mirror of
https://github.com/Fennix-Project/Kernel.git
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138 lines
3.1 KiB
C++
138 lines
3.1 KiB
C++
/*
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This file is part of Fennix Kernel.
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Fennix Kernel is free software: you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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Fennix Kernel is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef __FENNIX_KERNEL_FILESYSTEM_USTAR_H__
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#define __FENNIX_KERNEL_FILESYSTEM_USTAR_H__
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#include <filesystem.hpp>
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namespace vfs
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{
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class USTAR
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{
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public:
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enum TypeFlag
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{
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AREGTYPE = '\0',
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REGTYPE = '0',
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LNKTYPE = '1',
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SYMTYPE = '2',
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CHRTYPE = '3',
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BLKTYPE = '4',
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DIRTYPE = '5',
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FIFOTYPE = '6',
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CONTTYPE = '7'
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};
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enum ModeFlag
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{
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TSUID = 04000,
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TSGID = 02000,
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TSVTX = 01000,
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TUREAD = 00400,
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TUWRITE = 00200,
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TUEXEC = 00100,
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TGREAD = 00040,
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TGWRITE = 00020,
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TGEXEC = 00010,
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TOREAD = 00004,
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TOWRITE = 00002,
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TOEXEC = 00001,
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};
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struct FileHeader
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{
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char name[100];
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char mode[8];
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char uid[8];
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char gid[8];
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char size[12];
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char mtime[12];
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char chksum[8];
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char typeflag[1];
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char link[100];
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char signature[6];
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char version[2];
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char owner[32];
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char group[32];
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char dev_maj[8];
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char dev_min[8];
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char prefix[155];
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char pad[12];
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};
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constexpr static int INODE_CHECKSUM = 0x7757A4;
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struct USTARInode
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{
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struct Inode Node;
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FileHeader *Header;
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USTARInode *Parent;
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std::string Name;
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std::string Path;
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std::vector<USTARInode *> Children;
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bool Deleted;
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int Checksum;
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};
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private:
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std::unordered_map<ino_t, USTARInode *> Files;
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inline uint32_t GetSize(const char *String)
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{
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uint32_t ret = 0;
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while (*String)
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{
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ret *= 8;
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ret += *String - '0';
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String++;
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}
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return ret;
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}
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inline int StringToInt(const char *String)
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{
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int ret = 0;
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for (int i = 0; String[i] != '\0'; ++i)
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ret = ret * 10 + String[i] - '0';
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return ret;
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}
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public:
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dev_t DeviceID = -1;
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ino_t NextInode = 0;
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int Lookup(struct Inode *Parent, const char *Name, struct Inode **Result);
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int Create(struct Inode *Parent, const char *Name, mode_t Mode, struct Inode **Result);
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ssize_t Read(struct Inode *Node, void *Buffer, size_t Size, off_t Offset);
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ssize_t ReadDir(struct Inode *Node, struct kdirent *Buffer, size_t Size, off_t Offset, off_t Entries);
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int SymLink(struct Inode *Node, const char *Name, const char *Target, struct Inode **Result);
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ssize_t ReadLink(struct Inode *Node, char *Buffer, size_t Size);
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int Stat(struct Inode *Node, struct kstat *Stat);
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bool TestArchive(uintptr_t Address);
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void ReadArchive(uintptr_t Address, size_t Size);
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USTAR(){};
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~USTAR(){};
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};
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}
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bool TestAndInitializeUSTAR(uintptr_t Address, size_t Size);
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#endif // !__FENNIX_KERNEL_FILESYSTEM_USTAR_H__
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