Java example source code file (UnixNativeDispatcher.c)
The UnixNativeDispatcher.c Java example source code
/*
* Copyright (c) 2008, 2013, 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 <limits.h>
#include <fcntl.h>
#include <dirent.h>
#include <unistd.h>
#include <pwd.h>
#include <grp.h>
#include <errno.h>
#include <dlfcn.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
#include <sys/time.h>
#ifdef __solaris__
#include <strings.h>
#endif
#ifdef __linux__
#include <string.h>
#endif
#ifdef _ALLBSD_SOURCE
#include <string.h>
#define stat64 stat
#define statvfs64 statvfs
#define open64 open
#define fstat64 fstat
#define lstat64 lstat
#define dirent64 dirent
#define readdir64_r readdir_r
#endif
#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
#define RESTARTABLE(_cmd, _result) do { \
do { \
_result = _cmd; \
} while((_result == -1) && (errno == EINTR)); \
} while(0)
#define RESTARTABLE_RETURN_PTR(_cmd, _result) do { \
do { \
_result = _cmd; \
} while((_result == NULL) && (errno == EINTR)); \
} while(0)
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;
#ifdef _DARWIN_FEATURE_64_BIT_INODE
static jfieldID attrs_st_birthtime_sec;
#endif
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 openat64_func(int, const char *, int, ...);
typedef int fstatat64_func(int, const char *, struct stat64 *, int);
typedef int unlinkat_func(int, const char*, int);
typedef int renameat_func(int, const char*, int, const char*);
typedef int futimesat_func(int, const char *, const struct timeval *);
typedef DIR* fdopendir_func(int);
static openat64_func* my_openat64_func = NULL;
static fstatat64_func* my_fstatat64_func = NULL;
static unlinkat_func* my_unlinkat_func = NULL;
static renameat_func* my_renameat_func = NULL;
static futimesat_func* my_futimesat_func = NULL;
static fdopendir_func* my_fdopendir_func = NULL;
/**
* fstatat missing from glibc on Linux. Temporary workaround
* for x86/x64.
*/
#if defined(__linux__) && defined(__i386)
#define FSTATAT64_SYSCALL_AVAILABLE
static int fstatat64_wrapper(int dfd, const char *path,
struct stat64 *statbuf, int flag)
{
#ifndef __NR_fstatat64
#define __NR_fstatat64 300
#endif
return syscall(__NR_fstatat64, dfd, path, statbuf, flag);
}
#endif
#if defined(__linux__) && defined(__x86_64__)
#define FSTATAT64_SYSCALL_AVAILABLE
static int fstatat64_wrapper(int dfd, const char *path,
struct stat64 *statbuf, int flag)
{
#ifndef __NR_newfstatat
#define __NR_newfstatat 262
#endif
return syscall(__NR_newfstatat, dfd, path, statbuf, flag);
}
#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");
if (clazz == NULL) {
return 0;
}
attrs_st_mode = (*env)->GetFieldID(env, clazz, "st_mode", "I");
attrs_st_ino = (*env)->GetFieldID(env, clazz, "st_ino", "J");
attrs_st_dev = (*env)->GetFieldID(env, clazz, "st_dev", "J");
attrs_st_rdev = (*env)->GetFieldID(env, clazz, "st_rdev", "J");
attrs_st_nlink = (*env)->GetFieldID(env, clazz, "st_nlink", "I");
attrs_st_uid = (*env)->GetFieldID(env, clazz, "st_uid", "I");
attrs_st_gid = (*env)->GetFieldID(env, clazz, "st_gid", "I");
attrs_st_size = (*env)->GetFieldID(env, clazz, "st_size", "J");
attrs_st_atime_sec = (*env)->GetFieldID(env, clazz, "st_atime_sec", "J");
attrs_st_atime_nsec = (*env)->GetFieldID(env, clazz, "st_atime_nsec", "J");
attrs_st_mtime_sec = (*env)->GetFieldID(env, clazz, "st_mtime_sec", "J");
attrs_st_mtime_nsec = (*env)->GetFieldID(env, clazz, "st_mtime_nsec", "J");
attrs_st_ctime_sec = (*env)->GetFieldID(env, clazz, "st_ctime_sec", "J");
attrs_st_ctime_nsec = (*env)->GetFieldID(env, clazz, "st_ctime_nsec", "J");
#ifdef _DARWIN_FEATURE_64_BIT_INODE
attrs_st_birthtime_sec = (*env)->GetFieldID(env, clazz, "st_birthtime_sec", "J");
#endif
clazz = (*env)->FindClass(env, "sun/nio/fs/UnixFileStoreAttributes");
if (clazz == NULL) {
return 0;
}
attrs_f_frsize = (*env)->GetFieldID(env, clazz, "f_frsize", "J");
attrs_f_blocks = (*env)->GetFieldID(env, clazz, "f_blocks", "J");
attrs_f_bfree = (*env)->GetFieldID(env, clazz, "f_bfree", "J");
attrs_f_bavail = (*env)->GetFieldID(env, clazz, "f_bavail", "J");
clazz = (*env)->FindClass(env, "sun/nio/fs/UnixMountEntry");
if (clazz == NULL) {
return 0;
}
entry_name = (*env)->GetFieldID(env, clazz, "name", "[B");
entry_dir = (*env)->GetFieldID(env, clazz, "dir", "[B");
entry_fstype = (*env)->GetFieldID(env, clazz, "fstype", "[B");
entry_options = (*env)->GetFieldID(env, clazz, "opts", "[B");
entry_dev = (*env)->GetFieldID(env, clazz, "dev", "J");
/* system calls that might not be available at run time */
#if (defined(__solaris__) && defined(_LP64)) || defined(_ALLBSD_SOURCE)
/* Solaris 64-bit does not have openat64/fstatat64 */
my_openat64_func = (openat64_func*)dlsym(RTLD_DEFAULT, "openat");
my_fstatat64_func = (fstatat64_func*)dlsym(RTLD_DEFAULT, "fstatat");
#else
my_openat64_func = (openat64_func*) dlsym(RTLD_DEFAULT, "openat64");
my_fstatat64_func = (fstatat64_func*) dlsym(RTLD_DEFAULT, "fstatat64");
#endif
my_unlinkat_func = (unlinkat_func*) dlsym(RTLD_DEFAULT, "unlinkat");
my_renameat_func = (renameat_func*) dlsym(RTLD_DEFAULT, "renameat");
my_futimesat_func = (futimesat_func*) dlsym(RTLD_DEFAULT, "futimesat");
my_fdopendir_func = (fdopendir_func*) dlsym(RTLD_DEFAULT, "fdopendir");
#if defined(FSTATAT64_SYSCALL_AVAILABLE)
/* fstatat64 missing from glibc */
if (my_fstatat64_func == NULL)
my_fstatat64_func = (fstatat64_func*)&fstatat64_wrapper;
#endif
/* supports futimes or futimesat */
#ifdef _ALLBSD_SOURCE
capabilities |= sun_nio_fs_UnixNativeDispatcher_SUPPORTS_FUTIMES;
#else
if (my_futimesat_func != NULL)
capabilities |= sun_nio_fs_UnixNativeDispatcher_SUPPORTS_FUTIMES;
#endif
/* supports openat, etc. */
if (my_openat64_func != NULL && my_fstatat64_func != NULL &&
my_unlinkat_func != NULL && my_renameat_func != NULL &&
my_futimesat_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
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* msg;
jsize len;
jbyteArray bytes;
msg = strerror((int)error);
len = strlen(msg);
bytes = (*env)->NewByteArray(env, len);
if (bytes != NULL) {
(*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)msg);
}
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 (fd == -1) {
throwUnixException(env, errno);
}
return (jint)res;
}
JNIEXPORT jlong JNICALL
Java_sun_nio_fs_UnixNativeDispatcher_fopen0(JNIEnv* env, jclass this,
jlong pathAddress, jlong modeAddress)
{
FILE* fp = NULL;
const char* path = (const char*)jlong_to_ptr(pathAddress);
const char* mode = (const char*)jlong_to_ptr(modeAddress);
do {
fp = fopen(path, mode);
} while (fp == NULL && errno == EINTR);
if (fp == NULL) {
throwUnixException(env, errno);
}
return ptr_to_jlong(fp);
}
JNIEXPORT void JNICALL
Java_sun_nio_fs_UnixNativeDispatcher_fclose(JNIEnv* env, jclass this, jlong stream)
{
int res;
FILE* fp = jlong_to_ptr(stream);
do {
res = fclose(fp);
} while (res == EOF && errno == EINTR);
if (res == EOF) {
throwUnixException(env, errno);
}
}
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(open64(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_openat64_func == NULL) {
JNU_ThrowInternalError(env, "should not reach here");
return -1;
}
RESTARTABLE((*my_openat64_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_close(JNIEnv* env, jclass this, jint fd) {
int err;
/* TDB - need to decide if EIO and other errors should cause exception */
RESTARTABLE(close((int)fd), err);
}
JNIEXPORT jint JNICALL
Java_sun_nio_fs_UnixNativeDispatcher_read(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_write(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;
}
/**
* Copy stat64 members into sun.nio.fs.UnixFileAttributes
*/
static void prepAttributes(JNIEnv* env, struct stat64* 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
(*env)->SetLongField(env, attrs, attrs_st_birthtime_sec, (jlong)buf->st_birthtime);
#endif
#if (_POSIX_C_SOURCE >= 200809L) || defined(__solaris__)
(*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);
#endif
}
JNIEXPORT void JNICALL
Java_sun_nio_fs_UnixNativeDispatcher_stat0(JNIEnv* env, jclass this,
jlong pathAddress, jobject attrs)
{
int err;
struct stat64 buf;
const char* path = (const char*)jlong_to_ptr(pathAddress);
RESTARTABLE(stat64(path, &buf), err);
if (err == -1) {
throwUnixException(env, errno);
} else {
prepAttributes(env, &buf, attrs);
}
}
JNIEXPORT void JNICALL
Java_sun_nio_fs_UnixNativeDispatcher_lstat0(JNIEnv* env, jclass this,
jlong pathAddress, jobject attrs)
{
int err;
struct stat64 buf;
const char* path = (const char*)jlong_to_ptr(pathAddress);
RESTARTABLE(lstat64(path, &buf), err);
if (err == -1) {
throwUnixException(env, errno);
} else {
prepAttributes(env, &buf, attrs);
}
}
JNIEXPORT void JNICALL
Java_sun_nio_fs_UnixNativeDispatcher_fstat(JNIEnv* env, jclass this, jint fd,
jobject attrs)
{
int err;
struct stat64 buf;
RESTARTABLE(fstat64((int)fd, &buf), err);
if (err == -1) {
throwUnixException(env, errno);
} else {
prepAttributes(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 stat64 buf;
const char* path = (const char*)jlong_to_ptr(pathAddress);
if (my_fstatat64_func == NULL) {
JNU_ThrowInternalError(env, "should not reach here");
return;
}
RESTARTABLE((*my_fstatat64_func)((int)dfd, path, &buf, (int)flag), err);
if (err == -1) {
throwUnixException(env, errno);
} else {
prepAttributes(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_fchmod(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_fchown(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_futimes(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, ×[0]), err);
#else
if (my_futimesat_func == NULL) {
JNU_ThrowInternalError(env, "my_ftimesat_func is NULL");
return;
}
RESTARTABLE((*my_futimesat_func)(filedes, NULL, ×[0]), err);
#endif
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) {
int err;
DIR* dirp = jlong_to_ptr(dir);
RESTARTABLE(closedir(dirp), err);
if (errno == -1) {
throwUnixException(env, errno);
}
}
JNIEXPORT jbyteArray JNICALL
Java_sun_nio_fs_UnixNativeDispatcher_readdir(JNIEnv* env, jclass this, jlong value) {
struct dirent64* result;
struct {
struct dirent64 buf;
char name_extra[PATH_MAX + 1 - sizeof result->d_name];
} entry;
struct dirent64* ptr = &entry.buf;
int res;
DIR* dirp = jlong_to_ptr(value);
/* EINTR not listed as a possible error */
/* TDB: reentrant version probably not required here */
res = readdir64_r(dirp, ptr, &result);
if (res != 0) {
throwUnixException(env, res);
return NULL;
} else {
if (result == NULL) {
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)) {
n--;
}
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 void 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);
if (err == -1) {
throwUnixException(env, errno);
}
}
JNIEXPORT void JNICALL
Java_sun_nio_fs_UnixNativeDispatcher_statvfs0(JNIEnv* env, jclass this,
jlong pathAddress, jobject attrs)
{
int err;
struct statvfs64 buf;
const char* path = (const char*)jlong_to_ptr(pathAddress);
RESTARTABLE(statvfs64(path, &buf), err);
if (err == -1) {
throwUnixException(env, errno);
} else {
(*env)->SetLongField(env, attrs, attrs_f_frsize, long_to_jlong(buf.f_frsize));
(*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 jlong JNICALL
Java_sun_nio_fs_UnixNativeDispatcher_pathconf0(JNIEnv* env, jclass this,
jlong pathAddress, jint name)
{
long err;
const char* path = (const char*)jlong_to_ptr(pathAddress);
err = pathconf(path, (int)name);
if (err == -1) {
throwUnixException(env, errno);
}
return (jlong)err;
}
JNIEXPORT jlong JNICALL
Java_sun_nio_fs_UnixNativeDispatcher_fpathconf(JNIEnv* env, jclass this,
jint fd, jint name)
{
long err;
err = fpathconf((int)fd, (int)name);
if (err == -1) {
throwUnixException(env, errno);
}
return (jlong)err;
}
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;
#ifdef __solaris__
RESTARTABLE_RETURN_PTR(getpwuid_r((uid_t)uid, &pwent, pwbuf, (size_t)buflen), p);
#else
RESTARTABLE(getpwuid_r((uid_t)uid, &pwent, pwbuf, (size_t)buflen, &p), res);
#endif
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;
#ifdef __solaris__
RESTARTABLE_RETURN_PTR(getgrgid_r((gid_t)gid, &grent, grbuf, (size_t)buflen), g);
#else
RESTARTABLE(getgrgid_r((gid_t)gid, &grent, grbuf, (size_t)buflen, &g), res);
#endif
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;
#ifdef __solaris__
RESTARTABLE_RETURN_PTR(getpwnam_r(name, &pwent, pwbuf, (size_t)buflen), p);
#else
RESTARTABLE(getpwnam_r(name, &pwent, pwbuf, (size_t)buflen, &p), res);
#endif
if (res != 0 || p == NULL || p->pw_name == NULL || *(p->pw_name) == '\0') {
/* not found or error */
if (errno != 0 && errno != ENOENT && errno != ESRCH)
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;
#ifdef __solaris__
RESTARTABLE_RETURN_PTR(getgrnam_r(name, &grent, grbuf, (size_t)buflen), g);
#else
RESTARTABLE(getgrnam_r(name, &grent, grbuf, (size_t)buflen, &g), res);
#endif
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) {
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;
}
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