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45 lines
1.3 KiB
ReStructuredText
45 lines
1.3 KiB
ReStructuredText
fcntl.h
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====================================
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简介
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========
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文件操作
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函数列表:
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========
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``int open(const char * path,int options, ...)``
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传入文件路径,和文件类型(详细请看下面的宏定义),将文件打开并返回文件id。
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宏定义(粘贴自代码,了解即可):
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========
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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_EXEC 00010000 // 以仅执行的方式打开(非目录文件)
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#define O_SEARCH 00020000 // Open the directory for search only
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#define O_DIRECTORY 00040000 // 打开的必须是一个目录
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#define O_NOFOLLOW 00100000 // Do not follow symbolic links
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