mirror of
https://github.com/RGBCube/serenity
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27f699ef0c
These types can be picked up by including <AK/Types.h>: * u8, u16, u32, u64 (unsigned) * i8, i16, i32, i64 (signed)
112 lines
3.6 KiB
C++
112 lines
3.6 KiB
C++
#pragma once
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#include <AK/HashTable.h>
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#include <Kernel/FileSystem/InodeIdentifier.h>
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#include <Kernel/KResult.h>
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#include <Kernel/UnixTypes.h>
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class Process;
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inline constexpr u32 encoded_device(unsigned major, unsigned minor)
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{
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return (minor & 0xff) | (major << 8) | ((minor & ~0xff) << 12);
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}
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inline bool is_directory(mode_t mode) { return (mode & 0170000) == 0040000; }
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inline bool is_character_device(mode_t mode) { return (mode & 0170000) == 0020000; }
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inline bool is_block_device(mode_t mode) { return (mode & 0170000) == 0060000; }
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inline bool is_regular_file(mode_t mode) { return (mode & 0170000) == 0100000; }
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inline bool is_fifo(mode_t mode) { return (mode & 0170000) == 0010000; }
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inline bool is_symlink(mode_t mode) { return (mode & 0170000) == 0120000; }
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inline bool is_socket(mode_t mode) { return (mode & 0170000) == 0140000; }
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inline bool is_sticky(mode_t mode) { return mode & 01000; }
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inline bool is_setuid(mode_t mode) { return mode & 04000; }
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inline bool is_setgid(mode_t mode) { return mode & 02000; }
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struct InodeMetadata {
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bool is_valid() const { return inode.is_valid(); }
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bool may_read(Process&) const;
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bool may_write(Process&) const;
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bool may_execute(Process&) const;
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bool may_read(uid_t u, const HashTable<gid_t>& g) const
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{
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if (u == 0)
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return true;
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if (uid == u)
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return mode & 0400;
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if (g.contains(gid))
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return mode & 0040;
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return mode & 0004;
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}
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bool may_write(uid_t u, const HashTable<gid_t>& g) const
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{
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if (u == 0)
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return true;
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if (uid == u)
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return mode & 0200;
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if (g.contains(gid))
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return mode & 0020;
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return mode & 0002;
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}
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bool may_execute(uid_t u, const HashTable<gid_t>& g) const
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{
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if (u == 0)
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return true;
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if (uid == u)
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return mode & 0100;
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if (g.contains(gid))
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return mode & 0010;
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return mode & 0001;
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}
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bool is_directory() const { return ::is_directory(mode); }
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bool is_character_device() const { return ::is_character_device(mode); }
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bool is_block_device() const { return ::is_block_device(mode); }
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bool is_device() const { return is_character_device() || is_block_device(); }
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bool is_regular_file() const { return ::is_regular_file(mode); }
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bool is_fifo() const { return ::is_fifo(mode); }
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bool is_symlink() const { return ::is_symlink(mode); }
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bool is_socket() const { return ::is_socket(mode); }
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bool is_sticky() const { return ::is_sticky(mode); }
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bool is_setuid() const { return ::is_setuid(mode); }
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bool is_setgid() const { return ::is_setgid(mode); }
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KResult stat(stat& buffer) const
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{
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if (!is_valid())
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return KResult(-EIO);
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buffer.st_rdev = encoded_device(major_device, minor_device);
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buffer.st_ino = inode.index();
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buffer.st_mode = mode;
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buffer.st_nlink = link_count;
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buffer.st_uid = uid;
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buffer.st_gid = gid;
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buffer.st_dev = 0; // FIXME
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buffer.st_size = size;
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buffer.st_blksize = block_size;
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buffer.st_blocks = block_count;
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buffer.st_atime = atime;
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buffer.st_mtime = mtime;
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buffer.st_ctime = ctime;
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return KSuccess;
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}
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InodeIdentifier inode;
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off_t size { 0 };
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mode_t mode { 0 };
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uid_t uid { 0 };
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gid_t gid { 0 };
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nlink_t link_count { 0 };
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time_t atime { 0 };
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time_t ctime { 0 };
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time_t mtime { 0 };
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time_t dtime { 0 };
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blkcnt_t block_count { 0 };
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blksize_t block_size { 0 };
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unsigned major_device { 0 };
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unsigned minor_device { 0 };
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};
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