[Info-vax] Suppressing DCL exit status messages

[Brian Schenkenberger]

On 2023-09-12 12:34:37 +0000, Simon Clubley said:

> On 2023-09-11, gah4 <gah4 at u.washington.edu> wrote:
>> 
>> It was a C program that I wrote, and that had exit(8); in it.
>> 
>> There was no access violation.
>> 
> 
> I am surprised nobody told you the error message could be suppressed
> if you set the right bit in the exit status you return to DCL:
> 
> $ exit 8
> %SYSTEM-W-ACCVIO, access violation, reason mask=00, virtual 
> address=0000000000000008, PC=000000007AF0D9F0, PS=00000000
> $ write sys$output $status
> %X00000008
> 
> $ exit %x10000008
> $ write sys$output $status
> %X10000008
> 
> Note that it's that specific bit which needs setting as you still get
> the message in this case:
> 
> $ exit %x40000008
> %SYSTEM-W-ACCVIO, access violation, reason mask=00, virtual 
> address=0000000040000008, PC=000000007AF0D9F0, PS=00000000
> $ write sys$output $status
> %X40000008
> 
> You can mask off the top 4 bits (the internal control flags) to
> extract out the actual number your program returned to your DCL script.
> 
> Not sure where I found this out because it's not in the manuals
> I just checked.
> 
> Simon.

See $STSDEF ;)

— VAXman