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004e86ff19
1.重构：VFS 2. 重构：ProcFS 3. 重构：DevFS 4. 重构：FAT32 5. 重构：AHCI驱动 6. 新增：RamFS 7. 新增：MountFS 8. 新增：FAT12 9. 新增：FAT16 10. 重构：设备抽象 Co-authored-by: guanjinquan <1666320330@qq.com> Co-authored-by: DaJiYuQia <88259094+DaJiYuQia@users.noreply.github.com>
59 lines
2.5 KiB
C
59 lines
2.5 KiB
C
/**
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* @file fcntl.h
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* @author fslongjin (longjin@RinGoTek.cn)
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* @brief
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* @version 0.1
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* @date 2022-04-26
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*
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* @copyright Copyright (c) 2022
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*
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*/
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#pragma once
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#define O_RDONLY 00000000 // Open Read-only
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#define O_WRONLY 00000001 // Open Write-only
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#define O_RDWR 00000002 // Open read/write
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#define O_ACCMODE 00000003 // Mask for file access modes
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#define O_CREAT 00000100 // Create file if it does not exist
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#define O_EXCL 00000200 // Fail if file already exists
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#define O_NOCTTY 00000400 // Do not assign controlling terminal
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#define O_TRUNC 00001000 // 文件存在且是普通文件，并以O_RDWR或O_WRONLY打开，则它会被清空
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#define O_APPEND 00002000 // 文件指针会被移动到文件末尾
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#define O_NONBLOCK 00004000 // 非阻塞式IO模式
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#define O_DSYNC 00010000 // used to be O_SYNC, see below
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#define FASYNC 00020000 // fcntl, for BSD compatibility
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#define O_DIRECT 00040000 // direct disk access hint
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#define O_LARGEFILE 00100000
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#define O_DIRECTORY 00200000 // 打开的必须是一个目录
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#define O_NOFOLLOW 00400000 // Do not follow symbolic links
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#define O_NOATIME 01000000
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#define O_CLOEXEC 02000000 // set close_on_exec
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/*
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* The constants AT_REMOVEDIR and AT_EACCESS have the same value. AT_EACCESS is
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* meaningful only to faccessat, while AT_REMOVEDIR is meaningful only to
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* unlinkat. The two functions do completely different things and therefore,
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* the flags can be allowed to overlap. For example, passing AT_REMOVEDIR to
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* faccessat would be undefined behavior and thus treating it equivalent to
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* AT_EACCESS is valid undefined behavior.
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*/
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// 作为当前工作目录的文件描述符（用于指代cwd）
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#define AT_FDCWD -100
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#define AT_SYMLINK_NOFOLLOW 0x100 /* Do not follow symbolic links. */
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#define AT_EACCESS 0x200 /* Test access permitted for effective IDs, not real IDs. */
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#define AT_REMOVEDIR 0x200 /* Remove directory instead of unlinking file. */
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#define AT_SYMLINK_FOLLOW 0x400 /* Follow symbolic links. */
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#define AT_NO_AUTOMOUNT 0x800 /* Suppress terminal automount traversal */
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#define AT_EMPTY_PATH 0x1000 /* Allow empty relative pathname */
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#define AT_STATX_SYNC_TYPE 0x6000 /* Type of synchronisation required from statx() */
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#define AT_STATX_SYNC_AS_STAT 0x0000 /* - Do whatever stat() does */
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#define AT_STATX_FORCE_SYNC 0x2000 /* - Force the attributes to be sync'd with the server */
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#define AT_STATX_DONT_SYNC 0x4000 /* - Don't sync attributes with the server */
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#define AT_RECURSIVE 0x8000 /* Apply to the entire subtree */ |