| /* |
| * Copyright (c) 2008, 2009, 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 <stdlib.h> |
| #include <dlfcn.h> |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| #include <sys/poll.h> |
| |
| #include "sun_nio_fs_LinuxWatchService.h" |
| |
| /* inotify.h may not be available at build time */ |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| struct inotify_event |
| { |
| int wd; |
| uint32_t mask; |
| uint32_t cookie; |
| uint32_t len; |
| char name __flexarr; |
| }; |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| typedef int inotify_init_func(void); |
| typedef int inotify_add_watch_func(int fd, const char* path, uint32_t mask); |
| typedef int inotify_rm_watch_func(int fd, uint32_t wd); |
| |
| inotify_init_func* my_inotify_init_func = NULL; |
| inotify_add_watch_func* my_inotify_add_watch_func = NULL; |
| inotify_rm_watch_func* my_inotify_rm_watch_func = NULL; |
| |
| 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_LinuxWatchService_init(JNIEnv *env, jclass clazz) |
| { |
| my_inotify_init_func = (inotify_init_func*) |
| dlsym(RTLD_DEFAULT, "inotify_init"); |
| my_inotify_add_watch_func = |
| (inotify_add_watch_func*) dlsym(RTLD_DEFAULT, "inotify_add_watch"); |
| my_inotify_rm_watch_func = |
| (inotify_rm_watch_func*) dlsym(RTLD_DEFAULT, "inotify_rm_watch"); |
| |
| if ((my_inotify_init_func == NULL) || (my_inotify_add_watch_func == NULL) || |
| (my_inotify_rm_watch_func == NULL)) { |
| JNU_ThrowInternalError(env, "unable to get address of inotify functions"); |
| } |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_fs_LinuxWatchService_eventSize(JNIEnv *env, jclass clazz) |
| { |
| return (jint)sizeof(struct inotify_event); |
| } |
| |
| JNIEXPORT jintArray JNICALL |
| Java_sun_nio_fs_LinuxWatchService_eventOffsets(JNIEnv *env, jclass clazz) |
| { |
| jintArray result = (*env)->NewIntArray(env, 5); |
| if (result != NULL) { |
| jint arr[5]; |
| arr[0] = (jint)offsetof(struct inotify_event, wd); |
| arr[1] = (jint)offsetof(struct inotify_event, mask); |
| arr[2] = (jint)offsetof(struct inotify_event, cookie); |
| arr[3] = (jint)offsetof(struct inotify_event, len); |
| arr[4] = (jint)offsetof(struct inotify_event, name); |
| (*env)->SetIntArrayRegion(env, result, 0, 5, arr); |
| } |
| return result; |
| } |
| |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_fs_LinuxWatchService_inotifyInit |
| (JNIEnv* env, jclass clazz) |
| { |
| int ifd = (*my_inotify_init_func)(); |
| if (ifd == -1) { |
| throwUnixException(env, errno); |
| } |
| return (jint)ifd; |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_fs_LinuxWatchService_inotifyAddWatch |
| (JNIEnv* env, jclass clazz, jint fd, jlong address, jint mask) |
| { |
| int wfd = -1; |
| const char* path = (const char*)jlong_to_ptr(address); |
| |
| wfd = (*my_inotify_add_watch_func)((int)fd, path, mask); |
| if (wfd == -1) { |
| throwUnixException(env, errno); |
| } |
| return (jint)wfd; |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_fs_LinuxWatchService_inotifyRmWatch |
| (JNIEnv* env, jclass clazz, jint fd, jint wd) |
| { |
| int err = (*my_inotify_rm_watch_func)((int)fd, (int)wd); |
| if (err == -1) |
| throwUnixException(env, errno); |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_fs_LinuxWatchService_configureBlocking |
| (JNIEnv* env, jclass clazz, jint fd, jboolean blocking) |
| { |
| int flags = fcntl(fd, F_GETFL); |
| |
| if ((blocking == JNI_FALSE) && !(flags & O_NONBLOCK)) |
| fcntl(fd, F_SETFL, flags | O_NONBLOCK); |
| else if ((blocking == JNI_TRUE) && (flags & O_NONBLOCK)) |
| fcntl(fd, F_SETFL, flags & ~O_NONBLOCK); |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_fs_LinuxWatchService_socketpair |
| (JNIEnv* env, jclass clazz, jintArray sv) |
| { |
| int sp[2]; |
| if (socketpair(PF_UNIX, SOCK_STREAM, 0, sp) == -1) { |
| throwUnixException(env, errno); |
| } else { |
| jint res[2]; |
| res[0] = (jint)sp[0]; |
| res[1] = (jint)sp[1]; |
| (*env)->SetIntArrayRegion(env, sv, 0, 2, &res[0]); |
| } |
| |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_fs_LinuxWatchService_poll |
| (JNIEnv* env, jclass clazz, jint fd1, jint fd2) |
| { |
| struct pollfd ufds[2]; |
| int n; |
| |
| ufds[0].fd = fd1; |
| ufds[0].events = POLLIN; |
| ufds[1].fd = fd2; |
| ufds[1].events = POLLIN; |
| |
| n = poll(&ufds[0], 2, -1); |
| if (n == -1) { |
| if (errno == EINTR) { |
| n = 0; |
| } else { |
| throwUnixException(env, errno); |
| } |
| } |
| return (jint)n; |
| |
| |
| } |