# FileSystemManager.fstat(Object object)

Start from base library version 2.16.1. Please remaining backward compatible.

with Promise style call: Not supported

Mini Program plugin: Support, need to Mini Program base library version no less than 2.19.2

Get status information for files

# parameter

# Object object

attribute	type	Required	Introductions
fd	string	yes	File descriptor. fd adopt FileSystemManager.open or FileSystemManager.openSync Interface acquisition
success	function	no	Interface calls the successful callback function
fail	function	no	Interface calls failed callback functions
complete	function	no	Callback function at the end of an interface call (both successful and unsuccessful calls are executed)

# object.success callback

# parameter

# Object res

attribute	type	Introductions
stats	Stats	Stats Object that contains the state of the file

# object.fail callback

# parameter

# Object res

attribute	type	Introductions
errMsg	string	Error message

res.errMsg Legal value

value	Introductions	Minimum version
bad file descriptor	Invalid file descriptor
fail permission denied	Specified fd Path not read

# sample code

const fs = wx.getFileSystemManager()
// Open the file
fs.open({
  filePath: `${wx.env.USER_DATA_PATH}/hello.txt`, 
  flag: 'a+',
  success(res) {
    // Get status information for files
    fs.fstat({
      fd: res.fd,
      success(res) {
        console.log(res.stats)
      }
    })
  }
})