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Thu, 19 Jan 2023 08:54:10 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Pier Paolo Grassi Date: Thu, 19 Jan 2023 17:53:33 +0100 Message-ID: Subject: Re: check if coproc has output To: Sebastian Gniazdowski Cc: Zsh-Users List Content-Type: multipart/alternative; boundary="00000000000028669005f2a0c888" X-Seq: 28675 Archived-At: X-Loop: zsh-users@zsh.org Errors-To: zsh-users-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-users-request@zsh.org X-no-archive: yes List-Id: List-Help: , List-Subscribe: , List-Unsubscribe: , List-Post: List-Owner: List-Archive: --00000000000028669005f2a0c888 Content-Type: text/plain; charset="UTF-8" The pid for the coproc is easily obtained with $!, but when I tried to use it in a trap I couldn't kill the process, maybe because of the bug Roman is pointing out to. I will now try to recreate the problem with a simpler example like Roman asked so it can be better understand thanks Pier Paolo Grassi Il giorno gio 19 gen 2023 alle ore 17:36 Sebastian Gniazdowski < sgniazdowski@gmail.com> ha scritto: > I've read your post briefly and saw that you need to terminate the > background process. I recall that I was doing it in configure-wrapper that > I once wrote and that I used jobtexts. I do recall that it does contain > entry for coproc, so you could examine it in a INT trap and send a signal > to the coproc writing process. > > On Thu, 19 Jan 2023 at 16:14, Pier Paolo Grassi > wrote: > >> I did again the search in the manual and now I found it, maybe I mistyped >> the first time >> where do you suggest I try to print this array? >> >> Pier Paolo Grassi >> >> >> Il giorno gio 19 gen 2023 alle ore 17:10 Sebastian Gniazdowski < >> sgniazdowski@gmail.com> ha scritto: >> >>> Are you running zsh 3.0? That would only explain lack of following in >>> zshall: >>> >>> jobtexts >>> This associative array maps job numbers to the texts of >>> the command >>> lines that were used to start the jobs. >>> >>> Handling of the keys of the associative array is as >>> described for >>> jobdirs above. >>> >>> >>> On Thu, 19 Jan 2023 at 16:08, Pier Paolo Grassi >>> wrote: >>> >>>> I'm sorry, what is $jobtexts? it seems an empty variable to me and >>>> doesn't appear in zshall manual >>>> >>>> Pier Paolo Grassi >>>> >>>> >>>> Il giorno gio 19 gen 2023 alle ore 17:02 Sebastian Gniazdowski < >>>> sgniazdowski@gmail.com> ha scritto: >>>> >>>>> You could get pid from $jobtexts? >>>>> >>>>> On Thu, 19 Jan 2023 at 15:43, Pier Paolo Grassi >>>>> wrote: >>>>> >>>>>> I realize now the subject doesn't reflect the final version of the >>>>>> mail, sorry for that >>>>>> >>>>>> Pier Paolo Grassi >>>>>> >>>>>> >>>>>> Il giorno gio 19 gen 2023 alle ore 16:32 Pier Paolo Grassi < >>>>>> pierpaolog@gmail.com> ha scritto: >>>>>> >>>>>>> Hello, I want to populate an array from a long running process, >>>>>>> something like: >>>>>>> >>>>>>> long_running_process | while read line >>>>>>> do >>>>>>> array+=$line >>>>>>> done >>>>>>> >>>>>>> problem is, since long_running_process does not continually produce >>>>>>> output but only some times, when i try to interrupt this pipeline with >>>>>>> ctrl-c I have to wait until it produces some output for the process to >>>>>>> terminate (because, as I understand it, when it tries to write to the pipe >>>>>>> it receives a sigpipe due to it being already closed) >>>>>>> >>>>>>> I have tried various constructs with trap and even coproc to be able >>>>>>> to intercept the ctrl-c and send a sigpipe to the long running process, but >>>>>>> to no result. >>>>>>> >>>>>>> I wonder if someone has some solution to share for this problem, >>>>>>> thanks >>>>>>> >>>>>>> Pier Paolo Grassi >>>>>>> >>>>>> >>>>> >>>>> -- >>>>> Best regards, >>>>> Sebastian Gniazdowski >>>>> >>>>> >>> >>> -- >>> Best regards, >>> Sebastian Gniazdowski >>> >>> > > -- > Best regards, > Sebastian Gniazdowski > > --00000000000028669005f2a0c888 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
The pid for the coproc is easily obtained with $!, but whe= n I tried to use it in a trap I couldn't kill the process, maybe becaus= e of the bug Roman is pointing out to. I will now=C2=A0try to recreate the = problem with a simpler example like Roman asked so it can be better underst= and
thanks

Pier Paolo Grassi


Il giorno gio 19 gen 2023 alle = ore 17:36 Sebastian Gniazdowski <sgniazdowski@gmail.com> ha scritto:
I've read your= post briefly and saw that you need to terminate the background process. I = recall that I was doing it in configure-wrapper that I once wrote and that = I used jobtexts. I do recall that it does contain entry for coproc, so you = could examine it in a INT trap and send a signal to the coproc writing proc= ess.

On Thu, 19 Jan 2023 at 16:14, Pier Paolo Grassi <pierpaolog@gmail.com> w= rote:
I did again the search in the manual and now I found it, maybe I m= istyped the first time
where do you suggest I try to print this array?<= /div>

Pier Paolo Grassi


Il giorno gio 19 gen 2023 alle ore 17:10= Sebastian Gniazdowski <sgniazdowski@gmail.com> ha scritto:
Are you r= unning zsh 3.0? That would only explain lack of following in zshall:
<= div class=3D"gmail_default" style=3D"font-family:"times new roman"= ;,serif">
=C2=A0 =C2=A0 =C2=A0 =C2=A0jobtexts
=C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 This associative array maps job n= umbers to the texts of the command
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 lines that were used to start the jobs.

=C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Handling =C2=A0of =C2=A0the keys of the = associative array is as described for
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0= =C2=A0 =C2=A0 jobdirs above.


On Thu, 19 Jan= 2023 at 16:08, Pier Paolo Grassi <pierpaolog@gmail.com> wrote:
I'm sorry, wh= at is $jobtexts? it seems an empty variable to me and doesn't appear in= zshall manual

Pier Paolo Grassi


Il giorno gio 19 gen 2023 alle = ore 17:02 Sebastian Gniazdowski <sgniazdowski@gmail.com> ha scritto:
= You could get pid from $jobtexts?

On Thu, 19 Jan 2023 at 15:43, Pier P= aolo Grassi <p= ierpaolog@gmail.com> wrote:
I realize now the subject doesn't r= eflect the final version of the mail, sorry for that

=
Pier Paolo Grassi

Il giorno gio 19 gen 2023 alle ore 16:32 Pier Paolo Grassi <pierpaolog@gmail.com> ha scritto:


--
Best regards,
Sebastian Gniazdowski


--
Best regards,
Sebastian Gniazdowski


--
Best regards,
Sebastian Gniazdowski
--00000000000028669005f2a0c888--