src/solaris/native/java/util/FileSystemPreferences.c

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   1 /*
   2  * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 /*
  27  * Solaris/Linux platform specific code to support the Prefs API.
  28  */
  29 
  30 #include <unistd.h>
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <fcntl.h>
  34 #include <errno.h>
  35 #include <utime.h>
  36 #include "jni_util.h"
  37 
  38 JNIEXPORT jint JNICALL
  39 Java_java_util_prefs_FileSystemPreferences_chmod(JNIEnv *env,
  40                        jclass thisclass, jstring java_fname, jint permission) {
  41     const char *fname = JNU_GetStringPlatformChars(env, java_fname, JNI_FALSE);
  42     int result;

  43     result =  chmod(fname, permission);
  44     if (result != 0)
  45        result = errno;
  46     JNU_ReleaseStringPlatformChars(env, java_fname, fname);

  47     return (jint) result;
  48 }
  49 
  50 #if defined(_ALLBSD_SOURCE)
  51 typedef struct flock FLOCK;
  52 #else
  53 typedef struct flock64 FLOCK;
  54 #endif
  55 
  56 /**
  57  * Try to open a named lock file.
  58  * The result is a cookie that can be used later to unlock the file.
  59  * On failure the result is zero.
  60  */
  61 JNIEXPORT jintArray JNICALL
  62 Java_java_util_prefs_FileSystemPreferences_lockFile0(JNIEnv *env,
  63     jclass thisclass, jstring java_fname, jint permission, jboolean shared) {
  64     const char *fname = JNU_GetStringPlatformChars(env, java_fname, JNI_FALSE);
  65     int fd, rc;
  66     int result[2];
  67     jintArray javaResult;
  68     int old_umask;
  69     FLOCK fl;
  70 



  71     fl.l_whence = SEEK_SET;
  72     fl.l_len = 0;
  73     fl.l_start = 0;
  74     if (shared == JNI_TRUE) {
  75         fl.l_type = F_RDLCK;
  76     } else {
  77         fl.l_type = F_WRLCK;
  78     }
  79 
  80     if (shared == JNI_TRUE) {
  81         fd = open(fname, O_RDONLY, 0);
  82     } else {
  83         old_umask = umask(0);
  84         fd = open(fname, O_WRONLY|O_CREAT, permission);
  85         result[1] = errno;
  86         umask(old_umask);
  87     }
  88 
  89     if (fd < 0) {
  90         result[0] = 0;
  91     } else {
  92 #if defined(_ALLBSD_SOURCE)
  93         rc = fcntl(fd, F_SETLK, &fl);
  94 #else
  95         rc = fcntl(fd, F_SETLK64, &fl);
  96 #endif
  97         result[1] = errno;
  98         if (rc < 0) {
  99             result[0]= 0;
 100             close(fd);
 101         } else {
 102           result[0] = fd;
 103         }
 104     }
 105     JNU_ReleaseStringPlatformChars(env, java_fname, fname);
 106     javaResult = (*env)->NewIntArray(env,2);

 107     (*env)->SetIntArrayRegion(env, javaResult, 0, 2, result);
 108     return javaResult;
 109 }
 110 
 111 
 112 /**
 113  * Try to unlock a lock file, using a cookie returned by lockFile.
 114  */
 115 JNIEXPORT jint JNICALL
 116 Java_java_util_prefs_FileSystemPreferences_unlockFile0(JNIEnv *env,
 117                                       jclass thisclass, jint fd) {
 118 
 119     int rc;
 120     FLOCK fl;
 121     fl.l_whence = SEEK_SET;
 122     fl.l_len = 0;
 123     fl.l_start = 0;
 124     fl.l_type = F_UNLCK;
 125 
 126 #if defined(_ALLBSD_SOURCE)
   1 /*
   2  * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 /*
  27  * Solaris/Linux platform specific code to support the Prefs API.
  28  */
  29 
  30 #include <unistd.h>
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <fcntl.h>
  34 #include <errno.h>
  35 #include <utime.h>
  36 #include "jni_util.h"
  37 
  38 JNIEXPORT jint JNICALL
  39 Java_java_util_prefs_FileSystemPreferences_chmod(JNIEnv *env,
  40                        jclass thisclass, jstring java_fname, jint permission) {
  41     const char *fname = JNU_GetStringPlatformChars(env, java_fname, JNI_FALSE);
  42     int result = -1;
  43     if (fname) {
  44         result =  chmod(fname, permission);
  45         if (result != 0)
  46             result = errno;
  47         JNU_ReleaseStringPlatformChars(env, java_fname, fname);
  48     }
  49     return (jint) result;
  50 }
  51 
  52 #if defined(_ALLBSD_SOURCE)
  53 typedef struct flock FLOCK;
  54 #else
  55 typedef struct flock64 FLOCK;
  56 #endif
  57 
  58 /**
  59  * Try to open a named lock file.
  60  * The result is a cookie that can be used later to unlock the file.
  61  * On failure the result is zero.
  62  */
  63 JNIEXPORT jintArray JNICALL
  64 Java_java_util_prefs_FileSystemPreferences_lockFile0(JNIEnv *env,
  65     jclass thisclass, jstring java_fname, jint permission, jboolean shared) {
  66     const char *fname = JNU_GetStringPlatformChars(env, java_fname, JNI_FALSE);
  67     int fd, rc;
  68     int result[2];
  69     jintArray javaResult = NULL;
  70     int old_umask;
  71     FLOCK fl;
  72 
  73     if (!fname)
  74         return javaResult;
  75 
  76     fl.l_whence = SEEK_SET;
  77     fl.l_len = 0;
  78     fl.l_start = 0;
  79     if (shared == JNI_TRUE) {
  80         fl.l_type = F_RDLCK;
  81     } else {
  82         fl.l_type = F_WRLCK;
  83     }
  84 
  85     if (shared == JNI_TRUE) {
  86         fd = open(fname, O_RDONLY, 0);
  87     } else {
  88         old_umask = umask(0);
  89         fd = open(fname, O_WRONLY|O_CREAT, permission);
  90         result[1] = errno;
  91         umask(old_umask);
  92     }
  93 
  94     if (fd < 0) {
  95         result[0] = 0;
  96     } else {
  97 #if defined(_ALLBSD_SOURCE)
  98         rc = fcntl(fd, F_SETLK, &fl);
  99 #else
 100         rc = fcntl(fd, F_SETLK64, &fl);
 101 #endif
 102         result[1] = errno;
 103         if (rc < 0) {
 104             result[0]= 0;
 105             close(fd);
 106         } else {
 107           result[0] = fd;
 108         }
 109     }
 110     JNU_ReleaseStringPlatformChars(env, java_fname, fname);
 111     javaResult = (*env)->NewIntArray(env,2);
 112     if (javaResult)
 113         (*env)->SetIntArrayRegion(env, javaResult, 0, 2, result);
 114     return javaResult;
 115 }
 116 
 117 
 118 /**
 119  * Try to unlock a lock file, using a cookie returned by lockFile.
 120  */
 121 JNIEXPORT jint JNICALL
 122 Java_java_util_prefs_FileSystemPreferences_unlockFile0(JNIEnv *env,
 123                                       jclass thisclass, jint fd) {
 124 
 125     int rc;
 126     FLOCK fl;
 127     fl.l_whence = SEEK_SET;
 128     fl.l_len = 0;
 129     fl.l_start = 0;
 130     fl.l_type = F_UNLCK;
 131 
 132 #if defined(_ALLBSD_SOURCE)