1 /*
2  * Copyright (C) 2018 Matthieu Gautier <mgautier@kymeria.fr>
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public License as
6  * published by the Free Software Foundation; either version 2 of the
7  * License, or (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful, but
10  * is provided AS IS, WITHOUT ANY WARRANTY; without even the implied
11  * warranty of MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, and
12  * NON-INFRINGEMENT.  See the GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
17  *
18  */
19 
20 #ifndef ZIM_FS_UNIX_H_
21 #define ZIM_FS_UNIX_H_
22 
23 #include "zim_types.h"
24 
25 #include <stdexcept>
26 
27 #include <sys/types.h>
28 #include <sys/stat.h>
29 #include <fcntl.h>
30 #include <unistd.h>
31 #include <dirent.h>
32 
33 namespace zim {
34 
35 namespace unix {
36 
37 using path_t = const std::string&;
38 
39 class FD {
40   public:
41     using fd_t = int;
42 
43   private:
44     fd_t m_fd = -1;
45 
46   public:
47     FD() = default;
FD(fd_t fd)48     FD(fd_t fd):
49       m_fd(fd) {};
50     FD(const FD& o) = delete;
FD(FD && o)51     FD(FD&& o) :
52       m_fd(o.m_fd) { o.m_fd = -1; }
53     FD& operator=(FD&& o) {
54       m_fd = o.m_fd;
55       o.m_fd = -1;
56       return *this;
57     }
~FD()58     ~FD() { close(); }
59     zsize_t readAt(char* dest, zsize_t size, offset_t offset) const;
60     zsize_t getSize() const;
getNativeHandle()61     fd_t    getNativeHandle() const
62     {
63         return m_fd;
64     }
release()65     fd_t    release()
66     {
67         int ret = m_fd;
68         m_fd = -1;
69         return ret;
70     }
71     bool    seek(offset_t offset);
72     bool    close();
73 };
74 
75 struct FS {
76     using FD = zim::unix::FD;
77     static std::string join(path_t base, path_t name);
78     static FD    openFile(path_t filepath);
79     static bool  makeDirectory(path_t path);
80     static void  rename(path_t old_path, path_t new_path);
81     static bool  remove(path_t path);
82     static bool  removeDir(path_t path);
83     static bool  removeFile(path_t path);
84 };
85 
86 }; // unix namespace
87 
88 }; // zim namespace
89 
90 #endif //ZIM_FS_UNIX_H_
91