1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #define LOG_TAG "Posix" 18 19 #include "AsynchronousCloseMonitor.h" 20 #include "cutils/log.h" 21 #include "ExecStrings.h" 22 #include "JNIHelp.h" 23 #include "JniConstants.h" 24 #include "JniException.h" 25 #include "NetworkUtilities.h" 26 #include "Portability.h" 27 #include "readlink.h" 28 #include "../../bionic/libc/dns/include/resolv_netid.h" // For android_getaddrinfofornet. 29 #include "ScopedBytes.h" 30 #include "ScopedLocalRef.h" 31 #include "ScopedPrimitiveArray.h" 32 #include "ScopedUtfChars.h" 33 #include "toStringArray.h" 34 #include "UniquePtr.h" 35 36 #include <arpa/inet.h> 37 #include <errno.h> 38 #include <fcntl.h> 39 #include <net/if.h> 40 #include <netdb.h> 41 #include <netinet/in.h> 42 #include <poll.h> 43 #include <pwd.h> 44 #include <signal.h> 45 #include <stdlib.h> 46 #include <sys/ioctl.h> 47 #include <sys/mman.h> 48 #ifndef __APPLE__ 49 #include <sys/prctl.h> 50 #endif 51 #include <sys/socket.h> 52 #include <sys/stat.h> 53 #ifdef __APPLE__ 54 #include <sys/statvfs.h> 55 #endif 56 #include <sys/syscall.h> 57 #include <sys/time.h> 58 #include <sys/types.h> 59 #include <sys/uio.h> 60 #include <sys/utsname.h> 61 #include <sys/wait.h> 62 #include <termios.h> 63 #include <unistd.h> 64 65 66 #ifndef __unused 67 #define __unused __attribute__((__unused__)) 68 #endif 69 70 #define TO_JAVA_STRING(NAME, EXP) \ 71 jstring NAME = env->NewStringUTF(EXP); \ 72 if (NAME == NULL) return NULL; 73 74 struct addrinfo_deleter { 75 void operator()(addrinfo* p) const { 76 if (p != NULL) { // bionic's freeaddrinfo(3) crashes when passed NULL. 77 freeaddrinfo(p); 78 } 79 } 80 }; 81 82 /** 83 * Used to retry networking system calls that can be interrupted with a signal. Unlike 84 * TEMP_FAILURE_RETRY, this also handles the case where 85 * AsynchronousCloseMonitor::signalBlockedThreads(fd) is used to signal a close() or 86 * Thread.interrupt(). Other signals that result in an EINTR result are ignored and the system call 87 * is retried. 88 * 89 * Returns the result of the system call though a Java exception will be pending if the result is 90 * -1: a SocketException if signaled via AsynchronousCloseMonitor, or ErrnoException for other 91 * failures. 92 */ 93 #define NET_FAILURE_RETRY(jni_env, return_type, syscall_name, java_fd, ...) ({ \ 94 return_type _rc = -1; \ 95 do { \ 96 bool _wasSignaled; \ 97 int _syscallErrno; \ 98 { \ 99 int _fd = jniGetFDFromFileDescriptor(jni_env, java_fd); \ 100 AsynchronousCloseMonitor _monitor(_fd); \ 101 _rc = syscall_name(_fd, __VA_ARGS__); \ 102 _syscallErrno = errno; \ 103 _wasSignaled = _monitor.wasSignaled(); \ 104 } \ 105 if (_wasSignaled) { \ 106 jniThrowException(jni_env, "java/net/SocketException", "Socket closed"); \ 107 _rc = -1; \ 108 break; \ 109 } \ 110 if (_rc == -1 && _syscallErrno != EINTR) { \ 111 /* TODO: with a format string we could show the arguments too, like strace(1). */ \ 112 throwErrnoException(jni_env, # syscall_name); \ 113 break; \ 114 } \ 115 } while (_rc == -1); /* _syscallErrno == EINTR && !_wasSignaled */ \ 116 _rc; }) 117 118 /** 119 * Used to retry system calls that can be interrupted with a signal. Unlike TEMP_FAILURE_RETRY, this 120 * also handles the case where AsynchronousCloseMonitor::signalBlockedThreads(fd) is used to signal 121 * a close() or Thread.interrupt(). Other signals that result in an EINTR result are ignored and the 122 * system call is retried. 123 * 124 * Returns the result of the system call though a Java exception will be pending if the result is 125 * -1: an IOException if the file descriptor is already closed, a InterruptedIOException if signaled 126 * via AsynchronousCloseMonitor, or ErrnoException for other failures. 127 */ 128 #define IO_FAILURE_RETRY(jni_env, return_type, syscall_name, java_fd, ...) ({ \ 129 return_type _rc = -1; \ 130 do { \ 131 bool _wasSignaled; \ 132 int _syscallErrno; \ 133 { \ 134 int _fd = jniGetFDFromFileDescriptor(jni_env, java_fd); \ 135 AsynchronousCloseMonitor _monitor(_fd); \ 136 _rc = syscall_name(_fd, __VA_ARGS__); \ 137 _syscallErrno = errno; \ 138 _wasSignaled = _monitor.wasSignaled(); \ 139 } \ 140 if (_wasSignaled) { \ 141 jniThrowException(jni_env, "java/io/InterruptedIOException", # syscall_name " interrupted"); \ 142 _rc = -1; \ 143 break; \ 144 } \ 145 if (_rc == -1 && _syscallErrno != EINTR) { \ 146 /* TODO: with a format string we could show the arguments too, like strace(1). */ \ 147 throwErrnoException(jni_env, # syscall_name); \ 148 break; \ 149 } \ 150 } while (_rc == -1); /* && _syscallErrno == EINTR && !_wasSignaled */ \ 151 _rc; }) 152 153 static void throwException(JNIEnv* env, jclass exceptionClass, jmethodID ctor3, jmethodID ctor2, 154 const char* functionName, int error) { 155 jthrowable cause = NULL; 156 if (env->ExceptionCheck()) { 157 cause = env->ExceptionOccurred(); 158 env->ExceptionClear(); 159 } 160 161 ScopedLocalRef<jstring> detailMessage(env, env->NewStringUTF(functionName)); 162 if (detailMessage.get() == NULL) { 163 // Not really much we can do here. We're probably dead in the water, 164 // but let's try to stumble on... 165 env->ExceptionClear(); 166 } 167 168 jobject exception; 169 if (cause != NULL) { 170 exception = env->NewObject(exceptionClass, ctor3, detailMessage.get(), error, cause); 171 } else { 172 exception = env->NewObject(exceptionClass, ctor2, detailMessage.get(), error); 173 } 174 env->Throw(reinterpret_cast<jthrowable>(exception)); 175 } 176 177 static void throwErrnoException(JNIEnv* env, const char* functionName) { 178 int error = errno; 179 static jmethodID ctor3 = env->GetMethodID(JniConstants::errnoExceptionClass, 180 "<init>", "(Ljava/lang/String;ILjava/lang/Throwable;)V"); 181 static jmethodID ctor2 = env->GetMethodID(JniConstants::errnoExceptionClass, 182 "<init>", "(Ljava/lang/String;I)V"); 183 throwException(env, JniConstants::errnoExceptionClass, ctor3, ctor2, functionName, error); 184 } 185 186 static void throwGaiException(JNIEnv* env, const char* functionName, int error) { 187 // Cache the methods ids before we throw, so we don't call GetMethodID with a pending exception. 188 static jmethodID ctor3 = env->GetMethodID(JniConstants::gaiExceptionClass, "<init>", 189 "(Ljava/lang/String;ILjava/lang/Throwable;)V"); 190 static jmethodID ctor2 = env->GetMethodID(JniConstants::gaiExceptionClass, "<init>", 191 "(Ljava/lang/String;I)V"); 192 if (errno != 0) { 193 // EAI_SYSTEM should mean "look at errno instead", but both glibc and bionic seem to 194 // mess this up. In particular, if you don't have INTERNET permission, errno will be EACCES 195 // but you'll get EAI_NONAME or EAI_NODATA. So we want our GaiException to have a 196 // potentially-relevant ErrnoException as its cause even if error != EAI_SYSTEM. 197 // http://code.google.com/p/android/issues/detail?id=15722 198 throwErrnoException(env, functionName); 199 // Deliberately fall through to throw another exception... 200 } 201 throwException(env, JniConstants::gaiExceptionClass, ctor3, ctor2, functionName, error); 202 } 203 204 template <typename rc_t> 205 static rc_t throwIfMinusOne(JNIEnv* env, const char* name, rc_t rc) { 206 if (rc == rc_t(-1)) { 207 throwErrnoException(env, name); 208 } 209 return rc; 210 } 211 212 template <typename ScopedT> 213 class IoVec { 214 public: 215 IoVec(JNIEnv* env, size_t bufferCount) : mEnv(env), mBufferCount(bufferCount) { 216 } 217 218 bool init(jobjectArray javaBuffers, jintArray javaOffsets, jintArray javaByteCounts) { 219 // We can't delete our local references until after the I/O, so make sure we have room. 220 if (mEnv->PushLocalFrame(mBufferCount + 16) < 0) { 221 return false; 222 } 223 ScopedIntArrayRO offsets(mEnv, javaOffsets); 224 if (offsets.get() == NULL) { 225 return false; 226 } 227 ScopedIntArrayRO byteCounts(mEnv, javaByteCounts); 228 if (byteCounts.get() == NULL) { 229 return false; 230 } 231 // TODO: Linux actually has a 1024 buffer limit. glibc works around this, and we should too. 232 // TODO: you can query the limit at runtime with sysconf(_SC_IOV_MAX). 233 for (size_t i = 0; i < mBufferCount; ++i) { 234 jobject buffer = mEnv->GetObjectArrayElement(javaBuffers, i); // We keep this local ref. 235 mScopedBuffers.push_back(new ScopedT(mEnv, buffer)); 236 jbyte* ptr = const_cast<jbyte*>(mScopedBuffers.back()->get()); 237 if (ptr == NULL) { 238 return false; 239 } 240 struct iovec iov; 241 iov.iov_base = reinterpret_cast<void*>(ptr + offsets[i]); 242 iov.iov_len = byteCounts[i]; 243 mIoVec.push_back(iov); 244 } 245 return true; 246 } 247 248 ~IoVec() { 249 for (size_t i = 0; i < mScopedBuffers.size(); ++i) { 250 delete mScopedBuffers[i]; 251 } 252 mEnv->PopLocalFrame(NULL); 253 } 254 255 iovec* get() { 256 return &mIoVec[0]; 257 } 258 259 size_t size() { 260 return mBufferCount; 261 } 262 263 private: 264 JNIEnv* mEnv; 265 size_t mBufferCount; 266 std::vector<iovec> mIoVec; 267 std::vector<ScopedT*> mScopedBuffers; 268 }; 269 270 static jobject makeSocketAddress(JNIEnv* env, const sockaddr_storage& ss) { 271 jint port; 272 jobject inetAddress = sockaddrToInetAddress(env, ss, &port); 273 if (inetAddress == NULL) { 274 return NULL; 275 } 276 static jmethodID ctor = env->GetMethodID(JniConstants::inetSocketAddressClass, "<init>", 277 "(Ljava/net/InetAddress;I)V"); 278 return env->NewObject(JniConstants::inetSocketAddressClass, ctor, inetAddress, port); 279 } 280 281 static jobject makeStructPasswd(JNIEnv* env, const struct passwd& pw) { 282 TO_JAVA_STRING(pw_name, pw.pw_name); 283 TO_JAVA_STRING(pw_dir, pw.pw_dir); 284 TO_JAVA_STRING(pw_shell, pw.pw_shell); 285 static jmethodID ctor = env->GetMethodID(JniConstants::structPasswdClass, "<init>", 286 "(Ljava/lang/String;IILjava/lang/String;Ljava/lang/String;)V"); 287 return env->NewObject(JniConstants::structPasswdClass, ctor, 288 pw_name, static_cast<jint>(pw.pw_uid), static_cast<jint>(pw.pw_gid), pw_dir, pw_shell); 289 } 290 291 static jobject makeStructStat(JNIEnv* env, const struct stat& sb) { 292 static jmethodID ctor = env->GetMethodID(JniConstants::structStatClass, "<init>", 293 "(JJIJIIJJJJJJJ)V"); 294 return env->NewObject(JniConstants::structStatClass, ctor, 295 static_cast<jlong>(sb.st_dev), static_cast<jlong>(sb.st_ino), 296 static_cast<jint>(sb.st_mode), static_cast<jlong>(sb.st_nlink), 297 static_cast<jint>(sb.st_uid), static_cast<jint>(sb.st_gid), 298 static_cast<jlong>(sb.st_rdev), static_cast<jlong>(sb.st_size), 299 static_cast<jlong>(sb.st_atime), static_cast<jlong>(sb.st_mtime), 300 static_cast<jlong>(sb.st_ctime), static_cast<jlong>(sb.st_blksize), 301 static_cast<jlong>(sb.st_blocks)); 302 } 303 304 static jobject makeStructStatVfs(JNIEnv* env, const struct statvfs& sb) { 305 #if defined(__APPLE__) 306 // Mac OS has no f_namelen field in struct statfs. 307 jlong max_name_length = 255; // __DARWIN_MAXNAMLEN 308 #else 309 jlong max_name_length = static_cast<jlong>(sb.f_namemax); 310 #endif 311 312 static jmethodID ctor = env->GetMethodID(JniConstants::structStatVfsClass, "<init>", 313 "(JJJJJJJJJJJ)V"); 314 return env->NewObject(JniConstants::structStatVfsClass, ctor, 315 static_cast<jlong>(sb.f_bsize), 316 static_cast<jlong>(sb.f_frsize), 317 static_cast<jlong>(sb.f_blocks), 318 static_cast<jlong>(sb.f_bfree), 319 static_cast<jlong>(sb.f_bavail), 320 static_cast<jlong>(sb.f_files), 321 static_cast<jlong>(sb.f_ffree), 322 static_cast<jlong>(sb.f_favail), 323 static_cast<jlong>(sb.f_fsid), 324 static_cast<jlong>(sb.f_flag), 325 max_name_length); 326 } 327 328 static jobject makeStructLinger(JNIEnv* env, const struct linger& l) { 329 static jmethodID ctor = env->GetMethodID(JniConstants::structLingerClass, "<init>", "(II)V"); 330 return env->NewObject(JniConstants::structLingerClass, ctor, l.l_onoff, l.l_linger); 331 } 332 333 static jobject makeStructTimeval(JNIEnv* env, const struct timeval& tv) { 334 static jmethodID ctor = env->GetMethodID(JniConstants::structTimevalClass, "<init>", "(JJ)V"); 335 return env->NewObject(JniConstants::structTimevalClass, ctor, 336 static_cast<jlong>(tv.tv_sec), static_cast<jlong>(tv.tv_usec)); 337 } 338 339 static jobject makeStructUcred(JNIEnv* env, const struct ucred& u __unused) { 340 #ifdef __APPLE__ 341 jniThrowException(env, "java/lang/UnsupportedOperationException", "unimplemented support for ucred on a Mac"); 342 return NULL; 343 #else 344 static jmethodID ctor = env->GetMethodID(JniConstants::structUcredClass, "<init>", "(III)V"); 345 return env->NewObject(JniConstants::structUcredClass, ctor, u.pid, u.uid, u.gid); 346 #endif 347 } 348 349 static jobject makeStructUtsname(JNIEnv* env, const struct utsname& buf) { 350 TO_JAVA_STRING(sysname, buf.sysname); 351 TO_JAVA_STRING(nodename, buf.nodename); 352 TO_JAVA_STRING(release, buf.release); 353 TO_JAVA_STRING(version, buf.version); 354 TO_JAVA_STRING(machine, buf.machine); 355 static jmethodID ctor = env->GetMethodID(JniConstants::structUtsnameClass, "<init>", 356 "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V"); 357 return env->NewObject(JniConstants::structUtsnameClass, ctor, 358 sysname, nodename, release, version, machine); 359 }; 360 361 static bool fillIfreq(JNIEnv* env, jstring javaInterfaceName, struct ifreq& req) { 362 ScopedUtfChars interfaceName(env, javaInterfaceName); 363 if (interfaceName.c_str() == NULL) { 364 return false; 365 } 366 memset(&req, 0, sizeof(req)); 367 strncpy(req.ifr_name, interfaceName.c_str(), sizeof(req.ifr_name)); 368 req.ifr_name[sizeof(req.ifr_name) - 1] = '\0'; 369 return true; 370 } 371 372 static bool fillInetSocketAddress(JNIEnv* env, jint rc, jobject javaInetSocketAddress, const sockaddr_storage& ss) { 373 if (rc == -1 || javaInetSocketAddress == NULL) { 374 return true; 375 } 376 // Fill out the passed-in InetSocketAddress with the sender's IP address and port number. 377 jint port; 378 jobject sender = sockaddrToInetAddress(env, ss, &port); 379 if (sender == NULL) { 380 return false; 381 } 382 static jfieldID addressFid = env->GetFieldID(JniConstants::inetSocketAddressClass, "addr", "Ljava/net/InetAddress;"); 383 static jfieldID portFid = env->GetFieldID(JniConstants::inetSocketAddressClass, "port", "I"); 384 env->SetObjectField(javaInetSocketAddress, addressFid, sender); 385 env->SetIntField(javaInetSocketAddress, portFid, port); 386 return true; 387 } 388 389 static jobject doStat(JNIEnv* env, jstring javaPath, bool isLstat) { 390 ScopedUtfChars path(env, javaPath); 391 if (path.c_str() == NULL) { 392 return NULL; 393 } 394 struct stat sb; 395 int rc = isLstat ? TEMP_FAILURE_RETRY(lstat(path.c_str(), &sb)) 396 : TEMP_FAILURE_RETRY(stat(path.c_str(), &sb)); 397 if (rc == -1) { 398 throwErrnoException(env, isLstat ? "lstat" : "stat"); 399 return NULL; 400 } 401 return makeStructStat(env, sb); 402 } 403 404 static jobject doGetSockName(JNIEnv* env, jobject javaFd, bool is_sockname) { 405 int fd = jniGetFDFromFileDescriptor(env, javaFd); 406 sockaddr_storage ss; 407 sockaddr* sa = reinterpret_cast<sockaddr*>(&ss); 408 socklen_t byteCount = sizeof(ss); 409 memset(&ss, 0, byteCount); 410 int rc = is_sockname ? TEMP_FAILURE_RETRY(getsockname(fd, sa, &byteCount)) 411 : TEMP_FAILURE_RETRY(getpeername(fd, sa, &byteCount)); 412 if (rc == -1) { 413 throwErrnoException(env, is_sockname ? "getsockname" : "getpeername"); 414 return NULL; 415 } 416 return makeSocketAddress(env, ss); 417 } 418 419 class Passwd { 420 public: 421 Passwd(JNIEnv* env) : mEnv(env), mResult(NULL) { 422 mBufferSize = sysconf(_SC_GETPW_R_SIZE_MAX); 423 mBuffer.reset(new char[mBufferSize]); 424 } 425 426 jobject getpwnam(const char* name) { 427 return process("getpwnam_r", getpwnam_r(name, &mPwd, mBuffer.get(), mBufferSize, &mResult)); 428 } 429 430 jobject getpwuid(uid_t uid) { 431 return process("getpwuid_r", getpwuid_r(uid, &mPwd, mBuffer.get(), mBufferSize, &mResult)); 432 } 433 434 struct passwd* get() { 435 return mResult; 436 } 437 438 private: 439 jobject process(const char* syscall, int error) { 440 if (mResult == NULL) { 441 errno = error; 442 throwErrnoException(mEnv, syscall); 443 return NULL; 444 } 445 return makeStructPasswd(mEnv, *mResult); 446 } 447 448 JNIEnv* mEnv; 449 UniquePtr<char[]> mBuffer; 450 size_t mBufferSize; 451 struct passwd mPwd; 452 struct passwd* mResult; 453 }; 454 455 static jobject Posix_accept(JNIEnv* env, jobject, jobject javaFd, jobject javaInetSocketAddress) { 456 sockaddr_storage ss; 457 socklen_t sl = sizeof(ss); 458 memset(&ss, 0, sizeof(ss)); 459 sockaddr* peer = (javaInetSocketAddress != NULL) ? reinterpret_cast<sockaddr*>(&ss) : NULL; 460 socklen_t* peerLength = (javaInetSocketAddress != NULL) ? &sl : 0; 461 jint clientFd = NET_FAILURE_RETRY(env, int, accept, javaFd, peer, peerLength); 462 if (clientFd == -1 || !fillInetSocketAddress(env, clientFd, javaInetSocketAddress, ss)) { 463 close(clientFd); 464 return NULL; 465 } 466 return (clientFd != -1) ? jniCreateFileDescriptor(env, clientFd) : NULL; 467 } 468 469 static jboolean Posix_access(JNIEnv* env, jobject, jstring javaPath, jint mode) { 470 ScopedUtfChars path(env, javaPath); 471 if (path.c_str() == NULL) { 472 return JNI_FALSE; 473 } 474 int rc = TEMP_FAILURE_RETRY(access(path.c_str(), mode)); 475 if (rc == -1) { 476 throwErrnoException(env, "access"); 477 } 478 return (rc == 0); 479 } 480 481 static void Posix_bind(JNIEnv* env, jobject, jobject javaFd, jobject javaAddress, jint port) { 482 sockaddr_storage ss; 483 socklen_t sa_len; 484 if (!inetAddressToSockaddr(env, javaAddress, port, ss, sa_len)) { 485 return; 486 } 487 const sockaddr* sa = reinterpret_cast<const sockaddr*>(&ss); 488 // We don't need the return value because we'll already have thrown. 489 (void) NET_FAILURE_RETRY(env, int, bind, javaFd, sa, sa_len); 490 } 491 492 static void Posix_chmod(JNIEnv* env, jobject, jstring javaPath, jint mode) { 493 ScopedUtfChars path(env, javaPath); 494 if (path.c_str() == NULL) { 495 return; 496 } 497 throwIfMinusOne(env, "chmod", TEMP_FAILURE_RETRY(chmod(path.c_str(), mode))); 498 } 499 500 static void Posix_chown(JNIEnv* env, jobject, jstring javaPath, jint uid, jint gid) { 501 ScopedUtfChars path(env, javaPath); 502 if (path.c_str() == NULL) { 503 return; 504 } 505 throwIfMinusOne(env, "chown", TEMP_FAILURE_RETRY(chown(path.c_str(), uid, gid))); 506 } 507 508 static void Posix_close(JNIEnv* env, jobject, jobject javaFd) { 509 // Get the FileDescriptor's 'fd' field and clear it. 510 // We need to do this before we can throw an IOException (http://b/3222087). 511 int fd = jniGetFDFromFileDescriptor(env, javaFd); 512 jniSetFileDescriptorOfFD(env, javaFd, -1); 513 514 // Even if close(2) fails with EINTR, the fd will have been closed. 515 // Using TEMP_FAILURE_RETRY will either lead to EBADF or closing someone else's fd. 516 // http://lkml.indiana.edu/hypermail/linux/kernel/0509.1/0877.html 517 throwIfMinusOne(env, "close", close(fd)); 518 } 519 520 static void Posix_connect(JNIEnv* env, jobject, jobject javaFd, jobject javaAddress, jint port) { 521 sockaddr_storage ss; 522 socklen_t sa_len; 523 if (!inetAddressToSockaddr(env, javaAddress, port, ss, sa_len)) { 524 return; 525 } 526 const sockaddr* sa = reinterpret_cast<const sockaddr*>(&ss); 527 // We don't need the return value because we'll already have thrown. 528 (void) NET_FAILURE_RETRY(env, int, connect, javaFd, sa, sa_len); 529 } 530 531 static jobject Posix_dup(JNIEnv* env, jobject, jobject javaOldFd) { 532 int oldFd = jniGetFDFromFileDescriptor(env, javaOldFd); 533 int newFd = throwIfMinusOne(env, "dup", TEMP_FAILURE_RETRY(dup(oldFd))); 534 return (newFd != -1) ? jniCreateFileDescriptor(env, newFd) : NULL; 535 } 536 537 static jobject Posix_dup2(JNIEnv* env, jobject, jobject javaOldFd, jint newFd) { 538 int oldFd = jniGetFDFromFileDescriptor(env, javaOldFd); 539 int fd = throwIfMinusOne(env, "dup2", TEMP_FAILURE_RETRY(dup2(oldFd, newFd))); 540 return (fd != -1) ? jniCreateFileDescriptor(env, fd) : NULL; 541 } 542 543 static jobjectArray Posix_environ(JNIEnv* env, jobject) { 544 extern char** environ; // Standard, but not in any header file. 545 return toStringArray(env, environ); 546 } 547 548 static void Posix_execve(JNIEnv* env, jobject, jstring javaFilename, jobjectArray javaArgv, jobjectArray javaEnvp) { 549 ScopedUtfChars path(env, javaFilename); 550 if (path.c_str() == NULL) { 551 return; 552 } 553 554 ExecStrings argv(env, javaArgv); 555 ExecStrings envp(env, javaEnvp); 556 execve(path.c_str(), argv.get(), envp.get()); 557 558 throwErrnoException(env, "execve"); 559 } 560 561 static void Posix_execv(JNIEnv* env, jobject, jstring javaFilename, jobjectArray javaArgv) { 562 ScopedUtfChars path(env, javaFilename); 563 if (path.c_str() == NULL) { 564 return; 565 } 566 567 ExecStrings argv(env, javaArgv); 568 execv(path.c_str(), argv.get()); 569 570 throwErrnoException(env, "execv"); 571 } 572 573 static void Posix_fchmod(JNIEnv* env, jobject, jobject javaFd, jint mode) { 574 int fd = jniGetFDFromFileDescriptor(env, javaFd); 575 throwIfMinusOne(env, "fchmod", TEMP_FAILURE_RETRY(fchmod(fd, mode))); 576 } 577 578 static void Posix_fchown(JNIEnv* env, jobject, jobject javaFd, jint uid, jint gid) { 579 int fd = jniGetFDFromFileDescriptor(env, javaFd); 580 throwIfMinusOne(env, "fchown", TEMP_FAILURE_RETRY(fchown(fd, uid, gid))); 581 } 582 583 static jint Posix_fcntlVoid(JNIEnv* env, jobject, jobject javaFd, jint cmd) { 584 int fd = jniGetFDFromFileDescriptor(env, javaFd); 585 return throwIfMinusOne(env, "fcntl", TEMP_FAILURE_RETRY(fcntl(fd, cmd))); 586 } 587 588 static jint Posix_fcntlLong(JNIEnv* env, jobject, jobject javaFd, jint cmd, jlong arg) { 589 int fd = jniGetFDFromFileDescriptor(env, javaFd); 590 return throwIfMinusOne(env, "fcntl", TEMP_FAILURE_RETRY(fcntl(fd, cmd, arg))); 591 } 592 593 static jint Posix_fcntlFlock(JNIEnv* env, jobject, jobject javaFd, jint cmd, jobject javaFlock) { 594 static jfieldID typeFid = env->GetFieldID(JniConstants::structFlockClass, "l_type", "S"); 595 static jfieldID whenceFid = env->GetFieldID(JniConstants::structFlockClass, "l_whence", "S"); 596 static jfieldID startFid = env->GetFieldID(JniConstants::structFlockClass, "l_start", "J"); 597 static jfieldID lenFid = env->GetFieldID(JniConstants::structFlockClass, "l_len", "J"); 598 static jfieldID pidFid = env->GetFieldID(JniConstants::structFlockClass, "l_pid", "I"); 599 600 struct flock64 lock; 601 memset(&lock, 0, sizeof(lock)); 602 lock.l_type = env->GetShortField(javaFlock, typeFid); 603 lock.l_whence = env->GetShortField(javaFlock, whenceFid); 604 lock.l_start = env->GetLongField(javaFlock, startFid); 605 lock.l_len = env->GetLongField(javaFlock, lenFid); 606 lock.l_pid = env->GetIntField(javaFlock, pidFid); 607 608 int rc = IO_FAILURE_RETRY(env, int, fcntl, javaFd, cmd, &lock); 609 if (rc != -1) { 610 env->SetShortField(javaFlock, typeFid, lock.l_type); 611 env->SetShortField(javaFlock, whenceFid, lock.l_whence); 612 env->SetLongField(javaFlock, startFid, lock.l_start); 613 env->SetLongField(javaFlock, lenFid, lock.l_len); 614 env->SetIntField(javaFlock, pidFid, lock.l_pid); 615 } 616 return rc; 617 } 618 619 static void Posix_fdatasync(JNIEnv* env, jobject, jobject javaFd) { 620 int fd = jniGetFDFromFileDescriptor(env, javaFd); 621 throwIfMinusOne(env, "fdatasync", TEMP_FAILURE_RETRY(fdatasync(fd))); 622 } 623 624 static jobject Posix_fstat(JNIEnv* env, jobject, jobject javaFd) { 625 int fd = jniGetFDFromFileDescriptor(env, javaFd); 626 struct stat sb; 627 int rc = TEMP_FAILURE_RETRY(fstat(fd, &sb)); 628 if (rc == -1) { 629 throwErrnoException(env, "fstat"); 630 return NULL; 631 } 632 return makeStructStat(env, sb); 633 } 634 635 static jobject Posix_fstatvfs(JNIEnv* env, jobject, jobject javaFd) { 636 int fd = jniGetFDFromFileDescriptor(env, javaFd); 637 struct statvfs sb; 638 int rc = TEMP_FAILURE_RETRY(fstatvfs(fd, &sb)); 639 if (rc == -1) { 640 throwErrnoException(env, "fstatvfs"); 641 return NULL; 642 } 643 return makeStructStatVfs(env, sb); 644 } 645 646 static void Posix_fsync(JNIEnv* env, jobject, jobject javaFd) { 647 int fd = jniGetFDFromFileDescriptor(env, javaFd); 648 throwIfMinusOne(env, "fsync", TEMP_FAILURE_RETRY(fsync(fd))); 649 } 650 651 static void Posix_ftruncate(JNIEnv* env, jobject, jobject javaFd, jlong length) { 652 int fd = jniGetFDFromFileDescriptor(env, javaFd); 653 throwIfMinusOne(env, "ftruncate", TEMP_FAILURE_RETRY(ftruncate64(fd, length))); 654 } 655 656 static jstring Posix_gai_strerror(JNIEnv* env, jobject, jint error) { 657 return env->NewStringUTF(gai_strerror(error)); 658 } 659 660 static jobjectArray Posix_android_getaddrinfo(JNIEnv* env, jobject, jstring javaNode, 661 jobject javaHints, jint netId) { 662 ScopedUtfChars node(env, javaNode); 663 if (node.c_str() == NULL) { 664 return NULL; 665 } 666 667 static jfieldID flagsFid = env->GetFieldID(JniConstants::structAddrinfoClass, "ai_flags", "I"); 668 static jfieldID familyFid = env->GetFieldID(JniConstants::structAddrinfoClass, "ai_family", "I"); 669 static jfieldID socktypeFid = env->GetFieldID(JniConstants::structAddrinfoClass, "ai_socktype", "I"); 670 static jfieldID protocolFid = env->GetFieldID(JniConstants::structAddrinfoClass, "ai_protocol", "I"); 671 672 addrinfo hints; 673 memset(&hints, 0, sizeof(hints)); 674 hints.ai_flags = env->GetIntField(javaHints, flagsFid); 675 hints.ai_family = env->GetIntField(javaHints, familyFid); 676 hints.ai_socktype = env->GetIntField(javaHints, socktypeFid); 677 hints.ai_protocol = env->GetIntField(javaHints, protocolFid); 678 679 addrinfo* addressList = NULL; 680 errno = 0; 681 int rc = android_getaddrinfofornet(node.c_str(), NULL, &hints, netId, 0, &addressList); 682 UniquePtr<addrinfo, addrinfo_deleter> addressListDeleter(addressList); 683 if (rc != 0) { 684 throwGaiException(env, "android_getaddrinfo", rc); 685 return NULL; 686 } 687 688 // Count results so we know how to size the output array. 689 int addressCount = 0; 690 for (addrinfo* ai = addressList; ai != NULL; ai = ai->ai_next) { 691 if (ai->ai_family == AF_INET || ai->ai_family == AF_INET6) { 692 ++addressCount; 693 } else { 694 ALOGE("android_getaddrinfo unexpected ai_family %i", ai->ai_family); 695 } 696 } 697 if (addressCount == 0) { 698 return NULL; 699 } 700 701 // Prepare output array. 702 jobjectArray result = env->NewObjectArray(addressCount, JniConstants::inetAddressClass, NULL); 703 if (result == NULL) { 704 return NULL; 705 } 706 707 // Examine returned addresses one by one, save them in the output array. 708 int index = 0; 709 for (addrinfo* ai = addressList; ai != NULL; ai = ai->ai_next) { 710 if (ai->ai_family != AF_INET && ai->ai_family != AF_INET6) { 711 // Unknown address family. Skip this address. 712 ALOGE("android_getaddrinfo unexpected ai_family %i", ai->ai_family); 713 continue; 714 } 715 716 // Convert each IP address into a Java byte array. 717 sockaddr_storage& address = *reinterpret_cast<sockaddr_storage*>(ai->ai_addr); 718 ScopedLocalRef<jobject> inetAddress(env, sockaddrToInetAddress(env, address, NULL)); 719 if (inetAddress.get() == NULL) { 720 return NULL; 721 } 722 env->SetObjectArrayElement(result, index, inetAddress.get()); 723 ++index; 724 } 725 return result; 726 } 727 728 static jint Posix_getegid(JNIEnv*, jobject) { 729 return getegid(); 730 } 731 732 static jint Posix_geteuid(JNIEnv*, jobject) { 733 return geteuid(); 734 } 735 736 static jint Posix_getgid(JNIEnv*, jobject) { 737 return getgid(); 738 } 739 740 static jstring Posix_getenv(JNIEnv* env, jobject, jstring javaName) { 741 ScopedUtfChars name(env, javaName); 742 if (name.c_str() == NULL) { 743 return NULL; 744 } 745 return env->NewStringUTF(getenv(name.c_str())); 746 } 747 748 static jstring Posix_getnameinfo(JNIEnv* env, jobject, jobject javaAddress, jint flags) { 749 sockaddr_storage ss; 750 socklen_t sa_len; 751 if (!inetAddressToSockaddrVerbatim(env, javaAddress, 0, ss, sa_len)) { 752 return NULL; 753 } 754 char buf[NI_MAXHOST]; // NI_MAXHOST is longer than INET6_ADDRSTRLEN. 755 errno = 0; 756 int rc = getnameinfo(reinterpret_cast<sockaddr*>(&ss), sa_len, buf, sizeof(buf), NULL, 0, flags); 757 if (rc != 0) { 758 throwGaiException(env, "getnameinfo", rc); 759 return NULL; 760 } 761 return env->NewStringUTF(buf); 762 } 763 764 static jobject Posix_getpeername(JNIEnv* env, jobject, jobject javaFd) { 765 return doGetSockName(env, javaFd, false); 766 } 767 768 static jint Posix_getpid(JNIEnv*, jobject) { 769 return getpid(); 770 } 771 772 static jint Posix_getppid(JNIEnv*, jobject) { 773 return getppid(); 774 } 775 776 static jobject Posix_getpwnam(JNIEnv* env, jobject, jstring javaName) { 777 ScopedUtfChars name(env, javaName); 778 if (name.c_str() == NULL) { 779 return NULL; 780 } 781 return Passwd(env).getpwnam(name.c_str()); 782 } 783 784 static jobject Posix_getpwuid(JNIEnv* env, jobject, jint uid) { 785 return Passwd(env).getpwuid(uid); 786 } 787 788 static jobject Posix_getsockname(JNIEnv* env, jobject, jobject javaFd) { 789 return doGetSockName(env, javaFd, true); 790 } 791 792 static jint Posix_getsockoptByte(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 793 int fd = jniGetFDFromFileDescriptor(env, javaFd); 794 u_char result = 0; 795 socklen_t size = sizeof(result); 796 throwIfMinusOne(env, "getsockopt", TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &result, &size))); 797 return result; 798 } 799 800 static jobject Posix_getsockoptInAddr(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 801 int fd = jniGetFDFromFileDescriptor(env, javaFd); 802 sockaddr_storage ss; 803 memset(&ss, 0, sizeof(ss)); 804 ss.ss_family = AF_INET; // This is only for the IPv4-only IP_MULTICAST_IF. 805 sockaddr_in* sa = reinterpret_cast<sockaddr_in*>(&ss); 806 socklen_t size = sizeof(sa->sin_addr); 807 int rc = TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &sa->sin_addr, &size)); 808 if (rc == -1) { 809 throwErrnoException(env, "getsockopt"); 810 return NULL; 811 } 812 return sockaddrToInetAddress(env, ss, NULL); 813 } 814 815 static jint Posix_getsockoptInt(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 816 int fd = jniGetFDFromFileDescriptor(env, javaFd); 817 jint result = 0; 818 socklen_t size = sizeof(result); 819 throwIfMinusOne(env, "getsockopt", TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &result, &size))); 820 return result; 821 } 822 823 static jobject Posix_getsockoptLinger(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 824 int fd = jniGetFDFromFileDescriptor(env, javaFd); 825 struct linger l; 826 socklen_t size = sizeof(l); 827 memset(&l, 0, size); 828 int rc = TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &l, &size)); 829 if (rc == -1) { 830 throwErrnoException(env, "getsockopt"); 831 return NULL; 832 } 833 return makeStructLinger(env, l); 834 } 835 836 static jobject Posix_getsockoptTimeval(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 837 int fd = jniGetFDFromFileDescriptor(env, javaFd); 838 struct timeval tv; 839 socklen_t size = sizeof(tv); 840 memset(&tv, 0, size); 841 int rc = TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &tv, &size)); 842 if (rc == -1) { 843 throwErrnoException(env, "getsockopt"); 844 return NULL; 845 } 846 return makeStructTimeval(env, tv); 847 } 848 849 static jobject Posix_getsockoptUcred(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 850 int fd = jniGetFDFromFileDescriptor(env, javaFd); 851 struct ucred u; 852 socklen_t size = sizeof(u); 853 memset(&u, 0, size); 854 int rc = TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &u, &size)); 855 if (rc == -1) { 856 throwErrnoException(env, "getsockopt"); 857 return NULL; 858 } 859 return makeStructUcred(env, u); 860 } 861 862 static jint Posix_gettid(JNIEnv* env __unused, jobject) { 863 #if defined(__APPLE__) 864 uint64_t owner; 865 int rc = pthread_threadid_np(NULL, &owner); // Requires Mac OS 10.6 866 if (rc != 0) { 867 throwErrnoException(env, "gettid"); 868 return 0; 869 } 870 return static_cast<jint>(owner); 871 #else 872 // Neither bionic nor glibc exposes gettid(2). 873 return syscall(__NR_gettid); 874 #endif 875 } 876 877 static jint Posix_getuid(JNIEnv*, jobject) { 878 return getuid(); 879 } 880 881 static jstring Posix_if_indextoname(JNIEnv* env, jobject, jint index) { 882 char buf[IF_NAMESIZE]; 883 char* name = if_indextoname(index, buf); 884 // if_indextoname(3) returns NULL on failure, which will come out of NewStringUTF unscathed. 885 // There's no useful information in errno, so we don't bother throwing. Callers can null-check. 886 return env->NewStringUTF(name); 887 } 888 889 static jobject Posix_inet_pton(JNIEnv* env, jobject, jint family, jstring javaName) { 890 ScopedUtfChars name(env, javaName); 891 if (name.c_str() == NULL) { 892 return NULL; 893 } 894 sockaddr_storage ss; 895 memset(&ss, 0, sizeof(ss)); 896 // sockaddr_in and sockaddr_in6 are at the same address, so we can use either here. 897 void* dst = &reinterpret_cast<sockaddr_in*>(&ss)->sin_addr; 898 if (inet_pton(family, name.c_str(), dst) != 1) { 899 return NULL; 900 } 901 ss.ss_family = family; 902 return sockaddrToInetAddress(env, ss, NULL); 903 } 904 905 static jobject Posix_ioctlInetAddress(JNIEnv* env, jobject, jobject javaFd, jint cmd, jstring javaInterfaceName) { 906 struct ifreq req; 907 if (!fillIfreq(env, javaInterfaceName, req)) { 908 return NULL; 909 } 910 int fd = jniGetFDFromFileDescriptor(env, javaFd); 911 int rc = throwIfMinusOne(env, "ioctl", TEMP_FAILURE_RETRY(ioctl(fd, cmd, &req))); 912 if (rc == -1) { 913 return NULL; 914 } 915 return sockaddrToInetAddress(env, reinterpret_cast<sockaddr_storage&>(req.ifr_addr), NULL); 916 } 917 918 static jint Posix_ioctlInt(JNIEnv* env, jobject, jobject javaFd, jint cmd, jobject javaArg) { 919 // This is complicated because ioctls may return their result by updating their argument 920 // or via their return value, so we need to support both. 921 int fd = jniGetFDFromFileDescriptor(env, javaFd); 922 static jfieldID valueFid = env->GetFieldID(JniConstants::mutableIntClass, "value", "I"); 923 jint arg = env->GetIntField(javaArg, valueFid); 924 int rc = throwIfMinusOne(env, "ioctl", TEMP_FAILURE_RETRY(ioctl(fd, cmd, &arg))); 925 if (!env->ExceptionCheck()) { 926 env->SetIntField(javaArg, valueFid, arg); 927 } 928 return rc; 929 } 930 931 static jboolean Posix_isatty(JNIEnv* env, jobject, jobject javaFd) { 932 int fd = jniGetFDFromFileDescriptor(env, javaFd); 933 return TEMP_FAILURE_RETRY(isatty(fd)) == 1; 934 } 935 936 static void Posix_kill(JNIEnv* env, jobject, jint pid, jint sig) { 937 throwIfMinusOne(env, "kill", TEMP_FAILURE_RETRY(kill(pid, sig))); 938 } 939 940 static void Posix_lchown(JNIEnv* env, jobject, jstring javaPath, jint uid, jint gid) { 941 ScopedUtfChars path(env, javaPath); 942 if (path.c_str() == NULL) { 943 return; 944 } 945 throwIfMinusOne(env, "lchown", TEMP_FAILURE_RETRY(lchown(path.c_str(), uid, gid))); 946 } 947 948 static void Posix_link(JNIEnv* env, jobject, jstring javaOldPath, jstring javaNewPath) { 949 ScopedUtfChars oldPath(env, javaOldPath); 950 if (oldPath.c_str() == NULL) { 951 return; 952 } 953 ScopedUtfChars newPath(env, javaNewPath); 954 if (newPath.c_str() == NULL) { 955 return; 956 } 957 throwIfMinusOne(env, "link", TEMP_FAILURE_RETRY(link(oldPath.c_str(), newPath.c_str()))); 958 } 959 960 static void Posix_listen(JNIEnv* env, jobject, jobject javaFd, jint backlog) { 961 int fd = jniGetFDFromFileDescriptor(env, javaFd); 962 throwIfMinusOne(env, "listen", TEMP_FAILURE_RETRY(listen(fd, backlog))); 963 } 964 965 static jlong Posix_lseek(JNIEnv* env, jobject, jobject javaFd, jlong offset, jint whence) { 966 int fd = jniGetFDFromFileDescriptor(env, javaFd); 967 return throwIfMinusOne(env, "lseek", TEMP_FAILURE_RETRY(lseek64(fd, offset, whence))); 968 } 969 970 static jobject Posix_lstat(JNIEnv* env, jobject, jstring javaPath) { 971 return doStat(env, javaPath, true); 972 } 973 974 static void Posix_mincore(JNIEnv* env, jobject, jlong address, jlong byteCount, jbyteArray javaVector) { 975 ScopedByteArrayRW vector(env, javaVector); 976 if (vector.get() == NULL) { 977 return; 978 } 979 void* ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 980 unsigned char* vec = reinterpret_cast<unsigned char*>(vector.get()); 981 throwIfMinusOne(env, "mincore", TEMP_FAILURE_RETRY(mincore(ptr, byteCount, vec))); 982 } 983 984 static void Posix_mkdir(JNIEnv* env, jobject, jstring javaPath, jint mode) { 985 ScopedUtfChars path(env, javaPath); 986 if (path.c_str() == NULL) { 987 return; 988 } 989 throwIfMinusOne(env, "mkdir", TEMP_FAILURE_RETRY(mkdir(path.c_str(), mode))); 990 } 991 992 static void Posix_mkfifo(JNIEnv* env, jobject, jstring javaPath, jint mode) { 993 ScopedUtfChars path(env, javaPath); 994 if (path.c_str() == NULL) { 995 return; 996 } 997 throwIfMinusOne(env, "mkfifo", TEMP_FAILURE_RETRY(mkfifo(path.c_str(), mode))); 998 } 999 1000 static void Posix_mlock(JNIEnv* env, jobject, jlong address, jlong byteCount) { 1001 void* ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1002 throwIfMinusOne(env, "mlock", TEMP_FAILURE_RETRY(mlock(ptr, byteCount))); 1003 } 1004 1005 static jlong Posix_mmap(JNIEnv* env, jobject, jlong address, jlong byteCount, jint prot, jint flags, jobject javaFd, jlong offset) { 1006 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1007 void* suggestedPtr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1008 void* ptr = mmap(suggestedPtr, byteCount, prot, flags, fd, offset); 1009 if (ptr == MAP_FAILED) { 1010 throwErrnoException(env, "mmap"); 1011 } 1012 return static_cast<jlong>(reinterpret_cast<uintptr_t>(ptr)); 1013 } 1014 1015 static void Posix_msync(JNIEnv* env, jobject, jlong address, jlong byteCount, jint flags) { 1016 void* ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1017 throwIfMinusOne(env, "msync", TEMP_FAILURE_RETRY(msync(ptr, byteCount, flags))); 1018 } 1019 1020 static void Posix_munlock(JNIEnv* env, jobject, jlong address, jlong byteCount) { 1021 void* ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1022 throwIfMinusOne(env, "munlock", TEMP_FAILURE_RETRY(munlock(ptr, byteCount))); 1023 } 1024 1025 static void Posix_munmap(JNIEnv* env, jobject, jlong address, jlong byteCount) { 1026 void* ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1027 throwIfMinusOne(env, "munmap", TEMP_FAILURE_RETRY(munmap(ptr, byteCount))); 1028 } 1029 1030 static jobject Posix_open(JNIEnv* env, jobject, jstring javaPath, jint flags, jint mode) { 1031 ScopedUtfChars path(env, javaPath); 1032 if (path.c_str() == NULL) { 1033 return NULL; 1034 } 1035 int fd = throwIfMinusOne(env, "open", TEMP_FAILURE_RETRY(open(path.c_str(), flags, mode))); 1036 return fd != -1 ? jniCreateFileDescriptor(env, fd) : NULL; 1037 } 1038 1039 static jobjectArray Posix_pipe(JNIEnv* env, jobject) { 1040 int fds[2]; 1041 throwIfMinusOne(env, "pipe", TEMP_FAILURE_RETRY(pipe(&fds[0]))); 1042 jobjectArray result = env->NewObjectArray(2, JniConstants::fileDescriptorClass, NULL); 1043 if (result == NULL) { 1044 return NULL; 1045 } 1046 for (int i = 0; i < 2; ++i) { 1047 ScopedLocalRef<jobject> fd(env, jniCreateFileDescriptor(env, fds[i])); 1048 if (fd.get() == NULL) { 1049 return NULL; 1050 } 1051 env->SetObjectArrayElement(result, i, fd.get()); 1052 if (env->ExceptionCheck()) { 1053 return NULL; 1054 } 1055 } 1056 return result; 1057 } 1058 1059 static jint Posix_poll(JNIEnv* env, jobject, jobjectArray javaStructs, jint timeoutMs) { 1060 static jfieldID fdFid = env->GetFieldID(JniConstants::structPollfdClass, "fd", "Ljava/io/FileDescriptor;"); 1061 static jfieldID eventsFid = env->GetFieldID(JniConstants::structPollfdClass, "events", "S"); 1062 static jfieldID reventsFid = env->GetFieldID(JniConstants::structPollfdClass, "revents", "S"); 1063 1064 // Turn the Java android.system.StructPollfd[] into a C++ struct pollfd[]. 1065 size_t arrayLength = env->GetArrayLength(javaStructs); 1066 UniquePtr<struct pollfd[]> fds(new struct pollfd[arrayLength]); 1067 memset(fds.get(), 0, sizeof(struct pollfd) * arrayLength); 1068 size_t count = 0; // Some trailing array elements may be irrelevant. (See below.) 1069 for (size_t i = 0; i < arrayLength; ++i) { 1070 ScopedLocalRef<jobject> javaStruct(env, env->GetObjectArrayElement(javaStructs, i)); 1071 if (javaStruct.get() == NULL) { 1072 break; // We allow trailing nulls in the array for caller convenience. 1073 } 1074 ScopedLocalRef<jobject> javaFd(env, env->GetObjectField(javaStruct.get(), fdFid)); 1075 if (javaFd.get() == NULL) { 1076 break; // We also allow callers to just clear the fd field (this is what Selector does). 1077 } 1078 fds[count].fd = jniGetFDFromFileDescriptor(env, javaFd.get()); 1079 fds[count].events = env->GetShortField(javaStruct.get(), eventsFid); 1080 ++count; 1081 } 1082 1083 std::vector<AsynchronousCloseMonitor*> monitors; 1084 for (size_t i = 0; i < count; ++i) { 1085 monitors.push_back(new AsynchronousCloseMonitor(fds[i].fd)); 1086 } 1087 int rc = poll(fds.get(), count, timeoutMs); 1088 for (size_t i = 0; i < monitors.size(); ++i) { 1089 delete monitors[i]; 1090 } 1091 if (rc == -1) { 1092 throwErrnoException(env, "poll"); 1093 return -1; 1094 } 1095 1096 // Update the revents fields in the Java android.system.StructPollfd[]. 1097 for (size_t i = 0; i < count; ++i) { 1098 ScopedLocalRef<jobject> javaStruct(env, env->GetObjectArrayElement(javaStructs, i)); 1099 if (javaStruct.get() == NULL) { 1100 return -1; 1101 } 1102 env->SetShortField(javaStruct.get(), reventsFid, fds[i].revents); 1103 } 1104 return rc; 1105 } 1106 1107 static void Posix_posix_fallocate(JNIEnv* env, jobject, jobject javaFd __unused, 1108 jlong offset __unused, jlong length __unused) { 1109 #ifdef __APPLE__ 1110 jniThrowException(env, "java/lang/UnsupportedOperationException", 1111 "fallocate doesn't exist on a Mac"); 1112 #else 1113 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1114 errno = TEMP_FAILURE_RETRY(posix_fallocate64(fd, offset, length)); 1115 if (errno != 0) { 1116 throwErrnoException(env, "posix_fallocate"); 1117 } 1118 #endif 1119 } 1120 1121 static jint Posix_prctl(JNIEnv* env, jobject, jint option __unused, jlong arg2 __unused, 1122 jlong arg3 __unused, jlong arg4 __unused, jlong arg5 __unused) { 1123 #ifdef __APPLE__ 1124 jniThrowException(env, "java/lang/UnsupportedOperationException", "prctl doesn't exist on a Mac"); 1125 return 0; 1126 #else 1127 int result = prctl(static_cast<int>(option), 1128 static_cast<unsigned long>(arg2), static_cast<unsigned long>(arg3), 1129 static_cast<unsigned long>(arg4), static_cast<unsigned long>(arg5)); 1130 return throwIfMinusOne(env, "prctl", result); 1131 #endif 1132 } 1133 1134 static jint Posix_preadBytes(JNIEnv* env, jobject, jobject javaFd, jobject javaBytes, jint byteOffset, jint byteCount, jlong offset) { 1135 ScopedBytesRW bytes(env, javaBytes); 1136 if (bytes.get() == NULL) { 1137 return -1; 1138 } 1139 return IO_FAILURE_RETRY(env, ssize_t, pread64, javaFd, bytes.get() + byteOffset, byteCount, offset); 1140 } 1141 1142 static jint Posix_pwriteBytes(JNIEnv* env, jobject, jobject javaFd, jbyteArray javaBytes, jint byteOffset, jint byteCount, jlong offset) { 1143 ScopedBytesRO bytes(env, javaBytes); 1144 if (bytes.get() == NULL) { 1145 return -1; 1146 } 1147 return IO_FAILURE_RETRY(env, ssize_t, pwrite64, javaFd, bytes.get() + byteOffset, byteCount, offset); 1148 } 1149 1150 static jint Posix_readBytes(JNIEnv* env, jobject, jobject javaFd, jobject javaBytes, jint byteOffset, jint byteCount) { 1151 ScopedBytesRW bytes(env, javaBytes); 1152 if (bytes.get() == NULL) { 1153 return -1; 1154 } 1155 return IO_FAILURE_RETRY(env, ssize_t, read, javaFd, bytes.get() + byteOffset, byteCount); 1156 } 1157 1158 static jstring Posix_readlink(JNIEnv* env, jobject, jstring javaPath) { 1159 ScopedUtfChars path(env, javaPath); 1160 if (path.c_str() == NULL) { 1161 return NULL; 1162 } 1163 1164 std::string result; 1165 if (!readlink(path.c_str(), result)) { 1166 throwErrnoException(env, "readlink"); 1167 return NULL; 1168 } 1169 return env->NewStringUTF(result.c_str()); 1170 } 1171 1172 static jint Posix_readv(JNIEnv* env, jobject, jobject javaFd, jobjectArray buffers, jintArray offsets, jintArray byteCounts) { 1173 IoVec<ScopedBytesRW> ioVec(env, env->GetArrayLength(buffers)); 1174 if (!ioVec.init(buffers, offsets, byteCounts)) { 1175 return -1; 1176 } 1177 return IO_FAILURE_RETRY(env, ssize_t, readv, javaFd, ioVec.get(), ioVec.size()); 1178 } 1179 1180 static jint Posix_recvfromBytes(JNIEnv* env, jobject, jobject javaFd, jobject javaBytes, jint byteOffset, jint byteCount, jint flags, jobject javaInetSocketAddress) { 1181 ScopedBytesRW bytes(env, javaBytes); 1182 if (bytes.get() == NULL) { 1183 return -1; 1184 } 1185 sockaddr_storage ss; 1186 socklen_t sl = sizeof(ss); 1187 memset(&ss, 0, sizeof(ss)); 1188 sockaddr* from = (javaInetSocketAddress != NULL) ? reinterpret_cast<sockaddr*>(&ss) : NULL; 1189 socklen_t* fromLength = (javaInetSocketAddress != NULL) ? &sl : 0; 1190 jint recvCount = NET_FAILURE_RETRY(env, ssize_t, recvfrom, javaFd, bytes.get() + byteOffset, byteCount, flags, from, fromLength); 1191 fillInetSocketAddress(env, recvCount, javaInetSocketAddress, ss); 1192 return recvCount; 1193 } 1194 1195 static void Posix_remove(JNIEnv* env, jobject, jstring javaPath) { 1196 ScopedUtfChars path(env, javaPath); 1197 if (path.c_str() == NULL) { 1198 return; 1199 } 1200 throwIfMinusOne(env, "remove", TEMP_FAILURE_RETRY(remove(path.c_str()))); 1201 } 1202 1203 static void Posix_rename(JNIEnv* env, jobject, jstring javaOldPath, jstring javaNewPath) { 1204 ScopedUtfChars oldPath(env, javaOldPath); 1205 if (oldPath.c_str() == NULL) { 1206 return; 1207 } 1208 ScopedUtfChars newPath(env, javaNewPath); 1209 if (newPath.c_str() == NULL) { 1210 return; 1211 } 1212 throwIfMinusOne(env, "rename", TEMP_FAILURE_RETRY(rename(oldPath.c_str(), newPath.c_str()))); 1213 } 1214 1215 static jlong Posix_sendfile(JNIEnv* env, jobject, jobject javaOutFd, jobject javaInFd, jobject javaOffset, jlong byteCount) { 1216 int outFd = jniGetFDFromFileDescriptor(env, javaOutFd); 1217 int inFd = jniGetFDFromFileDescriptor(env, javaInFd); 1218 static jfieldID valueFid = env->GetFieldID(JniConstants::mutableLongClass, "value", "J"); 1219 off_t offset = 0; 1220 off_t* offsetPtr = NULL; 1221 if (javaOffset != NULL) { 1222 // TODO: fix bionic so we can have a 64-bit off_t! 1223 offset = env->GetLongField(javaOffset, valueFid); 1224 offsetPtr = &offset; 1225 } 1226 jlong result = throwIfMinusOne(env, "sendfile", TEMP_FAILURE_RETRY(sendfile(outFd, inFd, offsetPtr, byteCount))); 1227 if (javaOffset != NULL) { 1228 env->SetLongField(javaOffset, valueFid, offset); 1229 } 1230 return result; 1231 } 1232 1233 static jint Posix_sendtoBytes(JNIEnv* env, jobject, jobject javaFd, jobject javaBytes, jint byteOffset, jint byteCount, jint flags, jobject javaInetAddress, jint port) { 1234 ScopedBytesRO bytes(env, javaBytes); 1235 if (bytes.get() == NULL) { 1236 return -1; 1237 } 1238 sockaddr_storage ss; 1239 socklen_t sa_len = 0; 1240 if (javaInetAddress != NULL && !inetAddressToSockaddr(env, javaInetAddress, port, ss, sa_len)) { 1241 return -1; 1242 } 1243 const sockaddr* to = (javaInetAddress != NULL) ? reinterpret_cast<const sockaddr*>(&ss) : NULL; 1244 return NET_FAILURE_RETRY(env, ssize_t, sendto, javaFd, bytes.get() + byteOffset, byteCount, flags, to, sa_len); 1245 } 1246 1247 static void Posix_setegid(JNIEnv* env, jobject, jint egid) { 1248 throwIfMinusOne(env, "setegid", TEMP_FAILURE_RETRY(setegid(egid))); 1249 } 1250 1251 static void Posix_setenv(JNIEnv* env, jobject, jstring javaName, jstring javaValue, jboolean overwrite) { 1252 ScopedUtfChars name(env, javaName); 1253 if (name.c_str() == NULL) { 1254 return; 1255 } 1256 ScopedUtfChars value(env, javaValue); 1257 if (value.c_str() == NULL) { 1258 return; 1259 } 1260 throwIfMinusOne(env, "setenv", setenv(name.c_str(), value.c_str(), overwrite)); 1261 } 1262 1263 static void Posix_seteuid(JNIEnv* env, jobject, jint euid) { 1264 throwIfMinusOne(env, "seteuid", TEMP_FAILURE_RETRY(seteuid(euid))); 1265 } 1266 1267 static void Posix_setgid(JNIEnv* env, jobject, jint gid) { 1268 throwIfMinusOne(env, "setgid", TEMP_FAILURE_RETRY(setgid(gid))); 1269 } 1270 1271 static jint Posix_setsid(JNIEnv* env, jobject) { 1272 return throwIfMinusOne(env, "setsid", TEMP_FAILURE_RETRY(setsid())); 1273 } 1274 1275 static void Posix_setsockoptByte(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jint value) { 1276 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1277 u_char byte = value; 1278 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &byte, sizeof(byte)))); 1279 } 1280 1281 static void Posix_setsockoptIfreq(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jstring javaInterfaceName) { 1282 struct ifreq req; 1283 if (!fillIfreq(env, javaInterfaceName, req)) { 1284 return; 1285 } 1286 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1287 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req, sizeof(req)))); 1288 } 1289 1290 static void Posix_setsockoptInt(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jint value) { 1291 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1292 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &value, sizeof(value)))); 1293 } 1294 1295 #if defined(__APPLE__) && MAC_OS_X_VERSION_MAX_ALLOWED < 1070 1296 // Mac OS didn't support modern multicast APIs until 10.7. 1297 static void Posix_setsockoptIpMreqn(JNIEnv*, jobject, jobject, jint, jint, jint) { abort(); } 1298 static void Posix_setsockoptGroupReq(JNIEnv*, jobject, jobject, jint, jint, jobject) { abort(); } 1299 static void Posix_setsockoptGroupSourceReq(JNIEnv*, jobject, jobject, jint, jint, jobject) { abort(); } 1300 #else 1301 static void Posix_setsockoptIpMreqn(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jint value) { 1302 ip_mreqn req; 1303 memset(&req, 0, sizeof(req)); 1304 req.imr_ifindex = value; 1305 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1306 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req, sizeof(req)))); 1307 } 1308 1309 static void Posix_setsockoptGroupReq(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jobject javaGroupReq) { 1310 struct group_req req; 1311 memset(&req, 0, sizeof(req)); 1312 1313 static jfieldID grInterfaceFid = env->GetFieldID(JniConstants::structGroupReqClass, "gr_interface", "I"); 1314 req.gr_interface = env->GetIntField(javaGroupReq, grInterfaceFid); 1315 // Get the IPv4 or IPv6 multicast address to join or leave. 1316 static jfieldID grGroupFid = env->GetFieldID(JniConstants::structGroupReqClass, "gr_group", "Ljava/net/InetAddress;"); 1317 ScopedLocalRef<jobject> javaGroup(env, env->GetObjectField(javaGroupReq, grGroupFid)); 1318 socklen_t sa_len; 1319 if (!inetAddressToSockaddrVerbatim(env, javaGroup.get(), 0, req.gr_group, sa_len)) { 1320 return; 1321 } 1322 1323 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1324 int rc = TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req, sizeof(req))); 1325 if (rc == -1 && errno == EINVAL) { 1326 // Maybe we're a 32-bit binary talking to a 64-bit kernel? 1327 // glibc doesn't automatically handle this. 1328 // http://sourceware.org/bugzilla/show_bug.cgi?id=12080 1329 struct group_req64 { 1330 uint32_t gr_interface; 1331 uint32_t my_padding; 1332 sockaddr_storage gr_group; 1333 }; 1334 group_req64 req64; 1335 req64.gr_interface = req.gr_interface; 1336 memcpy(&req64.gr_group, &req.gr_group, sizeof(req.gr_group)); 1337 rc = TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req64, sizeof(req64))); 1338 } 1339 throwIfMinusOne(env, "setsockopt", rc); 1340 } 1341 1342 static void Posix_setsockoptGroupSourceReq(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jobject javaGroupSourceReq) { 1343 socklen_t sa_len; 1344 struct group_source_req req; 1345 memset(&req, 0, sizeof(req)); 1346 1347 static jfieldID gsrInterfaceFid = env->GetFieldID(JniConstants::structGroupSourceReqClass, "gsr_interface", "I"); 1348 req.gsr_interface = env->GetIntField(javaGroupSourceReq, gsrInterfaceFid); 1349 // Get the IPv4 or IPv6 multicast address to join or leave. 1350 static jfieldID gsrGroupFid = env->GetFieldID(JniConstants::structGroupSourceReqClass, "gsr_group", "Ljava/net/InetAddress;"); 1351 ScopedLocalRef<jobject> javaGroup(env, env->GetObjectField(javaGroupSourceReq, gsrGroupFid)); 1352 if (!inetAddressToSockaddrVerbatim(env, javaGroup.get(), 0, req.gsr_group, sa_len)) { 1353 return; 1354 } 1355 1356 // Get the IPv4 or IPv6 multicast address to add to the filter. 1357 static jfieldID gsrSourceFid = env->GetFieldID(JniConstants::structGroupSourceReqClass, "gsr_source", "Ljava/net/InetAddress;"); 1358 ScopedLocalRef<jobject> javaSource(env, env->GetObjectField(javaGroupSourceReq, gsrSourceFid)); 1359 if (!inetAddressToSockaddrVerbatim(env, javaSource.get(), 0, req.gsr_source, sa_len)) { 1360 return; 1361 } 1362 1363 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1364 int rc = TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req, sizeof(req))); 1365 if (rc == -1 && errno == EINVAL) { 1366 // Maybe we're a 32-bit binary talking to a 64-bit kernel? 1367 // glibc doesn't automatically handle this. 1368 // http://sourceware.org/bugzilla/show_bug.cgi?id=12080 1369 struct group_source_req64 { 1370 uint32_t gsr_interface; 1371 uint32_t my_padding; 1372 sockaddr_storage gsr_group; 1373 sockaddr_storage gsr_source; 1374 }; 1375 group_source_req64 req64; 1376 req64.gsr_interface = req.gsr_interface; 1377 memcpy(&req64.gsr_group, &req.gsr_group, sizeof(req.gsr_group)); 1378 memcpy(&req64.gsr_source, &req.gsr_source, sizeof(req.gsr_source)); 1379 rc = TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req64, sizeof(req64))); 1380 } 1381 throwIfMinusOne(env, "setsockopt", rc); 1382 } 1383 #endif 1384 1385 static void Posix_setsockoptLinger(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jobject javaLinger) { 1386 static jfieldID lOnoffFid = env->GetFieldID(JniConstants::structLingerClass, "l_onoff", "I"); 1387 static jfieldID lLingerFid = env->GetFieldID(JniConstants::structLingerClass, "l_linger", "I"); 1388 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1389 struct linger value; 1390 value.l_onoff = env->GetIntField(javaLinger, lOnoffFid); 1391 value.l_linger = env->GetIntField(javaLinger, lLingerFid); 1392 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &value, sizeof(value)))); 1393 } 1394 1395 static void Posix_setsockoptTimeval(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jobject javaTimeval) { 1396 static jfieldID tvSecFid = env->GetFieldID(JniConstants::structTimevalClass, "tv_sec", "J"); 1397 static jfieldID tvUsecFid = env->GetFieldID(JniConstants::structTimevalClass, "tv_usec", "J"); 1398 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1399 struct timeval value; 1400 value.tv_sec = env->GetLongField(javaTimeval, tvSecFid); 1401 value.tv_usec = env->GetLongField(javaTimeval, tvUsecFid); 1402 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &value, sizeof(value)))); 1403 } 1404 1405 static void Posix_setuid(JNIEnv* env, jobject, jint uid) { 1406 throwIfMinusOne(env, "setuid", TEMP_FAILURE_RETRY(setuid(uid))); 1407 } 1408 1409 static void Posix_shutdown(JNIEnv* env, jobject, jobject javaFd, jint how) { 1410 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1411 throwIfMinusOne(env, "shutdown", TEMP_FAILURE_RETRY(shutdown(fd, how))); 1412 } 1413 1414 static jobject Posix_socket(JNIEnv* env, jobject, jint domain, jint type, jint protocol) { 1415 int fd = throwIfMinusOne(env, "socket", TEMP_FAILURE_RETRY(socket(domain, type, protocol))); 1416 return fd != -1 ? jniCreateFileDescriptor(env, fd) : NULL; 1417 } 1418 1419 static void Posix_socketpair(JNIEnv* env, jobject, jint domain, jint type, jint protocol, jobject javaFd1, jobject javaFd2) { 1420 int fds[2]; 1421 int rc = throwIfMinusOne(env, "socketpair", TEMP_FAILURE_RETRY(socketpair(domain, type, protocol, fds))); 1422 if (rc != -1) { 1423 jniSetFileDescriptorOfFD(env, javaFd1, fds[0]); 1424 jniSetFileDescriptorOfFD(env, javaFd2, fds[1]); 1425 } 1426 } 1427 1428 static jobject Posix_stat(JNIEnv* env, jobject, jstring javaPath) { 1429 return doStat(env, javaPath, false); 1430 } 1431 1432 static jobject Posix_statvfs(JNIEnv* env, jobject, jstring javaPath) { 1433 ScopedUtfChars path(env, javaPath); 1434 if (path.c_str() == NULL) { 1435 return NULL; 1436 } 1437 struct statvfs sb; 1438 int rc = TEMP_FAILURE_RETRY(statvfs(path.c_str(), &sb)); 1439 if (rc == -1) { 1440 throwErrnoException(env, "statvfs"); 1441 return NULL; 1442 } 1443 return makeStructStatVfs(env, sb); 1444 } 1445 1446 static jstring Posix_strerror(JNIEnv* env, jobject, jint errnum) { 1447 char buffer[BUFSIZ]; 1448 const char* message = jniStrError(errnum, buffer, sizeof(buffer)); 1449 return env->NewStringUTF(message); 1450 } 1451 1452 static jstring Posix_strsignal(JNIEnv* env, jobject, jint signal) { 1453 return env->NewStringUTF(strsignal(signal)); 1454 } 1455 1456 static void Posix_symlink(JNIEnv* env, jobject, jstring javaOldPath, jstring javaNewPath) { 1457 ScopedUtfChars oldPath(env, javaOldPath); 1458 if (oldPath.c_str() == NULL) { 1459 return; 1460 } 1461 ScopedUtfChars newPath(env, javaNewPath); 1462 if (newPath.c_str() == NULL) { 1463 return; 1464 } 1465 throwIfMinusOne(env, "symlink", TEMP_FAILURE_RETRY(symlink(oldPath.c_str(), newPath.c_str()))); 1466 } 1467 1468 static jlong Posix_sysconf(JNIEnv* env, jobject, jint name) { 1469 // Since -1 is a valid result from sysconf(3), detecting failure is a little more awkward. 1470 errno = 0; 1471 long result = sysconf(name); 1472 if (result == -1L && errno == EINVAL) { 1473 throwErrnoException(env, "sysconf"); 1474 } 1475 return result; 1476 } 1477 1478 static void Posix_tcdrain(JNIEnv* env, jobject, jobject javaFd) { 1479 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1480 throwIfMinusOne(env, "tcdrain", TEMP_FAILURE_RETRY(tcdrain(fd))); 1481 } 1482 1483 static void Posix_tcsendbreak(JNIEnv* env, jobject, jobject javaFd, jint duration) { 1484 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1485 throwIfMinusOne(env, "tcsendbreak", TEMP_FAILURE_RETRY(tcsendbreak(fd, duration))); 1486 } 1487 1488 static jint Posix_umaskImpl(JNIEnv*, jobject, jint mask) { 1489 return umask(mask); 1490 } 1491 1492 static jobject Posix_uname(JNIEnv* env, jobject) { 1493 struct utsname buf; 1494 if (TEMP_FAILURE_RETRY(uname(&buf)) == -1) { 1495 return NULL; // Can't happen. 1496 } 1497 return makeStructUtsname(env, buf); 1498 } 1499 1500 static void Posix_unsetenv(JNIEnv* env, jobject, jstring javaName) { 1501 ScopedUtfChars name(env, javaName); 1502 if (name.c_str() == NULL) { 1503 return; 1504 } 1505 throwIfMinusOne(env, "unsetenv", unsetenv(name.c_str())); 1506 } 1507 1508 static jint Posix_waitpid(JNIEnv* env, jobject, jint pid, jobject javaStatus, jint options) { 1509 int status; 1510 int rc = throwIfMinusOne(env, "waitpid", TEMP_FAILURE_RETRY(waitpid(pid, &status, options))); 1511 if (rc != -1) { 1512 static jfieldID valueFid = env->GetFieldID(JniConstants::mutableIntClass, "value", "I"); 1513 env->SetIntField(javaStatus, valueFid, status); 1514 } 1515 return rc; 1516 } 1517 1518 static jint Posix_writeBytes(JNIEnv* env, jobject, jobject javaFd, jbyteArray javaBytes, jint byteOffset, jint byteCount) { 1519 ScopedBytesRO bytes(env, javaBytes); 1520 if (bytes.get() == NULL) { 1521 return -1; 1522 } 1523 return IO_FAILURE_RETRY(env, ssize_t, write, javaFd, bytes.get() + byteOffset, byteCount); 1524 } 1525 1526 static jint Posix_writev(JNIEnv* env, jobject, jobject javaFd, jobjectArray buffers, jintArray offsets, jintArray byteCounts) { 1527 IoVec<ScopedBytesRO> ioVec(env, env->GetArrayLength(buffers)); 1528 if (!ioVec.init(buffers, offsets, byteCounts)) { 1529 return -1; 1530 } 1531 return IO_FAILURE_RETRY(env, ssize_t, writev, javaFd, ioVec.get(), ioVec.size()); 1532 } 1533 1534 static JNINativeMethod gMethods[] = { 1535 NATIVE_METHOD(Posix, accept, "(Ljava/io/FileDescriptor;Ljava/net/InetSocketAddress;)Ljava/io/FileDescriptor;"), 1536 NATIVE_METHOD(Posix, access, "(Ljava/lang/String;I)Z"), 1537 NATIVE_METHOD(Posix, android_getaddrinfo, "(Ljava/lang/String;Landroid/system/StructAddrinfo;I)[Ljava/net/InetAddress;"), 1538 NATIVE_METHOD(Posix, bind, "(Ljava/io/FileDescriptor;Ljava/net/InetAddress;I)V"), 1539 NATIVE_METHOD(Posix, chmod, "(Ljava/lang/String;I)V"), 1540 NATIVE_METHOD(Posix, chown, "(Ljava/lang/String;II)V"), 1541 NATIVE_METHOD(Posix, close, "(Ljava/io/FileDescriptor;)V"), 1542 NATIVE_METHOD(Posix, connect, "(Ljava/io/FileDescriptor;Ljava/net/InetAddress;I)V"), 1543 NATIVE_METHOD(Posix, dup, "(Ljava/io/FileDescriptor;)Ljava/io/FileDescriptor;"), 1544 NATIVE_METHOD(Posix, dup2, "(Ljava/io/FileDescriptor;I)Ljava/io/FileDescriptor;"), 1545 NATIVE_METHOD(Posix, environ, "()[Ljava/lang/String;"), 1546 NATIVE_METHOD(Posix, execv, "(Ljava/lang/String;[Ljava/lang/String;)V"), 1547 NATIVE_METHOD(Posix, execve, "(Ljava/lang/String;[Ljava/lang/String;[Ljava/lang/String;)V"), 1548 NATIVE_METHOD(Posix, fchmod, "(Ljava/io/FileDescriptor;I)V"), 1549 NATIVE_METHOD(Posix, fchown, "(Ljava/io/FileDescriptor;II)V"), 1550 NATIVE_METHOD(Posix, fcntlVoid, "(Ljava/io/FileDescriptor;I)I"), 1551 NATIVE_METHOD(Posix, fcntlLong, "(Ljava/io/FileDescriptor;IJ)I"), 1552 NATIVE_METHOD(Posix, fcntlFlock, "(Ljava/io/FileDescriptor;ILandroid/system/StructFlock;)I"), 1553 NATIVE_METHOD(Posix, fdatasync, "(Ljava/io/FileDescriptor;)V"), 1554 NATIVE_METHOD(Posix, fstat, "(Ljava/io/FileDescriptor;)Landroid/system/StructStat;"), 1555 NATIVE_METHOD(Posix, fstatvfs, "(Ljava/io/FileDescriptor;)Landroid/system/StructStatVfs;"), 1556 NATIVE_METHOD(Posix, fsync, "(Ljava/io/FileDescriptor;)V"), 1557 NATIVE_METHOD(Posix, ftruncate, "(Ljava/io/FileDescriptor;J)V"), 1558 NATIVE_METHOD(Posix, gai_strerror, "(I)Ljava/lang/String;"), 1559 NATIVE_METHOD(Posix, getegid, "()I"), 1560 NATIVE_METHOD(Posix, geteuid, "()I"), 1561 NATIVE_METHOD(Posix, getgid, "()I"), 1562 NATIVE_METHOD(Posix, getenv, "(Ljava/lang/String;)Ljava/lang/String;"), 1563 NATIVE_METHOD(Posix, getnameinfo, "(Ljava/net/InetAddress;I)Ljava/lang/String;"), 1564 NATIVE_METHOD(Posix, getpeername, "(Ljava/io/FileDescriptor;)Ljava/net/SocketAddress;"), 1565 NATIVE_METHOD(Posix, getpid, "()I"), 1566 NATIVE_METHOD(Posix, getppid, "()I"), 1567 NATIVE_METHOD(Posix, getpwnam, "(Ljava/lang/String;)Landroid/system/StructPasswd;"), 1568 NATIVE_METHOD(Posix, getpwuid, "(I)Landroid/system/StructPasswd;"), 1569 NATIVE_METHOD(Posix, getsockname, "(Ljava/io/FileDescriptor;)Ljava/net/SocketAddress;"), 1570 NATIVE_METHOD(Posix, getsockoptByte, "(Ljava/io/FileDescriptor;II)I"), 1571 NATIVE_METHOD(Posix, getsockoptInAddr, "(Ljava/io/FileDescriptor;II)Ljava/net/InetAddress;"), 1572 NATIVE_METHOD(Posix, getsockoptInt, "(Ljava/io/FileDescriptor;II)I"), 1573 NATIVE_METHOD(Posix, getsockoptLinger, "(Ljava/io/FileDescriptor;II)Landroid/system/StructLinger;"), 1574 NATIVE_METHOD(Posix, getsockoptTimeval, "(Ljava/io/FileDescriptor;II)Landroid/system/StructTimeval;"), 1575 NATIVE_METHOD(Posix, getsockoptUcred, "(Ljava/io/FileDescriptor;II)Landroid/system/StructUcred;"), 1576 NATIVE_METHOD(Posix, gettid, "()I"), 1577 NATIVE_METHOD(Posix, getuid, "()I"), 1578 NATIVE_METHOD(Posix, if_indextoname, "(I)Ljava/lang/String;"), 1579 NATIVE_METHOD(Posix, inet_pton, "(ILjava/lang/String;)Ljava/net/InetAddress;"), 1580 NATIVE_METHOD(Posix, ioctlInetAddress, "(Ljava/io/FileDescriptor;ILjava/lang/String;)Ljava/net/InetAddress;"), 1581 NATIVE_METHOD(Posix, ioctlInt, "(Ljava/io/FileDescriptor;ILandroid/util/MutableInt;)I"), 1582 NATIVE_METHOD(Posix, isatty, "(Ljava/io/FileDescriptor;)Z"), 1583 NATIVE_METHOD(Posix, kill, "(II)V"), 1584 NATIVE_METHOD(Posix, lchown, "(Ljava/lang/String;II)V"), 1585 NATIVE_METHOD(Posix, link, "(Ljava/lang/String;Ljava/lang/String;)V"), 1586 NATIVE_METHOD(Posix, listen, "(Ljava/io/FileDescriptor;I)V"), 1587 NATIVE_METHOD(Posix, lseek, "(Ljava/io/FileDescriptor;JI)J"), 1588 NATIVE_METHOD(Posix, lstat, "(Ljava/lang/String;)Landroid/system/StructStat;"), 1589 NATIVE_METHOD(Posix, mincore, "(JJ[B)V"), 1590 NATIVE_METHOD(Posix, mkdir, "(Ljava/lang/String;I)V"), 1591 NATIVE_METHOD(Posix, mkfifo, "(Ljava/lang/String;I)V"), 1592 NATIVE_METHOD(Posix, mlock, "(JJ)V"), 1593 NATIVE_METHOD(Posix, mmap, "(JJIILjava/io/FileDescriptor;J)J"), 1594 NATIVE_METHOD(Posix, msync, "(JJI)V"), 1595 NATIVE_METHOD(Posix, munlock, "(JJ)V"), 1596 NATIVE_METHOD(Posix, munmap, "(JJ)V"), 1597 NATIVE_METHOD(Posix, open, "(Ljava/lang/String;II)Ljava/io/FileDescriptor;"), 1598 NATIVE_METHOD(Posix, pipe, "()[Ljava/io/FileDescriptor;"), 1599 NATIVE_METHOD(Posix, poll, "([Landroid/system/StructPollfd;I)I"), 1600 NATIVE_METHOD(Posix, posix_fallocate, "(Ljava/io/FileDescriptor;JJ)V"), 1601 NATIVE_METHOD(Posix, prctl, "(IJJJJ)I"), 1602 NATIVE_METHOD(Posix, preadBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIJ)I"), 1603 NATIVE_METHOD(Posix, pwriteBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIJ)I"), 1604 NATIVE_METHOD(Posix, readBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;II)I"), 1605 NATIVE_METHOD(Posix, readlink, "(Ljava/lang/String;)Ljava/lang/String;"), 1606 NATIVE_METHOD(Posix, readv, "(Ljava/io/FileDescriptor;[Ljava/lang/Object;[I[I)I"), 1607 NATIVE_METHOD(Posix, recvfromBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIILjava/net/InetSocketAddress;)I"), 1608 NATIVE_METHOD(Posix, remove, "(Ljava/lang/String;)V"), 1609 NATIVE_METHOD(Posix, rename, "(Ljava/lang/String;Ljava/lang/String;)V"), 1610 NATIVE_METHOD(Posix, sendfile, "(Ljava/io/FileDescriptor;Ljava/io/FileDescriptor;Landroid/util/MutableLong;J)J"), 1611 NATIVE_METHOD(Posix, sendtoBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIILjava/net/InetAddress;I)I"), 1612 NATIVE_METHOD(Posix, setegid, "(I)V"), 1613 NATIVE_METHOD(Posix, setenv, "(Ljava/lang/String;Ljava/lang/String;Z)V"), 1614 NATIVE_METHOD(Posix, seteuid, "(I)V"), 1615 NATIVE_METHOD(Posix, setgid, "(I)V"), 1616 NATIVE_METHOD(Posix, setsid, "()I"), 1617 NATIVE_METHOD(Posix, setsockoptByte, "(Ljava/io/FileDescriptor;III)V"), 1618 NATIVE_METHOD(Posix, setsockoptIfreq, "(Ljava/io/FileDescriptor;IILjava/lang/String;)V"), 1619 NATIVE_METHOD(Posix, setsockoptInt, "(Ljava/io/FileDescriptor;III)V"), 1620 NATIVE_METHOD(Posix, setsockoptIpMreqn, "(Ljava/io/FileDescriptor;III)V"), 1621 NATIVE_METHOD(Posix, setsockoptGroupReq, "(Ljava/io/FileDescriptor;IILandroid/system/StructGroupReq;)V"), 1622 NATIVE_METHOD(Posix, setsockoptGroupSourceReq, "(Ljava/io/FileDescriptor;IILandroid/system/StructGroupSourceReq;)V"), 1623 NATIVE_METHOD(Posix, setsockoptLinger, "(Ljava/io/FileDescriptor;IILandroid/system/StructLinger;)V"), 1624 NATIVE_METHOD(Posix, setsockoptTimeval, "(Ljava/io/FileDescriptor;IILandroid/system/StructTimeval;)V"), 1625 NATIVE_METHOD(Posix, setuid, "(I)V"), 1626 NATIVE_METHOD(Posix, shutdown, "(Ljava/io/FileDescriptor;I)V"), 1627 NATIVE_METHOD(Posix, socket, "(III)Ljava/io/FileDescriptor;"), 1628 NATIVE_METHOD(Posix, socketpair, "(IIILjava/io/FileDescriptor;Ljava/io/FileDescriptor;)V"), 1629 NATIVE_METHOD(Posix, stat, "(Ljava/lang/String;)Landroid/system/StructStat;"), 1630 NATIVE_METHOD(Posix, statvfs, "(Ljava/lang/String;)Landroid/system/StructStatVfs;"), 1631 NATIVE_METHOD(Posix, strerror, "(I)Ljava/lang/String;"), 1632 NATIVE_METHOD(Posix, strsignal, "(I)Ljava/lang/String;"), 1633 NATIVE_METHOD(Posix, symlink, "(Ljava/lang/String;Ljava/lang/String;)V"), 1634 NATIVE_METHOD(Posix, sysconf, "(I)J"), 1635 NATIVE_METHOD(Posix, tcdrain, "(Ljava/io/FileDescriptor;)V"), 1636 NATIVE_METHOD(Posix, tcsendbreak, "(Ljava/io/FileDescriptor;I)V"), 1637 NATIVE_METHOD(Posix, umaskImpl, "(I)I"), 1638 NATIVE_METHOD(Posix, uname, "()Landroid/system/StructUtsname;"), 1639 NATIVE_METHOD(Posix, unsetenv, "(Ljava/lang/String;)V"), 1640 NATIVE_METHOD(Posix, waitpid, "(ILandroid/util/MutableInt;I)I"), 1641 NATIVE_METHOD(Posix, writeBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;II)I"), 1642 NATIVE_METHOD(Posix, writev, "(Ljava/io/FileDescriptor;[Ljava/lang/Object;[I[I)I"), 1643 }; 1644 void register_libcore_io_Posix(JNIEnv* env) { 1645 jniRegisterNativeMethods(env, "libcore/io/Posix", gMethods, NELEM(gMethods)); 1646 } 1647
