DOS 21H appends dir and driver name while accessing devices like CON and NUL \ VOGONS

DOS 21H appends dir and driver name while accessing devices like CON and NUL

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First post, by cyberwalker

Posted on 2005-06-23, 14:04

cyberwalker Offline

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I have recompiled the source in VS2005 successfully.
But Borland's TASM.exe and Microsoft's CL.exe failed
to run against my generated DOSBOX. After tracing into
the source code, I found that it stopped in file function stat().
This is caused by DOS INT21H routines that use full
path to access devices like CON and NUL. Maybe DOS INT21H
can verify file name by looking up the device table before file
operations.

I hope this information will be helpful.

Last edited by cyberwalker on 2005-08-08, 20:09. Edited 9 times in total.

Reply 1 of 3, by Qbix

Posted on 2005-06-23, 15:30

Qbix Offline

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hmm yes that is a tricky problem
our devices detection doesn't work that well on all file operations.

Thank you for reporting it about that stat. I think that one might be fixable

Water flows down the stream
How to ask questions the smart way!

Reply 2 of 3, by cyberwalker

Posted on 2005-07-17, 06:11

cyberwalker Offline

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Qbix wrote:
hmm yes that is a tricky problem
our devices detection doesn't work that well on all file operations.

Thank you for reporting it about that stat. I think that one might be fixable

Thank you for your attention. I have uploaded patch code for testing.

Reply 3 of 3, by cyberwalker

Posted on 2005-07-19, 20:43

cyberwalker Offline

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Patch code refined. Only one file and few lines need changing.

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