libcore_io_Linux.cpp revision 77ffbdbe73a31f4de07c95dfd978af3c6679cc7f
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/resource.h> 37#include <sys/socket.h> 38#include <sys/stat.h> 39#include <sys/syscall.h> 40#include <sys/time.h> 41#include <sys/types.h> 42#include <sys/uio.h> 43#include <sys/un.h> 44#include <sys/utsname.h> 45#include <sys/wait.h> 46#include <sys/xattr.h> 47#include <termios.h> 48#include <unistd.h> 49 50#include <memory> 51 52#include <android-base/file.h> 53#include <android-base/strings.h> 54#include <log/log.h> 55#include <nativehelper/AsynchronousCloseMonitor.h> 56#include <nativehelper/JNIHelp.h> 57#include <nativehelper/JniConstants.h> 58#include <nativehelper/ScopedBytes.h> 59#include <nativehelper/ScopedLocalRef.h> 60#include <nativehelper/ScopedPrimitiveArray.h> 61#include <nativehelper/ScopedUtfChars.h> 62#include <nativehelper/toStringArray.h> 63 64#include "ExecStrings.h" 65#include "JniException.h" 66#include "NetworkUtilities.h" 67#include "Portability.h" 68 69#ifndef __unused 70#define __unused __attribute__((__unused__)) 71#endif 72 73#define TO_JAVA_STRING(NAME, EXP) \ 74 jstring NAME = env->NewStringUTF(EXP); \ 75 if ((NAME) == NULL) return NULL; 76 77struct addrinfo_deleter { 78 void operator()(addrinfo* p) const { 79 if (p != NULL) { // bionic's freeaddrinfo(3) crashes when passed NULL. 80 freeaddrinfo(p); 81 } 82 } 83}; 84 85struct c_deleter { 86 void operator()(void* p) const { 87 free(p); 88 } 89}; 90 91static bool isIPv4MappedAddress(const sockaddr *sa) { 92 const sockaddr_in6 *sin6 = reinterpret_cast<const sockaddr_in6*>(sa); 93 return sa != NULL && sa->sa_family == AF_INET6 && 94 (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) || 95 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)); // We map 0.0.0.0 to ::, so :: is mapped. 96} 97 98/** 99 * Perform a socket operation that specifies an IP address, possibly falling back from specifying 100 * the address as an IPv4-mapped IPv6 address in a struct sockaddr_in6 to specifying it as an IPv4 101 * address in a struct sockaddr_in. 102 * 103 * This is needed because all sockets created by the java.net APIs are IPv6 sockets, and on those 104 * sockets, IPv4 operations use IPv4-mapped addresses stored in a struct sockaddr_in6. But sockets 105 * created using Linux.socket(AF_INET, ...) are IPv4 sockets and only support operations using IPv4 106 * socket addresses structures. 107 */ 108#define NET_IPV4_FALLBACK(jni_env, return_type, syscall_name, java_fd, java_addr, port, null_addr_ok, args...) ({ \ 109 return_type _rc = -1; \ 110 do { \ 111 sockaddr_storage _ss; \ 112 socklen_t _salen; \ 113 if ((java_addr) == NULL && (null_addr_ok)) { \ 114 /* No IP address specified (e.g., sendto() on a connected socket). */ \ 115 _salen = 0; \ 116 } else if (!inetAddressToSockaddr(jni_env, java_addr, port, _ss, _salen)) { \ 117 /* Invalid socket address, return -1. inetAddressToSockaddr has already thrown. */ \ 118 break; \ 119 } \ 120 sockaddr* _sa = _salen ? reinterpret_cast<sockaddr*>(&_ss) : NULL; \ 121 /* inetAddressToSockaddr always returns an IPv6 sockaddr. Assume that java_fd was created \ 122 * by Java API calls, which always create IPv6 socket fds, and pass it in as is. */ \ 123 _rc = NET_FAILURE_RETRY(jni_env, return_type, syscall_name, java_fd, ##args, _sa, _salen); \ 124 if (_rc == -1 && errno == EAFNOSUPPORT && _salen && isIPv4MappedAddress(_sa)) { \ 125 /* We passed in an IPv4 address in an IPv6 sockaddr and the kernel told us that we got \ 126 * the address family wrong. Pass in the same address in an IPv4 sockaddr. */ \ 127 (jni_env)->ExceptionClear(); \ 128 if (!inetAddressToSockaddrVerbatim(jni_env, java_addr, port, _ss, _salen)) { \ 129 break; \ 130 } \ 131 _sa = reinterpret_cast<sockaddr*>(&_ss); \ 132 _rc = NET_FAILURE_RETRY(jni_env, return_type, syscall_name, java_fd, ##args, _sa, _salen); \ 133 } \ 134 } while (0); \ 135 _rc; }) \ 136 137/** 138 * Used to retry networking system calls that can be interrupted with a signal. Unlike 139 * TEMP_FAILURE_RETRY, this also handles the case where 140 * AsynchronousCloseMonitor::signalBlockedThreads(fd) is used to signal a close() or 141 * Thread.interrupt(). Other signals that result in an EINTR result are ignored and the system call 142 * is retried. 143 * 144 * Returns the result of the system call though a Java exception will be pending if the result is 145 * -1: a SocketException if signaled via AsynchronousCloseMonitor, or ErrnoException for other 146 * failures. 147 */ 148#define NET_FAILURE_RETRY(jni_env, return_type, syscall_name, java_fd, ...) ({ \ 149 return_type _rc = -1; \ 150 int _syscallErrno; \ 151 do { \ 152 bool _wasSignaled; \ 153 { \ 154 int _fd = jniGetFDFromFileDescriptor(jni_env, java_fd); \ 155 AsynchronousCloseMonitor _monitor(_fd); \ 156 _rc = syscall_name(_fd, __VA_ARGS__); \ 157 _syscallErrno = errno; \ 158 _wasSignaled = _monitor.wasSignaled(); \ 159 } \ 160 if (_wasSignaled) { \ 161 jniThrowException(jni_env, "java/net/SocketException", "Socket closed"); \ 162 _rc = -1; \ 163 break; \ 164 } \ 165 if (_rc == -1 && _syscallErrno != EINTR) { \ 166 /* TODO: with a format string we could show the arguments too, like strace(1). */ \ 167 throwErrnoException(jni_env, # syscall_name); \ 168 break; \ 169 } \ 170 } while (_rc == -1); /* _syscallErrno == EINTR && !_wasSignaled */ \ 171 if (_rc == -1) { \ 172 /* If the syscall failed, re-set errno: throwing an exception might have modified it. */ \ 173 errno = _syscallErrno; \ 174 } \ 175 _rc; }) 176 177/** 178 * Used to retry system calls that can be interrupted with a signal. Unlike TEMP_FAILURE_RETRY, this 179 * also handles the case where AsynchronousCloseMonitor::signalBlockedThreads(fd) is used to signal 180 * a close() or Thread.interrupt(). Other signals that result in an EINTR result are ignored and the 181 * system call is retried. 182 * 183 * Returns the result of the system call though a Java exception will be pending if the result is 184 * -1: an IOException if the file descriptor is already closed, a InterruptedIOException if signaled 185 * via AsynchronousCloseMonitor, or ErrnoException for other failures. 186 */ 187#define IO_FAILURE_RETRY(jni_env, return_type, syscall_name, java_fd, ...) ({ \ 188 return_type _rc = -1; \ 189 int _syscallErrno; \ 190 do { \ 191 bool _wasSignaled; \ 192 { \ 193 int _fd = jniGetFDFromFileDescriptor(jni_env, java_fd); \ 194 AsynchronousCloseMonitor _monitor(_fd); \ 195 _rc = syscall_name(_fd, __VA_ARGS__); \ 196 _syscallErrno = errno; \ 197 _wasSignaled = _monitor.wasSignaled(); \ 198 } \ 199 if (_wasSignaled) { \ 200 jniThrowException(jni_env, "java/io/InterruptedIOException", # syscall_name " interrupted"); \ 201 _rc = -1; \ 202 break; \ 203 } \ 204 if (_rc == -1 && _syscallErrno != EINTR) { \ 205 /* TODO: with a format string we could show the arguments too, like strace(1). */ \ 206 throwErrnoException(jni_env, # syscall_name); \ 207 break; \ 208 } \ 209 } while (_rc == -1); /* && _syscallErrno == EINTR && !_wasSignaled */ \ 210 if (_rc == -1) { \ 211 /* If the syscall failed, re-set errno: throwing an exception might have modified it. */ \ 212 errno = _syscallErrno; \ 213 } \ 214 _rc; }) 215 216#define NULL_ADDR_OK true 217#define NULL_ADDR_FORBIDDEN false 218 219static void throwException(JNIEnv* env, jclass exceptionClass, jmethodID ctor3, jmethodID ctor2, 220 const char* functionName, int error) { 221 jthrowable cause = NULL; 222 if (env->ExceptionCheck()) { 223 cause = env->ExceptionOccurred(); 224 env->ExceptionClear(); 225 } 226 227 ScopedLocalRef<jstring> detailMessage(env, env->NewStringUTF(functionName)); 228 if (detailMessage.get() == NULL) { 229 // Not really much we can do here. We're probably dead in the water, 230 // but let's try to stumble on... 231 env->ExceptionClear(); 232 } 233 234 jobject exception; 235 if (cause != NULL) { 236 exception = env->NewObject(exceptionClass, ctor3, detailMessage.get(), error, cause); 237 } else { 238 exception = env->NewObject(exceptionClass, ctor2, detailMessage.get(), error); 239 } 240 env->Throw(reinterpret_cast<jthrowable>(exception)); 241} 242 243static void throwErrnoException(JNIEnv* env, const char* functionName) { 244 int error = errno; 245 static jmethodID ctor3 = env->GetMethodID(JniConstants::errnoExceptionClass, 246 "<init>", "(Ljava/lang/String;ILjava/lang/Throwable;)V"); 247 static jmethodID ctor2 = env->GetMethodID(JniConstants::errnoExceptionClass, 248 "<init>", "(Ljava/lang/String;I)V"); 249 throwException(env, JniConstants::errnoExceptionClass, ctor3, ctor2, functionName, error); 250} 251 252static void throwGaiException(JNIEnv* env, const char* functionName, int error) { 253 // Cache the methods ids before we throw, so we don't call GetMethodID with a pending exception. 254 static jmethodID ctor3 = env->GetMethodID(JniConstants::gaiExceptionClass, "<init>", 255 "(Ljava/lang/String;ILjava/lang/Throwable;)V"); 256 static jmethodID ctor2 = env->GetMethodID(JniConstants::gaiExceptionClass, "<init>", 257 "(Ljava/lang/String;I)V"); 258 if (errno != 0) { 259 // EAI_SYSTEM should mean "look at errno instead", but both glibc and bionic seem to 260 // mess this up. In particular, if you don't have INTERNET permission, errno will be EACCES 261 // but you'll get EAI_NONAME or EAI_NODATA. So we want our GaiException to have a 262 // potentially-relevant ErrnoException as its cause even if error != EAI_SYSTEM. 263 // http://code.google.com/p/android/issues/detail?id=15722 264 throwErrnoException(env, functionName); 265 // Deliberately fall through to throw another exception... 266 } 267 throwException(env, JniConstants::gaiExceptionClass, ctor3, ctor2, functionName, error); 268} 269 270template <typename rc_t> 271static rc_t throwIfMinusOne(JNIEnv* env, const char* name, rc_t rc) { 272 if (rc == rc_t(-1)) { 273 throwErrnoException(env, name); 274 } 275 return rc; 276} 277 278template <typename ScopedT> 279class IoVec { 280public: 281 IoVec(JNIEnv* env, size_t bufferCount) : mEnv(env), mBufferCount(bufferCount) { 282 } 283 284 bool init(jobjectArray javaBuffers, jintArray javaOffsets, jintArray javaByteCounts) { 285 // We can't delete our local references until after the I/O, so make sure we have room. 286 if (mEnv->PushLocalFrame(mBufferCount + 16) < 0) { 287 return false; 288 } 289 ScopedIntArrayRO offsets(mEnv, javaOffsets); 290 if (offsets.get() == NULL) { 291 return false; 292 } 293 ScopedIntArrayRO byteCounts(mEnv, javaByteCounts); 294 if (byteCounts.get() == NULL) { 295 return false; 296 } 297 // TODO: Linux actually has a 1024 buffer limit. glibc works around this, and we should too. 298 // TODO: you can query the limit at runtime with sysconf(_SC_IOV_MAX). 299 for (size_t i = 0; i < mBufferCount; ++i) { 300 jobject buffer = mEnv->GetObjectArrayElement(javaBuffers, i); // We keep this local ref. 301 mScopedBuffers.push_back(new ScopedT(mEnv, buffer)); 302 jbyte* ptr = const_cast<jbyte*>(mScopedBuffers.back()->get()); 303 if (ptr == NULL) { 304 return false; 305 } 306 struct iovec iov; 307 iov.iov_base = reinterpret_cast<void*>(ptr + offsets[i]); 308 iov.iov_len = byteCounts[i]; 309 mIoVec.push_back(iov); 310 } 311 return true; 312 } 313 314 ~IoVec() { 315 for (size_t i = 0; i < mScopedBuffers.size(); ++i) { 316 delete mScopedBuffers[i]; 317 } 318 mEnv->PopLocalFrame(NULL); 319 } 320 321 iovec* get() { 322 return &mIoVec[0]; 323 } 324 325 size_t size() { 326 return mBufferCount; 327 } 328 329private: 330 JNIEnv* mEnv; 331 size_t mBufferCount; 332 std::vector<iovec> mIoVec; 333 std::vector<ScopedT*> mScopedBuffers; 334}; 335 336/** 337 * Returns a jbyteArray containing the sockaddr_un.sun_path from ss. As per unix(7) sa_len should be 338 * the length of ss as returned by getsockname(2), getpeername(2), or accept(2). 339 * If the returned array is of length 0 the sockaddr_un refers to an unnamed socket. 340 * A null pointer is returned in the event of an error. See unix(7) for more information. 341 */ 342static jbyteArray getUnixSocketPath(JNIEnv* env, const sockaddr_storage& ss, 343 const socklen_t& sa_len) { 344 if (ss.ss_family != AF_UNIX) { 345 jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException", 346 "getUnixSocketPath unsupported ss_family: %i", ss.ss_family); 347 return NULL; 348 } 349 350 const struct sockaddr_un* un_addr = reinterpret_cast<const struct sockaddr_un*>(&ss); 351 // The length of sun_path is sa_len minus the length of the overhead (ss_family). 352 // See unix(7) for details. This calculation must match that of socket_make_sockaddr_un() in 353 // socket_local_client.c and javaUnixSocketAddressToSockaddr() to interoperate. 354 size_t pathLength = sa_len - offsetof(struct sockaddr_un, sun_path); 355 356 jbyteArray javaSunPath = env->NewByteArray(pathLength); 357 if (javaSunPath == NULL) { 358 return NULL; 359 } 360 361 if (pathLength > 0) { 362 env->SetByteArrayRegion(javaSunPath, 0, pathLength, 363 reinterpret_cast<const jbyte*>(&un_addr->sun_path)); 364 } 365 return javaSunPath; 366} 367 368static jobject makeSocketAddress(JNIEnv* env, const sockaddr_storage& ss, const socklen_t sa_len) { 369 if (ss.ss_family == AF_INET || ss.ss_family == AF_INET6) { 370 jint port; 371 jobject inetAddress = sockaddrToInetAddress(env, ss, &port); 372 if (inetAddress == NULL) { 373 return NULL; // Exception already thrown. 374 } 375 static jmethodID ctor = env->GetMethodID(JniConstants::inetSocketAddressClass, 376 "<init>", "(Ljava/net/InetAddress;I)V"); 377 if (ctor == NULL) { 378 return NULL; 379 } 380 return env->NewObject(JniConstants::inetSocketAddressClass, ctor, inetAddress, port); 381 } else if (ss.ss_family == AF_UNIX) { 382 static jmethodID ctor = env->GetMethodID(JniConstants::unixSocketAddressClass, 383 "<init>", "([B)V"); 384 if (ctor == NULL) { 385 return NULL; 386 } 387 jbyteArray javaSunPath = getUnixSocketPath(env, ss, sa_len); 388 if (!javaSunPath) { 389 return NULL; 390 } 391 return env->NewObject(JniConstants::unixSocketAddressClass, ctor, javaSunPath); 392 } else if (ss.ss_family == AF_NETLINK) { 393 const struct sockaddr_nl* nl_addr = reinterpret_cast<const struct sockaddr_nl*>(&ss); 394 static jmethodID ctor = env->GetMethodID(JniConstants::netlinkSocketAddressClass, 395 "<init>", "(II)V"); 396 if (ctor == NULL) { 397 return NULL; 398 } 399 return env->NewObject(JniConstants::netlinkSocketAddressClass, ctor, 400 static_cast<jint>(nl_addr->nl_pid), 401 static_cast<jint>(nl_addr->nl_groups)); 402 } else if (ss.ss_family == AF_PACKET) { 403 const struct sockaddr_ll* sll = reinterpret_cast<const struct sockaddr_ll*>(&ss); 404 static jmethodID ctor = env->GetMethodID(JniConstants::packetSocketAddressClass, 405 "<init>", "(SISB[B)V"); 406 if (ctor == NULL) { 407 return NULL; 408 } 409 ScopedLocalRef<jbyteArray> byteArray(env, env->NewByteArray(sll->sll_halen)); 410 if (byteArray.get() == NULL) { 411 return NULL; 412 } 413 env->SetByteArrayRegion(byteArray.get(), 0, sll->sll_halen, 414 reinterpret_cast<const jbyte*>(sll->sll_addr)); 415 jobject packetSocketAddress = env->NewObject(JniConstants::packetSocketAddressClass, ctor, 416 static_cast<jshort>(ntohs(sll->sll_protocol)), 417 static_cast<jint>(sll->sll_ifindex), 418 static_cast<jshort>(sll->sll_hatype), 419 static_cast<jbyte>(sll->sll_pkttype), 420 byteArray.get()); 421 return packetSocketAddress; 422 } 423 jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException", "unsupported ss_family: %d", 424 ss.ss_family); 425 return NULL; 426} 427 428static jobject makeStructPasswd(JNIEnv* env, const struct passwd& pw) { 429 TO_JAVA_STRING(pw_name, pw.pw_name); 430 TO_JAVA_STRING(pw_dir, pw.pw_dir); 431 TO_JAVA_STRING(pw_shell, pw.pw_shell); 432 static jmethodID ctor = env->GetMethodID(JniConstants::structPasswdClass, "<init>", 433 "(Ljava/lang/String;IILjava/lang/String;Ljava/lang/String;)V"); 434 if (ctor == NULL) { 435 return NULL; 436 } 437 return env->NewObject(JniConstants::structPasswdClass, ctor, 438 pw_name, static_cast<jint>(pw.pw_uid), static_cast<jint>(pw.pw_gid), pw_dir, pw_shell); 439} 440 441static jobject makeStructTimespec(JNIEnv* env, const struct timespec& ts) { 442 static jmethodID ctor = env->GetMethodID(JniConstants::structTimespecClass, "<init>", 443 "(JJ)V"); 444 if (ctor == NULL) { 445 return NULL; 446 } 447 return env->NewObject(JniConstants::structTimespecClass, ctor, 448 static_cast<jlong>(ts.tv_sec), static_cast<jlong>(ts.tv_nsec)); 449} 450 451static jobject makeStructStat(JNIEnv* env, const struct stat64& sb) { 452 static jmethodID ctor = env->GetMethodID(JniConstants::structStatClass, "<init>", 453 "(JJIJIIJJLandroid/system/StructTimespec;Landroid/system/StructTimespec;Landroid/system/StructTimespec;JJ)V"); 454 if (ctor == NULL) { 455 return NULL; 456 } 457 458 jobject atim_timespec = makeStructTimespec(env, sb.st_atim); 459 if (atim_timespec == NULL) { 460 return NULL; 461 } 462 jobject mtim_timespec = makeStructTimespec(env, sb.st_mtim); 463 if (mtim_timespec == NULL) { 464 return NULL; 465 } 466 jobject ctim_timespec = makeStructTimespec(env, sb.st_ctim); 467 if (ctim_timespec == NULL) { 468 return NULL; 469 } 470 471 return env->NewObject(JniConstants::structStatClass, ctor, 472 static_cast<jlong>(sb.st_dev), static_cast<jlong>(sb.st_ino), 473 static_cast<jint>(sb.st_mode), static_cast<jlong>(sb.st_nlink), 474 static_cast<jint>(sb.st_uid), static_cast<jint>(sb.st_gid), 475 static_cast<jlong>(sb.st_rdev), static_cast<jlong>(sb.st_size), 476 atim_timespec, mtim_timespec, ctim_timespec, 477 static_cast<jlong>(sb.st_blksize), static_cast<jlong>(sb.st_blocks)); 478} 479 480static jobject makeStructStatVfs(JNIEnv* env, const struct statvfs& sb) { 481 static jmethodID ctor = env->GetMethodID(JniConstants::structStatVfsClass, "<init>", 482 "(JJJJJJJJJJJ)V"); 483 if (ctor == NULL) { 484 return NULL; 485 } 486 487 return env->NewObject(JniConstants::structStatVfsClass, ctor, 488 static_cast<jlong>(sb.f_bsize), 489 static_cast<jlong>(sb.f_frsize), 490 static_cast<jlong>(sb.f_blocks), 491 static_cast<jlong>(sb.f_bfree), 492 static_cast<jlong>(sb.f_bavail), 493 static_cast<jlong>(sb.f_files), 494 static_cast<jlong>(sb.f_ffree), 495 static_cast<jlong>(sb.f_favail), 496 static_cast<jlong>(sb.f_fsid), 497 static_cast<jlong>(sb.f_flag), 498 static_cast<jlong>(sb.f_namemax)); 499} 500 501static jobject makeStructLinger(JNIEnv* env, const struct linger& l) { 502 static jmethodID ctor = env->GetMethodID(JniConstants::structLingerClass, "<init>", "(II)V"); 503 if (ctor == NULL) { 504 return NULL; 505 } 506 return env->NewObject(JniConstants::structLingerClass, ctor, l.l_onoff, l.l_linger); 507} 508 509static jobject makeStructTimeval(JNIEnv* env, const struct timeval& tv) { 510 static jmethodID ctor = env->GetMethodID(JniConstants::structTimevalClass, "<init>", "(JJ)V"); 511 if (ctor == NULL) { 512 return NULL; 513 } 514 return env->NewObject(JniConstants::structTimevalClass, ctor, 515 static_cast<jlong>(tv.tv_sec), static_cast<jlong>(tv.tv_usec)); 516} 517 518static jobject makeStructUcred(JNIEnv* env, const struct ucred& u __unused) { 519 static jmethodID ctor = env->GetMethodID(JniConstants::structUcredClass, "<init>", "(III)V"); 520 if (ctor == NULL) { 521 return NULL; 522 } 523 return env->NewObject(JniConstants::structUcredClass, ctor, u.pid, u.uid, u.gid); 524} 525 526static jobject makeStructUtsname(JNIEnv* env, const struct utsname& buf) { 527 TO_JAVA_STRING(sysname, buf.sysname); 528 TO_JAVA_STRING(nodename, buf.nodename); 529 TO_JAVA_STRING(release, buf.release); 530 TO_JAVA_STRING(version, buf.version); 531 TO_JAVA_STRING(machine, buf.machine); 532 static jmethodID ctor = env->GetMethodID(JniConstants::structUtsnameClass, "<init>", 533 "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V"); 534 if (ctor == NULL) { 535 return NULL; 536 } 537 return env->NewObject(JniConstants::structUtsnameClass, ctor, 538 sysname, nodename, release, version, machine); 539}; 540 541static bool fillIfreq(JNIEnv* env, jstring javaInterfaceName, struct ifreq& req) { 542 ScopedUtfChars interfaceName(env, javaInterfaceName); 543 if (interfaceName.c_str() == NULL) { 544 return false; 545 } 546 memset(&req, 0, sizeof(req)); 547 strncpy(req.ifr_name, interfaceName.c_str(), sizeof(req.ifr_name)); 548 req.ifr_name[sizeof(req.ifr_name) - 1] = '\0'; 549 return true; 550} 551 552static bool fillUnixSocketAddress(JNIEnv* env, jobject javaUnixSocketAddress, 553 const sockaddr_storage& ss, const socklen_t& sa_len) { 554 if (javaUnixSocketAddress == NULL) { 555 return true; 556 } 557 jbyteArray javaSunPath = getUnixSocketPath(env, ss, sa_len); 558 if (!javaSunPath) { 559 return false; 560 } 561 562 static jfieldID sunPathFid = 563 env->GetFieldID(JniConstants::unixSocketAddressClass, "sun_path", "[B"); 564 env->SetObjectField(javaUnixSocketAddress, sunPathFid, javaSunPath); 565 return true; 566} 567 568static bool fillInetSocketAddress(JNIEnv* env, jobject javaInetSocketAddress, 569 const sockaddr_storage& ss) { 570 if (javaInetSocketAddress == NULL) { 571 return true; 572 } 573 // Fill out the passed-in InetSocketAddress with the sender's IP address and port number. 574 jint port; 575 jobject sender = sockaddrToInetAddress(env, ss, &port); 576 if (sender == NULL) { 577 return false; 578 } 579 static jfieldID holderFid = env->GetFieldID(JniConstants::inetSocketAddressClass, "holder", 580 "Ljava/net/InetSocketAddress$InetSocketAddressHolder;"); 581 jobject holder = env->GetObjectField(javaInetSocketAddress, holderFid); 582 583 static jfieldID addressFid = env->GetFieldID(JniConstants::inetSocketAddressHolderClass, 584 "addr", "Ljava/net/InetAddress;"); 585 static jfieldID portFid = env->GetFieldID(JniConstants::inetSocketAddressHolderClass, "port", "I"); 586 env->SetObjectField(holder, addressFid, sender); 587 env->SetIntField(holder, portFid, port); 588 return true; 589} 590 591static bool fillSocketAddress(JNIEnv* env, jobject javaSocketAddress, const sockaddr_storage& ss, 592 const socklen_t& sa_len) { 593 if (javaSocketAddress == NULL) { 594 return true; 595 } 596 597 if (env->IsInstanceOf(javaSocketAddress, JniConstants::inetSocketAddressClass)) { 598 return fillInetSocketAddress(env, javaSocketAddress, ss); 599 } else if (env->IsInstanceOf(javaSocketAddress, JniConstants::unixSocketAddressClass)) { 600 return fillUnixSocketAddress(env, javaSocketAddress, ss, sa_len); 601 } 602 jniThrowException(env, "java/lang/UnsupportedOperationException", 603 "unsupported SocketAddress subclass"); 604 return false; 605 606} 607 608static void javaInetSocketAddressToInetAddressAndPort( 609 JNIEnv* env, jobject javaInetSocketAddress, jobject& javaInetAddress, jint& port) { 610 static jfieldID holderFid = env->GetFieldID(JniConstants::inetSocketAddressClass, "holder", 611 "Ljava/net/InetSocketAddress$InetSocketAddressHolder;"); 612 jobject holder = env->GetObjectField(javaInetSocketAddress, holderFid); 613 614 static jfieldID addressFid = env->GetFieldID( 615 JniConstants::inetSocketAddressHolderClass, "addr", "Ljava/net/InetAddress;"); 616 static jfieldID portFid = env->GetFieldID(JniConstants::inetSocketAddressHolderClass, "port", "I"); 617 618 javaInetAddress = env->GetObjectField(holder, addressFid); 619 port = env->GetIntField(holder, portFid); 620} 621 622static bool javaInetSocketAddressToSockaddr( 623 JNIEnv* env, jobject javaSocketAddress, sockaddr_storage& ss, socklen_t& sa_len) { 624 jobject javaInetAddress; 625 jint port; 626 javaInetSocketAddressToInetAddressAndPort(env, javaSocketAddress, javaInetAddress, port); 627 return inetAddressToSockaddr(env, javaInetAddress, port, ss, sa_len); 628} 629 630static bool javaNetlinkSocketAddressToSockaddr( 631 JNIEnv* env, jobject javaSocketAddress, sockaddr_storage& ss, socklen_t& sa_len) { 632 static jfieldID nlPidFid = env->GetFieldID( 633 JniConstants::netlinkSocketAddressClass, "nlPortId", "I"); 634 static jfieldID nlGroupsFid = env->GetFieldID( 635 JniConstants::netlinkSocketAddressClass, "nlGroupsMask", "I"); 636 637 sockaddr_nl *nlAddr = reinterpret_cast<sockaddr_nl *>(&ss); 638 nlAddr->nl_family = AF_NETLINK; 639 nlAddr->nl_pid = env->GetIntField(javaSocketAddress, nlPidFid); 640 nlAddr->nl_groups = env->GetIntField(javaSocketAddress, nlGroupsFid); 641 sa_len = sizeof(sockaddr_nl); 642 return true; 643} 644 645static bool javaUnixSocketAddressToSockaddr( 646 JNIEnv* env, jobject javaUnixSocketAddress, sockaddr_storage& ss, socklen_t& sa_len) { 647 static jfieldID sunPathFid = env->GetFieldID( 648 JniConstants::unixSocketAddressClass, "sun_path", "[B"); 649 650 struct sockaddr_un* un_addr = reinterpret_cast<struct sockaddr_un*>(&ss); 651 memset (un_addr, 0, sizeof(sockaddr_un)); 652 un_addr->sun_family = AF_UNIX; 653 654 jbyteArray javaSunPath = (jbyteArray) env->GetObjectField(javaUnixSocketAddress, sunPathFid); 655 jsize pathLength = env->GetArrayLength(javaSunPath); 656 if ((size_t) pathLength > sizeof(sockaddr_un::sun_path)) { 657 jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException", 658 "sun_path too long: max=%i, is=%i", 659 sizeof(sockaddr_un::sun_path), pathLength); 660 return false; 661 } 662 env->GetByteArrayRegion(javaSunPath, 0, pathLength, (jbyte*) un_addr->sun_path); 663 // sa_len is sun_path plus the length of the overhead (ss_family_t). See unix(7) for 664 // details. This calculation must match that of socket_make_sockaddr_un() in 665 // socket_local_client.c and getUnixSocketPath() to interoperate. 666 sa_len = offsetof(struct sockaddr_un, sun_path) + pathLength; 667 return true; 668} 669 670static bool javaPacketSocketAddressToSockaddr( 671 JNIEnv* env, jobject javaSocketAddress, sockaddr_storage& ss, socklen_t& sa_len) { 672 static jfieldID protocolFid = env->GetFieldID( 673 JniConstants::packetSocketAddressClass, "sll_protocol", "S"); 674 static jfieldID ifindexFid = env->GetFieldID( 675 JniConstants::packetSocketAddressClass, "sll_ifindex", "I"); 676 static jfieldID hatypeFid = env->GetFieldID( 677 JniConstants::packetSocketAddressClass, "sll_hatype", "S"); 678 static jfieldID pkttypeFid = env->GetFieldID( 679 JniConstants::packetSocketAddressClass, "sll_pkttype", "B"); 680 static jfieldID addrFid = env->GetFieldID( 681 JniConstants::packetSocketAddressClass, "sll_addr", "[B"); 682 683 sockaddr_ll *sll = reinterpret_cast<sockaddr_ll *>(&ss); 684 sll->sll_family = AF_PACKET; 685 sll->sll_protocol = htons(env->GetShortField(javaSocketAddress, protocolFid)); 686 sll->sll_ifindex = env->GetIntField(javaSocketAddress, ifindexFid); 687 sll->sll_hatype = env->GetShortField(javaSocketAddress, hatypeFid); 688 sll->sll_pkttype = env->GetByteField(javaSocketAddress, pkttypeFid); 689 690 jbyteArray sllAddr = (jbyteArray) env->GetObjectField(javaSocketAddress, addrFid); 691 if (sllAddr == NULL) { 692 sll->sll_halen = 0; 693 memset(&sll->sll_addr, 0, sizeof(sll->sll_addr)); 694 } else { 695 jsize len = env->GetArrayLength(sllAddr); 696 if ((size_t) len > sizeof(sll->sll_addr)) { 697 len = sizeof(sll->sll_addr); 698 } 699 sll->sll_halen = len; 700 env->GetByteArrayRegion(sllAddr, 0, len, (jbyte*) sll->sll_addr); 701 } 702 sa_len = sizeof(sockaddr_ll); 703 return true; 704} 705 706static bool javaSocketAddressToSockaddr( 707 JNIEnv* env, jobject javaSocketAddress, sockaddr_storage& ss, socklen_t& sa_len) { 708 if (javaSocketAddress == NULL) { 709 jniThrowNullPointerException(env, NULL); 710 return false; 711 } 712 713 if (env->IsInstanceOf(javaSocketAddress, JniConstants::netlinkSocketAddressClass)) { 714 return javaNetlinkSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len); 715 } else if (env->IsInstanceOf(javaSocketAddress, JniConstants::inetSocketAddressClass)) { 716 return javaInetSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len); 717 } else if (env->IsInstanceOf(javaSocketAddress, JniConstants::packetSocketAddressClass)) { 718 return javaPacketSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len); 719 } else if (env->IsInstanceOf(javaSocketAddress, JniConstants::unixSocketAddressClass)) { 720 return javaUnixSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len); 721 } 722 jniThrowException(env, "java/lang/UnsupportedOperationException", 723 "unsupported SocketAddress subclass"); 724 return false; 725} 726 727static jobject doStat(JNIEnv* env, jstring javaPath, bool isLstat) { 728 ScopedUtfChars path(env, javaPath); 729 if (path.c_str() == NULL) { 730 return NULL; 731 } 732 struct stat64 sb; 733 int rc = isLstat ? TEMP_FAILURE_RETRY(lstat64(path.c_str(), &sb)) 734 : TEMP_FAILURE_RETRY(stat64(path.c_str(), &sb)); 735 if (rc == -1) { 736 throwErrnoException(env, isLstat ? "lstat" : "stat"); 737 return NULL; 738 } 739 return makeStructStat(env, sb); 740} 741 742static jobject doGetSockName(JNIEnv* env, jobject javaFd, bool is_sockname) { 743 int fd = jniGetFDFromFileDescriptor(env, javaFd); 744 sockaddr_storage ss; 745 sockaddr* sa = reinterpret_cast<sockaddr*>(&ss); 746 socklen_t byteCount = sizeof(ss); 747 memset(&ss, 0, byteCount); 748 int rc = is_sockname ? TEMP_FAILURE_RETRY(getsockname(fd, sa, &byteCount)) 749 : TEMP_FAILURE_RETRY(getpeername(fd, sa, &byteCount)); 750 if (rc == -1) { 751 throwErrnoException(env, is_sockname ? "getsockname" : "getpeername"); 752 return NULL; 753 } 754 return makeSocketAddress(env, ss, byteCount); 755} 756 757class Passwd { 758public: 759 explicit Passwd(JNIEnv* env) : mEnv(env), mResult(NULL) { 760 mBufferSize = sysconf(_SC_GETPW_R_SIZE_MAX); 761 mBuffer.reset(new char[mBufferSize]); 762 } 763 764 jobject getpwnam(const char* name) { 765 return process("getpwnam_r", getpwnam_r(name, &mPwd, mBuffer.get(), mBufferSize, &mResult)); 766 } 767 768 jobject getpwuid(uid_t uid) { 769 return process("getpwuid_r", getpwuid_r(uid, &mPwd, mBuffer.get(), mBufferSize, &mResult)); 770 } 771 772 struct passwd* get() { 773 return mResult; 774 } 775 776private: 777 jobject process(const char* syscall, int error) { 778 if (mResult == NULL) { 779 errno = error; 780 throwErrnoException(mEnv, syscall); 781 return NULL; 782 } 783 return makeStructPasswd(mEnv, *mResult); 784 } 785 786 JNIEnv* mEnv; 787 std::unique_ptr<char[]> mBuffer; 788 size_t mBufferSize; 789 struct passwd mPwd; 790 struct passwd* mResult; 791}; 792 793static void AssertException(JNIEnv* env) { 794 if (env->ExceptionCheck() == JNI_FALSE) { 795 env->FatalError("Expected exception"); 796 } 797} 798 799// Note for capabilities functions: 800// We assume the calls are rare enough that it does not make sense to cache class objects. The 801// advantage is lower maintenance burden. 802 803static bool ReadStructCapUserHeader( 804 JNIEnv* env, jobject java_header, __user_cap_header_struct* c_header) { 805 if (java_header == nullptr) { 806 jniThrowNullPointerException(env, "header is null"); 807 return false; 808 } 809 810 ScopedLocalRef<jclass> header_class(env, env->FindClass("android/system/StructCapUserHeader")); 811 if (header_class.get() == nullptr) { 812 return false; 813 } 814 815 { 816 static jfieldID version_fid = env->GetFieldID(header_class.get(), "version", "I"); 817 if (version_fid == nullptr) { 818 return false; 819 } 820 c_header->version = env->GetIntField(java_header, version_fid); 821 } 822 823 { 824 static jfieldID pid_fid = env->GetFieldID(header_class.get(), "pid", "I"); 825 if (pid_fid == nullptr) { 826 return false; 827 } 828 c_header->pid = env->GetIntField(java_header, pid_fid); 829 } 830 831 return true; 832} 833 834static void SetStructCapUserHeaderVersion( 835 JNIEnv* env, jobject java_header, __user_cap_header_struct* c_header) { 836 ScopedLocalRef<jclass> header_class(env, env->FindClass("android/system/StructCapUserHeader")); 837 if (header_class.get() == nullptr) { 838 env->ExceptionClear(); 839 return; 840 } 841 842 static jfieldID version_fid = env->GetFieldID(header_class.get(), "version", "I"); 843 if (version_fid == nullptr) { 844 env->ExceptionClear(); 845 return; 846 } 847 env->SetIntField(java_header, version_fid, c_header->version); 848} 849 850static jobject CreateStructCapUserData( 851 JNIEnv* env, jclass data_class, __user_cap_data_struct* c_data) { 852 if (c_data == nullptr) { 853 // Should not happen. 854 jniThrowNullPointerException(env, "data is null"); 855 return nullptr; 856 } 857 858 static jmethodID data_cons = env->GetMethodID(data_class, "<init>", "(III)V"); 859 if (data_cons == nullptr) { 860 return nullptr; 861 } 862 863 jint e = static_cast<jint>(c_data->effective); 864 jint p = static_cast<jint>(c_data->permitted); 865 jint i = static_cast<jint>(c_data->inheritable); 866 return env->NewObject(data_class, data_cons, e, p, i); 867} 868 869static bool ReadStructCapUserData(JNIEnv* env, jobject java_data, __user_cap_data_struct* c_data) { 870 if (java_data == nullptr) { 871 jniThrowNullPointerException(env, "data is null"); 872 return false; 873 } 874 875 ScopedLocalRef<jclass> data_class(env, env->FindClass("android/system/StructCapUserData")); 876 if (data_class.get() == nullptr) { 877 return false; 878 } 879 880 { 881 static jfieldID effective_fid = env->GetFieldID(data_class.get(), "effective", "I"); 882 if (effective_fid == nullptr) { 883 return false; 884 } 885 c_data->effective = env->GetIntField(java_data, effective_fid); 886 } 887 888 { 889 static jfieldID permitted_fid = env->GetFieldID(data_class.get(), "permitted", "I"); 890 if (permitted_fid == nullptr) { 891 return false; 892 } 893 c_data->permitted = env->GetIntField(java_data, permitted_fid); 894 } 895 896 897 { 898 static jfieldID inheritable_fid = env->GetFieldID(data_class.get(), "inheritable", "I"); 899 if (inheritable_fid == nullptr) { 900 return false; 901 } 902 c_data->inheritable = env->GetIntField(java_data, inheritable_fid); 903 } 904 905 return true; 906} 907 908static constexpr size_t kMaxCapUserDataLength = 2U; 909#ifdef _LINUX_CAPABILITY_VERSION_1 910static_assert(kMaxCapUserDataLength >= _LINUX_CAPABILITY_U32S_1, "Length too small."); 911#endif 912#ifdef _LINUX_CAPABILITY_VERSION_2 913static_assert(kMaxCapUserDataLength >= _LINUX_CAPABILITY_U32S_2, "Length too small."); 914#endif 915#ifdef _LINUX_CAPABILITY_VERSION_3 916static_assert(kMaxCapUserDataLength >= _LINUX_CAPABILITY_U32S_3, "Length too small."); 917#endif 918#ifdef _LINUX_CAPABILITY_VERSION_4 919static_assert(false, "Unsupported capability version, please update."); 920#endif 921 922static size_t GetCapUserDataLength(uint32_t version) { 923#ifdef _LINUX_CAPABILITY_VERSION_1 924 if (version == _LINUX_CAPABILITY_VERSION_1) { 925 return _LINUX_CAPABILITY_U32S_1; 926 } 927#endif 928#ifdef _LINUX_CAPABILITY_VERSION_2 929 if (version == _LINUX_CAPABILITY_VERSION_2) { 930 return _LINUX_CAPABILITY_U32S_2; 931 } 932#endif 933#ifdef _LINUX_CAPABILITY_VERSION_3 934 if (version == _LINUX_CAPABILITY_VERSION_3) { 935 return _LINUX_CAPABILITY_U32S_3; 936 } 937#endif 938 return 0; 939} 940 941static jobject Linux_accept(JNIEnv* env, jobject, jobject javaFd, jobject javaSocketAddress) { 942 sockaddr_storage ss; 943 socklen_t sl = sizeof(ss); 944 memset(&ss, 0, sizeof(ss)); 945 sockaddr* peer = (javaSocketAddress != NULL) ? reinterpret_cast<sockaddr*>(&ss) : NULL; 946 socklen_t* peerLength = (javaSocketAddress != NULL) ? &sl : 0; 947 jint clientFd = NET_FAILURE_RETRY(env, int, accept, javaFd, peer, peerLength); 948 if (clientFd == -1 || !fillSocketAddress(env, javaSocketAddress, ss, *peerLength)) { 949 close(clientFd); 950 return NULL; 951 } 952 return (clientFd != -1) ? jniCreateFileDescriptor(env, clientFd) : NULL; 953} 954 955static jboolean Linux_access(JNIEnv* env, jobject, jstring javaPath, jint mode) { 956 ScopedUtfChars path(env, javaPath); 957 if (path.c_str() == NULL) { 958 return JNI_FALSE; 959 } 960 int rc = TEMP_FAILURE_RETRY(access(path.c_str(), mode)); 961 if (rc == -1) { 962 throwErrnoException(env, "access"); 963 } 964 return (rc == 0); 965} 966 967static void Linux_bind(JNIEnv* env, jobject, jobject javaFd, jobject javaAddress, jint port) { 968 // We don't need the return value because we'll already have thrown. 969 (void) NET_IPV4_FALLBACK(env, int, bind, javaFd, javaAddress, port, NULL_ADDR_FORBIDDEN); 970} 971 972static void Linux_bindSocketAddress( 973 JNIEnv* env, jobject, jobject javaFd, jobject javaSocketAddress) { 974 sockaddr_storage ss; 975 socklen_t sa_len; 976 if (!javaSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len)) { 977 return; // Exception already thrown. 978 } 979 980 const sockaddr* sa = reinterpret_cast<const sockaddr*>(&ss); 981 // We don't need the return value because we'll already have thrown. 982 (void) NET_FAILURE_RETRY(env, int, bind, javaFd, sa, sa_len); 983} 984 985static jobjectArray Linux_capget(JNIEnv* env, jobject, jobject header) { 986 // Convert Java header struct to kernel datastructure. 987 __user_cap_header_struct cap_header; 988 if (!ReadStructCapUserHeader(env, header, &cap_header)) { 989 AssertException(env); 990 return nullptr; 991 } 992 993 // Call capget. 994 __user_cap_data_struct cap_data[kMaxCapUserDataLength]; 995 if (capget(&cap_header, &cap_data[0]) == -1) { 996 // Check for EINVAL. In that case, mutate the header. 997 if (errno == EINVAL) { 998 int saved_errno = errno; 999 SetStructCapUserHeaderVersion(env, header, &cap_header); 1000 errno = saved_errno; 1001 } 1002 throwErrnoException(env, "capget"); 1003 return nullptr; 1004 } 1005 1006 // Create the result array. 1007 ScopedLocalRef<jclass> data_class(env, env->FindClass("android/system/StructCapUserData")); 1008 if (data_class.get() == nullptr) { 1009 return nullptr; 1010 } 1011 size_t result_size = GetCapUserDataLength(cap_header.version); 1012 ScopedLocalRef<jobjectArray> result( 1013 env, env->NewObjectArray(result_size, data_class.get(), nullptr)); 1014 if (result.get() == nullptr) { 1015 return nullptr; 1016 } 1017 // Translate the values we got. 1018 for (size_t i = 0; i < result_size; ++i) { 1019 ScopedLocalRef<jobject> value( 1020 env, CreateStructCapUserData(env, data_class.get(), &cap_data[i])); 1021 if (value.get() == nullptr) { 1022 AssertException(env); 1023 return nullptr; 1024 } 1025 env->SetObjectArrayElement(result.get(), i, value.get()); 1026 } 1027 return result.release(); 1028} 1029 1030static void Linux_capset( 1031 JNIEnv* env, jobject, jobject header, jobjectArray data) { 1032 // Convert Java header struct to kernel datastructure. 1033 __user_cap_header_struct cap_header; 1034 if (!ReadStructCapUserHeader(env, header, &cap_header)) { 1035 AssertException(env); 1036 return; 1037 } 1038 size_t result_size = GetCapUserDataLength(cap_header.version); 1039 // Ensure that the array has the expected length. 1040 if (env->GetArrayLength(data) != static_cast<jint>(result_size)) { 1041 jniThrowExceptionFmt(env, 1042 "java/lang/IllegalArgumentException", 1043 "Unsupported input length %d (expected %zu)", 1044 env->GetArrayLength(data), 1045 result_size); 1046 return; 1047 } 1048 1049 __user_cap_data_struct cap_data[kMaxCapUserDataLength]; 1050 // Translate the values we got. 1051 for (size_t i = 0; i < result_size; ++i) { 1052 ScopedLocalRef<jobject> value(env, env->GetObjectArrayElement(data, i)); 1053 if (!ReadStructCapUserData(env, value.get(), &cap_data[i])) { 1054 AssertException(env); 1055 return; 1056 } 1057 } 1058 1059 throwIfMinusOne(env, "capset", capset(&cap_header, &cap_data[0])); 1060} 1061 1062static void Linux_chmod(JNIEnv* env, jobject, jstring javaPath, jint mode) { 1063 ScopedUtfChars path(env, javaPath); 1064 if (path.c_str() == NULL) { 1065 return; 1066 } 1067 throwIfMinusOne(env, "chmod", TEMP_FAILURE_RETRY(chmod(path.c_str(), mode))); 1068} 1069 1070static void Linux_chown(JNIEnv* env, jobject, jstring javaPath, jint uid, jint gid) { 1071 ScopedUtfChars path(env, javaPath); 1072 if (path.c_str() == NULL) { 1073 return; 1074 } 1075 throwIfMinusOne(env, "chown", TEMP_FAILURE_RETRY(chown(path.c_str(), uid, gid))); 1076} 1077 1078static void Linux_close(JNIEnv* env, jobject, jobject javaFd) { 1079 // Get the FileDescriptor's 'fd' field and clear it. 1080 // We need to do this before we can throw an IOException (http://b/3222087). 1081 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1082 jniSetFileDescriptorOfFD(env, javaFd, -1); 1083 1084 // Even if close(2) fails with EINTR, the fd will have been closed. 1085 // Using TEMP_FAILURE_RETRY will either lead to EBADF or closing someone else's fd. 1086 // http://lkml.indiana.edu/hypermail/linux/kernel/0509.1/0877.html 1087 throwIfMinusOne(env, "close", close(fd)); 1088} 1089 1090static void Linux_connect(JNIEnv* env, jobject, jobject javaFd, jobject javaAddress, jint port) { 1091 (void) NET_IPV4_FALLBACK(env, int, connect, javaFd, javaAddress, port, NULL_ADDR_FORBIDDEN); 1092} 1093 1094static void Linux_connectSocketAddress( 1095 JNIEnv* env, jobject, jobject javaFd, jobject javaSocketAddress) { 1096 sockaddr_storage ss; 1097 socklen_t sa_len; 1098 if (!javaSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len)) { 1099 return; // Exception already thrown. 1100 } 1101 1102 const sockaddr* sa = reinterpret_cast<const sockaddr*>(&ss); 1103 // We don't need the return value because we'll already have thrown. 1104 (void) NET_FAILURE_RETRY(env, int, connect, javaFd, sa, sa_len); 1105} 1106 1107static jobject Linux_dup(JNIEnv* env, jobject, jobject javaOldFd) { 1108 int oldFd = jniGetFDFromFileDescriptor(env, javaOldFd); 1109 int newFd = throwIfMinusOne(env, "dup", TEMP_FAILURE_RETRY(dup(oldFd))); 1110 return (newFd != -1) ? jniCreateFileDescriptor(env, newFd) : NULL; 1111} 1112 1113static jobject Linux_dup2(JNIEnv* env, jobject, jobject javaOldFd, jint newFd) { 1114 int oldFd = jniGetFDFromFileDescriptor(env, javaOldFd); 1115 int fd = throwIfMinusOne(env, "dup2", TEMP_FAILURE_RETRY(dup2(oldFd, newFd))); 1116 return (fd != -1) ? jniCreateFileDescriptor(env, fd) : NULL; 1117} 1118 1119static jobjectArray Linux_environ(JNIEnv* env, jobject) { 1120 extern char** environ; // Standard, but not in any header file. 1121 return toStringArray(env, environ); 1122} 1123 1124static void Linux_execve(JNIEnv* env, jobject, jstring javaFilename, jobjectArray javaArgv, jobjectArray javaEnvp) { 1125 ScopedUtfChars path(env, javaFilename); 1126 if (path.c_str() == NULL) { 1127 return; 1128 } 1129 1130 ExecStrings argv(env, javaArgv); 1131 ExecStrings envp(env, javaEnvp); 1132 TEMP_FAILURE_RETRY(execve(path.c_str(), argv.get(), envp.get())); 1133 1134 throwErrnoException(env, "execve"); 1135} 1136 1137static void Linux_execv(JNIEnv* env, jobject, jstring javaFilename, jobjectArray javaArgv) { 1138 ScopedUtfChars path(env, javaFilename); 1139 if (path.c_str() == NULL) { 1140 return; 1141 } 1142 1143 ExecStrings argv(env, javaArgv); 1144 TEMP_FAILURE_RETRY(execv(path.c_str(), argv.get())); 1145 1146 throwErrnoException(env, "execv"); 1147} 1148 1149static void Linux_fchmod(JNIEnv* env, jobject, jobject javaFd, jint mode) { 1150 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1151 throwIfMinusOne(env, "fchmod", TEMP_FAILURE_RETRY(fchmod(fd, mode))); 1152} 1153 1154static void Linux_fchown(JNIEnv* env, jobject, jobject javaFd, jint uid, jint gid) { 1155 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1156 throwIfMinusOne(env, "fchown", TEMP_FAILURE_RETRY(fchown(fd, uid, gid))); 1157} 1158 1159static jint Linux_fcntlFlock(JNIEnv* env, jobject, jobject javaFd, jint cmd, jobject javaFlock) { 1160 static jfieldID typeFid = env->GetFieldID(JniConstants::structFlockClass, "l_type", "S"); 1161 static jfieldID whenceFid = env->GetFieldID(JniConstants::structFlockClass, "l_whence", "S"); 1162 static jfieldID startFid = env->GetFieldID(JniConstants::structFlockClass, "l_start", "J"); 1163 static jfieldID lenFid = env->GetFieldID(JniConstants::structFlockClass, "l_len", "J"); 1164 static jfieldID pidFid = env->GetFieldID(JniConstants::structFlockClass, "l_pid", "I"); 1165 1166 struct flock64 lock; 1167 memset(&lock, 0, sizeof(lock)); 1168 lock.l_type = env->GetShortField(javaFlock, typeFid); 1169 lock.l_whence = env->GetShortField(javaFlock, whenceFid); 1170 lock.l_start = env->GetLongField(javaFlock, startFid); 1171 lock.l_len = env->GetLongField(javaFlock, lenFid); 1172 lock.l_pid = env->GetIntField(javaFlock, pidFid); 1173 1174 int rc = IO_FAILURE_RETRY(env, int, fcntl, javaFd, cmd, &lock); 1175 if (rc != -1) { 1176 env->SetShortField(javaFlock, typeFid, lock.l_type); 1177 env->SetShortField(javaFlock, whenceFid, lock.l_whence); 1178 env->SetLongField(javaFlock, startFid, lock.l_start); 1179 env->SetLongField(javaFlock, lenFid, lock.l_len); 1180 env->SetIntField(javaFlock, pidFid, lock.l_pid); 1181 } 1182 return rc; 1183} 1184 1185static jint Linux_fcntlInt(JNIEnv* env, jobject, jobject javaFd, jint cmd, jint arg) { 1186 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1187 return throwIfMinusOne(env, "fcntl", TEMP_FAILURE_RETRY(fcntl(fd, cmd, arg))); 1188} 1189 1190static jint Linux_fcntlVoid(JNIEnv* env, jobject, jobject javaFd, jint cmd) { 1191 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1192 return throwIfMinusOne(env, "fcntl", TEMP_FAILURE_RETRY(fcntl(fd, cmd))); 1193} 1194 1195static void Linux_fdatasync(JNIEnv* env, jobject, jobject javaFd) { 1196 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1197 throwIfMinusOne(env, "fdatasync", TEMP_FAILURE_RETRY(fdatasync(fd))); 1198} 1199 1200static jobject Linux_fstat(JNIEnv* env, jobject, jobject javaFd) { 1201 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1202 struct stat64 sb; 1203 int rc = TEMP_FAILURE_RETRY(fstat64(fd, &sb)); 1204 if (rc == -1) { 1205 throwErrnoException(env, "fstat"); 1206 return NULL; 1207 } 1208 return makeStructStat(env, sb); 1209} 1210 1211static jobject Linux_fstatvfs(JNIEnv* env, jobject, jobject javaFd) { 1212 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1213 struct statvfs sb; 1214 int rc = TEMP_FAILURE_RETRY(fstatvfs(fd, &sb)); 1215 if (rc == -1) { 1216 throwErrnoException(env, "fstatvfs"); 1217 return NULL; 1218 } 1219 return makeStructStatVfs(env, sb); 1220} 1221 1222static void Linux_fsync(JNIEnv* env, jobject, jobject javaFd) { 1223 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1224 throwIfMinusOne(env, "fsync", TEMP_FAILURE_RETRY(fsync(fd))); 1225} 1226 1227static void Linux_ftruncate(JNIEnv* env, jobject, jobject javaFd, jlong length) { 1228 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1229 throwIfMinusOne(env, "ftruncate", TEMP_FAILURE_RETRY(ftruncate64(fd, length))); 1230} 1231 1232static jstring Linux_gai_strerror(JNIEnv* env, jobject, jint error) { 1233 return env->NewStringUTF(gai_strerror(error)); 1234} 1235 1236static jobjectArray Linux_android_getaddrinfo(JNIEnv* env, jobject, jstring javaNode, 1237 jobject javaHints, jint netId) { 1238 ScopedUtfChars node(env, javaNode); 1239 if (node.c_str() == NULL) { 1240 return NULL; 1241 } 1242 1243 static jfieldID flagsFid = env->GetFieldID(JniConstants::structAddrinfoClass, "ai_flags", "I"); 1244 static jfieldID familyFid = env->GetFieldID(JniConstants::structAddrinfoClass, "ai_family", "I"); 1245 static jfieldID socktypeFid = env->GetFieldID(JniConstants::structAddrinfoClass, "ai_socktype", "I"); 1246 static jfieldID protocolFid = env->GetFieldID(JniConstants::structAddrinfoClass, "ai_protocol", "I"); 1247 1248 addrinfo hints; 1249 memset(&hints, 0, sizeof(hints)); 1250 hints.ai_flags = env->GetIntField(javaHints, flagsFid); 1251 hints.ai_family = env->GetIntField(javaHints, familyFid); 1252 hints.ai_socktype = env->GetIntField(javaHints, socktypeFid); 1253 hints.ai_protocol = env->GetIntField(javaHints, protocolFid); 1254 1255 addrinfo* addressList = NULL; 1256 errno = 0; 1257 int rc = android_getaddrinfofornet(node.c_str(), NULL, &hints, netId, 0, &addressList); 1258 std::unique_ptr<addrinfo, addrinfo_deleter> addressListDeleter(addressList); 1259 if (rc != 0) { 1260 throwGaiException(env, "android_getaddrinfo", rc); 1261 return NULL; 1262 } 1263 1264 // Count results so we know how to size the output array. 1265 int addressCount = 0; 1266 for (addrinfo* ai = addressList; ai != NULL; ai = ai->ai_next) { 1267 if (ai->ai_family == AF_INET || ai->ai_family == AF_INET6) { 1268 ++addressCount; 1269 } else { 1270 ALOGE("android_getaddrinfo unexpected ai_family %i", ai->ai_family); 1271 } 1272 } 1273 if (addressCount == 0) { 1274 return NULL; 1275 } 1276 1277 // Prepare output array. 1278 jobjectArray result = env->NewObjectArray(addressCount, JniConstants::inetAddressClass, NULL); 1279 if (result == NULL) { 1280 return NULL; 1281 } 1282 1283 // Examine returned addresses one by one, save them in the output array. 1284 int index = 0; 1285 for (addrinfo* ai = addressList; ai != NULL; ai = ai->ai_next) { 1286 if (ai->ai_family != AF_INET && ai->ai_family != AF_INET6) { 1287 // Unknown address family. Skip this address. 1288 ALOGE("android_getaddrinfo unexpected ai_family %i", ai->ai_family); 1289 continue; 1290 } 1291 1292 // Convert each IP address into a Java byte array. 1293 sockaddr_storage& address = *reinterpret_cast<sockaddr_storage*>(ai->ai_addr); 1294 ScopedLocalRef<jobject> inetAddress(env, sockaddrToInetAddress(env, address, NULL)); 1295 if (inetAddress.get() == NULL) { 1296 return NULL; 1297 } 1298 env->SetObjectArrayElement(result, index, inetAddress.get()); 1299 ++index; 1300 } 1301 return result; 1302} 1303 1304static jint Linux_getegid(JNIEnv*, jobject) { 1305 return getegid(); 1306} 1307 1308static jint Linux_geteuid(JNIEnv*, jobject) { 1309 return geteuid(); 1310} 1311 1312static jint Linux_getgid(JNIEnv*, jobject) { 1313 return getgid(); 1314} 1315 1316static jstring Linux_getenv(JNIEnv* env, jobject, jstring javaName) { 1317 ScopedUtfChars name(env, javaName); 1318 if (name.c_str() == NULL) { 1319 return NULL; 1320 } 1321 return env->NewStringUTF(getenv(name.c_str())); 1322} 1323 1324static jstring Linux_getnameinfo(JNIEnv* env, jobject, jobject javaAddress, jint flags) { 1325 sockaddr_storage ss; 1326 socklen_t sa_len; 1327 if (!inetAddressToSockaddrVerbatim(env, javaAddress, 0, ss, sa_len)) { 1328 return NULL; 1329 } 1330 char buf[NI_MAXHOST]; // NI_MAXHOST is longer than INET6_ADDRSTRLEN. 1331 errno = 0; 1332 int rc = getnameinfo(reinterpret_cast<sockaddr*>(&ss), sa_len, buf, sizeof(buf), NULL, 0, flags); 1333 if (rc != 0) { 1334 throwGaiException(env, "getnameinfo", rc); 1335 return NULL; 1336 } 1337 return env->NewStringUTF(buf); 1338} 1339 1340static jobject Linux_getpeername(JNIEnv* env, jobject, jobject javaFd) { 1341 return doGetSockName(env, javaFd, false); 1342} 1343 1344static jint Linux_getpgid(JNIEnv* env, jobject, jint pid) { 1345 return throwIfMinusOne(env, "getpgid", TEMP_FAILURE_RETRY(getpgid(pid))); 1346} 1347 1348static jint Linux_getpid(JNIEnv*, jobject) { 1349 return TEMP_FAILURE_RETRY(getpid()); 1350} 1351 1352static jint Linux_getppid(JNIEnv*, jobject) { 1353 return TEMP_FAILURE_RETRY(getppid()); 1354} 1355 1356static jobject Linux_getpwnam(JNIEnv* env, jobject, jstring javaName) { 1357 ScopedUtfChars name(env, javaName); 1358 if (name.c_str() == NULL) { 1359 return NULL; 1360 } 1361 return Passwd(env).getpwnam(name.c_str()); 1362} 1363 1364static jobject Linux_getpwuid(JNIEnv* env, jobject, jint uid) { 1365 return Passwd(env).getpwuid(uid); 1366} 1367 1368static jobject Linux_getrlimit(JNIEnv* env, jobject, jint resource) { 1369 struct rlimit r; 1370 if (throwIfMinusOne(env, "getrlimit", TEMP_FAILURE_RETRY(getrlimit(resource, &r))) == -1) { 1371 return nullptr; 1372 } 1373 1374 ScopedLocalRef<jclass> rlimit_class(env, env->FindClass("android/system/StructRlimit")); 1375 jmethodID ctor = env->GetMethodID(rlimit_class.get(), "<init>", "(JJ)V"); 1376 if (ctor == NULL) { 1377 return NULL; 1378 } 1379 return env->NewObject(rlimit_class.get(), ctor, 1380 static_cast<jlong>(r.rlim_cur), 1381 static_cast<jlong>(r.rlim_max)); 1382} 1383 1384static jobject Linux_getsockname(JNIEnv* env, jobject, jobject javaFd) { 1385 return doGetSockName(env, javaFd, true); 1386} 1387 1388static jint Linux_getsockoptByte(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 1389 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1390 u_char result = 0; 1391 socklen_t size = sizeof(result); 1392 throwIfMinusOne(env, "getsockopt", TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &result, &size))); 1393 return result; 1394} 1395 1396static jobject Linux_getsockoptInAddr(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 1397 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1398 sockaddr_storage ss; 1399 memset(&ss, 0, sizeof(ss)); 1400 ss.ss_family = AF_INET; // This is only for the IPv4-only IP_MULTICAST_IF. 1401 sockaddr_in* sa = reinterpret_cast<sockaddr_in*>(&ss); 1402 socklen_t size = sizeof(sa->sin_addr); 1403 int rc = TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &sa->sin_addr, &size)); 1404 if (rc == -1) { 1405 throwErrnoException(env, "getsockopt"); 1406 return NULL; 1407 } 1408 return sockaddrToInetAddress(env, ss, NULL); 1409} 1410 1411static jint Linux_getsockoptInt(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 1412 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1413 jint result = 0; 1414 socklen_t size = sizeof(result); 1415 throwIfMinusOne(env, "getsockopt", TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &result, &size))); 1416 return result; 1417} 1418 1419static jobject Linux_getsockoptLinger(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 1420 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1421 struct linger l; 1422 socklen_t size = sizeof(l); 1423 memset(&l, 0, size); 1424 int rc = TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &l, &size)); 1425 if (rc == -1) { 1426 throwErrnoException(env, "getsockopt"); 1427 return NULL; 1428 } 1429 return makeStructLinger(env, l); 1430} 1431 1432static jobject Linux_getsockoptTimeval(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 1433 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1434 struct timeval tv; 1435 socklen_t size = sizeof(tv); 1436 memset(&tv, 0, size); 1437 int rc = TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &tv, &size)); 1438 if (rc == -1) { 1439 throwErrnoException(env, "getsockopt"); 1440 return NULL; 1441 } 1442 return makeStructTimeval(env, tv); 1443} 1444 1445static jobject Linux_getsockoptUcred(JNIEnv* env, jobject, jobject javaFd, jint level, jint option) { 1446 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1447 struct ucred u; 1448 socklen_t size = sizeof(u); 1449 memset(&u, 0, size); 1450 int rc = TEMP_FAILURE_RETRY(getsockopt(fd, level, option, &u, &size)); 1451 if (rc == -1) { 1452 throwErrnoException(env, "getsockopt"); 1453 return NULL; 1454 } 1455 return makeStructUcred(env, u); 1456} 1457 1458static jint Linux_gettid(JNIEnv* env __unused, jobject) { 1459#if defined(__BIONIC__) 1460 return TEMP_FAILURE_RETRY(gettid()); 1461#else 1462 return syscall(__NR_gettid); 1463#endif 1464} 1465 1466static jint Linux_getuid(JNIEnv*, jobject) { 1467 return getuid(); 1468} 1469 1470static jbyteArray Linux_getxattr(JNIEnv* env, jobject, jstring javaPath, 1471 jstring javaName) { 1472 ScopedUtfChars path(env, javaPath); 1473 if (path.c_str() == NULL) { 1474 return NULL; 1475 } 1476 ScopedUtfChars name(env, javaName); 1477 if (name.c_str() == NULL) { 1478 return NULL; 1479 } 1480 1481 while (true) { 1482 // Get the current size of the named extended attribute. 1483 ssize_t valueLength; 1484 if ((valueLength = getxattr(path.c_str(), name.c_str(), NULL, 0)) < 0) { 1485 throwErrnoException(env, "getxattr"); 1486 return NULL; 1487 } 1488 1489 // Create the actual byte array. 1490 std::vector<char> buf(valueLength); 1491 if ((valueLength = getxattr(path.c_str(), name.c_str(), buf.data(), valueLength)) < 0) { 1492 if (errno == ERANGE) { 1493 // The attribute value has changed since last getxattr call and buf no longer fits, 1494 // try again. 1495 continue; 1496 } 1497 throwErrnoException(env, "getxattr"); 1498 return NULL; 1499 } 1500 jbyteArray array = env->NewByteArray(valueLength); 1501 if (array == NULL) { 1502 return NULL; 1503 } 1504 env->SetByteArrayRegion(array, 0, valueLength, reinterpret_cast<const jbyte*>(buf.data())); 1505 return array; 1506 } 1507} 1508 1509static jobjectArray Linux_getifaddrs(JNIEnv* env, jobject) { 1510 static jmethodID ctor = env->GetMethodID(JniConstants::structIfaddrs, "<init>", 1511 "(Ljava/lang/String;ILjava/net/InetAddress;Ljava/net/InetAddress;Ljava/net/InetAddress;[B)V"); 1512 if (ctor == NULL) { 1513 return NULL; 1514 } 1515 1516 ifaddrs* ifaddr; 1517 int rc = TEMP_FAILURE_RETRY(getifaddrs(&ifaddr)); 1518 if (rc == -1) { 1519 throwErrnoException(env, "getifaddrs"); 1520 return NULL; 1521 } 1522 std::unique_ptr<ifaddrs, decltype(&freeifaddrs)> ifaddrPtr(ifaddr, freeifaddrs); 1523 1524 // Count results so we know how to size the output array. 1525 jint ifCount = 0; 1526 for (ifaddrs* ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) { 1527 ++ifCount; 1528 } 1529 1530 // Prepare output array. 1531 jobjectArray result = env->NewObjectArray(ifCount, JniConstants::structIfaddrs, NULL); 1532 if (result == NULL) { 1533 return NULL; 1534 } 1535 1536 // Traverse the list and populate the output array. 1537 int index = 0; 1538 for (ifaddrs* ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next, ++index) { 1539 TO_JAVA_STRING(name, ifa->ifa_name); 1540 jint flags = ifa->ifa_flags; 1541 sockaddr_storage* interfaceAddr = 1542 reinterpret_cast<sockaddr_storage*>(ifa->ifa_addr); 1543 sockaddr_storage* netmaskAddr = 1544 reinterpret_cast<sockaddr_storage*>(ifa->ifa_netmask); 1545 sockaddr_storage* broadAddr = 1546 reinterpret_cast<sockaddr_storage*>(ifa->ifa_broadaddr); 1547 1548 jobject addr, netmask, broad; 1549 jbyteArray hwaddr = NULL; 1550 if (interfaceAddr != NULL) { 1551 switch (interfaceAddr->ss_family) { 1552 case AF_INET: 1553 case AF_INET6: 1554 // IPv4 / IPv6. 1555 // interfaceAddr and netmaskAddr are never null. 1556 if ((addr = sockaddrToInetAddress(env, *interfaceAddr, NULL)) == NULL) { 1557 return NULL; 1558 } 1559 if ((netmask = sockaddrToInetAddress(env, *netmaskAddr, NULL)) == NULL) { 1560 return NULL; 1561 } 1562 if (broadAddr != NULL && (ifa->ifa_flags & IFF_BROADCAST)) { 1563 if ((broad = sockaddrToInetAddress(env, *broadAddr, NULL)) == NULL) { 1564 return NULL; 1565 } 1566 } else { 1567 broad = NULL; 1568 } 1569 break; 1570 case AF_PACKET: 1571 // Raw Interface. 1572 sockaddr_ll* sll = reinterpret_cast<sockaddr_ll*>(ifa->ifa_addr); 1573 1574 bool allZero = true; 1575 for (int i = 0; i < sll->sll_halen; ++i) { 1576 if (sll->sll_addr[i] != 0) { 1577 allZero = false; 1578 break; 1579 } 1580 } 1581 1582 if (!allZero) { 1583 hwaddr = env->NewByteArray(sll->sll_halen); 1584 if (hwaddr == NULL) { 1585 return NULL; 1586 } 1587 env->SetByteArrayRegion(hwaddr, 0, sll->sll_halen, 1588 reinterpret_cast<const jbyte*>(sll->sll_addr)); 1589 } 1590 addr = netmask = broad = NULL; 1591 break; 1592 } 1593 } else { 1594 // Preserve the entry even if the interface has no interface address. 1595 // http://b/29243557/ 1596 addr = netmask = broad = NULL; 1597 } 1598 1599 jobject o = env->NewObject(JniConstants::structIfaddrs, ctor, name, flags, addr, netmask, 1600 broad, hwaddr); 1601 if (o == NULL) { 1602 return NULL; 1603 } 1604 env->SetObjectArrayElement(result, index, o); 1605 } 1606 1607 return result; 1608} 1609 1610static jstring Linux_if_indextoname(JNIEnv* env, jobject, jint index) { 1611 char buf[IF_NAMESIZE]; 1612 char* name = if_indextoname(index, buf); 1613 // if_indextoname(3) returns NULL on failure, which will come out of NewStringUTF unscathed. 1614 // There's no useful information in errno, so we don't bother throwing. Callers can null-check. 1615 return env->NewStringUTF(name); 1616} 1617 1618static jint Linux_if_nametoindex(JNIEnv* env, jobject, jstring name) { 1619 ScopedUtfChars cname(env, name); 1620 if (cname.c_str() == NULL) { 1621 return 0; 1622 } 1623 1624 // There's no useful information in errno, so we don't bother throwing. Callers can zero-check. 1625 return if_nametoindex(cname.c_str()); 1626} 1627 1628static jobject Linux_inet_pton(JNIEnv* env, jobject, jint family, jstring javaName) { 1629 ScopedUtfChars name(env, javaName); 1630 if (name.c_str() == NULL) { 1631 return NULL; 1632 } 1633 sockaddr_storage ss; 1634 memset(&ss, 0, sizeof(ss)); 1635 // sockaddr_in and sockaddr_in6 are at the same address, so we can use either here. 1636 void* dst = &reinterpret_cast<sockaddr_in*>(&ss)->sin_addr; 1637 if (inet_pton(family, name.c_str(), dst) != 1) { 1638 return NULL; 1639 } 1640 ss.ss_family = family; 1641 return sockaddrToInetAddress(env, ss, NULL); 1642} 1643 1644static jint Linux_ioctlFlags(JNIEnv* env, jobject, jobject javaFd, jstring javaInterfaceName) { 1645 struct ifreq req; 1646 if (!fillIfreq(env, javaInterfaceName, req)) { 1647 return 0; 1648 } 1649 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1650 throwIfMinusOne(env, "ioctl", TEMP_FAILURE_RETRY(ioctl(fd, SIOCGIFFLAGS, &req))); 1651 return req.ifr_flags; 1652} 1653 1654static jobject Linux_ioctlInetAddress(JNIEnv* env, jobject, jobject javaFd, jint cmd, jstring javaInterfaceName) { 1655 struct ifreq req; 1656 if (!fillIfreq(env, javaInterfaceName, req)) { 1657 return NULL; 1658 } 1659 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1660 int rc = throwIfMinusOne(env, "ioctl", TEMP_FAILURE_RETRY(ioctl(fd, cmd, &req))); 1661 if (rc == -1) { 1662 return NULL; 1663 } 1664 return sockaddrToInetAddress(env, reinterpret_cast<sockaddr_storage&>(req.ifr_addr), NULL); 1665} 1666 1667static jint Linux_ioctlInt(JNIEnv* env, jobject, jobject javaFd, jint cmd, jobject javaArg) { 1668 // This is complicated because ioctls may return their result by updating their argument 1669 // or via their return value, so we need to support both. 1670 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1671 static jfieldID valueFid = env->GetFieldID(JniConstants::mutableIntClass, "value", "I"); 1672 jint arg = env->GetIntField(javaArg, valueFid); 1673 int rc = throwIfMinusOne(env, "ioctl", TEMP_FAILURE_RETRY(ioctl(fd, cmd, &arg))); 1674 if (!env->ExceptionCheck()) { 1675 env->SetIntField(javaArg, valueFid, arg); 1676 } 1677 return rc; 1678} 1679 1680static jint Linux_ioctlMTU(JNIEnv* env, jobject, jobject javaFd, jstring javaInterfaceName) { 1681 struct ifreq req; 1682 if (!fillIfreq(env, javaInterfaceName, req)) { 1683 return 0; 1684 } 1685 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1686 throwIfMinusOne(env, "ioctl", TEMP_FAILURE_RETRY(ioctl(fd, SIOCGIFMTU, &req))); 1687 return req.ifr_mtu; 1688} 1689 1690static jboolean Linux_isatty(JNIEnv* env, jobject, jobject javaFd) { 1691 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1692 return TEMP_FAILURE_RETRY(isatty(fd)) == 1; 1693} 1694 1695static void Linux_kill(JNIEnv* env, jobject, jint pid, jint sig) { 1696 throwIfMinusOne(env, "kill", TEMP_FAILURE_RETRY(kill(pid, sig))); 1697} 1698 1699static void Linux_lchown(JNIEnv* env, jobject, jstring javaPath, jint uid, jint gid) { 1700 ScopedUtfChars path(env, javaPath); 1701 if (path.c_str() == NULL) { 1702 return; 1703 } 1704 throwIfMinusOne(env, "lchown", TEMP_FAILURE_RETRY(lchown(path.c_str(), uid, gid))); 1705} 1706 1707static void Linux_link(JNIEnv* env, jobject, jstring javaOldPath, jstring javaNewPath) { 1708 ScopedUtfChars oldPath(env, javaOldPath); 1709 if (oldPath.c_str() == NULL) { 1710 return; 1711 } 1712 ScopedUtfChars newPath(env, javaNewPath); 1713 if (newPath.c_str() == NULL) { 1714 return; 1715 } 1716 throwIfMinusOne(env, "link", TEMP_FAILURE_RETRY(link(oldPath.c_str(), newPath.c_str()))); 1717} 1718 1719static void Linux_listen(JNIEnv* env, jobject, jobject javaFd, jint backlog) { 1720 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1721 throwIfMinusOne(env, "listen", TEMP_FAILURE_RETRY(listen(fd, backlog))); 1722} 1723 1724static jobjectArray Linux_listxattr(JNIEnv* env, jobject, jstring javaPath) { 1725 ScopedUtfChars path(env, javaPath); 1726 if (path.c_str() == NULL) { 1727 return NULL; 1728 } 1729 1730 while (true) { 1731 // Get the current size of the named extended attribute. 1732 ssize_t valueLength; 1733 if ((valueLength = listxattr(path.c_str(), NULL, 0)) < 0) { 1734 throwErrnoException(env, "listxattr"); 1735 return NULL; 1736 } 1737 1738 // Create the actual byte array. 1739 std::string buf(valueLength, '\0'); 1740 if ((valueLength = listxattr(path.c_str(), &buf[0], valueLength)) < 0) { 1741 if (errno == ERANGE) { 1742 // The attribute value has changed since last listxattr call and buf no longer fits, 1743 // try again. 1744 continue; 1745 } 1746 throwErrnoException(env, "listxattr"); 1747 return NULL; 1748 } 1749 1750 // Split the output by '\0'. 1751 buf.resize(valueLength > 0 ? valueLength - 1 : 0); // Remove the trailing NULL character. 1752 std::string delim("\0", 1); 1753 auto xattrs = android::base::Split(buf, delim); 1754 1755 return toStringArray(env, xattrs); 1756 } 1757} 1758 1759static jlong Linux_lseek(JNIEnv* env, jobject, jobject javaFd, jlong offset, jint whence) { 1760 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1761 return throwIfMinusOne(env, "lseek", TEMP_FAILURE_RETRY(lseek64(fd, offset, whence))); 1762} 1763 1764static jobject Linux_lstat(JNIEnv* env, jobject, jstring javaPath) { 1765 return doStat(env, javaPath, true); 1766} 1767 1768static void Linux_mincore(JNIEnv* env, jobject, jlong address, jlong byteCount, jbyteArray javaVector) { 1769 ScopedByteArrayRW vector(env, javaVector); 1770 if (vector.get() == NULL) { 1771 return; 1772 } 1773 void* ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1774 unsigned char* vec = reinterpret_cast<unsigned char*>(vector.get()); 1775 throwIfMinusOne(env, "mincore", TEMP_FAILURE_RETRY(mincore(ptr, byteCount, vec))); 1776} 1777 1778static void Linux_mkdir(JNIEnv* env, jobject, jstring javaPath, jint mode) { 1779 ScopedUtfChars path(env, javaPath); 1780 if (path.c_str() == NULL) { 1781 return; 1782 } 1783 throwIfMinusOne(env, "mkdir", TEMP_FAILURE_RETRY(mkdir(path.c_str(), mode))); 1784} 1785 1786static void Linux_mkfifo(JNIEnv* env, jobject, jstring javaPath, jint mode) { 1787 ScopedUtfChars path(env, javaPath); 1788 if (path.c_str() == NULL) { 1789 return; 1790 } 1791 throwIfMinusOne(env, "mkfifo", TEMP_FAILURE_RETRY(mkfifo(path.c_str(), mode))); 1792} 1793 1794static void Linux_mlock(JNIEnv* env, jobject, jlong address, jlong byteCount) { 1795 void* ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1796 throwIfMinusOne(env, "mlock", TEMP_FAILURE_RETRY(mlock(ptr, byteCount))); 1797} 1798 1799static jlong Linux_mmap(JNIEnv* env, jobject, jlong address, jlong byteCount, jint prot, jint flags, jobject javaFd, jlong offset) { 1800 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1801 void* suggestedPtr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1802 void* ptr = mmap64(suggestedPtr, byteCount, prot, flags, fd, offset); 1803 if (ptr == MAP_FAILED) { 1804 throwErrnoException(env, "mmap"); 1805 } 1806 return static_cast<jlong>(reinterpret_cast<uintptr_t>(ptr)); 1807} 1808 1809static void Linux_msync(JNIEnv* env, jobject, jlong address, jlong byteCount, jint flags) { 1810 void* ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1811 throwIfMinusOne(env, "msync", TEMP_FAILURE_RETRY(msync(ptr, byteCount, flags))); 1812} 1813 1814static void Linux_munlock(JNIEnv* env, jobject, jlong address, jlong byteCount) { 1815 void* ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1816 throwIfMinusOne(env, "munlock", TEMP_FAILURE_RETRY(munlock(ptr, byteCount))); 1817} 1818 1819static void Linux_munmap(JNIEnv* env, jobject, jlong address, jlong byteCount) { 1820 void* ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(address)); 1821 throwIfMinusOne(env, "munmap", TEMP_FAILURE_RETRY(munmap(ptr, byteCount))); 1822} 1823 1824static jobject Linux_open(JNIEnv* env, jobject, jstring javaPath, jint flags, jint mode) { 1825 ScopedUtfChars path(env, javaPath); 1826 if (path.c_str() == NULL) { 1827 return NULL; 1828 } 1829 int fd = throwIfMinusOne(env, "open", TEMP_FAILURE_RETRY(open(path.c_str(), flags, mode))); 1830 return fd != -1 ? jniCreateFileDescriptor(env, fd) : NULL; 1831} 1832 1833static jobjectArray Linux_pipe2(JNIEnv* env, jobject, jint flags __unused) { 1834 int fds[2]; 1835 int pipe2_result = throwIfMinusOne(env, "pipe2", TEMP_FAILURE_RETRY(pipe2(&fds[0], flags))); 1836 if (pipe2_result == -1) { 1837 return NULL; 1838 } 1839 jobjectArray result = env->NewObjectArray(2, JniConstants::fileDescriptorClass, NULL); 1840 if (result == NULL) { 1841 return NULL; 1842 } 1843 for (int i = 0; i < 2; ++i) { 1844 ScopedLocalRef<jobject> fd(env, jniCreateFileDescriptor(env, fds[i])); 1845 if (fd.get() == NULL) { 1846 return NULL; 1847 } 1848 env->SetObjectArrayElement(result, i, fd.get()); 1849 if (env->ExceptionCheck()) { 1850 return NULL; 1851 } 1852 } 1853 return result; 1854} 1855 1856static jint Linux_poll(JNIEnv* env, jobject, jobjectArray javaStructs, jint timeoutMs) { 1857 static jfieldID fdFid = env->GetFieldID(JniConstants::structPollfdClass, "fd", "Ljava/io/FileDescriptor;"); 1858 static jfieldID eventsFid = env->GetFieldID(JniConstants::structPollfdClass, "events", "S"); 1859 static jfieldID reventsFid = env->GetFieldID(JniConstants::structPollfdClass, "revents", "S"); 1860 1861 // Turn the Java android.system.StructPollfd[] into a C++ struct pollfd[]. 1862 size_t arrayLength = env->GetArrayLength(javaStructs); 1863 std::unique_ptr<struct pollfd[]> fds(new struct pollfd[arrayLength]); 1864 memset(fds.get(), 0, sizeof(struct pollfd) * arrayLength); 1865 size_t count = 0; // Some trailing array elements may be irrelevant. (See below.) 1866 for (size_t i = 0; i < arrayLength; ++i) { 1867 ScopedLocalRef<jobject> javaStruct(env, env->GetObjectArrayElement(javaStructs, i)); 1868 if (javaStruct.get() == NULL) { 1869 break; // We allow trailing nulls in the array for caller convenience. 1870 } 1871 ScopedLocalRef<jobject> javaFd(env, env->GetObjectField(javaStruct.get(), fdFid)); 1872 if (javaFd.get() == NULL) { 1873 break; // We also allow callers to just clear the fd field (this is what Selector does). 1874 } 1875 fds[count].fd = jniGetFDFromFileDescriptor(env, javaFd.get()); 1876 fds[count].events = env->GetShortField(javaStruct.get(), eventsFid); 1877 ++count; 1878 } 1879 1880 std::vector<AsynchronousCloseMonitor*> monitors; 1881 for (size_t i = 0; i < count; ++i) { 1882 monitors.push_back(new AsynchronousCloseMonitor(fds[i].fd)); 1883 } 1884 1885 int rc; 1886 while (true) { 1887 timespec before; 1888 clock_gettime(CLOCK_MONOTONIC, &before); 1889 1890 rc = poll(fds.get(), count, timeoutMs); 1891 if (rc >= 0 || errno != EINTR) { 1892 break; 1893 } 1894 1895 // We got EINTR. Work out how much of the original timeout is still left. 1896 if (timeoutMs > 0) { 1897 timespec now; 1898 clock_gettime(CLOCK_MONOTONIC, &now); 1899 1900 timespec diff; 1901 diff.tv_sec = now.tv_sec - before.tv_sec; 1902 diff.tv_nsec = now.tv_nsec - before.tv_nsec; 1903 if (diff.tv_nsec < 0) { 1904 --diff.tv_sec; 1905 diff.tv_nsec += 1000000000; 1906 } 1907 1908 jint diffMs = diff.tv_sec * 1000 + diff.tv_nsec / 1000000; 1909 if (diffMs >= timeoutMs) { 1910 rc = 0; // We have less than 1ms left anyway, so just time out. 1911 break; 1912 } 1913 1914 timeoutMs -= diffMs; 1915 } 1916 } 1917 1918 for (size_t i = 0; i < monitors.size(); ++i) { 1919 delete monitors[i]; 1920 } 1921 if (rc == -1) { 1922 throwErrnoException(env, "poll"); 1923 return -1; 1924 } 1925 1926 // Update the revents fields in the Java android.system.StructPollfd[]. 1927 for (size_t i = 0; i < count; ++i) { 1928 ScopedLocalRef<jobject> javaStruct(env, env->GetObjectArrayElement(javaStructs, i)); 1929 if (javaStruct.get() == NULL) { 1930 return -1; 1931 } 1932 env->SetShortField(javaStruct.get(), reventsFid, fds[i].revents); 1933 } 1934 return rc; 1935} 1936 1937static void Linux_posix_fallocate(JNIEnv* env, jobject, jobject javaFd __unused, 1938 jlong offset __unused, jlong length __unused) { 1939 int fd = jniGetFDFromFileDescriptor(env, javaFd); 1940 while ((errno = posix_fallocate64(fd, offset, length)) == EINTR) { 1941 } 1942 if (errno != 0) { 1943 throwErrnoException(env, "posix_fallocate"); 1944 } 1945} 1946 1947static jint Linux_prctl(JNIEnv* env, jobject, jint option __unused, jlong arg2 __unused, 1948 jlong arg3 __unused, jlong arg4 __unused, jlong arg5 __unused) { 1949 int result = TEMP_FAILURE_RETRY(prctl(static_cast<int>(option), 1950 static_cast<unsigned long>(arg2), 1951 static_cast<unsigned long>(arg3), 1952 static_cast<unsigned long>(arg4), 1953 static_cast<unsigned long>(arg5))); 1954 return throwIfMinusOne(env, "prctl", result); 1955} 1956 1957static jint Linux_preadBytes(JNIEnv* env, jobject, jobject javaFd, jobject javaBytes, jint byteOffset, jint byteCount, jlong offset) { 1958 ScopedBytesRW bytes(env, javaBytes); 1959 if (bytes.get() == NULL) { 1960 return -1; 1961 } 1962 return IO_FAILURE_RETRY(env, ssize_t, pread64, javaFd, bytes.get() + byteOffset, byteCount, offset); 1963} 1964 1965static jint Linux_pwriteBytes(JNIEnv* env, jobject, jobject javaFd, jbyteArray javaBytes, jint byteOffset, jint byteCount, jlong offset) { 1966 ScopedBytesRO bytes(env, javaBytes); 1967 if (bytes.get() == NULL) { 1968 return -1; 1969 } 1970 return IO_FAILURE_RETRY(env, ssize_t, pwrite64, javaFd, bytes.get() + byteOffset, byteCount, offset); 1971} 1972 1973static jint Linux_readBytes(JNIEnv* env, jobject, jobject javaFd, jobject javaBytes, jint byteOffset, jint byteCount) { 1974 ScopedBytesRW bytes(env, javaBytes); 1975 if (bytes.get() == NULL) { 1976 return -1; 1977 } 1978 return IO_FAILURE_RETRY(env, ssize_t, read, javaFd, bytes.get() + byteOffset, byteCount); 1979} 1980 1981static jstring Linux_readlink(JNIEnv* env, jobject, jstring javaPath) { 1982 ScopedUtfChars path(env, javaPath); 1983 if (path.c_str() == NULL) { 1984 return NULL; 1985 } 1986 1987 std::string result; 1988 if (!android::base::Readlink(path.c_str(), &result)) { 1989 throwErrnoException(env, "readlink"); 1990 return NULL; 1991 } 1992 return env->NewStringUTF(result.c_str()); 1993} 1994 1995static jstring Linux_realpath(JNIEnv* env, jobject, jstring javaPath) { 1996 ScopedUtfChars path(env, javaPath); 1997 if (path.c_str() == NULL) { 1998 return NULL; 1999 } 2000 2001 std::unique_ptr<char, c_deleter> real_path(realpath(path.c_str(), nullptr)); 2002 if (real_path.get() == nullptr) { 2003 throwErrnoException(env, "realpath"); 2004 return NULL; 2005 } 2006 2007 return env->NewStringUTF(real_path.get()); 2008} 2009 2010static jint Linux_readv(JNIEnv* env, jobject, jobject javaFd, jobjectArray buffers, jintArray offsets, jintArray byteCounts) { 2011 IoVec<ScopedBytesRW> ioVec(env, env->GetArrayLength(buffers)); 2012 if (!ioVec.init(buffers, offsets, byteCounts)) { 2013 return -1; 2014 } 2015 return IO_FAILURE_RETRY(env, ssize_t, readv, javaFd, ioVec.get(), ioVec.size()); 2016} 2017 2018static jint Linux_recvfromBytes(JNIEnv* env, jobject, jobject javaFd, jobject javaBytes, jint byteOffset, jint byteCount, jint flags, jobject javaInetSocketAddress) { 2019 ScopedBytesRW bytes(env, javaBytes); 2020 if (bytes.get() == NULL) { 2021 return -1; 2022 } 2023 sockaddr_storage ss; 2024 socklen_t sl = sizeof(ss); 2025 memset(&ss, 0, sizeof(ss)); 2026 sockaddr* from = (javaInetSocketAddress != NULL) ? reinterpret_cast<sockaddr*>(&ss) : NULL; 2027 socklen_t* fromLength = (javaInetSocketAddress != NULL) ? &sl : 0; 2028 jint recvCount = NET_FAILURE_RETRY(env, ssize_t, recvfrom, javaFd, bytes.get() + byteOffset, byteCount, flags, from, fromLength); 2029 if (recvCount >= 0) { 2030 // The socket may have performed orderly shutdown and recvCount would return 0 (see man 2 2031 // recvfrom), in which case ss.ss_family == AF_UNIX and fillInetSocketAddress would fail. 2032 // Don't fill in the address if recvfrom didn't succeed. http://b/33483694 2033 if (ss.ss_family == AF_INET || ss.ss_family == AF_INET6) { 2034 fillInetSocketAddress(env, javaInetSocketAddress, ss); 2035 } 2036 } 2037 return recvCount; 2038} 2039 2040static void Linux_remove(JNIEnv* env, jobject, jstring javaPath) { 2041 ScopedUtfChars path(env, javaPath); 2042 if (path.c_str() == NULL) { 2043 return; 2044 } 2045 throwIfMinusOne(env, "remove", TEMP_FAILURE_RETRY(remove(path.c_str()))); 2046} 2047 2048static void Linux_removexattr(JNIEnv* env, jobject, jstring javaPath, jstring javaName) { 2049 ScopedUtfChars path(env, javaPath); 2050 if (path.c_str() == NULL) { 2051 return; 2052 } 2053 ScopedUtfChars name(env, javaName); 2054 if (name.c_str() == NULL) { 2055 return; 2056 } 2057 2058 int res = removexattr(path.c_str(), name.c_str()); 2059 if (res < 0) { 2060 throwErrnoException(env, "removexattr"); 2061 } 2062} 2063 2064static void Linux_rename(JNIEnv* env, jobject, jstring javaOldPath, jstring javaNewPath) { 2065 ScopedUtfChars oldPath(env, javaOldPath); 2066 if (oldPath.c_str() == NULL) { 2067 return; 2068 } 2069 ScopedUtfChars newPath(env, javaNewPath); 2070 if (newPath.c_str() == NULL) { 2071 return; 2072 } 2073 throwIfMinusOne(env, "rename", TEMP_FAILURE_RETRY(rename(oldPath.c_str(), newPath.c_str()))); 2074} 2075 2076static jlong Linux_sendfile(JNIEnv* env, jobject, jobject javaOutFd, jobject javaInFd, jobject javaOffset, jlong byteCount) { 2077 int outFd = jniGetFDFromFileDescriptor(env, javaOutFd); 2078 int inFd = jniGetFDFromFileDescriptor(env, javaInFd); 2079 static jfieldID valueFid = env->GetFieldID(JniConstants::mutableLongClass, "value", "J"); 2080 off_t offset = 0; 2081 off_t* offsetPtr = NULL; 2082 if (javaOffset != NULL) { 2083 // TODO: fix bionic so we can have a 64-bit off_t! 2084 offset = env->GetLongField(javaOffset, valueFid); 2085 offsetPtr = &offset; 2086 } 2087 jlong result = throwIfMinusOne(env, "sendfile", TEMP_FAILURE_RETRY(sendfile(outFd, inFd, offsetPtr, byteCount))); 2088 if (result == -1) { 2089 return -1; 2090 } 2091 if (javaOffset != NULL) { 2092 env->SetLongField(javaOffset, valueFid, offset); 2093 } 2094 return result; 2095} 2096 2097static jint Linux_sendtoBytes(JNIEnv* env, jobject, jobject javaFd, jobject javaBytes, jint byteOffset, jint byteCount, jint flags, jobject javaInetAddress, jint port) { 2098 ScopedBytesRO bytes(env, javaBytes); 2099 if (bytes.get() == NULL) { 2100 return -1; 2101 } 2102 2103 return NET_IPV4_FALLBACK(env, ssize_t, sendto, javaFd, javaInetAddress, port, 2104 NULL_ADDR_OK, bytes.get() + byteOffset, byteCount, flags); 2105} 2106 2107static jint Linux_sendtoBytesSocketAddress(JNIEnv* env, jobject, jobject javaFd, jobject javaBytes, jint byteOffset, jint byteCount, jint flags, jobject javaSocketAddress) { 2108 if (env->IsInstanceOf(javaSocketAddress, JniConstants::inetSocketAddressClass)) { 2109 // Use the InetAddress version so we get the benefit of NET_IPV4_FALLBACK. 2110 jobject javaInetAddress; 2111 jint port; 2112 javaInetSocketAddressToInetAddressAndPort(env, javaSocketAddress, javaInetAddress, port); 2113 return Linux_sendtoBytes(env, NULL, javaFd, javaBytes, byteOffset, byteCount, flags, 2114 javaInetAddress, port); 2115 } 2116 2117 ScopedBytesRO bytes(env, javaBytes); 2118 if (bytes.get() == NULL) { 2119 return -1; 2120 } 2121 2122 sockaddr_storage ss; 2123 socklen_t sa_len; 2124 if (!javaSocketAddressToSockaddr(env, javaSocketAddress, ss, sa_len)) { 2125 return -1; 2126 } 2127 2128 const sockaddr* sa = reinterpret_cast<const sockaddr*>(&ss); 2129 // We don't need the return value because we'll already have thrown. 2130 return NET_FAILURE_RETRY(env, ssize_t, sendto, javaFd, bytes.get() + byteOffset, byteCount, flags, sa, sa_len); 2131} 2132 2133static void Linux_setegid(JNIEnv* env, jobject, jint egid) { 2134 throwIfMinusOne(env, "setegid", TEMP_FAILURE_RETRY(setegid(egid))); 2135} 2136 2137static void Linux_setenv(JNIEnv* env, jobject, jstring javaName, jstring javaValue, jboolean overwrite) { 2138 ScopedUtfChars name(env, javaName); 2139 if (name.c_str() == NULL) { 2140 return; 2141 } 2142 ScopedUtfChars value(env, javaValue); 2143 if (value.c_str() == NULL) { 2144 return; 2145 } 2146 throwIfMinusOne(env, "setenv", setenv(name.c_str(), value.c_str(), overwrite)); 2147} 2148 2149static void Linux_seteuid(JNIEnv* env, jobject, jint euid) { 2150 throwIfMinusOne(env, "seteuid", TEMP_FAILURE_RETRY(seteuid(euid))); 2151} 2152 2153static void Linux_setgid(JNIEnv* env, jobject, jint gid) { 2154 throwIfMinusOne(env, "setgid", TEMP_FAILURE_RETRY(setgid(gid))); 2155} 2156 2157static void Linux_setpgid(JNIEnv* env, jobject, jint pid, int pgid) { 2158 throwIfMinusOne(env, "setpgid", TEMP_FAILURE_RETRY(setpgid(pid, pgid))); 2159} 2160 2161static void Linux_setregid(JNIEnv* env, jobject, jint rgid, int egid) { 2162 throwIfMinusOne(env, "setregid", TEMP_FAILURE_RETRY(setregid(rgid, egid))); 2163} 2164 2165static void Linux_setreuid(JNIEnv* env, jobject, jint ruid, int euid) { 2166 throwIfMinusOne(env, "setreuid", TEMP_FAILURE_RETRY(setreuid(ruid, euid))); 2167} 2168 2169static jint Linux_setsid(JNIEnv* env, jobject) { 2170 return throwIfMinusOne(env, "setsid", TEMP_FAILURE_RETRY(setsid())); 2171} 2172 2173static void Linux_setsockoptByte(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jint value) { 2174 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2175 u_char byte = value; 2176 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &byte, sizeof(byte)))); 2177} 2178 2179static void Linux_setsockoptIfreq(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jstring javaInterfaceName) { 2180 struct ifreq req; 2181 if (!fillIfreq(env, javaInterfaceName, req)) { 2182 return; 2183 } 2184 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2185 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req, sizeof(req)))); 2186} 2187 2188static void Linux_setsockoptInt(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jint value) { 2189 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2190 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &value, sizeof(value)))); 2191} 2192 2193static void Linux_setsockoptIpMreqn(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jint value) { 2194 ip_mreqn req; 2195 memset(&req, 0, sizeof(req)); 2196 req.imr_ifindex = value; 2197 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2198 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req, sizeof(req)))); 2199} 2200 2201static void Linux_setsockoptGroupReq(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jobject javaGroupReq) { 2202 struct group_req req; 2203 memset(&req, 0, sizeof(req)); 2204 2205 static jfieldID grInterfaceFid = env->GetFieldID(JniConstants::structGroupReqClass, "gr_interface", "I"); 2206 req.gr_interface = env->GetIntField(javaGroupReq, grInterfaceFid); 2207 // Get the IPv4 or IPv6 multicast address to join or leave. 2208 static jfieldID grGroupFid = env->GetFieldID(JniConstants::structGroupReqClass, "gr_group", "Ljava/net/InetAddress;"); 2209 ScopedLocalRef<jobject> javaGroup(env, env->GetObjectField(javaGroupReq, grGroupFid)); 2210 socklen_t sa_len; 2211 if (!inetAddressToSockaddrVerbatim(env, javaGroup.get(), 0, req.gr_group, sa_len)) { 2212 return; 2213 } 2214 2215 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2216 int rc = TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req, sizeof(req))); 2217 if (rc == -1 && errno == EINVAL) { 2218 // Maybe we're a 32-bit binary talking to a 64-bit kernel? 2219 // glibc doesn't automatically handle this. 2220 // http://sourceware.org/bugzilla/show_bug.cgi?id=12080 2221 struct group_req64 { 2222 uint32_t gr_interface; 2223 uint32_t my_padding; 2224 sockaddr_storage gr_group; 2225 }; 2226 group_req64 req64; 2227 req64.gr_interface = req.gr_interface; 2228 memcpy(&req64.gr_group, &req.gr_group, sizeof(req.gr_group)); 2229 rc = TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req64, sizeof(req64))); 2230 } 2231 throwIfMinusOne(env, "setsockopt", rc); 2232} 2233 2234static void Linux_setsockoptGroupSourceReq(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jobject javaGroupSourceReq) { 2235 socklen_t sa_len; 2236 struct group_source_req req; 2237 memset(&req, 0, sizeof(req)); 2238 2239 static jfieldID gsrInterfaceFid = env->GetFieldID(JniConstants::structGroupSourceReqClass, "gsr_interface", "I"); 2240 req.gsr_interface = env->GetIntField(javaGroupSourceReq, gsrInterfaceFid); 2241 // Get the IPv4 or IPv6 multicast address to join or leave. 2242 static jfieldID gsrGroupFid = env->GetFieldID(JniConstants::structGroupSourceReqClass, "gsr_group", "Ljava/net/InetAddress;"); 2243 ScopedLocalRef<jobject> javaGroup(env, env->GetObjectField(javaGroupSourceReq, gsrGroupFid)); 2244 if (!inetAddressToSockaddrVerbatim(env, javaGroup.get(), 0, req.gsr_group, sa_len)) { 2245 return; 2246 } 2247 2248 // Get the IPv4 or IPv6 multicast address to add to the filter. 2249 static jfieldID gsrSourceFid = env->GetFieldID(JniConstants::structGroupSourceReqClass, "gsr_source", "Ljava/net/InetAddress;"); 2250 ScopedLocalRef<jobject> javaSource(env, env->GetObjectField(javaGroupSourceReq, gsrSourceFid)); 2251 if (!inetAddressToSockaddrVerbatim(env, javaSource.get(), 0, req.gsr_source, sa_len)) { 2252 return; 2253 } 2254 2255 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2256 int rc = TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req, sizeof(req))); 2257 if (rc == -1 && errno == EINVAL) { 2258 // Maybe we're a 32-bit binary talking to a 64-bit kernel? 2259 // glibc doesn't automatically handle this. 2260 // http://sourceware.org/bugzilla/show_bug.cgi?id=12080 2261 struct group_source_req64 { 2262 uint32_t gsr_interface; 2263 uint32_t my_padding; 2264 sockaddr_storage gsr_group; 2265 sockaddr_storage gsr_source; 2266 }; 2267 group_source_req64 req64; 2268 req64.gsr_interface = req.gsr_interface; 2269 memcpy(&req64.gsr_group, &req.gsr_group, sizeof(req.gsr_group)); 2270 memcpy(&req64.gsr_source, &req.gsr_source, sizeof(req.gsr_source)); 2271 rc = TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &req64, sizeof(req64))); 2272 } 2273 throwIfMinusOne(env, "setsockopt", rc); 2274} 2275 2276static void Linux_setsockoptLinger(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jobject javaLinger) { 2277 static jfieldID lOnoffFid = env->GetFieldID(JniConstants::structLingerClass, "l_onoff", "I"); 2278 static jfieldID lLingerFid = env->GetFieldID(JniConstants::structLingerClass, "l_linger", "I"); 2279 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2280 struct linger value; 2281 value.l_onoff = env->GetIntField(javaLinger, lOnoffFid); 2282 value.l_linger = env->GetIntField(javaLinger, lLingerFid); 2283 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &value, sizeof(value)))); 2284} 2285 2286static void Linux_setsockoptTimeval(JNIEnv* env, jobject, jobject javaFd, jint level, jint option, jobject javaTimeval) { 2287 static jfieldID tvSecFid = env->GetFieldID(JniConstants::structTimevalClass, "tv_sec", "J"); 2288 static jfieldID tvUsecFid = env->GetFieldID(JniConstants::structTimevalClass, "tv_usec", "J"); 2289 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2290 struct timeval value; 2291 value.tv_sec = env->GetLongField(javaTimeval, tvSecFid); 2292 value.tv_usec = env->GetLongField(javaTimeval, tvUsecFid); 2293 throwIfMinusOne(env, "setsockopt", TEMP_FAILURE_RETRY(setsockopt(fd, level, option, &value, sizeof(value)))); 2294} 2295 2296static void Linux_setuid(JNIEnv* env, jobject, jint uid) { 2297 throwIfMinusOne(env, "setuid", TEMP_FAILURE_RETRY(setuid(uid))); 2298} 2299 2300static void Linux_setxattr(JNIEnv* env, jobject, jstring javaPath, jstring javaName, 2301 jbyteArray javaValue, jint flags) { 2302 ScopedUtfChars path(env, javaPath); 2303 if (path.c_str() == NULL) { 2304 return; 2305 } 2306 ScopedUtfChars name(env, javaName); 2307 if (name.c_str() == NULL) { 2308 return; 2309 } 2310 ScopedBytesRO value(env, javaValue); 2311 if (value.get() == NULL) { 2312 return; 2313 } 2314 size_t valueLength = env->GetArrayLength(javaValue); 2315 int res = setxattr(path.c_str(), name.c_str(), value.get(), valueLength, flags); 2316 if (res < 0) { 2317 throwErrnoException(env, "setxattr"); 2318 } 2319} 2320 2321static void Linux_shutdown(JNIEnv* env, jobject, jobject javaFd, jint how) { 2322 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2323 throwIfMinusOne(env, "shutdown", TEMP_FAILURE_RETRY(shutdown(fd, how))); 2324} 2325 2326static jobject Linux_socket(JNIEnv* env, jobject, jint domain, jint type, jint protocol) { 2327 if (domain == AF_PACKET) { 2328 protocol = htons(protocol); // Packet sockets specify the protocol in host byte order. 2329 } 2330 int fd = throwIfMinusOne(env, "socket", TEMP_FAILURE_RETRY(socket(domain, type, protocol))); 2331 return fd != -1 ? jniCreateFileDescriptor(env, fd) : NULL; 2332} 2333 2334static void Linux_socketpair(JNIEnv* env, jobject, jint domain, jint type, jint protocol, jobject javaFd1, jobject javaFd2) { 2335 int fds[2]; 2336 int rc = throwIfMinusOne(env, "socketpair", TEMP_FAILURE_RETRY(socketpair(domain, type, protocol, fds))); 2337 if (rc != -1) { 2338 jniSetFileDescriptorOfFD(env, javaFd1, fds[0]); 2339 jniSetFileDescriptorOfFD(env, javaFd2, fds[1]); 2340 } 2341} 2342 2343static jobject Linux_stat(JNIEnv* env, jobject, jstring javaPath) { 2344 return doStat(env, javaPath, false); 2345} 2346 2347static jobject Linux_statvfs(JNIEnv* env, jobject, jstring javaPath) { 2348 ScopedUtfChars path(env, javaPath); 2349 if (path.c_str() == NULL) { 2350 return NULL; 2351 } 2352 struct statvfs sb; 2353 int rc = TEMP_FAILURE_RETRY(statvfs(path.c_str(), &sb)); 2354 if (rc == -1) { 2355 throwErrnoException(env, "statvfs"); 2356 return NULL; 2357 } 2358 return makeStructStatVfs(env, sb); 2359} 2360 2361static jstring Linux_strerror(JNIEnv* env, jobject, jint errnum) { 2362 char buffer[BUFSIZ]; 2363 const char* message = jniStrError(errnum, buffer, sizeof(buffer)); 2364 return env->NewStringUTF(message); 2365} 2366 2367static jstring Linux_strsignal(JNIEnv* env, jobject, jint signal) { 2368 return env->NewStringUTF(strsignal(signal)); 2369} 2370 2371static void Linux_symlink(JNIEnv* env, jobject, jstring javaOldPath, jstring javaNewPath) { 2372 ScopedUtfChars oldPath(env, javaOldPath); 2373 if (oldPath.c_str() == NULL) { 2374 return; 2375 } 2376 ScopedUtfChars newPath(env, javaNewPath); 2377 if (newPath.c_str() == NULL) { 2378 return; 2379 } 2380 throwIfMinusOne(env, "symlink", TEMP_FAILURE_RETRY(symlink(oldPath.c_str(), newPath.c_str()))); 2381} 2382 2383static jlong Linux_sysconf(JNIEnv* env, jobject, jint name) { 2384 // Since -1 is a valid result from sysconf(3), detecting failure is a little more awkward. 2385 errno = 0; 2386 long result = sysconf(name); 2387 if (result == -1L && errno == EINVAL) { 2388 throwErrnoException(env, "sysconf"); 2389 } 2390 return result; 2391} 2392 2393static void Linux_tcdrain(JNIEnv* env, jobject, jobject javaFd) { 2394 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2395 throwIfMinusOne(env, "tcdrain", TEMP_FAILURE_RETRY(tcdrain(fd))); 2396} 2397 2398static void Linux_tcsendbreak(JNIEnv* env, jobject, jobject javaFd, jint duration) { 2399 int fd = jniGetFDFromFileDescriptor(env, javaFd); 2400 throwIfMinusOne(env, "tcsendbreak", TEMP_FAILURE_RETRY(tcsendbreak(fd, duration))); 2401} 2402 2403static jint Linux_umaskImpl(JNIEnv*, jobject, jint mask) { 2404 return umask(mask); 2405} 2406 2407static jobject Linux_uname(JNIEnv* env, jobject) { 2408 struct utsname buf; 2409 if (TEMP_FAILURE_RETRY(uname(&buf)) == -1) { 2410 return NULL; // Can't happen. 2411 } 2412 return makeStructUtsname(env, buf); 2413} 2414 2415static void Linux_unlink(JNIEnv* env, jobject, jstring javaPathname) { 2416 ScopedUtfChars pathname(env, javaPathname); 2417 if (pathname.c_str() == NULL) { 2418 return; 2419 } 2420 throwIfMinusOne(env, "unlink", unlink(pathname.c_str())); 2421} 2422 2423static void Linux_unsetenv(JNIEnv* env, jobject, jstring javaName) { 2424 ScopedUtfChars name(env, javaName); 2425 if (name.c_str() == NULL) { 2426 return; 2427 } 2428 throwIfMinusOne(env, "unsetenv", unsetenv(name.c_str())); 2429} 2430 2431static jint Linux_waitpid(JNIEnv* env, jobject, jint pid, jobject javaStatus, jint options) { 2432 int status; 2433 int rc = throwIfMinusOne(env, "waitpid", TEMP_FAILURE_RETRY(waitpid(pid, &status, options))); 2434 if (rc != -1) { 2435 static jfieldID valueFid = env->GetFieldID(JniConstants::mutableIntClass, "value", "I"); 2436 env->SetIntField(javaStatus, valueFid, status); 2437 } 2438 return rc; 2439} 2440 2441static jint Linux_writeBytes(JNIEnv* env, jobject, jobject javaFd, jbyteArray javaBytes, jint byteOffset, jint byteCount) { 2442 ScopedBytesRO bytes(env, javaBytes); 2443 if (bytes.get() == NULL) { 2444 return -1; 2445 } 2446 return IO_FAILURE_RETRY(env, ssize_t, write, javaFd, bytes.get() + byteOffset, byteCount); 2447} 2448 2449static jint Linux_writev(JNIEnv* env, jobject, jobject javaFd, jobjectArray buffers, jintArray offsets, jintArray byteCounts) { 2450 IoVec<ScopedBytesRO> ioVec(env, env->GetArrayLength(buffers)); 2451 if (!ioVec.init(buffers, offsets, byteCounts)) { 2452 return -1; 2453 } 2454 return IO_FAILURE_RETRY(env, ssize_t, writev, javaFd, ioVec.get(), ioVec.size()); 2455} 2456 2457#define NATIVE_METHOD_OVERLOAD(className, functionName, signature, variant) \ 2458 { #functionName, signature, reinterpret_cast<void*>(className ## _ ## functionName ## variant) } 2459 2460static JNINativeMethod gMethods[] = { 2461 NATIVE_METHOD(Linux, accept, "(Ljava/io/FileDescriptor;Ljava/net/SocketAddress;)Ljava/io/FileDescriptor;"), 2462 NATIVE_METHOD(Linux, access, "(Ljava/lang/String;I)Z"), 2463 NATIVE_METHOD(Linux, android_getaddrinfo, "(Ljava/lang/String;Landroid/system/StructAddrinfo;I)[Ljava/net/InetAddress;"), 2464 NATIVE_METHOD(Linux, bind, "(Ljava/io/FileDescriptor;Ljava/net/InetAddress;I)V"), 2465 NATIVE_METHOD_OVERLOAD(Linux, bind, "(Ljava/io/FileDescriptor;Ljava/net/SocketAddress;)V", SocketAddress), 2466 NATIVE_METHOD(Linux, capget, 2467 "(Landroid/system/StructCapUserHeader;)[Landroid/system/StructCapUserData;"), 2468 NATIVE_METHOD(Linux, capset, 2469 "(Landroid/system/StructCapUserHeader;[Landroid/system/StructCapUserData;)V"), 2470 NATIVE_METHOD(Linux, chmod, "(Ljava/lang/String;I)V"), 2471 NATIVE_METHOD(Linux, chown, "(Ljava/lang/String;II)V"), 2472 NATIVE_METHOD(Linux, close, "(Ljava/io/FileDescriptor;)V"), 2473 NATIVE_METHOD(Linux, connect, "(Ljava/io/FileDescriptor;Ljava/net/InetAddress;I)V"), 2474 NATIVE_METHOD_OVERLOAD(Linux, connect, "(Ljava/io/FileDescriptor;Ljava/net/SocketAddress;)V", SocketAddress), 2475 NATIVE_METHOD(Linux, dup, "(Ljava/io/FileDescriptor;)Ljava/io/FileDescriptor;"), 2476 NATIVE_METHOD(Linux, dup2, "(Ljava/io/FileDescriptor;I)Ljava/io/FileDescriptor;"), 2477 NATIVE_METHOD(Linux, environ, "()[Ljava/lang/String;"), 2478 NATIVE_METHOD(Linux, execv, "(Ljava/lang/String;[Ljava/lang/String;)V"), 2479 NATIVE_METHOD(Linux, execve, "(Ljava/lang/String;[Ljava/lang/String;[Ljava/lang/String;)V"), 2480 NATIVE_METHOD(Linux, fchmod, "(Ljava/io/FileDescriptor;I)V"), 2481 NATIVE_METHOD(Linux, fchown, "(Ljava/io/FileDescriptor;II)V"), 2482 NATIVE_METHOD(Linux, fcntlFlock, "(Ljava/io/FileDescriptor;ILandroid/system/StructFlock;)I"), 2483 NATIVE_METHOD(Linux, fcntlInt, "(Ljava/io/FileDescriptor;II)I"), 2484 NATIVE_METHOD(Linux, fcntlVoid, "(Ljava/io/FileDescriptor;I)I"), 2485 NATIVE_METHOD(Linux, fdatasync, "(Ljava/io/FileDescriptor;)V"), 2486 NATIVE_METHOD(Linux, fstat, "(Ljava/io/FileDescriptor;)Landroid/system/StructStat;"), 2487 NATIVE_METHOD(Linux, fstatvfs, "(Ljava/io/FileDescriptor;)Landroid/system/StructStatVfs;"), 2488 NATIVE_METHOD(Linux, fsync, "(Ljava/io/FileDescriptor;)V"), 2489 NATIVE_METHOD(Linux, ftruncate, "(Ljava/io/FileDescriptor;J)V"), 2490 NATIVE_METHOD(Linux, gai_strerror, "(I)Ljava/lang/String;"), 2491 NATIVE_METHOD(Linux, getegid, "()I"), 2492 NATIVE_METHOD(Linux, geteuid, "()I"), 2493 NATIVE_METHOD(Linux, getgid, "()I"), 2494 NATIVE_METHOD(Linux, getenv, "(Ljava/lang/String;)Ljava/lang/String;"), 2495 NATIVE_METHOD(Linux, getnameinfo, "(Ljava/net/InetAddress;I)Ljava/lang/String;"), 2496 NATIVE_METHOD(Linux, getpeername, "(Ljava/io/FileDescriptor;)Ljava/net/SocketAddress;"), 2497 NATIVE_METHOD(Linux, getpgid, "(I)I"), 2498 NATIVE_METHOD(Linux, getpid, "()I"), 2499 NATIVE_METHOD(Linux, getppid, "()I"), 2500 NATIVE_METHOD(Linux, getpwnam, "(Ljava/lang/String;)Landroid/system/StructPasswd;"), 2501 NATIVE_METHOD(Linux, getpwuid, "(I)Landroid/system/StructPasswd;"), 2502 NATIVE_METHOD(Linux, getrlimit, "(I)Landroid/system/StructRlimit;"), 2503 NATIVE_METHOD(Linux, getsockname, "(Ljava/io/FileDescriptor;)Ljava/net/SocketAddress;"), 2504 NATIVE_METHOD(Linux, getsockoptByte, "(Ljava/io/FileDescriptor;II)I"), 2505 NATIVE_METHOD(Linux, getsockoptInAddr, "(Ljava/io/FileDescriptor;II)Ljava/net/InetAddress;"), 2506 NATIVE_METHOD(Linux, getsockoptInt, "(Ljava/io/FileDescriptor;II)I"), 2507 NATIVE_METHOD(Linux, getsockoptLinger, "(Ljava/io/FileDescriptor;II)Landroid/system/StructLinger;"), 2508 NATIVE_METHOD(Linux, getsockoptTimeval, "(Ljava/io/FileDescriptor;II)Landroid/system/StructTimeval;"), 2509 NATIVE_METHOD(Linux, getsockoptUcred, "(Ljava/io/FileDescriptor;II)Landroid/system/StructUcred;"), 2510 NATIVE_METHOD(Linux, gettid, "()I"), 2511 NATIVE_METHOD(Linux, getuid, "()I"), 2512 NATIVE_METHOD(Linux, getxattr, "(Ljava/lang/String;Ljava/lang/String;)[B"), 2513 NATIVE_METHOD(Linux, getifaddrs, "()[Landroid/system/StructIfaddrs;"), 2514 NATIVE_METHOD(Linux, if_indextoname, "(I)Ljava/lang/String;"), 2515 NATIVE_METHOD(Linux, if_nametoindex, "(Ljava/lang/String;)I"), 2516 NATIVE_METHOD(Linux, inet_pton, "(ILjava/lang/String;)Ljava/net/InetAddress;"), 2517 NATIVE_METHOD(Linux, ioctlFlags, "(Ljava/io/FileDescriptor;Ljava/lang/String;)I"), 2518 NATIVE_METHOD(Linux, ioctlInetAddress, "(Ljava/io/FileDescriptor;ILjava/lang/String;)Ljava/net/InetAddress;"), 2519 NATIVE_METHOD(Linux, ioctlInt, "(Ljava/io/FileDescriptor;ILandroid/util/MutableInt;)I"), 2520 NATIVE_METHOD(Linux, ioctlMTU, "(Ljava/io/FileDescriptor;Ljava/lang/String;)I"), 2521 NATIVE_METHOD(Linux, isatty, "(Ljava/io/FileDescriptor;)Z"), 2522 NATIVE_METHOD(Linux, kill, "(II)V"), 2523 NATIVE_METHOD(Linux, lchown, "(Ljava/lang/String;II)V"), 2524 NATIVE_METHOD(Linux, link, "(Ljava/lang/String;Ljava/lang/String;)V"), 2525 NATIVE_METHOD(Linux, listen, "(Ljava/io/FileDescriptor;I)V"), 2526 NATIVE_METHOD(Linux, listxattr, "(Ljava/lang/String;)[Ljava/lang/String;"), 2527 NATIVE_METHOD(Linux, lseek, "(Ljava/io/FileDescriptor;JI)J"), 2528 NATIVE_METHOD(Linux, lstat, "(Ljava/lang/String;)Landroid/system/StructStat;"), 2529 NATIVE_METHOD(Linux, mincore, "(JJ[B)V"), 2530 NATIVE_METHOD(Linux, mkdir, "(Ljava/lang/String;I)V"), 2531 NATIVE_METHOD(Linux, mkfifo, "(Ljava/lang/String;I)V"), 2532 NATIVE_METHOD(Linux, mlock, "(JJ)V"), 2533 NATIVE_METHOD(Linux, mmap, "(JJIILjava/io/FileDescriptor;J)J"), 2534 NATIVE_METHOD(Linux, msync, "(JJI)V"), 2535 NATIVE_METHOD(Linux, munlock, "(JJ)V"), 2536 NATIVE_METHOD(Linux, munmap, "(JJ)V"), 2537 NATIVE_METHOD(Linux, open, "(Ljava/lang/String;II)Ljava/io/FileDescriptor;"), 2538 NATIVE_METHOD(Linux, pipe2, "(I)[Ljava/io/FileDescriptor;"), 2539 NATIVE_METHOD(Linux, poll, "([Landroid/system/StructPollfd;I)I"), 2540 NATIVE_METHOD(Linux, posix_fallocate, "(Ljava/io/FileDescriptor;JJ)V"), 2541 NATIVE_METHOD(Linux, prctl, "(IJJJJ)I"), 2542 NATIVE_METHOD(Linux, preadBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIJ)I"), 2543 NATIVE_METHOD(Linux, pwriteBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIJ)I"), 2544 NATIVE_METHOD(Linux, readBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;II)I"), 2545 NATIVE_METHOD(Linux, readlink, "(Ljava/lang/String;)Ljava/lang/String;"), 2546 NATIVE_METHOD(Linux, realpath, "(Ljava/lang/String;)Ljava/lang/String;"), 2547 NATIVE_METHOD(Linux, readv, "(Ljava/io/FileDescriptor;[Ljava/lang/Object;[I[I)I"), 2548 NATIVE_METHOD(Linux, recvfromBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIILjava/net/InetSocketAddress;)I"), 2549 NATIVE_METHOD(Linux, remove, "(Ljava/lang/String;)V"), 2550 NATIVE_METHOD(Linux, removexattr, "(Ljava/lang/String;Ljava/lang/String;)V"), 2551 NATIVE_METHOD(Linux, rename, "(Ljava/lang/String;Ljava/lang/String;)V"), 2552 NATIVE_METHOD(Linux, sendfile, "(Ljava/io/FileDescriptor;Ljava/io/FileDescriptor;Landroid/util/MutableLong;J)J"), 2553 NATIVE_METHOD(Linux, sendtoBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIILjava/net/InetAddress;I)I"), 2554 NATIVE_METHOD_OVERLOAD(Linux, sendtoBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIILjava/net/SocketAddress;)I", SocketAddress), 2555 NATIVE_METHOD(Linux, setegid, "(I)V"), 2556 NATIVE_METHOD(Linux, setenv, "(Ljava/lang/String;Ljava/lang/String;Z)V"), 2557 NATIVE_METHOD(Linux, seteuid, "(I)V"), 2558 NATIVE_METHOD(Linux, setgid, "(I)V"), 2559 NATIVE_METHOD(Linux, setpgid, "(II)V"), 2560 NATIVE_METHOD(Linux, setregid, "(II)V"), 2561 NATIVE_METHOD(Linux, setreuid, "(II)V"), 2562 NATIVE_METHOD(Linux, setsid, "()I"), 2563 NATIVE_METHOD(Linux, setsockoptByte, "(Ljava/io/FileDescriptor;III)V"), 2564 NATIVE_METHOD(Linux, setsockoptIfreq, "(Ljava/io/FileDescriptor;IILjava/lang/String;)V"), 2565 NATIVE_METHOD(Linux, setsockoptInt, "(Ljava/io/FileDescriptor;III)V"), 2566 NATIVE_METHOD(Linux, setsockoptIpMreqn, "(Ljava/io/FileDescriptor;III)V"), 2567 NATIVE_METHOD(Linux, setsockoptGroupReq, "(Ljava/io/FileDescriptor;IILandroid/system/StructGroupReq;)V"), 2568 NATIVE_METHOD(Linux, setsockoptGroupSourceReq, "(Ljava/io/FileDescriptor;IILandroid/system/StructGroupSourceReq;)V"), 2569 NATIVE_METHOD(Linux, setsockoptLinger, "(Ljava/io/FileDescriptor;IILandroid/system/StructLinger;)V"), 2570 NATIVE_METHOD(Linux, setsockoptTimeval, "(Ljava/io/FileDescriptor;IILandroid/system/StructTimeval;)V"), 2571 NATIVE_METHOD(Linux, setuid, "(I)V"), 2572 NATIVE_METHOD(Linux, setxattr, "(Ljava/lang/String;Ljava/lang/String;[BI)V"), 2573 NATIVE_METHOD(Linux, shutdown, "(Ljava/io/FileDescriptor;I)V"), 2574 NATIVE_METHOD(Linux, socket, "(III)Ljava/io/FileDescriptor;"), 2575 NATIVE_METHOD(Linux, socketpair, "(IIILjava/io/FileDescriptor;Ljava/io/FileDescriptor;)V"), 2576 NATIVE_METHOD(Linux, stat, "(Ljava/lang/String;)Landroid/system/StructStat;"), 2577 NATIVE_METHOD(Linux, statvfs, "(Ljava/lang/String;)Landroid/system/StructStatVfs;"), 2578 NATIVE_METHOD(Linux, strerror, "(I)Ljava/lang/String;"), 2579 NATIVE_METHOD(Linux, strsignal, "(I)Ljava/lang/String;"), 2580 NATIVE_METHOD(Linux, symlink, "(Ljava/lang/String;Ljava/lang/String;)V"), 2581 NATIVE_METHOD(Linux, sysconf, "(I)J"), 2582 NATIVE_METHOD(Linux, tcdrain, "(Ljava/io/FileDescriptor;)V"), 2583 NATIVE_METHOD(Linux, tcsendbreak, "(Ljava/io/FileDescriptor;I)V"), 2584 NATIVE_METHOD(Linux, umaskImpl, "(I)I"), 2585 NATIVE_METHOD(Linux, uname, "()Landroid/system/StructUtsname;"), 2586 NATIVE_METHOD(Linux, unlink, "(Ljava/lang/String;)V"), 2587 NATIVE_METHOD(Linux, unsetenv, "(Ljava/lang/String;)V"), 2588 NATIVE_METHOD(Linux, waitpid, "(ILandroid/util/MutableInt;I)I"), 2589 NATIVE_METHOD(Linux, writeBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;II)I"), 2590 NATIVE_METHOD(Linux, writev, "(Ljava/io/FileDescriptor;[Ljava/lang/Object;[I[I)I"), 2591}; 2592void register_libcore_io_Linux(JNIEnv* env) { 2593 jniRegisterNativeMethods(env, "libcore/io/Linux", gMethods, NELEM(gMethods)); 2594} 2595