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/*
* Copyright (c) 2008, 2012, 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 "jni.h"
#include "jni_util.h"
#include "jvm.h"
#include "jlong.h"
#include <stdio.h>
#include <string.h>
#include <dlfcn.h>
#include <errno.h>
#include <mntent.h>
#include "sun_nio_fs_LinuxNativeDispatcher.h"
typedef size_t fgetxattr_func(int fd, const char* name, void* value, size_t size);
typedef int fsetxattr_func(int fd, const char* name, void* value, size_t size, int flags);
typedef int fremovexattr_func(int fd, const char* name);
typedef int flistxattr_func(int fd, char* list, size_t size);
fgetxattr_func* my_fgetxattr_func = NULL;
fsetxattr_func* my_fsetxattr_func = NULL;
fremovexattr_func* my_fremovexattr_func = NULL;
flistxattr_func* my_flistxattr_func = NULL;
static jfieldID entry_name;
static jfieldID entry_dir;
static jfieldID entry_fstype;
static jfieldID entry_options;
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);
}
}
JNIEXPORT void JNICALL
Java_sun_nio_fs_LinuxNativeDispatcher_init(JNIEnv *env, jclass clazz)
{
my_fgetxattr_func = (fgetxattr_func*)dlsym(RTLD_DEFAULT, "fgetxattr");
my_fsetxattr_func = (fsetxattr_func*)dlsym(RTLD_DEFAULT, "fsetxattr");
my_fremovexattr_func = (fremovexattr_func*)dlsym(RTLD_DEFAULT, "fremovexattr");
my_flistxattr_func = (flistxattr_func*)dlsym(RTLD_DEFAULT, "flistxattr");
clazz = (*env)->FindClass(env, "sun/nio/fs/UnixMountEntry");
CHECK_NULL(clazz);
entry_name = (*env)->GetFieldID(env, clazz, "name", "[B");
CHECK_NULL(entry_name);
entry_dir = (*env)->GetFieldID(env, clazz, "dir", "[B");
CHECK_NULL(entry_dir);
entry_fstype = (*env)->GetFieldID(env, clazz, "fstype", "[B");
CHECK_NULL(entry_fstype);
entry_options = (*env)->GetFieldID(env, clazz, "opts", "[B");
CHECK_NULL(entry_options);
}
JNIEXPORT jint JNICALL
Java_sun_nio_fs_LinuxNativeDispatcher_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);
if (my_fgetxattr_func == NULL) {
errno = ENOTSUP;
} else {
/* EINTR not documented */
res = (*my_fgetxattr_func)(fd, name, value, valueLen);
}
if (res == (size_t)-1)
throwUnixException(env, errno);
return (jint)res;
}
JNIEXPORT void JNICALL
Java_sun_nio_fs_LinuxNativeDispatcher_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);
if (my_fsetxattr_func == NULL) {
errno = ENOTSUP;
} else {
/* EINTR not documented */
res = (*my_fsetxattr_func)(fd, name, value, valueLen, 0);
}
if (res == -1)
throwUnixException(env, errno);
}
JNIEXPORT void JNICALL
Java_sun_nio_fs_LinuxNativeDispatcher_fremovexattr0(JNIEnv* env, jclass clazz,
jint fd, jlong nameAddress)
{
int res = -1;
const char* name = jlong_to_ptr(nameAddress);
if (my_fremovexattr_func == NULL) {
errno = ENOTSUP;
} else {
/* EINTR not documented */
res = (*my_fremovexattr_func)(fd, name);
}
if (res == -1)
throwUnixException(env, errno);
}
JNIEXPORT jint JNICALL
Java_sun_nio_fs_LinuxNativeDispatcher_flistxattr(JNIEnv* env, jclass clazz,
jint fd, jlong listAddress, jint size)
{
size_t res = -1;
char* list = jlong_to_ptr(listAddress);
if (my_flistxattr_func == NULL) {
errno = ENOTSUP;
} else {
/* EINTR not documented */
res = (*my_flistxattr_func)(fd, list, (size_t)size);
}
if (res == (size_t)-1)
throwUnixException(env, errno);
return (jint)res;
}
JNIEXPORT jlong JNICALL
Java_sun_nio_fs_LinuxNativeDispatcher_setmntent0(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 = setmntent(path, mode);
} while (fp == NULL && errno == EINTR);
if (fp == NULL) {
throwUnixException(env, errno);
}
return ptr_to_jlong(fp);
}
JNIEXPORT jint JNICALL
Java_sun_nio_fs_LinuxNativeDispatcher_getmntent(JNIEnv* env, jclass this,
jlong value, jobject entry)
{
struct mntent ent;
char buf[1024];
int buflen = sizeof(buf);
struct mntent* m;
FILE* fp = jlong_to_ptr(value);
jsize len;
jbyteArray bytes;
char* name;
char* dir;
char* fstype;
char* options;
m = getmntent_r(fp, &ent, (char*)&buf, buflen);
if (m == NULL)
return -1;
name = m->mnt_fsname;
dir = m->mnt_dir;
fstype = m->mnt_type;
options = m->mnt_opts;
len = strlen(name);
bytes = (*env)->NewByteArray(env, len);
if (bytes == NULL)
return -1;
(*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)name);
(*env)->SetObjectField(env, entry, entry_name, bytes);
len = strlen(dir);
bytes = (*env)->NewByteArray(env, len);
if (bytes == NULL)
return -1;
(*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)dir);
(*env)->SetObjectField(env, entry, entry_dir, bytes);
len = strlen(fstype);
bytes = (*env)->NewByteArray(env, len);
if (bytes == NULL)
return -1;
(*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)fstype);
(*env)->SetObjectField(env, entry, entry_fstype, bytes);
len = strlen(options);
bytes = (*env)->NewByteArray(env, len);
if (bytes == NULL)
return -1;
(*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)options);
(*env)->SetObjectField(env, entry, entry_options, bytes);
return 0;
}
JNIEXPORT void JNICALL
Java_sun_nio_fs_LinuxNativeDispatcher_endmntent(JNIEnv* env, jclass this, jlong stream)
{
FILE* fp = jlong_to_ptr(stream);
/* FIXME - man page doesn't explain how errors are returned */
endmntent(fp);
}
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