Setting the DenyMode against a file

[JANorman]

Hi there,

Thanks for such a great library and tool. We had a question regarding the libraries ability to pass trough the DenyMode to an underlying SMB server.

We have an SMB connection, mounted like such:

mount -t cifs -o rw,soft,nolock,iocharset=utf8,file_mode=0600,dir_mode=0700,user='admin',password='***',vers=2.0,mapchars,uid=5000,gid=5000 '//IPADDRESS/sambashare' '/mnt/CIFS/77ae37408e5e9d18c5a04987c/'

With portalocker we are running:

import portalocker
import time

file = open('/mnt/CIFS/77ae37408e5e9d18c5a04987c/output.txt', 'r+')
portalocker.lock(file, portalocker.LOCK_EX)
time.sleep(5)

When we inspect the smbstatus we observe the following:

Locked files:
Pid          User(ID)   DenyMode   Access      R/W        Oplock           SharePath   Name   Time
--------------------------------------------------------------------------------------------------
3443         1000       DENY_NONE  0x12019f    RDWR       EXCLUSIVE+BATCH  /sambashare   output.txt   Fri Oct  8 04:50:04 2021

It has essentially set the access mask + oplock, but not the DenyMode.

Is there an additional flag we can set to set DENY_WRITE?

Many thanks in advance.

[wolph]

I've done quite a bit of searching but I can't seem to find any method of setting the DenyMode from Python. I would be happy to add it to the library if I could find a way however.

[JANorman]

Thanks @wolph - For reference I have been able to accomplish with this SMB protocol library — https://github.com/jborean93/smbprotocol