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src/java.base/unix/native/libnio/fs/UnixNativeDispatcher.c
1 477 строк
44 KB
Benjamin Peterson
8364322: (fs) fchmodat support for AT_SYMLINK_NOFOLLOW flag too pessimistic on Linux
02 июл 2026, 08:35
02 июл 2026, 08:35
e1a3967
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/* * Copyright (c) 2008, 2026, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <limits.h> #include <fcntl.h> #include <dirent.h> #include <unistd.h> #include <errno.h> #include <dlfcn.h> #include <sys/types.h> #include <sys/stat.h> #ifdef MACOSX #include <sys/param.h> #include <sys/mount.h> #else #include <sys/statvfs.h> #endif #include <sys/time.h> #if defined(__linux__) || defined(_ALLBSD_SOURCE) #include <sys/xattr.h> #endif #if defined(_AIX) #include <sys/ea.h> #endif /* For POSIX-compliant getpwuid_r */ #include <pwd.h> #include <grp.h> #ifdef __linux__ #include <stdint.h> // For uintXX_t types used in statx support #include <sys/syscall.h> #include <sys/sysmacros.h> // makedev macros #endif #if defined(_AIX) #define statvfs statvfs64 #endif #if defined(__linux__) // Account for the case where we compile on a system without statx // support. We still want to ensure we can call statx at runtime // if the runtime glibc version supports it (>= 2.28). We do this // by defining binary compatible statx structs in this file and // not relying on included headers. /* * Timestamp structure for the timestamps in struct statx. */ struct my_statx_timestamp { int64_t tv_sec; uint32_t tv_nsec; int32_t __reserved; }; /* * struct statx used by statx system call on >= glibc 2.28 * systems */ struct my_statx { uint32_t stx_mask; uint32_t stx_blksize; uint64_t stx_attributes; uint32_t stx_nlink; uint32_t stx_uid; uint32_t stx_gid; uint16_t stx_mode; uint16_t __statx_pad1[1]; uint64_t stx_ino; uint64_t stx_size; uint64_t stx_blocks; uint64_t stx_attributes_mask; struct my_statx_timestamp stx_atime; struct my_statx_timestamp stx_btime; struct my_statx_timestamp stx_ctime; struct my_statx_timestamp stx_mtime; uint32_t stx_rdev_major; uint32_t stx_rdev_minor; uint32_t stx_dev_major; uint32_t stx_dev_minor; uint64_t __statx_pad2[14]; }; // statx masks, flags, constants #ifndef AT_SYMLINK_NOFOLLOW #define AT_SYMLINK_NOFOLLOW 0x100 #endif #ifndef AT_STATX_SYNC_AS_STAT #define AT_STATX_SYNC_AS_STAT 0x0000 #endif #ifndef AT_EMPTY_PATH #define AT_EMPTY_PATH 0x1000 #endif #ifndef STATX_BASIC_STATS #define STATX_BASIC_STATS 0x000007ffU #endif #ifndef STATX_BTIME #define STATX_BTIME 0x00000800U #endif // // STATX_ALL is deprecated; use a different name to avoid confusion. // #define LOCAL_STATX_ALL (STATX_BASIC_STATS | STATX_BTIME) #ifndef AT_FDCWD #define AT_FDCWD -100 #endif #ifndef RTLD_DEFAULT #define RTLD_DEFAULT RTLD_LOCAL #endif #define NO_FOLLOW_SYMLINK 1 #define FOLLOW_SYMLINK 0 #endif // __linux__ #include "jni.h" #include "jni_util.h" #include "jlong.h" #include "sun_nio_fs_UnixNativeDispatcher.h" /** * Size of password or group entry when not available via sysconf */ #define ENT_BUF_SIZE 1024 static jfieldID attrs_st_mode; static jfieldID attrs_st_ino; static jfieldID attrs_st_dev; static jfieldID attrs_st_rdev; static jfieldID attrs_st_nlink; static jfieldID attrs_st_uid; static jfieldID attrs_st_gid; static jfieldID attrs_st_size; static jfieldID attrs_st_atime_sec; static jfieldID attrs_st_atime_nsec; static jfieldID attrs_st_mtime_sec; static jfieldID attrs_st_mtime_nsec; static jfieldID attrs_st_ctime_sec; static jfieldID attrs_st_ctime_nsec; #if defined(_DARWIN_FEATURE_64_BIT_INODE) || defined(__linux__) static jfieldID attrs_st_birthtime_sec; #endif #if defined(__linux__) // Linux has nsec granularity if supported static jfieldID attrs_st_birthtime_nsec; #endif static jfieldID attrs_birthtime_available; static jfieldID attrs_f_frsize; static jfieldID attrs_f_blocks; static jfieldID attrs_f_bfree; static jfieldID attrs_f_bavail; static jfieldID entry_name; static jfieldID entry_dir; static jfieldID entry_fstype; static jfieldID entry_options; static jfieldID entry_dev; /** * System calls that may not be available at run time. */ typedef int openat_func(int, const char *, int, ...); typedef int fstatat_func(int, const char *, struct stat *, int); typedef int unlinkat_func(int, const char*, int); typedef int renameat_func(int, const char*, int, const char*); typedef DIR* fdopendir_func(int); #if defined(__linux__) typedef int statx_func(int dirfd, const char *restrict pathname, int flags, unsigned int mask, struct my_statx *restrict statxbuf); #endif static openat_func* my_openat_func = NULL; static fstatat_func* my_fstatat_func = NULL; static unlinkat_func* my_unlinkat_func = NULL; static renameat_func* my_renameat_func = NULL; static fdopendir_func* my_fdopendir_func = NULL; #if defined(__linux__) static statx_func* my_statx_func = NULL; #endif /** * fstatat missing from glibc on Linux. */ #if defined(__linux__) && (defined(__i386) || defined(__arm__)) #define FSTATAT64_SYSCALL_AVAILABLE static int fstatat_wrapper(int dfd, const char *path, struct stat *statbuf, int flag) { #ifndef __NR_fstatat64 #define __NR_fstatat64 300 #endif return syscall(__NR_fstatat64, dfd, path, statbuf, flag); } #endif #if defined(__linux__) && defined(_LP64) && defined(__NR_newfstatat) #define FSTATAT64_SYSCALL_AVAILABLE static int fstatat_wrapper(int dfd, const char *path, struct stat *statbuf, int flag) { return syscall(__NR_newfstatat, dfd, path, statbuf, flag); } #endif #if defined(__linux__) static int statx_wrapper(int dirfd, const char *restrict pathname, int flags, unsigned int mask, struct my_statx *restrict statxbuf) { return (*my_statx_func)(dirfd, pathname, flags, mask, statxbuf); } #endif /** * Call this to throw an internal UnixException when a system/library * call fails */ static void throwUnixException(JNIEnv* env, int errnum) { jobject x = JNU_NewObjectByName(env, "sun/nio/fs/UnixException", "(I)V", errnum); if (x != NULL) { (*env)->Throw(env, x); } } /** * Initialization */ JNIEXPORT jint JNICALL Java_sun_nio_fs_UnixNativeDispatcher_init(JNIEnv* env, jclass this) { jint capabilities = 0; jclass clazz; clazz = (*env)->FindClass(env, "sun/nio/fs/UnixFileAttributes"); CHECK_NULL_RETURN(clazz, 0); attrs_st_mode = (*env)->GetFieldID(env, clazz, "st_mode", "I"); CHECK_NULL_RETURN(attrs_st_mode, 0); attrs_st_ino = (*env)->GetFieldID(env, clazz, "st_ino", "J"); CHECK_NULL_RETURN(attrs_st_ino, 0); attrs_st_dev = (*env)->GetFieldID(env, clazz, "st_dev", "J"); CHECK_NULL_RETURN(attrs_st_dev, 0); attrs_st_rdev = (*env)->GetFieldID(env, clazz, "st_rdev", "J"); CHECK_NULL_RETURN(attrs_st_rdev, 0); attrs_st_nlink = (*env)->GetFieldID(env, clazz, "st_nlink", "I"); CHECK_NULL_RETURN(attrs_st_nlink, 0); attrs_st_uid = (*env)->GetFieldID(env, clazz, "st_uid", "I"); CHECK_NULL_RETURN(attrs_st_uid, 0); attrs_st_gid = (*env)->GetFieldID(env, clazz, "st_gid", "I"); CHECK_NULL_RETURN(attrs_st_gid, 0); attrs_st_size = (*env)->GetFieldID(env, clazz, "st_size", "J"); CHECK_NULL_RETURN(attrs_st_size, 0); attrs_st_atime_sec = (*env)->GetFieldID(env, clazz, "st_atime_sec", "J"); CHECK_NULL_RETURN(attrs_st_atime_sec, 0); attrs_st_atime_nsec = (*env)->GetFieldID(env, clazz, "st_atime_nsec", "J"); CHECK_NULL_RETURN(attrs_st_atime_nsec, 0); attrs_st_mtime_sec = (*env)->GetFieldID(env, clazz, "st_mtime_sec", "J"); CHECK_NULL_RETURN(attrs_st_mtime_sec, 0); attrs_st_mtime_nsec = (*env)->GetFieldID(env, clazz, "st_mtime_nsec", "J"); CHECK_NULL_RETURN(attrs_st_mtime_nsec, 0); attrs_st_ctime_sec = (*env)->GetFieldID(env, clazz, "st_ctime_sec", "J"); CHECK_NULL_RETURN(attrs_st_ctime_sec, 0); attrs_st_ctime_nsec = (*env)->GetFieldID(env, clazz, "st_ctime_nsec", "J"); CHECK_NULL_RETURN(attrs_st_ctime_nsec, 0); #if defined(_DARWIN_FEATURE_64_BIT_INODE) || defined(__linux__) attrs_st_birthtime_sec = (*env)->GetFieldID(env, clazz, "st_birthtime_sec", "J"); CHECK_NULL_RETURN(attrs_st_birthtime_sec, 0); #endif #if defined (__linux__) // Linux has nsec granularity attrs_st_birthtime_nsec = (*env)->GetFieldID(env, clazz, "st_birthtime_nsec", "J"); CHECK_NULL_RETURN(attrs_st_birthtime_nsec, 0); #endif attrs_birthtime_available = (*env)->GetFieldID(env, clazz, "birthtime_available", "Z"); CHECK_NULL_RETURN(attrs_birthtime_available, 0); clazz = (*env)->FindClass(env, "sun/nio/fs/UnixFileStoreAttributes"); CHECK_NULL_RETURN(clazz, 0); attrs_f_frsize = (*env)->GetFieldID(env, clazz, "f_frsize", "J"); CHECK_NULL_RETURN(attrs_f_frsize, 0); attrs_f_blocks = (*env)->GetFieldID(env, clazz, "f_blocks", "J"); CHECK_NULL_RETURN(attrs_f_blocks, 0); attrs_f_bfree = (*env)->GetFieldID(env, clazz, "f_bfree", "J"); CHECK_NULL_RETURN(attrs_f_bfree, 0); attrs_f_bavail = (*env)->GetFieldID(env, clazz, "f_bavail", "J"); CHECK_NULL_RETURN(attrs_f_bavail, 0); clazz = (*env)->FindClass(env, "sun/nio/fs/UnixMountEntry"); CHECK_NULL_RETURN(clazz, 0); entry_name = (*env)->GetFieldID(env, clazz, "name", "[B"); CHECK_NULL_RETURN(entry_name, 0); entry_dir = (*env)->GetFieldID(env, clazz, "dir", "[B"); CHECK_NULL_RETURN(entry_dir, 0); entry_fstype = (*env)->GetFieldID(env, clazz, "fstype", "[B"); CHECK_NULL_RETURN(entry_fstype, 0); entry_options = (*env)->GetFieldID(env, clazz, "opts", "[B"); CHECK_NULL_RETURN(entry_options, 0); entry_dev = (*env)->GetFieldID(env, clazz, "dev", "J"); CHECK_NULL_RETURN(entry_dev, 0); /* system calls that might not be available at run time */ my_unlinkat_func = (unlinkat_func*) dlsym(RTLD_DEFAULT, "unlinkat"); my_renameat_func = (renameat_func*) dlsym(RTLD_DEFAULT, "renameat"); #if defined(_AIX) // Make sure we link to the 64-bit version of the function my_openat_func = (openat_func*) dlsym(RTLD_DEFAULT, "open64at"); my_fstatat_func = (fstatat_func*) dlsym(RTLD_DEFAULT, "stat64at"); my_fdopendir_func = (fdopendir_func*) dlsym(RTLD_DEFAULT, "fdopendir64"); #elif defined(_ALLBSD_SOURCE) my_openat_func = (openat_func*) openat; my_fstatat_func = (fstatat_func*) fstatat; my_fdopendir_func = (fdopendir_func*) fdopendir; #else // Make sure we link to the 64-bit version of the functions my_openat_func = (openat_func*) dlsym(RTLD_DEFAULT, "openat64"); my_fstatat_func = (fstatat_func*) dlsym(RTLD_DEFAULT, "fstatat64"); my_fdopendir_func = (fdopendir_func*) dlsym(RTLD_DEFAULT, "fdopendir"); #endif #if defined(FSTATAT64_SYSCALL_AVAILABLE) /* fstatat64 missing from glibc */ if (my_fstatat_func == NULL) my_fstatat_func = (fstatat_func*)&fstatat_wrapper; #endif /* supports openat, etc. */ if (my_openat_func != NULL && my_fstatat_func != NULL && my_unlinkat_func != NULL && my_renameat_func != NULL && my_fdopendir_func != NULL) { capabilities |= sun_nio_fs_UnixNativeDispatcher_SUPPORTS_OPENAT; } /* supports file birthtime */ #ifdef _DARWIN_FEATURE_64_BIT_INODE capabilities |= sun_nio_fs_UnixNativeDispatcher_SUPPORTS_BIRTHTIME; #endif #if defined(__linux__) my_statx_func = (statx_func*) dlsym(RTLD_DEFAULT, "statx"); if (my_statx_func != NULL) { capabilities |= sun_nio_fs_UnixNativeDispatcher_SUPPORTS_BIRTHTIME; } #endif /* supports extended attributes */ #if defined(_SYS_XATTR_H) || defined(_SYS_XATTR_H_) || defined(_AIX) capabilities |= sun_nio_fs_UnixNativeDispatcher_SUPPORTS_XATTR; #endif #if defined(__linux__) // Linux 6.6+ supports AT_SYMLINK_NOFOLLOW. glibc 2.32+ also provides emulation for older kernels. if (fchmodat(AT_FDCWD, "", 0, AT_SYMLINK_NOFOLLOW) == 0 || errno != ENOTSUP) { capabilities |= sun_nio_fs_UnixNativeDispatcher_SUPPORTS_FCHMODAT_NOFOLLOW; } #else capabilities |= sun_nio_fs_UnixNativeDispatcher_SUPPORTS_FCHMODAT_NOFOLLOW; #endif return capabilities; } JNIEXPORT jbyteArray JNICALL Java_sun_nio_fs_UnixNativeDispatcher_getcwd(JNIEnv* env, jclass this) { jbyteArray result = NULL; char buf[PATH_MAX+1]; /* EINTR not listed as a possible error */ char* cwd = getcwd(buf, sizeof(buf)); if (cwd == NULL) { throwUnixException(env, errno); } else { jsize len = (jsize)strlen(buf); result = (*env)->NewByteArray(env, len); if (result != NULL) { (*env)->SetByteArrayRegion(env, result, 0, len, (jbyte*)buf); } } return result; } JNIEXPORT jbyteArray Java_sun_nio_fs_UnixNativeDispatcher_strerror(JNIEnv* env, jclass this, jint error) { char tmpbuf[1024]; jsize len; jbyteArray bytes; getErrorString((int)errno, tmpbuf, sizeof(tmpbuf)); len = strlen(tmpbuf); bytes = (*env)->NewByteArray(env, len); if (bytes != NULL) { (*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)tmpbuf); } return bytes; } JNIEXPORT jint Java_sun_nio_fs_UnixNativeDispatcher_dup(JNIEnv* env, jclass this, jint fd) { int res = -1; RESTARTABLE(dup((int)fd), res); if (res == -1) { throwUnixException(env, errno); } return (jint)res; } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_rewind(JNIEnv* env, jclass this, jlong stream) { FILE* fp = jlong_to_ptr(stream); int saved_errno; errno = 0; rewind(fp); saved_errno = errno; if (ferror(fp)) { throwUnixException(env, saved_errno); } } /** * This function returns line length without NUL terminator or -1 on EOF. */ JNIEXPORT jint JNICALL Java_sun_nio_fs_UnixNativeDispatcher_getlinelen(JNIEnv* env, jclass this, jlong stream) { FILE* fp = jlong_to_ptr(stream); size_t lineSize = 0; char * lineBuffer = NULL; int saved_errno; ssize_t res = getline(&lineBuffer, &lineSize, fp); saved_errno = errno; /* Should free lineBuffer no matter result, according to man page */ if (lineBuffer != NULL) free(lineBuffer); if (feof(fp)) return -1; /* On successful return res >= 0, otherwise res is -1 */ if (res == -1) throwUnixException(env, saved_errno); if (res > INT_MAX) throwUnixException(env, EOVERFLOW); return (jint)res; } JNIEXPORT jint JNICALL Java_sun_nio_fs_UnixNativeDispatcher_open0(JNIEnv* env, jclass this, jlong pathAddress, jint oflags, jint mode) { jint fd; const char* path = (const char*)jlong_to_ptr(pathAddress); RESTARTABLE(open(path, (int)oflags, (mode_t)mode), fd); if (fd == -1) { throwUnixException(env, errno); } return fd; } JNIEXPORT jint JNICALL Java_sun_nio_fs_UnixNativeDispatcher_openat0(JNIEnv* env, jclass this, jint dfd, jlong pathAddress, jint oflags, jint mode) { jint fd; const char* path = (const char*)jlong_to_ptr(pathAddress); if (my_openat_func == NULL) { JNU_ThrowInternalError(env, "should not reach here"); return -1; } RESTARTABLE((*my_openat_func)(dfd, path, (int)oflags, (mode_t)mode), fd); if (fd == -1) { throwUnixException(env, errno); } return fd; } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_close0(JNIEnv* env, jclass this, jint fd) { int res; #if defined(_AIX) /* AIX allows close to be restarted after EINTR */ RESTARTABLE(close((int)fd), res); #else res = close((int)fd); #endif if (res == -1 && errno != EINTR) { throwUnixException(env, errno); } } JNIEXPORT jint JNICALL Java_sun_nio_fs_UnixNativeDispatcher_read0(JNIEnv* env, jclass this, jint fd, jlong address, jint nbytes) { ssize_t n; void* bufp = jlong_to_ptr(address); RESTARTABLE(read((int)fd, bufp, (size_t)nbytes), n); if (n == -1) { throwUnixException(env, errno); } return (jint)n; } JNIEXPORT jint JNICALL Java_sun_nio_fs_UnixNativeDispatcher_write0(JNIEnv* env, jclass this, jint fd, jlong address, jint nbytes) { ssize_t n; void* bufp = jlong_to_ptr(address); RESTARTABLE(write((int)fd, bufp, (size_t)nbytes), n); if (n == -1) { throwUnixException(env, errno); } return (jint)n; } #if defined(__linux__) /** * Copy statx members into sun.nio.fs.UnixFileAttributes */ static void copy_statx_attributes(JNIEnv* env, struct my_statx* buf, jobject attrs) { (*env)->SetIntField(env, attrs, attrs_st_mode, (jint)buf->stx_mode); (*env)->SetLongField(env, attrs, attrs_st_ino, (jlong)buf->stx_ino); (*env)->SetIntField(env, attrs, attrs_st_nlink, (jint)buf->stx_nlink); (*env)->SetIntField(env, attrs, attrs_st_uid, (jint)buf->stx_uid); (*env)->SetIntField(env, attrs, attrs_st_gid, (jint)buf->stx_gid); (*env)->SetLongField(env, attrs, attrs_st_size, (jlong)buf->stx_size); (*env)->SetLongField(env, attrs, attrs_st_atime_sec, (jlong)buf->stx_atime.tv_sec); (*env)->SetLongField(env, attrs, attrs_st_mtime_sec, (jlong)buf->stx_mtime.tv_sec); (*env)->SetLongField(env, attrs, attrs_st_ctime_sec, (jlong)buf->stx_ctime.tv_sec); // Check mask for birth time and set flag accordingly. The birth time is // filled in if and only if the STATX_BTIME bit is set in the mask. // Although the statx system call might be supported by the operating // system, the birth time is not necessarily supported by the file system. if ((buf->stx_mask & STATX_BTIME) != 0) { (*env)->SetBooleanField(env, attrs, attrs_birthtime_available, (jboolean)JNI_TRUE); (*env)->SetLongField(env, attrs, attrs_st_birthtime_sec, (jlong)buf->stx_btime.tv_sec); (*env)->SetLongField(env, attrs, attrs_st_birthtime_nsec, (jlong)buf->stx_btime.tv_nsec); } else { (*env)->SetBooleanField(env, attrs, attrs_birthtime_available, (jboolean)JNI_FALSE); } (*env)->SetLongField(env, attrs, attrs_st_atime_nsec, (jlong)buf->stx_atime.tv_nsec); (*env)->SetLongField(env, attrs, attrs_st_mtime_nsec, (jlong)buf->stx_mtime.tv_nsec); (*env)->SetLongField(env, attrs, attrs_st_ctime_nsec, (jlong)buf->stx_ctime.tv_nsec); // convert statx major:minor to dev_t using makedev dev_t dev = makedev(buf->stx_dev_major, buf->stx_dev_minor); dev_t rdev = makedev(buf->stx_rdev_major, buf->stx_rdev_minor); (*env)->SetLongField(env, attrs, attrs_st_dev, (jlong)dev); (*env)->SetLongField(env, attrs, attrs_st_rdev, (jlong)rdev); } #endif /** * Copy stat members into sun.nio.fs.UnixFileAttributes */ static void copy_stat_attributes(JNIEnv* env, struct stat* buf, jobject attrs) { (*env)->SetIntField(env, attrs, attrs_st_mode, (jint)buf->st_mode); (*env)->SetLongField(env, attrs, attrs_st_ino, (jlong)buf->st_ino); (*env)->SetLongField(env, attrs, attrs_st_dev, (jlong)buf->st_dev); (*env)->SetLongField(env, attrs, attrs_st_rdev, (jlong)buf->st_rdev); (*env)->SetIntField(env, attrs, attrs_st_nlink, (jint)buf->st_nlink); (*env)->SetIntField(env, attrs, attrs_st_uid, (jint)buf->st_uid); (*env)->SetIntField(env, attrs, attrs_st_gid, (jint)buf->st_gid); (*env)->SetLongField(env, attrs, attrs_st_size, (jlong)buf->st_size); (*env)->SetLongField(env, attrs, attrs_st_atime_sec, (jlong)buf->st_atime); (*env)->SetLongField(env, attrs, attrs_st_mtime_sec, (jlong)buf->st_mtime); (*env)->SetLongField(env, attrs, attrs_st_ctime_sec, (jlong)buf->st_ctime); #ifdef _DARWIN_FEATURE_64_BIT_INODE // birthtime_available defaults to 'false'; on Darwin, it is always true (*env)->SetLongField(env, attrs, attrs_st_birthtime_sec, (jlong)buf->st_birthtime); (*env)->SetBooleanField(env, attrs, attrs_birthtime_available, (jboolean)JNI_TRUE); // rely on default value of 0 for st_birthtime_nsec field on Darwin #endif #ifndef MACOSX (*env)->SetLongField(env, attrs, attrs_st_atime_nsec, (jlong)buf->st_atim.tv_nsec); (*env)->SetLongField(env, attrs, attrs_st_mtime_nsec, (jlong)buf->st_mtim.tv_nsec); (*env)->SetLongField(env, attrs, attrs_st_ctime_nsec, (jlong)buf->st_ctim.tv_nsec); #else (*env)->SetLongField(env, attrs, attrs_st_atime_nsec, (jlong)buf->st_atimespec.tv_nsec); (*env)->SetLongField(env, attrs, attrs_st_mtime_nsec, (jlong)buf->st_mtimespec.tv_nsec); (*env)->SetLongField(env, attrs, attrs_st_ctime_nsec, (jlong)buf->st_ctimespec.tv_nsec); #endif } JNIEXPORT jint JNICALL Java_sun_nio_fs_UnixNativeDispatcher_stat0(JNIEnv* env, jclass this, jlong pathAddress, jobject attrs) { int err; struct stat buf; const char* path = (const char*)jlong_to_ptr(pathAddress); #if defined(__linux__) struct my_statx statx_buf; int flags = AT_STATX_SYNC_AS_STAT; unsigned int mask = LOCAL_STATX_ALL; if (my_statx_func != NULL) { // Prefer statx over stat on Linux if it's available RESTARTABLE(statx_wrapper(AT_FDCWD, path, flags, mask, &statx_buf), err); if (err == 0) { copy_statx_attributes(env, &statx_buf, attrs); return 0; } else { return errno; } } #endif RESTARTABLE(stat(path, &buf), err); if (err == 0) { copy_stat_attributes(env, &buf, attrs); return 0; } else { return errno; } } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_lstat0(JNIEnv* env, jclass this, jlong pathAddress, jobject attrs) { int err; struct stat buf; const char* path = (const char*)jlong_to_ptr(pathAddress); #if defined(__linux__) struct my_statx statx_buf; int flags = AT_STATX_SYNC_AS_STAT | AT_SYMLINK_NOFOLLOW; unsigned int mask = LOCAL_STATX_ALL; if (my_statx_func != NULL) { // Prefer statx over stat on Linux if it's available RESTARTABLE(statx_wrapper(AT_FDCWD, path, flags, mask, &statx_buf), err); if (err == 0) { copy_statx_attributes(env, &statx_buf, attrs); } else { throwUnixException(env, errno); } // statx was available, so return now return; } #endif RESTARTABLE(lstat(path, &buf), err); if (err == -1) { throwUnixException(env, errno); } else { copy_stat_attributes(env, &buf, attrs); } } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_fstat0(JNIEnv* env, jclass this, jint fd, jobject attrs) { int err; struct stat buf; #if defined(__linux__) struct my_statx statx_buf; int flags = AT_EMPTY_PATH | AT_STATX_SYNC_AS_STAT; unsigned int mask = LOCAL_STATX_ALL; if (my_statx_func != NULL) { // statx supports FD use via dirfd iff pathname is an empty string and the // AT_EMPTY_PATH flag is specified in flags RESTARTABLE(statx_wrapper((int)fd, "", flags, mask, &statx_buf), err); if (err == 0) { copy_statx_attributes(env, &statx_buf, attrs); } else { throwUnixException(env, errno); } // statx was available, so return now return; } #endif RESTARTABLE(fstat((int)fd, &buf), err); if (err == -1) { throwUnixException(env, errno); } else { copy_stat_attributes(env, &buf, attrs); } } JNIEXPORT jint JNICALL Java_sun_nio_fs_UnixNativeDispatcher_fstatat0(JNIEnv* env, jclass this, jint dfd, jlong pathAddress, jint flag, jobject attrs) { int err; struct stat buf; const char* path = (const char*)jlong_to_ptr(pathAddress); #if defined(__linux__) struct my_statx statx_buf; int flags = AT_STATX_SYNC_AS_STAT; unsigned int mask = LOCAL_STATX_ALL; if (my_statx_func != NULL) { // Prefer statx over stat on Linux if it's available if (((int)flag & AT_SYMLINK_NOFOLLOW) > 0) { // flag set in java code flags |= AT_SYMLINK_NOFOLLOW; } RESTARTABLE(statx_wrapper((int)dfd, path, flags, mask, &statx_buf), err); if (err == 0) { copy_statx_attributes(env, &statx_buf, attrs); return 0; } else { return errno; } } #endif if (my_fstatat_func == NULL) { JNU_ThrowInternalError(env, "should not reach here"); return ENOTSUP; } RESTARTABLE((*my_fstatat_func)((int)dfd, path, &buf, (int)flag), err); if (err == 0) { copy_stat_attributes(env, &buf, attrs); return 0; } else { return errno; } } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_chmod0(JNIEnv* env, jclass this, jlong pathAddress, jint mode) { int err; const char* path = (const char*)jlong_to_ptr(pathAddress); RESTARTABLE(chmod(path, (mode_t)mode), err); if (err == -1) { throwUnixException(env, errno); } } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_fchmod0(JNIEnv* env, jclass this, jint filedes, jint mode) { int err; RESTARTABLE(fchmod((int)filedes, (mode_t)mode), err); if (err == -1) { throwUnixException(env, errno); } } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_fchmodat0(JNIEnv* env, jclass this, jint fd, jlong pathAddress, jint mode, jint flag) { int err; const char* path = (const char*)jlong_to_ptr(pathAddress); RESTARTABLE(fchmodat((int)fd, path, (mode_t)mode, (int)flag), err); if (err == -1) { throwUnixException(env, errno); } } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_chown0(JNIEnv* env, jclass this, jlong pathAddress, jint uid, jint gid) { int err; const char* path = (const char*)jlong_to_ptr(pathAddress); RESTARTABLE(chown(path, (uid_t)uid, (gid_t)gid), err); if (err == -1) { throwUnixException(env, errno); } } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_lchown0(JNIEnv* env, jclass this, jlong pathAddress, jint uid, jint gid) { int err; const char* path = (const char*)jlong_to_ptr(pathAddress); RESTARTABLE(lchown(path, (uid_t)uid, (gid_t)gid), err); if (err == -1) { throwUnixException(env, errno); } } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_fchown0(JNIEnv* env, jclass this, jint filedes, jint uid, jint gid) { int err; RESTARTABLE(fchown(filedes, (uid_t)uid, (gid_t)gid), err); if (err == -1) { throwUnixException(env, errno); } } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_utimes0(JNIEnv* env, jclass this, jlong pathAddress, jlong accessTime, jlong modificationTime) { int err; struct timeval times[2]; const char* path = (const char*)jlong_to_ptr(pathAddress); times[0].tv_sec = accessTime / 1000000; times[0].tv_usec = accessTime % 1000000; times[1].tv_sec = modificationTime / 1000000; times[1].tv_usec = modificationTime % 1000000; RESTARTABLE(utimes(path, ×[0]), err); if (err == -1) { throwUnixException(env, errno); } } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_futimens0(JNIEnv* env, jclass this, jint filedes, jlong accessTime, jlong modificationTime) { struct timespec times[2]; int err = 0; times[0].tv_sec = accessTime / 1000000000; times[0].tv_nsec = accessTime % 1000000000; times[1].tv_sec = modificationTime / 1000000000; times[1].tv_nsec = modificationTime % 1000000000; RESTARTABLE(futimens(filedes, ×[0]), err); if (err == -1) { throwUnixException(env, errno); } } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_utimensat0(JNIEnv* env, jclass this, jint fd, jlong pathAddress, jlong accessTime, jlong modificationTime, jint flags) { int err; struct timespec times[2]; const char* path = (const char*)jlong_to_ptr(pathAddress); times[0].tv_sec = accessTime / 1000000000; times[0].tv_nsec = accessTime % 1000000000; times[1].tv_sec = modificationTime / 1000000000; times[1].tv_nsec = modificationTime % 1000000000; RESTARTABLE(utimensat(fd, path, ×[0], flags), err); if (err == -1) { throwUnixException(env, errno); } } JNIEXPORT jlong JNICALL Java_sun_nio_fs_UnixNativeDispatcher_opendir0(JNIEnv* env, jclass this, jlong pathAddress) { DIR* dir; const char* path = (const char*)jlong_to_ptr(pathAddress); /* EINTR not listed as a possible error */ dir = opendir(path); if (dir == NULL) { throwUnixException(env, errno); } return ptr_to_jlong(dir); } JNIEXPORT jlong JNICALL Java_sun_nio_fs_UnixNativeDispatcher_fdopendir(JNIEnv* env, jclass this, int dfd) { DIR* dir; if (my_fdopendir_func == NULL) { JNU_ThrowInternalError(env, "should not reach here"); return (jlong)-1; } /* EINTR not listed as a possible error */ dir = (*my_fdopendir_func)((int)dfd); if (dir == NULL) { throwUnixException(env, errno); } return ptr_to_jlong(dir); } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_closedir(JNIEnv* env, jclass this, jlong dir) { DIR* dirp = jlong_to_ptr(dir); if (closedir(dirp) == -1 && errno != EINTR) { throwUnixException(env, errno); } } JNIEXPORT jbyteArray JNICALL Java_sun_nio_fs_UnixNativeDispatcher_readdir0(JNIEnv* env, jclass this, jlong value) { DIR* dirp = jlong_to_ptr(value); struct dirent* ptr; errno = 0; ptr = readdir(dirp); if (ptr == NULL) { if (errno != 0) { throwUnixException(env, errno); } return NULL; } else { jsize len = strlen(ptr->d_name); jbyteArray bytes = (*env)->NewByteArray(env, len); if (bytes != NULL) { (*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)(ptr->d_name)); } return bytes; } } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_mkdir0(JNIEnv* env, jclass this, jlong pathAddress, jint mode) { const char* path = (const char*)jlong_to_ptr(pathAddress); /* EINTR not listed as a possible error */ if (mkdir(path, (mode_t)mode) == -1) { throwUnixException(env, errno); } } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_rmdir0(JNIEnv* env, jclass this, jlong pathAddress) { const char* path = (const char*)jlong_to_ptr(pathAddress); /* EINTR not listed as a possible error */ if (rmdir(path) == -1) { throwUnixException(env, errno); } } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_link0(JNIEnv* env, jclass this, jlong existingAddress, jlong newAddress) { int err; const char* existing = (const char*)jlong_to_ptr(existingAddress); const char* newname = (const char*)jlong_to_ptr(newAddress); RESTARTABLE(link(existing, newname), err); if (err == -1) { throwUnixException(env, errno); } } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_unlink0(JNIEnv* env, jclass this, jlong pathAddress) { const char* path = (const char*)jlong_to_ptr(pathAddress); /* EINTR not listed as a possible error */ if (unlink(path) == -1) { throwUnixException(env, errno); } } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_unlinkat0(JNIEnv* env, jclass this, jint dfd, jlong pathAddress, jint flags) { const char* path = (const char*)jlong_to_ptr(pathAddress); if (my_unlinkat_func == NULL) { JNU_ThrowInternalError(env, "should not reach here"); return; } /* EINTR not listed as a possible error */ if ((*my_unlinkat_func)((int)dfd, path, (int)flags) == -1) { throwUnixException(env, errno); } } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_rename0(JNIEnv* env, jclass this, jlong fromAddress, jlong toAddress) { const char* from = (const char*)jlong_to_ptr(fromAddress); const char* to = (const char*)jlong_to_ptr(toAddress); /* EINTR not listed as a possible error */ if (rename(from, to) == -1) { throwUnixException(env, errno); } } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_renameat0(JNIEnv* env, jclass this, jint fromfd, jlong fromAddress, jint tofd, jlong toAddress) { const char* from = (const char*)jlong_to_ptr(fromAddress); const char* to = (const char*)jlong_to_ptr(toAddress); if (my_renameat_func == NULL) { JNU_ThrowInternalError(env, "should not reach here"); return; } /* EINTR not listed as a possible error */ if ((*my_renameat_func)((int)fromfd, from, (int)tofd, to) == -1) { throwUnixException(env, errno); } } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_symlink0(JNIEnv* env, jclass this, jlong targetAddress, jlong linkAddress) { const char* target = (const char*)jlong_to_ptr(targetAddress); const char* link = (const char*)jlong_to_ptr(linkAddress); /* EINTR not listed as a possible error */ if (symlink(target, link) == -1) { throwUnixException(env, errno); } } JNIEXPORT jbyteArray JNICALL Java_sun_nio_fs_UnixNativeDispatcher_readlink0(JNIEnv* env, jclass this, jlong pathAddress) { jbyteArray result = NULL; char target[PATH_MAX+1]; const char* path = (const char*)jlong_to_ptr(pathAddress); /* EINTR not listed as a possible error */ int n = readlink(path, target, sizeof(target)); if (n == -1) { throwUnixException(env, errno); } else { jsize len; if (n == sizeof(target)) { /* Traditionally readlink(2) should not return more than */ /* PATH_MAX bytes (no terminating null byte is appended). */ throwUnixException(env, ENAMETOOLONG); return NULL; } target[n] = '\0'; len = (jsize)strlen(target); result = (*env)->NewByteArray(env, len); if (result != NULL) { (*env)->SetByteArrayRegion(env, result, 0, len, (jbyte*)target); } } return result; } JNIEXPORT jbyteArray JNICALL Java_sun_nio_fs_UnixNativeDispatcher_realpath0(JNIEnv* env, jclass this, jlong pathAddress) { jbyteArray result = NULL; char resolved[PATH_MAX+1]; const char* path = (const char*)jlong_to_ptr(pathAddress); /* EINTR not listed as a possible error */ if (realpath(path, resolved) == NULL) { throwUnixException(env, errno); } else { jsize len = (jsize)strlen(resolved); result = (*env)->NewByteArray(env, len); if (result != NULL) { (*env)->SetByteArrayRegion(env, result, 0, len, (jbyte*)resolved); } } return result; } JNIEXPORT jint JNICALL Java_sun_nio_fs_UnixNativeDispatcher_access0(JNIEnv* env, jclass this, jlong pathAddress, jint amode) { int err; const char* path = (const char*)jlong_to_ptr(pathAddress); RESTARTABLE(access(path, (int)amode), err); return (err == -1) ? errno : 0; } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_statvfs0(JNIEnv* env, jclass this, jlong pathAddress, jobject attrs) { int err; #ifdef MACOSX struct statfs buf; #else struct statvfs buf; #endif const char* path = (const char*)jlong_to_ptr(pathAddress); #ifdef MACOSX RESTARTABLE(statfs(path, &buf), err); #else RESTARTABLE(statvfs(path, &buf), err); #endif if (err == -1) { throwUnixException(env, errno); } else { #ifdef _AIX /* AIX returns ULONG_MAX in buf.f_blocks for the /proc file system. */ /* This is too big for a Java signed long and fools various tests. */ if (buf.f_blocks == ULONG_MAX) { buf.f_blocks = 0; } /* The number of free or available blocks can never exceed the total number of blocks */ if (buf.f_blocks == 0) { buf.f_bfree = 0; buf.f_bavail = 0; } #endif #ifdef MACOSX (*env)->SetLongField(env, attrs, attrs_f_frsize, long_to_jlong(buf.f_bsize)); #else (*env)->SetLongField(env, attrs, attrs_f_frsize, long_to_jlong(buf.f_frsize)); #endif (*env)->SetLongField(env, attrs, attrs_f_blocks, long_to_jlong(buf.f_blocks)); (*env)->SetLongField(env, attrs, attrs_f_bfree, long_to_jlong(buf.f_bfree)); (*env)->SetLongField(env, attrs, attrs_f_bavail, long_to_jlong(buf.f_bavail)); } } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_mknod0(JNIEnv* env, jclass this, jlong pathAddress, jint mode, jlong dev) { int err; const char* path = (const char*)jlong_to_ptr(pathAddress); RESTARTABLE(mknod(path, (mode_t)mode, (dev_t)dev), err); if (err == -1) { throwUnixException(env, errno); } } JNIEXPORT jbyteArray JNICALL Java_sun_nio_fs_UnixNativeDispatcher_getpwuid(JNIEnv* env, jclass this, jint uid) { jbyteArray result = NULL; int buflen; char* pwbuf; /* allocate buffer for password record */ buflen = (int)sysconf(_SC_GETPW_R_SIZE_MAX); if (buflen == -1) buflen = ENT_BUF_SIZE; pwbuf = (char*)malloc(buflen); if (pwbuf == NULL) { JNU_ThrowOutOfMemoryError(env, "native heap"); } else { struct passwd pwent; struct passwd* p = NULL; int res = 0; errno = 0; RESTARTABLE(getpwuid_r((uid_t)uid, &pwent, pwbuf, (size_t)buflen, &p), res); if (res != 0 || p == NULL || p->pw_name == NULL || *(p->pw_name) == '\0') { /* not found or error */ if (errno == 0) errno = ENOENT; throwUnixException(env, errno); } else { jsize len = strlen(p->pw_name); result = (*env)->NewByteArray(env, len); if (result != NULL) { (*env)->SetByteArrayRegion(env, result, 0, len, (jbyte*)(p->pw_name)); } } free(pwbuf); } return result; } JNIEXPORT jbyteArray JNICALL Java_sun_nio_fs_UnixNativeDispatcher_getgrgid(JNIEnv* env, jclass this, jint gid) { jbyteArray result = NULL; int buflen; int retry; /* initial size of buffer for group record */ buflen = (int)sysconf(_SC_GETGR_R_SIZE_MAX); if (buflen == -1) buflen = ENT_BUF_SIZE; do { struct group grent; struct group* g = NULL; int res = 0; char* grbuf = (char*)malloc(buflen); if (grbuf == NULL) { JNU_ThrowOutOfMemoryError(env, "native heap"); return NULL; } errno = 0; RESTARTABLE(getgrgid_r((gid_t)gid, &grent, grbuf, (size_t)buflen, &g), res); retry = 0; if (res != 0 || g == NULL || g->gr_name == NULL || *(g->gr_name) == '\0') { /* not found or error */ if (errno == ERANGE) { /* insufficient buffer size so need larger buffer */ buflen += ENT_BUF_SIZE; retry = 1; } else { if (errno == 0) errno = ENOENT; throwUnixException(env, errno); } } else { jsize len = strlen(g->gr_name); result = (*env)->NewByteArray(env, len); if (result != NULL) { (*env)->SetByteArrayRegion(env, result, 0, len, (jbyte*)(g->gr_name)); } } free(grbuf); } while (retry); return result; } JNIEXPORT jint JNICALL Java_sun_nio_fs_UnixNativeDispatcher_getpwnam0(JNIEnv* env, jclass this, jlong nameAddress) { jint uid = -1; int buflen; char* pwbuf; /* allocate buffer for password record */ buflen = (int)sysconf(_SC_GETPW_R_SIZE_MAX); if (buflen == -1) buflen = ENT_BUF_SIZE; pwbuf = (char*)malloc(buflen); if (pwbuf == NULL) { JNU_ThrowOutOfMemoryError(env, "native heap"); } else { struct passwd pwent; struct passwd* p = NULL; int res = 0; const char* name = (const char*)jlong_to_ptr(nameAddress); errno = 0; RESTARTABLE(getpwnam_r(name, &pwent, pwbuf, (size_t)buflen, &p), res); if (res != 0 || p == NULL || p->pw_name == NULL || *(p->pw_name) == '\0') { /* not found or error */ if (errno != 0 && errno != ENOENT && errno != ESRCH && errno != EBADF && errno != EPERM) { throwUnixException(env, errno); } } else { uid = p->pw_uid; } free(pwbuf); } return uid; } JNIEXPORT jint JNICALL Java_sun_nio_fs_UnixNativeDispatcher_getgrnam0(JNIEnv* env, jclass this, jlong nameAddress) { jint gid = -1; int buflen, retry; /* initial size of buffer for group record */ buflen = (int)sysconf(_SC_GETGR_R_SIZE_MAX); if (buflen == -1) buflen = ENT_BUF_SIZE; do { struct group grent; struct group* g = NULL; int res = 0; char *grbuf; const char* name = (const char*)jlong_to_ptr(nameAddress); grbuf = (char*)malloc(buflen); if (grbuf == NULL) { JNU_ThrowOutOfMemoryError(env, "native heap"); return -1; } errno = 0; RESTARTABLE(getgrnam_r(name, &grent, grbuf, (size_t)buflen, &g), res); retry = 0; if (res != 0 || g == NULL || g->gr_name == NULL || *(g->gr_name) == '\0') { /* not found or error */ if (errno != 0 && errno != ENOENT && errno != ESRCH && errno != EBADF && errno != EPERM) { if (errno == ERANGE) { /* insufficient buffer size so need larger buffer */ buflen += ENT_BUF_SIZE; retry = 1; } else { throwUnixException(env, errno); } } } else { gid = g->gr_gid; } free(grbuf); } while (retry); return gid; } JNIEXPORT jint JNICALL Java_sun_nio_fs_UnixNativeDispatcher_fgetxattr0(JNIEnv* env, jclass clazz, jint fd, jlong nameAddress, jlong valueAddress, jint valueLen) { size_t res = -1; const char* name = jlong_to_ptr(nameAddress); void* value = jlong_to_ptr(valueAddress); #ifdef __linux__ res = fgetxattr(fd, name, value, valueLen); #elif defined(_ALLBSD_SOURCE) res = fgetxattr(fd, name, value, valueLen, 0, 0); #elif defined(_AIX) res = fgetea(fd, name, value, valueLen); #else throwUnixException(env, ENOTSUP); #endif if (res == (size_t)-1) throwUnixException(env, errno); return (jint)res; } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_fsetxattr0(JNIEnv* env, jclass clazz, jint fd, jlong nameAddress, jlong valueAddress, jint valueLen) { int res = -1; const char* name = jlong_to_ptr(nameAddress); void* value = jlong_to_ptr(valueAddress); #ifdef __linux__ res = fsetxattr(fd, name, value, valueLen, 0); #elif defined(_ALLBSD_SOURCE) res = fsetxattr(fd, name, value, valueLen, 0, 0); #elif defined(_AIX) res = fsetea(fd, name, value, valueLen, 0); #else throwUnixException(env, ENOTSUP); #endif if (res == -1) throwUnixException(env, errno); } JNIEXPORT void JNICALL Java_sun_nio_fs_UnixNativeDispatcher_fremovexattr0(JNIEnv* env, jclass clazz, jint fd, jlong nameAddress) { int res = -1; const char* name = jlong_to_ptr(nameAddress); #ifdef __linux__ res = fremovexattr(fd, name); #elif defined(_ALLBSD_SOURCE) res = fremovexattr(fd, name, 0); #elif defined(_AIX) res = fremoveea(fd, name); #else throwUnixException(env, ENOTSUP); #endif if (res == -1) throwUnixException(env, errno); } JNIEXPORT jint JNICALL Java_sun_nio_fs_UnixNativeDispatcher_flistxattr(JNIEnv* env, jclass clazz, jint fd, jlong listAddress, jint size) { size_t res = -1; char* list = jlong_to_ptr(listAddress); #ifdef __linux__ res = flistxattr(fd, list, (size_t)size); #elif defined(_ALLBSD_SOURCE) res = flistxattr(fd, list, (size_t)size, 0); #elif defined(_AIX) res = flistea(fd, list, (size_t)size); #else throwUnixException(env, ENOTSUP); #endif if (res == (size_t)-1) throwUnixException(env, errno); return (jint)res; }