1 /*
2 * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <limits.h>
29 #include <fcntl.h>
30 #include <dirent.h>
31 #include <unistd.h>
32 #include <pwd.h>
33 #include <grp.h>
34 #include <errno.h>
35 #include <dlfcn.h>
36 #include <sys/types.h>
37 #include <sys/stat.h>
38 #include <sys/statvfs.h>
39 #include <sys/time.h>
40
41 #ifdef __solaris__
42 #include <strings.h>
43 #endif
44
45 #if defined(__linux__) || defined(_AIX)
46 #include <string.h>
47 #endif
48
49 #ifdef _ALLBSD_SOURCE
50 #include <string.h>
51
52 #define stat64 stat
53 #define statvfs64 statvfs
54
55 #define open64 open
56 #define fstat64 fstat
57 #define lstat64 lstat
58 #define dirent64 dirent
59 #define readdir64_r readdir_r
60 #endif
61
62 #include "jni.h"
63 #include "jni_util.h"
64 #include "jlong.h"
65
66 #include "sun_nio_fs_UnixNativeDispatcher.h"
67
68 /**
69 * Size of password or group entry when not available via sysconf
70 */
71 #define ENT_BUF_SIZE 1024
72
73 #define RESTARTABLE(_cmd, _result) do { \
74 do { \
75 _result = _cmd; \
76 } while((_result == -1) && (errno == EINTR)); \
77 } while(0)
78
79 #define RESTARTABLE_RETURN_PTR(_cmd, _result) do { \
80 do { \
81 _result = _cmd; \
82 } while((_result == NULL) && (errno == EINTR)); \
83 } while(0)
84
85 static jfieldID attrs_st_mode;
86 static jfieldID attrs_st_ino;
87 static jfieldID attrs_st_dev;
88 static jfieldID attrs_st_rdev;
89 static jfieldID attrs_st_nlink;
90 static jfieldID attrs_st_uid;
91 static jfieldID attrs_st_gid;
92 static jfieldID attrs_st_size;
93 static jfieldID attrs_st_atime_sec;
94 static jfieldID attrs_st_atime_nsec;
95 static jfieldID attrs_st_mtime_sec;
96 static jfieldID attrs_st_mtime_nsec;
97 static jfieldID attrs_st_ctime_sec;
98 static jfieldID attrs_st_ctime_nsec;
99
100 #ifdef _DARWIN_FEATURE_64_BIT_INODE
101 static jfieldID attrs_st_birthtime_sec;
102 #endif
103
104 static jfieldID attrs_f_frsize;
105 static jfieldID attrs_f_blocks;
106 static jfieldID attrs_f_bfree;
107 static jfieldID attrs_f_bavail;
108
109 static jfieldID entry_name;
110 static jfieldID entry_dir;
111 static jfieldID entry_fstype;
112 static jfieldID entry_options;
113 static jfieldID entry_dev;
114
115 /**
116 * System calls that may not be available at run time.
117 */
118 typedef int openat64_func(int, const char *, int, ...);
119 typedef int fstatat64_func(int, const char *, struct stat64 *, int);
120 typedef int unlinkat_func(int, const char*, int);
121 typedef int renameat_func(int, const char*, int, const char*);
122 typedef int futimesat_func(int, const char *, const struct timeval *);
123 typedef DIR* fdopendir_func(int);
124
125 static openat64_func* my_openat64_func = NULL;
126 static fstatat64_func* my_fstatat64_func = NULL;
127 static unlinkat_func* my_unlinkat_func = NULL;
128 static renameat_func* my_renameat_func = NULL;
129 static futimesat_func* my_futimesat_func = NULL;
130 static fdopendir_func* my_fdopendir_func = NULL;
131
132 /**
133 * fstatat missing from glibc on Linux. Temporary workaround
134 * for x86/x64.
135 */
136 #if defined(__linux__) && defined(__i386)
137 #define FSTATAT64_SYSCALL_AVAILABLE
138 static int fstatat64_wrapper(int dfd, const char *path,
139 struct stat64 *statbuf, int flag)
140 {
141 #ifndef __NR_fstatat64
142 #define __NR_fstatat64 300
143 #endif
144 return syscall(__NR_fstatat64, dfd, path, statbuf, flag);
145 }
146 #endif
147
148 #if defined(__linux__) && defined(__x86_64__)
149 #define FSTATAT64_SYSCALL_AVAILABLE
150 static int fstatat64_wrapper(int dfd, const char *path,
151 struct stat64 *statbuf, int flag)
152 {
153 #ifndef __NR_newfstatat
154 #define __NR_newfstatat 262
155 #endif
156 return syscall(__NR_newfstatat, dfd, path, statbuf, flag);
157 }
158 #endif
159
160 /**
161 * Call this to throw an internal UnixException when a system/library
162 * call fails
163 */
164 static void throwUnixException(JNIEnv* env, int errnum) {
165 jobject x = JNU_NewObjectByName(env, "sun/nio/fs/UnixException",
166 "(I)V", errnum);
167 if (x != NULL) {
168 (*env)->Throw(env, x);
169 }
170 }
171
172 /**
173 * Initialization
174 */
175 JNIEXPORT jint JNICALL
176 Java_sun_nio_fs_UnixNativeDispatcher_init(JNIEnv* env, jclass this)
177 {
178 jint capabilities = 0;
179 jclass clazz;
180
181 clazz = (*env)->FindClass(env, "sun/nio/fs/UnixFileAttributes");
182 CHECK_NULL_RETURN(clazz, 0);
183 attrs_st_mode = (*env)->GetFieldID(env, clazz, "st_mode", "I");
184 CHECK_NULL_RETURN(attrs_st_mode, 0);
185 attrs_st_ino = (*env)->GetFieldID(env, clazz, "st_ino", "J");
186 CHECK_NULL_RETURN(attrs_st_ino, 0);
187 attrs_st_dev = (*env)->GetFieldID(env, clazz, "st_dev", "J");
188 CHECK_NULL_RETURN(attrs_st_dev, 0);
189 attrs_st_rdev = (*env)->GetFieldID(env, clazz, "st_rdev", "J");
190 CHECK_NULL_RETURN(attrs_st_rdev, 0);
191 attrs_st_nlink = (*env)->GetFieldID(env, clazz, "st_nlink", "I");
192 CHECK_NULL_RETURN(attrs_st_nlink, 0);
193 attrs_st_uid = (*env)->GetFieldID(env, clazz, "st_uid", "I");
194 CHECK_NULL_RETURN(attrs_st_uid, 0);
195 attrs_st_gid = (*env)->GetFieldID(env, clazz, "st_gid", "I");
196 CHECK_NULL_RETURN(attrs_st_gid, 0);
197 attrs_st_size = (*env)->GetFieldID(env, clazz, "st_size", "J");
198 CHECK_NULL_RETURN(attrs_st_size, 0);
199 attrs_st_atime_sec = (*env)->GetFieldID(env, clazz, "st_atime_sec", "J");
200 CHECK_NULL_RETURN(attrs_st_atime_sec, 0);
201 attrs_st_atime_nsec = (*env)->GetFieldID(env, clazz, "st_atime_nsec", "J");
202 CHECK_NULL_RETURN(attrs_st_atime_nsec, 0);
203 attrs_st_mtime_sec = (*env)->GetFieldID(env, clazz, "st_mtime_sec", "J");
204 CHECK_NULL_RETURN(attrs_st_mtime_sec, 0);
205 attrs_st_mtime_nsec = (*env)->GetFieldID(env, clazz, "st_mtime_nsec", "J");
206 CHECK_NULL_RETURN(attrs_st_mtime_nsec, 0);
207 attrs_st_ctime_sec = (*env)->GetFieldID(env, clazz, "st_ctime_sec", "J");
208 CHECK_NULL_RETURN(attrs_st_ctime_sec, 0);
209 attrs_st_ctime_nsec = (*env)->GetFieldID(env, clazz, "st_ctime_nsec", "J");
210 CHECK_NULL_RETURN(attrs_st_ctime_nsec, 0);
211
212 #ifdef _DARWIN_FEATURE_64_BIT_INODE
213 attrs_st_birthtime_sec = (*env)->GetFieldID(env, clazz, "st_birthtime_sec", "J");
214 CHECK_NULL_RETURN(attrs_st_birthtime_sec, 0);
215 #endif
216
217 clazz = (*env)->FindClass(env, "sun/nio/fs/UnixFileStoreAttributes");
218 CHECK_NULL_RETURN(clazz, 0);
219 attrs_f_frsize = (*env)->GetFieldID(env, clazz, "f_frsize", "J");
220 CHECK_NULL_RETURN(attrs_f_frsize, 0);
221 attrs_f_blocks = (*env)->GetFieldID(env, clazz, "f_blocks", "J");
222 CHECK_NULL_RETURN(attrs_f_blocks, 0);
223 attrs_f_bfree = (*env)->GetFieldID(env, clazz, "f_bfree", "J");
224 CHECK_NULL_RETURN(attrs_f_bfree, 0);
225 attrs_f_bavail = (*env)->GetFieldID(env, clazz, "f_bavail", "J");
226 CHECK_NULL_RETURN(attrs_f_bavail, 0);
227
228 clazz = (*env)->FindClass(env, "sun/nio/fs/UnixMountEntry");
229 CHECK_NULL_RETURN(clazz, 0);
230 entry_name = (*env)->GetFieldID(env, clazz, "name", "[B");
231 CHECK_NULL_RETURN(entry_name, 0);
232 entry_dir = (*env)->GetFieldID(env, clazz, "dir", "[B");
233 CHECK_NULL_RETURN(entry_dir, 0);
234 entry_fstype = (*env)->GetFieldID(env, clazz, "fstype", "[B");
235 CHECK_NULL_RETURN(entry_fstype, 0);
236 entry_options = (*env)->GetFieldID(env, clazz, "opts", "[B");
237 CHECK_NULL_RETURN(entry_options, 0);
238 entry_dev = (*env)->GetFieldID(env, clazz, "dev", "J");
239 CHECK_NULL_RETURN(entry_dev, 0);
240
241 /* system calls that might not be available at run time */
242
243 #if (defined(__solaris__) && defined(_LP64)) || defined(_ALLBSD_SOURCE)
244 /* Solaris 64-bit does not have openat64/fstatat64 */
245 my_openat64_func = (openat64_func*)dlsym(RTLD_DEFAULT, "openat");
246 my_fstatat64_func = (fstatat64_func*)dlsym(RTLD_DEFAULT, "fstatat");
247 #else
248 my_openat64_func = (openat64_func*) dlsym(RTLD_DEFAULT, "openat64");
249 my_fstatat64_func = (fstatat64_func*) dlsym(RTLD_DEFAULT, "fstatat64");
250 #endif
251 my_unlinkat_func = (unlinkat_func*) dlsym(RTLD_DEFAULT, "unlinkat");
252 my_renameat_func = (renameat_func*) dlsym(RTLD_DEFAULT, "renameat");
253 my_futimesat_func = (futimesat_func*) dlsym(RTLD_DEFAULT, "futimesat");
254 my_fdopendir_func = (fdopendir_func*) dlsym(RTLD_DEFAULT, "fdopendir");
255
256 #if defined(FSTATAT64_SYSCALL_AVAILABLE)
257 /* fstatat64 missing from glibc */
258 if (my_fstatat64_func == NULL)
259 my_fstatat64_func = (fstatat64_func*)&fstatat64_wrapper;
260 #endif
261
262 /* supports futimes or futimesat */
263
264 #ifdef _ALLBSD_SOURCE
265 capabilities |= sun_nio_fs_UnixNativeDispatcher_SUPPORTS_FUTIMES;
266 #else
267 if (my_futimesat_func != NULL)
268 capabilities |= sun_nio_fs_UnixNativeDispatcher_SUPPORTS_FUTIMES;
269 #endif
270
271 /* supports openat, etc. */
272
273 if (my_openat64_func != NULL && my_fstatat64_func != NULL &&
274 my_unlinkat_func != NULL && my_renameat_func != NULL &&
275 my_futimesat_func != NULL && my_fdopendir_func != NULL)
276 {
277 capabilities |= sun_nio_fs_UnixNativeDispatcher_SUPPORTS_OPENAT;
278 }
279
280 /* supports file birthtime */
281
282 #ifdef _DARWIN_FEATURE_64_BIT_INODE
283 capabilities |= sun_nio_fs_UnixNativeDispatcher_SUPPORTS_BIRTHTIME;
284 #endif
285
286 return capabilities;
287 }
288
289 JNIEXPORT jbyteArray JNICALL
290 Java_sun_nio_fs_UnixNativeDispatcher_getcwd(JNIEnv* env, jclass this) {
291 jbyteArray result = NULL;
292 char buf[PATH_MAX+1];
293
294 /* EINTR not listed as a possible error */
295 char* cwd = getcwd(buf, sizeof(buf));
296 if (cwd == NULL) {
297 throwUnixException(env, errno);
298 } else {
299 jsize len = (jsize)strlen(buf);
300 result = (*env)->NewByteArray(env, len);
301 if (result != NULL) {
302 (*env)->SetByteArrayRegion(env, result, 0, len, (jbyte*)buf);
303 }
304 }
305 return result;
306 }
307
308 JNIEXPORT jbyteArray
309 Java_sun_nio_fs_UnixNativeDispatcher_strerror(JNIEnv* env, jclass this, jint error)
310 {
311 char* msg;
312 jsize len;
313 jbyteArray bytes;
314
315 #ifdef _AIX
316 /* strerror() is not thread-safe on AIX so we have to use strerror_r() */
317 char buffer[256];
318 msg = (strerror_r((int)error, buffer, 256) == 0) ? buffer : "Error while calling strerror_r";
319 #else
320 msg = strerror((int)error);
321 #endif
322 len = strlen(msg);
323 bytes = (*env)->NewByteArray(env, len);
324 if (bytes != NULL) {
325 (*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)msg);
326 }
327 return bytes;
328 }
329
330 JNIEXPORT jint
331 Java_sun_nio_fs_UnixNativeDispatcher_dup(JNIEnv* env, jclass this, jint fd) {
332
333 int res = -1;
334
335 RESTARTABLE(dup((int)fd), res);
336 if (res == -1) {
337 throwUnixException(env, errno);
338 }
339 return (jint)res;
340 }
341
342 JNIEXPORT jlong JNICALL
343 Java_sun_nio_fs_UnixNativeDispatcher_fopen0(JNIEnv* env, jclass this,
344 jlong pathAddress, jlong modeAddress)
345 {
346 FILE* fp = NULL;
347 const char* path = (const char*)jlong_to_ptr(pathAddress);
348 const char* mode = (const char*)jlong_to_ptr(modeAddress);
349
350 do {
351 fp = fopen(path, mode);
352 } while (fp == NULL && errno == EINTR);
353
354 if (fp == NULL) {
355 throwUnixException(env, errno);
356 }
357
358 return ptr_to_jlong(fp);
359 }
360
361 JNIEXPORT void JNICALL
362 Java_sun_nio_fs_UnixNativeDispatcher_fclose(JNIEnv* env, jclass this, jlong stream)
363 {
364 FILE* fp = jlong_to_ptr(stream);
365
366 if (fclose(fp) == EOF && errno != EINTR) {
367 throwUnixException(env, errno);
368 }
369 }
370
371 JNIEXPORT jint JNICALL
372 Java_sun_nio_fs_UnixNativeDispatcher_open0(JNIEnv* env, jclass this,
373 jlong pathAddress, jint oflags, jint mode)
374 {
375 jint fd;
376 const char* path = (const char*)jlong_to_ptr(pathAddress);
377
378 RESTARTABLE(open64(path, (int)oflags, (mode_t)mode), fd);
379 if (fd == -1) {
380 throwUnixException(env, errno);
381 }
382 return fd;
383 }
384
385 JNIEXPORT jint JNICALL
386 Java_sun_nio_fs_UnixNativeDispatcher_openat0(JNIEnv* env, jclass this, jint dfd,
387 jlong pathAddress, jint oflags, jint mode)
388 {
389 jint fd;
390 const char* path = (const char*)jlong_to_ptr(pathAddress);
391
392 if (my_openat64_func == NULL) {
393 JNU_ThrowInternalError(env, "should not reach here");
394 return -1;
395 }
396
397 RESTARTABLE((*my_openat64_func)(dfd, path, (int)oflags, (mode_t)mode), fd);
398 if (fd == -1) {
399 throwUnixException(env, errno);
400 }
401 return fd;
402 }
403
404 JNIEXPORT void JNICALL
405 Java_sun_nio_fs_UnixNativeDispatcher_close(JNIEnv* env, jclass this, jint fd) {
406 int err;
407 /* TDB - need to decide if EIO and other errors should cause exception */
408 RESTARTABLE(close((int)fd), err);
409 }
410
411 JNIEXPORT jint JNICALL
412 Java_sun_nio_fs_UnixNativeDispatcher_read(JNIEnv* env, jclass this, jint fd,
413 jlong address, jint nbytes)
414 {
415 ssize_t n;
416 void* bufp = jlong_to_ptr(address);
417 RESTARTABLE(read((int)fd, bufp, (size_t)nbytes), n);
418 if (n == -1) {
419 throwUnixException(env, errno);
420 }
421 return (jint)n;
422 }
423
424 JNIEXPORT jint JNICALL
425 Java_sun_nio_fs_UnixNativeDispatcher_write(JNIEnv* env, jclass this, jint fd,
426 jlong address, jint nbytes)
427 {
428 ssize_t n;
429 void* bufp = jlong_to_ptr(address);
430 RESTARTABLE(write((int)fd, bufp, (size_t)nbytes), n);
431 if (n == -1) {
432 throwUnixException(env, errno);
433 }
434 return (jint)n;
435 }
436
437 /**
438 * Copy stat64 members into sun.nio.fs.UnixFileAttributes
439 */
440 static void prepAttributes(JNIEnv* env, struct stat64* buf, jobject attrs) {
441 (*env)->SetIntField(env, attrs, attrs_st_mode, (jint)buf->st_mode);
442 (*env)->SetLongField(env, attrs, attrs_st_ino, (jlong)buf->st_ino);
443 (*env)->SetLongField(env, attrs, attrs_st_dev, (jlong)buf->st_dev);
444 (*env)->SetLongField(env, attrs, attrs_st_rdev, (jlong)buf->st_rdev);
445 (*env)->SetIntField(env, attrs, attrs_st_nlink, (jint)buf->st_nlink);
446 (*env)->SetIntField(env, attrs, attrs_st_uid, (jint)buf->st_uid);
447 (*env)->SetIntField(env, attrs, attrs_st_gid, (jint)buf->st_gid);
448 (*env)->SetLongField(env, attrs, attrs_st_size, (jlong)buf->st_size);
449 (*env)->SetLongField(env, attrs, attrs_st_atime_sec, (jlong)buf->st_atime);
450 (*env)->SetLongField(env, attrs, attrs_st_mtime_sec, (jlong)buf->st_mtime);
451 (*env)->SetLongField(env, attrs, attrs_st_ctime_sec, (jlong)buf->st_ctime);
452
453 #ifdef _DARWIN_FEATURE_64_BIT_INODE
454 (*env)->SetLongField(env, attrs, attrs_st_birthtime_sec, (jlong)buf->st_birthtime);
455 #endif
456
457 #if (_POSIX_C_SOURCE >= 200809L) || defined(__solaris__)
458 (*env)->SetLongField(env, attrs, attrs_st_atime_nsec, (jlong)buf->st_atim.tv_nsec);
459 (*env)->SetLongField(env, attrs, attrs_st_mtime_nsec, (jlong)buf->st_mtim.tv_nsec);
460 (*env)->SetLongField(env, attrs, attrs_st_ctime_nsec, (jlong)buf->st_ctim.tv_nsec);
461 #endif
462 }
463
464 JNIEXPORT void JNICALL
465 Java_sun_nio_fs_UnixNativeDispatcher_stat0(JNIEnv* env, jclass this,
466 jlong pathAddress, jobject attrs)
467 {
468 int err;
469 struct stat64 buf;
470 const char* path = (const char*)jlong_to_ptr(pathAddress);
471
472 RESTARTABLE(stat64(path, &buf), err);
473 if (err == -1) {
474 throwUnixException(env, errno);
475 } else {
476 prepAttributes(env, &buf, attrs);
477 }
478 }
479
480 JNIEXPORT void JNICALL
481 Java_sun_nio_fs_UnixNativeDispatcher_lstat0(JNIEnv* env, jclass this,
482 jlong pathAddress, jobject attrs)
483 {
484 int err;
485 struct stat64 buf;
486 const char* path = (const char*)jlong_to_ptr(pathAddress);
487
488 RESTARTABLE(lstat64(path, &buf), err);
489 if (err == -1) {
490 throwUnixException(env, errno);
491 } else {
492 prepAttributes(env, &buf, attrs);
493 }
494 }
495
496 JNIEXPORT void JNICALL
497 Java_sun_nio_fs_UnixNativeDispatcher_fstat(JNIEnv* env, jclass this, jint fd,
498 jobject attrs)
499 {
500 int err;
501 struct stat64 buf;
502
503 RESTARTABLE(fstat64((int)fd, &buf), err);
504 if (err == -1) {
505 throwUnixException(env, errno);
506 } else {
507 prepAttributes(env, &buf, attrs);
508 }
509 }
510
511 JNIEXPORT void JNICALL
512 Java_sun_nio_fs_UnixNativeDispatcher_fstatat0(JNIEnv* env, jclass this, jint dfd,
513 jlong pathAddress, jint flag, jobject attrs)
514 {
515 int err;
516 struct stat64 buf;
517 const char* path = (const char*)jlong_to_ptr(pathAddress);
518
519 if (my_fstatat64_func == NULL) {
520 JNU_ThrowInternalError(env, "should not reach here");
521 return;
522 }
523 RESTARTABLE((*my_fstatat64_func)((int)dfd, path, &buf, (int)flag), err);
524 if (err == -1) {
525 throwUnixException(env, errno);
526 } else {
527 prepAttributes(env, &buf, attrs);
528 }
529 }
530
531 JNIEXPORT void JNICALL
532 Java_sun_nio_fs_UnixNativeDispatcher_chmod0(JNIEnv* env, jclass this,
533 jlong pathAddress, jint mode)
534 {
535 int err;
536 const char* path = (const char*)jlong_to_ptr(pathAddress);
537
538 RESTARTABLE(chmod(path, (mode_t)mode), err);
539 if (err == -1) {
540 throwUnixException(env, errno);
541 }
542 }
543
544 JNIEXPORT void JNICALL
545 Java_sun_nio_fs_UnixNativeDispatcher_fchmod(JNIEnv* env, jclass this, jint filedes,
546 jint mode)
547 {
548 int err;
549
550 RESTARTABLE(fchmod((int)filedes, (mode_t)mode), err);
551 if (err == -1) {
552 throwUnixException(env, errno);
553 }
554 }
555
556
557 JNIEXPORT void JNICALL
558 Java_sun_nio_fs_UnixNativeDispatcher_chown0(JNIEnv* env, jclass this,
559 jlong pathAddress, jint uid, jint gid)
560 {
561 int err;
562 const char* path = (const char*)jlong_to_ptr(pathAddress);
563
564 RESTARTABLE(chown(path, (uid_t)uid, (gid_t)gid), err);
565 if (err == -1) {
566 throwUnixException(env, errno);
567 }
568 }
569
570 JNIEXPORT void JNICALL
571 Java_sun_nio_fs_UnixNativeDispatcher_lchown0(JNIEnv* env, jclass this, jlong pathAddress, jint uid, jint gid)
572 {
573 int err;
574 const char* path = (const char*)jlong_to_ptr(pathAddress);
575
576 RESTARTABLE(lchown(path, (uid_t)uid, (gid_t)gid), err);
577 if (err == -1) {
578 throwUnixException(env, errno);
579 }
580 }
581
582 JNIEXPORT void JNICALL
583 Java_sun_nio_fs_UnixNativeDispatcher_fchown(JNIEnv* env, jclass this, jint filedes, jint uid, jint gid)
584 {
585 int err;
586
587 RESTARTABLE(fchown(filedes, (uid_t)uid, (gid_t)gid), err);
588 if (err == -1) {
589 throwUnixException(env, errno);
590 }
591 }
592
593 JNIEXPORT void JNICALL
594 Java_sun_nio_fs_UnixNativeDispatcher_utimes0(JNIEnv* env, jclass this,
595 jlong pathAddress, jlong accessTime, jlong modificationTime)
596 {
597 int err;
598 struct timeval times[2];
599 const char* path = (const char*)jlong_to_ptr(pathAddress);
600
601 times[0].tv_sec = accessTime / 1000000;
602 times[0].tv_usec = accessTime % 1000000;
603
604 times[1].tv_sec = modificationTime / 1000000;
605 times[1].tv_usec = modificationTime % 1000000;
606
607 RESTARTABLE(utimes(path, ×[0]), err);
608 if (err == -1) {
609 throwUnixException(env, errno);
610 }
611 }
612
613 JNIEXPORT void JNICALL
614 Java_sun_nio_fs_UnixNativeDispatcher_futimes(JNIEnv* env, jclass this, jint filedes,
615 jlong accessTime, jlong modificationTime)
616 {
617 struct timeval times[2];
618 int err = 0;
619
620 times[0].tv_sec = accessTime / 1000000;
621 times[0].tv_usec = accessTime % 1000000;
622
623 times[1].tv_sec = modificationTime / 1000000;
624 times[1].tv_usec = modificationTime % 1000000;
625
626 #ifdef _ALLBSD_SOURCE
627 RESTARTABLE(futimes(filedes, ×[0]), err);
628 #else
629 if (my_futimesat_func == NULL) {
630 JNU_ThrowInternalError(env, "my_ftimesat_func is NULL");
631 return;
632 }
633 RESTARTABLE((*my_futimesat_func)(filedes, NULL, ×[0]), err);
634 #endif
635 if (err == -1) {
636 throwUnixException(env, errno);
637 }
638 }
639
640 JNIEXPORT jlong JNICALL
641 Java_sun_nio_fs_UnixNativeDispatcher_opendir0(JNIEnv* env, jclass this,
642 jlong pathAddress)
643 {
644 DIR* dir;
645 const char* path = (const char*)jlong_to_ptr(pathAddress);
646
647 /* EINTR not listed as a possible error */
648 dir = opendir(path);
649 if (dir == NULL) {
650 throwUnixException(env, errno);
651 }
652 return ptr_to_jlong(dir);
653 }
654
655 JNIEXPORT jlong JNICALL
656 Java_sun_nio_fs_UnixNativeDispatcher_fdopendir(JNIEnv* env, jclass this, int dfd) {
657 DIR* dir;
658
659 if (my_fdopendir_func == NULL) {
660 JNU_ThrowInternalError(env, "should not reach here");
661 return (jlong)-1;
662 }
663
664 /* EINTR not listed as a possible error */
665 dir = (*my_fdopendir_func)((int)dfd);
666 if (dir == NULL) {
667 throwUnixException(env, errno);
668 }
669 return ptr_to_jlong(dir);
670 }
671
672 JNIEXPORT void JNICALL
673 Java_sun_nio_fs_UnixNativeDispatcher_closedir(JNIEnv* env, jclass this, jlong dir) {
674 DIR* dirp = jlong_to_ptr(dir);
675
676 if (closedir(dirp) == -1 && errno != EINTR) {
677 throwUnixException(env, errno);
678 }
679 }
680
681 JNIEXPORT jbyteArray JNICALL
682 Java_sun_nio_fs_UnixNativeDispatcher_readdir(JNIEnv* env, jclass this, jlong value) {
683 struct dirent64* result;
684 struct {
685 struct dirent64 buf;
686 char name_extra[PATH_MAX + 1 - sizeof result->d_name];
687 } entry;
688 struct dirent64* ptr = &entry.buf;
689 int res;
690 DIR* dirp = jlong_to_ptr(value);
691
692 /* EINTR not listed as a possible error */
693 /* TDB: reentrant version probably not required here */
694 res = readdir64_r(dirp, ptr, &result);
695
696 #ifdef _AIX
697 /* On AIX, readdir_r() returns EBADF (i.e. '9') and sets 'result' to NULL for the */
698 /* directory stream end. Otherwise, 'errno' will contain the error code. */
699 if (res != 0) {
700 res = (result == NULL && res == EBADF) ? 0 : errno;
701 }
702 #endif
703
704 if (res != 0) {
705 throwUnixException(env, res);
706 return NULL;
707 } else {
708 if (result == NULL) {
709 return NULL;
710 } else {
711 jsize len = strlen(ptr->d_name);
712 jbyteArray bytes = (*env)->NewByteArray(env, len);
713 if (bytes != NULL) {
714 (*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)(ptr->d_name));
715 }
716 return bytes;
717 }
718 }
719 }
720
721 JNIEXPORT void JNICALL
722 Java_sun_nio_fs_UnixNativeDispatcher_mkdir0(JNIEnv* env, jclass this,
723 jlong pathAddress, jint mode)
724 {
725 const char* path = (const char*)jlong_to_ptr(pathAddress);
726
727 /* EINTR not listed as a possible error */
728 if (mkdir(path, (mode_t)mode) == -1) {
729 throwUnixException(env, errno);
730 }
731 }
732
733 JNIEXPORT void JNICALL
734 Java_sun_nio_fs_UnixNativeDispatcher_rmdir0(JNIEnv* env, jclass this,
735 jlong pathAddress)
736 {
737 const char* path = (const char*)jlong_to_ptr(pathAddress);
738
739 /* EINTR not listed as a possible error */
740 if (rmdir(path) == -1) {
741 throwUnixException(env, errno);
742 }
743 }
744
745 JNIEXPORT void JNICALL
746 Java_sun_nio_fs_UnixNativeDispatcher_link0(JNIEnv* env, jclass this,
747 jlong existingAddress, jlong newAddress)
748 {
749 int err;
750 const char* existing = (const char*)jlong_to_ptr(existingAddress);
751 const char* newname = (const char*)jlong_to_ptr(newAddress);
752
753 RESTARTABLE(link(existing, newname), err);
754 if (err == -1) {
755 throwUnixException(env, errno);
756 }
757 }
758
759
760 JNIEXPORT void JNICALL
761 Java_sun_nio_fs_UnixNativeDispatcher_unlink0(JNIEnv* env, jclass this,
762 jlong pathAddress)
763 {
764 const char* path = (const char*)jlong_to_ptr(pathAddress);
765
766 /* EINTR not listed as a possible error */
767 if (unlink(path) == -1) {
768 throwUnixException(env, errno);
769 }
770 }
771
772 JNIEXPORT void JNICALL
773 Java_sun_nio_fs_UnixNativeDispatcher_unlinkat0(JNIEnv* env, jclass this, jint dfd,
774 jlong pathAddress, jint flags)
775 {
776 const char* path = (const char*)jlong_to_ptr(pathAddress);
777
778 if (my_unlinkat_func == NULL) {
779 JNU_ThrowInternalError(env, "should not reach here");
780 return;
781 }
782
783 /* EINTR not listed as a possible error */
784 if ((*my_unlinkat_func)((int)dfd, path, (int)flags) == -1) {
785 throwUnixException(env, errno);
786 }
787 }
788
789 JNIEXPORT void JNICALL
790 Java_sun_nio_fs_UnixNativeDispatcher_rename0(JNIEnv* env, jclass this,
791 jlong fromAddress, jlong toAddress)
792 {
793 const char* from = (const char*)jlong_to_ptr(fromAddress);
794 const char* to = (const char*)jlong_to_ptr(toAddress);
795
796 /* EINTR not listed as a possible error */
797 if (rename(from, to) == -1) {
798 throwUnixException(env, errno);
799 }
800 }
801
802 JNIEXPORT void JNICALL
803 Java_sun_nio_fs_UnixNativeDispatcher_renameat0(JNIEnv* env, jclass this,
804 jint fromfd, jlong fromAddress, jint tofd, jlong toAddress)
805 {
806 const char* from = (const char*)jlong_to_ptr(fromAddress);
807 const char* to = (const char*)jlong_to_ptr(toAddress);
808
809 if (my_renameat_func == NULL) {
810 JNU_ThrowInternalError(env, "should not reach here");
811 return;
812 }
813
814 /* EINTR not listed as a possible error */
815 if ((*my_renameat_func)((int)fromfd, from, (int)tofd, to) == -1) {
816 throwUnixException(env, errno);
817 }
818 }
819
820 JNIEXPORT void JNICALL
821 Java_sun_nio_fs_UnixNativeDispatcher_symlink0(JNIEnv* env, jclass this,
822 jlong targetAddress, jlong linkAddress)
823 {
824 const char* target = (const char*)jlong_to_ptr(targetAddress);
825 const char* link = (const char*)jlong_to_ptr(linkAddress);
826
827 /* EINTR not listed as a possible error */
828 if (symlink(target, link) == -1) {
829 throwUnixException(env, errno);
830 }
831 }
832
833 JNIEXPORT jbyteArray JNICALL
834 Java_sun_nio_fs_UnixNativeDispatcher_readlink0(JNIEnv* env, jclass this,
835 jlong pathAddress)
836 {
837 jbyteArray result = NULL;
838 char target[PATH_MAX+1];
839 const char* path = (const char*)jlong_to_ptr(pathAddress);
840
841 /* EINTR not listed as a possible error */
842 int n = readlink(path, target, sizeof(target));
843 if (n == -1) {
844 throwUnixException(env, errno);
845 } else {
846 jsize len;
847 if (n == sizeof(target)) {
848 n--;
849 }
850 target[n] = '\0';
851 len = (jsize)strlen(target);
852 result = (*env)->NewByteArray(env, len);
853 if (result != NULL) {
854 (*env)->SetByteArrayRegion(env, result, 0, len, (jbyte*)target);
855 }
856 }
857 return result;
858 }
859
860 JNIEXPORT jbyteArray JNICALL
861 Java_sun_nio_fs_UnixNativeDispatcher_realpath0(JNIEnv* env, jclass this,
862 jlong pathAddress)
863 {
864 jbyteArray result = NULL;
865 char resolved[PATH_MAX+1];
866 const char* path = (const char*)jlong_to_ptr(pathAddress);
867
868 /* EINTR not listed as a possible error */
869 if (realpath(path, resolved) == NULL) {
870 throwUnixException(env, errno);
871 } else {
872 jsize len = (jsize)strlen(resolved);
873 result = (*env)->NewByteArray(env, len);
874 if (result != NULL) {
875 (*env)->SetByteArrayRegion(env, result, 0, len, (jbyte*)resolved);
876 }
877 }
878 return result;
879 }
880
881 JNIEXPORT void JNICALL
882 Java_sun_nio_fs_UnixNativeDispatcher_access0(JNIEnv* env, jclass this,
883 jlong pathAddress, jint amode)
884 {
885 int err;
886 const char* path = (const char*)jlong_to_ptr(pathAddress);
887
888 RESTARTABLE(access(path, (int)amode), err);
889 if (err == -1) {
890 throwUnixException(env, errno);
891 }
892 }
893
894 JNIEXPORT void JNICALL
895 Java_sun_nio_fs_UnixNativeDispatcher_statvfs0(JNIEnv* env, jclass this,
896 jlong pathAddress, jobject attrs)
897 {
898 int err;
899 struct statvfs64 buf;
900 const char* path = (const char*)jlong_to_ptr(pathAddress);
901
902
903 RESTARTABLE(statvfs64(path, &buf), err);
904 if (err == -1) {
905 throwUnixException(env, errno);
906 } else {
907 #ifdef _AIX
908 /* AIX returns ULONG_MAX in buf.f_blocks for the /proc file system. */
909 /* This is too big for a Java signed long and fools various tests. */
910 if (buf.f_blocks == ULONG_MAX) {
911 buf.f_blocks = 0;
912 }
913 /* The number of free or available blocks can never exceed the total number of blocks */
914 if (buf.f_blocks == 0) {
915 buf.f_bfree = 0;
916 buf.f_bavail = 0;
917 }
918 #endif
919 (*env)->SetLongField(env, attrs, attrs_f_frsize, long_to_jlong(buf.f_frsize));
920 (*env)->SetLongField(env, attrs, attrs_f_blocks, long_to_jlong(buf.f_blocks));
921 (*env)->SetLongField(env, attrs, attrs_f_bfree, long_to_jlong(buf.f_bfree));
922 (*env)->SetLongField(env, attrs, attrs_f_bavail, long_to_jlong(buf.f_bavail));
923 }
924 }
925
926 JNIEXPORT jlong JNICALL
927 Java_sun_nio_fs_UnixNativeDispatcher_pathconf0(JNIEnv* env, jclass this,
928 jlong pathAddress, jint name)
929 {
930 long err;
931 const char* path = (const char*)jlong_to_ptr(pathAddress);
932
933 err = pathconf(path, (int)name);
934 if (err == -1) {
935 throwUnixException(env, errno);
936 }
937 return (jlong)err;
938 }
939
940 JNIEXPORT jlong JNICALL
941 Java_sun_nio_fs_UnixNativeDispatcher_fpathconf(JNIEnv* env, jclass this,
942 jint fd, jint name)
943 {
944 long err;
945
946 err = fpathconf((int)fd, (int)name);
947 if (err == -1) {
948 throwUnixException(env, errno);
949 }
950 return (jlong)err;
951 }
952
953 JNIEXPORT void JNICALL
954 Java_sun_nio_fs_UnixNativeDispatcher_mknod0(JNIEnv* env, jclass this,
955 jlong pathAddress, jint mode, jlong dev)
956 {
957 int err;
958 const char* path = (const char*)jlong_to_ptr(pathAddress);
959
960 RESTARTABLE(mknod(path, (mode_t)mode, (dev_t)dev), err);
961 if (err == -1) {
962 throwUnixException(env, errno);
963 }
964 }
965
966 JNIEXPORT jbyteArray JNICALL
967 Java_sun_nio_fs_UnixNativeDispatcher_getpwuid(JNIEnv* env, jclass this, jint uid)
968 {
969 jbyteArray result = NULL;
970 int buflen;
971 char* pwbuf;
972
973 /* allocate buffer for password record */
974 buflen = (int)sysconf(_SC_GETPW_R_SIZE_MAX);
975 if (buflen == -1)
976 buflen = ENT_BUF_SIZE;
977 pwbuf = (char*)malloc(buflen);
978 if (pwbuf == NULL) {
979 JNU_ThrowOutOfMemoryError(env, "native heap");
980 } else {
981 struct passwd pwent;
982 struct passwd* p = NULL;
983 int res = 0;
984
985 errno = 0;
986 #ifdef __solaris__
987 RESTARTABLE_RETURN_PTR(getpwuid_r((uid_t)uid, &pwent, pwbuf, (size_t)buflen), p);
988 #else
989 RESTARTABLE(getpwuid_r((uid_t)uid, &pwent, pwbuf, (size_t)buflen, &p), res);
990 #endif
991
992 if (res != 0 || p == NULL || p->pw_name == NULL || *(p->pw_name) == '\0') {
993 /* not found or error */
994 if (errno == 0)
995 errno = ENOENT;
996 throwUnixException(env, errno);
997 } else {
998 jsize len = strlen(p->pw_name);
999 result = (*env)->NewByteArray(env, len);
1000 if (result != NULL) {
1001 (*env)->SetByteArrayRegion(env, result, 0, len, (jbyte*)(p->pw_name));
1002 }
1003 }
1004 free(pwbuf);
1005 }
1006
1007 return result;
1008 }
1009
1010
1011 JNIEXPORT jbyteArray JNICALL
1012 Java_sun_nio_fs_UnixNativeDispatcher_getgrgid(JNIEnv* env, jclass this, jint gid)
1013 {
1014 jbyteArray result = NULL;
1015 int buflen;
1016 int retry;
1017
1018 /* initial size of buffer for group record */
1019 buflen = (int)sysconf(_SC_GETGR_R_SIZE_MAX);
1020 if (buflen == -1)
1021 buflen = ENT_BUF_SIZE;
1022
1023 do {
1024 struct group grent;
1025 struct group* g = NULL;
1026 int res = 0;
1027
1028 char* grbuf = (char*)malloc(buflen);
1029 if (grbuf == NULL) {
1030 JNU_ThrowOutOfMemoryError(env, "native heap");
1031 return NULL;
1032 }
1033
1034 errno = 0;
1035 #ifdef __solaris__
1036 RESTARTABLE_RETURN_PTR(getgrgid_r((gid_t)gid, &grent, grbuf, (size_t)buflen), g);
1037 #else
1038 RESTARTABLE(getgrgid_r((gid_t)gid, &grent, grbuf, (size_t)buflen, &g), res);
1039 #endif
1040
1041 retry = 0;
1042 if (res != 0 || g == NULL || g->gr_name == NULL || *(g->gr_name) == '\0') {
1043 /* not found or error */
1044 if (errno == ERANGE) {
1045 /* insufficient buffer size so need larger buffer */
1046 buflen += ENT_BUF_SIZE;
1047 retry = 1;
1048 } else {
1049 if (errno == 0)
1050 errno = ENOENT;
1051 throwUnixException(env, errno);
1052 }
1053 } else {
1054 jsize len = strlen(g->gr_name);
1055 result = (*env)->NewByteArray(env, len);
1056 if (result != NULL) {
1057 (*env)->SetByteArrayRegion(env, result, 0, len, (jbyte*)(g->gr_name));
1058 }
1059 }
1060
1061 free(grbuf);
1062
1063 } while (retry);
1064
1065 return result;
1066 }
1067
1068 JNIEXPORT jint JNICALL
1069 Java_sun_nio_fs_UnixNativeDispatcher_getpwnam0(JNIEnv* env, jclass this,
1070 jlong nameAddress)
1071 {
1072 jint uid = -1;
1073 int buflen;
1074 char* pwbuf;
1075
1076 /* allocate buffer for password record */
1077 buflen = (int)sysconf(_SC_GETPW_R_SIZE_MAX);
1078 if (buflen == -1)
1079 buflen = ENT_BUF_SIZE;
1080 pwbuf = (char*)malloc(buflen);
1081 if (pwbuf == NULL) {
1082 JNU_ThrowOutOfMemoryError(env, "native heap");
1083 } else {
1084 struct passwd pwent;
1085 struct passwd* p = NULL;
1086 int res = 0;
1087 const char* name = (const char*)jlong_to_ptr(nameAddress);
1088
1089 errno = 0;
1090 #ifdef __solaris__
1091 RESTARTABLE_RETURN_PTR(getpwnam_r(name, &pwent, pwbuf, (size_t)buflen), p);
1092 #else
1093 RESTARTABLE(getpwnam_r(name, &pwent, pwbuf, (size_t)buflen, &p), res);
1094 #endif
1095
1096 if (res != 0 || p == NULL || p->pw_name == NULL || *(p->pw_name) == '\0') {
1097 /* not found or error */
1098 if (errno != 0 && errno != ENOENT && errno != ESRCH)
1099 throwUnixException(env, errno);
1100 } else {
1101 uid = p->pw_uid;
1102 }
1103 free(pwbuf);
1104 }
1105
1106 return uid;
1107 }
1108
1109 JNIEXPORT jint JNICALL
1110 Java_sun_nio_fs_UnixNativeDispatcher_getgrnam0(JNIEnv* env, jclass this,
1111 jlong nameAddress)
1112 {
1113 jint gid = -1;
1114 int buflen, retry;
1115
1116 /* initial size of buffer for group record */
1117 buflen = (int)sysconf(_SC_GETGR_R_SIZE_MAX);
1118 if (buflen == -1)
1119 buflen = ENT_BUF_SIZE;
1120
1121 do {
1122 struct group grent;
1123 struct group* g = NULL;
1124 int res = 0;
1125 char *grbuf;
1126 const char* name = (const char*)jlong_to_ptr(nameAddress);
1127
1128 grbuf = (char*)malloc(buflen);
1129 if (grbuf == NULL) {
1130 JNU_ThrowOutOfMemoryError(env, "native heap");
1131 return -1;
1132 }
1133
1134 errno = 0;
1135 #ifdef __solaris__
1136 RESTARTABLE_RETURN_PTR(getgrnam_r(name, &grent, grbuf, (size_t)buflen), g);
1137 #else
1138 RESTARTABLE(getgrnam_r(name, &grent, grbuf, (size_t)buflen, &g), res);
1139 #endif
1140
1141 retry = 0;
1142 if (res != 0 || g == NULL || g->gr_name == NULL || *(g->gr_name) == '\0') {
1143 /* not found or error */
1144 if (errno != 0 && errno != ENOENT && errno != ESRCH) {
1145 if (errno == ERANGE) {
1146 /* insufficient buffer size so need larger buffer */
1147 buflen += ENT_BUF_SIZE;
1148 retry = 1;
1149 } else {
1150 throwUnixException(env, errno);
1151 }
1152 }
1153 } else {
1154 gid = g->gr_gid;
1155 }
1156
1157 free(grbuf);
1158
1159 } while (retry);
1160
1161 return gid;
1162 }