" = %d ", expr);
192 pad_spc(llen, 40, ret ? "[FAIL]\n" : " [OK]\n");
193 return ret;
194}
195
196
197#define EXPECT_GT(cond, expr, val) \
198 do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_gt(expr, llen, val); } while (0)
199
200static int expect_gt(int expr, int llen, int val)
201{
202 int ret = !(expr > val);
203
204 llen += printf(" = %d ", expr);
205 pad_spc(llen, 40, ret ? "[FAIL]\n" : " [OK]\n");
206 return ret;
207}
208
209
210#define EXPECT_LE(cond, expr, val) \
211 do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_le(expr, llen, val); } while (0)
212
213static int expect_le(int expr, int llen, int val)
214{
215 int ret = !(expr <= val);
216
217 llen += printf(" = %d ", expr);
218 pad_spc(llen, 40, ret ? "[FAIL]\n" : " [OK]\n");
219 return ret;
220}
221
222
223#define EXPECT_LT(cond, expr, val) \
224 do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_lt(expr, llen, val); } while (0)
225
226static int expect_lt(int expr, int llen, int val)
227{
228 int ret = !(expr < val);
229
230 llen += printf(" = %d ", expr);
231 pad_spc(llen, 40, ret ? "[FAIL]\n" : " [OK]\n");
232 return ret;
233}
234
235
236#define EXPECT_SYSZR(cond, expr) \
237 do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_syszr(expr, llen); } while (0)
238
239static int expect_syszr(int expr, int llen)
240{
241 int ret = 0;
242
243 if (expr) {
244 ret = 1;
245 llen += printf(" = %d %s ", expr, errorname(errno));
246 llen += pad_spc(llen, 40, "[FAIL]\n");
247 } else {
248 llen += printf(" = %d ", expr);
249 llen += pad_spc(llen, 40, " [OK]\n");
250 }
251 return ret;
252}
253
254
255#define EXPECT_SYSEQ(cond, expr, val) \
256 do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_syseq(expr, llen, val); } while (0)
257
258static int expect_syseq(int expr, int llen, int val)
259{
260 int ret = 0;
261
262 if (expr != val) {
263 ret = 1;
264 llen += printf(" = %d %s ", expr, errorname(errno));
265 llen += pad_spc(llen, 40, "[FAIL]\n");
266 } else {
267 llen += printf(" = %d ", expr);
268 llen += pad_spc(llen, 40, " [OK]\n");
269 }
270 return ret;
271}
272
273
274#define EXPECT_SYSNE(cond, expr, val) \
275 do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_sysne(expr, llen, val); } while (0)
276
277static int expect_sysne(int expr, int llen, int val)
278{
279 int ret = 0;
280
281 if (expr == val) {
282 ret = 1;
283 llen += printf(" = %d %s ", expr, errorname(errno));
284 llen += pad_spc(llen, 40, "[FAIL]\n");
285 } else {
286 llen += printf(" = %d ", expr);
287 llen += pad_spc(llen, 40, " [OK]\n");
288 }
289 return ret;
290}
291
292
293#define EXPECT_SYSER(cond, expr, expret, experr) \
294 do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_syserr(expr, expret, experr, llen); } while (0)
295
296static int expect_syserr(int expr, int expret, int experr, int llen)
297{
298 int ret = 0;
299 int _errno = errno;
300
301 llen += printf(" = %d %s ", expr, errorname(_errno));
302 if (expr != expret || _errno != experr) {
303 ret = 1;
304 llen += printf(" != (%d %s) ", expret, errorname(experr));
305 llen += pad_spc(llen, 40, "[FAIL]\n");
306 } else {
307 llen += pad_spc(llen, 40, " [OK]\n");
308 }
309 return ret;
310}
311
312
313#define EXPECT_PTRZR(cond, expr) \
314 do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_ptrzr(expr, llen); } while (0)
315
316static int expect_ptrzr(const void *expr, int llen)
317{
318 int ret = 0;
319
320 llen += printf(" = <%p> ", expr);
321 if (expr) {
322 ret = 1;
323 llen += pad_spc(llen, 40, "[FAIL]\n");
324 } else {
325 llen += pad_spc(llen, 40, " [OK]\n");
326 }
327 return ret;
328}
329
330
331#define EXPECT_PTRNZ(cond, expr) \
332 do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_ptrnz(expr, llen); } while (0)
333
334static int expect_ptrnz(const void *expr, int llen)
335{
336 int ret = 0;
337
338 llen += printf(" = <%p> ", expr);
339 if (!expr) {
340 ret = 1;
341 llen += pad_spc(llen, 40, "[FAIL]\n");
342 } else {
343 llen += pad_spc(llen, 40, " [OK]\n");
344 }
345 return ret;
346}
347
348
349#define EXPECT_STRZR(cond, expr) \
350 do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_strzr(expr, llen); } while (0)
351
352static int expect_strzr(const char *expr, int llen)
353{
354 int ret = 0;
355
356 llen += printf(" = <%s> ", expr);
357 if (expr) {
358 ret = 1;
359 llen += pad_spc(llen, 40, "[FAIL]\n");
360 } else {
361 llen += pad_spc(llen, 40, " [OK]\n");
362 }
363 return ret;
364}
365
366
367#define EXPECT_STRNZ(cond, expr) \
368 do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_strnz(expr, llen); } while (0)
369
370static int expect_strnz(const char *expr, int llen)
371{
372 int ret = 0;
373
374 llen += printf(" = <%s> ", expr);
375 if (!expr) {
376 ret = 1;
377 llen += pad_spc(llen, 40, "[FAIL]\n");
378 } else {
379 llen += pad_spc(llen, 40, " [OK]\n");
380 }
381 return ret;
382}
383
384
385#define EXPECT_STREQ(cond, expr, cmp) \
386 do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_streq(expr, llen, cmp); } while (0)
387
388static int expect_streq(const char *expr, int llen, const char *cmp)
389{
390 int ret = 0;
391
392 llen += printf(" = <%s> ", expr);
393 if (strcmp(expr, cmp) != 0) {
394 ret = 1;
395 llen += pad_spc(llen, 40, "[FAIL]\n");
396 } else {
397 llen += pad_spc(llen, 40, " [OK]\n");
398 }
399 return ret;
400}
401
402
403#define EXPECT_STRNE(cond, expr, cmp) \
404 do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_strne(expr, llen, cmp); } while (0)
405
406static int expect_strne(const char *expr, int llen, const char *cmp)
407{
408 int ret = 0;
409
410 llen += printf(" = <%s> ", expr);
411 if (strcmp(expr, cmp) == 0) {
412 ret = 1;
413 llen += pad_spc(llen, 40, "[FAIL]\n");
414 } else {
415 llen += pad_spc(llen, 40, " [OK]\n");
416 }
417 return ret;
418}
419
23da7bc9 420
362aecb2
WT		 421/* declare tests based on line numbers. There must be exactly one test per line. */
422#define CASE_TEST(name) \
423 case __LINE__: llen += printf("%d %s", test, #name);
424
425
b4844fa0
WT		 426/* used by some syscall tests below */
427int test_getdents64(const char *dir)
428{
429 char buffer[4096];
430 int fd, ret;
431 int err;
432
433 ret = fd = open(dir, O_RDONLY | O_DIRECTORY, 0);
434 if (ret < 0)
435 return ret;
436
437 ret = getdents64(fd, (void *)buffer, sizeof(buffer));
438 err = errno;
439 close(fd);
440
441 errno = err;
442 return ret;
443}
444
445/* Run syscall tests between IDs <min> and <max>.
446 * Return 0 on success, non-zero on failure.
447 */
448int run_syscall(int min, int max)
449{
450 struct stat stat_buf;
7172f1c6 451 int proc;
b4844fa0
WT		 452 int test;
453 int tmp;
454 int ret = 0;
455 void *p1, *p2;
456
7172f1c6
WT		 457 /* <proc> indicates whether or not /proc is mounted */
458 proc = stat("/proc", &stat_buf) == 0;
459
b4844fa0
WT		 460 for (test = min; test >= 0 && test <= max; test++) {
461 int llen = 0; // line length
462
463 /* avoid leaving empty lines below, this will insert holes into
464 * test numbers.
465 */
466 switch (test + __LINE__ + 1) {
467 CASE_TEST(getpid); EXPECT_SYSNE(1, getpid(), -1); break;
468 CASE_TEST(getppid); EXPECT_SYSNE(1, getppid(), -1); break;
1da02f51 469#ifdef NOLIBC
b4844fa0 470 CASE_TEST(gettid); EXPECT_SYSNE(1, gettid(), -1); break;
1da02f51 471#endif
b4844fa0
WT		 472 CASE_TEST(getpgid_self); EXPECT_SYSNE(1, getpgid(0), -1); break;
473 CASE_TEST(getpgid_bad); EXPECT_SYSER(1, getpgid(-1), -1, ESRCH); break;
474 CASE_TEST(kill_0); EXPECT_SYSZR(1, kill(getpid(), 0)); break;
475 CASE_TEST(kill_CONT); EXPECT_SYSZR(1, kill(getpid(), 0)); break;
476 CASE_TEST(kill_BADPID); EXPECT_SYSER(1, kill(INT_MAX, 0), -1, ESRCH); break;
477 CASE_TEST(sbrk); if ((p1 = p2 = sbrk(4096)) != (void *)-1) p2 = sbrk(-4096); EXPECT_SYSZR(1, (p2 == (void *)-1) || p2 == p1); break;
478 CASE_TEST(brk); EXPECT_SYSZR(1, brk(sbrk(0))); break;
479 CASE_TEST(chdir_root); EXPECT_SYSZR(1, chdir("/")); break;
480 CASE_TEST(chdir_dot); EXPECT_SYSZR(1, chdir(".")); break;
481 CASE_TEST(chdir_blah); EXPECT_SYSER(1, chdir("/blah"), -1, ENOENT); break;
7172f1c6
WT		 482 CASE_TEST(chmod_net); EXPECT_SYSZR(proc, chmod("/proc/self/net", 0555)); break;
483 CASE_TEST(chmod_self); EXPECT_SYSER(proc, chmod("/proc/self", 0555), -1, EPERM); break;
484 CASE_TEST(chown_self); EXPECT_SYSER(proc, chown("/proc/self", 0, 0), -1, EPERM); break;
b4844fa0
WT		 485 CASE_TEST(chroot_root); EXPECT_SYSZR(1, chroot("/")); break;
486 CASE_TEST(chroot_blah); EXPECT_SYSER(1, chroot("/proc/self/blah"), -1, ENOENT); break;
7172f1c6 487 CASE_TEST(chroot_exe); EXPECT_SYSER(proc, chroot("/proc/self/exe"), -1, ENOTDIR); break;
b4844fa0
WT		 488 CASE_TEST(close_m1); EXPECT_SYSER(1, close(-1), -1, EBADF); break;
489 CASE_TEST(close_dup); EXPECT_SYSZR(1, close(dup(0))); break;
490 CASE_TEST(dup_0); tmp = dup(0); EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
491 CASE_TEST(dup_m1); tmp = dup(-1); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
492 CASE_TEST(dup2_0); tmp = dup2(0, 100); EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
493 CASE_TEST(dup2_m1); tmp = dup2(-1, 100); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
494 CASE_TEST(dup3_0); tmp = dup3(0, 100, 0); EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
495 CASE_TEST(dup3_m1); tmp = dup3(-1, 100, 0); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
496 CASE_TEST(execve_root); EXPECT_SYSER(1, execve("/", (char*[]){ [0] = "/", [1] = NULL }, NULL), -1, EACCES); break;
497 CASE_TEST(getdents64_root); EXPECT_SYSNE(1, test_getdents64("/"), -1); break;
498 CASE_TEST(getdents64_null); EXPECT_SYSER(1, test_getdents64("/dev/null"), -1, ENOTDIR); break;
499 CASE_TEST(gettimeofday_null); EXPECT_SYSZR(1, gettimeofday(NULL, NULL)); break;
1da02f51 500#ifdef NOLIBC
b4844fa0
WT		 501 CASE_TEST(gettimeofday_bad1); EXPECT_SYSER(1, gettimeofday((void *)1, NULL), -1, EFAULT); break;
502 CASE_TEST(gettimeofday_bad2); EXPECT_SYSER(1, gettimeofday(NULL, (void *)1), -1, EFAULT); break;
503 CASE_TEST(gettimeofday_bad2); EXPECT_SYSER(1, gettimeofday(NULL, (void *)1), -1, EFAULT); break;
1da02f51 504#endif
b4844fa0
WT		 505 CASE_TEST(ioctl_tiocinq); EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break;
506 CASE_TEST(ioctl_tiocinq); EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break;
507 CASE_TEST(link_root1); EXPECT_SYSER(1, link("/", "/"), -1, EEXIST); break;
508 CASE_TEST(link_blah); EXPECT_SYSER(1, link("/proc/self/blah", "/blah"), -1, ENOENT); break;
509 CASE_TEST(link_dir); EXPECT_SYSER(1, link("/", "/blah"), -1, EPERM); break;
7172f1c6 510 CASE_TEST(link_cross); EXPECT_SYSER(proc, link("/proc/self/net", "/blah"), -1, EXDEV); break;
b4844fa0
WT		 511 CASE_TEST(lseek_m1); EXPECT_SYSER(1, lseek(-1, 0, SEEK_SET), -1, EBADF); break;
512 CASE_TEST(lseek_0); EXPECT_SYSER(1, lseek(0, 0, SEEK_SET), -1, ESPIPE); break;
513 CASE_TEST(mkdir_root); EXPECT_SYSER(1, mkdir("/", 0755), -1, EEXIST); break;
514 CASE_TEST(open_tty); EXPECT_SYSNE(1, tmp = open("/dev/null", 0), -1); if (tmp != -1) close(tmp); break;
515 CASE_TEST(open_blah); EXPECT_SYSER(1, tmp = open("/proc/self/blah", 0), -1, ENOENT); if (tmp != -1) close(tmp); break;
516 CASE_TEST(poll_null); EXPECT_SYSZR(1, poll(NULL, 0, 0)); break;
517 CASE_TEST(poll_stdout); EXPECT_SYSNE(1, ({ struct pollfd fds = { 1, POLLOUT, 0}; poll(&fds, 1, 0); }), -1); break;
518 CASE_TEST(poll_fault); EXPECT_SYSER(1, poll((void *)1, 1, 0), -1, EFAULT); break;
519 CASE_TEST(read_badf); EXPECT_SYSER(1, read(-1, &tmp, 1), -1, EBADF); break;
520 CASE_TEST(sched_yield); EXPECT_SYSZR(1, sched_yield()); break;
521 CASE_TEST(select_null); EXPECT_SYSZR(1, ({ struct timeval tv = { 0 }; select(0, NULL, NULL, NULL, &tv); })); break;
522 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;
523 CASE_TEST(select_fault); EXPECT_SYSER(1, select(1, (void *)1, NULL, NULL, 0), -1, EFAULT); break;
524 CASE_TEST(stat_blah); EXPECT_SYSER(1, stat("/proc/self/blah", &stat_buf), -1, ENOENT); break;
525 CASE_TEST(stat_fault); EXPECT_SYSER(1, stat(NULL, &stat_buf), -1, EFAULT); break;
526 CASE_TEST(symlink_root); EXPECT_SYSER(1, symlink("/", "/"), -1, EEXIST); break;
527 CASE_TEST(unlink_root); EXPECT_SYSER(1, unlink("/"), -1, EISDIR); break;
528 CASE_TEST(unlink_blah); EXPECT_SYSER(1, unlink("/proc/self/blah"), -1, ENOENT); break;
529 CASE_TEST(wait_child); EXPECT_SYSER(1, wait(&tmp), -1, ECHILD); break;
530 CASE_TEST(waitpid_min); EXPECT_SYSER(1, waitpid(INT_MIN, &tmp, WNOHANG), -1, ESRCH); break;
531 CASE_TEST(waitpid_child); EXPECT_SYSER(1, waitpid(getpid(), &tmp, WNOHANG), -1, ECHILD); break;
532 CASE_TEST(write_badf); EXPECT_SYSER(1, write(-1, &tmp, 1), -1, EBADF); break;
533 CASE_TEST(write_zero); EXPECT_SYSZR(1, write(1, &tmp, 0)); break;
534 case __LINE__:
535 return ret; /* must be last */
536 /* note: do not set any defaults so as to permit holes above */
537 }
538 }
539 return ret;
540}
541
95bc9894
WT		 542int run_stdlib(int min, int max)
543{
544 int test;
545 int tmp;
546 int ret = 0;
547 void *p1, *p2;
548
549 for (test = min; test >= 0 && test <= max; test++) {
550 int llen = 0; // line length
551
552 /* avoid leaving empty lines below, this will insert holes into
553 * test numbers.
554 */
555 switch (test + __LINE__ + 1) {
556 CASE_TEST(getenv_TERM); EXPECT_STRNZ(1, getenv("TERM")); break;
557 CASE_TEST(getenv_blah); EXPECT_STRZR(1, getenv("blah")); break;
558 CASE_TEST(setcmp_blah_blah); EXPECT_EQ(1, strcmp("blah", "blah"), 0); break;
559 CASE_TEST(setcmp_blah_blah2); EXPECT_NE(1, strcmp("blah", "blah2"), 0); break;
560 CASE_TEST(setncmp_blah_blah); EXPECT_EQ(1, strncmp("blah", "blah", 10), 0); break;
561 CASE_TEST(setncmp_blah_blah4); EXPECT_EQ(1, strncmp("blah", "blah4", 4), 0); break;
562 CASE_TEST(setncmp_blah_blah5); EXPECT_NE(1, strncmp("blah", "blah5", 5), 0); break;
563 CASE_TEST(setncmp_blah_blah6); EXPECT_NE(1, strncmp("blah", "blah6", 6), 0); break;
564 CASE_TEST(strchr_foobar_o); EXPECT_STREQ(1, strchr("foobar", 'o'), "oobar"); break;
565 CASE_TEST(strchr_foobar_z); EXPECT_STRZR(1, strchr("foobar", 'z')); break;
566 CASE_TEST(strrchr_foobar_o); EXPECT_STREQ(1, strrchr("foobar", 'o'), "obar"); break;
567 CASE_TEST(strrchr_foobar_z); EXPECT_STRZR(1, strrchr("foobar", 'z')); break;
568 case __LINE__:
569 return ret; /* must be last */
570 /* note: do not set any defaults so as to permit holes above */
571 }
572 }
573 return ret;
574}
575
1a5454f6
WT		 576/* prepare what needs to be prepared for pid 1 (stdio, /dev, /proc, etc) */
577int prepare(void)
578{
579 struct stat stat_buf;
580
581 /* It's possible that /dev doesn't even exist or was not mounted, so
582 * we'll try to create it, mount it, or create minimal entries into it.
583 * We want at least /dev/null and /dev/console.
584 */
585 if (stat("/dev/.", &stat_buf) == 0 || mkdir("/dev", 0755) == 0) {
586 if (stat("/dev/console", &stat_buf) != 0 ||
587 stat("/dev/null", &stat_buf) != 0) {
588 /* try devtmpfs first, otherwise fall back to manual creation */
589 if (mount("/dev", "/dev", "devtmpfs", 0, 0) != 0) {
590 mknod("/dev/console", 0600 | S_IFCHR, makedev(5, 1));
591 mknod("/dev/null", 0666 | S_IFCHR, makedev(1, 3));
592 }
593 }
594 }
595
596 /* If no /dev/console was found before calling init, stdio is closed so
597 * we need to reopen it from /dev/console. If it failed above, it will
598 * still fail here and we cannot emit a message anyway.
599 */
600 if (close(dup(1)) == -1) {
601 int fd = open("/dev/console", O_RDWR);
602
603 if (fd >= 0) {
604 if (fd != 0)
605 dup2(fd, 0);
606 if (fd != 1)
607 dup2(fd, 1);
608 if (fd != 2)
609 dup2(fd, 2);
610 if (fd > 2)
611 close(fd);
612 puts("\nSuccessfully reopened /dev/console.");
613 }
614 }
615
616 /* try to mount /proc if not mounted. Silently fail otherwise */
617 if (stat("/proc/.", &stat_buf) == 0 || mkdir("/proc", 0755) == 0) {
618 if (stat("/proc/self", &stat_buf) != 0)
619 mount("/proc", "/proc", "proc", 0, 0);
620 }
621
622 return 0;
623}
b4844fa0 624
23da7bc9
WT		 625/* This is the definition of known test names, with their functions */
626static struct test test_names[] = {
627 /* add new tests here */
b4844fa0 628 { .name = "syscall", .func = run_syscall },
95bc9894 629 { .name = "stdlib", .func = run_stdlib },
23da7bc9
WT		 630 { 0 }
631};
632
362aecb2
WT		 633int main(int argc, char **argv, char **envp)
634{
635 int min = 0;
636 int max = __INT_MAX__;
637 int ret = 0;
23da7bc9
WT		 638 int err;
639 int idx;
640 char *test;
362aecb2
WT		 641
642 environ = envp;
643
1a5454f6
WT		 644 /* when called as init, it's possible that no console was opened, for
645 * example if no /dev file system was provided. We'll check that fd#1
646 * was opened, and if not we'll attempt to create and open /dev/console
647 * and /dev/null that we'll use for later tests.
648 */
649 if (getpid() == 1)
650 prepare();
651
23da7bc9
WT		 652 /* the definition of a series of tests comes from either argv[1] or the
653 * "NOLIBC_TEST" environment variable. It's made of a comma-delimited
654 * series of test names and optional ranges:
655 * syscall:5-15[:.*],stdlib:8-10
656 */
657 test = argv[1];
658 if (!test)
659 test = getenv("NOLIBC_TEST");
660
661 if (test) {
662 char *comma, *colon, *dash, *value;
663
664 do {
665 comma = strchr(test, ',');
666 if (comma)
667 *(comma++) = '\0';
668
669 colon = strchr(test, ':');
670 if (colon)
671 *(colon++) = '\0';
672
673 for (idx = 0; test_names[idx].name; idx++) {
674 if (strcmp(test, test_names[idx].name) == 0)
675 break;
676 }
677
678 if (test_names[idx].name) {
679 /* The test was named, it will be called at least
680 * once. We may have an optional range at <colon>
681 * here, which defaults to the full range.
682 */
683 do {
684 min = 0; max = __INT_MAX__;
685 value = colon;
686 if (value && *value) {
687 colon = strchr(value, ':');
688 if (colon)
689 *(colon++) = '\0';
690
691 dash = strchr(value, '-');
692 if (dash)
693 *(dash++) = '\0';
694
695 /* support :val: :min-max: :min-: :-max: */
696 if (*value)
697 min = atoi(value);
698 if (!dash)
699 max = min;
700 else if (*dash)
701 max = atoi(dash);
702
703 value = colon;
704 }
705
706 /* now's time to call the test */
707 printf("Running test '%s'\n", test_names[idx].name);
708 err = test_names[idx].func(min, max);
709 ret += err;
710 printf("Errors during this test: %d\n\n", err);
711 } while (colon && *colon);
712 } else
713 printf("Ignoring unknown test name '%s'\n", test);
714
715 test = comma;
716 } while (test && *test);
717 } else {
718 /* no test mentioned, run everything */
719 for (idx = 0; test_names[idx].name; idx++) {
720 printf("Running test '%s'\n", test_names[idx].name);
721 err = test_names[idx].func(min, max);
722 ret += err;
723 printf("Errors during this test: %d\n\n", err);
724 }
725 }
726
362aecb2 727 printf("Total number of errors: %d\n", ret);
f49896d7
WT		 728
729 if (getpid() == 1) {
730 /* we're running as init, there's no other process on the
731 * system, thus likely started from a VM for a quick check.
732 * Exiting will provoke a kernel panic that may be reported
733 * as an error by Qemu or the hypervisor, while stopping
734 * cleanly will often be reported as a success. This allows
735 * to use the output of this program for bisecting kernels.
736 */
737 printf("Leaving init with final status: %d\n", !!ret);
738 if (ret == 0)
739 reboot(LINUX_REBOOT_CMD_POWER_OFF);
aa73a86c
WT		 740#if defined(__x86_64__)
741 /* QEMU started with "-device isa-debug-exit -no-reboot" will
742 * exit with status code 2N+1 when N is written to 0x501. We
743 * hard-code the syscall here as it's arch-dependent.
744 */
1da02f51 745#if defined(_NOLIBC_SYS_H)
aa73a86c 746 else if (my_syscall3(__NR_ioperm, 0x501, 1, 1) == 0)
1da02f51
WT		 747#else
748 else if (ioperm(0x501, 1, 1) == 0)
749#endif
aa73a86c
WT		 750 asm volatile ("outb %%al, %%dx" :: "d"(0x501), "a"(0));
751 /* if it does nothing, fall back to the regular panic */
752#endif
f49896d7
WT		 753 }
754
362aecb2
WT		 755 printf("Exiting with status %d\n", !!ret);
756 return !!ret;
757}
Linux 6.x block layer and io_uring tree(s)