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19#define _GNU_SOURCE
20#include <stdarg.h>
21#include <stdlib.h>
22#include <stdio.h>
23#include <unistd.h>
24#include <fcntl.h>
25#include <inttypes.h>
26#include <string.h>
27#include <sys/types.h>
28#include <sys/stat.h>
29#include <sys/wait.h>
30#include <errno.h>
31#include <utime.h>
32#include <time.h>
33#include <sys/time.h>
34#include <sys/resource.h>
35#include <sys/uio.h>
36#include <sys/socket.h>
37#include <netinet/in.h>
38#include <arpa/inet.h>
39#include <sched.h>
40#include <dirent.h>
41#include <setjmp.h>
42#include <sys/shm.h>
43#include <assert.h>
44
45#define STACK_SIZE 16384
46
47static void error1(const char *filename, int line, const char *fmt, ...)
48{
49 va_list ap;
50 va_start(ap, fmt);
51 fprintf(stderr, "%s:%d: ", filename, line);
52 vfprintf(stderr, fmt, ap);
53 fprintf(stderr, "\n");
54 va_end(ap);
55 exit(1);
56}
57
58static int __chk_error(const char *filename, int line, int ret)
59{
60 if (ret < 0) {
61 error1(filename, line, "%m (ret=%d, errno=%d/%s)",
62 ret, errno, strerror(errno));
63 }
64 return ret;
65}
66
67#define error(fmt, ...) error1(__FILE__, __LINE__, fmt, ## __VA_ARGS__)
68
69#define chk_error(ret) __chk_error(__FILE__, __LINE__, (ret))
70
71
72
73#define FILE_BUF_SIZE 300
74
75static void test_file(void)
76{
77 int fd, i, len, ret;
78 uint8_t buf[FILE_BUF_SIZE];
79 uint8_t buf2[FILE_BUF_SIZE];
80 uint8_t buf3[FILE_BUF_SIZE];
81 char cur_dir[1024];
82 struct stat st;
83 struct utimbuf tbuf;
84 struct iovec vecs[2];
85 DIR *dir;
86 struct dirent64 *de;
87
88 char template[] = "/tmp/linux-test-XXXXXX";
89 char *tmpdir = mkdtemp(template);
90
91 assert(tmpdir);
92
93 if (getcwd(cur_dir, sizeof(cur_dir)) == NULL)
94 error("getcwd");
95
96 chk_error(chdir(tmpdir));
97
98
99
100 fd = chk_error(open("file1", O_WRONLY | O_TRUNC | O_CREAT, 0644));
101 for(i=0;i < FILE_BUF_SIZE; i++)
102 buf[i] = i;
103 len = chk_error(write(fd, buf, FILE_BUF_SIZE / 2));
104 if (len != (FILE_BUF_SIZE / 2))
105 error("write");
106 vecs[0].iov_base = buf + (FILE_BUF_SIZE / 2);
107 vecs[0].iov_len = 16;
108 vecs[1].iov_base = buf + (FILE_BUF_SIZE / 2) + 16;
109 vecs[1].iov_len = (FILE_BUF_SIZE / 2) - 16;
110 len = chk_error(writev(fd, vecs, 2));
111 if (len != (FILE_BUF_SIZE / 2))
112 error("writev");
113 chk_error(close(fd));
114
115 chk_error(rename("file1", "file2"));
116
117 fd = chk_error(open("file2", O_RDONLY));
118
119 len = chk_error(read(fd, buf2, FILE_BUF_SIZE));
120 if (len != FILE_BUF_SIZE)
121 error("read");
122 if (memcmp(buf, buf2, FILE_BUF_SIZE) != 0)
123 error("memcmp");
124
125#define FOFFSET 16
126 ret = chk_error(lseek(fd, FOFFSET, SEEK_SET));
127 if (ret != 16)
128 error("lseek");
129 vecs[0].iov_base = buf3;
130 vecs[0].iov_len = 32;
131 vecs[1].iov_base = buf3 + 32;
132 vecs[1].iov_len = FILE_BUF_SIZE - FOFFSET - 32;
133 len = chk_error(readv(fd, vecs, 2));
134 if (len != FILE_BUF_SIZE - FOFFSET)
135 error("readv");
136 if (memcmp(buf + FOFFSET, buf3, FILE_BUF_SIZE - FOFFSET) != 0)
137 error("memcmp");
138
139 chk_error(close(fd));
140
141
142 chk_error(access("file2", R_OK));
143
144
145
146 chk_error(chmod("file2", 0600));
147 tbuf.actime = 1001;
148 tbuf.modtime = 1000;
149 chk_error(truncate("file2", 100));
150 chk_error(utime("file2", &tbuf));
151 chk_error(stat("file2", &st));
152 if (st.st_size != 100)
153 error("stat size");
154 if (!S_ISREG(st.st_mode))
155 error("stat mode");
156 if ((st.st_mode & 0777) != 0600)
157 error("stat mode2");
158 if (st.st_atime != 1001 ||
159 st.st_mtime != 1000)
160 error("stat time");
161
162 chk_error(stat(tmpdir, &st));
163 if (!S_ISDIR(st.st_mode))
164 error("stat mode");
165
166
167 fd = chk_error(open("file2", O_RDWR));
168 chk_error(ftruncate(fd, 50));
169 chk_error(fstat(fd, &st));
170 chk_error(close(fd));
171
172 if (st.st_size != 50)
173 error("stat size");
174 if (!S_ISREG(st.st_mode))
175 error("stat mode");
176
177
178 chk_error(symlink("file2", "file3"));
179 chk_error(lstat("file3", &st));
180 if (!S_ISLNK(st.st_mode))
181 error("stat mode");
182
183
184 dir = opendir(tmpdir);
185 if (!dir)
186 error("opendir");
187 len = 0;
188 for(;;) {
189 de = readdir64(dir);
190 if (!de)
191 break;
192 if (strcmp(de->d_name, ".") != 0 &&
193 strcmp(de->d_name, "..") != 0 &&
194 strcmp(de->d_name, "file2") != 0 &&
195 strcmp(de->d_name, "file3") != 0)
196 error("readdir");
197 len++;
198 }
199 closedir(dir);
200 if (len != 4)
201 error("readdir");
202
203 chk_error(unlink("file3"));
204 chk_error(unlink("file2"));
205 chk_error(chdir(cur_dir));
206 chk_error(rmdir(tmpdir));
207}
208
209static void test_fork(void)
210{
211 int pid, status;
212
213 pid = chk_error(fork());
214 if (pid == 0) {
215
216 sleep(2);
217 exit(2);
218 }
219 chk_error(waitpid(pid, &status, 0));
220 if (!WIFEXITED(status) || WEXITSTATUS(status) != 2)
221 error("waitpid status=0x%x", status);
222}
223
224static void test_time(void)
225{
226 struct timeval tv, tv2;
227 struct timespec ts, rem;
228 struct rusage rusg1, rusg2;
229 int ti, i;
230
231 chk_error(gettimeofday(&tv, NULL));
232 rem.tv_sec = 1;
233 ts.tv_sec = 0;
234 ts.tv_nsec = 20 * 1000000;
235 chk_error(nanosleep(&ts, &rem));
236 if (rem.tv_sec != 1)
237 error("nanosleep");
238 chk_error(gettimeofday(&tv2, NULL));
239 ti = tv2.tv_sec - tv.tv_sec;
240 if (ti >= 2)
241 error("gettimeofday");
242
243 chk_error(getrusage(RUSAGE_SELF, &rusg1));
244 for(i = 0;i < 10000; i++);
245 chk_error(getrusage(RUSAGE_SELF, &rusg2));
246 if ((rusg2.ru_utime.tv_sec - rusg1.ru_utime.tv_sec) < 0 ||
247 (rusg2.ru_stime.tv_sec - rusg1.ru_stime.tv_sec) < 0)
248 error("getrusage");
249}
250
251static int server_socket(void)
252{
253 int val, fd;
254 struct sockaddr_in sockaddr = {};
255
256
257 fd = chk_error(socket(PF_INET, SOCK_STREAM, 0));
258
259 val = 1;
260 chk_error(setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)));
261
262 sockaddr.sin_family = AF_INET;
263 sockaddr.sin_port = htons(0);
264 sockaddr.sin_addr.s_addr = 0;
265 chk_error(bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)));
266 chk_error(listen(fd, 0));
267 return fd;
268
269}
270
271static int client_socket(uint16_t port)
272{
273 int fd;
274 struct sockaddr_in sockaddr = {};
275
276
277 fd = chk_error(socket(PF_INET, SOCK_STREAM, 0));
278 sockaddr.sin_family = AF_INET;
279 sockaddr.sin_port = htons(port);
280 inet_aton("127.0.0.1", &sockaddr.sin_addr);
281 chk_error(connect(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)));
282 return fd;
283}
284
285static const char socket_msg[] = "hello socket\n";
286
287static void test_socket(void)
288{
289 int server_fd, client_fd, fd, pid, ret, val;
290 struct sockaddr_in sockaddr;
291 struct sockaddr_in server_addr;
292 socklen_t len, socklen;
293 uint16_t server_port;
294 char buf[512];
295
296 server_fd = server_socket();
297
298 socklen = sizeof(server_addr);
299 ret = getsockname(server_fd, (struct sockaddr *)&server_addr, &socklen);
300 chk_error(ret);
301 server_port = ntohs(server_addr.sin_port);
302
303
304 len = sizeof(val);
305 chk_error(getsockopt(server_fd, SOL_SOCKET, SO_TYPE, &val, &len));
306 if (val != SOCK_STREAM)
307 error("getsockopt");
308
309 pid = chk_error(fork());
310 if (pid == 0) {
311 client_fd = client_socket(server_port);
312 send(client_fd, socket_msg, sizeof(socket_msg), 0);
313 close(client_fd);
314 exit(0);
315 }
316 len = sizeof(sockaddr);
317 fd = chk_error(accept(server_fd, (struct sockaddr *)&sockaddr, &len));
318
319 ret = chk_error(recv(fd, buf, sizeof(buf), 0));
320 if (ret != sizeof(socket_msg))
321 error("recv");
322 if (memcmp(buf, socket_msg, sizeof(socket_msg)) != 0)
323 error("socket_msg");
324 chk_error(close(fd));
325 chk_error(close(server_fd));
326}
327
328#define WCOUNT_MAX 512
329
330static void test_pipe(void)
331{
332 fd_set rfds, wfds;
333 int fds[2], fd_max, ret;
334 uint8_t ch;
335 int wcount, rcount;
336
337 chk_error(pipe(fds));
338 chk_error(fcntl(fds[0], F_SETFL, O_NONBLOCK));
339 chk_error(fcntl(fds[1], F_SETFL, O_NONBLOCK));
340 wcount = 0;
341 rcount = 0;
342 for(;;) {
343 FD_ZERO(&rfds);
344 fd_max = fds[0];
345 FD_SET(fds[0], &rfds);
346
347 FD_ZERO(&wfds);
348 FD_SET(fds[1], &wfds);
349 if (fds[1] > fd_max)
350 fd_max = fds[1];
351
352 ret = chk_error(select(fd_max + 1, &rfds, &wfds, NULL, NULL));
353 if (ret > 0) {
354 if (FD_ISSET(fds[0], &rfds)) {
355 chk_error(read(fds[0], &ch, 1));
356 rcount++;
357 if (rcount >= WCOUNT_MAX)
358 break;
359 }
360 if (FD_ISSET(fds[1], &wfds)) {
361 ch = 'a';
362 chk_error(write(fds[1], &ch, 1));
363 wcount++;
364 }
365 }
366 }
367 chk_error(close(fds[0]));
368 chk_error(close(fds[1]));
369}
370
371static int thread1_res;
372static int thread2_res;
373
374static int thread1_func(void *arg)
375{
376 int i;
377 for(i=0;i<5;i++) {
378 thread1_res++;
379 usleep(10 * 1000);
380 }
381 return 0;
382}
383
384static int thread2_func(void *arg)
385{
386 int i;
387 for(i=0;i<6;i++) {
388 thread2_res++;
389 usleep(10 * 1000);
390 }
391 return 0;
392}
393
394static void wait_for_child(pid_t pid)
395{
396 int status;
397 chk_error(waitpid(pid, &status, 0));
398}
399
400
401
402
403static void test_clone(void)
404{
405 uint8_t *stack1, *stack2;
406 pid_t pid1, pid2;
407
408 stack1 = malloc(STACK_SIZE);
409 pid1 = chk_error(clone(thread1_func, stack1 + STACK_SIZE,
410 CLONE_VM | CLONE_FS | CLONE_FILES |
411 CLONE_SIGHAND | CLONE_THREAD | CLONE_SYSVSEM,
412 "hello1"));
413
414 stack2 = malloc(STACK_SIZE);
415 pid2 = chk_error(clone(thread2_func, stack2 + STACK_SIZE,
416 CLONE_VM | CLONE_FS | CLONE_FILES |
417 CLONE_SIGHAND | CLONE_THREAD | CLONE_SYSVSEM,
418 "hello2"));
419
420 wait_for_child(pid1);
421 free(stack1);
422 wait_for_child(pid2);
423 free(stack2);
424
425 if (thread1_res != 5 ||
426 thread2_res != 6)
427 error("clone");
428}
429
430
431
432volatile int alarm_count;
433jmp_buf jmp_env;
434
435static void sig_alarm(int sig)
436{
437 if (sig != SIGALRM)
438 error("signal");
439 alarm_count++;
440}
441
442static void sig_segv(int sig, siginfo_t *info, void *puc)
443{
444 if (sig != SIGSEGV)
445 error("signal");
446 longjmp(jmp_env, 1);
447}
448
449static void test_signal(void)
450{
451 struct sigaction act;
452 struct itimerval it, oit;
453
454
455
456 alarm_count = 0;
457
458 act.sa_handler = sig_alarm;
459 sigemptyset(&act.sa_mask);
460 act.sa_flags = 0;
461 chk_error(sigaction(SIGALRM, &act, NULL));
462
463 it.it_interval.tv_sec = 0;
464 it.it_interval.tv_usec = 10 * 1000;
465 it.it_value.tv_sec = 0;
466 it.it_value.tv_usec = 10 * 1000;
467 chk_error(setitimer(ITIMER_REAL, &it, NULL));
468 chk_error(getitimer(ITIMER_REAL, &oit));
469
470 while (alarm_count < 5) {
471 usleep(10 * 1000);
472 getitimer(ITIMER_REAL, &oit);
473 }
474
475 it.it_interval.tv_sec = 0;
476 it.it_interval.tv_usec = 0;
477 it.it_value.tv_sec = 0;
478 it.it_value.tv_usec = 0;
479 memset(&oit, 0xff, sizeof(oit));
480 chk_error(setitimer(ITIMER_REAL, &it, &oit));
481
482
483 act.sa_sigaction = sig_segv;
484 sigemptyset(&act.sa_mask);
485 act.sa_flags = SA_SIGINFO;
486 chk_error(sigaction(SIGSEGV, &act, NULL));
487 if (setjmp(jmp_env) == 0) {
488
489
490
491
492 *(volatile uint8_t *)0 = 0;
493 }
494
495 act.sa_handler = SIG_DFL;
496 sigemptyset(&act.sa_mask);
497 act.sa_flags = 0;
498 chk_error(sigaction(SIGSEGV, &act, NULL));
499
500 if (sigaction(SIGKILL, &act, NULL) == 0) {
501 error("sigaction(SIGKILL, &act, NULL) must not succeed");
502 }
503 if (sigaction(SIGSTOP, &act, NULL) == 0) {
504 error("sigaction(SIGSTOP, &act, NULL) must not succeed");
505 }
506 chk_error(sigaction(SIGKILL, NULL, &act));
507 chk_error(sigaction(SIGSTOP, NULL, &act));
508}
509
510#define SHM_SIZE 32768
511
512static void test_shm(void)
513{
514 void *ptr;
515 int shmid;
516
517 shmid = chk_error(shmget(IPC_PRIVATE, SHM_SIZE, IPC_CREAT | 0777));
518 ptr = shmat(shmid, NULL, 0);
519 if (ptr == (void *)-1) {
520 error("shmat");
521 }
522
523 memset(ptr, 0, SHM_SIZE);
524
525 chk_error(shmctl(shmid, IPC_RMID, 0));
526 chk_error(shmdt(ptr));
527}
528
529int main(int argc, char **argv)
530{
531 test_file();
532 test_pipe();
533 test_fork();
534 test_time();
535 test_socket();
536
537 if (argc > 1) {
538 printf("test_clone still considered buggy\n");
539 test_clone();
540 }
541
542 test_signal();
543 test_shm();
544 return 0;
545}
546
