Thanks all for the explanations. I think I understand better now.
Chris
> On Oct 4, 2023, at 12:06 PM, o...@eigenstate.org wrote:
>
> Quoth Chris McGee :
>> Hi All,
>>
>> I was thinking about file descriptors in the context of Plan 9. On Unix an
>> fd is generally only usable by the current pr
On Wed, Oct 04, 2023 at 07:18:23AM -0400, dusan3...@gmail.com wrote:
> Also I was doing with tail -f /dev/kmesg in the background and without that
> /dev/kmesg loses the start of output up to some random moment where it shows
> it. Could the problem be that i have too many outputs?
try tail +0f
Quoth Chris McGee :
> Hi All,
>
> I was thinking about file descriptors in the context of Plan 9. On Unix an
> fd is generally only usable by the current process, and child ones through
> a fork with some special incantation if one wants to communicate one over a
> domain socket. This is possibly
Quoth dusan3...@gmail.com:
> I added some logs in /sys/src/9/port/proc.c for some tests of the scheduler,
> I want to see at what moments do real time processes take the cpu. I did that
> with simple prints with the intention of doing cat /dev/kmesg > someFile
> because all the prints are stored
btw it's very common on unix to share FDs in multi-threaded programs.
and all the pain resulting from un-synchronised FD access is available
as expected :)
On 10/4/23, hiro <23h...@gmail.com> wrote:
> file descriptors describe to the kernel which of the files you
> previously open()'ed (a syscall)
file descriptors describe to the kernel which of the files you
previously open()'ed (a syscall) you want to operator on.
it's not about security: if you want to operate on a file that another
process might have opened before, you have to be careful that the
other process isn't writing to the same
I added some logs in /sys/src/9/port/proc.c for some tests of the scheduler, I
want to see at what moments do real time processes take the cpu. I did that
with simple prints with the intention of doing cat /dev/kmesg > someFile
because all the prints are stored there.
The problem is that the
Hi All,
I was thinking about file descriptors in the context of Plan 9. On Unix an
fd is generally only usable by the current process, and child ones through
a fork with some special incantation if one wants to communicate one over a
domain socket. This is possibly for security reasons, avoiding o
