SYS "XOS_Find",&80

From	Paul Stewart <phorefaux@gmail.com>
Newsgroups	comp.sys.acorn.programmer
Subject	SYS "XOS_Find",&80
Date	2025-12-30 22:36 +0000
Organization	A noiseless patient Spider
Message-ID	<662a8a935c.Paul@phorefaux> (permalink)

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Hi all,

Hoping someone can help point out my mistake.
Issue with SYS"XOS_Find",&80.

Using SYS "XOS_Find",&80 to create a file, which is working fine.
Just trying to trap errors when it is unable to create the file.
Before I create the file I am using OS_File 17 to check if it exists 
first, which again is working okay.

My bit of code is:
SYS "XOS_Find",&80,fname$ TO fhandle%;flags%
IF (flags% AND 1)<>0 SYS "OS_GenerateError",fhandle%

If I then try an save to say a readonly ShareFS share, it generates 
expected error:

30 Dec 22:16:12 100   Message  : Shared disc is read only at line 157

This I can trap and program continues to function.

If I try an save to Resources (yes I know it is readonly and nobody should 
be attempting to save to it, but just for completeness) I receive the 
following error:


30 Dec 22:08:05 100   Message  : Internal error: abort on instruction 
fetch at &2

With this error the program dies directly after running SYS 
"XOS_Find",&80,fname$ TO fhandle%;flags%

-- 
Paul Stewart
Sent from A9home running RISC OS 4.42

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Thread

SYS "XOS_Find",&80 Paul Stewart <phorefaux@gmail.com> - 2025-12-30 22:36 +0000
  Re: SYS "XOS_Find",&80 Martin <News04@avisoft.f9.co.uk> - 2025-12-30 23:33 +0000
    Re: SYS "XOS_Find",&80 Paul Stewart <phorefaux@gmail.com> - 2025-12-30 23:57 +0000
    Re: SYS "XOS_Find",&80 Paul Stewart <phorefaux@gmail.com> - 2025-12-31 13:16 +0000
      Re: SYS "XOS_Find",&80 Paul Stewart <phorefaux@gmail.com> - 2025-12-31 13:43 +0000

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