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- /**
- * @file fcntl.h
- * @author fslongjin ([email protected])
- * @brief
- * @version 0.1
- * @date 2022-04-26
- *
- * @copyright Copyright (c) 2022
- *
- */
- #pragma once
- #define O_RDONLY 00000000 // Open Read-only
- #define O_WRONLY 00000001 // Open Write-only
- #define O_RDWR 00000002 // Open read/write
- #define O_ACCMODE 00000003 // Mask for file access modes
- #define O_CREAT 00000100 // Create file if it does not exist
- #define O_EXCL 00000200 // Fail if file already exists
- #define O_NOCTTY 00000400 // Do not assign controlling terminal
- #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
- #define O_APPEND 00002000 // 文件指针会被移动到文件末尾
- #define O_NONBLOCK 00004000 // 非阻塞式IO模式
- #define O_EXEC 00010000 // 以仅执行的方式打开（非目录文件）
- #define O_SEARCH 00020000 // Open the directory for search only
- #define O_DIRECTORY 00040000 // 打开的必须是一个目录
- #define O_NOFOLLOW 00100000 // Do not follow symbolic links
- /*
- * The constants AT_REMOVEDIR and AT_EACCESS have the same value. AT_EACCESS is
- * meaningful only to faccessat, while AT_REMOVEDIR is meaningful only to
- * unlinkat. The two functions do completely different things and therefore,
- * the flags can be allowed to overlap. For example, passing AT_REMOVEDIR to
- * faccessat would be undefined behavior and thus treating it equivalent to
- * AT_EACCESS is valid undefined behavior.
- */
- // 作为当前工作目录的文件描述符（用于指代cwd）
- #define AT_FDCWD -100
- #define AT_SYMLINK_NOFOLLOW 0x100 /* Do not follow symbolic links. */
- #define AT_EACCESS 0x200 /* Test access permitted for effective IDs, not real IDs. */
- #define AT_REMOVEDIR 0x200 /* Remove directory instead of unlinking file. */
- #define AT_SYMLINK_FOLLOW 0x400 /* Follow symbolic links. */
- #define AT_NO_AUTOMOUNT 0x800 /* Suppress terminal automount traversal */
- #define AT_EMPTY_PATH 0x1000 /* Allow empty relative pathname */
- #define AT_STATX_SYNC_TYPE 0x6000 /* Type of synchronisation required from statx() */
- #define AT_STATX_SYNC_AS_STAT 0x0000 /* - Do whatever stat() does */
- #define AT_STATX_FORCE_SYNC 0x2000 /* - Force the attributes to be sync'd with the server */
- #define AT_STATX_DONT_SYNC 0x4000 /* - Don't sync attributes with the server */
- #define AT_RECURSIVE 0x8000 /* Apply to the entire subtree */
- /**
- * @brief 打开文件的接口
- *
- * @param path 文件路径
- * @param options 打开选项
- * @param ...
- * @return int 文件描述符
- */
- int open(const char * path, int options, ...);
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