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1 // SPDX-License-Identifier: GPL-2.0
2
3 #define _GNU_SOURCE
4
5 /* platform-specific include files coming from the compiler */
6 #include <limits.h>
7
8 /* libc-specific include files
9  * The program may be built in 3 ways:
10  *   $(CC) -nostdlib -include /path/to/nolibc.h => NOLIBC already defined
11  *   $(CC) -nostdlib -I/path/to/nolibc/sysroot  => _NOLIBC_* guards are present
12  *   $(CC) with default libc                    => NOLIBC* never defined
13  */
14 #ifndef NOLIBC
15 #include <stdio.h>
16 #include <stdlib.h>
17 #include <string.h>
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
39 #endif
40
41 /* will be used by nolibc by getenv() */
42 char **environ;
43
44 /* definition of a series of tests */
45 struct test {
46         const char *name;              // test name
47         int (*func)(int min, int max); // handler
48 };
49
50 #ifndef _NOLIBC_STDLIB_H
51 char *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
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  */
67 const 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
111 static 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
135 static 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
148 static 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
161 static 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
174 static 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
187 static 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
200 static 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
213 static 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
226 static 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
239 static 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
258 static 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
277 static 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
296 static 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
316 static 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
334 static 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
352 static 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
370 static 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
388 static 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
406 static 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
420
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
426 /* used by some syscall tests below */
427 int 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  */
448 int run_syscall(int min, int max)
449 {
450         struct stat stat_buf;
451         int proc;
452         int test;
453         int tmp;
454         int ret = 0;
455         void *p1, *p2;
456
457         /* <proc> indicates whether or not /proc is mounted */
458         proc = stat("/proc", &stat_buf) == 0;
459
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;
469 #ifdef NOLIBC
470                 CASE_TEST(gettid);            EXPECT_SYSNE(1, gettid(), -1); break;
471 #endif
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;
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;
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;
487                 CASE_TEST(chroot_exe);        EXPECT_SYSER(proc, chroot("/proc/self/exe"), -1, ENOTDIR); break;
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;
500 #ifdef NOLIBC
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;
504 #endif
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;
510                 CASE_TEST(link_cross);        EXPECT_SYSER(proc, link("/proc/self/net", "/blah"), -1, EXDEV); break;
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
542 int 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_TEST(memcmp_20_20);       EXPECT_EQ(1, memcmp("aaa\x20", "aaa\x20", 4), 0); break;
569                 CASE_TEST(memcmp_20_60);       EXPECT_LT(1, memcmp("aaa\x20", "aaa\x60", 4), 0); break;
570                 CASE_TEST(memcmp_60_20);       EXPECT_GT(1, memcmp("aaa\x60", "aaa\x20", 4), 0); break;
571                 CASE_TEST(memcmp_20_e0);       EXPECT_LT(1, memcmp("aaa\x20", "aaa\xe0", 4), 0); break;
572                 CASE_TEST(memcmp_e0_20);       EXPECT_GT(1, memcmp("aaa\xe0", "aaa\x20", 4), 0); break;
573                 CASE_TEST(memcmp_80_e0);       EXPECT_LT(1, memcmp("aaa\x80", "aaa\xe0", 4), 0); break;
574                 CASE_TEST(memcmp_e0_80);       EXPECT_GT(1, memcmp("aaa\xe0", "aaa\x80", 4), 0); break;
575                 case __LINE__:
576                         return ret; /* must be last */
577                 /* note: do not set any defaults so as to permit holes above */
578                 }
579         }
580         return ret;
581 }
582
583 /* prepare what needs to be prepared for pid 1 (stdio, /dev, /proc, etc) */
584 int prepare(void)
585 {
586         struct stat stat_buf;
587
588         /* It's possible that /dev doesn't even exist or was not mounted, so
589          * we'll try to create it, mount it, or create minimal entries into it.
590          * We want at least /dev/null and /dev/console.
591          */
592         if (stat("/dev/.", &stat_buf) == 0 || mkdir("/dev", 0755) == 0) {
593                 if (stat("/dev/console", &stat_buf) != 0 ||
594                     stat("/dev/null", &stat_buf) != 0) {
595                         /* try devtmpfs first, otherwise fall back to manual creation */
596                         if (mount("/dev", "/dev", "devtmpfs", 0, 0) != 0) {
597                                 mknod("/dev/console", 0600 | S_IFCHR, makedev(5, 1));
598                                 mknod("/dev/null",    0666 | S_IFCHR, makedev(1, 3));
599                         }
600                 }
601         }
602
603         /* If no /dev/console was found before calling init, stdio is closed so
604          * we need to reopen it from /dev/console. If it failed above, it will
605          * still fail here and we cannot emit a message anyway.
606          */
607         if (close(dup(1)) == -1) {
608                 int fd = open("/dev/console", O_RDWR);
609
610                 if (fd >= 0) {
611                         if (fd != 0)
612                                 dup2(fd, 0);
613                         if (fd != 1)
614                                 dup2(fd, 1);
615                         if (fd != 2)
616                                 dup2(fd, 2);
617                         if (fd > 2)
618                                 close(fd);
619                         puts("\nSuccessfully reopened /dev/console.");
620                 }
621         }
622
623         /* try to mount /proc if not mounted. Silently fail otherwise */
624         if (stat("/proc/.", &stat_buf) == 0 || mkdir("/proc", 0755) == 0) {
625                 if (stat("/proc/self", &stat_buf) != 0)
626                         mount("/proc", "/proc", "proc", 0, 0);
627         }
628
629         return 0;
630 }
631
632 /* This is the definition of known test names, with their functions */
633 static struct test test_names[] = {
634         /* add new tests here */
635         { .name = "syscall",   .func = run_syscall  },
636         { .name = "stdlib",    .func = run_stdlib   },
637         { 0 }
638 };
639
640 int main(int argc, char **argv, char **envp)
641 {
642         int min = 0;
643         int max = __INT_MAX__;
644         int ret = 0;
645         int err;
646         int idx;
647         char *test;
648
649         environ = envp;
650
651         /* when called as init, it's possible that no console was opened, for
652          * example if no /dev file system was provided. We'll check that fd#1
653          * was opened, and if not we'll attempt to create and open /dev/console
654          * and /dev/null that we'll use for later tests.
655          */
656         if (getpid() == 1)
657                 prepare();
658
659         /* the definition of a series of tests comes from either argv[1] or the
660          * "NOLIBC_TEST" environment variable. It's made of a comma-delimited
661          * series of test names and optional ranges:
662          *    syscall:5-15[:.*],stdlib:8-10
663          */
664         test = argv[1];
665         if (!test)
666                 test = getenv("NOLIBC_TEST");
667
668         if (test) {
669                 char *comma, *colon, *dash, *value;
670
671                 do {
672                         comma = strchr(test, ',');
673                         if (comma)
674                                 *(comma++) = '\0';
675
676                         colon = strchr(test, ':');
677                         if (colon)
678                                 *(colon++) = '\0';
679
680                         for (idx = 0; test_names[idx].name; idx++) {
681                                 if (strcmp(test, test_names[idx].name) == 0)
682                                         break;
683                         }
684
685                         if (test_names[idx].name) {
686                                 /* The test was named, it will be called at least
687                                  * once. We may have an optional range at <colon>
688                                  * here, which defaults to the full range.
689                                  */
690                                 do {
691                                         min = 0; max = __INT_MAX__;
692                                         value = colon;
693                                         if (value && *value) {
694                                                 colon = strchr(value, ':');
695                                                 if (colon)
696                                                         *(colon++) = '\0';
697
698                                                 dash = strchr(value, '-');
699                                                 if (dash)
700                                                         *(dash++) = '\0';
701
702                                                 /* support :val: :min-max: :min-: :-max: */
703                                                 if (*value)
704                                                         min = atoi(value);
705                                                 if (!dash)
706                                                         max = min;
707                                                 else if (*dash)
708                                                         max = atoi(dash);
709
710                                                 value = colon;
711                                         }
712
713                                         /* now's time to call the test */
714                                         printf("Running test '%s'\n", test_names[idx].name);
715                                         err = test_names[idx].func(min, max);
716                                         ret += err;
717                                         printf("Errors during this test: %d\n\n", err);
718                                 } while (colon && *colon);
719                         } else
720                                 printf("Ignoring unknown test name '%s'\n", test);
721
722                         test = comma;
723                 } while (test && *test);
724         } else {
725                 /* no test mentioned, run everything */
726                 for (idx = 0; test_names[idx].name; idx++) {
727                         printf("Running test '%s'\n", test_names[idx].name);
728                         err = test_names[idx].func(min, max);
729                         ret += err;
730                         printf("Errors during this test: %d\n\n", err);
731                 }
732         }
733
734         printf("Total number of errors: %d\n", ret);
735
736         if (getpid() == 1) {
737                 /* we're running as init, there's no other process on the
738                  * system, thus likely started from a VM for a quick check.
739                  * Exiting will provoke a kernel panic that may be reported
740                  * as an error by Qemu or the hypervisor, while stopping
741                  * cleanly will often be reported as a success. This allows
742                  * to use the output of this program for bisecting kernels.
743                  */
744                 printf("Leaving init with final status: %d\n", !!ret);
745                 if (ret == 0)
746                         reboot(LINUX_REBOOT_CMD_POWER_OFF);
747 #if defined(__x86_64__)
748                 /* QEMU started with "-device isa-debug-exit -no-reboot" will
749                  * exit with status code 2N+1 when N is written to 0x501. We
750                  * hard-code the syscall here as it's arch-dependent.
751                  */
752 #if defined(_NOLIBC_SYS_H)
753                 else if (my_syscall3(__NR_ioperm, 0x501, 1, 1) == 0)
754 #else
755                 else if (ioperm(0x501, 1, 1) == 0)
756 #endif
757                         asm volatile ("outb %%al, %%dx" :: "d"(0x501), "a"(0));
758                 /* if it does nothing, fall back to the regular panic */
759 #endif
760         }
761
762         printf("Exiting with status %d\n", !!ret);
763         return !!ret;
764 }
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