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I'm running a legacy application in MS-DOS 6.22, which writes and reads some files in a folder. This folder is shared in my LAN and I'm trying to read these files, but I can't because these files are locked by this legacy application.

I'm running SHARE.EXE in my config.sys with:

INSTALL=C:\DOS\SHARE.EXE /L:1 /F:4096

This command doesn't work with /L:0, which I thought would disable filelocking.

Is there a way to prevent/disable filelocking before starting this application? Or some way to read a locked file in MS-DOS?

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  • Doesn't seem to be a way to sidestep this without intimate knowledge of this program and hacking it. I do wonder if you could run this under a 32-bit version of Windows with the NTVDM (like XP) and access concurrently that way.
    – LawrenceC
    Commented Jan 21, 2020 at 19:39
  • Is there a way to prevent/disable filelocking before starting this application? Of course you can. But the application will fail while starting or while trying to access the file with exclusive lock. some way to read a locked file in MS-DOS? Try to put this file onto mapped network drive.
    – Akina
    Commented Jan 21, 2020 at 19:48
  • @LawrenceC I didn't try it. This application has some kind of license which takes HDD serial number... So I cannot run in another computer neither in a VM like VMware or VirtualBox... I could format and install WinXP directly in that machine, but I'm not sure if I will lost that license...
    – guijob
    Commented Jan 21, 2020 at 19:50
  • @Akina, Could you guide me in how to disable file locking without disabling file sharing? I want to give it a shot. This file is already in a mapped network drive, I'm trying to access in my Windows 10.
    – guijob
    Commented Jan 21, 2020 at 19:58
  • How are you using LAN in MS-DOS 6.22?
    – harrymc
    Commented Jan 21, 2020 at 21:24

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