On 12/19/19 3:07 PM, Bize Ma wrote:
> To: Chester Ramey
>
> On thu., dec. 19 of 2019 at 12:40, Chet Ramey () wrote:
>
>> On 12/18/19 6:40 PM, Bize Ma wrote:
>>
>
>
> The exit status is 0 if input is available on the specified file
>>> descriptor, non-zero otherwise.
>>
>> Bash-5.0 uses s
On Fri, Dec 20, 2019 at 10:40:26AM -0400, Bize Ma wrote:
> I am not the one making those comments. I don't have enough C expertise
> to neither confirm or deny them. But that also makes me unable to answer to
> the
> author of the comments in the proper way. I intended to receive something to
> cor
On Fri., 20 dec. 2019 at 3:57, Martin Schulte ()
wrote:
> Hello!
>
> > Could you please comment about this assertions:
> >
> > 1.- bash will either do a select() or an ioctl(FIONREAD), or neither
> > of them, but not both, as it should for it to work. read -t0 is broken.
> > 2.- Conclusion: re
Hello!
> Could you please comment about this assertions:
>
> 1.- bash will either do a select() or an ioctl(FIONREAD), or neither
> of them, but not both, as it should for it to work. read -t0 is broken.
> 2.- Conclusion: read -t0 is *broken* in bash. Don't use it. –
No. It works as intended
To: Chester Ramey
On thu., dec. 19 of 2019 at 12:40, Chet Ramey () wrote:
> On 12/18/19 6:40 PM, Bize Ma wrote:
>
> >>> The exit status is 0 if input is available on the specified file
> > descriptor, non-zero otherwise.
>
> Bash-5.0 uses select/FIONREAD to determine whether or not there is
On 12/18/19 6:40 PM, Bize Ma wrote:
It seems that read -t 0 should detect if there is input from a pipe (and
others).
From man bash:
If timeout is 0, read returns immediately, without trying to read any
data.
The exit status is 0 if input is available on the specified file
descriptor, n
Date:Wed, 18 Dec 2019 19:40:45 -0400
From:Bize Ma
Message-ID:
| A little delay seems to get it working:
|
| $ echo value | { read -t 0 var; } ; echo $?
| 0
It might, but that is adding no significant delay, and the
results are unpredictable.
jinx$ echo val
It seems that read -t 0 should detect if there is input from a pipe (and
others).
>From man bash:
>> If timeout is 0, read returns immediately, without trying to read any
data.
>> The exit status is 0 if input is available on the specified file
descriptor, non-zero otherwise.
So, it seems that
