--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/jdk.attach/macosx/native/libattach/VirtualMachineImpl.c Tue Aug 26 14:35:33 2014 -0700
@@ -0,0 +1,309 @@
+/*
+ * Copyright (c) 2005, 2014, 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <signal.h>
+#include <dirent.h>
+#include <ctype.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/syslimits.h>
+#include <sys/un.h>
+#include <fcntl.h>
+
+#include "sun_tools_attach_VirtualMachineImpl.h"
+
+#define RESTARTABLE(_cmd, _result) do { \
+ do { \
+ _result = _cmd; \
+ } while((_result == -1) && (errno == EINTR)); \
+} while(0)
+
+/*
+ * Class: sun_tools_attach_VirtualMachineImpl
+ * Method: socket
+ * Signature: ()I
+ */
+JNIEXPORT jint JNICALL Java_sun_tools_attach_VirtualMachineImpl_socket
+ (JNIEnv *env, jclass cls)
+{
+ int fd = socket(PF_UNIX, SOCK_STREAM, 0);
+ if (fd == -1) {
+ JNU_ThrowIOExceptionWithLastError(env, "socket");
+ }
+ return (jint)fd;
+}
+
+/*
+ * Class: sun_tools_attach_VirtualMachineImpl
+ * Method: connect
+ * Signature: (ILjava/lang/String;)I
+ */
+JNIEXPORT void JNICALL Java_sun_tools_attach_VirtualMachineImpl_connect
+ (JNIEnv *env, jclass cls, jint fd, jstring path)
+{
+ jboolean isCopy;
+ const char* p = GetStringPlatformChars(env, path, &isCopy);
+ if (p != NULL) {
+ struct sockaddr_un addr;
+ int err = 0;
+
+ memset(&addr, 0, sizeof(addr));
+ addr.sun_family = AF_UNIX;
+ /* strncpy is safe because addr.sun_path was zero-initialized before. */
+ strncpy(addr.sun_path, p, sizeof(addr.sun_path) - 1);
+
+ if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
+ err = errno;
+ }
+
+ if (isCopy) {
+ JNU_ReleaseStringPlatformChars(env, path, p);
+ }
+
+ /*
+ * If the connect failed then we throw the appropriate exception
+ * here (can't throw it before releasing the string as can't call
+ * JNI with pending exception)
+ */
+ if (err != 0) {
+ if (err == ENOENT) {
+ JNU_ThrowByName(env, "java/io/FileNotFoundException", NULL);
+ } else {
+ char* msg = strdup(strerror(err));
+ JNU_ThrowIOException(env, msg);
+ if (msg != NULL) {
+ free(msg);
+ }
+ }
+ }
+ }
+}
+
+/*
+ * Class: sun_tools_attach_VirtualMachineImpl
+ * Method: sendQuitTo
+ * Signature: (I)V
+ */
+JNIEXPORT void JNICALL Java_sun_tools_attach_VirtualMachineImpl_sendQuitTo
+ (JNIEnv *env, jclass cls, jint pid)
+{
+ if (kill((pid_t)pid, SIGQUIT)) {
+ JNU_ThrowIOExceptionWithLastError(env, "kill");
+ }
+}
+
+/*
+ * Class: sun_tools_attach_VirtualMachineImpl
+ * Method: checkPermissions
+ * Signature: (Ljava/lang/String;)V
+ */
+JNIEXPORT void JNICALL Java_sun_tools_attach_VirtualMachineImpl_checkPermissions
+ (JNIEnv *env, jclass cls, jstring path)
+{
+ jboolean isCopy;
+ const char* p = GetStringPlatformChars(env, path, &isCopy);
+ if (p != NULL) {
+ struct stat sb;
+ uid_t uid, gid;
+ int res;
+
+ /*
+ * Check that the path is owned by the effective uid/gid of this
+ * process. Also check that group/other access is not allowed.
+ */
+ uid = geteuid();
+ gid = getegid();
+
+ res = stat(p, &sb);
+ if (res != 0) {
+ /* save errno */
+ res = errno;
+ }
+
+ /* release p here before we throw an I/O exception */
+ if (isCopy) {
+ JNU_ReleaseStringPlatformChars(env, path, p);
+ }
+
+ if (res == 0) {
+ if ( (sb.st_uid != uid) || (sb.st_gid != gid) ||
+ ((sb.st_mode & (S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)) != 0) ) {
+ JNU_ThrowIOException(env, "well-known file is not secure");
+ }
+ } else {
+ char* msg = strdup(strerror(res));
+ JNU_ThrowIOException(env, msg);
+ if (msg != NULL) {
+ free(msg);
+ }
+ }
+ }
+}
+
+/*
+ * Class: sun_tools_attach_VirtualMachineImpl
+ * Method: close
+ * Signature: (I)V
+ */
+JNIEXPORT void JNICALL Java_sun_tools_attach_VirtualMachineImpl_close
+ (JNIEnv *env, jclass cls, jint fd)
+{
+ int res;
+ RESTARTABLE(close(fd), res);
+}
+
+/*
+ * Class: sun_tools_attach_VirtualMachineImpl
+ * Method: read
+ * Signature: (I[BI)I
+ */
+JNIEXPORT jint JNICALL Java_sun_tools_attach_VirtualMachineImpl_read
+ (JNIEnv *env, jclass cls, jint fd, jbyteArray ba, jint off, jint baLen)
+{
+ unsigned char buf[128];
+ size_t len = sizeof(buf);
+ ssize_t n;
+
+ size_t remaining = (size_t)(baLen - off);
+ if (len > remaining) {
+ len = remaining;
+ }
+
+ RESTARTABLE(read(fd, buf, len), n);
+ if (n == -1) {
+ JNU_ThrowIOExceptionWithLastError(env, "read");
+ } else {
+ if (n == 0) {
+ n = -1; // EOF
+ } else {
+ (*env)->SetByteArrayRegion(env, ba, off, (jint)n, (jbyte *)(buf));
+ }
+ }
+ return n;
+}
+
+/*
+ * Class: sun_tools_attach_VirtualMachineImpl
+ * Method: write
+ * Signature: (I[B)V
+ */
+JNIEXPORT void JNICALL Java_sun_tools_attach_VirtualMachineImpl_write
+ (JNIEnv *env, jclass cls, jint fd, jbyteArray ba, jint off, jint bufLen)
+{
+ size_t remaining = bufLen;
+ do {
+ unsigned char buf[128];
+ size_t len = sizeof(buf);
+ int n;
+
+ if (len > remaining) {
+ len = remaining;
+ }
+ (*env)->GetByteArrayRegion(env, ba, off, len, (jbyte *)buf);
+
+ RESTARTABLE(write(fd, buf, len), n);
+ if (n > 0) {
+ off += n;
+ remaining -= n;
+ } else {
+ JNU_ThrowIOExceptionWithLastError(env, "write");
+ return;
+ }
+
+ } while (remaining > 0);
+}
+
+/*
+ * Class: sun_tools_attach_BSDVirtualMachine
+ * Method: createAttachFile
+ * Signature: (Ljava.lang.String;)V
+ */
+JNIEXPORT void JNICALL Java_sun_tools_attach_VirtualMachineImpl_createAttachFile(JNIEnv *env, jclass cls, jstring path)
+{
+ const char* _path;
+ jboolean isCopy;
+ int fd, rc;
+
+ _path = GetStringPlatformChars(env, path, &isCopy);
+ if (_path == NULL) {
+ JNU_ThrowIOException(env, "Must specify a path");
+ return;
+ }
+
+ RESTARTABLE(open(_path, O_CREAT | O_EXCL, S_IWUSR | S_IRUSR), fd);
+ if (fd == -1) {
+ /* release p here before we throw an I/O exception */
+ if (isCopy) {
+ JNU_ReleaseStringPlatformChars(env, path, _path);
+ }
+ JNU_ThrowIOExceptionWithLastError(env, "open");
+ return;
+ }
+
+ RESTARTABLE(chown(_path, geteuid(), getegid()), rc);
+
+ RESTARTABLE(close(fd), rc);
+
+ /* release p here */
+ if (isCopy) {
+ JNU_ReleaseStringPlatformChars(env, path, _path);
+ }
+}
+
+/*
+ * Class: sun_tools_attach_BSDVirtualMachine
+ * Method: getTempDir
+ * Signature: (V)Ljava.lang.String;
+ */
+JNIEXPORT jstring JNICALL Java_sun_tools_attach_VirtualMachineImpl_getTempDir(JNIEnv *env, jclass cls)
+{
+ // This must be hard coded because it's the system's temporary
+ // directory not the java application's temp directory, ala java.io.tmpdir.
+
+#ifdef __APPLE__
+ // macosx has a secure per-user temporary directory
+ static char *temp_path = NULL;
+ char temp_path_storage[PATH_MAX];
+ if (temp_path == NULL) {
+ int pathSize = confstr(_CS_DARWIN_USER_TEMP_DIR, temp_path_storage, PATH_MAX);
+ if (pathSize == 0 || pathSize > PATH_MAX) {
+ strlcpy(temp_path_storage, "/tmp", sizeof(temp_path_storage));
+ }
+ temp_path = temp_path_storage;
+ }
+ return JNU_NewStringPlatform(env, temp_path);
+#else /* __APPLE__ */
+ return (*env)->NewStringUTF(env, "/tmp");
+#endif /* __APPLE__ */
+}