select(2) gawk extension

[Andy Spencer]

I started writing a GNU Awk extension that provides an interfaces to the
select(2) system call so that awk can read input from different sources
without blocking forever.

So far the interface I have is:

select(how, timeout, fd, ..)

how is one of: to, from, except, or any
timeout is an optional timeout in seconds
fd, .. is a list of strings representing file descriptors

I was wondering if anyone had any thoughts on this, and whether it might
be possible to get this extension included in the GNU Awk distribution.
I've pasted an example and a rough draft of the source code here:

Example: http://vpaste.net/3QIGf
Source: http://vpaste.net/YDR5z

Thanks

[Aharon Robbins]

In article <20120124094...@c.gateway.2wire.net>,

Andy Spencer <andy7...@gmail.com> wrote:
>I started writing a GNU Awk extension that provides an interfaces to the
>select(2) system call so that awk can read input from different sources
>without blocking forever.
>
>So far the interface I have is:
>
> select(how, timeout, fd, ..)
>
> how is one of: to, from, except, or any
> timeout is an optional timeout in seconds

Don't most selects support at least milliseconds?

> fd, .. is a list of strings representing file descriptors

This should be an array of strings, each of which represents an
open redirection. Maybe that's what you meant?

>I was wondering if anyone had any thoughts on this, and whether it might
>be possible to get this extension included in the GNU Awk distribution.

Getting something included is a matter of signing paperwork. Be in
touch with me offline.

>I've pasted an example and a rough draft of the source code here:
>
> Example: http://vpaste.net/3QIGf
> Source: http://vpaste.net/YDR5z

Will try to take a look at them.

>Thanks

Sure,

Arnold
--
Aharon (Arnold) Robbins arnold AT skeeve DOT com
P.O. Box 354 Home Phone: +972 8 979-0381
Nof Ayalon Cell Phone: +972 50 729-7545
D.N. Shimshon 99785 ISRAEL

[Aharon Robbins]

In article <jfpda0$5u5$1...@dont-email.me>,

Aharon Robbins <arn...@skeeve.com> wrote:
>In article <20120124094...@c.gateway.2wire.net>,
>Andy Spencer <andy7...@gmail.com> wrote:
>>I started writing a GNU Awk extension that provides an interfaces to the
>>select(2) system call so that awk can read input from different sources
>>without blocking forever.
>>
>>So far the interface I have is:
>>
>> select(how, timeout, fd, ..)
>>
>> how is one of: to, from, except, or any
>> timeout is an optional timeout in seconds
>
>Don't most selects support at least milliseconds?
>
>> fd, .. is a list of strings representing file descriptors
>
>This should be an array of strings, each of which represents an
>open redirection. Maybe that's what you meant?

Ah - looked at your code. Now I see what you mean. Not too unreasonable.

>>I was wondering if anyone had any thoughts on this, and whether it might
>>be possible to get this extension included in the GNU Awk distribution.
>
>Getting something included is a matter of signing paperwork. Be in
>touch with me offline.
>
>>I've pasted an example and a rough draft of the source code here:
>>
>> Example: http://vpaste.net/3QIGf
>> Source: http://vpaste.net/YDR5z

Please try to follow the gawk coding style more (K&R layout). Also, please
use strcmp(x, y) == 0 instead of !strcmp.

Thanks,