基于golang实现简单的文件监控

本文主要是介绍基于golang实现简单的文件监控，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

基于golang实现简单的文件监控

package mainimport ("log""syscall""unsafe"
)type FileNotifyInformation struct {Action uint32Name   string
}func Fswatch(path string) (chan FileNotifyInformation, error) {handle, err := syscall.CreateFile(syscall.StringToUTF16Ptr(path),0x0001,syscall.FILE_SHARE_READ|syscall.FILE_SHARE_WRITE|syscall.FILE_SHARE_DELETE,nil,syscall.OPEN_EXISTING,syscall.FILE_FLAG_BACKUP_SEMANTICS,0,)if err != nil {return nil, err}c := make(chan FileNotifyInformation, 4)go func() {defer syscall.CloseHandle(handle)defer close(c)buflen := 1024buf := make([]byte, buflen)for {err := syscall.ReadDirectoryChanges(handle,&buf[0],uint32(buflen),true,syscall.FILE_NOTIFY_CHANGE_FILE_NAME|syscall.FILE_NOTIFY_CHANGE_DIR_NAME|syscall.FILE_NOTIFY_CHANGE_ATTRIBUTES|syscall.FILE_NOTIFY_CHANGE_SIZE|syscall.FILE_NOTIFY_CHANGE_LAST_WRITE,nil,&syscall.Overlapped{},0,)if err != nil {break}var offset uint32for {raw := (*syscall.FileNotifyInformation)(unsafe.Pointer(&buf[offset]))buf := (*[syscall.MAX_PATH]uint16)(unsafe.Pointer(&raw.FileName))name := syscall.UTF16ToString(buf[:raw.FileNameLength/2])info := FileNotifyInformation{Action: raw.Action,Name:   name,}c <- infoif raw.NextEntryOffset == 0 {break}offset += raw.NextEntryOffsetif offset >= 1024 {break}}}}()return c, nil
}func main() {c, err := Fswatch("E:\\company")if err != nil {log.Fatalln(err)}for info := range c {switch info.Action {case 1:log.Println("Create", info.Name)case 2:log.Println("Delete", info.Name)case 3:log.Println("Update", info.Name)case 4:log.Println("RenameFrom", info.Name)case 5:log.Println("RenameTo", info.Name)}}
}

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