1 /*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "file.h"
18
19 #include <fcntl.h>
20 #include <string.h>
21 #include <unistd.h>
22
23 namespace android {
24
File()25 File::File()
26 : mInitCheck(NO_INIT),
27 mFd(-1) {
28 }
29
File(const char * path,const char * mode)30 File::File(const char *path, const char *mode)
31 : mInitCheck(NO_INIT),
32 mFd(-1) {
33 mInitCheck = setTo(path, mode);
34 }
35
~File()36 File::~File() {
37 close();
38 }
39
initCheck() const40 status_t File::initCheck() const {
41 return mInitCheck;
42 }
43
setTo(const char * path,const char * mode)44 status_t File::setTo(const char *path, const char *mode) {
45 close();
46
47 int modeval = 0;
48 if (!strcmp("r", mode)) {
49 modeval = O_RDONLY;
50 } else if (!strcmp("w", mode)) {
51 modeval = O_WRONLY | O_CREAT | O_TRUNC;
52 } else if (!strcmp("rw", mode)) {
53 modeval = O_RDWR | O_CREAT;
54 }
55
56 int filemode = 0;
57 if (modeval & O_CREAT) {
58 filemode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH;
59 }
60
61 mFd = open(path, modeval, filemode);
62
63 mInitCheck = (mFd >= 0) ? OK : -errno;
64
65 return mInitCheck;
66 }
67
close()68 void File::close() {
69 if (mFd >= 0) {
70 ::close(mFd);
71 mFd = -1;
72 }
73
74 mInitCheck = NO_INIT;
75 }
76
read(void * data,size_t size)77 ssize_t File::read(void *data, size_t size) {
78 return ::read(mFd, data, size);
79 }
80
write(const void * data,size_t size)81 ssize_t File::write(const void *data, size_t size) {
82 return ::write(mFd, data, size);
83 }
84
seekTo(off64_t pos,int whence)85 off64_t File::seekTo(off64_t pos, int whence) {
86 off64_t new_pos = lseek64(mFd, pos, whence);
87 return new_pos < 0 ? -errno : new_pos;
88 }
89
90 } // namespace android
91