# string FileSystemManager.openSync(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

Open file synchronously, return file descriptor

# parameter

attribute	type	Default values	Required	Introductions
filePath	string		yes	File path (Local path)
flag	string	r	no	File system flag, default: 'r'

object.flag Legal value

value	Introductions	Minimum version
a	Open the file for appending. If the file does not exist, create the file
ax	Similar to 'a ', but fails if path exists
a+	Open the file for reading and appending. If the file does not exist, create the file
ax+	Similar to 'a + ', but fails if path exists
as	Open the file for appending (in sync mode). If the file does not exist, create the file
as+	Open files for reading and appending (in synchronous mode). If the file does not exist, create the file
r	Open the file for reading. If the file does not exist, an exception occurs
r+	Open files for reading and writing. If the file does not exist, an exception occurs
in	Open the file for writing. Create a file if it does not exist, and truncate it if it exists
wx	Similar to 'w ', but fails if path exists
w+	Open files for reading and writing. Create a file if it does not exist, and truncate it if it exists
wx+	Similar to 'w + ', but fails if path exists

File descriptor

Error code	Error message	Introductions
	fail No such file or directory "${filePath}"	There is no parent directory

const fs = wx.getFileSystemManager()
const fd = fs.openSync({
  filePath: `${wx.env.USER_DATA_PATH}/hello.txt`, 
  flag: 'a+'
})
console.log(fd)