const ( //只读模式 O_RDONLY int = syscall.O_RDONLY // open the file read-only. //只写模式 O_WRONLY int = syscall.O_WRONLY // open the file write-only. //可读可写 O_RDWR int = syscall.O_RDWR // open the file read-write. //追加内容 O_APPEND int = syscall.O_APPEND // append data to the file when writing. //创建文件,如果文件不存在 O_CREATE int = syscall.O_CREAT // create a new file if none exists. //与创建文件一同使用,文件必须存在 O_EXCL int = syscall.O_EXCL // used with O_CREATE, file must not exist //打开一个同步的文件流 O_SYNC int = syscall.O_SYNC // open for synchronous I/O. //如果可能,打开时缩短文件 O_TRUNC int = syscall.O_TRUNC // if possible, truncate file when opened. )
打开模式的选项
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const ( ModeDir FileMode = 1 << (32 - 1 - iota) // d: is a directory 文件夹模式 ModeAppend // a: append-only 追加模式 ModeExclusive // l: exclusive use 单独使用 ModeTemporary // T: temporary file (not backed up) 临时文件 ModeSymlink // L: symbolic link 象征性的关联 ModeDevice // D: device file 设备文件 ModeNamedPipe // p: named pipe (FIFO) 命名管道 ModeSocket // S: Unix domain socket Unix 主机 socket ModeSetuid // u: setuid 设置uid ModeSetgid // g: setgid 设置gid ModeCharDevice // c: Unix character device, when ModeDevice is set Unix 字符设备,当设备模式是设置Unix ModeSticky // t: sticky 粘性的 // Mask for the type bits. For regular files, none will be set. bit位遮盖.不变的文件设置为none ModeType = ModeDir | ModeSymlink | ModeNamedPipe | ModeSocket | ModeDevice ModePerm FileMode = 0777// Unix permission bits 权限位. )