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jdk/src/java.base/unix/native/libnio/fs/UnixNativeDispatcher.c

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/*
* Copyright (c) 2008, 2024, 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
/* For POSIX-compliant getpwuid_r */
#include <pwd.h>
#include <grp.h>
#ifdef __linux__
#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.
#ifndef __GLIBC__
// Alpine doesn't know these types, define them
typedef unsigned int __uint32_t;
typedef unsigned short __uint16_t;
typedef unsigned long int __uint64_t;
#endif
/*
* 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 int futimes_func(int, const struct timeval *);
typedef int futimens_func(int, const struct timespec *);
typedef int lutimes_func(const char *, const struct timeval *);
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);
typedef int utimensat_func(int dirfd, const char *pathname,
const struct timespec[2], int flags);
#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 futimes_func* my_futimes_func = NULL;
static futimens_func* my_futimens_func = NULL;
static lutimes_func* my_lutimes_func = NULL;
static fdopendir_func* my_fdopendir_func = NULL;
#if defined(__linux__)
static statx_func* my_statx_func = NULL;
static utimensat_func* my_utimensat_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
#if defined(__linux__) && defined(__arm__)
/**
* Lookup functions with time_t parameter. Try to use 64 bit symbol
* if sizeof(time_t) exceeds 32 bit.
*/
static void* lookup_time_t_function(const char* symbol, const char* symbol64) {
void *func_ptr = NULL;
if (sizeof(time_t) > 4) {
func_ptr = dlsym(RTLD_DEFAULT, symbol64);
}
if (func_ptr == NULL) {
return dlsym(RTLD_DEFAULT, symbol);
}
return func_ptr;
}
#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 */
#if defined(_ALLBSD_SOURCE)
my_openat_func = (openat_func*) openat;
my_fstatat_func = (fstatat_func*) fstatat;
#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");
#endif
my_unlinkat_func = (unlinkat_func*) dlsym(RTLD_DEFAULT, "unlinkat");
my_renameat_func = (renameat_func*) dlsym(RTLD_DEFAULT, "renameat");
#if defined(__linux__) && defined(__arm__)
my_futimes_func = (futimes_func*) lookup_time_t_function("futimes",
"__futimes64");
my_lutimes_func = (lutimes_func*) lookup_time_t_function("lutimes",
"__lutimes64");
my_futimens_func = (futimens_func*) lookup_time_t_function("futimens",
"__futimens64");
#else
my_futimes_func = (futimes_func*) dlsym(RTLD_DEFAULT, "futimes");
my_lutimes_func = (lutimes_func*) dlsym(RTLD_DEFAULT, "lutimes");
my_futimens_func = (futimens_func*) dlsym(RTLD_DEFAULT, "futimens");
#endif
#if defined(_AIX)
// Make sure we link to the 64-bit version of the function
my_fdopendir_func = (fdopendir_func*) dlsym(RTLD_DEFAULT, "fdopendir64");
#elif defined(_ALLBSD_SOURCE)
my_fdopendir_func = (fdopendir_func*) fdopendir;
#else
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 futimes, futimens, and/or lutimes */
#ifdef _ALLBSD_SOURCE
capabilities |= sun_nio_fs_UnixNativeDispatcher_SUPPORTS_FUTIMES;
capabilities |= sun_nio_fs_UnixNativeDispatcher_SUPPORTS_LUTIMES;
#else
if (my_futimes_func != NULL)
capabilities |= sun_nio_fs_UnixNativeDispatcher_SUPPORTS_FUTIMES;
if (my_lutimes_func != NULL)
capabilities |= sun_nio_fs_UnixNativeDispatcher_SUPPORTS_LUTIMES;
#endif
if (my_futimens_func != NULL)
capabilities |= sun_nio_fs_UnixNativeDispatcher_SUPPORTS_FUTIMENS;
/* supports openat, etc. */
if (my_openat_func != NULL && my_fstatat_func != NULL &&
my_unlinkat_func != NULL && my_renameat_func != NULL &&
my_futimes_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;
}
my_utimensat_func = (utimensat_func*) dlsym(RTLD_DEFAULT, "utimensat");
if (my_utimensat_func != NULL) {
capabilities |= sun_nio_fs_UnixNativeDispatcher_SUPPORTS_UTIMENSAT;
}
#endif
/* supports extended attributes */
#if defined(_SYS_XATTR_H) || defined(_SYS_XATTR_H_)
capabilities |= sun_nio_fs_UnixNativeDispatcher_SUPPORTS_XATTR;
#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 void 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);
} else {
throwUnixException(env, errno);
}
// statx was available, so return now
return;
}
#endif
if (my_fstatat_func == NULL) {
JNU_ThrowInternalError(env, "should not reach here");
return;
}
RESTARTABLE((*my_fstatat_func)((int)dfd, path, &buf, (int)flag), err);
if (err == -1) {
throwUnixException(env, errno);
} else {
copy_stat_attributes(env, &buf, attrs);
}
}
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_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, &times[0]), err);
if (err == -1) {
throwUnixException(env, errno);
}
}
JNIEXPORT void JNICALL
Java_sun_nio_fs_UnixNativeDispatcher_futimes0(JNIEnv* env, jclass this, jint filedes,
jlong accessTime, jlong modificationTime)
{
struct timeval times[2];
int err = 0;
times[0].tv_sec = accessTime / 1000000;
times[0].tv_usec = accessTime % 1000000;
times[1].tv_sec = modificationTime / 1000000;
times[1].tv_usec = modificationTime % 1000000;
#ifdef _ALLBSD_SOURCE
RESTARTABLE(futimes(filedes, &times[0]), err);
#else
if (my_futimes_func == NULL) {
JNU_ThrowInternalError(env, "my_futimes_func is NULL");
return;
}
RESTARTABLE((*my_futimes_func)(filedes, &times[0]), err);
#endif
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;
if (my_futimens_func == NULL) {
JNU_ThrowInternalError(env, "my_futimens_func is NULL");
return;
}
RESTARTABLE((*my_futimens_func)(filedes, &times[0]), err);
if (err == -1) {
throwUnixException(env, errno);
}
}
JNIEXPORT void JNICALL
Java_sun_nio_fs_UnixNativeDispatcher_lutimes0(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;
#ifdef _ALLBSD_SOURCE
RESTARTABLE(lutimes(path, &times[0]), err);
#else
if (my_lutimes_func == NULL) {
JNU_ThrowInternalError(env, "my_lutimes_func is NULL");
return;
}
RESTARTABLE((*my_lutimes_func)(path, &times[0]), err);
#endif
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) {
#if defined(__linux__)
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;
if (my_utimensat_func == NULL) {
JNU_ThrowInternalError(env, "my_utimensat_func is NULL");
return;
}
RESTARTABLE((*my_utimensat_func)(fd, path, &times[0], flags), err);
if (err == -1) {
throwUnixException(env, errno);
}
#else
JNU_ThrowInternalError(env, "should not reach here");
#endif
}
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);
#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);
#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);
#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);
#else
throwUnixException(env, ENOTSUP);
#endif
if (res == (size_t)-1)
throwUnixException(env, errno);
return (jint)res;
}
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