1/* 2 * Copyright (c) 1998, 2017, 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 <unistd.h> 27#include <assert.h> 28#include <sys/types.h> 29#include <sys/time.h> 30#include <sys/stat.h> 31#ifdef MACOSX 32#include <sys/param.h> 33#include <sys/mount.h> 34#else 35#include <sys/statvfs.h> 36#endif 37#include <string.h> 38#include <stdlib.h> 39#include <dlfcn.h> 40#include <limits.h> 41 42#include "jni.h" 43#include "jni_util.h" 44#include "jlong.h" 45#include "jvm.h" 46#include "io_util.h" 47#include "io_util_md.h" 48#include "java_io_FileSystem.h" 49#include "java_io_UnixFileSystem.h" 50 51#if defined(_AIX) 52 #if !defined(NAME_MAX) 53 #define NAME_MAX MAXNAMLEN 54 #endif 55 #define DIR DIR64 56 #define opendir opendir64 57 #define closedir closedir64 58#endif 59 60#if defined(__solaris__) && !defined(NAME_MAX) 61 #define NAME_MAX MAXNAMLEN 62#endif 63 64#if defined(_ALLBSD_SOURCE) 65 #define dirent64 dirent 66 #define readdir64_r readdir_r 67 #define stat64 stat 68 #ifndef MACOSX 69 #define statvfs64 statvfs 70 #endif 71#endif 72 73/* -- Field IDs -- */ 74 75static struct { 76 jfieldID path; 77} ids; 78 79 80JNIEXPORT void JNICALL 81Java_java_io_UnixFileSystem_initIDs(JNIEnv *env, jclass cls) 82{ 83 jclass fileClass = (*env)->FindClass(env, "java/io/File"); 84 if (!fileClass) return; 85 ids.path = (*env)->GetFieldID(env, fileClass, 86 "path", "Ljava/lang/String;"); 87} 88 89/* -- Path operations -- */ 90 91extern int canonicalize(char *path, const char *out, int len); 92 93JNIEXPORT jstring JNICALL 94Java_java_io_UnixFileSystem_canonicalize0(JNIEnv *env, jobject this, 95 jstring pathname) 96{ 97 jstring rv = NULL; 98 99 WITH_PLATFORM_STRING(env, pathname, path) { 100 char canonicalPath[JVM_MAXPATHLEN]; 101 if (canonicalize((char *)path, 102 canonicalPath, JVM_MAXPATHLEN) < 0) { 103 JNU_ThrowIOExceptionWithLastError(env, "Bad pathname"); 104 } else { 105#ifdef MACOSX 106 rv = newStringPlatform(env, canonicalPath); 107#else 108 rv = JNU_NewStringPlatform(env, canonicalPath); 109#endif 110 } 111 } END_PLATFORM_STRING(env, path); 112 return rv; 113} 114 115 116/* -- Attribute accessors -- */ 117 118 119static jboolean 120statMode(const char *path, int *mode) 121{ 122 struct stat64 sb; 123 if (stat64(path, &sb) == 0) { 124 *mode = sb.st_mode; 125 return JNI_TRUE; 126 } 127 return JNI_FALSE; 128} 129 130 131JNIEXPORT jint JNICALL 132Java_java_io_UnixFileSystem_getBooleanAttributes0(JNIEnv *env, jobject this, 133 jobject file) 134{ 135 jint rv = 0; 136 137 WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) { 138 int mode; 139 if (statMode(path, &mode)) { 140 int fmt = mode & S_IFMT; 141 rv = (jint) (java_io_FileSystem_BA_EXISTS 142 | ((fmt == S_IFREG) ? java_io_FileSystem_BA_REGULAR : 0) 143 | ((fmt == S_IFDIR) ? java_io_FileSystem_BA_DIRECTORY : 0)); 144 } 145 } END_PLATFORM_STRING(env, path); 146 return rv; 147} 148 149JNIEXPORT jboolean JNICALL 150Java_java_io_UnixFileSystem_checkAccess(JNIEnv *env, jobject this, 151 jobject file, jint a) 152{ 153 jboolean rv = JNI_FALSE; 154 int mode = 0; 155 switch (a) { 156 case java_io_FileSystem_ACCESS_READ: 157 mode = R_OK; 158 break; 159 case java_io_FileSystem_ACCESS_WRITE: 160 mode = W_OK; 161 break; 162 case java_io_FileSystem_ACCESS_EXECUTE: 163 mode = X_OK; 164 break; 165 default: assert(0); 166 } 167 WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) { 168 if (access(path, mode) == 0) { 169 rv = JNI_TRUE; 170 } 171 } END_PLATFORM_STRING(env, path); 172 return rv; 173} 174 175 176JNIEXPORT jboolean JNICALL 177Java_java_io_UnixFileSystem_setPermission(JNIEnv *env, jobject this, 178 jobject file, 179 jint access, 180 jboolean enable, 181 jboolean owneronly) 182{ 183 jboolean rv = JNI_FALSE; 184 185 WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) { 186 int amode = 0; 187 int mode; 188 switch (access) { 189 case java_io_FileSystem_ACCESS_READ: 190 if (owneronly) 191 amode = S_IRUSR; 192 else 193 amode = S_IRUSR | S_IRGRP | S_IROTH; 194 break; 195 case java_io_FileSystem_ACCESS_WRITE: 196 if (owneronly) 197 amode = S_IWUSR; 198 else 199 amode = S_IWUSR | S_IWGRP | S_IWOTH; 200 break; 201 case java_io_FileSystem_ACCESS_EXECUTE: 202 if (owneronly) 203 amode = S_IXUSR; 204 else 205 amode = S_IXUSR | S_IXGRP | S_IXOTH; 206 break; 207 default: 208 assert(0); 209 } 210 if (statMode(path, &mode)) { 211 if (enable) 212 mode |= amode; 213 else 214 mode &= ~amode; 215 if (chmod(path, mode) >= 0) { 216 rv = JNI_TRUE; 217 } 218 } 219 } END_PLATFORM_STRING(env, path); 220 return rv; 221} 222 223JNIEXPORT jlong JNICALL 224Java_java_io_UnixFileSystem_getLastModifiedTime(JNIEnv *env, jobject this, 225 jobject file) 226{ 227 jlong rv = 0; 228 229 WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) { 230 struct stat64 sb; 231 if (stat64(path, &sb) == 0) { 232#if defined(_AIX) 233 rv = (jlong)sb.st_mtime * 1000; 234 rv += (jlong)sb.st_mtime_n / 1000000; 235#elif defined(MACOSX) 236 rv = (jlong)sb.st_mtimespec.tv_sec * 1000; 237 rv += (jlong)sb.st_mtimespec.tv_nsec / 1000000; 238#else 239 rv = (jlong)sb.st_mtim.tv_sec * 1000; 240 rv += (jlong)sb.st_mtim.tv_nsec / 1000000; 241#endif 242 } 243 } END_PLATFORM_STRING(env, path); 244 return rv; 245} 246 247 248JNIEXPORT jlong JNICALL 249Java_java_io_UnixFileSystem_getLength(JNIEnv *env, jobject this, 250 jobject file) 251{ 252 jlong rv = 0; 253 254 WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) { 255 struct stat64 sb; 256 if (stat64(path, &sb) == 0) { 257 rv = sb.st_size; 258 } 259 } END_PLATFORM_STRING(env, path); 260 return rv; 261} 262 263 264/* -- File operations -- */ 265 266 267JNIEXPORT jboolean JNICALL 268Java_java_io_UnixFileSystem_createFileExclusively(JNIEnv *env, jclass cls, 269 jstring pathname) 270{ 271 jboolean rv = JNI_FALSE; 272 273 WITH_PLATFORM_STRING(env, pathname, path) { 274 FD fd; 275 /* The root directory always exists */ 276 if (strcmp (path, "/")) { 277 fd = handleOpen(path, O_RDWR | O_CREAT | O_EXCL, 0666); 278 if (fd < 0) { 279 if (errno != EEXIST) 280 JNU_ThrowIOExceptionWithLastError(env, path); 281 } else { 282 if (close(fd) == -1) 283 JNU_ThrowIOExceptionWithLastError(env, path); 284 rv = JNI_TRUE; 285 } 286 } 287 } END_PLATFORM_STRING(env, path); 288 return rv; 289} 290 291 292JNIEXPORT jboolean JNICALL 293Java_java_io_UnixFileSystem_delete0(JNIEnv *env, jobject this, 294 jobject file) 295{ 296 jboolean rv = JNI_FALSE; 297 298 WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) { 299 if (remove(path) == 0) { 300 rv = JNI_TRUE; 301 } 302 } END_PLATFORM_STRING(env, path); 303 return rv; 304} 305 306 307JNIEXPORT jobjectArray JNICALL 308Java_java_io_UnixFileSystem_list(JNIEnv *env, jobject this, 309 jobject file) 310{ 311 DIR *dir = NULL; 312 struct dirent64 *ptr; 313 struct dirent64 *result; 314 int len, maxlen; 315 jobjectArray rv, old; 316 jclass str_class; 317 318 str_class = JNU_ClassString(env); 319 CHECK_NULL_RETURN(str_class, NULL); 320 321 WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) { 322 dir = opendir(path); 323 } END_PLATFORM_STRING(env, path); 324 if (dir == NULL) return NULL; 325 326 ptr = malloc(sizeof(struct dirent64) + (PATH_MAX + 1)); 327 if (ptr == NULL) { 328 JNU_ThrowOutOfMemoryError(env, "heap allocation failed"); 329 closedir(dir); 330 return NULL; 331 } 332 333 /* Allocate an initial String array */ 334 len = 0; 335 maxlen = 16; 336 rv = (*env)->NewObjectArray(env, maxlen, str_class, NULL); 337 if (rv == NULL) goto error; 338 339 /* Scan the directory */ 340 while ((readdir64_r(dir, ptr, &result) == 0) && (result != NULL)) { 341 jstring name; 342 if (!strcmp(ptr->d_name, ".") || !strcmp(ptr->d_name, "..")) 343 continue; 344 if (len == maxlen) { 345 old = rv; 346 rv = (*env)->NewObjectArray(env, maxlen <<= 1, str_class, NULL); 347 if (rv == NULL) goto error; 348 if (JNU_CopyObjectArray(env, rv, old, len) < 0) goto error; 349 (*env)->DeleteLocalRef(env, old); 350 } 351#ifdef MACOSX 352 name = newStringPlatform(env, ptr->d_name); 353#else 354 name = JNU_NewStringPlatform(env, ptr->d_name); 355#endif 356 if (name == NULL) goto error; 357 (*env)->SetObjectArrayElement(env, rv, len++, name); 358 (*env)->DeleteLocalRef(env, name); 359 } 360 closedir(dir); 361 free(ptr); 362 363 /* Copy the final results into an appropriately-sized array */ 364 old = rv; 365 rv = (*env)->NewObjectArray(env, len, str_class, NULL); 366 if (rv == NULL) { 367 return NULL; 368 } 369 if (JNU_CopyObjectArray(env, rv, old, len) < 0) { 370 return NULL; 371 } 372 return rv; 373 374 error: 375 closedir(dir); 376 free(ptr); 377 return NULL; 378} 379 380 381JNIEXPORT jboolean JNICALL 382Java_java_io_UnixFileSystem_createDirectory(JNIEnv *env, jobject this, 383 jobject file) 384{ 385 jboolean rv = JNI_FALSE; 386 387 WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) { 388 if (mkdir(path, 0777) == 0) { 389 rv = JNI_TRUE; 390 } 391 } END_PLATFORM_STRING(env, path); 392 return rv; 393} 394 395 396JNIEXPORT jboolean JNICALL 397Java_java_io_UnixFileSystem_rename0(JNIEnv *env, jobject this, 398 jobject from, jobject to) 399{ 400 jboolean rv = JNI_FALSE; 401 402 WITH_FIELD_PLATFORM_STRING(env, from, ids.path, fromPath) { 403 WITH_FIELD_PLATFORM_STRING(env, to, ids.path, toPath) { 404 if (rename(fromPath, toPath) == 0) { 405 rv = JNI_TRUE; 406 } 407 } END_PLATFORM_STRING(env, toPath); 408 } END_PLATFORM_STRING(env, fromPath); 409 return rv; 410} 411 412JNIEXPORT jboolean JNICALL 413Java_java_io_UnixFileSystem_setLastModifiedTime(JNIEnv *env, jobject this, 414 jobject file, jlong time) 415{ 416 jboolean rv = JNI_FALSE; 417 418 WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) { 419 struct stat64 sb; 420 421 if (stat64(path, &sb) == 0) { 422 struct timeval tv[2]; 423 424 /* Preserve access time */ 425#if defined(_AIX) 426 tv[0].tv_sec = sb.st_atime; 427 tv[0].tv_usec = sb.st_atime_n / 1000; 428#elif defined(MACOSX) 429 tv[0].tv_sec = sb.st_atimespec.tv_sec; 430 tv[0].tv_usec = sb.st_atimespec.tv_nsec / 1000; 431#else 432 tv[0].tv_sec = sb.st_atim.tv_sec; 433 tv[0].tv_usec = sb.st_atim.tv_nsec / 1000; 434#endif 435 /* Change last-modified time */ 436 tv[1].tv_sec = time / 1000; 437 tv[1].tv_usec = (time % 1000) * 1000; 438 439 if (utimes(path, tv) == 0) 440 rv = JNI_TRUE; 441 } 442 } END_PLATFORM_STRING(env, path); 443 444 return rv; 445} 446 447 448JNIEXPORT jboolean JNICALL 449Java_java_io_UnixFileSystem_setReadOnly(JNIEnv *env, jobject this, 450 jobject file) 451{ 452 jboolean rv = JNI_FALSE; 453 454 WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) { 455 int mode; 456 if (statMode(path, &mode)) { 457 if (chmod(path, mode & ~(S_IWUSR | S_IWGRP | S_IWOTH)) >= 0) { 458 rv = JNI_TRUE; 459 } 460 } 461 } END_PLATFORM_STRING(env, path); 462 return rv; 463} 464 465JNIEXPORT jlong JNICALL 466Java_java_io_UnixFileSystem_getSpace(JNIEnv *env, jobject this, 467 jobject file, jint t) 468{ 469 jlong rv = 0L; 470 471 WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) { 472#ifdef MACOSX 473 struct statfs fsstat; 474#else 475 struct statvfs64 fsstat; 476#endif 477 memset(&fsstat, 0, sizeof(fsstat)); 478#ifdef MACOSX 479 if (statfs(path, &fsstat) == 0) { 480 switch(t) { 481 case java_io_FileSystem_SPACE_TOTAL: 482 rv = jlong_mul(long_to_jlong(fsstat.f_bsize), 483 long_to_jlong(fsstat.f_blocks)); 484 break; 485 case java_io_FileSystem_SPACE_FREE: 486 rv = jlong_mul(long_to_jlong(fsstat.f_bsize), 487 long_to_jlong(fsstat.f_bfree)); 488 break; 489 case java_io_FileSystem_SPACE_USABLE: 490 rv = jlong_mul(long_to_jlong(fsstat.f_bsize), 491 long_to_jlong(fsstat.f_bavail)); 492 break; 493 default: 494 assert(0); 495 } 496 } 497#else 498 if (statvfs64(path, &fsstat) == 0) { 499 switch(t) { 500 case java_io_FileSystem_SPACE_TOTAL: 501 rv = jlong_mul(long_to_jlong(fsstat.f_frsize), 502 long_to_jlong(fsstat.f_blocks)); 503 break; 504 case java_io_FileSystem_SPACE_FREE: 505 rv = jlong_mul(long_to_jlong(fsstat.f_frsize), 506 long_to_jlong(fsstat.f_bfree)); 507 break; 508 case java_io_FileSystem_SPACE_USABLE: 509 rv = jlong_mul(long_to_jlong(fsstat.f_frsize), 510 long_to_jlong(fsstat.f_bavail)); 511 break; 512 default: 513 assert(0); 514 } 515 } 516#endif 517 } END_PLATFORM_STRING(env, path); 518 return rv; 519} 520 521JNIEXPORT jlong JNICALL 522Java_java_io_UnixFileSystem_getNameMax0(JNIEnv *env, jobject this, 523 jstring pathname) 524{ 525 jlong length = -1; 526 WITH_PLATFORM_STRING(env, pathname, path) { 527 length = (jlong)pathconf(path, _PC_NAME_MAX); 528 } END_PLATFORM_STRING(env, path); 529 return length != -1 ? length : (jlong)NAME_MAX; 530} 531