| /* |
| * Copyright (c) 2001, 2015, 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. |
| */ |
| |
| /* |
| * Solaris/Linux platform specific code to support the Prefs API. |
| */ |
| |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <errno.h> |
| #include <utime.h> |
| #include "jni_util.h" |
| |
| /* |
| * Declare library specific JNI_Onload entry if static build |
| */ |
| DEF_STATIC_JNI_OnLoad |
| |
| JNIEXPORT jint JNICALL |
| Java_java_util_prefs_FileSystemPreferences_chmod(JNIEnv *env, |
| jclass thisclass, jstring java_fname, jint permission) { |
| const char *fname = JNU_GetStringPlatformChars(env, java_fname, NULL); |
| int result = -1; |
| if (fname) { |
| result = chmod(fname, permission); |
| if (result != 0) |
| result = errno; |
| JNU_ReleaseStringPlatformChars(env, java_fname, fname); |
| } |
| return (jint) result; |
| } |
| |
| #if defined(_ALLBSD_SOURCE) |
| typedef struct flock FLOCK; |
| #else |
| typedef struct flock64 FLOCK; |
| #endif |
| |
| /** |
| * Try to open a named lock file. |
| * The result is a cookie that can be used later to unlock the file. |
| * On failure the result is zero. |
| */ |
| JNIEXPORT jintArray JNICALL |
| Java_java_util_prefs_FileSystemPreferences_lockFile0(JNIEnv *env, |
| jclass thisclass, jstring java_fname, jint permission, jboolean shared) { |
| const char *fname = JNU_GetStringPlatformChars(env, java_fname, NULL); |
| int fd, rc; |
| int result[2]; |
| jintArray javaResult = NULL; |
| int old_umask; |
| FLOCK fl; |
| |
| if (!fname) |
| return javaResult; |
| |
| fl.l_whence = SEEK_SET; |
| fl.l_len = 0; |
| fl.l_start = 0; |
| if (shared == JNI_TRUE) { |
| fl.l_type = F_RDLCK; |
| } else { |
| fl.l_type = F_WRLCK; |
| } |
| |
| if (shared == JNI_TRUE) { |
| fd = open(fname, O_RDONLY, 0); |
| } else { |
| old_umask = umask(0); |
| fd = open(fname, O_WRONLY|O_CREAT, permission); |
| result[1] = errno; |
| umask(old_umask); |
| } |
| |
| if (fd < 0) { |
| result[0] = 0; |
| } else { |
| #if defined(_ALLBSD_SOURCE) |
| rc = fcntl(fd, F_SETLK, &fl); |
| #else |
| rc = fcntl(fd, F_SETLK64, &fl); |
| #endif |
| result[1] = errno; |
| if (rc < 0) { |
| result[0]= 0; |
| close(fd); |
| } else { |
| result[0] = fd; |
| } |
| } |
| JNU_ReleaseStringPlatformChars(env, java_fname, fname); |
| javaResult = (*env)->NewIntArray(env,2); |
| if (javaResult) |
| (*env)->SetIntArrayRegion(env, javaResult, 0, 2, result); |
| return javaResult; |
| } |
| |
| |
| /** |
| * Try to unlock a lock file, using a cookie returned by lockFile. |
| */ |
| JNIEXPORT jint JNICALL |
| Java_java_util_prefs_FileSystemPreferences_unlockFile0(JNIEnv *env, |
| jclass thisclass, jint fd) { |
| |
| int rc; |
| FLOCK fl; |
| fl.l_whence = SEEK_SET; |
| fl.l_len = 0; |
| fl.l_start = 0; |
| fl.l_type = F_UNLCK; |
| |
| #if defined(_ALLBSD_SOURCE) |
| rc = fcntl(fd, F_SETLK, &fl); |
| #else |
| rc = fcntl(fd, F_SETLK64, &fl); |
| #endif |
| |
| if (rc < 0) { |
| close(fd); |
| return (jint)errno; |
| } |
| rc = close(fd); |
| if (rc < 0) { |
| return (jint) errno; |
| } |
| return 0; |
| } |