libcore_io_Linux.cpp revision 5744e4a762ca12243b47dd8aed24d87d963b4d3b
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 makeStructStat(JNIEnv* env, const struct stat64& sb) { 427 static jmethodID ctor = env->GetMethodID(JniConstants::structStatClass, "<init>", 428 "(JJIJIIJJJJJJJ)V"); 429 return env->NewObject(JniConstants::structStatClass, ctor, 430 static_cast<jlong>(sb.st_dev), static_cast<jlong>(sb.st_ino), 431 static_cast<jint>(sb.st_mode), static_cast<jlong>(sb.st_nlink), 432 static_cast<jint>(sb.st_uid), static_cast<jint>(sb.st_gid), 433 static_cast<jlong>(sb.st_rdev), static_cast<jlong>(sb.st_size), 434 static_cast<jlong>(sb.st_atime), static_cast<jlong>(sb.st_mtime), 435 static_cast<jlong>(sb.st_ctime), static_cast<jlong>(sb.st_blksize), 436 static_cast<jlong>(sb.st_blocks)); 437} 438 439static jobject makeStructStatVfs(JNIEnv* env, const struct statvfs& sb) { 440 static jmethodID ctor = env->GetMethodID(JniConstants::structStatVfsClass, "<init>", 441 "(JJJJJJJJJJJ)V"); 442 return env->NewObject(JniConstants::structStatVfsClass, ctor, 443 static_cast<jlong>(sb.f_bsize), 444 static_cast<jlong>(sb.f_frsize), 445 static_cast<jlong>(sb.f_blocks), 446 static_cast<jlong>(sb.f_bfree), 447 static_cast<jlong>(sb.f_bavail), 448 static_cast<jlong>(sb.f_files), 449 static_cast<jlong>(sb.f_ffree), 450 static_cast<jlong>(sb.f_favail), 451 static_cast<jlong>(sb.f_fsid), 452 static_cast<jlong>(sb.f_flag), 453 static_cast<jlong>(sb.f_namemax)); 454} 455 456static jobject makeStructLinger(JNIEnv* env, const struct linger& l) { 457 static jmethodID ctor = env->GetMethodID(JniConstants::structLingerClass, "<init>", "(II)V"); 458 return env->NewObject(JniConstants::structLingerClass, ctor, l.l_onoff, l.l_linger); 459} 460 461static jobject makeStructTimeval(JNIEnv* env, const struct timeval& tv) { 462 static jmethodID ctor = env->GetMethodID(JniConstants::structTimevalClass, "<init>", "(JJ)V"); 463 return env->NewObject(JniConstants::structTimevalClass, ctor, 464 static_cast<jlong>(tv.tv_sec), static_cast<jlong>(tv.tv_usec)); 465} 466 467static jobject makeStructUcred(JNIEnv* env, const struct ucred& u __unused) { 468 static jmethodID ctor = env->GetMethodID(JniConstants::structUcredClass, "<init>", "(III)V"); 469 return env->NewObject(JniConstants::structUcredClass, ctor, u.pid, u.uid, u.gid); 470} 471 472static jobject makeStructUtsname(JNIEnv* env, const struct utsname& buf) { 473 TO_JAVA_STRING(sysname, buf.sysname); 474 TO_JAVA_STRING(nodename, buf.nodename); 475 TO_JAVA_STRING(release, buf.release); 476 TO_JAVA_STRING(version, buf.version); 477 TO_JAVA_STRING(machine, buf.machine); 478 static jmethodID ctor = env->GetMethodID(JniConstants::structUtsnameClass, "<init>", 479 "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V"); 480 return env->NewObject(JniConstants::structUtsnameClass, ctor, 481 sysname, nodename, release, version, machine); 482}; 483 484static bool fillIfreq(JNIEnv* env, jstring javaInterfaceName, struct ifreq& req) { 485 ScopedUtfChars interfaceName(env, javaInterfaceName); 486 if (interfaceName.c_str() == NULL) { 487 return false; 488 } 489 memset(&req, 0, sizeof(req)); 490 strncpy(req.ifr_name, interfaceName.c_str(), sizeof(req.ifr_name)); 491 req.ifr_name[sizeof(req.ifr_name) - 1] = '\0'; 492 return true; 493} 494 495static bool fillUnixSocketAddress(JNIEnv* env, jobject javaUnixSocketAddress, 496 const sockaddr_storage& ss, const socklen_t& sa_len) { 497 if (javaUnixSocketAddress == NULL) { 498 return true; 499 } 500 jbyteArray javaSunPath = getUnixSocketPath(env, ss, sa_len); 501 if (!javaSunPath) { 502 return false; 503 } 504 505 static jfieldID sunPathFid = 506 env->GetFieldID(JniConstants::unixSocketAddressClass, "sun_path", "[B"); 507 env->SetObjectField(javaUnixSocketAddress, sunPathFid, javaSunPath); 508 return true; 509} 510 511static bool fillInetSocketAddress(JNIEnv* env, jobject javaInetSocketAddress, 512 const sockaddr_storage& ss) { 513 if (javaInetSocketAddress == NULL) { 514 return true; 515 } 516 // Fill out the passed-in InetSocketAddress with the sender's IP address and port number. 517 jint port; 518 jobject sender = sockaddrToInetAddress(env, ss, &port); 519 if (sender == NULL) { 520 return false; 521 } 522 static jfieldID holderFid = env->GetFieldID(JniConstants::inetSocketAddressClass, "holder", 523 "Ljava/net/InetSocketAddress$InetSocketAddressHolder;"); 524 jobject holder = env->GetObjectField(javaInetSocketAddress, holderFid); 525 526 static jfieldID addressFid = env->GetFieldID(JniConstants::inetSocketAddressHolderClass, 527 "addr", "Ljava/net/InetAddress;"); 528 static jfieldID portFid = env->GetFieldID(JniConstants::inetSocketAddressHolderClass, "port", "I"); 529 env->SetObjectField(holder, addressFid, sender); 530 env->SetIntField(holder, portFid, port); 531 return true; 532} 533 534static bool fillSocketAddress(JNIEnv* env, jobject javaSocketAddress, const sockaddr_storage& ss, 535 const socklen_t& sa_len) { 536 if (javaSocketAddress == NULL) { 537 return true; 538 } 539 540 if (env->IsInstanceOf(javaSocketAddress, JniConstants::inetSocketAddressClass)) { 541 return fillInetSocketAddress(env, javaSocketAddress, ss); 542 } else if (env->IsInstanceOf(javaSocketAddress, JniConstants::unixSocketAddressClass)) { 543 return fillUnixSocketAddress(env, javaSocketAddress, ss, sa_len); 544 } 545 jniThrowException(env, "java/lang/UnsupportedOperationException", 546 "unsupported SocketAddress subclass"); 547 return false; 548 549} 550 551static void javaInetSocketAddressToInetAddressAndPort( 552 JNIEnv* env, jobject javaInetSocketAddress, jobject& javaInetAddress, jint& port) { 553 static jfieldID holderFid = env->GetFieldID(JniConstants::inetSocketAddressClass, "holder", 554 "Ljava/net/InetSocketAddress$InetSocketAddressHolder;"); 555 jobject holder = env->GetObjectField(javaInetSocketAddress, holderFid); 556 557 static jfieldID addressFid = env->GetFieldID( 558 JniConstants::inetSocketAddressHolderClass, "addr", "Ljava/net/InetAddress;"); 559 static jfieldID portFid = env->GetFieldID(JniConstants::inetSocketAddressHolderClass, "port", "I"); 560 561 javaInetAddress = env->GetObjectField(holder, addressFid); 562 port = env->GetIntField(holder, portFid); 563} 564 565static bool javaInetSocketAddressToSockaddr( 566 JNIEnv* env, jobject javaSocketAddress, sockaddr_storage& ss, socklen_t& sa_len) { 567 jobject javaInetAddress; 568 jint port; 569 javaInetSocketAddressToInetAddressAndPort(env, javaSocketAddress, javaInetAddress, port); 570 return inetAddressToSockaddr(env, javaInetAddress, port, ss, sa_len); 571} 572 573static bool javaNetlinkSocketAddressToSockaddr( 574 JNIEnv* env, jobject javaSocketAddress, sockaddr_storage& ss, socklen_t& sa_len) { 575 static jfieldID nlPidFid = env->GetFieldID( 576 JniConstants::netlinkSocketAddressClass, "nlPortId", "I"); 577 static jfieldID nlGroupsFid = env->GetFieldID( 578 JniConstants::netlinkSocketAddressClass, "nlGroupsMask", "I"); 579 580 sockaddr_nl *nlAddr = reinterpret_cast<sockaddr_nl *>(&ss); 581 nlAddr->nl_family = AF_NETLINK; 582 nlAddr->nl_pid = env->GetIntField(javaSocketAddress, nlPidFid); 583 nlAddr->nl_groups = env->GetIntField(javaSocketAddress, nlGroupsFid); 584 sa_len = sizeof(sockaddr_nl); 585 return true; 586} 587 588static bool javaUnixSocketAddressToSockaddr( 589 JNIEnv* env, jobject javaUnixSocketAddress, sockaddr_storage& ss, socklen_t& sa_len) { 590 static jfieldID sunPathFid = env->GetFieldID( 591 JniConstants::unixSocketAddressClass, "sun_path", "[B"); 592 593 struct sockaddr_un* un_addr = reinterpret_cast<struct sockaddr_un*>(&ss); 594 memset (un_addr, 0, sizeof(sockaddr_un)); 595 un_addr->sun_family = AF_UNIX; 596 597 jbyteArray javaSunPath = (jbyteArray) env->GetObjectField(javaUnixSocketAddress, sunPathFid); 598 jsize pathLength = env->GetArrayLength(javaSunPath); 599 if ((size_t) pathLength > sizeof(sockaddr_un::sun_path)) { 600 jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException", 601 "sun_path too long: max=%i, is=%i", 602 sizeof(sockaddr_un::sun_path), pathLength); 603 return false; 604 } 605 env->GetByteArrayRegion(javaSunPath, 0, pathLength, (jbyte*) un_addr->sun_path); 606 // sa_len is sun_path plus the length of the overhead (ss_family_t). See unix(7) for 607 // details. This calculation must match that of socket_make_sockaddr_un() in 608 // socket_local_client.c and getUnixSocketPath() to interoperate. 609 sa_len = offsetof(struct sockaddr_un, sun_path) + pathLength; 610 return true; 611} 612 613static bool javaPacketSocketAddressToSockaddr( 614 JNIEnv* env, jobject javaSocketAddress, sockaddr_storage& ss, socklen_t& sa_len) { 615 static jfieldID protocolFid = env->GetFieldID( 616 JniConstants::packetSocketAddressClass, "sll_protocol", "S"); 617 static jfieldID ifindexFid = env->GetFieldID( 618 JniConstants::packetSocketAddressClass, "sll_ifindex", "I"); 619 static jfieldID hatypeFid = env->GetFieldID( 620 JniConstants::packetSocketAddressClass, "sll_hatype", "S"); 621 static jfieldID pkttypeFid = env->GetFieldID( 622 JniConstants::packetSocketAddressClass, "sll_pkttype", "B"); 623 static jfieldID addrFid = env->GetFieldID( 624 JniConstants::packetSocketAddressClass, "sll_addr", "[B"); 625 626 sockaddr_ll *sll = reinterpret_cast<sockaddr_ll *>(&ss); 627 sll->sll_family = AF_PACKET; 628 sll->sll_protocol = htons(env->GetShortField(javaSocketAddress, protocolFid)); 629 sll->sll_ifindex = env->GetIntField(javaSocketAddress, ifindexFid); 630 sll->sll_hatype = env->GetShortField(javaSocketAddress, hatypeFid); 631 sll->sll_pkttype = env->GetByteField(javaSocketAddress, pkttypeFid); 632 633 jbyteArray sllAddr = (jbyteArray) env->GetObjectField(javaSocketAddress, addrFid); 634 if (sllAddr == NULL) { 635 sll->sll_halen = 0; 636 memset(&sll->sll_addr, 0, sizeof(sll->sll_addr)); 637 } else { 638 jsize len = env->GetArrayLength(sllAddr); 639 if ((size_t) len > sizeof(sll->sll_addr)) { 640 len = sizeof(sll->sll_addr); 641 } 642 sll->sll_halen = len; 643 env->GetByteArrayRegion(sllAddr, 0, len, (jbyte*) sll->sll_addr); 644 } 645 sa_len = sizeof(sockaddr_ll); 646 return true; 647} 648 649static bool javaSocketAddressToSockaddr( 650 JNIEnv* env, jobject javaSocketAddress, sockaddr_storage& ss, socklen_t& sa_len) { 651 if (javaSocketAddress == NULL) { 652 jniThrowNullPointerException(env, NULL); 653 return false; 654 } 655 656 if (env->IsInstanceOf(javaSocketAddress, JniConstants::netlinkSocketAddressClass)) { 657 return javaNetlinkSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len); 658 } else if (env->IsInstanceOf(javaSocketAddress, JniConstants::inetSocketAddressClass)) { 659 return javaInetSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len); 660 } else if (env->IsInstanceOf(javaSocketAddress, JniConstants::packetSocketAddressClass)) { 661 return javaPacketSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len); 662 } else if (env->IsInstanceOf(javaSocketAddress, JniConstants::unixSocketAddressClass)) { 663 return javaUnixSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len); 664 } 665 jniThrowException(env, "java/lang/UnsupportedOperationException", 666 "unsupported SocketAddress subclass"); 667 return false; 668} 669 670static jobject doStat(JNIEnv* env, jstring javaPath, bool isLstat) { 671 ScopedUtfChars path(env, javaPath); 672 if (path.c_str() == NULL) { 673 return NULL; 674 } 675 struct stat64 sb; 676 int rc = isLstat ? TEMP_FAILURE_RETRY(lstat64(path.c_str(), &sb)) 677 : TEMP_FAILURE_RETRY(stat64(path.c_str(), &sb)); 678 if (rc == -1) { 679 throwErrnoException(env, isLstat ? "lstat" : "stat"); 680 return NULL; 681 } 682 return makeStructStat(env, sb); 683} 684 685static jobject doGetSockName(JNIEnv* env, jobject javaFd, bool is_sockname) { 686 int fd = jniGetFDFromFileDescriptor(env, javaFd); 687 sockaddr_storage ss; 688 sockaddr* sa = reinterpret_cast<sockaddr*>(&ss); 689 socklen_t byteCount = sizeof(ss); 690 memset(&ss, 0, byteCount); 691 int rc = is_sockname ? TEMP_FAILURE_RETRY(getsockname(fd, sa, &byteCount)) 692 : TEMP_FAILURE_RETRY(getpeername(fd, sa, &byteCount)); 693 if (rc == -1) { 694 throwErrnoException(env, is_sockname ? "getsockname" : "getpeername"); 695 return NULL; 696 } 697 return makeSocketAddress(env, ss, byteCount); 698} 699 700class Passwd { 701public: 702 explicit Passwd(JNIEnv* env) : mEnv(env), mResult(NULL) { 703 mBufferSize = sysconf(_SC_GETPW_R_SIZE_MAX); 704 mBuffer.reset(new char[mBufferSize]); 705 } 706 707 jobject getpwnam(const char* name) { 708 return process("getpwnam_r", getpwnam_r(name, &mPwd, mBuffer.get(), mBufferSize, &mResult)); 709 } 710 711 jobject getpwuid(uid_t uid) { 712 return process("getpwuid_r", getpwuid_r(uid, &mPwd, mBuffer.get(), mBufferSize, &mResult)); 713 } 714 715 struct passwd* get() { 716 return mResult; 717 } 718 719private: 720 jobject process(const char* syscall, int error) { 721 if (mResult == NULL) { 722 errno = error; 723 throwErrnoException(mEnv, syscall); 724 return NULL; 725 } 726 return makeStructPasswd(mEnv, *mResult); 727 } 728 729 JNIEnv* mEnv; 730 std::unique_ptr<char[]> mBuffer; 731 size_t mBufferSize; 732 struct passwd mPwd; 733 struct passwd* mResult; 734}; 735 736static void AssertException(JNIEnv* env) { 737 if (env->ExceptionCheck() == JNI_FALSE) { 738 env->FatalError("Expected exception"); 739 } 740} 741 742// Note for capabilities functions: 743// We assume the calls are rare enough that it does not make sense to cache class objects. The 744// advantage is lower maintenance burden. 745 746static bool ReadStructCapUserHeader( 747 JNIEnv* env, jobject java_header, __user_cap_header_struct* c_header) { 748 if (java_header == nullptr) { 749 jniThrowNullPointerException(env, "header is null"); 750 return false; 751 } 752 753 ScopedLocalRef<jclass> header_class(env, env->FindClass("android/system/StructCapUserHeader")); 754 if (header_class.get() == nullptr) { 755 return false; 756 } 757 758 { 759 static jfieldID version_fid = env->GetFieldID(header_class.get(), "version", "I"); 760 if (version_fid == nullptr) { 761 return false; 762 } 763 c_header->version = env->GetIntField(java_header, version_fid); 764 } 765 766 { 767 static jfieldID pid_fid = env->GetFieldID(header_class.get(), "pid", "I"); 768 if (pid_fid == nullptr) { 769 return false; 770 } 771 c_header->pid = env->GetIntField(java_header, pid_fid); 772 } 773 774 return true; 775} 776 777static void SetStructCapUserHeaderVersion( 778 JNIEnv* env, jobject java_header, __user_cap_header_struct* c_header) { 779 ScopedLocalRef<jclass> header_class(env, env->FindClass("android/system/StructCapUserHeader")); 780 if (header_class.get() == nullptr) { 781 env->ExceptionClear(); 782 return; 783 } 784 785 static jfieldID version_fid = env->GetFieldID(header_class.get(), "version", "I"); 786 if (version_fid == nullptr) { 787 env->ExceptionClear(); 788 return; 789 } 790 env->SetIntField(java_header, version_fid, c_header->version); 791} 792 793static jobject CreateStructCapUserData( 794 JNIEnv* env, jclass data_class, __user_cap_data_struct* c_data) { 795 if (c_data == nullptr) { 796 // Should not happen. 797 jniThrowNullPointerException(env, "data is null"); 798 return nullptr; 799 } 800 801 static jmethodID data_cons = env->GetMethodID(data_class, "<init>", "(III)V"); 802 if (data_cons == nullptr) { 803 return nullptr; 804 } 805 806 jint e = static_cast<jint>(c_data->effective); 807 jint p = static_cast<jint>(c_data->permitted); 808 jint i = static_cast<jint>(c_data->inheritable); 809 return env->NewObject(data_class, data_cons, e, p, i); 810} 811 812static bool ReadStructCapUserData(JNIEnv* env, jobject java_data, __user_cap_data_struct* c_data) { 813 if (java_data == nullptr) { 814 jniThrowNullPointerException(env, "data is null"); 815 return false; 816 } 817 818 ScopedLocalRef<jclass> data_class(env, env->FindClass("android/system/StructCapUserData")); 819 if (data_class.get() == nullptr) { 820 return false; 821 } 822 823 { 824 static jfieldID effective_fid = env->GetFieldID(data_class.get(), "effective", "I"); 825 if (effective_fid == nullptr) { 826 return false; 827 } 828 c_data->effective = env->GetIntField(java_data, effective_fid); 829 } 830 831 { 832 static jfieldID permitted_fid = env->GetFieldID(data_class.get(), "permitted", "I"); 833 if (permitted_fid == nullptr) { 834 return false; 835 } 836 c_data->permitted = env->GetIntField(java_data, permitted_fid); 837 } 838 839 840 { 841 static jfieldID inheritable_fid = env->GetFieldID(data_class.get(), "inheritable", "I"); 842 if (inheritable_fid == nullptr) { 843 return false; 844 } 845 c_data->inheritable = env->GetIntField(java_data, inheritable_fid); 846 } 847 848 return true; 849} 850 851static constexpr size_t kMaxCapUserDataLength = 2U; 852#ifdef _LINUX_CAPABILITY_VERSION_1 853static_assert(kMaxCapUserDataLength >= _LINUX_CAPABILITY_U32S_1, "Length too small."); 854#endif 855#ifdef _LINUX_CAPABILITY_VERSION_2 856static_assert(kMaxCapUserDataLength >= _LINUX_CAPABILITY_U32S_2, "Length too small."); 857#endif 858#ifdef _LINUX_CAPABILITY_VERSION_3 859static_assert(kMaxCapUserDataLength >= _LINUX_CAPABILITY_U32S_3, "Length too small."); 860#endif 861#ifdef _LINUX_CAPABILITY_VERSION_4 862static_assert(false, "Unsupported capability version, please update."); 863#endif 864 865static size_t GetCapUserDataLength(uint32_t version) { 866#ifdef _LINUX_CAPABILITY_VERSION_1 867 if (version == _LINUX_CAPABILITY_VERSION_1) { 868 return _LINUX_CAPABILITY_U32S_1; 869 } 870#endif 871#ifdef _LINUX_CAPABILITY_VERSION_2 872 if (version == _LINUX_CAPABILITY_VERSION_2) { 873 return _LINUX_CAPABILITY_U32S_2; 874 } 875#endif 876#ifdef _LINUX_CAPABILITY_VERSION_3 877 if (version == _LINUX_CAPABILITY_VERSION_3) { 878 return _LINUX_CAPABILITY_U32S_3; 879 } 880#endif 881 return 0; 882} 883 884static jobject Linux_accept(JNIEnv* env, jobject, jobject javaFd, jobject javaSocketAddress) { 885 sockaddr_storage ss; 886 socklen_t sl = sizeof(ss); 887 memset(&ss, 0, sizeof(ss)); 888 sockaddr* peer = (javaSocketAddress != NULL) ? reinterpret_cast<sockaddr*>(&ss) : NULL; 889 socklen_t* peerLength = (javaSocketAddress != NULL) ? &sl : 0; 890 jint clientFd = NET_FAILURE_RETRY(env, int, accept, javaFd, peer, peerLength); 891 if (clientFd == -1 || !fillSocketAddress(env, javaSocketAddress, ss, *peerLength)) { 892 close(clientFd); 893 return NULL; 894 } 895 return (clientFd != -1) ? jniCreateFileDescriptor(env, clientFd) : NULL; 896} 897 898static jboolean Linux_access(JNIEnv* env, jobject, jstring javaPath, jint mode) { 899 ScopedUtfChars path(env, javaPath); 900 if (path.c_str() == NULL) { 901 return JNI_FALSE; 902 } 903 int rc = TEMP_FAILURE_RETRY(access(path.c_str(), mode)); 904 if (rc == -1) { 905 throwErrnoException(env, "access"); 906 } 907 return (rc == 0); 908} 909 910static void Linux_bind(JNIEnv* env, jobject, jobject javaFd, jobject javaAddress, jint port) { 911 // We don't need the return value because we'll already have thrown. 912 (void) NET_IPV4_FALLBACK(env, int, bind, javaFd, javaAddress, port, NULL_ADDR_FORBIDDEN); 913} 914 915static void Linux_bindSocketAddress( 916 JNIEnv* env, jobject, jobject javaFd, jobject javaSocketAddress) { 917 sockaddr_storage ss; 918 socklen_t sa_len; 919 if (!javaSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len)) { 920 return; // Exception already thrown. 921 } 922 923 const sockaddr* sa = reinterpret_cast<const sockaddr*>(&ss); 924 // We don't need the return value because we'll already have thrown. 925 (void) NET_FAILURE_RETRY(env, int, bind, javaFd, sa, sa_len); 926} 927 928static jobjectArray Linux_capget(JNIEnv* env, jobject, jobject header) { 929 // Convert Java header struct to kernel datastructure. 930 __user_cap_header_struct cap_header; 931 if (!ReadStructCapUserHeader(env, header, &cap_header)) { 932 AssertException(env); 933 return nullptr; 934 } 935 936 // Call capget. 937 __user_cap_data_struct cap_data[kMaxCapUserDataLength]; 938 if (capget(&cap_header, &cap_data[0]) == -1) { 939 // Check for EINVAL. In that case, mutate the header. 940 if (errno == EINVAL) { 941 int saved_errno = errno; 942 SetStructCapUserHeaderVersion(env, header, &cap_header); 943 errno = saved_errno; 944 } 945 throwErrnoException(env, "capget"); 946 return nullptr; 947 } 948 949 // Create the result array. 950 ScopedLocalRef<jclass> data_class(env, env->FindClass("android/system/StructCapUserData")); 951 if (data_class.get() == nullptr) { 952 return nullptr; 953 } 954 size_t result_size = GetCapUserDataLength(cap_header.version); 955 ScopedLocalRef<jobjectArray> result( 956 env, env->NewObjectArray(result_size, data_class.get(), nullptr)); 957 if (result.get() == nullptr) { 958 return nullptr; 959 } 960 // Translate the values we got. 961 for (size_t i = 0; i < result_size; ++i) { 962 ScopedLocalRef<jobject> value( 963 env, CreateStructCapUserData(env, data_class.get(), &cap_data[i])); 964 if (value.get() == nullptr) { 965 AssertException(env); 966 return nullptr; 967 } 968 env->SetObjectArrayElement(result.get(), i, value.get()); 969 } 970 return result.release(); 971} 972 973static void Linux_capset( 974 JNIEnv* env, jobject, jobject header, jobjectArray data) { 975 // Convert Java header struct to kernel datastructure. 976 __user_cap_header_struct cap_header; 977 if (!ReadStructCapUserHeader(env, header, &cap_header)) { 978 AssertException(env); 979 return; 980 } 981 size_t result_size = GetCapUserDataLength(cap_header.version); 982 // Ensure that the array has the expected length. 983 if (env->GetArrayLength(data) != static_cast<jint>(result_size)) { 984 jniThrowExceptionFmt(env, 985 "java/lang/IllegalArgumentException", 986 "Unsupported input length %d (expected %zu)", 987 env->GetArrayLength(data), 988 result_size); 989 return; 990 } 991 992 __user_cap_data_struct cap_data[kMaxCapUserDataLength]; 993 // Translate the values we got. 994 for (size_t i = 0; i < result_size; ++i) { 995 ScopedLocalRef<jobject> value(env, env->GetObjectArrayElement(data, i)); 996 if (!ReadStructCapUserData(env, value.get(), &cap_data[i])) { 997 AssertException(env); 998 return; 999 } 1000 } 1001 1002 throwIfMinusOne(env, "capset", capset(&cap_header, &cap_data[0])); 1003} 1004 1005static void Linux_chmod(JNIEnv* env, jobject, jstring javaPath, jint mode) { 1006 ScopedUtfChars path(env, javaPath); 1007 if (path.c_str() == NULL) { 1008 return; 1009 } 1010 throwIfMinusOne(env, "chmod", TEMP_FAILURE_RETRY(chmod(path.c_str(), mode))); 1011} 1012 1013static void Linux_chown(JNIEnv* env, jobject, jstring javaPath, jint uid, jint gid) { 1014 ScopedUtfChars path(env, javaPath); 1015 if (path.c_str() == NULL) { 1016 return; 1017 } 1018 throwIfMinusOne(env, "chown", TEMP_FAILURE_RETRY(chown(path.c_str(), uid, gid))); 1019} 1020 1021static void Linux_close(JNIEnv* env, jobject, jobject javaFd) { 1022 // Get the FileDescriptor's 'fd' field and clear it. 1023 // We need to do this before we can throw an IOException (http://b/3222087). 1024 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1025 jniSetFileDescriptorOfFD(env, javaFd, -1); 1026 1027 // Even if close(2) fails with EINTR, the fd will have been closed. 1028 // Using TEMP_FAILURE_RETRY will either lead to EBADF or closing someone else's fd. 1029 // http://lkml.indiana.edu/hypermail/linux/kernel/0509.1/0877.html 1030 throwIfMinusOne(env, "close", close(fd)); 1031} 1032 1033static void Linux_connect(JNIEnv* env, jobject, jobject javaFd, jobject javaAddress, jint port) { 1034 (void) NET_IPV4_FALLBACK(env, int, connect, javaFd, javaAddress, port, NULL_ADDR_FORBIDDEN); 1035} 1036 1037static void Linux_connectSocketAddress( 1038 JNIEnv* env, jobject, jobject javaFd, jobject javaSocketAddress) { 1039 sockaddr_storage ss; 1040 socklen_t sa_len; 1041 if (!javaSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len)) { 1042 return; // Exception already thrown. 1043 } 1044 1045 const sockaddr* sa = reinterpret_cast<const sockaddr*>(&ss); 1046 // We don't need the return value because we'll already have thrown. 1047 (void) NET_FAILURE_RETRY(env, int, connect, javaFd, sa, sa_len); 1048} 1049 1050static jobject Linux_dup(JNIEnv* env, jobject, jobject javaOldFd) { 1051 int oldFd = jniGetFDFromFileDescriptor(env, javaOldFd); 1052 int newFd = throwIfMinusOne(env, "dup", TEMP_FAILURE_RETRY(dup(oldFd))); 1053 return (newFd != -1) ? jniCreateFileDescriptor(env, newFd) : NULL; 1054} 1055 1056static jobject Linux_dup2(JNIEnv* env, jobject, jobject javaOldFd, jint newFd) { 1057 int oldFd = jniGetFDFromFileDescriptor(env, javaOldFd); 1058 int fd = throwIfMinusOne(env, "dup2", TEMP_FAILURE_RETRY(dup2(oldFd, newFd))); 1059 return (fd != -1) ? jniCreateFileDescriptor(env, fd) : NULL; 1060} 1061 1062static jobjectArray Linux_environ(JNIEnv* env, jobject) { 1063 extern char** environ; // Standard, but not in any header file. 1064 return toStringArray(env, environ); 1065} 1066 1067static void Linux_execve(JNIEnv* env, jobject, jstring javaFilename, jobjectArray javaArgv, jobjectArray javaEnvp) { 1068 ScopedUtfChars path(env, javaFilename); 1069 if (path.c_str() == NULL) { 1070 return; 1071 } 1072 1073 ExecStrings argv(env, javaArgv); 1074 ExecStrings envp(env, javaEnvp); 1075 TEMP_FAILURE_RETRY(execve(path.c_str(), argv.get(), envp.get())); 1076 1077 throwErrnoException(env, "execve"); 1078} 1079 1080static void Linux_execv(JNIEnv* env, jobject, jstring javaFilename, jobjectArray javaArgv) { 1081 ScopedUtfChars path(env, javaFilename); 1082 if (path.c_str() == NULL) { 1083 return; 1084 } 1085 1086 ExecStrings argv(env, javaArgv); 1087 TEMP_FAILURE_RETRY(execv(path.c_str(), argv.get())); 1088 1089 throwErrnoException(env, "execv"); 1090} 1091 1092static void Linux_fchmod(JNIEnv* env, jobject, jobject javaFd, jint mode) { 1093 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1094 throwIfMinusOne(env, "fchmod", TEMP_FAILURE_RETRY(fchmod(fd, mode))); 1095} 1096 1097static void Linux_fchown(JNIEnv* env, jobject, jobject javaFd, jint uid, jint gid) { 1098 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1099 throwIfMinusOne(env, "fchown", TEMP_FAILURE_RETRY(fchown(fd, uid, gid))); 1100} 1101 1102static jint Linux_fcntlFlock(JNIEnv* env, jobject, jobject javaFd, jint cmd, jobject javaFlock) { 1103 static jfieldID typeFid = env->GetFieldID(JniConstants::structFlockClass, "l_type", "S"); 1104 static jfieldID whenceFid = env->GetFieldID(JniConstants::structFlockClass, "l_whence", "S"); 1105 static jfieldID startFid = env->GetFieldID(JniConstants::structFlockClass, "l_start", "J"); 1106 static jfieldID lenFid = env->GetFieldID(JniConstants::structFlockClass, "l_len", "J"); 1107 static jfieldID pidFid = env->GetFieldID(JniConstants::structFlockClass, "l_pid", "I"); 1108 1109 struct flock64 lock; 1110 memset(&lock, 0, sizeof(lock)); 1111 lock.l_type = env->GetShortField(javaFlock, typeFid); 1112 lock.l_whence = env->GetShortField(javaFlock, whenceFid); 1113 lock.l_start = env->GetLongField(javaFlock, startFid); 1114 lock.l_len = env->GetLongField(javaFlock, lenFid); 1115 lock.l_pid = env->GetIntField(javaFlock, pidFid); 1116 1117 int rc = IO_FAILURE_RETRY(env, int, fcntl, javaFd, cmd, &lock); 1118 if (rc != -1) { 1119 env->SetShortField(javaFlock, typeFid, lock.l_type); 1120 env->SetShortField(javaFlock, whenceFid, lock.l_whence); 1121 env->SetLongField(javaFlock, startFid, lock.l_start); 1122 env->SetLongField(javaFlock, lenFid, lock.l_len); 1123 env->SetIntField(javaFlock, pidFid, lock.l_pid); 1124 } 1125 return rc; 1126} 1127 1128static jint Linux_fcntlInt(JNIEnv* env, jobject, jobject javaFd, jint cmd, jint arg) { 1129 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1130 return throwIfMinusOne(env, "fcntl", TEMP_FAILURE_RETRY(fcntl(fd, cmd, arg))); 1131} 1132 1133static jint Linux_fcntlVoid(JNIEnv* env, jobject, jobject javaFd, jint cmd) { 1134 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1135 return throwIfMinusOne(env, "fcntl", TEMP_FAILURE_RETRY(fcntl(fd, cmd))); 1136} 1137 1138static void Linux_fdatasync(JNIEnv* env, jobject, jobject javaFd) { 1139 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1140 throwIfMinusOne(env, "fdatasync", TEMP_FAILURE_RETRY(fdatasync(fd))); 1141} 1142 1143static jobject Linux_fstat(JNIEnv* env, jobject, jobject javaFd) { 1144 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1145 struct stat64 sb; 1146 int rc = TEMP_FAILURE_RETRY(fstat64(fd, &sb)); 1147 if (rc == -1) { 1148 throwErrnoException(env, "fstat"); 1149 return NULL; 1150 } 1151 return makeStructStat(env, sb); 1152} 1153 1154static jobject Linux_fstatvfs(JNIEnv* env, jobject, jobject javaFd) { 1155 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1156 struct statvfs sb; 1157 int rc = TEMP_FAILURE_RETRY(fstatvfs(fd, &sb)); 1158 if (rc == -1) { 1159 throwErrnoException(env, "fstatvfs"); 1160 return NULL; 1161 } 1162 return makeStructStatVfs(env, sb); 1163} 1164 1165static void Linux_fsync(JNIEnv* env, jobject, jobject javaFd) { 1166 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1167 throwIfMinusOne(env, "fsync", TEMP_FAILURE_RETRY(fsync(fd))); 1168} 1169 1170static void Linux_ftruncate(JNIEnv* env, jobject, jobject javaFd, jlong length) { 1171 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1172 throwIfMinusOne(env, "ftruncate", TEMP_FAILURE_RETRY(ftruncate64(fd, length))); 1173} 1174 1175static jstring Linux_gai_strerror(JNIEnv* env, jobject, jint error) { 1176 return env->NewStringUTF(gai_strerror(error)); 1177} 1178 1179static jobjectArray Linux_android_getaddrinfo(JNIEnv* env, jobject, jstring javaNode, 1180 jobject javaHints, jint netId) { 1181 ScopedUtfChars node(env, javaNode); 1182 if (node.c_str() == NULL) { 1183 return NULL; 1184 } 1185 1186 static jfieldID flagsFid = env->GetFieldID(JniConstants::structAddrinfoClass, "ai_flags", "I"); 1187 static jfieldID familyFid = env->GetFieldID(JniConstants::structAddrinfoClass, "ai_family", "I"); 1188 static jfieldID socktypeFid = env->GetFieldID(JniConstants::structAddrinfoClass, "ai_socktype", "I"); 1189 static jfieldID protocolFid = env->GetFieldID(JniConstants::structAddrinfoClass, "ai_protocol", "I"); 1190 1191 addrinfo hints; 1192 memset(&hints, 0, sizeof(hints)); 1193 hints.ai_flags = env->GetIntField(javaHints, flagsFid); 1194 hints.ai_family = env->GetIntField(javaHints, familyFid); 1195 hints.ai_socktype = env->GetIntField(javaHints, socktypeFid); 1196 hints.ai_protocol = env->GetIntField(javaHints, protocolFid); 1197 1198 addrinfo* addressList = NULL; 1199 errno = 0; 1200 int rc = android_getaddrinfofornet(node.c_str(), NULL, &hints, netId, 0, &addressList); 1201 std::unique_ptr<addrinfo, addrinfo_deleter> addressListDeleter(addressList); 1202 if (rc != 0) { 1203 throwGaiException(env, "android_getaddrinfo", rc); 1204 return NULL; 1205 } 1206 1207 // Count results so we know how to size the output array. 1208 int addressCount = 0; 1209 for (addrinfo* ai = addressList; ai != NULL; ai = ai->ai_next) { 1210 if (ai->ai_family == AF_INET || ai->ai_family == AF_INET6) { 1211 ++addressCount; 1212 } else { 1213 ALOGE("android_getaddrinfo unexpected ai_family %i", ai->ai_family); 1214 } 1215 } 1216 if (addressCount == 0) { 1217 return NULL; 1218 } 1219 1220 // Prepare output array. 1221 jobjectArray result = env->NewObjectArray(addressCount, JniConstants::inetAddressClass, NULL); 1222 if (result == NULL) { 1223 return NULL; 1224 } 1225 1226 // Examine returned addresses one by one, save them in the output array. 1227 int index = 0; 1228 for (addrinfo* ai = addressList; ai != NULL; ai = ai->ai_next) { 1229 if (ai->ai_family != AF_INET && ai->ai_family != AF_INET6) { 1230 // Unknown address family. Skip this address. 1231 ALOGE("android_getaddrinfo unexpected ai_family %i", ai->ai_family); 1232 continue; 1233 } 1234 1235 // Convert each IP address into a Java byte array. 1236 sockaddr_storage& address = *reinterpret_cast<sockaddr_storage*>(ai->ai_addr); 1237 ScopedLocalRef<jobject> inetAddress(env, sockaddrToInetAddress(env, address, NULL)); 1238 if (inetAddress.get() == NULL) { 1239 return NULL; 1240 } 1241 env->SetObjectArrayElement(result, index, inetAddress.get()); 1242 ++index; 1243 } 1244 return result; 1245} 1246 1247static jint Linux_getegid(JNIEnv*, jobject) { 1248 return getegid(); 1249} 1250 1251static jint Linux_geteuid(JNIEnv*, jobject) { 1252 return geteuid(); 1253} 1254 1255static jint Linux_getgid(JNIEnv*, jobject) { 1256 return getgid(); 1257} 1258 1259static jstring Linux_getenv(JNIEnv* env, jobject, jstring javaName) { 1260 ScopedUtfChars name(env, javaName); 1261 if (name.c_str() == NULL) { 1262 return NULL; 1263 } 1264 return env->NewStringUTF(getenv(name.c_str())); 1265} 1266 1267static jstring Linux_getnameinfo(JNIEnv* env, jobject, jobject javaAddress, jint flags) { 1268 sockaddr_storage ss; 1269 socklen_t sa_len; 1270 if (!inetAddressToSockaddrVerbatim(env, javaAddress, 0, ss, sa_len)) { 1271 return NULL; 1272 } 1273 char buf[NI_MAXHOST]; // NI_MAXHOST is longer than INET6_ADDRSTRLEN. 1274 errno = 0; 1275 int rc = getnameinfo(reinterpret_cast<sockaddr*>(&ss), sa_len, buf, sizeof(buf), NULL, 0, flags); 1276 if (rc != 0) { 1277 throwGaiException(env, "getnameinfo", rc); 1278 return NULL; 1279 } 1280 return env->NewStringUTF(buf); 1281} 1282 1283static jobject Linux_getpeername(JNIEnv* env, jobject, jobject javaFd) { 1284 return doGetSockName(env, javaFd, false); 1285} 1286 1287static jint Linux_getpgid(JNIEnv* env, jobject, jint pid) { 1288 return throwIfMinusOne(env, "getpgid", TEMP_FAILURE_RETRY(getpgid(pid))); 1289} 1290 1291static jint Linux_getpid(JNIEnv*, jobject) { 1292 return TEMP_FAILURE_RETRY(getpid()); 1293} 1294 1295static jint Linux_getppid(JNIEnv*, jobject) { 1296 return TEMP_FAILURE_RETRY(getppid()); 1297} 1298 1299static jobject Linux_getpwnam(JNIEnv* env, jobject, jstring javaName) { 1300 ScopedUtfChars name(env, javaName); 1301 if (name.c_str() == NULL) { 1302 return NULL; 1303 } 1304 return Passwd(env).getpwnam(name.c_str()); 1305} 1306 1307static jobject Linux_getpwuid(JNIEnv* env, jobject, jint uid) { 1308 return Passwd(env).getpwuid(uid); 1309} 1310 1311static jobject Linux_getsockname(JNIEnv* env, jobject, jobject javaFd) { 1312 return doGetSockName(env, javaFd, true); 1313} 1314 1315static jint Linux_getsockoptByte(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 1316 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1317 u_char result = 0; 1318 socklen_t size = sizeof(result); 1319 throwIfMinusOne(env, "getsockopt", TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &result, &size))); 1320 return result; 1321} 1322 1323static jobject Linux_getsockoptInAddr(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 1324 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1325 sockaddr_storage ss; 1326 memset(&ss, 0, sizeof(ss)); 1327 ss.ss_family = AF_INET; // This is only for the IPv4-only IP_MULTICAST_IF. 1328 sockaddr_in* sa = reinterpret_cast<sockaddr_in*>(&ss); 1329 socklen_t size = sizeof(sa->sin_addr); 1330 int rc = TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &sa->sin_addr, &size)); 1331 if (rc == -1) { 1332 throwErrnoException(env, "getsockopt"); 1333 return NULL; 1334 } 1335 return sockaddrToInetAddress(env, ss, NULL); 1336} 1337 1338static jint Linux_getsockoptInt(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 1339 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1340 jint result = 0; 1341 socklen_t size = sizeof(result); 1342 throwIfMinusOne(env, "getsockopt", TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &result, &size))); 1343 return result; 1344} 1345 1346static jobject Linux_getsockoptLinger(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 1347 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1348 struct linger l; 1349 socklen_t size = sizeof(l); 1350 memset(&l, 0, size); 1351 int rc = TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &l, &size)); 1352 if (rc == -1) { 1353 throwErrnoException(env, "getsockopt"); 1354 return NULL; 1355 } 1356 return makeStructLinger(env, l); 1357} 1358 1359static jobject Linux_getsockoptTimeval(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 1360 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1361 struct timeval tv; 1362 socklen_t size = sizeof(tv); 1363 memset(&tv, 0, size); 1364 int rc = TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &tv, &size)); 1365 if (rc == -1) { 1366 throwErrnoException(env, "getsockopt"); 1367 return NULL; 1368 } 1369 return makeStructTimeval(env, tv); 1370} 1371 1372static jobject Linux_getsockoptUcred(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 1373 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1374 struct ucred u; 1375 socklen_t size = sizeof(u); 1376 memset(&u, 0, size); 1377 int rc = TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &u, &size)); 1378 if (rc == -1) { 1379 throwErrnoException(env, "getsockopt"); 1380 return NULL; 1381 } 1382 return makeStructUcred(env, u); 1383} 1384 1385static jint Linux_gettid(JNIEnv* env __unused, jobject) { 1386#if defined(__BIONIC__) 1387 return TEMP_FAILURE_RETRY(gettid()); 1388#else 1389 return syscall(__NR_gettid); 1390#endif 1391} 1392 1393static jint Linux_getuid(JNIEnv*, jobject) { 1394 return getuid(); 1395} 1396 1397static jbyteArray Linux_getxattr(JNIEnv* env, jobject, jstring javaPath, 1398 jstring javaName) { 1399 ScopedUtfChars path(env, javaPath); 1400 if (path.c_str() == NULL) { 1401 return NULL; 1402 } 1403 ScopedUtfChars name(env, javaName); 1404 if (name.c_str() == NULL) { 1405 return NULL; 1406 } 1407 1408 while (true) { 1409 // Get the current size of the named extended attribute. 1410 ssize_t valueLength; 1411 if ((valueLength = getxattr(path.c_str(), name.c_str(), NULL, 0)) < 0) { 1412 throwErrnoException(env, "getxattr"); 1413 return NULL; 1414 } 1415 1416 // Create the actual byte array. 1417 std::vector<char> buf(valueLength); 1418 if ((valueLength = getxattr(path.c_str(), name.c_str(), buf.data(), valueLength)) < 0) { 1419 if (errno == ERANGE) { 1420 // The attribute value has changed since last getxattr call and buf no longer fits, 1421 // try again. 1422 continue; 1423 } 1424 throwErrnoException(env, "getxattr"); 1425 return NULL; 1426 } 1427 jbyteArray array = env->NewByteArray(valueLength); 1428 if (array == NULL) { 1429 return NULL; 1430 } 1431 env->SetByteArrayRegion(array, 0, valueLength, reinterpret_cast<const jbyte*>(buf.data())); 1432 return array; 1433 } 1434} 1435 1436static jobjectArray Linux_getifaddrs(JNIEnv* env, jobject) { 1437 static jmethodID ctor = env->GetMethodID(JniConstants::structIfaddrs, "<init>", 1438 "(Ljava/lang/String;ILjava/net/InetAddress;Ljava/net/InetAddress;Ljava/net/InetAddress;[B)V"); 1439 1440 ifaddrs* ifaddr; 1441 int rc = TEMP_FAILURE_RETRY(getifaddrs(&ifaddr)); 1442 if (rc == -1) { 1443 throwErrnoException(env, "getifaddrs"); 1444 return NULL; 1445 } 1446 std::unique_ptr<ifaddrs, decltype(&freeifaddrs)> ifaddrPtr(ifaddr, freeifaddrs); 1447 1448 // Count results so we know how to size the output array. 1449 jint ifCount = 0; 1450 for (ifaddrs* ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) { 1451 ++ifCount; 1452 } 1453 1454 // Prepare output array. 1455 jobjectArray result = env->NewObjectArray(ifCount, JniConstants::structIfaddrs, NULL); 1456 if (result == NULL) { 1457 return NULL; 1458 } 1459 1460 // Traverse the list and populate the output array. 1461 int index = 0; 1462 for (ifaddrs* ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next, ++index) { 1463 TO_JAVA_STRING(name, ifa->ifa_name); 1464 jint flags = ifa->ifa_flags; 1465 sockaddr_storage* interfaceAddr = 1466 reinterpret_cast<sockaddr_storage*>(ifa->ifa_addr); 1467 sockaddr_storage* netmaskAddr = 1468 reinterpret_cast<sockaddr_storage*>(ifa->ifa_netmask); 1469 sockaddr_storage* broadAddr = 1470 reinterpret_cast<sockaddr_storage*>(ifa->ifa_broadaddr); 1471 1472 jobject addr, netmask, broad; 1473 jbyteArray hwaddr = NULL; 1474 if (interfaceAddr != NULL) { 1475 switch (interfaceAddr->ss_family) { 1476 case AF_INET: 1477 case AF_INET6: 1478 // IPv4 / IPv6. 1479 // interfaceAddr and netmaskAddr are never null. 1480 if ((addr = sockaddrToInetAddress(env, *interfaceAddr, NULL)) == NULL) { 1481 return NULL; 1482 } 1483 if ((netmask = sockaddrToInetAddress(env, *netmaskAddr, NULL)) == NULL) { 1484 return NULL; 1485 } 1486 if (broadAddr != NULL && (ifa->ifa_flags & IFF_BROADCAST)) { 1487 if ((broad = sockaddrToInetAddress(env, *broadAddr, NULL)) == NULL) { 1488 return NULL; 1489 } 1490 } else { 1491 broad = NULL; 1492 } 1493 break; 1494 case AF_PACKET: 1495 // Raw Interface. 1496 sockaddr_ll* sll = reinterpret_cast<sockaddr_ll*>(ifa->ifa_addr); 1497 1498 bool allZero = true; 1499 for (int i = 0; i < sll->sll_halen; ++i) { 1500 if (sll->sll_addr[i] != 0) { 1501 allZero = false; 1502 break; 1503 } 1504 } 1505 1506 if (!allZero) { 1507 hwaddr = env->NewByteArray(sll->sll_halen); 1508 if (hwaddr == NULL) { 1509 return NULL; 1510 } 1511 env->SetByteArrayRegion(hwaddr, 0, sll->sll_halen, 1512 reinterpret_cast<const jbyte*>(sll->sll_addr)); 1513 } 1514 addr = netmask = broad = NULL; 1515 break; 1516 } 1517 } else { 1518 // Preserve the entry even if the interface has no interface address. 1519 // http://b/29243557/ 1520 addr = netmask = broad = NULL; 1521 } 1522 1523 jobject o = env->NewObject(JniConstants::structIfaddrs, ctor, name, flags, addr, netmask, 1524 broad, hwaddr); 1525 env->SetObjectArrayElement(result, index, o); 1526 } 1527 1528 return result; 1529} 1530 1531static jstring Linux_if_indextoname(JNIEnv* env, jobject, jint index) { 1532 char buf[IF_NAMESIZE]; 1533 char* name = if_indextoname(index, buf); 1534 // if_indextoname(3) returns NULL on failure, which will come out of NewStringUTF unscathed. 1535 // There's no useful information in errno, so we don't bother throwing. Callers can null-check. 1536 return env->NewStringUTF(name); 1537} 1538 1539static jint Linux_if_nametoindex(JNIEnv* env, jobject, jstring name) { 1540 ScopedUtfChars cname(env, name); 1541 if (cname.c_str() == NULL) { 1542 return 0; 1543 } 1544 1545 // There's no useful information in errno, so we don't bother throwing. Callers can zero-check. 1546 return if_nametoindex(cname.c_str()); 1547} 1548 1549static jobject Linux_inet_pton(JNIEnv* env, jobject, jint family, jstring javaName) { 1550 ScopedUtfChars name(env, javaName); 1551 if (name.c_str() == NULL) { 1552 return NULL; 1553 } 1554 sockaddr_storage ss; 1555 memset(&ss, 0, sizeof(ss)); 1556 // sockaddr_in and sockaddr_in6 are at the same address, so we can use either here. 1557 void* dst = &reinterpret_cast<sockaddr_in*>(&ss)->sin_addr; 1558 if (inet_pton(family, name.c_str(), dst) != 1) { 1559 return NULL; 1560 } 1561 ss.ss_family = family; 1562 return sockaddrToInetAddress(env, ss, NULL); 1563} 1564 1565static jint Linux_ioctlFlags(JNIEnv* env, jobject, jobject javaFd, jstring javaInterfaceName) { 1566 struct ifreq req; 1567 if (!fillIfreq(env, javaInterfaceName, req)) { 1568 return 0; 1569 } 1570 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1571 throwIfMinusOne(env, "ioctl", TEMP_FAILURE_RETRY(ioctl(fd, SIOCGIFFLAGS, &req))); 1572 return req.ifr_flags; 1573} 1574 1575static jobject Linux_ioctlInetAddress(JNIEnv* env, jobject, jobject javaFd, jint cmd, jstring javaInterfaceName) { 1576 struct ifreq req; 1577 if (!fillIfreq(env, javaInterfaceName, req)) { 1578 return NULL; 1579 } 1580 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1581 int rc = throwIfMinusOne(env, "ioctl", TEMP_FAILURE_RETRY(ioctl(fd, cmd, &req))); 1582 if (rc == -1) { 1583 return NULL; 1584 } 1585 return sockaddrToInetAddress(env, reinterpret_cast<sockaddr_storage&>(req.ifr_addr), NULL); 1586} 1587 1588static jint Linux_ioctlInt(JNIEnv* env, jobject, jobject javaFd, jint cmd, jobject javaArg) { 1589 // This is complicated because ioctls may return their result by updating their argument 1590 // or via their return value, so we need to support both. 1591 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1592 static jfieldID valueFid = env->GetFieldID(JniConstants::mutableIntClass, "value", "I"); 1593 jint arg = env->GetIntField(javaArg, valueFid); 1594 int rc = throwIfMinusOne(env, "ioctl", TEMP_FAILURE_RETRY(ioctl(fd, cmd, &arg))); 1595 if (!env->ExceptionCheck()) { 1596 env->SetIntField(javaArg, valueFid, arg); 1597 } 1598 return rc; 1599} 1600 1601static jint Linux_ioctlMTU(JNIEnv* env, jobject, jobject javaFd, jstring javaInterfaceName) { 1602 struct ifreq req; 1603 if (!fillIfreq(env, javaInterfaceName, req)) { 1604 return 0; 1605 } 1606 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1607 throwIfMinusOne(env, "ioctl", TEMP_FAILURE_RETRY(ioctl(fd, SIOCGIFMTU, &req))); 1608 return req.ifr_mtu; 1609} 1610 1611static jboolean Linux_isatty(JNIEnv* env, jobject, jobject javaFd) { 1612 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1613 return TEMP_FAILURE_RETRY(isatty(fd)) == 1; 1614} 1615 1616static void Linux_kill(JNIEnv* env, jobject, jint pid, jint sig) { 1617 throwIfMinusOne(env, "kill", TEMP_FAILURE_RETRY(kill(pid, sig))); 1618} 1619 1620static void Linux_lchown(JNIEnv* env, jobject, jstring javaPath, jint uid, jint gid) { 1621 ScopedUtfChars path(env, javaPath); 1622 if (path.c_str() == NULL) { 1623 return; 1624 } 1625 throwIfMinusOne(env, "lchown", TEMP_FAILURE_RETRY(lchown(path.c_str(), uid, gid))); 1626} 1627 1628static void Linux_link(JNIEnv* env, jobject, jstring javaOldPath, jstring javaNewPath) { 1629 ScopedUtfChars oldPath(env, javaOldPath); 1630 if (oldPath.c_str() == NULL) { 1631 return; 1632 } 1633 ScopedUtfChars newPath(env, javaNewPath); 1634 if (newPath.c_str() == NULL) { 1635 return; 1636 } 1637 throwIfMinusOne(env, "link", TEMP_FAILURE_RETRY(link(oldPath.c_str(), newPath.c_str()))); 1638} 1639 1640static void Linux_listen(JNIEnv* env, jobject, jobject javaFd, jint backlog) { 1641 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1642 throwIfMinusOne(env, "listen", TEMP_FAILURE_RETRY(listen(fd, backlog))); 1643} 1644 1645static jobjectArray Linux_listxattr(JNIEnv* env, jobject, jstring javaPath) { 1646 ScopedUtfChars path(env, javaPath); 1647 if (path.c_str() == NULL) { 1648 return NULL; 1649 } 1650 1651 while (true) { 1652 // Get the current size of the named extended attribute. 1653 ssize_t valueLength; 1654 if ((valueLength = listxattr(path.c_str(), NULL, 0)) < 0) { 1655 throwErrnoException(env, "listxattr"); 1656 return NULL; 1657 } 1658 1659 // Create the actual byte array. 1660 std::string buf(valueLength, '\0'); 1661 if ((valueLength = listxattr(path.c_str(), &buf[0], valueLength)) < 0) { 1662 if (errno == ERANGE) { 1663 // The attribute value has changed since last listxattr call and buf no longer fits, 1664 // try again. 1665 continue; 1666 } 1667 throwErrnoException(env, "listxattr"); 1668 return NULL; 1669 } 1670 1671 // Split the output by '\0'. 1672 buf.resize(valueLength > 0 ? valueLength - 1 : 0); // Remove the trailing NULL character. 1673 std::string delim("\0", 1); 1674 auto xattrs = android::base::Split(buf, delim); 1675 1676 return toStringArray(env, xattrs); 1677 } 1678} 1679 1680static jlong Linux_lseek(JNIEnv* env, jobject, jobject javaFd, jlong offset, jint whence) { 1681 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1682 return throwIfMinusOne(env, "lseek", TEMP_FAILURE_RETRY(lseek64(fd, offset, whence))); 1683} 1684 1685static jobject Linux_lstat(JNIEnv* env, jobject, jstring javaPath) { 1686 return doStat(env, javaPath, true); 1687} 1688 1689static void Linux_mincore(JNIEnv* env, jobject, jlong address, jlong byteCount, jbyteArray javaVector) { 1690 ScopedByteArrayRW vector(env, javaVector); 1691 if (vector.get() == NULL) { 1692 return; 1693 } 1694 void* ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1695 unsigned char* vec = reinterpret_cast<unsigned char*>(vector.get()); 1696 throwIfMinusOne(env, "mincore", TEMP_FAILURE_RETRY(mincore(ptr, byteCount, vec))); 1697} 1698 1699static void Linux_mkdir(JNIEnv* env, jobject, jstring javaPath, jint mode) { 1700 ScopedUtfChars path(env, javaPath); 1701 if (path.c_str() == NULL) { 1702 return; 1703 } 1704 throwIfMinusOne(env, "mkdir", TEMP_FAILURE_RETRY(mkdir(path.c_str(), mode))); 1705} 1706 1707static void Linux_mkfifo(JNIEnv* env, jobject, jstring javaPath, jint mode) { 1708 ScopedUtfChars path(env, javaPath); 1709 if (path.c_str() == NULL) { 1710 return; 1711 } 1712 throwIfMinusOne(env, "mkfifo", TEMP_FAILURE_RETRY(mkfifo(path.c_str(), mode))); 1713} 1714 1715static void Linux_mlock(JNIEnv* env, jobject, jlong address, jlong byteCount) { 1716 void* ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1717 throwIfMinusOne(env, "mlock", TEMP_FAILURE_RETRY(mlock(ptr, byteCount))); 1718} 1719 1720static jlong Linux_mmap(JNIEnv* env, jobject, jlong address, jlong byteCount, jint prot, jint flags, jobject javaFd, jlong offset) { 1721 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1722 void* suggestedPtr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1723 void* ptr = mmap64(suggestedPtr, byteCount, prot, flags, fd, offset); 1724 if (ptr == MAP_FAILED) { 1725 throwErrnoException(env, "mmap"); 1726 } 1727 return static_cast<jlong>(reinterpret_cast<uintptr_t>(ptr)); 1728} 1729 1730static void Linux_msync(JNIEnv* env, jobject, jlong address, jlong byteCount, jint flags) { 1731 void* ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1732 throwIfMinusOne(env, "msync", TEMP_FAILURE_RETRY(msync(ptr, byteCount, flags))); 1733} 1734 1735static void Linux_munlock(JNIEnv* env, jobject, jlong address, jlong byteCount) { 1736 void* ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1737 throwIfMinusOne(env, "munlock", TEMP_FAILURE_RETRY(munlock(ptr, byteCount))); 1738} 1739 1740static void Linux_munmap(JNIEnv* env, jobject, jlong address, jlong byteCount) { 1741 void* ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1742 throwIfMinusOne(env, "munmap", TEMP_FAILURE_RETRY(munmap(ptr, byteCount))); 1743} 1744 1745static jobject Linux_open(JNIEnv* env, jobject, jstring javaPath, jint flags, jint mode) { 1746 ScopedUtfChars path(env, javaPath); 1747 if (path.c_str() == NULL) { 1748 return NULL; 1749 } 1750 int fd = throwIfMinusOne(env, "open", TEMP_FAILURE_RETRY(open(path.c_str(), flags, mode))); 1751 return fd != -1 ? jniCreateFileDescriptor(env, fd) : NULL; 1752} 1753 1754static jobjectArray Linux_pipe2(JNIEnv* env, jobject, jint flags __unused) { 1755 int fds[2]; 1756 throwIfMinusOne(env, "pipe2", TEMP_FAILURE_RETRY(pipe2(&fds[0], flags))); 1757 jobjectArray result = env->NewObjectArray(2, JniConstants::fileDescriptorClass, NULL); 1758 if (result == NULL) { 1759 return NULL; 1760 } 1761 for (int i = 0; i < 2; ++i) { 1762 ScopedLocalRef<jobject> fd(env, jniCreateFileDescriptor(env, fds[i])); 1763 if (fd.get() == NULL) { 1764 return NULL; 1765 } 1766 env->SetObjectArrayElement(result, i, fd.get()); 1767 if (env->ExceptionCheck()) { 1768 return NULL; 1769 } 1770 } 1771 return result; 1772} 1773 1774static jint Linux_poll(JNIEnv* env, jobject, jobjectArray javaStructs, jint timeoutMs) { 1775 static jfieldID fdFid = env->GetFieldID(JniConstants::structPollfdClass, "fd", "Ljava/io/FileDescriptor;"); 1776 static jfieldID eventsFid = env->GetFieldID(JniConstants::structPollfdClass, "events", "S"); 1777 static jfieldID reventsFid = env->GetFieldID(JniConstants::structPollfdClass, "revents", "S"); 1778 1779 // Turn the Java android.system.StructPollfd[] into a C++ struct pollfd[]. 1780 size_t arrayLength = env->GetArrayLength(javaStructs); 1781 std::unique_ptr<struct pollfd[]> fds(new struct pollfd[arrayLength]); 1782 memset(fds.get(), 0, sizeof(struct pollfd) * arrayLength); 1783 size_t count = 0; // Some trailing array elements may be irrelevant. (See below.) 1784 for (size_t i = 0; i < arrayLength; ++i) { 1785 ScopedLocalRef<jobject> javaStruct(env, env->GetObjectArrayElement(javaStructs, i)); 1786 if (javaStruct.get() == NULL) { 1787 break; // We allow trailing nulls in the array for caller convenience. 1788 } 1789 ScopedLocalRef<jobject> javaFd(env, env->GetObjectField(javaStruct.get(), fdFid)); 1790 if (javaFd.get() == NULL) { 1791 break; // We also allow callers to just clear the fd field (this is what Selector does). 1792 } 1793 fds[count].fd = jniGetFDFromFileDescriptor(env, javaFd.get()); 1794 fds[count].events = env->GetShortField(javaStruct.get(), eventsFid); 1795 ++count; 1796 } 1797 1798 std::vector<AsynchronousCloseMonitor*> monitors; 1799 for (size_t i = 0; i < count; ++i) { 1800 monitors.push_back(new AsynchronousCloseMonitor(fds[i].fd)); 1801 } 1802 1803 int rc; 1804 while (true) { 1805 timespec before; 1806 clock_gettime(CLOCK_MONOTONIC, &before); 1807 1808 rc = poll(fds.get(), count, timeoutMs); 1809 if (rc >= 0 || errno != EINTR) { 1810 break; 1811 } 1812 1813 // We got EINTR. Work out how much of the original timeout is still left. 1814 if (timeoutMs > 0) { 1815 timespec now; 1816 clock_gettime(CLOCK_MONOTONIC, &now); 1817 1818 timespec diff; 1819 diff.tv_sec = now.tv_sec - before.tv_sec; 1820 diff.tv_nsec = now.tv_nsec - before.tv_nsec; 1821 if (diff.tv_nsec < 0) { 1822 --diff.tv_sec; 1823 diff.tv_nsec += 1000000000; 1824 } 1825 1826 jint diffMs = diff.tv_sec * 1000 + diff.tv_nsec / 1000000; 1827 if (diffMs >= timeoutMs) { 1828 rc = 0; // We have less than 1ms left anyway, so just time out. 1829 break; 1830 } 1831 1832 timeoutMs -= diffMs; 1833 } 1834 } 1835 1836 for (size_t i = 0; i < monitors.size(); ++i) { 1837 delete monitors[i]; 1838 } 1839 if (rc == -1) { 1840 throwErrnoException(env, "poll"); 1841 return -1; 1842 } 1843 1844 // Update the revents fields in the Java android.system.StructPollfd[]. 1845 for (size_t i = 0; i < count; ++i) { 1846 ScopedLocalRef<jobject> javaStruct(env, env->GetObjectArrayElement(javaStructs, i)); 1847 if (javaStruct.get() == NULL) { 1848 return -1; 1849 } 1850 env->SetShortField(javaStruct.get(), reventsFid, fds[i].revents); 1851 } 1852 return rc; 1853} 1854 1855static void Linux_posix_fallocate(JNIEnv* env, jobject, jobject javaFd __unused, 1856 jlong offset __unused, jlong length __unused) { 1857 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1858 while ((errno = posix_fallocate64(fd, offset, length)) == EINTR) { 1859 } 1860 if (errno != 0) { 1861 throwErrnoException(env, "posix_fallocate"); 1862 } 1863} 1864 1865static jint Linux_prctl(JNIEnv* env, jobject, jint option __unused, jlong arg2 __unused, 1866 jlong arg3 __unused, jlong arg4 __unused, jlong arg5 __unused) { 1867 int result = TEMP_FAILURE_RETRY(prctl(static_cast<int>(option), 1868 static_cast<unsigned long>(arg2), 1869 static_cast<unsigned long>(arg3), 1870 static_cast<unsigned long>(arg4), 1871 static_cast<unsigned long>(arg5))); 1872 return throwIfMinusOne(env, "prctl", result); 1873} 1874 1875static jint Linux_preadBytes(JNIEnv* env, jobject, jobject javaFd, jobject javaBytes, jint byteOffset, jint byteCount, jlong offset) { 1876 ScopedBytesRW bytes(env, javaBytes); 1877 if (bytes.get() == NULL) { 1878 return -1; 1879 } 1880 return IO_FAILURE_RETRY(env, ssize_t, pread64, javaFd, bytes.get() + byteOffset, byteCount, offset); 1881} 1882 1883static jint Linux_pwriteBytes(JNIEnv* env, jobject, jobject javaFd, jbyteArray javaBytes, jint byteOffset, jint byteCount, jlong offset) { 1884 ScopedBytesRO bytes(env, javaBytes); 1885 if (bytes.get() == NULL) { 1886 return -1; 1887 } 1888 return IO_FAILURE_RETRY(env, ssize_t, pwrite64, javaFd, bytes.get() + byteOffset, byteCount, offset); 1889} 1890 1891static jint Linux_readBytes(JNIEnv* env, jobject, jobject javaFd, jobject javaBytes, jint byteOffset, jint byteCount) { 1892 ScopedBytesRW bytes(env, javaBytes); 1893 if (bytes.get() == NULL) { 1894 return -1; 1895 } 1896 return IO_FAILURE_RETRY(env, ssize_t, read, javaFd, bytes.get() + byteOffset, byteCount); 1897} 1898 1899static jstring Linux_readlink(JNIEnv* env, jobject, jstring javaPath) { 1900 ScopedUtfChars path(env, javaPath); 1901 if (path.c_str() == NULL) { 1902 return NULL; 1903 } 1904 1905 std::string result; 1906 if (!android::base::Readlink(path.c_str(), &result)) { 1907 throwErrnoException(env, "readlink"); 1908 return NULL; 1909 } 1910 return env->NewStringUTF(result.c_str()); 1911} 1912 1913static jstring Linux_realpath(JNIEnv* env, jobject, jstring javaPath) { 1914 ScopedUtfChars path(env, javaPath); 1915 if (path.c_str() == NULL) { 1916 return NULL; 1917 } 1918 1919 std::unique_ptr<char, c_deleter> real_path(realpath(path.c_str(), nullptr)); 1920 if (real_path.get() == nullptr) { 1921 throwErrnoException(env, "realpath"); 1922 return NULL; 1923 } 1924 1925 return env->NewStringUTF(real_path.get()); 1926} 1927 1928static jint Linux_readv(JNIEnv* env, jobject, jobject javaFd, jobjectArray buffers, jintArray offsets, jintArray byteCounts) { 1929 IoVec<ScopedBytesRW> ioVec(env, env->GetArrayLength(buffers)); 1930 if (!ioVec.init(buffers, offsets, byteCounts)) { 1931 return -1; 1932 } 1933 return IO_FAILURE_RETRY(env, ssize_t, readv, javaFd, ioVec.get(), ioVec.size()); 1934} 1935 1936static jint Linux_recvfromBytes(JNIEnv* env, jobject, jobject javaFd, jobject javaBytes, jint byteOffset, jint byteCount, jint flags, jobject javaInetSocketAddress) { 1937 ScopedBytesRW bytes(env, javaBytes); 1938 if (bytes.get() == NULL) { 1939 return -1; 1940 } 1941 sockaddr_storage ss; 1942 socklen_t sl = sizeof(ss); 1943 memset(&ss, 0, sizeof(ss)); 1944 sockaddr* from = (javaInetSocketAddress != NULL) ? reinterpret_cast<sockaddr*>(&ss) : NULL; 1945 socklen_t* fromLength = (javaInetSocketAddress != NULL) ? &sl : 0; 1946 jint recvCount = NET_FAILURE_RETRY(env, ssize_t, recvfrom, javaFd, bytes.get() + byteOffset, byteCount, flags, from, fromLength); 1947 if (recvCount >= 0) { 1948 // The socket may have performed orderly shutdown and recvCount would return 0 (see man 2 1949 // recvfrom), in which case ss.ss_family == AF_UNIX and fillInetSocketAddress would fail. 1950 // Don't fill in the address if recvfrom didn't succeed. http://b/33483694 1951 if (ss.ss_family == AF_INET || ss.ss_family == AF_INET6) { 1952 fillInetSocketAddress(env, javaInetSocketAddress, ss); 1953 } 1954 } 1955 return recvCount; 1956} 1957 1958static void Linux_remove(JNIEnv* env, jobject, jstring javaPath) { 1959 ScopedUtfChars path(env, javaPath); 1960 if (path.c_str() == NULL) { 1961 return; 1962 } 1963 throwIfMinusOne(env, "remove", TEMP_FAILURE_RETRY(remove(path.c_str()))); 1964} 1965 1966static void Linux_removexattr(JNIEnv* env, jobject, jstring javaPath, jstring javaName) { 1967 ScopedUtfChars path(env, javaPath); 1968 if (path.c_str() == NULL) { 1969 return; 1970 } 1971 ScopedUtfChars name(env, javaName); 1972 if (name.c_str() == NULL) { 1973 return; 1974 } 1975 1976 int res = removexattr(path.c_str(), name.c_str()); 1977 if (res < 0) { 1978 throwErrnoException(env, "removexattr"); 1979 } 1980} 1981 1982static void Linux_rename(JNIEnv* env, jobject, jstring javaOldPath, jstring javaNewPath) { 1983 ScopedUtfChars oldPath(env, javaOldPath); 1984 if (oldPath.c_str() == NULL) { 1985 return; 1986 } 1987 ScopedUtfChars newPath(env, javaNewPath); 1988 if (newPath.c_str() == NULL) { 1989 return; 1990 } 1991 throwIfMinusOne(env, "rename", TEMP_FAILURE_RETRY(rename(oldPath.c_str(), newPath.c_str()))); 1992} 1993 1994static jlong Linux_sendfile(JNIEnv* env, jobject, jobject javaOutFd, jobject javaInFd, jobject javaOffset, jlong byteCount) { 1995 int outFd = jniGetFDFromFileDescriptor(env, javaOutFd); 1996 int inFd = jniGetFDFromFileDescriptor(env, javaInFd); 1997 static jfieldID valueFid = env->GetFieldID(JniConstants::mutableLongClass, "value", "J"); 1998 off_t offset = 0; 1999 off_t* offsetPtr = NULL; 2000 if (javaOffset != NULL) { 2001 // TODO: fix bionic so we can have a 64-bit off_t! 2002 offset = env->GetLongField(javaOffset, valueFid); 2003 offsetPtr = &offset; 2004 } 2005 jlong result = throwIfMinusOne(env, "sendfile", TEMP_FAILURE_RETRY(sendfile(outFd, inFd, offsetPtr, byteCount))); 2006 if (javaOffset != NULL) { 2007 env->SetLongField(javaOffset, valueFid, offset); 2008 } 2009 return result; 2010} 2011 2012static jint Linux_sendtoBytes(JNIEnv* env, jobject, jobject javaFd, jobject javaBytes, jint byteOffset, jint byteCount, jint flags, jobject javaInetAddress, jint port) { 2013 ScopedBytesRO bytes(env, javaBytes); 2014 if (bytes.get() == NULL) { 2015 return -1; 2016 } 2017 2018 return NET_IPV4_FALLBACK(env, ssize_t, sendto, javaFd, javaInetAddress, port, 2019 NULL_ADDR_OK, bytes.get() + byteOffset, byteCount, flags); 2020} 2021 2022static jint Linux_sendtoBytesSocketAddress(JNIEnv* env, jobject, jobject javaFd, jobject javaBytes, jint byteOffset, jint byteCount, jint flags, jobject javaSocketAddress) { 2023 if (env->IsInstanceOf(javaSocketAddress, JniConstants::inetSocketAddressClass)) { 2024 // Use the InetAddress version so we get the benefit of NET_IPV4_FALLBACK. 2025 jobject javaInetAddress; 2026 jint port; 2027 javaInetSocketAddressToInetAddressAndPort(env, javaSocketAddress, javaInetAddress, port); 2028 return Linux_sendtoBytes(env, NULL, javaFd, javaBytes, byteOffset, byteCount, flags, 2029 javaInetAddress, port); 2030 } 2031 2032 ScopedBytesRO bytes(env, javaBytes); 2033 if (bytes.get() == NULL) { 2034 return -1; 2035 } 2036 2037 sockaddr_storage ss; 2038 socklen_t sa_len; 2039 if (!javaSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len)) { 2040 return -1; 2041 } 2042 2043 const sockaddr* sa = reinterpret_cast<const sockaddr*>(&ss); 2044 // We don't need the return value because we'll already have thrown. 2045 return NET_FAILURE_RETRY(env, ssize_t, sendto, javaFd, bytes.get() + byteOffset, byteCount, flags, sa, sa_len); 2046} 2047 2048static void Linux_setegid(JNIEnv* env, jobject, jint egid) { 2049 throwIfMinusOne(env, "setegid", TEMP_FAILURE_RETRY(setegid(egid))); 2050} 2051 2052static void Linux_setenv(JNIEnv* env, jobject, jstring javaName, jstring javaValue, jboolean overwrite) { 2053 ScopedUtfChars name(env, javaName); 2054 if (name.c_str() == NULL) { 2055 return; 2056 } 2057 ScopedUtfChars value(env, javaValue); 2058 if (value.c_str() == NULL) { 2059 return; 2060 } 2061 throwIfMinusOne(env, "setenv", setenv(name.c_str(), value.c_str(), overwrite)); 2062} 2063 2064static void Linux_seteuid(JNIEnv* env, jobject, jint euid) { 2065 throwIfMinusOne(env, "seteuid", TEMP_FAILURE_RETRY(seteuid(euid))); 2066} 2067 2068static void Linux_setgid(JNIEnv* env, jobject, jint gid) { 2069 throwIfMinusOne(env, "setgid", TEMP_FAILURE_RETRY(setgid(gid))); 2070} 2071 2072static void Linux_setpgid(JNIEnv* env, jobject, jint pid, int pgid) { 2073 throwIfMinusOne(env, "setpgid", TEMP_FAILURE_RETRY(setpgid(pid, pgid))); 2074} 2075 2076static void Linux_setregid(JNIEnv* env, jobject, jint rgid, int egid) { 2077 throwIfMinusOne(env, "setregid", TEMP_FAILURE_RETRY(setregid(rgid, egid))); 2078} 2079 2080static void Linux_setreuid(JNIEnv* env, jobject, jint ruid, int euid) { 2081 throwIfMinusOne(env, "setreuid", TEMP_FAILURE_RETRY(setreuid(ruid, euid))); 2082} 2083 2084static jint Linux_setsid(JNIEnv* env, jobject) { 2085 return throwIfMinusOne(env, "setsid", TEMP_FAILURE_RETRY(setsid())); 2086} 2087 2088static void Linux_setsockoptByte(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jint value) { 2089 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2090 u_char byte = value; 2091 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &byte, sizeof(byte)))); 2092} 2093 2094static void Linux_setsockoptIfreq(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jstring javaInterfaceName) { 2095 struct ifreq req; 2096 if (!fillIfreq(env, javaInterfaceName, req)) { 2097 return; 2098 } 2099 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2100 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req, sizeof(req)))); 2101} 2102 2103static void Linux_setsockoptInt(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jint value) { 2104 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2105 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &value, sizeof(value)))); 2106} 2107 2108static void Linux_setsockoptIpMreqn(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jint value) { 2109 ip_mreqn req; 2110 memset(&req, 0, sizeof(req)); 2111 req.imr_ifindex = value; 2112 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2113 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req, sizeof(req)))); 2114} 2115 2116static void Linux_setsockoptGroupReq(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jobject javaGroupReq) { 2117 struct group_req req; 2118 memset(&req, 0, sizeof(req)); 2119 2120 static jfieldID grInterfaceFid = env->GetFieldID(JniConstants::structGroupReqClass, "gr_interface", "I"); 2121 req.gr_interface = env->GetIntField(javaGroupReq, grInterfaceFid); 2122 // Get the IPv4 or IPv6 multicast address to join or leave. 2123 static jfieldID grGroupFid = env->GetFieldID(JniConstants::structGroupReqClass, "gr_group", "Ljava/net/InetAddress;"); 2124 ScopedLocalRef<jobject> javaGroup(env, env->GetObjectField(javaGroupReq, grGroupFid)); 2125 socklen_t sa_len; 2126 if (!inetAddressToSockaddrVerbatim(env, javaGroup.get(), 0, req.gr_group, sa_len)) { 2127 return; 2128 } 2129 2130 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2131 int rc = TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req, sizeof(req))); 2132 if (rc == -1 && errno == EINVAL) { 2133 // Maybe we're a 32-bit binary talking to a 64-bit kernel? 2134 // glibc doesn't automatically handle this. 2135 // http://sourceware.org/bugzilla/show_bug.cgi?id=12080 2136 struct group_req64 { 2137 uint32_t gr_interface; 2138 uint32_t my_padding; 2139 sockaddr_storage gr_group; 2140 }; 2141 group_req64 req64; 2142 req64.gr_interface = req.gr_interface; 2143 memcpy(&req64.gr_group, &req.gr_group, sizeof(req.gr_group)); 2144 rc = TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req64, sizeof(req64))); 2145 } 2146 throwIfMinusOne(env, "setsockopt", rc); 2147} 2148 2149static void Linux_setsockoptGroupSourceReq(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jobject javaGroupSourceReq) { 2150 socklen_t sa_len; 2151 struct group_source_req req; 2152 memset(&req, 0, sizeof(req)); 2153 2154 static jfieldID gsrInterfaceFid = env->GetFieldID(JniConstants::structGroupSourceReqClass, "gsr_interface", "I"); 2155 req.gsr_interface = env->GetIntField(javaGroupSourceReq, gsrInterfaceFid); 2156 // Get the IPv4 or IPv6 multicast address to join or leave. 2157 static jfieldID gsrGroupFid = env->GetFieldID(JniConstants::structGroupSourceReqClass, "gsr_group", "Ljava/net/InetAddress;"); 2158 ScopedLocalRef<jobject> javaGroup(env, env->GetObjectField(javaGroupSourceReq, gsrGroupFid)); 2159 if (!inetAddressToSockaddrVerbatim(env, javaGroup.get(), 0, req.gsr_group, sa_len)) { 2160 return; 2161 } 2162 2163 // Get the IPv4 or IPv6 multicast address to add to the filter. 2164 static jfieldID gsrSourceFid = env->GetFieldID(JniConstants::structGroupSourceReqClass, "gsr_source", "Ljava/net/InetAddress;"); 2165 ScopedLocalRef<jobject> javaSource(env, env->GetObjectField(javaGroupSourceReq, gsrSourceFid)); 2166 if (!inetAddressToSockaddrVerbatim(env, javaSource.get(), 0, req.gsr_source, sa_len)) { 2167 return; 2168 } 2169 2170 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2171 int rc = TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req, sizeof(req))); 2172 if (rc == -1 && errno == EINVAL) { 2173 // Maybe we're a 32-bit binary talking to a 64-bit kernel? 2174 // glibc doesn't automatically handle this. 2175 // http://sourceware.org/bugzilla/show_bug.cgi?id=12080 2176 struct group_source_req64 { 2177 uint32_t gsr_interface; 2178 uint32_t my_padding; 2179 sockaddr_storage gsr_group; 2180 sockaddr_storage gsr_source; 2181 }; 2182 group_source_req64 req64; 2183 req64.gsr_interface = req.gsr_interface; 2184 memcpy(&req64.gsr_group, &req.gsr_group, sizeof(req.gsr_group)); 2185 memcpy(&req64.gsr_source, &req.gsr_source, sizeof(req.gsr_source)); 2186 rc = TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req64, sizeof(req64))); 2187 } 2188 throwIfMinusOne(env, "setsockopt", rc); 2189} 2190 2191static void Linux_setsockoptLinger(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jobject javaLinger) { 2192 static jfieldID lOnoffFid = env->GetFieldID(JniConstants::structLingerClass, "l_onoff", "I"); 2193 static jfieldID lLingerFid = env->GetFieldID(JniConstants::structLingerClass, "l_linger", "I"); 2194 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2195 struct linger value; 2196 value.l_onoff = env->GetIntField(javaLinger, lOnoffFid); 2197 value.l_linger = env->GetIntField(javaLinger, lLingerFid); 2198 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &value, sizeof(value)))); 2199} 2200 2201static void Linux_setsockoptTimeval(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jobject javaTimeval) { 2202 static jfieldID tvSecFid = env->GetFieldID(JniConstants::structTimevalClass, "tv_sec", "J"); 2203 static jfieldID tvUsecFid = env->GetFieldID(JniConstants::structTimevalClass, "tv_usec", "J"); 2204 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2205 struct timeval value; 2206 value.tv_sec = env->GetLongField(javaTimeval, tvSecFid); 2207 value.tv_usec = env->GetLongField(javaTimeval, tvUsecFid); 2208 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &value, sizeof(value)))); 2209} 2210 2211static void Linux_setuid(JNIEnv* env, jobject, jint uid) { 2212 throwIfMinusOne(env, "setuid", TEMP_FAILURE_RETRY(setuid(uid))); 2213} 2214 2215static void Linux_setxattr(JNIEnv* env, jobject, jstring javaPath, jstring javaName, 2216 jbyteArray javaValue, jint flags) { 2217 ScopedUtfChars path(env, javaPath); 2218 if (path.c_str() == NULL) { 2219 return; 2220 } 2221 ScopedUtfChars name(env, javaName); 2222 if (name.c_str() == NULL) { 2223 return; 2224 } 2225 ScopedBytesRO value(env, javaValue); 2226 if (value.get() == NULL) { 2227 return; 2228 } 2229 size_t valueLength = env->GetArrayLength(javaValue); 2230 int res = setxattr(path.c_str(), name.c_str(), value.get(), valueLength, flags); 2231 if (res < 0) { 2232 throwErrnoException(env, "setxattr"); 2233 } 2234} 2235 2236static void Linux_shutdown(JNIEnv* env, jobject, jobject javaFd, jint how) { 2237 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2238 throwIfMinusOne(env, "shutdown", TEMP_FAILURE_RETRY(shutdown(fd, how))); 2239} 2240 2241static jobject Linux_socket(JNIEnv* env, jobject, jint domain, jint type, jint protocol) { 2242 if (domain == AF_PACKET) { 2243 protocol = htons(protocol); // Packet sockets specify the protocol in host byte order. 2244 } 2245 int fd = throwIfMinusOne(env, "socket", TEMP_FAILURE_RETRY(socket(domain, type, protocol))); 2246 return fd != -1 ? jniCreateFileDescriptor(env, fd) : NULL; 2247} 2248 2249static void Linux_socketpair(JNIEnv* env, jobject, jint domain, jint type, jint protocol, jobject javaFd1, jobject javaFd2) { 2250 int fds[2]; 2251 int rc = throwIfMinusOne(env, "socketpair", TEMP_FAILURE_RETRY(socketpair(domain, type, protocol, fds))); 2252 if (rc != -1) { 2253 jniSetFileDescriptorOfFD(env, javaFd1, fds[0]); 2254 jniSetFileDescriptorOfFD(env, javaFd2, fds[1]); 2255 } 2256} 2257 2258static jobject Linux_stat(JNIEnv* env, jobject, jstring javaPath) { 2259 return doStat(env, javaPath, false); 2260} 2261 2262static jobject Linux_statvfs(JNIEnv* env, jobject, jstring javaPath) { 2263 ScopedUtfChars path(env, javaPath); 2264 if (path.c_str() == NULL) { 2265 return NULL; 2266 } 2267 struct statvfs sb; 2268 int rc = TEMP_FAILURE_RETRY(statvfs(path.c_str(), &sb)); 2269 if (rc == -1) { 2270 throwErrnoException(env, "statvfs"); 2271 return NULL; 2272 } 2273 return makeStructStatVfs(env, sb); 2274} 2275 2276static jstring Linux_strerror(JNIEnv* env, jobject, jint errnum) { 2277 char buffer[BUFSIZ]; 2278 const char* message = jniStrError(errnum, buffer, sizeof(buffer)); 2279 return env->NewStringUTF(message); 2280} 2281 2282static jstring Linux_strsignal(JNIEnv* env, jobject, jint signal) { 2283 return env->NewStringUTF(strsignal(signal)); 2284} 2285 2286static void Linux_symlink(JNIEnv* env, jobject, jstring javaOldPath, jstring javaNewPath) { 2287 ScopedUtfChars oldPath(env, javaOldPath); 2288 if (oldPath.c_str() == NULL) { 2289 return; 2290 } 2291 ScopedUtfChars newPath(env, javaNewPath); 2292 if (newPath.c_str() == NULL) { 2293 return; 2294 } 2295 throwIfMinusOne(env, "symlink", TEMP_FAILURE_RETRY(symlink(oldPath.c_str(), newPath.c_str()))); 2296} 2297 2298static jlong Linux_sysconf(JNIEnv* env, jobject, jint name) { 2299 // Since -1 is a valid result from sysconf(3), detecting failure is a little more awkward. 2300 errno = 0; 2301 long result = sysconf(name); 2302 if (result == -1L && errno == EINVAL) { 2303 throwErrnoException(env, "sysconf"); 2304 } 2305 return result; 2306} 2307 2308static void Linux_tcdrain(JNIEnv* env, jobject, jobject javaFd) { 2309 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2310 throwIfMinusOne(env, "tcdrain", TEMP_FAILURE_RETRY(tcdrain(fd))); 2311} 2312 2313static void Linux_tcsendbreak(JNIEnv* env, jobject, jobject javaFd, jint duration) { 2314 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2315 throwIfMinusOne(env, "tcsendbreak", TEMP_FAILURE_RETRY(tcsendbreak(fd, duration))); 2316} 2317 2318static jint Linux_umaskImpl(JNIEnv*, jobject, jint mask) { 2319 return umask(mask); 2320} 2321 2322static jobject Linux_uname(JNIEnv* env, jobject) { 2323 struct utsname buf; 2324 if (TEMP_FAILURE_RETRY(uname(&buf)) == -1) { 2325 return NULL; // Can't happen. 2326 } 2327 return makeStructUtsname(env, buf); 2328} 2329 2330static void Linux_unlink(JNIEnv* env, jobject, jstring javaPathname) { 2331 ScopedUtfChars pathname(env, javaPathname); 2332 if (pathname.c_str() == NULL) { 2333 return; 2334 } 2335 throwIfMinusOne(env, "unlink", unlink(pathname.c_str())); 2336} 2337 2338static void Linux_unsetenv(JNIEnv* env, jobject, jstring javaName) { 2339 ScopedUtfChars name(env, javaName); 2340 if (name.c_str() == NULL) { 2341 return; 2342 } 2343 throwIfMinusOne(env, "unsetenv", unsetenv(name.c_str())); 2344} 2345 2346static jint Linux_waitpid(JNIEnv* env, jobject, jint pid, jobject javaStatus, jint options) { 2347 int status; 2348 int rc = throwIfMinusOne(env, "waitpid", TEMP_FAILURE_RETRY(waitpid(pid, &status, options))); 2349 if (rc != -1) { 2350 static jfieldID valueFid = env->GetFieldID(JniConstants::mutableIntClass, "value", "I"); 2351 env->SetIntField(javaStatus, valueFid, status); 2352 } 2353 return rc; 2354} 2355 2356static jint Linux_writeBytes(JNIEnv* env, jobject, jobject javaFd, jbyteArray javaBytes, jint byteOffset, jint byteCount) { 2357 ScopedBytesRO bytes(env, javaBytes); 2358 if (bytes.get() == NULL) { 2359 return -1; 2360 } 2361 return IO_FAILURE_RETRY(env, ssize_t, write, javaFd, bytes.get() + byteOffset, byteCount); 2362} 2363 2364static jint Linux_writev(JNIEnv* env, jobject, jobject javaFd, jobjectArray buffers, jintArray offsets, jintArray byteCounts) { 2365 IoVec<ScopedBytesRO> ioVec(env, env->GetArrayLength(buffers)); 2366 if (!ioVec.init(buffers, offsets, byteCounts)) { 2367 return -1; 2368 } 2369 return IO_FAILURE_RETRY(env, ssize_t, writev, javaFd, ioVec.get(), ioVec.size()); 2370} 2371 2372#define NATIVE_METHOD_OVERLOAD(className, functionName, signature, variant) \ 2373 { #functionName, signature, reinterpret_cast<void*>(className ## _ ## functionName ## variant) } 2374 2375static JNINativeMethod gMethods[] = { 2376 NATIVE_METHOD(Linux, accept, "(Ljava/io/FileDescriptor;Ljava/net/SocketAddress;)Ljava/io/FileDescriptor;"), 2377 NATIVE_METHOD(Linux, access, "(Ljava/lang/String;I)Z"), 2378 NATIVE_METHOD(Linux, android_getaddrinfo, "(Ljava/lang/String;Landroid/system/StructAddrinfo;I)[Ljava/net/InetAddress;"), 2379 NATIVE_METHOD(Linux, bind, "(Ljava/io/FileDescriptor;Ljava/net/InetAddress;I)V"), 2380 NATIVE_METHOD_OVERLOAD(Linux, bind, "(Ljava/io/FileDescriptor;Ljava/net/SocketAddress;)V", SocketAddress), 2381 NATIVE_METHOD(Linux, capget, 2382 "(Landroid/system/StructCapUserHeader;)[Landroid/system/StructCapUserData;"), 2383 NATIVE_METHOD(Linux, capset, 2384 "(Landroid/system/StructCapUserHeader;[Landroid/system/StructCapUserData;)V"), 2385 NATIVE_METHOD(Linux, chmod, "(Ljava/lang/String;I)V"), 2386 NATIVE_METHOD(Linux, chown, "(Ljava/lang/String;II)V"), 2387 NATIVE_METHOD(Linux, close, "(Ljava/io/FileDescriptor;)V"), 2388 NATIVE_METHOD(Linux, connect, "(Ljava/io/FileDescriptor;Ljava/net/InetAddress;I)V"), 2389 NATIVE_METHOD_OVERLOAD(Linux, connect, "(Ljava/io/FileDescriptor;Ljava/net/SocketAddress;)V", SocketAddress), 2390 NATIVE_METHOD(Linux, dup, "(Ljava/io/FileDescriptor;)Ljava/io/FileDescriptor;"), 2391 NATIVE_METHOD(Linux, dup2, "(Ljava/io/FileDescriptor;I)Ljava/io/FileDescriptor;"), 2392 NATIVE_METHOD(Linux, environ, "()[Ljava/lang/String;"), 2393 NATIVE_METHOD(Linux, execv, "(Ljava/lang/String;[Ljava/lang/String;)V"), 2394 NATIVE_METHOD(Linux, execve, "(Ljava/lang/String;[Ljava/lang/String;[Ljava/lang/String;)V"), 2395 NATIVE_METHOD(Linux, fchmod, "(Ljava/io/FileDescriptor;I)V"), 2396 NATIVE_METHOD(Linux, fchown, "(Ljava/io/FileDescriptor;II)V"), 2397 NATIVE_METHOD(Linux, fcntlFlock, "(Ljava/io/FileDescriptor;ILandroid/system/StructFlock;)I"), 2398 NATIVE_METHOD(Linux, fcntlInt, "(Ljava/io/FileDescriptor;II)I"), 2399 NATIVE_METHOD(Linux, fcntlVoid, "(Ljava/io/FileDescriptor;I)I"), 2400 NATIVE_METHOD(Linux, fdatasync, "(Ljava/io/FileDescriptor;)V"), 2401 NATIVE_METHOD(Linux, fstat, "(Ljava/io/FileDescriptor;)Landroid/system/StructStat;"), 2402 NATIVE_METHOD(Linux, fstatvfs, "(Ljava/io/FileDescriptor;)Landroid/system/StructStatVfs;"), 2403 NATIVE_METHOD(Linux, fsync, "(Ljava/io/FileDescriptor;)V"), 2404 NATIVE_METHOD(Linux, ftruncate, "(Ljava/io/FileDescriptor;J)V"), 2405 NATIVE_METHOD(Linux, gai_strerror, "(I)Ljava/lang/String;"), 2406 NATIVE_METHOD(Linux, getegid, "()I"), 2407 NATIVE_METHOD(Linux, geteuid, "()I"), 2408 NATIVE_METHOD(Linux, getgid, "()I"), 2409 NATIVE_METHOD(Linux, getenv, "(Ljava/lang/String;)Ljava/lang/String;"), 2410 NATIVE_METHOD(Linux, getnameinfo, "(Ljava/net/InetAddress;I)Ljava/lang/String;"), 2411 NATIVE_METHOD(Linux, getpeername, "(Ljava/io/FileDescriptor;)Ljava/net/SocketAddress;"), 2412 NATIVE_METHOD(Linux, getpgid, "(I)I"), 2413 NATIVE_METHOD(Linux, getpid, "()I"), 2414 NATIVE_METHOD(Linux, getppid, "()I"), 2415 NATIVE_METHOD(Linux, getpwnam, "(Ljava/lang/String;)Landroid/system/StructPasswd;"), 2416 NATIVE_METHOD(Linux, getpwuid, "(I)Landroid/system/StructPasswd;"), 2417 NATIVE_METHOD(Linux, getsockname, "(Ljava/io/FileDescriptor;)Ljava/net/SocketAddress;"), 2418 NATIVE_METHOD(Linux, getsockoptByte, "(Ljava/io/FileDescriptor;II)I"), 2419 NATIVE_METHOD(Linux, getsockoptInAddr, "(Ljava/io/FileDescriptor;II)Ljava/net/InetAddress;"), 2420 NATIVE_METHOD(Linux, getsockoptInt, "(Ljava/io/FileDescriptor;II)I"), 2421 NATIVE_METHOD(Linux, getsockoptLinger, "(Ljava/io/FileDescriptor;II)Landroid/system/StructLinger;"), 2422 NATIVE_METHOD(Linux, getsockoptTimeval, "(Ljava/io/FileDescriptor;II)Landroid/system/StructTimeval;"), 2423 NATIVE_METHOD(Linux, getsockoptUcred, "(Ljava/io/FileDescriptor;II)Landroid/system/StructUcred;"), 2424 NATIVE_METHOD(Linux, gettid, "()I"), 2425 NATIVE_METHOD(Linux, getuid, "()I"), 2426 NATIVE_METHOD(Linux, getxattr, "(Ljava/lang/String;Ljava/lang/String;)[B"), 2427 NATIVE_METHOD(Linux, getifaddrs, "()[Landroid/system/StructIfaddrs;"), 2428 NATIVE_METHOD(Linux, if_indextoname, "(I)Ljava/lang/String;"), 2429 NATIVE_METHOD(Linux, if_nametoindex, "(Ljava/lang/String;)I"), 2430 NATIVE_METHOD(Linux, inet_pton, "(ILjava/lang/String;)Ljava/net/InetAddress;"), 2431 NATIVE_METHOD(Linux, ioctlFlags, "(Ljava/io/FileDescriptor;Ljava/lang/String;)I"), 2432 NATIVE_METHOD(Linux, ioctlInetAddress, "(Ljava/io/FileDescriptor;ILjava/lang/String;)Ljava/net/InetAddress;"), 2433 NATIVE_METHOD(Linux, ioctlInt, "(Ljava/io/FileDescriptor;ILandroid/util/MutableInt;)I"), 2434 NATIVE_METHOD(Linux, ioctlMTU, "(Ljava/io/FileDescriptor;Ljava/lang/String;)I"), 2435 NATIVE_METHOD(Linux, isatty, "(Ljava/io/FileDescriptor;)Z"), 2436 NATIVE_METHOD(Linux, kill, "(II)V"), 2437 NATIVE_METHOD(Linux, lchown, "(Ljava/lang/String;II)V"), 2438 NATIVE_METHOD(Linux, link, "(Ljava/lang/String;Ljava/lang/String;)V"), 2439 NATIVE_METHOD(Linux, listen, "(Ljava/io/FileDescriptor;I)V"), 2440 NATIVE_METHOD(Linux, listxattr, "(Ljava/lang/String;)[Ljava/lang/String;"), 2441 NATIVE_METHOD(Linux, lseek, "(Ljava/io/FileDescriptor;JI)J"), 2442 NATIVE_METHOD(Linux, lstat, "(Ljava/lang/String;)Landroid/system/StructStat;"), 2443 NATIVE_METHOD(Linux, mincore, "(JJ[B)V"), 2444 NATIVE_METHOD(Linux, mkdir, "(Ljava/lang/String;I)V"), 2445 NATIVE_METHOD(Linux, mkfifo, "(Ljava/lang/String;I)V"), 2446 NATIVE_METHOD(Linux, mlock, "(JJ)V"), 2447 NATIVE_METHOD(Linux, mmap, "(JJIILjava/io/FileDescriptor;J)J"), 2448 NATIVE_METHOD(Linux, msync, "(JJI)V"), 2449 NATIVE_METHOD(Linux, munlock, "(JJ)V"), 2450 NATIVE_METHOD(Linux, munmap, "(JJ)V"), 2451 NATIVE_METHOD(Linux, open, "(Ljava/lang/String;II)Ljava/io/FileDescriptor;"), 2452 NATIVE_METHOD(Linux, pipe2, "(I)[Ljava/io/FileDescriptor;"), 2453 NATIVE_METHOD(Linux, poll, "([Landroid/system/StructPollfd;I)I"), 2454 NATIVE_METHOD(Linux, posix_fallocate, "(Ljava/io/FileDescriptor;JJ)V"), 2455 NATIVE_METHOD(Linux, prctl, "(IJJJJ)I"), 2456 NATIVE_METHOD(Linux, preadBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIJ)I"), 2457 NATIVE_METHOD(Linux, pwriteBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIJ)I"), 2458 NATIVE_METHOD(Linux, readBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;II)I"), 2459 NATIVE_METHOD(Linux, readlink, "(Ljava/lang/String;)Ljava/lang/String;"), 2460 NATIVE_METHOD(Linux, realpath, "(Ljava/lang/String;)Ljava/lang/String;"), 2461 NATIVE_METHOD(Linux, readv, "(Ljava/io/FileDescriptor;[Ljava/lang/Object;[I[I)I"), 2462 NATIVE_METHOD(Linux, recvfromBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIILjava/net/InetSocketAddress;)I"), 2463 NATIVE_METHOD(Linux, remove, "(Ljava/lang/String;)V"), 2464 NATIVE_METHOD(Linux, removexattr, "(Ljava/lang/String;Ljava/lang/String;)V"), 2465 NATIVE_METHOD(Linux, rename, "(Ljava/lang/String;Ljava/lang/String;)V"), 2466 NATIVE_METHOD(Linux, sendfile, "(Ljava/io/FileDescriptor;Ljava/io/FileDescriptor;Landroid/util/MutableLong;J)J"), 2467 NATIVE_METHOD(Linux, sendtoBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIILjava/net/InetAddress;I)I"), 2468 NATIVE_METHOD_OVERLOAD(Linux, sendtoBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIILjava/net/SocketAddress;)I", SocketAddress), 2469 NATIVE_METHOD(Linux, setegid, "(I)V"), 2470 NATIVE_METHOD(Linux, setenv, "(Ljava/lang/String;Ljava/lang/String;Z)V"), 2471 NATIVE_METHOD(Linux, seteuid, "(I)V"), 2472 NATIVE_METHOD(Linux, setgid, "(I)V"), 2473 NATIVE_METHOD(Linux, setpgid, "(II)V"), 2474 NATIVE_METHOD(Linux, setregid, "(II)V"), 2475 NATIVE_METHOD(Linux, setreuid, "(II)V"), 2476 NATIVE_METHOD(Linux, setsid, "()I"), 2477 NATIVE_METHOD(Linux, setsockoptByte, "(Ljava/io/FileDescriptor;III)V"), 2478 NATIVE_METHOD(Linux, setsockoptIfreq, "(Ljava/io/FileDescriptor;IILjava/lang/String;)V"), 2479 NATIVE_METHOD(Linux, setsockoptInt, "(Ljava/io/FileDescriptor;III)V"), 2480 NATIVE_METHOD(Linux, setsockoptIpMreqn, "(Ljava/io/FileDescriptor;III)V"), 2481 NATIVE_METHOD(Linux, setsockoptGroupReq, "(Ljava/io/FileDescriptor;IILandroid/system/StructGroupReq;)V"), 2482 NATIVE_METHOD(Linux, setsockoptGroupSourceReq, "(Ljava/io/FileDescriptor;IILandroid/system/StructGroupSourceReq;)V"), 2483 NATIVE_METHOD(Linux, setsockoptLinger, "(Ljava/io/FileDescriptor;IILandroid/system/StructLinger;)V"), 2484 NATIVE_METHOD(Linux, setsockoptTimeval, "(Ljava/io/FileDescriptor;IILandroid/system/StructTimeval;)V"), 2485 NATIVE_METHOD(Linux, setuid, "(I)V"), 2486 NATIVE_METHOD(Linux, setxattr, "(Ljava/lang/String;Ljava/lang/String;[BI)V"), 2487 NATIVE_METHOD(Linux, shutdown, "(Ljava/io/FileDescriptor;I)V"), 2488 NATIVE_METHOD(Linux, socket, "(III)Ljava/io/FileDescriptor;"), 2489 NATIVE_METHOD(Linux, socketpair, "(IIILjava/io/FileDescriptor;Ljava/io/FileDescriptor;)V"), 2490 NATIVE_METHOD(Linux, stat, "(Ljava/lang/String;)Landroid/system/StructStat;"), 2491 NATIVE_METHOD(Linux, statvfs, "(Ljava/lang/String;)Landroid/system/StructStatVfs;"), 2492 NATIVE_METHOD(Linux, strerror, "(I)Ljava/lang/String;"), 2493 NATIVE_METHOD(Linux, strsignal, "(I)Ljava/lang/String;"), 2494 NATIVE_METHOD(Linux, symlink, "(Ljava/lang/String;Ljava/lang/String;)V"), 2495 NATIVE_METHOD(Linux, sysconf, "(I)J"), 2496 NATIVE_METHOD(Linux, tcdrain, "(Ljava/io/FileDescriptor;)V"), 2497 NATIVE_METHOD(Linux, tcsendbreak, "(Ljava/io/FileDescriptor;I)V"), 2498 NATIVE_METHOD(Linux, umaskImpl, "(I)I"), 2499 NATIVE_METHOD(Linux, uname, "()Landroid/system/StructUtsname;"), 2500 NATIVE_METHOD(Linux, unlink, "(Ljava/lang/String;)V"), 2501 NATIVE_METHOD(Linux, unsetenv, "(Ljava/lang/String;)V"), 2502 NATIVE_METHOD(Linux, waitpid, "(ILandroid/util/MutableInt;I)I"), 2503 NATIVE_METHOD(Linux, writeBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;II)I"), 2504 NATIVE_METHOD(Linux, writev, "(Ljava/io/FileDescriptor;[Ljava/lang/Object;[I[I)I"), 2505}; 2506void register_libcore_io_Linux(JNIEnv* env) { 2507 jniRegisterNativeMethods(env, "libcore/io/Linux", gMethods, NELEM(gMethods)); 2508} 2509