libcore_io_Linux.cpp revision 108091b6787f37a23862c7c9bb965ccf932430ab
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 "Linux" 18 19#include <arpa/inet.h> 20#include <errno.h> 21#include <fcntl.h> 22#include <ifaddrs.h> 23#include <linux/rtnetlink.h> 24#include <net/if.h> 25#include <netdb.h> 26#include <netinet/in.h> 27#include <netpacket/packet.h> 28#include <poll.h> 29#include <pwd.h> 30#include <signal.h> 31#include <stdlib.h> 32#include <sys/capability.h> 33#include <sys/ioctl.h> 34#include <sys/mman.h> 35#include <sys/prctl.h> 36#include <sys/socket.h> 37#include <sys/stat.h> 38#include <sys/syscall.h> 39#include <sys/time.h> 40#include <sys/types.h> 41#include <sys/uio.h> 42#include <sys/un.h> 43#include <sys/utsname.h> 44#include <sys/wait.h> 45#include <sys/xattr.h> 46#include <termios.h> 47#include <unistd.h> 48 49#include <memory> 50 51#include <android-base/file.h> 52#include <android-base/strings.h> 53#include <log/log.h> 54 55#include "AsynchronousCloseMonitor.h" 56#include "ExecStrings.h" 57#include "JNIHelp.h" 58#include "JniConstants.h" 59#include "JniException.h" 60#include "NetworkUtilities.h" 61#include "Portability.h" 62#include "ScopedBytes.h" 63#include "ScopedLocalRef.h" 64#include "ScopedPrimitiveArray.h" 65#include "ScopedUtfChars.h" 66#include "toStringArray.h" 67 68#ifndef __unused 69#define __unused __attribute__((__unused__)) 70#endif 71 72#define TO_JAVA_STRING(NAME, EXP) \ 73 jstring NAME = env->NewStringUTF(EXP); \ 74 if ((NAME) == NULL) return NULL; 75 76struct addrinfo_deleter { 77 void operator()(addrinfo* p) const { 78 if (p != NULL) { // bionic's freeaddrinfo(3) crashes when passed NULL. 79 freeaddrinfo(p); 80 } 81 } 82}; 83 84struct c_deleter { 85 void operator()(void* p) const { 86 free(p); 87 } 88}; 89 90static bool isIPv4MappedAddress(const sockaddr *sa) { 91 const sockaddr_in6 *sin6 = reinterpret_cast<const sockaddr_in6*>(sa); 92 return sa != NULL && sa->sa_family == AF_INET6 && 93 (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) || 94 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)); // We map 0.0.0.0 to ::, so :: is mapped. 95} 96 97/** 98 * Perform a socket operation that specifies an IP address, possibly falling back from specifying 99 * the address as an IPv4-mapped IPv6 address in a struct sockaddr_in6 to specifying it as an IPv4 100 * address in a struct sockaddr_in. 101 * 102 * This is needed because all sockets created by the java.net APIs are IPv6 sockets, and on those 103 * sockets, IPv4 operations use IPv4-mapped addresses stored in a struct sockaddr_in6. But sockets 104 * created using Linux.socket(AF_INET, ...) are IPv4 sockets and only support operations using IPv4 105 * socket addresses structures. 106 */ 107#define NET_IPV4_FALLBACK(jni_env, return_type, syscall_name, java_fd, java_addr, port, null_addr_ok, args...) ({ \ 108 return_type _rc = -1; \ 109 do { \ 110 sockaddr_storage _ss; \ 111 socklen_t _salen; \ 112 if ((java_addr) == NULL && (null_addr_ok)) { \ 113 /* No IP address specified (e.g., sendto() on a connected socket). */ \ 114 _salen = 0; \ 115 } else if (!inetAddressToSockaddr(jni_env, java_addr, port, _ss, _salen)) { \ 116 /* Invalid socket address, return -1. inetAddressToSockaddr has already thrown. */ \ 117 break; \ 118 } \ 119 sockaddr* _sa = _salen ? reinterpret_cast<sockaddr*>(&_ss) : NULL; \ 120 /* inetAddressToSockaddr always returns an IPv6 sockaddr. Assume that java_fd was created \ 121 * by Java API calls, which always create IPv6 socket fds, and pass it in as is. */ \ 122 _rc = NET_FAILURE_RETRY(jni_env, return_type, syscall_name, java_fd, ##args, _sa, _salen); \ 123 if (_rc == -1 && errno == EAFNOSUPPORT && _salen && isIPv4MappedAddress(_sa)) { \ 124 /* We passed in an IPv4 address in an IPv6 sockaddr and the kernel told us that we got \ 125 * the address family wrong. Pass in the same address in an IPv4 sockaddr. */ \ 126 (jni_env)->ExceptionClear(); \ 127 if (!inetAddressToSockaddrVerbatim(jni_env, java_addr, port, _ss, _salen)) { \ 128 break; \ 129 } \ 130 _sa = reinterpret_cast<sockaddr*>(&_ss); \ 131 _rc = NET_FAILURE_RETRY(jni_env, return_type, syscall_name, java_fd, ##args, _sa, _salen); \ 132 } \ 133 } while (0); \ 134 _rc; }) \ 135 136/** 137 * Used to retry networking system calls that can be interrupted with a signal. Unlike 138 * TEMP_FAILURE_RETRY, this also handles the case where 139 * AsynchronousCloseMonitor::signalBlockedThreads(fd) is used to signal a close() or 140 * Thread.interrupt(). Other signals that result in an EINTR result are ignored and the system call 141 * is retried. 142 * 143 * Returns the result of the system call though a Java exception will be pending if the result is 144 * -1: a SocketException if signaled via AsynchronousCloseMonitor, or ErrnoException for other 145 * failures. 146 */ 147#define NET_FAILURE_RETRY(jni_env, return_type, syscall_name, java_fd, ...) ({ \ 148 return_type _rc = -1; \ 149 int _syscallErrno; \ 150 do { \ 151 bool _wasSignaled; \ 152 { \ 153 int _fd = jniGetFDFromFileDescriptor(jni_env, java_fd); \ 154 AsynchronousCloseMonitor _monitor(_fd); \ 155 _rc = syscall_name(_fd, __VA_ARGS__); \ 156 _syscallErrno = errno; \ 157 _wasSignaled = _monitor.wasSignaled(); \ 158 } \ 159 if (_wasSignaled) { \ 160 jniThrowException(jni_env, "java/net/SocketException", "Socket closed"); \ 161 _rc = -1; \ 162 break; \ 163 } \ 164 if (_rc == -1 && _syscallErrno != EINTR) { \ 165 /* TODO: with a format string we could show the arguments too, like strace(1). */ \ 166 throwErrnoException(jni_env, # syscall_name); \ 167 break; \ 168 } \ 169 } while (_rc == -1); /* _syscallErrno == EINTR && !_wasSignaled */ \ 170 if (_rc == -1) { \ 171 /* If the syscall failed, re-set errno: throwing an exception might have modified it. */ \ 172 errno = _syscallErrno; \ 173 } \ 174 _rc; }) 175 176/** 177 * Used to retry system calls that can be interrupted with a signal. Unlike TEMP_FAILURE_RETRY, this 178 * also handles the case where AsynchronousCloseMonitor::signalBlockedThreads(fd) is used to signal 179 * a close() or Thread.interrupt(). Other signals that result in an EINTR result are ignored and the 180 * system call is retried. 181 * 182 * Returns the result of the system call though a Java exception will be pending if the result is 183 * -1: an IOException if the file descriptor is already closed, a InterruptedIOException if signaled 184 * via AsynchronousCloseMonitor, or ErrnoException for other failures. 185 */ 186#define IO_FAILURE_RETRY(jni_env, return_type, syscall_name, java_fd, ...) ({ \ 187 return_type _rc = -1; \ 188 int _syscallErrno; \ 189 do { \ 190 bool _wasSignaled; \ 191 { \ 192 int _fd = jniGetFDFromFileDescriptor(jni_env, java_fd); \ 193 AsynchronousCloseMonitor _monitor(_fd); \ 194 _rc = syscall_name(_fd, __VA_ARGS__); \ 195 _syscallErrno = errno; \ 196 _wasSignaled = _monitor.wasSignaled(); \ 197 } \ 198 if (_wasSignaled) { \ 199 jniThrowException(jni_env, "java/io/InterruptedIOException", # syscall_name " interrupted"); \ 200 _rc = -1; \ 201 break; \ 202 } \ 203 if (_rc == -1 && _syscallErrno != EINTR) { \ 204 /* TODO: with a format string we could show the arguments too, like strace(1). */ \ 205 throwErrnoException(jni_env, # syscall_name); \ 206 break; \ 207 } \ 208 } while (_rc == -1); /* && _syscallErrno == EINTR && !_wasSignaled */ \ 209 if (_rc == -1) { \ 210 /* If the syscall failed, re-set errno: throwing an exception might have modified it. */ \ 211 errno = _syscallErrno; \ 212 } \ 213 _rc; }) 214 215#define NULL_ADDR_OK true 216#define NULL_ADDR_FORBIDDEN false 217 218static void throwException(JNIEnv* env, jclass exceptionClass, jmethodID ctor3, jmethodID ctor2, 219 const char* functionName, int error) { 220 jthrowable cause = NULL; 221 if (env->ExceptionCheck()) { 222 cause = env->ExceptionOccurred(); 223 env->ExceptionClear(); 224 } 225 226 ScopedLocalRef<jstring> detailMessage(env, env->NewStringUTF(functionName)); 227 if (detailMessage.get() == NULL) { 228 // Not really much we can do here. We're probably dead in the water, 229 // but let's try to stumble on... 230 env->ExceptionClear(); 231 } 232 233 jobject exception; 234 if (cause != NULL) { 235 exception = env->NewObject(exceptionClass, ctor3, detailMessage.get(), error, cause); 236 } else { 237 exception = env->NewObject(exceptionClass, ctor2, detailMessage.get(), error); 238 } 239 env->Throw(reinterpret_cast<jthrowable>(exception)); 240} 241 242static void throwErrnoException(JNIEnv* env, const char* functionName) { 243 int error = errno; 244 static jmethodID ctor3 = env->GetMethodID(JniConstants::errnoExceptionClass, 245 "<init>", "(Ljava/lang/String;ILjava/lang/Throwable;)V"); 246 static jmethodID ctor2 = env->GetMethodID(JniConstants::errnoExceptionClass, 247 "<init>", "(Ljava/lang/String;I)V"); 248 throwException(env, JniConstants::errnoExceptionClass, ctor3, ctor2, functionName, error); 249} 250 251static void throwGaiException(JNIEnv* env, const char* functionName, int error) { 252 // Cache the methods ids before we throw, so we don't call GetMethodID with a pending exception. 253 static jmethodID ctor3 = env->GetMethodID(JniConstants::gaiExceptionClass, "<init>", 254 "(Ljava/lang/String;ILjava/lang/Throwable;)V"); 255 static jmethodID ctor2 = env->GetMethodID(JniConstants::gaiExceptionClass, "<init>", 256 "(Ljava/lang/String;I)V"); 257 if (errno != 0) { 258 // EAI_SYSTEM should mean "look at errno instead", but both glibc and bionic seem to 259 // mess this up. In particular, if you don't have INTERNET permission, errno will be EACCES 260 // but you'll get EAI_NONAME or EAI_NODATA. So we want our GaiException to have a 261 // potentially-relevant ErrnoException as its cause even if error != EAI_SYSTEM. 262 // http://code.google.com/p/android/issues/detail?id=15722 263 throwErrnoException(env, functionName); 264 // Deliberately fall through to throw another exception... 265 } 266 throwException(env, JniConstants::gaiExceptionClass, ctor3, ctor2, functionName, error); 267} 268 269template <typename rc_t> 270static rc_t throwIfMinusOne(JNIEnv* env, const char* name, rc_t rc) { 271 if (rc == rc_t(-1)) { 272 throwErrnoException(env, name); 273 } 274 return rc; 275} 276 277template <typename ScopedT> 278class IoVec { 279public: 280 IoVec(JNIEnv* env, size_t bufferCount) : mEnv(env), mBufferCount(bufferCount) { 281 } 282 283 bool init(jobjectArray javaBuffers, jintArray javaOffsets, jintArray javaByteCounts) { 284 // We can't delete our local references until after the I/O, so make sure we have room. 285 if (mEnv->PushLocalFrame(mBufferCount + 16) < 0) { 286 return false; 287 } 288 ScopedIntArrayRO offsets(mEnv, javaOffsets); 289 if (offsets.get() == NULL) { 290 return false; 291 } 292 ScopedIntArrayRO byteCounts(mEnv, javaByteCounts); 293 if (byteCounts.get() == NULL) { 294 return false; 295 } 296 // TODO: Linux actually has a 1024 buffer limit. glibc works around this, and we should too. 297 // TODO: you can query the limit at runtime with sysconf(_SC_IOV_MAX). 298 for (size_t i = 0; i < mBufferCount; ++i) { 299 jobject buffer = mEnv->GetObjectArrayElement(javaBuffers, i); // We keep this local ref. 300 mScopedBuffers.push_back(new ScopedT(mEnv, buffer)); 301 jbyte* ptr = const_cast<jbyte*>(mScopedBuffers.back()->get()); 302 if (ptr == NULL) { 303 return false; 304 } 305 struct iovec iov; 306 iov.iov_base = reinterpret_cast<void*>(ptr + offsets[i]); 307 iov.iov_len = byteCounts[i]; 308 mIoVec.push_back(iov); 309 } 310 return true; 311 } 312 313 ~IoVec() { 314 for (size_t i = 0; i < mScopedBuffers.size(); ++i) { 315 delete mScopedBuffers[i]; 316 } 317 mEnv->PopLocalFrame(NULL); 318 } 319 320 iovec* get() { 321 return &mIoVec[0]; 322 } 323 324 size_t size() { 325 return mBufferCount; 326 } 327 328private: 329 JNIEnv* mEnv; 330 size_t mBufferCount; 331 std::vector<iovec> mIoVec; 332 std::vector<ScopedT*> mScopedBuffers; 333}; 334 335/** 336 * Returns a jbyteArray containing the sockaddr_un.sun_path from ss. As per unix(7) sa_len should be 337 * the length of ss as returned by getsockname(2), getpeername(2), or accept(2). 338 * If the returned array is of length 0 the sockaddr_un refers to an unnamed socket. 339 * A null pointer is returned in the event of an error. See unix(7) for more information. 340 */ 341static jbyteArray getUnixSocketPath(JNIEnv* env, const sockaddr_storage& ss, 342 const socklen_t& sa_len) { 343 if (ss.ss_family != AF_UNIX) { 344 jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException", 345 "getUnixSocketPath unsupported ss_family: %i", ss.ss_family); 346 return NULL; 347 } 348 349 const struct sockaddr_un* un_addr = reinterpret_cast<const struct sockaddr_un*>(&ss); 350 // The length of sun_path is sa_len minus the length of the overhead (ss_family). 351 // See unix(7) for details. This calculation must match that of socket_make_sockaddr_un() in 352 // socket_local_client.c and javaUnixSocketAddressToSockaddr() to interoperate. 353 size_t pathLength = sa_len - offsetof(struct sockaddr_un, sun_path); 354 355 jbyteArray javaSunPath = env->NewByteArray(pathLength); 356 if (javaSunPath == NULL) { 357 return NULL; 358 } 359 360 if (pathLength > 0) { 361 env->SetByteArrayRegion(javaSunPath, 0, pathLength, 362 reinterpret_cast<const jbyte*>(&un_addr->sun_path)); 363 } 364 return javaSunPath; 365} 366 367static jobject makeSocketAddress(JNIEnv* env, const sockaddr_storage& ss, const socklen_t sa_len) { 368 if (ss.ss_family == AF_INET || ss.ss_family == AF_INET6) { 369 jint port; 370 jobject inetAddress = sockaddrToInetAddress(env, ss, &port); 371 if (inetAddress == NULL) { 372 return NULL; // Exception already thrown. 373 } 374 static jmethodID ctor = env->GetMethodID(JniConstants::inetSocketAddressClass, 375 "<init>", "(Ljava/net/InetAddress;I)V"); 376 return env->NewObject(JniConstants::inetSocketAddressClass, ctor, inetAddress, port); 377 } else if (ss.ss_family == AF_UNIX) { 378 static jmethodID ctor = env->GetMethodID(JniConstants::unixSocketAddressClass, 379 "<init>", "([B)V"); 380 381 jbyteArray javaSunPath = getUnixSocketPath(env, ss, sa_len); 382 if (!javaSunPath) { 383 return NULL; 384 } 385 return env->NewObject(JniConstants::unixSocketAddressClass, ctor, javaSunPath); 386 } else if (ss.ss_family == AF_NETLINK) { 387 const struct sockaddr_nl* nl_addr = reinterpret_cast<const struct sockaddr_nl*>(&ss); 388 static jmethodID ctor = env->GetMethodID(JniConstants::netlinkSocketAddressClass, 389 "<init>", "(II)V"); 390 return env->NewObject(JniConstants::netlinkSocketAddressClass, ctor, 391 static_cast<jint>(nl_addr->nl_pid), 392 static_cast<jint>(nl_addr->nl_groups)); 393 } else if (ss.ss_family == AF_PACKET) { 394 const struct sockaddr_ll* sll = reinterpret_cast<const struct sockaddr_ll*>(&ss); 395 static jmethodID ctor = env->GetMethodID(JniConstants::packetSocketAddressClass, 396 "<init>", "(SISB[B)V"); 397 ScopedLocalRef<jbyteArray> byteArray(env, env->NewByteArray(sll->sll_halen)); 398 if (byteArray.get() == NULL) { 399 return NULL; 400 } 401 env->SetByteArrayRegion(byteArray.get(), 0, sll->sll_halen, 402 reinterpret_cast<const jbyte*>(sll->sll_addr)); 403 jobject packetSocketAddress = env->NewObject(JniConstants::packetSocketAddressClass, ctor, 404 static_cast<jshort>(ntohs(sll->sll_protocol)), 405 static_cast<jint>(sll->sll_ifindex), 406 static_cast<jshort>(sll->sll_hatype), 407 static_cast<jbyte>(sll->sll_pkttype), 408 byteArray.get()); 409 return packetSocketAddress; 410 } 411 jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException", "unsupported ss_family: %d", 412 ss.ss_family); 413 return NULL; 414} 415 416static jobject makeStructPasswd(JNIEnv* env, const struct passwd& pw) { 417 TO_JAVA_STRING(pw_name, pw.pw_name); 418 TO_JAVA_STRING(pw_dir, pw.pw_dir); 419 TO_JAVA_STRING(pw_shell, pw.pw_shell); 420 static jmethodID ctor = env->GetMethodID(JniConstants::structPasswdClass, "<init>", 421 "(Ljava/lang/String;IILjava/lang/String;Ljava/lang/String;)V"); 422 return env->NewObject(JniConstants::structPasswdClass, ctor, 423 pw_name, static_cast<jint>(pw.pw_uid), static_cast<jint>(pw.pw_gid), pw_dir, pw_shell); 424} 425 426static jobject makeStructTimespec(JNIEnv* env, const struct timespec& ts) { 427 static jmethodID ctor = env->GetMethodID(JniConstants::structTimespecClass, "<init>", 428 "(JJ)V"); 429 return env->NewObject(JniConstants::structTimespecClass, ctor, 430 static_cast<jlong>(ts.tv_sec), static_cast<jlong>(ts.tv_nsec)); 431} 432 433static jobject makeStructStat(JNIEnv* env, const struct stat64& sb) { 434 static jmethodID ctor = env->GetMethodID(JniConstants::structStatClass, "<init>", 435 "(JJIJIIJJLandroid/system/StructTimespec;Landroid/system/StructTimespec;Landroid/system/StructTimespec;JJ)V"); 436 return env->NewObject(JniConstants::structStatClass, ctor, 437 static_cast<jlong>(sb.st_dev), static_cast<jlong>(sb.st_ino), 438 static_cast<jint>(sb.st_mode), static_cast<jlong>(sb.st_nlink), 439 static_cast<jint>(sb.st_uid), static_cast<jint>(sb.st_gid), 440 static_cast<jlong>(sb.st_rdev), static_cast<jlong>(sb.st_size), 441 makeStructTimespec(env, sb.st_atim), makeStructTimespec(env, sb.st_mtim), 442 makeStructTimespec(env, sb.st_ctim), static_cast<jlong>(sb.st_blksize), 443 static_cast<jlong>(sb.st_blocks)); 444} 445 446static jobject makeStructStatVfs(JNIEnv* env, const struct statvfs& sb) { 447 static jmethodID ctor = env->GetMethodID(JniConstants::structStatVfsClass, "<init>", 448 "(JJJJJJJJJJJ)V"); 449 return env->NewObject(JniConstants::structStatVfsClass, ctor, 450 static_cast<jlong>(sb.f_bsize), 451 static_cast<jlong>(sb.f_frsize), 452 static_cast<jlong>(sb.f_blocks), 453 static_cast<jlong>(sb.f_bfree), 454 static_cast<jlong>(sb.f_bavail), 455 static_cast<jlong>(sb.f_files), 456 static_cast<jlong>(sb.f_ffree), 457 static_cast<jlong>(sb.f_favail), 458 static_cast<jlong>(sb.f_fsid), 459 static_cast<jlong>(sb.f_flag), 460 static_cast<jlong>(sb.f_namemax)); 461} 462 463static jobject makeStructLinger(JNIEnv* env, const struct linger& l) { 464 static jmethodID ctor = env->GetMethodID(JniConstants::structLingerClass, "<init>", "(II)V"); 465 return env->NewObject(JniConstants::structLingerClass, ctor, l.l_onoff, l.l_linger); 466} 467 468static jobject makeStructTimeval(JNIEnv* env, const struct timeval& tv) { 469 static jmethodID ctor = env->GetMethodID(JniConstants::structTimevalClass, "<init>", "(JJ)V"); 470 return env->NewObject(JniConstants::structTimevalClass, ctor, 471 static_cast<jlong>(tv.tv_sec), static_cast<jlong>(tv.tv_usec)); 472} 473 474static jobject makeStructUcred(JNIEnv* env, const struct ucred& u __unused) { 475 static jmethodID ctor = env->GetMethodID(JniConstants::structUcredClass, "<init>", "(III)V"); 476 return env->NewObject(JniConstants::structUcredClass, ctor, u.pid, u.uid, u.gid); 477} 478 479static jobject makeStructUtsname(JNIEnv* env, const struct utsname& buf) { 480 TO_JAVA_STRING(sysname, buf.sysname); 481 TO_JAVA_STRING(nodename, buf.nodename); 482 TO_JAVA_STRING(release, buf.release); 483 TO_JAVA_STRING(version, buf.version); 484 TO_JAVA_STRING(machine, buf.machine); 485 static jmethodID ctor = env->GetMethodID(JniConstants::structUtsnameClass, "<init>", 486 "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V"); 487 return env->NewObject(JniConstants::structUtsnameClass, ctor, 488 sysname, nodename, release, version, machine); 489}; 490 491static bool fillIfreq(JNIEnv* env, jstring javaInterfaceName, struct ifreq& req) { 492 ScopedUtfChars interfaceName(env, javaInterfaceName); 493 if (interfaceName.c_str() == NULL) { 494 return false; 495 } 496 memset(&req, 0, sizeof(req)); 497 strncpy(req.ifr_name, interfaceName.c_str(), sizeof(req.ifr_name)); 498 req.ifr_name[sizeof(req.ifr_name) - 1] = '\0'; 499 return true; 500} 501 502static bool fillUnixSocketAddress(JNIEnv* env, jobject javaUnixSocketAddress, 503 const sockaddr_storage& ss, const socklen_t& sa_len) { 504 if (javaUnixSocketAddress == NULL) { 505 return true; 506 } 507 jbyteArray javaSunPath = getUnixSocketPath(env, ss, sa_len); 508 if (!javaSunPath) { 509 return false; 510 } 511 512 static jfieldID sunPathFid = 513 env->GetFieldID(JniConstants::unixSocketAddressClass, "sun_path", "[B"); 514 env->SetObjectField(javaUnixSocketAddress, sunPathFid, javaSunPath); 515 return true; 516} 517 518static bool fillInetSocketAddress(JNIEnv* env, jobject javaInetSocketAddress, 519 const sockaddr_storage& ss) { 520 if (javaInetSocketAddress == NULL) { 521 return true; 522 } 523 // Fill out the passed-in InetSocketAddress with the sender's IP address and port number. 524 jint port; 525 jobject sender = sockaddrToInetAddress(env, ss, &port); 526 if (sender == NULL) { 527 return false; 528 } 529 static jfieldID holderFid = env->GetFieldID(JniConstants::inetSocketAddressClass, "holder", 530 "Ljava/net/InetSocketAddress$InetSocketAddressHolder;"); 531 jobject holder = env->GetObjectField(javaInetSocketAddress, holderFid); 532 533 static jfieldID addressFid = env->GetFieldID(JniConstants::inetSocketAddressHolderClass, 534 "addr", "Ljava/net/InetAddress;"); 535 static jfieldID portFid = env->GetFieldID(JniConstants::inetSocketAddressHolderClass, "port", "I"); 536 env->SetObjectField(holder, addressFid, sender); 537 env->SetIntField(holder, portFid, port); 538 return true; 539} 540 541static bool fillSocketAddress(JNIEnv* env, jobject javaSocketAddress, const sockaddr_storage& ss, 542 const socklen_t& sa_len) { 543 if (javaSocketAddress == NULL) { 544 return true; 545 } 546 547 if (env->IsInstanceOf(javaSocketAddress, JniConstants::inetSocketAddressClass)) { 548 return fillInetSocketAddress(env, javaSocketAddress, ss); 549 } else if (env->IsInstanceOf(javaSocketAddress, JniConstants::unixSocketAddressClass)) { 550 return fillUnixSocketAddress(env, javaSocketAddress, ss, sa_len); 551 } 552 jniThrowException(env, "java/lang/UnsupportedOperationException", 553 "unsupported SocketAddress subclass"); 554 return false; 555 556} 557 558static void javaInetSocketAddressToInetAddressAndPort( 559 JNIEnv* env, jobject javaInetSocketAddress, jobject& javaInetAddress, jint& port) { 560 static jfieldID holderFid = env->GetFieldID(JniConstants::inetSocketAddressClass, "holder", 561 "Ljava/net/InetSocketAddress$InetSocketAddressHolder;"); 562 jobject holder = env->GetObjectField(javaInetSocketAddress, holderFid); 563 564 static jfieldID addressFid = env->GetFieldID( 565 JniConstants::inetSocketAddressHolderClass, "addr", "Ljava/net/InetAddress;"); 566 static jfieldID portFid = env->GetFieldID(JniConstants::inetSocketAddressHolderClass, "port", "I"); 567 568 javaInetAddress = env->GetObjectField(holder, addressFid); 569 port = env->GetIntField(holder, portFid); 570} 571 572static bool javaInetSocketAddressToSockaddr( 573 JNIEnv* env, jobject javaSocketAddress, sockaddr_storage& ss, socklen_t& sa_len) { 574 jobject javaInetAddress; 575 jint port; 576 javaInetSocketAddressToInetAddressAndPort(env, javaSocketAddress, javaInetAddress, port); 577 return inetAddressToSockaddr(env, javaInetAddress, port, ss, sa_len); 578} 579 580static bool javaNetlinkSocketAddressToSockaddr( 581 JNIEnv* env, jobject javaSocketAddress, sockaddr_storage& ss, socklen_t& sa_len) { 582 static jfieldID nlPidFid = env->GetFieldID( 583 JniConstants::netlinkSocketAddressClass, "nlPortId", "I"); 584 static jfieldID nlGroupsFid = env->GetFieldID( 585 JniConstants::netlinkSocketAddressClass, "nlGroupsMask", "I"); 586 587 sockaddr_nl *nlAddr = reinterpret_cast<sockaddr_nl *>(&ss); 588 nlAddr->nl_family = AF_NETLINK; 589 nlAddr->nl_pid = env->GetIntField(javaSocketAddress, nlPidFid); 590 nlAddr->nl_groups = env->GetIntField(javaSocketAddress, nlGroupsFid); 591 sa_len = sizeof(sockaddr_nl); 592 return true; 593} 594 595static bool javaUnixSocketAddressToSockaddr( 596 JNIEnv* env, jobject javaUnixSocketAddress, sockaddr_storage& ss, socklen_t& sa_len) { 597 static jfieldID sunPathFid = env->GetFieldID( 598 JniConstants::unixSocketAddressClass, "sun_path", "[B"); 599 600 struct sockaddr_un* un_addr = reinterpret_cast<struct sockaddr_un*>(&ss); 601 memset (un_addr, 0, sizeof(sockaddr_un)); 602 un_addr->sun_family = AF_UNIX; 603 604 jbyteArray javaSunPath = (jbyteArray) env->GetObjectField(javaUnixSocketAddress, sunPathFid); 605 jsize pathLength = env->GetArrayLength(javaSunPath); 606 if ((size_t) pathLength > sizeof(sockaddr_un::sun_path)) { 607 jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException", 608 "sun_path too long: max=%i, is=%i", 609 sizeof(sockaddr_un::sun_path), pathLength); 610 return false; 611 } 612 env->GetByteArrayRegion(javaSunPath, 0, pathLength, (jbyte*) un_addr->sun_path); 613 // sa_len is sun_path plus the length of the overhead (ss_family_t). See unix(7) for 614 // details. This calculation must match that of socket_make_sockaddr_un() in 615 // socket_local_client.c and getUnixSocketPath() to interoperate. 616 sa_len = offsetof(struct sockaddr_un, sun_path) + pathLength; 617 return true; 618} 619 620static bool javaPacketSocketAddressToSockaddr( 621 JNIEnv* env, jobject javaSocketAddress, sockaddr_storage& ss, socklen_t& sa_len) { 622 static jfieldID protocolFid = env->GetFieldID( 623 JniConstants::packetSocketAddressClass, "sll_protocol", "S"); 624 static jfieldID ifindexFid = env->GetFieldID( 625 JniConstants::packetSocketAddressClass, "sll_ifindex", "I"); 626 static jfieldID hatypeFid = env->GetFieldID( 627 JniConstants::packetSocketAddressClass, "sll_hatype", "S"); 628 static jfieldID pkttypeFid = env->GetFieldID( 629 JniConstants::packetSocketAddressClass, "sll_pkttype", "B"); 630 static jfieldID addrFid = env->GetFieldID( 631 JniConstants::packetSocketAddressClass, "sll_addr", "[B"); 632 633 sockaddr_ll *sll = reinterpret_cast<sockaddr_ll *>(&ss); 634 sll->sll_family = AF_PACKET; 635 sll->sll_protocol = htons(env->GetShortField(javaSocketAddress, protocolFid)); 636 sll->sll_ifindex = env->GetIntField(javaSocketAddress, ifindexFid); 637 sll->sll_hatype = env->GetShortField(javaSocketAddress, hatypeFid); 638 sll->sll_pkttype = env->GetByteField(javaSocketAddress, pkttypeFid); 639 640 jbyteArray sllAddr = (jbyteArray) env->GetObjectField(javaSocketAddress, addrFid); 641 if (sllAddr == NULL) { 642 sll->sll_halen = 0; 643 memset(&sll->sll_addr, 0, sizeof(sll->sll_addr)); 644 } else { 645 jsize len = env->GetArrayLength(sllAddr); 646 if ((size_t) len > sizeof(sll->sll_addr)) { 647 len = sizeof(sll->sll_addr); 648 } 649 sll->sll_halen = len; 650 env->GetByteArrayRegion(sllAddr, 0, len, (jbyte*) sll->sll_addr); 651 } 652 sa_len = sizeof(sockaddr_ll); 653 return true; 654} 655 656static bool javaSocketAddressToSockaddr( 657 JNIEnv* env, jobject javaSocketAddress, sockaddr_storage& ss, socklen_t& sa_len) { 658 if (javaSocketAddress == NULL) { 659 jniThrowNullPointerException(env, NULL); 660 return false; 661 } 662 663 if (env->IsInstanceOf(javaSocketAddress, JniConstants::netlinkSocketAddressClass)) { 664 return javaNetlinkSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len); 665 } else if (env->IsInstanceOf(javaSocketAddress, JniConstants::inetSocketAddressClass)) { 666 return javaInetSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len); 667 } else if (env->IsInstanceOf(javaSocketAddress, JniConstants::packetSocketAddressClass)) { 668 return javaPacketSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len); 669 } else if (env->IsInstanceOf(javaSocketAddress, JniConstants::unixSocketAddressClass)) { 670 return javaUnixSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len); 671 } 672 jniThrowException(env, "java/lang/UnsupportedOperationException", 673 "unsupported SocketAddress subclass"); 674 return false; 675} 676 677static jobject doStat(JNIEnv* env, jstring javaPath, bool isLstat) { 678 ScopedUtfChars path(env, javaPath); 679 if (path.c_str() == NULL) { 680 return NULL; 681 } 682 struct stat64 sb; 683 int rc = isLstat ? TEMP_FAILURE_RETRY(lstat64(path.c_str(), &sb)) 684 : TEMP_FAILURE_RETRY(stat64(path.c_str(), &sb)); 685 if (rc == -1) { 686 throwErrnoException(env, isLstat ? "lstat" : "stat"); 687 return NULL; 688 } 689 return makeStructStat(env, sb); 690} 691 692static jobject doGetSockName(JNIEnv* env, jobject javaFd, bool is_sockname) { 693 int fd = jniGetFDFromFileDescriptor(env, javaFd); 694 sockaddr_storage ss; 695 sockaddr* sa = reinterpret_cast<sockaddr*>(&ss); 696 socklen_t byteCount = sizeof(ss); 697 memset(&ss, 0, byteCount); 698 int rc = is_sockname ? TEMP_FAILURE_RETRY(getsockname(fd, sa, &byteCount)) 699 : TEMP_FAILURE_RETRY(getpeername(fd, sa, &byteCount)); 700 if (rc == -1) { 701 throwErrnoException(env, is_sockname ? "getsockname" : "getpeername"); 702 return NULL; 703 } 704 return makeSocketAddress(env, ss, byteCount); 705} 706 707class Passwd { 708public: 709 explicit Passwd(JNIEnv* env) : mEnv(env), mResult(NULL) { 710 mBufferSize = sysconf(_SC_GETPW_R_SIZE_MAX); 711 mBuffer.reset(new char[mBufferSize]); 712 } 713 714 jobject getpwnam(const char* name) { 715 return process("getpwnam_r", getpwnam_r(name, &mPwd, mBuffer.get(), mBufferSize, &mResult)); 716 } 717 718 jobject getpwuid(uid_t uid) { 719 return process("getpwuid_r", getpwuid_r(uid, &mPwd, mBuffer.get(), mBufferSize, &mResult)); 720 } 721 722 struct passwd* get() { 723 return mResult; 724 } 725 726private: 727 jobject process(const char* syscall, int error) { 728 if (mResult == NULL) { 729 errno = error; 730 throwErrnoException(mEnv, syscall); 731 return NULL; 732 } 733 return makeStructPasswd(mEnv, *mResult); 734 } 735 736 JNIEnv* mEnv; 737 std::unique_ptr<char[]> mBuffer; 738 size_t mBufferSize; 739 struct passwd mPwd; 740 struct passwd* mResult; 741}; 742 743static void AssertException(JNIEnv* env) { 744 if (env->ExceptionCheck() == JNI_FALSE) { 745 env->FatalError("Expected exception"); 746 } 747} 748 749// Note for capabilities functions: 750// We assume the calls are rare enough that it does not make sense to cache class objects. The 751// advantage is lower maintenance burden. 752 753static bool ReadStructCapUserHeader( 754 JNIEnv* env, jobject java_header, __user_cap_header_struct* c_header) { 755 if (java_header == nullptr) { 756 jniThrowNullPointerException(env, "header is null"); 757 return false; 758 } 759 760 ScopedLocalRef<jclass> header_class(env, env->FindClass("android/system/StructCapUserHeader")); 761 if (header_class.get() == nullptr) { 762 return false; 763 } 764 765 { 766 static jfieldID version_fid = env->GetFieldID(header_class.get(), "version", "I"); 767 if (version_fid == nullptr) { 768 return false; 769 } 770 c_header->version = env->GetIntField(java_header, version_fid); 771 } 772 773 { 774 static jfieldID pid_fid = env->GetFieldID(header_class.get(), "pid", "I"); 775 if (pid_fid == nullptr) { 776 return false; 777 } 778 c_header->pid = env->GetIntField(java_header, pid_fid); 779 } 780 781 return true; 782} 783 784static void SetStructCapUserHeaderVersion( 785 JNIEnv* env, jobject java_header, __user_cap_header_struct* c_header) { 786 ScopedLocalRef<jclass> header_class(env, env->FindClass("android/system/StructCapUserHeader")); 787 if (header_class.get() == nullptr) { 788 env->ExceptionClear(); 789 return; 790 } 791 792 static jfieldID version_fid = env->GetFieldID(header_class.get(), "version", "I"); 793 if (version_fid == nullptr) { 794 env->ExceptionClear(); 795 return; 796 } 797 env->SetIntField(java_header, version_fid, c_header->version); 798} 799 800static jobject CreateStructCapUserData( 801 JNIEnv* env, jclass data_class, __user_cap_data_struct* c_data) { 802 if (c_data == nullptr) { 803 // Should not happen. 804 jniThrowNullPointerException(env, "data is null"); 805 return nullptr; 806 } 807 808 static jmethodID data_cons = env->GetMethodID(data_class, "<init>", "(III)V"); 809 if (data_cons == nullptr) { 810 return nullptr; 811 } 812 813 jint e = static_cast<jint>(c_data->effective); 814 jint p = static_cast<jint>(c_data->permitted); 815 jint i = static_cast<jint>(c_data->inheritable); 816 return env->NewObject(data_class, data_cons, e, p, i); 817} 818 819static bool ReadStructCapUserData(JNIEnv* env, jobject java_data, __user_cap_data_struct* c_data) { 820 if (java_data == nullptr) { 821 jniThrowNullPointerException(env, "data is null"); 822 return false; 823 } 824 825 ScopedLocalRef<jclass> data_class(env, env->FindClass("android/system/StructCapUserData")); 826 if (data_class.get() == nullptr) { 827 return false; 828 } 829 830 { 831 static jfieldID effective_fid = env->GetFieldID(data_class.get(), "effective", "I"); 832 if (effective_fid == nullptr) { 833 return false; 834 } 835 c_data->effective = env->GetIntField(java_data, effective_fid); 836 } 837 838 { 839 static jfieldID permitted_fid = env->GetFieldID(data_class.get(), "permitted", "I"); 840 if (permitted_fid == nullptr) { 841 return false; 842 } 843 c_data->permitted = env->GetIntField(java_data, permitted_fid); 844 } 845 846 847 { 848 static jfieldID inheritable_fid = env->GetFieldID(data_class.get(), "inheritable", "I"); 849 if (inheritable_fid == nullptr) { 850 return false; 851 } 852 c_data->inheritable = env->GetIntField(java_data, inheritable_fid); 853 } 854 855 return true; 856} 857 858static constexpr size_t kMaxCapUserDataLength = 2U; 859#ifdef _LINUX_CAPABILITY_VERSION_1 860static_assert(kMaxCapUserDataLength >= _LINUX_CAPABILITY_U32S_1, "Length too small."); 861#endif 862#ifdef _LINUX_CAPABILITY_VERSION_2 863static_assert(kMaxCapUserDataLength >= _LINUX_CAPABILITY_U32S_2, "Length too small."); 864#endif 865#ifdef _LINUX_CAPABILITY_VERSION_3 866static_assert(kMaxCapUserDataLength >= _LINUX_CAPABILITY_U32S_3, "Length too small."); 867#endif 868#ifdef _LINUX_CAPABILITY_VERSION_4 869static_assert(false, "Unsupported capability version, please update."); 870#endif 871 872static size_t GetCapUserDataLength(uint32_t version) { 873#ifdef _LINUX_CAPABILITY_VERSION_1 874 if (version == _LINUX_CAPABILITY_VERSION_1) { 875 return _LINUX_CAPABILITY_U32S_1; 876 } 877#endif 878#ifdef _LINUX_CAPABILITY_VERSION_2 879 if (version == _LINUX_CAPABILITY_VERSION_2) { 880 return _LINUX_CAPABILITY_U32S_2; 881 } 882#endif 883#ifdef _LINUX_CAPABILITY_VERSION_3 884 if (version == _LINUX_CAPABILITY_VERSION_3) { 885 return _LINUX_CAPABILITY_U32S_3; 886 } 887#endif 888 return 0; 889} 890 891static jobject Linux_accept(JNIEnv* env, jobject, jobject javaFd, jobject javaSocketAddress) { 892 sockaddr_storage ss; 893 socklen_t sl = sizeof(ss); 894 memset(&ss, 0, sizeof(ss)); 895 sockaddr* peer = (javaSocketAddress != NULL) ? reinterpret_cast<sockaddr*>(&ss) : NULL; 896 socklen_t* peerLength = (javaSocketAddress != NULL) ? &sl : 0; 897 jint clientFd = NET_FAILURE_RETRY(env, int, accept, javaFd, peer, peerLength); 898 if (clientFd == -1 || !fillSocketAddress(env, javaSocketAddress, ss, *peerLength)) { 899 close(clientFd); 900 return NULL; 901 } 902 return (clientFd != -1) ? jniCreateFileDescriptor(env, clientFd) : NULL; 903} 904 905static jboolean Linux_access(JNIEnv* env, jobject, jstring javaPath, jint mode) { 906 ScopedUtfChars path(env, javaPath); 907 if (path.c_str() == NULL) { 908 return JNI_FALSE; 909 } 910 int rc = TEMP_FAILURE_RETRY(access(path.c_str(), mode)); 911 if (rc == -1) { 912 throwErrnoException(env, "access"); 913 } 914 return (rc == 0); 915} 916 917static void Linux_bind(JNIEnv* env, jobject, jobject javaFd, jobject javaAddress, jint port) { 918 // We don't need the return value because we'll already have thrown. 919 (void) NET_IPV4_FALLBACK(env, int, bind, javaFd, javaAddress, port, NULL_ADDR_FORBIDDEN); 920} 921 922static void Linux_bindSocketAddress( 923 JNIEnv* env, jobject, jobject javaFd, jobject javaSocketAddress) { 924 sockaddr_storage ss; 925 socklen_t sa_len; 926 if (!javaSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len)) { 927 return; // Exception already thrown. 928 } 929 930 const sockaddr* sa = reinterpret_cast<const sockaddr*>(&ss); 931 // We don't need the return value because we'll already have thrown. 932 (void) NET_FAILURE_RETRY(env, int, bind, javaFd, sa, sa_len); 933} 934 935static jobjectArray Linux_capget(JNIEnv* env, jobject, jobject header) { 936 // Convert Java header struct to kernel datastructure. 937 __user_cap_header_struct cap_header; 938 if (!ReadStructCapUserHeader(env, header, &cap_header)) { 939 AssertException(env); 940 return nullptr; 941 } 942 943 // Call capget. 944 __user_cap_data_struct cap_data[kMaxCapUserDataLength]; 945 if (capget(&cap_header, &cap_data[0]) == -1) { 946 // Check for EINVAL. In that case, mutate the header. 947 if (errno == EINVAL) { 948 int saved_errno = errno; 949 SetStructCapUserHeaderVersion(env, header, &cap_header); 950 errno = saved_errno; 951 } 952 throwErrnoException(env, "capget"); 953 return nullptr; 954 } 955 956 // Create the result array. 957 ScopedLocalRef<jclass> data_class(env, env->FindClass("android/system/StructCapUserData")); 958 if (data_class.get() == nullptr) { 959 return nullptr; 960 } 961 size_t result_size = GetCapUserDataLength(cap_header.version); 962 ScopedLocalRef<jobjectArray> result( 963 env, env->NewObjectArray(result_size, data_class.get(), nullptr)); 964 if (result.get() == nullptr) { 965 return nullptr; 966 } 967 // Translate the values we got. 968 for (size_t i = 0; i < result_size; ++i) { 969 ScopedLocalRef<jobject> value( 970 env, CreateStructCapUserData(env, data_class.get(), &cap_data[i])); 971 if (value.get() == nullptr) { 972 AssertException(env); 973 return nullptr; 974 } 975 env->SetObjectArrayElement(result.get(), i, value.get()); 976 } 977 return result.release(); 978} 979 980static void Linux_capset( 981 JNIEnv* env, jobject, jobject header, jobjectArray data) { 982 // Convert Java header struct to kernel datastructure. 983 __user_cap_header_struct cap_header; 984 if (!ReadStructCapUserHeader(env, header, &cap_header)) { 985 AssertException(env); 986 return; 987 } 988 size_t result_size = GetCapUserDataLength(cap_header.version); 989 // Ensure that the array has the expected length. 990 if (env->GetArrayLength(data) != static_cast<jint>(result_size)) { 991 jniThrowExceptionFmt(env, 992 "java/lang/IllegalArgumentException", 993 "Unsupported input length %d (expected %zu)", 994 env->GetArrayLength(data), 995 result_size); 996 return; 997 } 998 999 __user_cap_data_struct cap_data[kMaxCapUserDataLength]; 1000 // Translate the values we got. 1001 for (size_t i = 0; i < result_size; ++i) { 1002 ScopedLocalRef<jobject> value(env, env->GetObjectArrayElement(data, i)); 1003 if (!ReadStructCapUserData(env, value.get(), &cap_data[i])) { 1004 AssertException(env); 1005 return; 1006 } 1007 } 1008 1009 throwIfMinusOne(env, "capset", capset(&cap_header, &cap_data[0])); 1010} 1011 1012static void Linux_chmod(JNIEnv* env, jobject, jstring javaPath, jint mode) { 1013 ScopedUtfChars path(env, javaPath); 1014 if (path.c_str() == NULL) { 1015 return; 1016 } 1017 throwIfMinusOne(env, "chmod", TEMP_FAILURE_RETRY(chmod(path.c_str(), mode))); 1018} 1019 1020static void Linux_chown(JNIEnv* env, jobject, jstring javaPath, jint uid, jint gid) { 1021 ScopedUtfChars path(env, javaPath); 1022 if (path.c_str() == NULL) { 1023 return; 1024 } 1025 throwIfMinusOne(env, "chown", TEMP_FAILURE_RETRY(chown(path.c_str(), uid, gid))); 1026} 1027 1028static void Linux_close(JNIEnv* env, jobject, jobject javaFd) { 1029 // Get the FileDescriptor's 'fd' field and clear it. 1030 // We need to do this before we can throw an IOException (http://b/3222087). 1031 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1032 jniSetFileDescriptorOfFD(env, javaFd, -1); 1033 1034 // Even if close(2) fails with EINTR, the fd will have been closed. 1035 // Using TEMP_FAILURE_RETRY will either lead to EBADF or closing someone else's fd. 1036 // http://lkml.indiana.edu/hypermail/linux/kernel/0509.1/0877.html 1037 throwIfMinusOne(env, "close", close(fd)); 1038} 1039 1040static void Linux_connect(JNIEnv* env, jobject, jobject javaFd, jobject javaAddress, jint port) { 1041 (void) NET_IPV4_FALLBACK(env, int, connect, javaFd, javaAddress, port, NULL_ADDR_FORBIDDEN); 1042} 1043 1044static void Linux_connectSocketAddress( 1045 JNIEnv* env, jobject, jobject javaFd, jobject javaSocketAddress) { 1046 sockaddr_storage ss; 1047 socklen_t sa_len; 1048 if (!javaSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len)) { 1049 return; // Exception already thrown. 1050 } 1051 1052 const sockaddr* sa = reinterpret_cast<const sockaddr*>(&ss); 1053 // We don't need the return value because we'll already have thrown. 1054 (void) NET_FAILURE_RETRY(env, int, connect, javaFd, sa, sa_len); 1055} 1056 1057static jobject Linux_dup(JNIEnv* env, jobject, jobject javaOldFd) { 1058 int oldFd = jniGetFDFromFileDescriptor(env, javaOldFd); 1059 int newFd = throwIfMinusOne(env, "dup", TEMP_FAILURE_RETRY(dup(oldFd))); 1060 return (newFd != -1) ? jniCreateFileDescriptor(env, newFd) : NULL; 1061} 1062 1063static jobject Linux_dup2(JNIEnv* env, jobject, jobject javaOldFd, jint newFd) { 1064 int oldFd = jniGetFDFromFileDescriptor(env, javaOldFd); 1065 int fd = throwIfMinusOne(env, "dup2", TEMP_FAILURE_RETRY(dup2(oldFd, newFd))); 1066 return (fd != -1) ? jniCreateFileDescriptor(env, fd) : NULL; 1067} 1068 1069static jobjectArray Linux_environ(JNIEnv* env, jobject) { 1070 extern char** environ; // Standard, but not in any header file. 1071 return toStringArray(env, environ); 1072} 1073 1074static void Linux_execve(JNIEnv* env, jobject, jstring javaFilename, jobjectArray javaArgv, jobjectArray javaEnvp) { 1075 ScopedUtfChars path(env, javaFilename); 1076 if (path.c_str() == NULL) { 1077 return; 1078 } 1079 1080 ExecStrings argv(env, javaArgv); 1081 ExecStrings envp(env, javaEnvp); 1082 TEMP_FAILURE_RETRY(execve(path.c_str(), argv.get(), envp.get())); 1083 1084 throwErrnoException(env, "execve"); 1085} 1086 1087static void Linux_execv(JNIEnv* env, jobject, jstring javaFilename, jobjectArray javaArgv) { 1088 ScopedUtfChars path(env, javaFilename); 1089 if (path.c_str() == NULL) { 1090 return; 1091 } 1092 1093 ExecStrings argv(env, javaArgv); 1094 TEMP_FAILURE_RETRY(execv(path.c_str(), argv.get())); 1095 1096 throwErrnoException(env, "execv"); 1097} 1098 1099static void Linux_fchmod(JNIEnv* env, jobject, jobject javaFd, jint mode) { 1100 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1101 throwIfMinusOne(env, "fchmod", TEMP_FAILURE_RETRY(fchmod(fd, mode))); 1102} 1103 1104static void Linux_fchown(JNIEnv* env, jobject, jobject javaFd, jint uid, jint gid) { 1105 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1106 throwIfMinusOne(env, "fchown", TEMP_FAILURE_RETRY(fchown(fd, uid, gid))); 1107} 1108 1109static jint Linux_fcntlFlock(JNIEnv* env, jobject, jobject javaFd, jint cmd, jobject javaFlock) { 1110 static jfieldID typeFid = env->GetFieldID(JniConstants::structFlockClass, "l_type", "S"); 1111 static jfieldID whenceFid = env->GetFieldID(JniConstants::structFlockClass, "l_whence", "S"); 1112 static jfieldID startFid = env->GetFieldID(JniConstants::structFlockClass, "l_start", "J"); 1113 static jfieldID lenFid = env->GetFieldID(JniConstants::structFlockClass, "l_len", "J"); 1114 static jfieldID pidFid = env->GetFieldID(JniConstants::structFlockClass, "l_pid", "I"); 1115 1116 struct flock64 lock; 1117 memset(&lock, 0, sizeof(lock)); 1118 lock.l_type = env->GetShortField(javaFlock, typeFid); 1119 lock.l_whence = env->GetShortField(javaFlock, whenceFid); 1120 lock.l_start = env->GetLongField(javaFlock, startFid); 1121 lock.l_len = env->GetLongField(javaFlock, lenFid); 1122 lock.l_pid = env->GetIntField(javaFlock, pidFid); 1123 1124 int rc = IO_FAILURE_RETRY(env, int, fcntl, javaFd, cmd, &lock); 1125 if (rc != -1) { 1126 env->SetShortField(javaFlock, typeFid, lock.l_type); 1127 env->SetShortField(javaFlock, whenceFid, lock.l_whence); 1128 env->SetLongField(javaFlock, startFid, lock.l_start); 1129 env->SetLongField(javaFlock, lenFid, lock.l_len); 1130 env->SetIntField(javaFlock, pidFid, lock.l_pid); 1131 } 1132 return rc; 1133} 1134 1135static jint Linux_fcntlInt(JNIEnv* env, jobject, jobject javaFd, jint cmd, jint arg) { 1136 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1137 return throwIfMinusOne(env, "fcntl", TEMP_FAILURE_RETRY(fcntl(fd, cmd, arg))); 1138} 1139 1140static jint Linux_fcntlVoid(JNIEnv* env, jobject, jobject javaFd, jint cmd) { 1141 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1142 return throwIfMinusOne(env, "fcntl", TEMP_FAILURE_RETRY(fcntl(fd, cmd))); 1143} 1144 1145static void Linux_fdatasync(JNIEnv* env, jobject, jobject javaFd) { 1146 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1147 throwIfMinusOne(env, "fdatasync", TEMP_FAILURE_RETRY(fdatasync(fd))); 1148} 1149 1150static jobject Linux_fstat(JNIEnv* env, jobject, jobject javaFd) { 1151 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1152 struct stat64 sb; 1153 int rc = TEMP_FAILURE_RETRY(fstat64(fd, &sb)); 1154 if (rc == -1) { 1155 throwErrnoException(env, "fstat"); 1156 return NULL; 1157 } 1158 return makeStructStat(env, sb); 1159} 1160 1161static jobject Linux_fstatvfs(JNIEnv* env, jobject, jobject javaFd) { 1162 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1163 struct statvfs sb; 1164 int rc = TEMP_FAILURE_RETRY(fstatvfs(fd, &sb)); 1165 if (rc == -1) { 1166 throwErrnoException(env, "fstatvfs"); 1167 return NULL; 1168 } 1169 return makeStructStatVfs(env, sb); 1170} 1171 1172static void Linux_fsync(JNIEnv* env, jobject, jobject javaFd) { 1173 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1174 throwIfMinusOne(env, "fsync", TEMP_FAILURE_RETRY(fsync(fd))); 1175} 1176 1177static void Linux_ftruncate(JNIEnv* env, jobject, jobject javaFd, jlong length) { 1178 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1179 throwIfMinusOne(env, "ftruncate", TEMP_FAILURE_RETRY(ftruncate64(fd, length))); 1180} 1181 1182static jstring Linux_gai_strerror(JNIEnv* env, jobject, jint error) { 1183 return env->NewStringUTF(gai_strerror(error)); 1184} 1185 1186static jobjectArray Linux_android_getaddrinfo(JNIEnv* env, jobject, jstring javaNode, 1187 jobject javaHints, jint netId) { 1188 ScopedUtfChars node(env, javaNode); 1189 if (node.c_str() == NULL) { 1190 return NULL; 1191 } 1192 1193 static jfieldID flagsFid = env->GetFieldID(JniConstants::structAddrinfoClass, "ai_flags", "I"); 1194 static jfieldID familyFid = env->GetFieldID(JniConstants::structAddrinfoClass, "ai_family", "I"); 1195 static jfieldID socktypeFid = env->GetFieldID(JniConstants::structAddrinfoClass, "ai_socktype", "I"); 1196 static jfieldID protocolFid = env->GetFieldID(JniConstants::structAddrinfoClass, "ai_protocol", "I"); 1197 1198 addrinfo hints; 1199 memset(&hints, 0, sizeof(hints)); 1200 hints.ai_flags = env->GetIntField(javaHints, flagsFid); 1201 hints.ai_family = env->GetIntField(javaHints, familyFid); 1202 hints.ai_socktype = env->GetIntField(javaHints, socktypeFid); 1203 hints.ai_protocol = env->GetIntField(javaHints, protocolFid); 1204 1205 addrinfo* addressList = NULL; 1206 errno = 0; 1207 int rc = android_getaddrinfofornet(node.c_str(), NULL, &hints, netId, 0, &addressList); 1208 std::unique_ptr<addrinfo, addrinfo_deleter> addressListDeleter(addressList); 1209 if (rc != 0) { 1210 throwGaiException(env, "android_getaddrinfo", rc); 1211 return NULL; 1212 } 1213 1214 // Count results so we know how to size the output array. 1215 int addressCount = 0; 1216 for (addrinfo* ai = addressList; ai != NULL; ai = ai->ai_next) { 1217 if (ai->ai_family == AF_INET || ai->ai_family == AF_INET6) { 1218 ++addressCount; 1219 } else { 1220 ALOGE("android_getaddrinfo unexpected ai_family %i", ai->ai_family); 1221 } 1222 } 1223 if (addressCount == 0) { 1224 return NULL; 1225 } 1226 1227 // Prepare output array. 1228 jobjectArray result = env->NewObjectArray(addressCount, JniConstants::inetAddressClass, NULL); 1229 if (result == NULL) { 1230 return NULL; 1231 } 1232 1233 // Examine returned addresses one by one, save them in the output array. 1234 int index = 0; 1235 for (addrinfo* ai = addressList; ai != NULL; ai = ai->ai_next) { 1236 if (ai->ai_family != AF_INET && ai->ai_family != AF_INET6) { 1237 // Unknown address family. Skip this address. 1238 ALOGE("android_getaddrinfo unexpected ai_family %i", ai->ai_family); 1239 continue; 1240 } 1241 1242 // Convert each IP address into a Java byte array. 1243 sockaddr_storage& address = *reinterpret_cast<sockaddr_storage*>(ai->ai_addr); 1244 ScopedLocalRef<jobject> inetAddress(env, sockaddrToInetAddress(env, address, NULL)); 1245 if (inetAddress.get() == NULL) { 1246 return NULL; 1247 } 1248 env->SetObjectArrayElement(result, index, inetAddress.get()); 1249 ++index; 1250 } 1251 return result; 1252} 1253 1254static jint Linux_getegid(JNIEnv*, jobject) { 1255 return getegid(); 1256} 1257 1258static jint Linux_geteuid(JNIEnv*, jobject) { 1259 return geteuid(); 1260} 1261 1262static jint Linux_getgid(JNIEnv*, jobject) { 1263 return getgid(); 1264} 1265 1266static jstring Linux_getenv(JNIEnv* env, jobject, jstring javaName) { 1267 ScopedUtfChars name(env, javaName); 1268 if (name.c_str() == NULL) { 1269 return NULL; 1270 } 1271 return env->NewStringUTF(getenv(name.c_str())); 1272} 1273 1274static jstring Linux_getnameinfo(JNIEnv* env, jobject, jobject javaAddress, jint flags) { 1275 sockaddr_storage ss; 1276 socklen_t sa_len; 1277 if (!inetAddressToSockaddrVerbatim(env, javaAddress, 0, ss, sa_len)) { 1278 return NULL; 1279 } 1280 char buf[NI_MAXHOST]; // NI_MAXHOST is longer than INET6_ADDRSTRLEN. 1281 errno = 0; 1282 int rc = getnameinfo(reinterpret_cast<sockaddr*>(&ss), sa_len, buf, sizeof(buf), NULL, 0, flags); 1283 if (rc != 0) { 1284 throwGaiException(env, "getnameinfo", rc); 1285 return NULL; 1286 } 1287 return env->NewStringUTF(buf); 1288} 1289 1290static jobject Linux_getpeername(JNIEnv* env, jobject, jobject javaFd) { 1291 return doGetSockName(env, javaFd, false); 1292} 1293 1294static jint Linux_getpgid(JNIEnv* env, jobject, jint pid) { 1295 return throwIfMinusOne(env, "getpgid", TEMP_FAILURE_RETRY(getpgid(pid))); 1296} 1297 1298static jint Linux_getpid(JNIEnv*, jobject) { 1299 return TEMP_FAILURE_RETRY(getpid()); 1300} 1301 1302static jint Linux_getppid(JNIEnv*, jobject) { 1303 return TEMP_FAILURE_RETRY(getppid()); 1304} 1305 1306static jobject Linux_getpwnam(JNIEnv* env, jobject, jstring javaName) { 1307 ScopedUtfChars name(env, javaName); 1308 if (name.c_str() == NULL) { 1309 return NULL; 1310 } 1311 return Passwd(env).getpwnam(name.c_str()); 1312} 1313 1314static jobject Linux_getpwuid(JNIEnv* env, jobject, jint uid) { 1315 return Passwd(env).getpwuid(uid); 1316} 1317 1318static jobject Linux_getsockname(JNIEnv* env, jobject, jobject javaFd) { 1319 return doGetSockName(env, javaFd, true); 1320} 1321 1322static jint Linux_getsockoptByte(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 1323 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1324 u_char result = 0; 1325 socklen_t size = sizeof(result); 1326 throwIfMinusOne(env, "getsockopt", TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &result, &size))); 1327 return result; 1328} 1329 1330static jobject Linux_getsockoptInAddr(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 1331 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1332 sockaddr_storage ss; 1333 memset(&ss, 0, sizeof(ss)); 1334 ss.ss_family = AF_INET; // This is only for the IPv4-only IP_MULTICAST_IF. 1335 sockaddr_in* sa = reinterpret_cast<sockaddr_in*>(&ss); 1336 socklen_t size = sizeof(sa->sin_addr); 1337 int rc = TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &sa->sin_addr, &size)); 1338 if (rc == -1) { 1339 throwErrnoException(env, "getsockopt"); 1340 return NULL; 1341 } 1342 return sockaddrToInetAddress(env, ss, NULL); 1343} 1344 1345static jint Linux_getsockoptInt(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 1346 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1347 jint result = 0; 1348 socklen_t size = sizeof(result); 1349 throwIfMinusOne(env, "getsockopt", TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &result, &size))); 1350 return result; 1351} 1352 1353static jobject Linux_getsockoptLinger(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 1354 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1355 struct linger l; 1356 socklen_t size = sizeof(l); 1357 memset(&l, 0, size); 1358 int rc = TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &l, &size)); 1359 if (rc == -1) { 1360 throwErrnoException(env, "getsockopt"); 1361 return NULL; 1362 } 1363 return makeStructLinger(env, l); 1364} 1365 1366static jobject Linux_getsockoptTimeval(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 1367 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1368 struct timeval tv; 1369 socklen_t size = sizeof(tv); 1370 memset(&tv, 0, size); 1371 int rc = TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &tv, &size)); 1372 if (rc == -1) { 1373 throwErrnoException(env, "getsockopt"); 1374 return NULL; 1375 } 1376 return makeStructTimeval(env, tv); 1377} 1378 1379static jobject Linux_getsockoptUcred(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 1380 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1381 struct ucred u; 1382 socklen_t size = sizeof(u); 1383 memset(&u, 0, size); 1384 int rc = TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &u, &size)); 1385 if (rc == -1) { 1386 throwErrnoException(env, "getsockopt"); 1387 return NULL; 1388 } 1389 return makeStructUcred(env, u); 1390} 1391 1392static jint Linux_gettid(JNIEnv* env __unused, jobject) { 1393#if defined(__BIONIC__) 1394 return TEMP_FAILURE_RETRY(gettid()); 1395#else 1396 return syscall(__NR_gettid); 1397#endif 1398} 1399 1400static jint Linux_getuid(JNIEnv*, jobject) { 1401 return getuid(); 1402} 1403 1404static jbyteArray Linux_getxattr(JNIEnv* env, jobject, jstring javaPath, 1405 jstring javaName) { 1406 ScopedUtfChars path(env, javaPath); 1407 if (path.c_str() == NULL) { 1408 return NULL; 1409 } 1410 ScopedUtfChars name(env, javaName); 1411 if (name.c_str() == NULL) { 1412 return NULL; 1413 } 1414 1415 while (true) { 1416 // Get the current size of the named extended attribute. 1417 ssize_t valueLength; 1418 if ((valueLength = getxattr(path.c_str(), name.c_str(), NULL, 0)) < 0) { 1419 throwErrnoException(env, "getxattr"); 1420 return NULL; 1421 } 1422 1423 // Create the actual byte array. 1424 std::vector<char> buf(valueLength); 1425 if ((valueLength = getxattr(path.c_str(), name.c_str(), buf.data(), valueLength)) < 0) { 1426 if (errno == ERANGE) { 1427 // The attribute value has changed since last getxattr call and buf no longer fits, 1428 // try again. 1429 continue; 1430 } 1431 throwErrnoException(env, "getxattr"); 1432 return NULL; 1433 } 1434 jbyteArray array = env->NewByteArray(valueLength); 1435 if (array == NULL) { 1436 return NULL; 1437 } 1438 env->SetByteArrayRegion(array, 0, valueLength, reinterpret_cast<const jbyte*>(buf.data())); 1439 return array; 1440 } 1441} 1442 1443static jobjectArray Linux_getifaddrs(JNIEnv* env, jobject) { 1444 static jmethodID ctor = env->GetMethodID(JniConstants::structIfaddrs, "<init>", 1445 "(Ljava/lang/String;ILjava/net/InetAddress;Ljava/net/InetAddress;Ljava/net/InetAddress;[B)V"); 1446 1447 ifaddrs* ifaddr; 1448 int rc = TEMP_FAILURE_RETRY(getifaddrs(&ifaddr)); 1449 if (rc == -1) { 1450 throwErrnoException(env, "getifaddrs"); 1451 return NULL; 1452 } 1453 std::unique_ptr<ifaddrs, decltype(&freeifaddrs)> ifaddrPtr(ifaddr, freeifaddrs); 1454 1455 // Count results so we know how to size the output array. 1456 jint ifCount = 0; 1457 for (ifaddrs* ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) { 1458 ++ifCount; 1459 } 1460 1461 // Prepare output array. 1462 jobjectArray result = env->NewObjectArray(ifCount, JniConstants::structIfaddrs, NULL); 1463 if (result == NULL) { 1464 return NULL; 1465 } 1466 1467 // Traverse the list and populate the output array. 1468 int index = 0; 1469 for (ifaddrs* ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next, ++index) { 1470 TO_JAVA_STRING(name, ifa->ifa_name); 1471 jint flags = ifa->ifa_flags; 1472 sockaddr_storage* interfaceAddr = 1473 reinterpret_cast<sockaddr_storage*>(ifa->ifa_addr); 1474 sockaddr_storage* netmaskAddr = 1475 reinterpret_cast<sockaddr_storage*>(ifa->ifa_netmask); 1476 sockaddr_storage* broadAddr = 1477 reinterpret_cast<sockaddr_storage*>(ifa->ifa_broadaddr); 1478 1479 jobject addr, netmask, broad; 1480 jbyteArray hwaddr = NULL; 1481 if (interfaceAddr != NULL) { 1482 switch (interfaceAddr->ss_family) { 1483 case AF_INET: 1484 case AF_INET6: 1485 // IPv4 / IPv6. 1486 // interfaceAddr and netmaskAddr are never null. 1487 if ((addr = sockaddrToInetAddress(env, *interfaceAddr, NULL)) == NULL) { 1488 return NULL; 1489 } 1490 if ((netmask = sockaddrToInetAddress(env, *netmaskAddr, NULL)) == NULL) { 1491 return NULL; 1492 } 1493 if (broadAddr != NULL && (ifa->ifa_flags & IFF_BROADCAST)) { 1494 if ((broad = sockaddrToInetAddress(env, *broadAddr, NULL)) == NULL) { 1495 return NULL; 1496 } 1497 } else { 1498 broad = NULL; 1499 } 1500 break; 1501 case AF_PACKET: 1502 // Raw Interface. 1503 sockaddr_ll* sll = reinterpret_cast<sockaddr_ll*>(ifa->ifa_addr); 1504 1505 bool allZero = true; 1506 for (int i = 0; i < sll->sll_halen; ++i) { 1507 if (sll->sll_addr[i] != 0) { 1508 allZero = false; 1509 break; 1510 } 1511 } 1512 1513 if (!allZero) { 1514 hwaddr = env->NewByteArray(sll->sll_halen); 1515 if (hwaddr == NULL) { 1516 return NULL; 1517 } 1518 env->SetByteArrayRegion(hwaddr, 0, sll->sll_halen, 1519 reinterpret_cast<const jbyte*>(sll->sll_addr)); 1520 } 1521 addr = netmask = broad = NULL; 1522 break; 1523 } 1524 } else { 1525 // Preserve the entry even if the interface has no interface address. 1526 // http://b/29243557/ 1527 addr = netmask = broad = NULL; 1528 } 1529 1530 jobject o = env->NewObject(JniConstants::structIfaddrs, ctor, name, flags, addr, netmask, 1531 broad, hwaddr); 1532 env->SetObjectArrayElement(result, index, o); 1533 } 1534 1535 return result; 1536} 1537 1538static jstring Linux_if_indextoname(JNIEnv* env, jobject, jint index) { 1539 char buf[IF_NAMESIZE]; 1540 char* name = if_indextoname(index, buf); 1541 // if_indextoname(3) returns NULL on failure, which will come out of NewStringUTF unscathed. 1542 // There's no useful information in errno, so we don't bother throwing. Callers can null-check. 1543 return env->NewStringUTF(name); 1544} 1545 1546static jint Linux_if_nametoindex(JNIEnv* env, jobject, jstring name) { 1547 ScopedUtfChars cname(env, name); 1548 if (cname.c_str() == NULL) { 1549 return 0; 1550 } 1551 1552 // There's no useful information in errno, so we don't bother throwing. Callers can zero-check. 1553 return if_nametoindex(cname.c_str()); 1554} 1555 1556static jobject Linux_inet_pton(JNIEnv* env, jobject, jint family, jstring javaName) { 1557 ScopedUtfChars name(env, javaName); 1558 if (name.c_str() == NULL) { 1559 return NULL; 1560 } 1561 sockaddr_storage ss; 1562 memset(&ss, 0, sizeof(ss)); 1563 // sockaddr_in and sockaddr_in6 are at the same address, so we can use either here. 1564 void* dst = &reinterpret_cast<sockaddr_in*>(&ss)->sin_addr; 1565 if (inet_pton(family, name.c_str(), dst) != 1) { 1566 return NULL; 1567 } 1568 ss.ss_family = family; 1569 return sockaddrToInetAddress(env, ss, NULL); 1570} 1571 1572static jint Linux_ioctlFlags(JNIEnv* env, jobject, jobject javaFd, jstring javaInterfaceName) { 1573 struct ifreq req; 1574 if (!fillIfreq(env, javaInterfaceName, req)) { 1575 return 0; 1576 } 1577 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1578 throwIfMinusOne(env, "ioctl", TEMP_FAILURE_RETRY(ioctl(fd, SIOCGIFFLAGS, &req))); 1579 return req.ifr_flags; 1580} 1581 1582static jobject Linux_ioctlInetAddress(JNIEnv* env, jobject, jobject javaFd, jint cmd, jstring javaInterfaceName) { 1583 struct ifreq req; 1584 if (!fillIfreq(env, javaInterfaceName, req)) { 1585 return NULL; 1586 } 1587 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1588 int rc = throwIfMinusOne(env, "ioctl", TEMP_FAILURE_RETRY(ioctl(fd, cmd, &req))); 1589 if (rc == -1) { 1590 return NULL; 1591 } 1592 return sockaddrToInetAddress(env, reinterpret_cast<sockaddr_storage&>(req.ifr_addr), NULL); 1593} 1594 1595static jint Linux_ioctlInt(JNIEnv* env, jobject, jobject javaFd, jint cmd, jobject javaArg) { 1596 // This is complicated because ioctls may return their result by updating their argument 1597 // or via their return value, so we need to support both. 1598 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1599 static jfieldID valueFid = env->GetFieldID(JniConstants::mutableIntClass, "value", "I"); 1600 jint arg = env->GetIntField(javaArg, valueFid); 1601 int rc = throwIfMinusOne(env, "ioctl", TEMP_FAILURE_RETRY(ioctl(fd, cmd, &arg))); 1602 if (!env->ExceptionCheck()) { 1603 env->SetIntField(javaArg, valueFid, arg); 1604 } 1605 return rc; 1606} 1607 1608static jint Linux_ioctlMTU(JNIEnv* env, jobject, jobject javaFd, jstring javaInterfaceName) { 1609 struct ifreq req; 1610 if (!fillIfreq(env, javaInterfaceName, req)) { 1611 return 0; 1612 } 1613 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1614 throwIfMinusOne(env, "ioctl", TEMP_FAILURE_RETRY(ioctl(fd, SIOCGIFMTU, &req))); 1615 return req.ifr_mtu; 1616} 1617 1618static jboolean Linux_isatty(JNIEnv* env, jobject, jobject javaFd) { 1619 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1620 return TEMP_FAILURE_RETRY(isatty(fd)) == 1; 1621} 1622 1623static void Linux_kill(JNIEnv* env, jobject, jint pid, jint sig) { 1624 throwIfMinusOne(env, "kill", TEMP_FAILURE_RETRY(kill(pid, sig))); 1625} 1626 1627static void Linux_lchown(JNIEnv* env, jobject, jstring javaPath, jint uid, jint gid) { 1628 ScopedUtfChars path(env, javaPath); 1629 if (path.c_str() == NULL) { 1630 return; 1631 } 1632 throwIfMinusOne(env, "lchown", TEMP_FAILURE_RETRY(lchown(path.c_str(), uid, gid))); 1633} 1634 1635static void Linux_link(JNIEnv* env, jobject, jstring javaOldPath, jstring javaNewPath) { 1636 ScopedUtfChars oldPath(env, javaOldPath); 1637 if (oldPath.c_str() == NULL) { 1638 return; 1639 } 1640 ScopedUtfChars newPath(env, javaNewPath); 1641 if (newPath.c_str() == NULL) { 1642 return; 1643 } 1644 throwIfMinusOne(env, "link", TEMP_FAILURE_RETRY(link(oldPath.c_str(), newPath.c_str()))); 1645} 1646 1647static void Linux_listen(JNIEnv* env, jobject, jobject javaFd, jint backlog) { 1648 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1649 throwIfMinusOne(env, "listen", TEMP_FAILURE_RETRY(listen(fd, backlog))); 1650} 1651 1652static jobjectArray Linux_listxattr(JNIEnv* env, jobject, jstring javaPath) { 1653 ScopedUtfChars path(env, javaPath); 1654 if (path.c_str() == NULL) { 1655 return NULL; 1656 } 1657 1658 while (true) { 1659 // Get the current size of the named extended attribute. 1660 ssize_t valueLength; 1661 if ((valueLength = listxattr(path.c_str(), NULL, 0)) < 0) { 1662 throwErrnoException(env, "listxattr"); 1663 return NULL; 1664 } 1665 1666 // Create the actual byte array. 1667 std::string buf(valueLength, '\0'); 1668 if ((valueLength = listxattr(path.c_str(), &buf[0], valueLength)) < 0) { 1669 if (errno == ERANGE) { 1670 // The attribute value has changed since last listxattr call and buf no longer fits, 1671 // try again. 1672 continue; 1673 } 1674 throwErrnoException(env, "listxattr"); 1675 return NULL; 1676 } 1677 1678 // Split the output by '\0'. 1679 buf.resize(valueLength > 0 ? valueLength - 1 : 0); // Remove the trailing NULL character. 1680 std::string delim("\0", 1); 1681 auto xattrs = android::base::Split(buf, delim); 1682 1683 return toStringArray(env, xattrs); 1684 } 1685} 1686 1687static jlong Linux_lseek(JNIEnv* env, jobject, jobject javaFd, jlong offset, jint whence) { 1688 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1689 return throwIfMinusOne(env, "lseek", TEMP_FAILURE_RETRY(lseek64(fd, offset, whence))); 1690} 1691 1692static jobject Linux_lstat(JNIEnv* env, jobject, jstring javaPath) { 1693 return doStat(env, javaPath, true); 1694} 1695 1696static void Linux_mincore(JNIEnv* env, jobject, jlong address, jlong byteCount, jbyteArray javaVector) { 1697 ScopedByteArrayRW vector(env, javaVector); 1698 if (vector.get() == NULL) { 1699 return; 1700 } 1701 void* ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1702 unsigned char* vec = reinterpret_cast<unsigned char*>(vector.get()); 1703 throwIfMinusOne(env, "mincore", TEMP_FAILURE_RETRY(mincore(ptr, byteCount, vec))); 1704} 1705 1706static void Linux_mkdir(JNIEnv* env, jobject, jstring javaPath, jint mode) { 1707 ScopedUtfChars path(env, javaPath); 1708 if (path.c_str() == NULL) { 1709 return; 1710 } 1711 throwIfMinusOne(env, "mkdir", TEMP_FAILURE_RETRY(mkdir(path.c_str(), mode))); 1712} 1713 1714static void Linux_mkfifo(JNIEnv* env, jobject, jstring javaPath, jint mode) { 1715 ScopedUtfChars path(env, javaPath); 1716 if (path.c_str() == NULL) { 1717 return; 1718 } 1719 throwIfMinusOne(env, "mkfifo", TEMP_FAILURE_RETRY(mkfifo(path.c_str(), mode))); 1720} 1721 1722static void Linux_mlock(JNIEnv* env, jobject, jlong address, jlong byteCount) { 1723 void* ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1724 throwIfMinusOne(env, "mlock", TEMP_FAILURE_RETRY(mlock(ptr, byteCount))); 1725} 1726 1727static jlong Linux_mmap(JNIEnv* env, jobject, jlong address, jlong byteCount, jint prot, jint flags, jobject javaFd, jlong offset) { 1728 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1729 void* suggestedPtr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1730 void* ptr = mmap64(suggestedPtr, byteCount, prot, flags, fd, offset); 1731 if (ptr == MAP_FAILED) { 1732 throwErrnoException(env, "mmap"); 1733 } 1734 return static_cast<jlong>(reinterpret_cast<uintptr_t>(ptr)); 1735} 1736 1737static void Linux_msync(JNIEnv* env, jobject, jlong address, jlong byteCount, jint flags) { 1738 void* ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1739 throwIfMinusOne(env, "msync", TEMP_FAILURE_RETRY(msync(ptr, byteCount, flags))); 1740} 1741 1742static void Linux_munlock(JNIEnv* env, jobject, jlong address, jlong byteCount) { 1743 void* ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1744 throwIfMinusOne(env, "munlock", TEMP_FAILURE_RETRY(munlock(ptr, byteCount))); 1745} 1746 1747static void Linux_munmap(JNIEnv* env, jobject, jlong address, jlong byteCount) { 1748 void* ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1749 throwIfMinusOne(env, "munmap", TEMP_FAILURE_RETRY(munmap(ptr, byteCount))); 1750} 1751 1752static jobject Linux_open(JNIEnv* env, jobject, jstring javaPath, jint flags, jint mode) { 1753 ScopedUtfChars path(env, javaPath); 1754 if (path.c_str() == NULL) { 1755 return NULL; 1756 } 1757 int fd = throwIfMinusOne(env, "open", TEMP_FAILURE_RETRY(open(path.c_str(), flags, mode))); 1758 return fd != -1 ? jniCreateFileDescriptor(env, fd) : NULL; 1759} 1760 1761static jobjectArray Linux_pipe2(JNIEnv* env, jobject, jint flags __unused) { 1762 int fds[2]; 1763 throwIfMinusOne(env, "pipe2", TEMP_FAILURE_RETRY(pipe2(&fds[0], flags))); 1764 jobjectArray result = env->NewObjectArray(2, JniConstants::fileDescriptorClass, NULL); 1765 if (result == NULL) { 1766 return NULL; 1767 } 1768 for (int i = 0; i < 2; ++i) { 1769 ScopedLocalRef<jobject> fd(env, jniCreateFileDescriptor(env, fds[i])); 1770 if (fd.get() == NULL) { 1771 return NULL; 1772 } 1773 env->SetObjectArrayElement(result, i, fd.get()); 1774 if (env->ExceptionCheck()) { 1775 return NULL; 1776 } 1777 } 1778 return result; 1779} 1780 1781static jint Linux_poll(JNIEnv* env, jobject, jobjectArray javaStructs, jint timeoutMs) { 1782 static jfieldID fdFid = env->GetFieldID(JniConstants::structPollfdClass, "fd", "Ljava/io/FileDescriptor;"); 1783 static jfieldID eventsFid = env->GetFieldID(JniConstants::structPollfdClass, "events", "S"); 1784 static jfieldID reventsFid = env->GetFieldID(JniConstants::structPollfdClass, "revents", "S"); 1785 1786 // Turn the Java android.system.StructPollfd[] into a C++ struct pollfd[]. 1787 size_t arrayLength = env->GetArrayLength(javaStructs); 1788 std::unique_ptr<struct pollfd[]> fds(new struct pollfd[arrayLength]); 1789 memset(fds.get(), 0, sizeof(struct pollfd) * arrayLength); 1790 size_t count = 0; // Some trailing array elements may be irrelevant. (See below.) 1791 for (size_t i = 0; i < arrayLength; ++i) { 1792 ScopedLocalRef<jobject> javaStruct(env, env->GetObjectArrayElement(javaStructs, i)); 1793 if (javaStruct.get() == NULL) { 1794 break; // We allow trailing nulls in the array for caller convenience. 1795 } 1796 ScopedLocalRef<jobject> javaFd(env, env->GetObjectField(javaStruct.get(), fdFid)); 1797 if (javaFd.get() == NULL) { 1798 break; // We also allow callers to just clear the fd field (this is what Selector does). 1799 } 1800 fds[count].fd = jniGetFDFromFileDescriptor(env, javaFd.get()); 1801 fds[count].events = env->GetShortField(javaStruct.get(), eventsFid); 1802 ++count; 1803 } 1804 1805 std::vector<AsynchronousCloseMonitor*> monitors; 1806 for (size_t i = 0; i < count; ++i) { 1807 monitors.push_back(new AsynchronousCloseMonitor(fds[i].fd)); 1808 } 1809 1810 int rc; 1811 while (true) { 1812 timespec before; 1813 clock_gettime(CLOCK_MONOTONIC, &before); 1814 1815 rc = poll(fds.get(), count, timeoutMs); 1816 if (rc >= 0 || errno != EINTR) { 1817 break; 1818 } 1819 1820 // We got EINTR. Work out how much of the original timeout is still left. 1821 if (timeoutMs > 0) { 1822 timespec now; 1823 clock_gettime(CLOCK_MONOTONIC, &now); 1824 1825 timespec diff; 1826 diff.tv_sec = now.tv_sec - before.tv_sec; 1827 diff.tv_nsec = now.tv_nsec - before.tv_nsec; 1828 if (diff.tv_nsec < 0) { 1829 --diff.tv_sec; 1830 diff.tv_nsec += 1000000000; 1831 } 1832 1833 jint diffMs = diff.tv_sec * 1000 + diff.tv_nsec / 1000000; 1834 if (diffMs >= timeoutMs) { 1835 rc = 0; // We have less than 1ms left anyway, so just time out. 1836 break; 1837 } 1838 1839 timeoutMs -= diffMs; 1840 } 1841 } 1842 1843 for (size_t i = 0; i < monitors.size(); ++i) { 1844 delete monitors[i]; 1845 } 1846 if (rc == -1) { 1847 throwErrnoException(env, "poll"); 1848 return -1; 1849 } 1850 1851 // Update the revents fields in the Java android.system.StructPollfd[]. 1852 for (size_t i = 0; i < count; ++i) { 1853 ScopedLocalRef<jobject> javaStruct(env, env->GetObjectArrayElement(javaStructs, i)); 1854 if (javaStruct.get() == NULL) { 1855 return -1; 1856 } 1857 env->SetShortField(javaStruct.get(), reventsFid, fds[i].revents); 1858 } 1859 return rc; 1860} 1861 1862static void Linux_posix_fallocate(JNIEnv* env, jobject, jobject javaFd __unused, 1863 jlong offset __unused, jlong length __unused) { 1864 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1865 while ((errno = posix_fallocate64(fd, offset, length)) == EINTR) { 1866 } 1867 if (errno != 0) { 1868 throwErrnoException(env, "posix_fallocate"); 1869 } 1870} 1871 1872static jint Linux_prctl(JNIEnv* env, jobject, jint option __unused, jlong arg2 __unused, 1873 jlong arg3 __unused, jlong arg4 __unused, jlong arg5 __unused) { 1874 int result = TEMP_FAILURE_RETRY(prctl(static_cast<int>(option), 1875 static_cast<unsigned long>(arg2), 1876 static_cast<unsigned long>(arg3), 1877 static_cast<unsigned long>(arg4), 1878 static_cast<unsigned long>(arg5))); 1879 return throwIfMinusOne(env, "prctl", result); 1880} 1881 1882static jint Linux_preadBytes(JNIEnv* env, jobject, jobject javaFd, jobject javaBytes, jint byteOffset, jint byteCount, jlong offset) { 1883 ScopedBytesRW bytes(env, javaBytes); 1884 if (bytes.get() == NULL) { 1885 return -1; 1886 } 1887 return IO_FAILURE_RETRY(env, ssize_t, pread64, javaFd, bytes.get() + byteOffset, byteCount, offset); 1888} 1889 1890static jint Linux_pwriteBytes(JNIEnv* env, jobject, jobject javaFd, jbyteArray javaBytes, jint byteOffset, jint byteCount, jlong offset) { 1891 ScopedBytesRO bytes(env, javaBytes); 1892 if (bytes.get() == NULL) { 1893 return -1; 1894 } 1895 return IO_FAILURE_RETRY(env, ssize_t, pwrite64, javaFd, bytes.get() + byteOffset, byteCount, offset); 1896} 1897 1898static jint Linux_readBytes(JNIEnv* env, jobject, jobject javaFd, jobject javaBytes, jint byteOffset, jint byteCount) { 1899 ScopedBytesRW bytes(env, javaBytes); 1900 if (bytes.get() == NULL) { 1901 return -1; 1902 } 1903 return IO_FAILURE_RETRY(env, ssize_t, read, javaFd, bytes.get() + byteOffset, byteCount); 1904} 1905 1906static jstring Linux_readlink(JNIEnv* env, jobject, jstring javaPath) { 1907 ScopedUtfChars path(env, javaPath); 1908 if (path.c_str() == NULL) { 1909 return NULL; 1910 } 1911 1912 std::string result; 1913 if (!android::base::Readlink(path.c_str(), &result)) { 1914 throwErrnoException(env, "readlink"); 1915 return NULL; 1916 } 1917 return env->NewStringUTF(result.c_str()); 1918} 1919 1920static jstring Linux_realpath(JNIEnv* env, jobject, jstring javaPath) { 1921 ScopedUtfChars path(env, javaPath); 1922 if (path.c_str() == NULL) { 1923 return NULL; 1924 } 1925 1926 std::unique_ptr<char, c_deleter> real_path(realpath(path.c_str(), nullptr)); 1927 if (real_path.get() == nullptr) { 1928 throwErrnoException(env, "realpath"); 1929 return NULL; 1930 } 1931 1932 return env->NewStringUTF(real_path.get()); 1933} 1934 1935static jint Linux_readv(JNIEnv* env, jobject, jobject javaFd, jobjectArray buffers, jintArray offsets, jintArray byteCounts) { 1936 IoVec<ScopedBytesRW> ioVec(env, env->GetArrayLength(buffers)); 1937 if (!ioVec.init(buffers, offsets, byteCounts)) { 1938 return -1; 1939 } 1940 return IO_FAILURE_RETRY(env, ssize_t, readv, javaFd, ioVec.get(), ioVec.size()); 1941} 1942 1943static jint Linux_recvfromBytes(JNIEnv* env, jobject, jobject javaFd, jobject javaBytes, jint byteOffset, jint byteCount, jint flags, jobject javaInetSocketAddress) { 1944 ScopedBytesRW bytes(env, javaBytes); 1945 if (bytes.get() == NULL) { 1946 return -1; 1947 } 1948 sockaddr_storage ss; 1949 socklen_t sl = sizeof(ss); 1950 memset(&ss, 0, sizeof(ss)); 1951 sockaddr* from = (javaInetSocketAddress != NULL) ? reinterpret_cast<sockaddr*>(&ss) : NULL; 1952 socklen_t* fromLength = (javaInetSocketAddress != NULL) ? &sl : 0; 1953 jint recvCount = NET_FAILURE_RETRY(env, ssize_t, recvfrom, javaFd, bytes.get() + byteOffset, byteCount, flags, from, fromLength); 1954 if (recvCount >= 0) { 1955 // The socket may have performed orderly shutdown and recvCount would return 0 (see man 2 1956 // recvfrom), in which case ss.ss_family == AF_UNIX and fillInetSocketAddress would fail. 1957 // Don't fill in the address if recvfrom didn't succeed. http://b/33483694 1958 if (ss.ss_family == AF_INET || ss.ss_family == AF_INET6) { 1959 fillInetSocketAddress(env, javaInetSocketAddress, ss); 1960 } 1961 } 1962 return recvCount; 1963} 1964 1965static void Linux_remove(JNIEnv* env, jobject, jstring javaPath) { 1966 ScopedUtfChars path(env, javaPath); 1967 if (path.c_str() == NULL) { 1968 return; 1969 } 1970 throwIfMinusOne(env, "remove", TEMP_FAILURE_RETRY(remove(path.c_str()))); 1971} 1972 1973static void Linux_removexattr(JNIEnv* env, jobject, jstring javaPath, jstring javaName) { 1974 ScopedUtfChars path(env, javaPath); 1975 if (path.c_str() == NULL) { 1976 return; 1977 } 1978 ScopedUtfChars name(env, javaName); 1979 if (name.c_str() == NULL) { 1980 return; 1981 } 1982 1983 int res = removexattr(path.c_str(), name.c_str()); 1984 if (res < 0) { 1985 throwErrnoException(env, "removexattr"); 1986 } 1987} 1988 1989static void Linux_rename(JNIEnv* env, jobject, jstring javaOldPath, jstring javaNewPath) { 1990 ScopedUtfChars oldPath(env, javaOldPath); 1991 if (oldPath.c_str() == NULL) { 1992 return; 1993 } 1994 ScopedUtfChars newPath(env, javaNewPath); 1995 if (newPath.c_str() == NULL) { 1996 return; 1997 } 1998 throwIfMinusOne(env, "rename", TEMP_FAILURE_RETRY(rename(oldPath.c_str(), newPath.c_str()))); 1999} 2000 2001static jlong Linux_sendfile(JNIEnv* env, jobject, jobject javaOutFd, jobject javaInFd, jobject javaOffset, jlong byteCount) { 2002 int outFd = jniGetFDFromFileDescriptor(env, javaOutFd); 2003 int inFd = jniGetFDFromFileDescriptor(env, javaInFd); 2004 static jfieldID valueFid = env->GetFieldID(JniConstants::mutableLongClass, "value", "J"); 2005 off_t offset = 0; 2006 off_t* offsetPtr = NULL; 2007 if (javaOffset != NULL) { 2008 // TODO: fix bionic so we can have a 64-bit off_t! 2009 offset = env->GetLongField(javaOffset, valueFid); 2010 offsetPtr = &offset; 2011 } 2012 jlong result = throwIfMinusOne(env, "sendfile", TEMP_FAILURE_RETRY(sendfile(outFd, inFd, offsetPtr, byteCount))); 2013 if (javaOffset != NULL) { 2014 env->SetLongField(javaOffset, valueFid, offset); 2015 } 2016 return result; 2017} 2018 2019static jint Linux_sendtoBytes(JNIEnv* env, jobject, jobject javaFd, jobject javaBytes, jint byteOffset, jint byteCount, jint flags, jobject javaInetAddress, jint port) { 2020 ScopedBytesRO bytes(env, javaBytes); 2021 if (bytes.get() == NULL) { 2022 return -1; 2023 } 2024 2025 return NET_IPV4_FALLBACK(env, ssize_t, sendto, javaFd, javaInetAddress, port, 2026 NULL_ADDR_OK, bytes.get() + byteOffset, byteCount, flags); 2027} 2028 2029static jint Linux_sendtoBytesSocketAddress(JNIEnv* env, jobject, jobject javaFd, jobject javaBytes, jint byteOffset, jint byteCount, jint flags, jobject javaSocketAddress) { 2030 if (env->IsInstanceOf(javaSocketAddress, JniConstants::inetSocketAddressClass)) { 2031 // Use the InetAddress version so we get the benefit of NET_IPV4_FALLBACK. 2032 jobject javaInetAddress; 2033 jint port; 2034 javaInetSocketAddressToInetAddressAndPort(env, javaSocketAddress, javaInetAddress, port); 2035 return Linux_sendtoBytes(env, NULL, javaFd, javaBytes, byteOffset, byteCount, flags, 2036 javaInetAddress, port); 2037 } 2038 2039 ScopedBytesRO bytes(env, javaBytes); 2040 if (bytes.get() == NULL) { 2041 return -1; 2042 } 2043 2044 sockaddr_storage ss; 2045 socklen_t sa_len; 2046 if (!javaSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len)) { 2047 return -1; 2048 } 2049 2050 const sockaddr* sa = reinterpret_cast<const sockaddr*>(&ss); 2051 // We don't need the return value because we'll already have thrown. 2052 return NET_FAILURE_RETRY(env, ssize_t, sendto, javaFd, bytes.get() + byteOffset, byteCount, flags, sa, sa_len); 2053} 2054 2055static void Linux_setegid(JNIEnv* env, jobject, jint egid) { 2056 throwIfMinusOne(env, "setegid", TEMP_FAILURE_RETRY(setegid(egid))); 2057} 2058 2059static void Linux_setenv(JNIEnv* env, jobject, jstring javaName, jstring javaValue, jboolean overwrite) { 2060 ScopedUtfChars name(env, javaName); 2061 if (name.c_str() == NULL) { 2062 return; 2063 } 2064 ScopedUtfChars value(env, javaValue); 2065 if (value.c_str() == NULL) { 2066 return; 2067 } 2068 throwIfMinusOne(env, "setenv", setenv(name.c_str(), value.c_str(), overwrite)); 2069} 2070 2071static void Linux_seteuid(JNIEnv* env, jobject, jint euid) { 2072 throwIfMinusOne(env, "seteuid", TEMP_FAILURE_RETRY(seteuid(euid))); 2073} 2074 2075static void Linux_setgid(JNIEnv* env, jobject, jint gid) { 2076 throwIfMinusOne(env, "setgid", TEMP_FAILURE_RETRY(setgid(gid))); 2077} 2078 2079static void Linux_setpgid(JNIEnv* env, jobject, jint pid, int pgid) { 2080 throwIfMinusOne(env, "setpgid", TEMP_FAILURE_RETRY(setpgid(pid, pgid))); 2081} 2082 2083static void Linux_setregid(JNIEnv* env, jobject, jint rgid, int egid) { 2084 throwIfMinusOne(env, "setregid", TEMP_FAILURE_RETRY(setregid(rgid, egid))); 2085} 2086 2087static void Linux_setreuid(JNIEnv* env, jobject, jint ruid, int euid) { 2088 throwIfMinusOne(env, "setreuid", TEMP_FAILURE_RETRY(setreuid(ruid, euid))); 2089} 2090 2091static jint Linux_setsid(JNIEnv* env, jobject) { 2092 return throwIfMinusOne(env, "setsid", TEMP_FAILURE_RETRY(setsid())); 2093} 2094 2095static void Linux_setsockoptByte(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jint value) { 2096 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2097 u_char byte = value; 2098 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &byte, sizeof(byte)))); 2099} 2100 2101static void Linux_setsockoptIfreq(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jstring javaInterfaceName) { 2102 struct ifreq req; 2103 if (!fillIfreq(env, javaInterfaceName, req)) { 2104 return; 2105 } 2106 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2107 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req, sizeof(req)))); 2108} 2109 2110static void Linux_setsockoptInt(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jint value) { 2111 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2112 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &value, sizeof(value)))); 2113} 2114 2115static void Linux_setsockoptIpMreqn(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jint value) { 2116 ip_mreqn req; 2117 memset(&req, 0, sizeof(req)); 2118 req.imr_ifindex = value; 2119 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2120 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req, sizeof(req)))); 2121} 2122 2123static void Linux_setsockoptGroupReq(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jobject javaGroupReq) { 2124 struct group_req req; 2125 memset(&req, 0, sizeof(req)); 2126 2127 static jfieldID grInterfaceFid = env->GetFieldID(JniConstants::structGroupReqClass, "gr_interface", "I"); 2128 req.gr_interface = env->GetIntField(javaGroupReq, grInterfaceFid); 2129 // Get the IPv4 or IPv6 multicast address to join or leave. 2130 static jfieldID grGroupFid = env->GetFieldID(JniConstants::structGroupReqClass, "gr_group", "Ljava/net/InetAddress;"); 2131 ScopedLocalRef<jobject> javaGroup(env, env->GetObjectField(javaGroupReq, grGroupFid)); 2132 socklen_t sa_len; 2133 if (!inetAddressToSockaddrVerbatim(env, javaGroup.get(), 0, req.gr_group, sa_len)) { 2134 return; 2135 } 2136 2137 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2138 int rc = TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req, sizeof(req))); 2139 if (rc == -1 && errno == EINVAL) { 2140 // Maybe we're a 32-bit binary talking to a 64-bit kernel? 2141 // glibc doesn't automatically handle this. 2142 // http://sourceware.org/bugzilla/show_bug.cgi?id=12080 2143 struct group_req64 { 2144 uint32_t gr_interface; 2145 uint32_t my_padding; 2146 sockaddr_storage gr_group; 2147 }; 2148 group_req64 req64; 2149 req64.gr_interface = req.gr_interface; 2150 memcpy(&req64.gr_group, &req.gr_group, sizeof(req.gr_group)); 2151 rc = TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req64, sizeof(req64))); 2152 } 2153 throwIfMinusOne(env, "setsockopt", rc); 2154} 2155 2156static void Linux_setsockoptGroupSourceReq(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jobject javaGroupSourceReq) { 2157 socklen_t sa_len; 2158 struct group_source_req req; 2159 memset(&req, 0, sizeof(req)); 2160 2161 static jfieldID gsrInterfaceFid = env->GetFieldID(JniConstants::structGroupSourceReqClass, "gsr_interface", "I"); 2162 req.gsr_interface = env->GetIntField(javaGroupSourceReq, gsrInterfaceFid); 2163 // Get the IPv4 or IPv6 multicast address to join or leave. 2164 static jfieldID gsrGroupFid = env->GetFieldID(JniConstants::structGroupSourceReqClass, "gsr_group", "Ljava/net/InetAddress;"); 2165 ScopedLocalRef<jobject> javaGroup(env, env->GetObjectField(javaGroupSourceReq, gsrGroupFid)); 2166 if (!inetAddressToSockaddrVerbatim(env, javaGroup.get(), 0, req.gsr_group, sa_len)) { 2167 return; 2168 } 2169 2170 // Get the IPv4 or IPv6 multicast address to add to the filter. 2171 static jfieldID gsrSourceFid = env->GetFieldID(JniConstants::structGroupSourceReqClass, "gsr_source", "Ljava/net/InetAddress;"); 2172 ScopedLocalRef<jobject> javaSource(env, env->GetObjectField(javaGroupSourceReq, gsrSourceFid)); 2173 if (!inetAddressToSockaddrVerbatim(env, javaSource.get(), 0, req.gsr_source, sa_len)) { 2174 return; 2175 } 2176 2177 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2178 int rc = TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req, sizeof(req))); 2179 if (rc == -1 && errno == EINVAL) { 2180 // Maybe we're a 32-bit binary talking to a 64-bit kernel? 2181 // glibc doesn't automatically handle this. 2182 // http://sourceware.org/bugzilla/show_bug.cgi?id=12080 2183 struct group_source_req64 { 2184 uint32_t gsr_interface; 2185 uint32_t my_padding; 2186 sockaddr_storage gsr_group; 2187 sockaddr_storage gsr_source; 2188 }; 2189 group_source_req64 req64; 2190 req64.gsr_interface = req.gsr_interface; 2191 memcpy(&req64.gsr_group, &req.gsr_group, sizeof(req.gsr_group)); 2192 memcpy(&req64.gsr_source, &req.gsr_source, sizeof(req.gsr_source)); 2193 rc = TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req64, sizeof(req64))); 2194 } 2195 throwIfMinusOne(env, "setsockopt", rc); 2196} 2197 2198static void Linux_setsockoptLinger(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jobject javaLinger) { 2199 static jfieldID lOnoffFid = env->GetFieldID(JniConstants::structLingerClass, "l_onoff", "I"); 2200 static jfieldID lLingerFid = env->GetFieldID(JniConstants::structLingerClass, "l_linger", "I"); 2201 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2202 struct linger value; 2203 value.l_onoff = env->GetIntField(javaLinger, lOnoffFid); 2204 value.l_linger = env->GetIntField(javaLinger, lLingerFid); 2205 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &value, sizeof(value)))); 2206} 2207 2208static void Linux_setsockoptTimeval(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jobject javaTimeval) { 2209 static jfieldID tvSecFid = env->GetFieldID(JniConstants::structTimevalClass, "tv_sec", "J"); 2210 static jfieldID tvUsecFid = env->GetFieldID(JniConstants::structTimevalClass, "tv_usec", "J"); 2211 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2212 struct timeval value; 2213 value.tv_sec = env->GetLongField(javaTimeval, tvSecFid); 2214 value.tv_usec = env->GetLongField(javaTimeval, tvUsecFid); 2215 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &value, sizeof(value)))); 2216} 2217 2218static void Linux_setuid(JNIEnv* env, jobject, jint uid) { 2219 throwIfMinusOne(env, "setuid", TEMP_FAILURE_RETRY(setuid(uid))); 2220} 2221 2222static void Linux_setxattr(JNIEnv* env, jobject, jstring javaPath, jstring javaName, 2223 jbyteArray javaValue, jint flags) { 2224 ScopedUtfChars path(env, javaPath); 2225 if (path.c_str() == NULL) { 2226 return; 2227 } 2228 ScopedUtfChars name(env, javaName); 2229 if (name.c_str() == NULL) { 2230 return; 2231 } 2232 ScopedBytesRO value(env, javaValue); 2233 if (value.get() == NULL) { 2234 return; 2235 } 2236 size_t valueLength = env->GetArrayLength(javaValue); 2237 int res = setxattr(path.c_str(), name.c_str(), value.get(), valueLength, flags); 2238 if (res < 0) { 2239 throwErrnoException(env, "setxattr"); 2240 } 2241} 2242 2243static void Linux_shutdown(JNIEnv* env, jobject, jobject javaFd, jint how) { 2244 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2245 throwIfMinusOne(env, "shutdown", TEMP_FAILURE_RETRY(shutdown(fd, how))); 2246} 2247 2248static jobject Linux_socket(JNIEnv* env, jobject, jint domain, jint type, jint protocol) { 2249 if (domain == AF_PACKET) { 2250 protocol = htons(protocol); // Packet sockets specify the protocol in host byte order. 2251 } 2252 int fd = throwIfMinusOne(env, "socket", TEMP_FAILURE_RETRY(socket(domain, type, protocol))); 2253 return fd != -1 ? jniCreateFileDescriptor(env, fd) : NULL; 2254} 2255 2256static void Linux_socketpair(JNIEnv* env, jobject, jint domain, jint type, jint protocol, jobject javaFd1, jobject javaFd2) { 2257 int fds[2]; 2258 int rc = throwIfMinusOne(env, "socketpair", TEMP_FAILURE_RETRY(socketpair(domain, type, protocol, fds))); 2259 if (rc != -1) { 2260 jniSetFileDescriptorOfFD(env, javaFd1, fds[0]); 2261 jniSetFileDescriptorOfFD(env, javaFd2, fds[1]); 2262 } 2263} 2264 2265static jobject Linux_stat(JNIEnv* env, jobject, jstring javaPath) { 2266 return doStat(env, javaPath, false); 2267} 2268 2269static jobject Linux_statvfs(JNIEnv* env, jobject, jstring javaPath) { 2270 ScopedUtfChars path(env, javaPath); 2271 if (path.c_str() == NULL) { 2272 return NULL; 2273 } 2274 struct statvfs sb; 2275 int rc = TEMP_FAILURE_RETRY(statvfs(path.c_str(), &sb)); 2276 if (rc == -1) { 2277 throwErrnoException(env, "statvfs"); 2278 return NULL; 2279 } 2280 return makeStructStatVfs(env, sb); 2281} 2282 2283static jstring Linux_strerror(JNIEnv* env, jobject, jint errnum) { 2284 char buffer[BUFSIZ]; 2285 const char* message = jniStrError(errnum, buffer, sizeof(buffer)); 2286 return env->NewStringUTF(message); 2287} 2288 2289static jstring Linux_strsignal(JNIEnv* env, jobject, jint signal) { 2290 return env->NewStringUTF(strsignal(signal)); 2291} 2292 2293static void Linux_symlink(JNIEnv* env, jobject, jstring javaOldPath, jstring javaNewPath) { 2294 ScopedUtfChars oldPath(env, javaOldPath); 2295 if (oldPath.c_str() == NULL) { 2296 return; 2297 } 2298 ScopedUtfChars newPath(env, javaNewPath); 2299 if (newPath.c_str() == NULL) { 2300 return; 2301 } 2302 throwIfMinusOne(env, "symlink", TEMP_FAILURE_RETRY(symlink(oldPath.c_str(), newPath.c_str()))); 2303} 2304 2305static jlong Linux_sysconf(JNIEnv* env, jobject, jint name) { 2306 // Since -1 is a valid result from sysconf(3), detecting failure is a little more awkward. 2307 errno = 0; 2308 long result = sysconf(name); 2309 if (result == -1L && errno == EINVAL) { 2310 throwErrnoException(env, "sysconf"); 2311 } 2312 return result; 2313} 2314 2315static void Linux_tcdrain(JNIEnv* env, jobject, jobject javaFd) { 2316 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2317 throwIfMinusOne(env, "tcdrain", TEMP_FAILURE_RETRY(tcdrain(fd))); 2318} 2319 2320static void Linux_tcsendbreak(JNIEnv* env, jobject, jobject javaFd, jint duration) { 2321 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2322 throwIfMinusOne(env, "tcsendbreak", TEMP_FAILURE_RETRY(tcsendbreak(fd, duration))); 2323} 2324 2325static jint Linux_umaskImpl(JNIEnv*, jobject, jint mask) { 2326 return umask(mask); 2327} 2328 2329static jobject Linux_uname(JNIEnv* env, jobject) { 2330 struct utsname buf; 2331 if (TEMP_FAILURE_RETRY(uname(&buf)) == -1) { 2332 return NULL; // Can't happen. 2333 } 2334 return makeStructUtsname(env, buf); 2335} 2336 2337static void Linux_unlink(JNIEnv* env, jobject, jstring javaPathname) { 2338 ScopedUtfChars pathname(env, javaPathname); 2339 if (pathname.c_str() == NULL) { 2340 return; 2341 } 2342 throwIfMinusOne(env, "unlink", unlink(pathname.c_str())); 2343} 2344 2345static void Linux_unsetenv(JNIEnv* env, jobject, jstring javaName) { 2346 ScopedUtfChars name(env, javaName); 2347 if (name.c_str() == NULL) { 2348 return; 2349 } 2350 throwIfMinusOne(env, "unsetenv", unsetenv(name.c_str())); 2351} 2352 2353static jint Linux_waitpid(JNIEnv* env, jobject, jint pid, jobject javaStatus, jint options) { 2354 int status; 2355 int rc = throwIfMinusOne(env, "waitpid", TEMP_FAILURE_RETRY(waitpid(pid, &status, options))); 2356 if (rc != -1) { 2357 static jfieldID valueFid = env->GetFieldID(JniConstants::mutableIntClass, "value", "I"); 2358 env->SetIntField(javaStatus, valueFid, status); 2359 } 2360 return rc; 2361} 2362 2363static jint Linux_writeBytes(JNIEnv* env, jobject, jobject javaFd, jbyteArray javaBytes, jint byteOffset, jint byteCount) { 2364 ScopedBytesRO bytes(env, javaBytes); 2365 if (bytes.get() == NULL) { 2366 return -1; 2367 } 2368 return IO_FAILURE_RETRY(env, ssize_t, write, javaFd, bytes.get() + byteOffset, byteCount); 2369} 2370 2371static jint Linux_writev(JNIEnv* env, jobject, jobject javaFd, jobjectArray buffers, jintArray offsets, jintArray byteCounts) { 2372 IoVec<ScopedBytesRO> ioVec(env, env->GetArrayLength(buffers)); 2373 if (!ioVec.init(buffers, offsets, byteCounts)) { 2374 return -1; 2375 } 2376 return IO_FAILURE_RETRY(env, ssize_t, writev, javaFd, ioVec.get(), ioVec.size()); 2377} 2378 2379#define NATIVE_METHOD_OVERLOAD(className, functionName, signature, variant) \ 2380 { #functionName, signature, reinterpret_cast<void*>(className ## _ ## functionName ## variant) } 2381 2382static JNINativeMethod gMethods[] = { 2383 NATIVE_METHOD(Linux, accept, "(Ljava/io/FileDescriptor;Ljava/net/SocketAddress;)Ljava/io/FileDescriptor;"), 2384 NATIVE_METHOD(Linux, access, "(Ljava/lang/String;I)Z"), 2385 NATIVE_METHOD(Linux, android_getaddrinfo, "(Ljava/lang/String;Landroid/system/StructAddrinfo;I)[Ljava/net/InetAddress;"), 2386 NATIVE_METHOD(Linux, bind, "(Ljava/io/FileDescriptor;Ljava/net/InetAddress;I)V"), 2387 NATIVE_METHOD_OVERLOAD(Linux, bind, "(Ljava/io/FileDescriptor;Ljava/net/SocketAddress;)V", SocketAddress), 2388 NATIVE_METHOD(Linux, capget, 2389 "(Landroid/system/StructCapUserHeader;)[Landroid/system/StructCapUserData;"), 2390 NATIVE_METHOD(Linux, capset, 2391 "(Landroid/system/StructCapUserHeader;[Landroid/system/StructCapUserData;)V"), 2392 NATIVE_METHOD(Linux, chmod, "(Ljava/lang/String;I)V"), 2393 NATIVE_METHOD(Linux, chown, "(Ljava/lang/String;II)V"), 2394 NATIVE_METHOD(Linux, close, "(Ljava/io/FileDescriptor;)V"), 2395 NATIVE_METHOD(Linux, connect, "(Ljava/io/FileDescriptor;Ljava/net/InetAddress;I)V"), 2396 NATIVE_METHOD_OVERLOAD(Linux, connect, "(Ljava/io/FileDescriptor;Ljava/net/SocketAddress;)V", SocketAddress), 2397 NATIVE_METHOD(Linux, dup, "(Ljava/io/FileDescriptor;)Ljava/io/FileDescriptor;"), 2398 NATIVE_METHOD(Linux, dup2, "(Ljava/io/FileDescriptor;I)Ljava/io/FileDescriptor;"), 2399 NATIVE_METHOD(Linux, environ, "()[Ljava/lang/String;"), 2400 NATIVE_METHOD(Linux, execv, "(Ljava/lang/String;[Ljava/lang/String;)V"), 2401 NATIVE_METHOD(Linux, execve, "(Ljava/lang/String;[Ljava/lang/String;[Ljava/lang/String;)V"), 2402 NATIVE_METHOD(Linux, fchmod, "(Ljava/io/FileDescriptor;I)V"), 2403 NATIVE_METHOD(Linux, fchown, "(Ljava/io/FileDescriptor;II)V"), 2404 NATIVE_METHOD(Linux, fcntlFlock, "(Ljava/io/FileDescriptor;ILandroid/system/StructFlock;)I"), 2405 NATIVE_METHOD(Linux, fcntlInt, "(Ljava/io/FileDescriptor;II)I"), 2406 NATIVE_METHOD(Linux, fcntlVoid, "(Ljava/io/FileDescriptor;I)I"), 2407 NATIVE_METHOD(Linux, fdatasync, "(Ljava/io/FileDescriptor;)V"), 2408 NATIVE_METHOD(Linux, fstat, "(Ljava/io/FileDescriptor;)Landroid/system/StructStat;"), 2409 NATIVE_METHOD(Linux, fstatvfs, "(Ljava/io/FileDescriptor;)Landroid/system/StructStatVfs;"), 2410 NATIVE_METHOD(Linux, fsync, "(Ljava/io/FileDescriptor;)V"), 2411 NATIVE_METHOD(Linux, ftruncate, "(Ljava/io/FileDescriptor;J)V"), 2412 NATIVE_METHOD(Linux, gai_strerror, "(I)Ljava/lang/String;"), 2413 NATIVE_METHOD(Linux, getegid, "()I"), 2414 NATIVE_METHOD(Linux, geteuid, "()I"), 2415 NATIVE_METHOD(Linux, getgid, "()I"), 2416 NATIVE_METHOD(Linux, getenv, "(Ljava/lang/String;)Ljava/lang/String;"), 2417 NATIVE_METHOD(Linux, getnameinfo, "(Ljava/net/InetAddress;I)Ljava/lang/String;"), 2418 NATIVE_METHOD(Linux, getpeername, "(Ljava/io/FileDescriptor;)Ljava/net/SocketAddress;"), 2419 NATIVE_METHOD(Linux, getpgid, "(I)I"), 2420 NATIVE_METHOD(Linux, getpid, "()I"), 2421 NATIVE_METHOD(Linux, getppid, "()I"), 2422 NATIVE_METHOD(Linux, getpwnam, "(Ljava/lang/String;)Landroid/system/StructPasswd;"), 2423 NATIVE_METHOD(Linux, getpwuid, "(I)Landroid/system/StructPasswd;"), 2424 NATIVE_METHOD(Linux, getsockname, "(Ljava/io/FileDescriptor;)Ljava/net/SocketAddress;"), 2425 NATIVE_METHOD(Linux, getsockoptByte, "(Ljava/io/FileDescriptor;II)I"), 2426 NATIVE_METHOD(Linux, getsockoptInAddr, "(Ljava/io/FileDescriptor;II)Ljava/net/InetAddress;"), 2427 NATIVE_METHOD(Linux, getsockoptInt, "(Ljava/io/FileDescriptor;II)I"), 2428 NATIVE_METHOD(Linux, getsockoptLinger, "(Ljava/io/FileDescriptor;II)Landroid/system/StructLinger;"), 2429 NATIVE_METHOD(Linux, getsockoptTimeval, "(Ljava/io/FileDescriptor;II)Landroid/system/StructTimeval;"), 2430 NATIVE_METHOD(Linux, getsockoptUcred, "(Ljava/io/FileDescriptor;II)Landroid/system/StructUcred;"), 2431 NATIVE_METHOD(Linux, gettid, "()I"), 2432 NATIVE_METHOD(Linux, getuid, "()I"), 2433 NATIVE_METHOD(Linux, getxattr, "(Ljava/lang/String;Ljava/lang/String;)[B"), 2434 NATIVE_METHOD(Linux, getifaddrs, "()[Landroid/system/StructIfaddrs;"), 2435 NATIVE_METHOD(Linux, if_indextoname, "(I)Ljava/lang/String;"), 2436 NATIVE_METHOD(Linux, if_nametoindex, "(Ljava/lang/String;)I"), 2437 NATIVE_METHOD(Linux, inet_pton, "(ILjava/lang/String;)Ljava/net/InetAddress;"), 2438 NATIVE_METHOD(Linux, ioctlFlags, "(Ljava/io/FileDescriptor;Ljava/lang/String;)I"), 2439 NATIVE_METHOD(Linux, ioctlInetAddress, "(Ljava/io/FileDescriptor;ILjava/lang/String;)Ljava/net/InetAddress;"), 2440 NATIVE_METHOD(Linux, ioctlInt, "(Ljava/io/FileDescriptor;ILandroid/util/MutableInt;)I"), 2441 NATIVE_METHOD(Linux, ioctlMTU, "(Ljava/io/FileDescriptor;Ljava/lang/String;)I"), 2442 NATIVE_METHOD(Linux, isatty, "(Ljava/io/FileDescriptor;)Z"), 2443 NATIVE_METHOD(Linux, kill, "(II)V"), 2444 NATIVE_METHOD(Linux, lchown, "(Ljava/lang/String;II)V"), 2445 NATIVE_METHOD(Linux, link, "(Ljava/lang/String;Ljava/lang/String;)V"), 2446 NATIVE_METHOD(Linux, listen, "(Ljava/io/FileDescriptor;I)V"), 2447 NATIVE_METHOD(Linux, listxattr, "(Ljava/lang/String;)[Ljava/lang/String;"), 2448 NATIVE_METHOD(Linux, lseek, "(Ljava/io/FileDescriptor;JI)J"), 2449 NATIVE_METHOD(Linux, lstat, "(Ljava/lang/String;)Landroid/system/StructStat;"), 2450 NATIVE_METHOD(Linux, mincore, "(JJ[B)V"), 2451 NATIVE_METHOD(Linux, mkdir, "(Ljava/lang/String;I)V"), 2452 NATIVE_METHOD(Linux, mkfifo, "(Ljava/lang/String;I)V"), 2453 NATIVE_METHOD(Linux, mlock, "(JJ)V"), 2454 NATIVE_METHOD(Linux, mmap, "(JJIILjava/io/FileDescriptor;J)J"), 2455 NATIVE_METHOD(Linux, msync, "(JJI)V"), 2456 NATIVE_METHOD(Linux, munlock, "(JJ)V"), 2457 NATIVE_METHOD(Linux, munmap, "(JJ)V"), 2458 NATIVE_METHOD(Linux, open, "(Ljava/lang/String;II)Ljava/io/FileDescriptor;"), 2459 NATIVE_METHOD(Linux, pipe2, "(I)[Ljava/io/FileDescriptor;"), 2460 NATIVE_METHOD(Linux, poll, "([Landroid/system/StructPollfd;I)I"), 2461 NATIVE_METHOD(Linux, posix_fallocate, "(Ljava/io/FileDescriptor;JJ)V"), 2462 NATIVE_METHOD(Linux, prctl, "(IJJJJ)I"), 2463 NATIVE_METHOD(Linux, preadBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIJ)I"), 2464 NATIVE_METHOD(Linux, pwriteBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIJ)I"), 2465 NATIVE_METHOD(Linux, readBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;II)I"), 2466 NATIVE_METHOD(Linux, readlink, "(Ljava/lang/String;)Ljava/lang/String;"), 2467 NATIVE_METHOD(Linux, realpath, "(Ljava/lang/String;)Ljava/lang/String;"), 2468 NATIVE_METHOD(Linux, readv, "(Ljava/io/FileDescriptor;[Ljava/lang/Object;[I[I)I"), 2469 NATIVE_METHOD(Linux, recvfromBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIILjava/net/InetSocketAddress;)I"), 2470 NATIVE_METHOD(Linux, remove, "(Ljava/lang/String;)V"), 2471 NATIVE_METHOD(Linux, removexattr, "(Ljava/lang/String;Ljava/lang/String;)V"), 2472 NATIVE_METHOD(Linux, rename, "(Ljava/lang/String;Ljava/lang/String;)V"), 2473 NATIVE_METHOD(Linux, sendfile, "(Ljava/io/FileDescriptor;Ljava/io/FileDescriptor;Landroid/util/MutableLong;J)J"), 2474 NATIVE_METHOD(Linux, sendtoBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIILjava/net/InetAddress;I)I"), 2475 NATIVE_METHOD_OVERLOAD(Linux, sendtoBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIILjava/net/SocketAddress;)I", SocketAddress), 2476 NATIVE_METHOD(Linux, setegid, "(I)V"), 2477 NATIVE_METHOD(Linux, setenv, "(Ljava/lang/String;Ljava/lang/String;Z)V"), 2478 NATIVE_METHOD(Linux, seteuid, "(I)V"), 2479 NATIVE_METHOD(Linux, setgid, "(I)V"), 2480 NATIVE_METHOD(Linux, setpgid, "(II)V"), 2481 NATIVE_METHOD(Linux, setregid, "(II)V"), 2482 NATIVE_METHOD(Linux, setreuid, "(II)V"), 2483 NATIVE_METHOD(Linux, setsid, "()I"), 2484 NATIVE_METHOD(Linux, setsockoptByte, "(Ljava/io/FileDescriptor;III)V"), 2485 NATIVE_METHOD(Linux, setsockoptIfreq, "(Ljava/io/FileDescriptor;IILjava/lang/String;)V"), 2486 NATIVE_METHOD(Linux, setsockoptInt, "(Ljava/io/FileDescriptor;III)V"), 2487 NATIVE_METHOD(Linux, setsockoptIpMreqn, "(Ljava/io/FileDescriptor;III)V"), 2488 NATIVE_METHOD(Linux, setsockoptGroupReq, "(Ljava/io/FileDescriptor;IILandroid/system/StructGroupReq;)V"), 2489 NATIVE_METHOD(Linux, setsockoptGroupSourceReq, "(Ljava/io/FileDescriptor;IILandroid/system/StructGroupSourceReq;)V"), 2490 NATIVE_METHOD(Linux, setsockoptLinger, "(Ljava/io/FileDescriptor;IILandroid/system/StructLinger;)V"), 2491 NATIVE_METHOD(Linux, setsockoptTimeval, "(Ljava/io/FileDescriptor;IILandroid/system/StructTimeval;)V"), 2492 NATIVE_METHOD(Linux, setuid, "(I)V"), 2493 NATIVE_METHOD(Linux, setxattr, "(Ljava/lang/String;Ljava/lang/String;[BI)V"), 2494 NATIVE_METHOD(Linux, shutdown, "(Ljava/io/FileDescriptor;I)V"), 2495 NATIVE_METHOD(Linux, socket, "(III)Ljava/io/FileDescriptor;"), 2496 NATIVE_METHOD(Linux, socketpair, "(IIILjava/io/FileDescriptor;Ljava/io/FileDescriptor;)V"), 2497 NATIVE_METHOD(Linux, stat, "(Ljava/lang/String;)Landroid/system/StructStat;"), 2498 NATIVE_METHOD(Linux, statvfs, "(Ljava/lang/String;)Landroid/system/StructStatVfs;"), 2499 NATIVE_METHOD(Linux, strerror, "(I)Ljava/lang/String;"), 2500 NATIVE_METHOD(Linux, strsignal, "(I)Ljava/lang/String;"), 2501 NATIVE_METHOD(Linux, symlink, "(Ljava/lang/String;Ljava/lang/String;)V"), 2502 NATIVE_METHOD(Linux, sysconf, "(I)J"), 2503 NATIVE_METHOD(Linux, tcdrain, "(Ljava/io/FileDescriptor;)V"), 2504 NATIVE_METHOD(Linux, tcsendbreak, "(Ljava/io/FileDescriptor;I)V"), 2505 NATIVE_METHOD(Linux, umaskImpl, "(I)I"), 2506 NATIVE_METHOD(Linux, uname, "()Landroid/system/StructUtsname;"), 2507 NATIVE_METHOD(Linux, unlink, "(Ljava/lang/String;)V"), 2508 NATIVE_METHOD(Linux, unsetenv, "(Ljava/lang/String;)V"), 2509 NATIVE_METHOD(Linux, waitpid, "(ILandroid/util/MutableInt;I)I"), 2510 NATIVE_METHOD(Linux, writeBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;II)I"), 2511 NATIVE_METHOD(Linux, writev, "(Ljava/io/FileDescriptor;[Ljava/lang/Object;[I[I)I"), 2512}; 2513void register_libcore_io_Linux(JNIEnv* env) { 2514 jniRegisterNativeMethods(env, "libcore/io/Linux", gMethods, NELEM(gMethods)); 2515} 2516