1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
/*
* Copyright 2003-2017 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPD_FS_FILE_INFO_HXX
#define MPD_FS_FILE_INFO_HXX
#include "check.h"
#include "Path.hxx"
#include "system/Error.hxx"
#include <stdint.h>
#ifdef WIN32
#include <fileapi.h>
#else
#include <sys/stat.h>
#endif
#ifdef WIN32
static inline constexpr uint64_t
ConstructUint64(DWORD lo, DWORD hi)
{
return uint64_t(lo) | (uint64_t(hi) << 32);
}
static constexpr time_t
FileTimeToTimeT(FILETIME ft)
{
return (ConstructUint64(ft.dwLowDateTime, ft.dwHighDateTime)
- 116444736000000000) / 10000000;
}
#endif
class FileInfo {
friend bool GetFileInfo(Path path, FileInfo &info,
bool follow_symlinks);
friend class FileReader;
#ifdef WIN32
WIN32_FILE_ATTRIBUTE_DATA data;
#else
struct stat st;
#endif
public:
FileInfo() = default;
FileInfo(Path path, bool follow_symlinks=true) {
if (!GetFileInfo(path, *this, follow_symlinks)) {
#ifdef WIN32
throw FormatLastError("Failed to access %s",
path.ToUTF8().c_str());
#else
throw FormatErrno("Failed to access %s",
path.ToUTF8().c_str());
#endif
}
}
bool IsRegular() const {
#ifdef WIN32
return (data.dwFileAttributes &
(FILE_ATTRIBUTE_DIRECTORY|FILE_ATTRIBUTE_DEVICE)) == 0;
#else
return S_ISREG(st.st_mode);
#endif
}
bool IsDirectory() const {
#ifdef WIN32
return data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
#else
return S_ISDIR(st.st_mode);
#endif
}
uint64_t GetSize() const {
#ifdef WIN32
return ConstructUint64(data.nFileSizeLow, data.nFileSizeHigh);
#else
return st.st_size;
#endif
}
time_t GetModificationTime() const {
#ifdef WIN32
return FileTimeToTimeT(data.ftLastWriteTime);
#else
return st.st_mtime;
#endif
}
#ifndef WIN32
uid_t GetUid() const {
return st.st_uid;
}
mode_t GetMode() const {
return st.st_mode;
}
dev_t GetDevice() const {
return st.st_dev;
}
ino_t GetInode() const {
return st.st_ino;
}
#endif
};
inline bool
GetFileInfo(Path path, FileInfo &info, bool follow_symlinks=true)
{
#ifdef WIN32
(void)follow_symlinks;
return GetFileAttributesEx(path.c_str(), GetFileExInfoStandard,
&info.data);
#else
int ret = follow_symlinks
? stat(path.c_str(), &info.st)
: lstat(path.c_str(), &info.st);
return ret == 0;
#endif
}
#endif
|
