Hello,
Does nobuf(1) help?
http://jdebp.uk/Softwares/djbwares/guide/nobuf.html
Note: it tackles exactly the POSIX feature to line buffer output to
tty's by providing one to the program in the pipeline, but without using
any shared-object magic.
Have not used it (yet) though.
Best Regards
Rodrigo Martins wrote:
> What if instead of changing every program we changed the standard
> library? We could make stdio line buffered by setting an environment
> variable.
I applaude this idea! Environment variables seems to be the right spot
for any config a library could need: are unobstrusive
On Sun, May 29, 2022 at 10:20:05PM +, Rodrigo Martins wrote:
> It was thus said that the Great Markus Wichmann once stated:
> > And you fundamentally cannot change anything about the userspace of another
> > program, at least not in UNIX.
>
> When I open file descriptors and exec(3) the new pr
It was thus said that the Great Markus Wichmann once stated:
> And you fundamentally cannot change anything about the userspace of another
> program, at least not in UNIX.
When I open file descriptors and exec(3) the new program inherits those. Is
that not chaning the userspace of another proces
On Sat, May 28, 2022 at 08:32:57PM +0200, Markus Wichmann wrote:
> ultimately terminates on the terminal. But who knows if that is the
> case? Pipelines ending in a call to "less" will terminate on the
> terminal, pipelines ending in a call to "nc" will not. So the shell
> can't know, only the last
On Sat, May 28, 2022 at 07:19:24PM +, Rodrigo Martins wrote:
> Hello, Markus,
>
> Thank for filling in the details. I should do more research next time.
>
> I tried to write a program that does the same as stdbuf(1), but using
> setbuf(3). Unfortunately it seems the buffering mode is reset acro
Hello, Markus,
Thank for filling in the details. I should do more research next time.
I tried to write a program that does the same as stdbuf(1), but using
setbuf(3). Unfortunately it seems the buffering mode is reset across exec(3),
since my program did not work. If it did that would be a clea
On Sat, May 28, 2022 at 06:09:04PM +, Hadrien Lacour wrote:
> Now, I wonder how it'd be fixed ("it" being how does the read end of the pipe
> signal to the write one the kind of buffering it wants) in a perfect world.
The problem ultimately stems from the mistaken idea that buffering is
invisi
On Sat, May 28, 2022 at 07:58:40PM +0200, Markus Wichmann wrote:
> > You can use stdbuf(1) to modify that aspect without touching the
> > program source itself.
> >
>
> Had to look up the source for that. I had heard of stdbuf, but I always
> thought that that was impossible. How can one process ch
On Sat, May 28, 2022 at 08:38:49AM +, Hadrien Lacour wrote:
> On Sat, May 28, 2022 at 03:33:16AM +, Rodrigo Martins wrote:
> > Hello,
> >
> > The problem here is I/O buffering. I suspect it to happen in the C
> > standard library, specifically on the printf function family.
You know, that
On Sat, May 28, 2022 at 03:33:16AM +, Rodrigo Martins wrote:
> Hello,
>
> The problem here is I/O buffering. I suspect it to happen in the C standard
> library, specifically on the printf function family. If I recall, the C
> standard says stdio is line-buffered when the file is an interactiv
Hello,
The problem here is I/O buffering. I suspect it to happen in the C standard
library, specifically on the printf function family. If I recall, the C
standard says stdio is line-buffered when the file is an interactive device and
let's it be fully buffered otherwise. This is likely why you
"Greg Reagle" wrote:
> I have a file named "out" (from ii) that I want to view. Of course, it can
> grow while I am viewing it. I can view it with "tail -f out" or "less +F out
> ", both of which work. I also want to apply some processing in a pipeline,
> something like "tail -f out | tr a A |
May 27, 2022, 11:43 AM, "Greg Reagle" mailto:l...@speedpost.net?to=%22Greg%20Reagle%22%20%3Clist%40speedpost.net%3E >
wrote:
>
> I have a file named "out" (from ii) that I want to view. Of course, it can
> grow while I am viewing it. I can view it with "tail -f out" or "less +F
> out", both of
On Fri, May 27, 2022 at 02:43:03PM -0400, Greg Reagle wrote:
> I have a file named "out" (from ii) that I want to view. Of course, it can
> grow while I am viewing it. I can view it with "tail -f out" or "less +F
> out", both of which work. I also want to apply some processing in a
> pipeline
Hello,
Le ven. 27 mai 2022 à 20:45, Greg Reagle a écrit :
>
> I have a file named "out" (from ii) that I want to view. Of course, it can
> grow while I am viewing it. I can view it with "tail -f out" or "less +F
> out", both of which work. I also want to apply some processing in a
> pipelin
I have a file named "out" (from ii) that I want to view. Of course, it can
grow while I am viewing it. I can view it with "tail -f out" or "less +F out",
both of which work. I also want to apply some processing in a pipeline,
something like "tail -f out | tr a A | less" but that does not work
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