/*
* Copyright (c) 1998, 2010, 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 <assert.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
#include <string.h>
#include <stdlib.h>
#include <dlfcn.h>
#include <limits.h>
#include "jni.h"
#include "jni_util.h"
#include "jlong.h"
#include "jvm.h"
#include "io_util.h"
#include "io_util_md.h"
#include "java_io_FileSystem.h"
#include "java_io_UnixFileSystem.h"
#include "JNIHelp.h"
#if defined(_ALLBSD_SOURCE)
#define dirent64 dirent
#define readdir64_r readdir_r
#define stat64 stat
#define statvfs64 statvfs
#endif
/* -- Field IDs -- */
static struct {
jfieldID path;
} ids;
#define NATIVE_METHOD(className, functionName, signature) \
{ #functionName, signature, (void*)(Java_java_io_ ## className ## _ ## functionName) }
JNIEXPORT void JNICALL
Java_java_io_UnixFileSystem_initIDs(JNIEnv *env, jclass cls)
{
jclass fileClass = (*env)->FindClass(env, "java/io/File");
if (!fileClass) return;
ids.path = (*env)->GetFieldID(env, fileClass,
"path", "Ljava/lang/String;");
}
/* -- Path operations -- */
extern int canonicalize(char *path, const char *out, int len);
JNIEXPORT jstring JNICALL
Java_java_io_UnixFileSystem_canonicalize0(JNIEnv *env, jobject this,
jstring pathname)
{
jstring rv = NULL;
WITH_PLATFORM_STRING(env, pathname, path) {
char canonicalPath[JVM_MAXPATHLEN];
if (canonicalize(JVM_NativePath((char *)path),
canonicalPath, JVM_MAXPATHLEN) < 0) {
JNU_ThrowIOExceptionWithLastError(env, "Bad pathname");
} else {
#ifdef MACOSX
rv = newStringPlatform(env, canonicalPath);
#else
rv = JNU_NewStringPlatform(env, canonicalPath);
#endif
}
} END_PLATFORM_STRING(env, path);
return rv;
}
/* -- Attribute accessors -- */
static jboolean
statMode(const char *path, int *mode)
{
struct stat64 sb;
if (stat64(path, &sb) == 0) {
*mode = sb.st_mode;
return JNI_TRUE;
}
return JNI_FALSE;
}
JNIEXPORT jint JNICALL
Java_java_io_UnixFileSystem_getBooleanAttributes0(JNIEnv *env, jobject this,
jstring abspath)
{
jint rv = 0;
/* ----- BEGIN android -----
WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) {*/
WITH_PLATFORM_STRING(env, abspath, path) {
// ----- END android -----
int mode;
if (statMode(path, &mode)) {
int fmt = mode & S_IFMT;
rv = (jint) (java_io_FileSystem_BA_EXISTS
| ((fmt == S_IFREG) ? java_io_FileSystem_BA_REGULAR : 0)
| ((fmt == S_IFDIR) ? java_io_FileSystem_BA_DIRECTORY : 0));
}
} END_PLATFORM_STRING(env, path);
return rv;
}
JNIEXPORT jboolean JNICALL
Java_java_io_UnixFileSystem_checkAccess0(JNIEnv *env, jobject this,
jobject file, jint a)
{
jboolean rv = JNI_FALSE;
int mode = 0;
switch (a) {
case java_io_FileSystem_ACCESS_OK:
mode = F_OK;
break;
case java_io_FileSystem_ACCESS_READ:
mode = R_OK;
break;
case java_io_FileSystem_ACCESS_WRITE:
mode = W_OK;
break;
case java_io_FileSystem_ACCESS_EXECUTE:
mode = X_OK;
break;
default: assert(0);
}
WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) {
if (access(path, mode) == 0) {
rv = JNI_TRUE;
}
} END_PLATFORM_STRING(env, path);
return rv;
}
JNIEXPORT jboolean JNICALL
Java_java_io_UnixFileSystem_setPermission0(JNIEnv *env, jobject this,
jobject file,
jint access,
jboolean enable,
jboolean owneronly)
{
jboolean rv = JNI_FALSE;
WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) {
int amode = 0;
int mode;
switch (access) {
case java_io_FileSystem_ACCESS_READ:
if (owneronly)
amode = S_IRUSR;
else
amode = S_IRUSR | S_IRGRP | S_IROTH;
break;
case java_io_FileSystem_ACCESS_WRITE:
if (owneronly)
amode = S_IWUSR;
else
amode = S_IWUSR | S_IWGRP | S_IWOTH;
break;
case java_io_FileSystem_ACCESS_EXECUTE:
if (owneronly)
amode = S_IXUSR;
else
amode = S_IXUSR | S_IXGRP | S_IXOTH;
break;
default:
assert(0);
}
if (statMode(path, &mode)) {
if (enable)
mode |= amode;
else
mode &= ~amode;
if (chmod(path, mode) >= 0) {
rv = JNI_TRUE;
}
}
} END_PLATFORM_STRING(env, path);
return rv;
}
JNIEXPORT jlong JNICALL
Java_java_io_UnixFileSystem_getLastModifiedTime0(JNIEnv *env, jobject this,
jobject file)
{
jlong rv = 0;
WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) {
struct stat64 sb;
if (stat64(path, &sb) == 0) {
rv = 1000 * (jlong)sb.st_mtime;
}
} END_PLATFORM_STRING(env, path);
return rv;
}
JNIEXPORT jlong JNICALL
Java_java_io_UnixFileSystem_getLength0(JNIEnv *env, jobject this,
jobject file)
{
jlong rv = 0;
WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) {
struct stat64 sb;
if (stat64(path, &sb) == 0) {
rv = sb.st_size;
}
} END_PLATFORM_STRING(env, path);
return rv;
}
/* -- File operations -- */
JNIEXPORT jboolean JNICALL
Java_java_io_UnixFileSystem_createFileExclusively0(JNIEnv *env, jclass cls,
jstring pathname)
{
jboolean rv = JNI_FALSE;
WITH_PLATFORM_STRING(env, pathname, path) {
int fd;
if (!strcmp (path, "/")) {
fd = JVM_EEXIST; /* The root directory always exists */
} else {
fd = JVM_Open(path, JVM_O_RDWR | JVM_O_CREAT | JVM_O_EXCL, 0666);
}
if (fd < 0) {
if (fd != JVM_EEXIST) {
JNU_ThrowIOExceptionWithLastError(env, path);
}
} else {
JVM_Close(fd);
rv = JNI_TRUE;
}
} END_PLATFORM_STRING(env, path);
return rv;
}
JNIEXPORT jboolean JNICALL
Java_java_io_UnixFileSystem_delete0(JNIEnv *env, jobject this,
jobject file)
{
jboolean rv = JNI_FALSE;
WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) {
if (remove(path) == 0) {
rv = JNI_TRUE;
}
} END_PLATFORM_STRING(env, path);
return rv;
}
JNIEXPORT jobjectArray JNICALL
Java_java_io_UnixFileSystem_list0(JNIEnv *env, jobject this,
jobject file)
{
DIR *dir = NULL;
struct dirent64 *ptr;
struct dirent64 *result;
int len, maxlen;
jobjectArray rv, old;
WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) {
dir = opendir(path);
} END_PLATFORM_STRING(env, path);
if (dir == NULL) return NULL;
ptr = malloc(sizeof(struct dirent64) + (PATH_MAX + 1));
if (ptr == NULL) {
JNU_ThrowOutOfMemoryError(env, "heap allocation failed");
closedir(dir);
return NULL;
}
/* Allocate an initial String array */
len = 0;
maxlen = 16;
rv = (*env)->NewObjectArray(env, maxlen, JNU_ClassString(env), NULL);
if (rv == NULL) goto error;
/* Scan the directory */
while ((readdir64_r(dir, ptr, &result) == 0) && (result != NULL)) {
jstring name;
if (!strcmp(ptr->d_name, ".") || !strcmp(ptr->d_name, ".."))
continue;
if (len == maxlen) {
old = rv;
rv = (*env)->NewObjectArray(env, maxlen <<= 1,
JNU_ClassString(env), NULL);
if (rv == NULL) goto error;
if (JNU_CopyObjectArray(env, rv, old, len) < 0) goto error;
(*env)->DeleteLocalRef(env, old);
}
#ifdef MACOSX
name = newStringPlatform(env, ptr->d_name);
#else
name = JNU_NewStringPlatform(env, ptr->d_name);
#endif
if (name == NULL) goto error;
(*env)->SetObjectArrayElement(env, rv, len++, name);
(*env)->DeleteLocalRef(env, name);
}
closedir(dir);
free(ptr);
/* Copy the final results into an appropriately-sized array */
old = rv;
rv = (*env)->NewObjectArray(env, len, JNU_ClassString(env), NULL);
if (rv == NULL) {
return NULL;
}
if (JNU_CopyObjectArray(env, rv, old, len) < 0) {
return NULL;
}
return rv;
error:
closedir(dir);
free(ptr);
return NULL;
}
JNIEXPORT jboolean JNICALL
Java_java_io_UnixFileSystem_createDirectory0(JNIEnv *env, jobject this,
jobject file)
{
jboolean rv = JNI_FALSE;
WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) {
if (mkdir(path, 0777) == 0) {
rv = JNI_TRUE;
}
} END_PLATFORM_STRING(env, path);
return rv;
}
JNIEXPORT jboolean JNICALL
Java_java_io_UnixFileSystem_rename0(JNIEnv *env, jobject this,
jobject from, jobject to)
{
jboolean rv = JNI_FALSE;
WITH_FIELD_PLATFORM_STRING(env, from, ids.path, fromPath) {
WITH_FIELD_PLATFORM_STRING(env, to, ids.path, toPath) {
if (rename(fromPath, toPath) == 0) {
rv = JNI_TRUE;
}
} END_PLATFORM_STRING(env, toPath);
} END_PLATFORM_STRING(env, fromPath);
return rv;
}
JNIEXPORT jboolean JNICALL
Java_java_io_UnixFileSystem_setLastModifiedTime0(JNIEnv *env, jobject this,
jobject file, jlong time)
{
jboolean rv = JNI_FALSE;
WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) {
struct stat64 sb;
if (stat64(path, &sb) == 0) {
struct timeval tv[2];
/* Preserve access time */
tv[0].tv_sec = sb.st_atime;
tv[0].tv_usec = 0;
/* Change last-modified time */
tv[1].tv_sec = time / 1000;
tv[1].tv_usec = (time % 1000) * 1000;
if (utimes(path, tv) == 0)
rv = JNI_TRUE;
}
} END_PLATFORM_STRING(env, path);
return rv;
}
JNIEXPORT jboolean JNICALL
Java_java_io_UnixFileSystem_setReadOnly0(JNIEnv *env, jobject this,
jobject file)
{
jboolean rv = JNI_FALSE;
WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) {
int mode;
if (statMode(path, &mode)) {
if (chmod(path, mode & ~(S_IWUSR | S_IWGRP | S_IWOTH)) >= 0) {
rv = JNI_TRUE;
}
}
} END_PLATFORM_STRING(env, path);
return rv;
}
JNIEXPORT jlong JNICALL
Java_java_io_UnixFileSystem_getSpace0(JNIEnv *env, jobject this,
jobject file, jint t)
{
jlong rv = 0L;
WITH_FIELD_PLATFORM_STRING(env, file, ids.path, path) {
struct statvfs64 fsstat;
memset(&fsstat, 0, sizeof(fsstat));
if (statvfs64(path, &fsstat) == 0) {
switch(t) {
case java_io_FileSystem_SPACE_TOTAL:
rv = jlong_mul(long_to_jlong(fsstat.f_frsize),
long_to_jlong(fsstat.f_blocks));
break;
case java_io_FileSystem_SPACE_FREE:
rv = jlong_mul(long_to_jlong(fsstat.f_frsize),
long_to_jlong(fsstat.f_bfree));
break;
case java_io_FileSystem_SPACE_USABLE:
rv = jlong_mul(long_to_jlong(fsstat.f_frsize),
long_to_jlong(fsstat.f_bavail));
break;
default:
assert(0);
}
}
} END_PLATFORM_STRING(env, path);
return rv;
}
static JNINativeMethod gMethods[] = {
NATIVE_METHOD(UnixFileSystem, initIDs, "()V"),
NATIVE_METHOD(UnixFileSystem, canonicalize0, "(Ljava/lang/String;)Ljava/lang/String;"),
NATIVE_METHOD(UnixFileSystem, getBooleanAttributes0, "(Ljava/lang/String;)I"),
NATIVE_METHOD(UnixFileSystem, checkAccess0, "(Ljava/io/File;I)Z"),
NATIVE_METHOD(UnixFileSystem, setPermission0, "(Ljava/io/File;IZZ)Z"),
NATIVE_METHOD(UnixFileSystem, getLastModifiedTime0, "(Ljava/io/File;)J"),
NATIVE_METHOD(UnixFileSystem, getLength0, "(Ljava/io/File;)J"),
NATIVE_METHOD(UnixFileSystem, createFileExclusively0, "(Ljava/lang/String;)Z"),
NATIVE_METHOD(UnixFileSystem, delete0, "(Ljava/io/File;)Z"),
NATIVE_METHOD(UnixFileSystem, list0, "(Ljava/io/File;)[Ljava/lang/String;"),
NATIVE_METHOD(UnixFileSystem, createDirectory0, "(Ljava/io/File;)Z"),
NATIVE_METHOD(UnixFileSystem, rename0, "(Ljava/io/File;Ljava/io/File;)Z"),
NATIVE_METHOD(UnixFileSystem, setLastModifiedTime0, "(Ljava/io/File;J)Z"),
NATIVE_METHOD(UnixFileSystem, setReadOnly0, "(Ljava/io/File;)Z"),
NATIVE_METHOD(UnixFileSystem, getSpace0, "(Ljava/io/File;I)J"),
};
void register_java_io_UnixFileSystem(JNIEnv* env) {
jniRegisterNativeMethods(env, "java/io/UnixFileSystem", gMethods, NELEM(gMethods));
}