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805e021f CE |
1 | /* |
2 | * Copyright (c) 2001-2002 International Business Machines Corp. | |
3 | * All rights reserved. | |
4 | * | |
5 | * This software has been released under the terms of the IBM Public | |
6 | * License. For details, see the LICENSE file in the top-level source | |
7 | * directory or online at http://www.openafs.org/dl/license10.html | |
8 | * | |
9 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
10 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
11 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
12 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR | |
13 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
14 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
15 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
16 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
17 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
18 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
19 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
20 | */ | |
21 | ||
22 | #include <afsconfig.h> | |
23 | #include <afs/param.h> | |
24 | #include <errno.h> | |
25 | ||
26 | #include "Internal.h" | |
27 | #include "org_openafs_jafs_FileOutputStream.h" | |
28 | ||
29 | #include <stdio.h> | |
30 | #include <fcntl.h> | |
31 | /*#include <afs/afs_usrops.h>*/ | |
32 | ||
33 | #ifdef DMALLOC | |
34 | #include "dmalloc.h" | |
35 | #endif | |
36 | ||
37 | /** | |
38 | * Be carefull with the memory management: | |
39 | * | |
40 | * - For every GetStringUTFChars call the corresponding ReleaseStringUTFChars. | |
41 | * - For every Get<type>ArrayElements call the corresponding | |
42 | * Release<type>ArrayElements | |
43 | * - For every malloc call the corresponding free. | |
44 | */ | |
45 | ||
46 | /*-------------------------------------------------------------------------*/ | |
47 | ||
48 | /** | |
49 | * Opens an AFS file, with the specified name, for appending. | |
50 | * | |
51 | * env the Java environment | |
52 | * obj the current Java object | |
53 | * fileNameUTF name of file to be opened | |
54 | * | |
55 | * @returns file descriptor | |
56 | * @exception AFSFileException if an I/O or other file related error occurs. | |
57 | */ | |
58 | JNIEXPORT jint JNICALL Java_org_openafs_jafs_FileOutputStream_openWrite | |
59 | (JNIEnv *env, jobject obj, jstring fileNameUTF) | |
60 | { | |
61 | int err; | |
62 | jint fd = -1; //file descriptor | |
63 | ||
64 | fd = openAFSFile(env, fileNameUTF, O_CREAT | O_TRUNC, 0644, &err); | |
65 | if (fd < 0) { | |
66 | fprintf(stderr, "FileOutputStream::openWrite(): err=%d\n", err); | |
67 | throwAFSFileException(env, err, NULL); | |
68 | } | |
69 | return fd; | |
70 | } | |
71 | ||
72 | /** | |
73 | * Opens an AFS file, with the specified name, for writing. | |
74 | * | |
75 | * env the Java environment | |
76 | * obj the current Java object | |
77 | * fileNameUTF name of file to be opened | |
78 | * | |
79 | * @return file descriptor | |
80 | * @exception AFSFileException if an I/O or other file related error occurs. | |
81 | */ | |
82 | JNIEXPORT jint JNICALL Java_org_openafs_jafs_FileOutputStream_openAppend | |
83 | (JNIEnv *env, jobject obj, jstring fileNameUTF) | |
84 | { | |
85 | int err; | |
86 | jint fd = -1; //file descriptor | |
87 | ||
88 | fd = openAFSFile(env, fileNameUTF, O_CREAT | O_APPEND, 0644, &err); | |
89 | if (fd < 0) { | |
90 | fprintf(stderr, "FileOutputStream::openAppend(): err=%d\n", err); | |
91 | throwAFSFileException(env, err, NULL); | |
92 | } | |
93 | return fd; | |
94 | } | |
95 | ||
96 | /** | |
97 | * Writes 'lenght' bytes from the specified byte array starting at offset | |
98 | * 'offset' to this file output stream. | |
99 | * | |
100 | * env the Java environment | |
101 | * obj the current Java object | |
102 | * jbytes the data to be written | |
103 | * offset the start offset in the data | |
104 | * length the number of bytes that are written | |
105 | * | |
106 | * @exception AFSFileException if an I/O or other file related error occurs. | |
107 | */ | |
108 | JNIEXPORT void JNICALL Java_org_openafs_jafs_FileOutputStream_write | |
109 | (JNIEnv *env, jobject obj, jbyteArray jbytes, jint offset, jint length) | |
110 | { | |
111 | int fd, written, toWrite; | |
112 | jint twritten; | |
113 | jclass thisClass; | |
114 | jmethodID getFileDescriptorID; | |
115 | char *bytes; | |
116 | jfieldID fid; | |
117 | ||
118 | thisClass = (*env)->GetObjectClass(env, obj); | |
119 | fid = (*env)->GetFieldID(env, thisClass, "fileDescriptor", "I"); | |
120 | fd = (*env)->GetIntField(env, obj, fid); | |
121 | if(fd < 0) { | |
122 | fprintf(stderr, "FileOutputStream::write(): failed to get file " | |
123 | "descriptor\n"); | |
124 | throwAFSFileException(env, 0, "Failed to get file descriptor!"); | |
125 | } | |
126 | bytes = malloc(length); | |
127 | if(bytes == NULL) { | |
128 | fprintf(stderr, "FileOutputStream::write(): malloc failed of %d bytes\n", | |
129 | length); | |
130 | throwAFSFileException(env, 0, "Failed to allocate memory!"); | |
131 | } | |
132 | (*env) -> GetByteArrayRegion(env, jbytes, offset, length, bytes); | |
133 | toWrite = length; | |
134 | twritten = 0; | |
135 | while(toWrite>0) { | |
136 | written = uafs_write(fd, bytes, length); | |
137 | twritten += written; | |
138 | if(written<0) { | |
139 | free(bytes); | |
140 | throwAFSFileException(env, errno, NULL); | |
141 | } | |
142 | toWrite -= written; | |
143 | } | |
144 | free(bytes); | |
145 | } | |
146 | ||
147 | /** | |
148 | * Closes this file output stream and releases any system resources | |
149 | * associated with this stream. This file output stream may no longer | |
150 | * be used for writing bytes. | |
151 | * | |
152 | * env the Java environment | |
153 | * obj the current Java object | |
154 | * | |
155 | * @exception AFSFileException if an I/O or other file related error occurs. | |
156 | */ | |
157 | JNIEXPORT void JNICALL Java_org_openafs_jafs_FileOutputStream_close | |
158 | (JNIEnv *env, jobject obj) | |
159 | { | |
160 | int fd, rc; | |
161 | jclass thisClass; | |
162 | jmethodID getFileDescriptorID; | |
163 | char *bytes; | |
164 | jfieldID fid; | |
165 | ||
166 | thisClass = (*env)->GetObjectClass(env, obj); | |
167 | fid = (*env)->GetFieldID(env, thisClass, "fileDescriptor", "I"); | |
168 | fd = (*env)->GetIntField(env, obj, fid); | |
169 | if(fd < 0) { | |
170 | fprintf(stderr, "FileOutputStream::close(): failed to get file descriptor\n"); | |
171 | throwAFSFileException(env, 0, "Failed to get file descriptor!"); | |
172 | } | |
173 | rc = uafs_close(fd); | |
174 | if (rc != 0) { | |
175 | throwAFSFileException(env, rc, NULL); | |
176 | } | |
177 | } | |
178 | ||
179 |