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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <LibCore/File.h>
28#include <errno.h>
29#include <fcntl.h>
30#include <stdio.h>
31#include <sys/stat.h>
32#include <unistd.h>
33
34namespace Core {
35
36File::File(const StringView& filename, Object* parent)
37 : IODevice(parent)
38 , m_filename(filename)
39{
40}
41
42File::~File()
43{
44 if (m_should_close_file_descriptor == ShouldCloseFileDescription::Yes && mode() != NotOpen)
45 close();
46}
47
48bool File::open(int fd, IODevice::OpenMode mode, ShouldCloseFileDescription should_close)
49{
50 set_fd(fd);
51 set_mode(mode);
52 m_should_close_file_descriptor = should_close;
53 return true;
54}
55
56bool File::open(IODevice::OpenMode mode)
57{
58 ASSERT(!m_filename.is_null());
59 int flags = 0;
60 if ((mode & IODevice::ReadWrite) == IODevice::ReadWrite) {
61 flags |= O_RDWR | O_CREAT;
62 } else if (mode & IODevice::ReadOnly) {
63 flags |= O_RDONLY;
64 } else if (mode & IODevice::WriteOnly) {
65 flags |= O_WRONLY | O_CREAT;
66 bool should_truncate = !((mode & IODevice::Append) || (mode & IODevice::MustBeNew));
67 if (should_truncate)
68 flags |= O_TRUNC;
69 }
70 if (mode & IODevice::Append)
71 flags |= O_APPEND;
72 if (mode & IODevice::Truncate)
73 flags |= O_TRUNC;
74 if (mode & IODevice::MustBeNew)
75 flags |= O_EXCL;
76 int fd = ::open(m_filename.characters(), flags, 0666);
77 if (fd < 0) {
78 set_error(errno);
79 return false;
80 }
81
82 set_fd(fd);
83 set_mode(mode);
84 return true;
85}
86
87bool File::is_directory() const
88{
89 struct stat stat;
90 if (fstat(fd(), &stat) < 0)
91 return false;
92 return S_ISDIR(stat.st_mode);
93}
94
95bool File::is_directory(const String& filename)
96{
97 struct stat st;
98 if (stat(filename.characters(), &st) < 0)
99 return false;
100 return S_ISDIR(st.st_mode);
101}
102
103bool File::exists(const String& filename)
104{
105 struct stat st;
106 return stat(filename.characters(), &st) == 0;
107}
108
109}