jdk/src/solaris/native/java/util/prefs/FileSystemPreferences.c
changeset 22951 5fd21112b2b6
parent 22127 0da91a6ccb5f
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/solaris/native/java/util/prefs/FileSystemPreferences.c	Tue Feb 11 09:59:34 2014 +0000
@@ -0,0 +1,147 @@
+/*
+ * Copyright (c) 2001, 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.
+ */
+
+/*
+ * 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"
+
+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;
+}