On Thu, Mar 8, 2018 at 4:21 AM, Eric Iverson wrote:
> I recently and independently became aware of the problems with 2!:2. This
> is a serious issue and we'll be working on it for this beta cycle. Any
> input or suggestions your provide will be welcome.
I've created a pull request with a descript
On Thu, Mar 8, 2018 at 5:01 AM, Danil Osipchuk wrote:
> The issue with 2!:2 certainly is(was) not only with the memory management.
> If I remember correctly, there is a table (may be the 1!:20) which tracks
> files in use and their descriptors ( FDs or FILE*s - again not sure now)
> and the suppor
On Thu, Mar 8, 2018 at 5:01 AM, Chris Double wrote:
> I assume 'fa' does some sort of recursive freeing of memory. instead
> of removing the 'fa' call, Is a 'ras(c)' needed to increment some
> reference count? Something like:
This change also fixes 1!:20:
2!:2 '/bin/ls'
14825 94258605368592 94
I assume 'fa' does some sort of recursive freeing of memory. instead
of removing the 'fa' call, Is a 'ras(c)' needed to increment some
reference count? Something like:
B jtadd2(J jt,F f1,F f2,C*cmd){A c,x;
if(f1==NULL) {jt->fopn+=2;R 1;};
GATV(c,LIT,1+strlen(cmd),1,0);MC(CAV(c)+1,cmd,AN(c)-1);cm
The issue with 2!:2 certainly is(was) not only with the memory management.
If I remember correctly, there is a table (may be the 1!:20) which tracks
files in use and their descriptors ( FDs or FILE*s - again not sure now)
and the supporting 2!:2 implementation is inconsistent when filling it
http:
If I comment out the call to "fa(c)" in 'jtadd2' then the segfault
goes away. Is there some memory management issue related to the
allocation and freeing of the cmd string that is going on?
On Thu, Mar 8, 2018 at 4:31 AM, Raul Miller wrote:
> Huh...
>
> I wonder if there's something uninitialized
Huh...
I wonder if there's something uninitialized in libedit (or perhaps
some other supporting library) that needs to be initialized?
--
Raul
On Wed, Mar 7, 2018 at 10:26 AM, Chris Double wrote:
> On Thu, Mar 8, 2018 at 3:29 AM, Chris Double
> wrote:
>> I will investigate more though why t
On Thu, Mar 8, 2018 at 3:29 AM, Chris Double wrote:
> I will investigate more though why the instability occurs.
On closer debugging, it seems to be the add2 call, not the 'fdopen'.
With no changes this errors:
2!:2 '/bin/ls'
10554 93976423924960 93976423925520
1 2
Segmentation fault (cor
I can reproduce this segmentation fault.
I have also been able to reproduce your "ill-formed number" problem. Very odd..
Thanks,
--
Raul
On Wed, Mar 7, 2018 at 9:29 AM, Chris Double wrote:
> I'll have to investigate more to work out why the instability happens.
> Just a note on:
>
>> It's t
Chris Double,
I recently and independently became aware of the problems with 2!:2. This
is a serious issue and we'll be working on it for this beta cycle. Any
input or suggestions your provide will be welcome.
On Wed, Mar 7, 2018 at 9:29 AM, Chris Double
wrote:
> I'll have to investigate more
I'll have to investigate more to work out why the instability happens.
Just a note on:
> It's the pipe that's used to communicate between the processes, the
> fdopen creates buffers which do need to be independent.
The fdopen calls are used to get a FILE* for the integer file handle
which are onl
After some reflection: your observations about the fdopen placement
are not invalid. But it shouldn't be the case that J needs to change
here:
It's the pipe that's used to communicate between the processes, the
fdopen creates buffers which do need to be independent.
Still, if the buffers in the p
I tried the current j807 beta on an ubuntu machine, and did not
encounter the instability. However, since memory corruption does not
produce reliable behaviors, I'm not sure that that matters.
That said, the purpose of that fdopen is to communicate between the
two forked processes, and moving it a
I took a quick look at the 2!:2 code and it's mostly ok in that the
file descriptors returned in the array are usable. Unfortunately using
it causes spurious errors crashes:
$ jconsole
a=: (2!:2) '/bin/ls -l'
a
28836 94660922311904 94660922312464
b =: mema 1024
|ill-formed number
.
If it's broken...
The top level definition for 2!:2 is at
https://github.com/jsoftware/jsource/blob/master/jsrc/x.c#L90
(And, remember, line 4 of those .c files identifies the purpose of the
file. And, in the current versions, if you can't find a function
definition, try pasting a "jt" at the fro
Last time check, those foreign conjunctions did not work under linux. It
was a long standing bug but not fixed.
On Mon, Mar 5, 2018, 5:16 PM Nick S wrote:
> ssh can be run without pty allocation, the remote command can just be run
> under pipes, for openssh, the option is -T if I read the manual
ssh can be run without pty allocation, the remote command can just be run
under pipes, for openssh, the option is -T if I read the manual pages
correctly. The real question is whether the program you want to run
remotely needs a pty (Or the signal processing changes you can get from the
pry). Cert
You are correct.
There is a lot of OS specific code needed for PTYs, and most everyone
has other higher priorities than working through all those issues.
Thanks,
--
Raul
On Sat, Mar 3, 2018 at 6:30 AM, Omar Passos Torres de Almeida
wrote:
> Thanks!
> I know those technics, but i was thinking
Thanks!
I know those technics, but i was thinking in something coded in pure J
or some addon. I think not exists something like those in J.
Omar
On 03/02/2018 11:25 PM, Raul Miller wrote:
Working with ptys is kind of tricky, you'll want a program that
specializes in that, like expect or mayb
Working with ptys is kind of tricky, you'll want a program that
specializes in that, like expect or maybe even something like tmux.
https://en.wikipedia.org/wiki/Expect
https://en.wikipedia.org/wiki/Tmux
If you're working with tmux, for example, you can use tmux send-keys
to "type" things into y
Hi
How can i interact with a task like ssh using task.ijs (spawn or shell)?
eg.
load 'task'
password=. 'mypassword'
process=. shell 'ssh [email protected]'
How to send the password? and then interact with the pty?
login@host$ ls -la
Is there some way to do that?
Thanks in advance,
Omar
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