lost sysread

lost sysread

[Ray Andrews]

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Any ideas?


0 /aWorking/Zsh/Source/Wk 2 % . test1; print -r -- $(( srand32() ))
srand32:4: command not found: sysread
4

0 /aWorking/Zsh/Source/Wk 2 % exit

0 /aWorking/Zsh/Source/Wk 1 % . test1; print -r -- $(( srand32() ))
3551593729

0 /aWorking/Zsh/Source/Wk 1 % zsh -f
b6-12-Deb12b# . test1; print -r -- $(( srand32() ))
srand32:4: command not found: sysread
4
b6-12-Deb12b# exit

0 /aWorking/Zsh/Source/Wk 1 % . test1; print -r -- $(( srand32() ))
2230494374

... for some unknown reason one of my open shells can find sysread while 
others can't.  I use hibernate, so the OK shell has been open for far 
too long to digress as to which commands might have put it into a 
friendly mood as to sysread.  How on earth do I figure this out?  
Printing out all my variables, there's dozens of differences, but there 
always are.  Any hot prospects? I can't think where I'd even begin.  How 
can a builtin ever not be found? I know sometimes one 'level' of command 
can mask another, like a function 'sysread' might mask the builtin, but 
that's not the case here.  It's not disabled.  Nothing else seems to be 
broken or missing.  No idea.



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Re: lost sysread

[Lawrence Velázquez]

On Fri, May 3, 2024, at 6:42 PM, Ray Andrews wrote:
> ... for some unknown reason one of my open shells can find sysread 
> while others can't.

The sysread builtin is provided by the zsh/system module.  You have
to load the module and enable sysread before you can use it.

	zmodload -F zsh/system b:sysread

This has already been done in the shell that works, either by you
or some code you sourced.

-- 
vq

Re: lost sysread

[Bart Schaefer]

On Fri, May 3, 2024 at 4:56 PM Lawrence Velázquez <larryv@zsh.org> wrote:
>
> The sysread builtin is provided by the zsh/system module.  You have
> to load the module and enable sysread before you can use it.
>
>         zmodload -F zsh/system b:sysread

Just
    zmodload zsh/system
will enable all the builtins, it's not actually necessary to
explicitly call out sysread.

Re: lost sysread

[Ray Andrews]

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On 2024-05-03 16:55, Lawrence Velázquez wrote:
> The sysread builtin is provided by the zsh/system module. You have
> to load the module and enable sysread before you can use it.
>
> 	zmodload -F zsh/system b:sysread
>
> This has already been done in the shell that works, either by you
> or some code you sourced.
Never did that knowingly, anyway that fixes it.  I'll keep an eye on 
when/what might be loading that module without my knowledge.




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Re: lost sysread

[Lawrence Velázquez]

On Fri, May 3, 2024, at 7:57 PM, Bart Schaefer wrote:
> On Fri, May 3, 2024 at 4:56 PM Lawrence Velázquez <larryv@zsh.org> wrote:
>>
>> The sysread builtin is provided by the zsh/system module.  You have
>> to load the module and enable sysread before you can use it.
>>
>>         zmodload -F zsh/system b:sysread
>
> Just
>     zmodload zsh/system
> will enable all the builtins, it's not actually necessary to
> explicitly call out sysread.

Right; I just didn't want to recommend a command that would do more
than absolutely necessary.

-- 
vq

Re: lost sysread

[Ray Andrews]

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On 2024-05-04 22:23, Lawrence Velázquez wrote:
> Just
>>      zmodload zsh/system
>> will enable all the builtins, it's not actually necessary to
>> explicitly call out sysread.
> Right; I just didn't want to recommend a command that would do more
> than absolutely necessary.
Supposing the error msg was: "Module 'sysread' is not loaded"?
>

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Re: lost sysread

[Bart Schaefer]

On Sun, May 5, 2024 at 6:17 AM Ray Andrews <rayandrews@eastlink.ca> wrote:
>
> Supposing the error msg was: "Module 'sysread' is not loaded"?

If the module hasn't been loaded yet, how is the shell supposed to
know that sysread isn't an external command?   The whole point of
modules is that the base shell does not have a compiled-in list of all
the possible things that could come from modules.

Re: lost sysread

[Ray Andrews]

On 2024-05-05 08:42, Bart Schaefer wrote:
> On Sun, May 5, 2024 at 6:17 AM Ray Andrews <rayandrews@eastlink.ca> wrote:
>> Supposing the error msg was: "Module 'sysread' is not loaded"?
> If the module hasn't been loaded yet, how is the shell supposed to
> know that sysread isn't an external command?   The whole point of
> modules is that the base shell does not have a compiled-in list of all
> the possible things that could come from modules.
Sure, it might not be workable.  Just an idea.  As you say there'd have 
to be some list and that wouldn't be worth the weight.   Or some way of 
quickly scanning what's available:
zmodload --quick-check ... sorta
Not worth it since I suppose one only need bump into the problem once to 
be made wise to 'not found' being sometimes 'not loaded' -- it never 
happened to me before this.  It seems I usually end up with the module 
loaded even tho I don't know exactly where it gets done. I like 
helpfulness but not at the cost of bloat.  Yup, if it couldn't be done 
easily then it's not worth worrying about.

>