| /* |
| * Copyright (c) 2008, 2015, Oracle and/or its affiliates. All rights reserved. |
| * Copyright 2015 SAP AG. 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/un.h> |
| |
| /* |
| * Based on 'LinuxVirtualMachine.c'. Non-relevant code has been removed and all |
| * occurrences of the string "Linux" have been replaced by "Aix". |
| */ |
| |
| #include "sun_tools_attach_AixVirtualMachine.h" |
| |
| #define RESTARTABLE(_cmd, _result) do { \ |
| do { \ |
| _result = _cmd; \ |
| } while((_result == -1) && (errno == EINTR)); \ |
| } while(0) |
| |
| |
| /* |
| * Class: sun_tools_attach_AixVirtualMachine |
| * Method: socket |
| * Signature: ()I |
| */ |
| JNIEXPORT jint JNICALL Java_sun_tools_attach_AixVirtualMachine_socket |
| (JNIEnv *env, jclass cls) |
| { |
| int fd = socket(PF_UNIX, SOCK_STREAM, 0); |
| if (fd == -1) { |
| JNU_ThrowIOExceptionWithLastError(env, "socket"); |
| } |
| /* added time out values */ |
| else { |
| struct timeval tv; |
| tv.tv_sec = 2 * 60; |
| tv.tv_usec = 0; |
| |
| setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, (char*)&tv, sizeof(tv)); |
| setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, (char*)&tv, sizeof(tv)); |
| } |
| return (jint)fd; |
| } |
| |
| /* |
| * Class: sun_tools_attach_AixVirtualMachine |
| * Method: connect |
| * Signature: (ILjava/lang/String;)I |
| */ |
| JNIEXPORT void JNICALL Java_sun_tools_attach_AixVirtualMachine_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; |
| |
| /* added missing structure initialization */ |
| memset(&addr,0, sizeof(addr)); |
| addr.sun_family = AF_UNIX; |
| strcpy(addr.sun_path, p); |
| /* We must call bind with the actual socketaddr length. This is obligatory for AS400. */ |
| if (connect(fd, (struct sockaddr*)&addr, SUN_LEN(&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); |
| } |
| } |
| } |
| } |
| } |
| |
| |
| /* |
| * Structure and callback function used to send a QUIT signal to all |
| * children of a given process |
| */ |
| typedef struct { |
| pid_t ppid; |
| } SendQuitContext; |
| |
| static void SendQuitCallback(const pid_t pid, void* user_data) { |
| SendQuitContext* context = (SendQuitContext*)user_data; |
| pid_t parent = getParent(pid); |
| if (parent == context->ppid) { |
| kill(pid, SIGQUIT); |
| } |
| } |
| |
| /* |
| * Class: sun_tools_attach_AixVirtualMachine |
| * Method: sendQuitTo |
| * Signature: (I)V |
| */ |
| JNIEXPORT void JNICALL Java_sun_tools_attach_AixVirtualMachine_sendQuitTo |
| (JNIEnv *env, jclass cls, jint pid) |
| { |
| if (kill((pid_t)pid, SIGQUIT)) { |
| JNU_ThrowIOExceptionWithLastError(env, "kill"); |
| } |
| } |
| |
| /* |
| * Class: sun_tools_attach_AixVirtualMachine |
| * Method: checkPermissions |
| * Signature: (Ljava/lang/String;)V |
| */ |
| JNIEXPORT void JNICALL Java_sun_tools_attach_AixVirtualMachine_checkPermissions |
| (JNIEnv *env, jclass cls, jstring path) |
| { |
| jboolean isCopy; |
| const char* p = GetStringPlatformChars(env, path, &isCopy); |
| if (p != NULL) { |
| struct stat64 sb; |
| uid_t uid, gid; |
| int res; |
| /* added missing initialization of the stat64 buffer */ |
| memset(&sb, 0, sizeof(struct stat64)); |
| |
| /* |
| * 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 = stat64(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_AixVirtualMachine |
| * Method: close |
| * Signature: (I)V |
| */ |
| JNIEXPORT void JNICALL Java_sun_tools_attach_AixVirtualMachine_close |
| (JNIEnv *env, jclass cls, jint fd) |
| { |
| int res; |
| /* Fixed deadlock when this call of close by the client is not seen by the attach server |
| * which has accepted the (very short) connection already and is waiting for the request. But read don't get a byte, |
| * because the close is lost without shutdown. |
| */ |
| shutdown(fd, 2); |
| RESTARTABLE(close(fd), res); |
| } |
| |
| /* |
| * Class: sun_tools_attach_AixVirtualMachine |
| * Method: read |
| * Signature: (I[BI)I |
| */ |
| JNIEXPORT jint JNICALL Java_sun_tools_attach_AixVirtualMachine_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_AixVirtualMachine |
| * Method: write |
| * Signature: (I[B)V |
| */ |
| JNIEXPORT void JNICALL Java_sun_tools_attach_AixVirtualMachine_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); |
| } |
