1 /*
2 * Copyright 2003-2021 The Music Player Daemon Project
3 * http://www.musicpd.org
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
20 #ifndef MPD_FS_FILE_INFO_HXX
21 #define MPD_FS_FILE_INFO_HXX
22
23 #include "Path.hxx"
24 #include "system/Error.hxx"
25
26 #ifdef _WIN32
27 #include "time/FileTime.hxx"
28 #else
29 #include <sys/stat.h>
30 #endif
31
32 #include <chrono>
33 #include <cstdint>
34
35 class FileInfo {
36 friend bool GetFileInfo(Path path, FileInfo &info,
37 bool follow_symlinks);
38 friend class FileReader;
39
40 #ifdef _WIN32
41 WIN32_FILE_ATTRIBUTE_DATA data;
42 #else
43 struct stat st;
44 #endif
45
46 public:
47 FileInfo() = default;
48
FileInfo(Path path,bool follow_symlinks=true)49 FileInfo(Path path, bool follow_symlinks=true) {
50 if (!GetFileInfo(path, *this, follow_symlinks)) {
51 #ifdef _WIN32
52 throw FormatLastError("Failed to access %s",
53 path.ToUTF8().c_str());
54 #else
55 throw FormatErrno("Failed to access %s",
56 path.ToUTF8().c_str());
57 #endif
58 }
59 }
60
IsRegular() const61 bool IsRegular() const {
62 #ifdef _WIN32
63 return (data.dwFileAttributes &
64 (FILE_ATTRIBUTE_DIRECTORY|FILE_ATTRIBUTE_DEVICE)) == 0;
65 #else
66 return S_ISREG(st.st_mode);
67 #endif
68 }
69
IsDirectory() const70 bool IsDirectory() const {
71 #ifdef _WIN32
72 return data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
73 #else
74 return S_ISDIR(st.st_mode);
75 #endif
76 }
77
GetSize() const78 uint64_t GetSize() const {
79 #ifdef _WIN32
80 return ConstructUint64(data.nFileSizeLow, data.nFileSizeHigh);
81 #else
82 return st.st_size;
83 #endif
84 }
85
GetModificationTime() const86 std::chrono::system_clock::time_point GetModificationTime() const {
87 #ifdef _WIN32
88 return FileTimeToChrono(data.ftLastWriteTime);
89 #else
90 return std::chrono::system_clock::from_time_t(st.st_mtime);
91 #endif
92 }
93
94 #ifndef _WIN32
GetUid() const95 uid_t GetUid() const {
96 return st.st_uid;
97 }
98
GetMode() const99 mode_t GetMode() const {
100 return st.st_mode;
101 }
102
GetDevice() const103 dev_t GetDevice() const {
104 return st.st_dev;
105 }
106
GetInode() const107 ino_t GetInode() const {
108 return st.st_ino;
109 }
110 #endif
111 };
112
113 inline bool
GetFileInfo(Path path,FileInfo & info,bool follow_symlinks=true)114 GetFileInfo(Path path, FileInfo &info, bool follow_symlinks=true)
115 {
116 #ifdef _WIN32
117 (void)follow_symlinks;
118 return GetFileAttributesEx(path.c_str(), GetFileExInfoStandard,
119 &info.data);
120 #else
121 int ret = follow_symlinks
122 ? stat(path.c_str(), &info.st)
123 : lstat(path.c_str(), &info.st);
124 return ret == 0;
125 #endif
126 }
127
128 #endif
129