补充内容.
Signed-off-by: rick.chan <chen.yang@yuzhen-iot.com>
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@ -11,12 +11,20 @@ go env -w GO111MODULE=on
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go env -w GOPROXY=https://goproxy.cn
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```
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## 2.安装 Packages
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## 2.下载和安装 Packages
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以安装 guru 为例:
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通常,开发过程中所需要的 Package 只需要通过 go get 命令下载就可以使用,以 uuid 包为例,下载指定版本的 uuid 包命令如下:
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```bash
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go get golang.org/x/tools/cmd/guru
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go build golang.org/x/tools/cmd/guru
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mv guru $(go env GOROOT)/bin
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# 下载 Go Package
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go get github.com/satori/go.uuid@v1.2.0
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```
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有些 go 工具除了下载外还需要编译安装,以 gopls 工具为例,下载、编译和安装命令如下:
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```bash
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# 下载 gopls
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go get -v golang.org/x/tools/gopls
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# 编译并安装
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go install golang.org/x/tools/gopls
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```
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@ -31,7 +31,7 @@ func Open(name string) (*File, error)
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func OpenFile(name string, flag int, perm FileMode) (*File, error)
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```
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perm 模式如下:
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flag 如下:
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```go
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//打开方式
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@ -55,6 +55,47 @@ O_TRUNC int = syscall.O_TRUNC // if possible, truncate file when opened.
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)
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```
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perm 模式如下:
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```go
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const (
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// The single letters are the abbreviations
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// used by the String method's formatting.
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// 文件夹模式
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ModeDir FileMode = 1 << (32 - 1 - iota) // d: is a directory
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// 追加模式
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ModeAppend // a: append-only
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// 单独使用
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ModeExclusive // l: exclusive use
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// 临时文件
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ModeTemporary // T: temporary file; Plan 9 only
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// 象征性的关联
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ModeSymlink // L: symbolic link
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// 设备文件
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ModeDevice // D: device file
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// 命名管道
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ModeNamedPipe // p: named pipe (FIFO)
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// Unix 主机 socket
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ModeSocket // S: Unix domain socket
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// 设置uid
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ModeSetuid // u: setuid
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// 设置gid
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ModeSetgid // g: setgid
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// UNIX 字符串设备,当设备模式是设置unix
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ModeCharDevice // c: Unix character device, when ModeDevice is set
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// 粘性的
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ModeSticky // t: sticky
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// 非常规文件;对该文件一无所知
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ModeIrregular // ?: non-regular file; nothing else is known about this file
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// bit位遮盖,不变的文件设置为none
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// Mask for the type bits. For regular files, none will be set.
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ModeType = ModeDir | ModeSymlink | ModeNamedPipe | ModeSocket | ModeDevice | ModeCharDevice | ModeIrregular
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// 权限位
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ModePerm FileMode = 0777 // Unix permission bits
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)
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```
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### 1.3.获取文件状态
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```go
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