Pipe output of two programs running in parallel to another program [duplicate]

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP











up vote
-2
down vote

favorite













This question already has an answer here:



  • combine output from two commands in bash

    5 answers



I have two programs foo.sh and bar.sh both of which contain infite loops, produce continuous Output and should run in parallel. I would like to pipe the output of both those programs to a third program consumer.



Initially I only had foo.sh running and the piping was easy via



./foo.sh | ./consumer


But now I would like to add bar.sh to also send its output to consumer.



I have tried the things suggested in those answers (Answer 1, Answer 2) but they only seem to work for programs where one ends and the next gets started after the first one ends. I need them both to run in parallel.



This does not work, as it only pipes the output of foo.sh and never starts bar.sh:



( ./foo.sh ; ./bar.sh ) | ./consumer


This lucky guess gave me a syntax error: 



( ./foo.sh & ; ./bar.sh & ) | ./consumer





pipe io-redirection background-process







share|improve this question















marked as duplicate by Community♦ Aug 17 at 10:37


This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.










  • 1




    Did answer 1's command1 & command2; | ... not work for you?
    – Michael Homer
    Aug 17 at 10:10










  • To me it seemed it was only piping the output of command1 but never starting command2, as command1 will run indefinitely.
    – oh.dae.su
    Aug 17 at 10:12










  • How did it seem that way? It doesn't do that, but that's not to say there wasn't some other issue that's your real problem.
    – Michael Homer
    Aug 17 at 10:14










  • ok sorry for the wording. It only pipes the Output of command1, command2 is never started. If I reverse them, I get it the other way around.
    – oh.dae.su
    Aug 17 at 10:17






  • 1




    Yeah, exactly, that's not how it works, so you do have a different problem. command1 runs in the background and command2 starts shortly after. Try yes y & yes n ; | cat and see. You may need to provide your actual commands for someone to help you.
    – Michael Homer
    Aug 17 at 10:19















up vote
-2
down vote

favorite













This question already has an answer here:



  • combine output from two commands in bash

    5 answers



I have two programs foo.sh and bar.sh both of which contain infite loops, produce continuous Output and should run in parallel. I would like to pipe the output of both those programs to a third program consumer.



Initially I only had foo.sh running and the piping was easy via



./foo.sh | ./consumer


But now I would like to add bar.sh to also send its output to consumer.



I have tried the things suggested in those answers (Answer 1, Answer 2) but they only seem to work for programs where one ends and the next gets started after the first one ends. I need them both to run in parallel.



This does not work, as it only pipes the output of foo.sh and never starts bar.sh:



( ./foo.sh ; ./bar.sh ) | ./consumer


This lucky guess gave me a syntax error: 



( ./foo.sh & ; ./bar.sh & ) | ./consumer





pipe io-redirection background-process







share|improve this question















marked as duplicate by Community♦ Aug 17 at 10:37


This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.










  • 1




    Did answer 1's command1 & command2; | ... not work for you?
    – Michael Homer
    Aug 17 at 10:10










  • To me it seemed it was only piping the output of command1 but never starting command2, as command1 will run indefinitely.
    – oh.dae.su
    Aug 17 at 10:12










  • How did it seem that way? It doesn't do that, but that's not to say there wasn't some other issue that's your real problem.
    – Michael Homer
    Aug 17 at 10:14










  • ok sorry for the wording. It only pipes the Output of command1, command2 is never started. If I reverse them, I get it the other way around.
    – oh.dae.su
    Aug 17 at 10:17






  • 1




    Yeah, exactly, that's not how it works, so you do have a different problem. command1 runs in the background and command2 starts shortly after. Try yes y & yes n ; | cat and see. You may need to provide your actual commands for someone to help you.
    – Michael Homer
    Aug 17 at 10:19













up vote
-2
down vote

favorite









up vote
-2
down vote

favorite












This question already has an answer here:



  • combine output from two commands in bash

    5 answers



I have two programs foo.sh and bar.sh both of which contain infite loops, produce continuous Output and should run in parallel. I would like to pipe the output of both those programs to a third program consumer.



Initially I only had foo.sh running and the piping was easy via



./foo.sh | ./consumer


But now I would like to add bar.sh to also send its output to consumer.



I have tried the things suggested in those answers (Answer 1, Answer 2) but they only seem to work for programs where one ends and the next gets started after the first one ends. I need them both to run in parallel.



This does not work, as it only pipes the output of foo.sh and never starts bar.sh:



( ./foo.sh ; ./bar.sh ) | ./consumer


This lucky guess gave me a syntax error: 



( ./foo.sh & ; ./bar.sh & ) | ./consumer





pipe io-redirection background-process







share|improve this question
















This question already has an answer here:



  • combine output from two commands in bash

    5 answers



I have two programs foo.sh and bar.sh both of which contain infite loops, produce continuous Output and should run in parallel. I would like to pipe the output of both those programs to a third program consumer.



Initially I only had foo.sh running and the piping was easy via



./foo.sh | ./consumer


But now I would like to add bar.sh to also send its output to consumer.



I have tried the things suggested in those answers (Answer 1, Answer 2) but they only seem to work for programs where one ends and the next gets started after the first one ends. I need them both to run in parallel.



This does not work, as it only pipes the output of foo.sh and never starts bar.sh:



( ./foo.sh ; ./bar.sh ) | ./consumer


This lucky guess gave me a syntax error: 



( ./foo.sh & ; ./bar.sh & ) | ./consumer




This question already has an answer here:



  • combine output from two commands in bash

    5 answers






pipe io-redirection background-process




pipe io-redirection background-process






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Aug 17 at 10:20

























asked Aug 17 at 10:02









oh.dae.su

171118




171118




marked as duplicate by Community♦ Aug 17 at 10:37


This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.






marked as duplicate by Community♦ Aug 17 at 10:37


This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.









  • 1




    Did answer 1's command1 & command2; | ... not work for you?
    – Michael Homer
    Aug 17 at 10:10










  • To me it seemed it was only piping the output of command1 but never starting command2, as command1 will run indefinitely.
    – oh.dae.su
    Aug 17 at 10:12










  • How did it seem that way? It doesn't do that, but that's not to say there wasn't some other issue that's your real problem.
    – Michael Homer
    Aug 17 at 10:14










  • ok sorry for the wording. It only pipes the Output of command1, command2 is never started. If I reverse them, I get it the other way around.
    – oh.dae.su
    Aug 17 at 10:17






  • 1




    Yeah, exactly, that's not how it works, so you do have a different problem. command1 runs in the background and command2 starts shortly after. Try yes y & yes n ; | cat and see. You may need to provide your actual commands for someone to help you.
    – Michael Homer
    Aug 17 at 10:19













  • 1




    Did answer 1's command1 & command2; | ... not work for you?
    – Michael Homer
    Aug 17 at 10:10










  • To me it seemed it was only piping the output of command1 but never starting command2, as command1 will run indefinitely.
    – oh.dae.su
    Aug 17 at 10:12










  • How did it seem that way? It doesn't do that, but that's not to say there wasn't some other issue that's your real problem.
    – Michael Homer
    Aug 17 at 10:14










  • ok sorry for the wording. It only pipes the Output of command1, command2 is never started. If I reverse them, I get it the other way around.
    – oh.dae.su
    Aug 17 at 10:17






  • 1




    Yeah, exactly, that's not how it works, so you do have a different problem. command1 runs in the background and command2 starts shortly after. Try yes y & yes n ; | cat and see. You may need to provide your actual commands for someone to help you.
    – Michael Homer
    Aug 17 at 10:19








1




1




Did answer 1's command1 & command2; | ... not work for you?
– Michael Homer
Aug 17 at 10:10




Did answer 1's command1 & command2; | ... not work for you?
– Michael Homer
Aug 17 at 10:10












To me it seemed it was only piping the output of command1 but never starting command2, as command1 will run indefinitely.
– oh.dae.su
Aug 17 at 10:12




To me it seemed it was only piping the output of command1 but never starting command2, as command1 will run indefinitely.
– oh.dae.su
Aug 17 at 10:12












How did it seem that way? It doesn't do that, but that's not to say there wasn't some other issue that's your real problem.
– Michael Homer
Aug 17 at 10:14




How did it seem that way? It doesn't do that, but that's not to say there wasn't some other issue that's your real problem.
– Michael Homer
Aug 17 at 10:14












ok sorry for the wording. It only pipes the Output of command1, command2 is never started. If I reverse them, I get it the other way around.
– oh.dae.su
Aug 17 at 10:17




ok sorry for the wording. It only pipes the Output of command1, command2 is never started. If I reverse them, I get it the other way around.
– oh.dae.su
Aug 17 at 10:17




1




1




Yeah, exactly, that's not how it works, so you do have a different problem. command1 runs in the background and command2 starts shortly after. Try yes y & yes n ; | cat and see. You may need to provide your actual commands for someone to help you.
– Michael Homer
Aug 17 at 10:19





Yeah, exactly, that's not how it works, so you do have a different problem. command1 runs in the background and command2 starts shortly after. Try yes y & yes n ; | cat and see. You may need to provide your actual commands for someone to help you.
– Michael Homer
Aug 17 at 10:19











1 Answer
1






active

oldest

votes

















up vote
1
down vote



accepted










Remove the semicolon from your lucky guess...






share|improve this answer



























    1 Answer
    1






    active

    oldest

    votes








    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes








    up vote
    1
    down vote



    accepted










    Remove the semicolon from your lucky guess...






    share|improve this answer
























      up vote
      1
      down vote



      accepted










      Remove the semicolon from your lucky guess...






      share|improve this answer






















        up vote
        1
        down vote



        accepted







        up vote
        1
        down vote



        accepted






        Remove the semicolon from your lucky guess...






        share|improve this answer












        Remove the semicolon from your lucky guess...







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Aug 17 at 10:28









        RudiC

        1,2167




        1,2167












            -

            Popular posts from this blog

            How to check contact read email or not when send email to Individual?

            Image
            Clash Royale CLAN TAG #URR8PPP up vote 1 down vote favorite I'm using WordPress 4.9.8, CiviCRM to 5.5.1, I usually send email to contact by Search> Find contacts View contact details Action> Send email Send email ok, Contact received mail ok like picture But status only Email sent though contact read email or not. So, can CiviCRM can change status to Email read when contact read email? wordpress email share | improve this question asked Sep 26 at 0:12 ToanLuong 49 9 add a comment  |  up vote 1 down vote favorite I'm using WordPress 4.9.8, CiviCRM to 5.5.1, I usually send email to contact by Search> Find contacts View contact details Action> Send email Send email ok, Contact received mail ok like picture But status only Email sent though contact read email or not. So, can CiviCRM can change status to Email read when contact read email? wordpress email share | improve this question asked Se
            Read more

            Bahrain

            Image
            For other uses, see Bahrain (disambiguation). Sovereign island state in the Persian Gulf Kingdom of Bahrain مملكة البحرين   (Arabic) Mamlakat al-Baḥrayn Flag Coat of arms Anthem:  نشيد البحرين الوطني Bahrainona Our Bahrain Location of   Bahrain    (circled in red) Capital and largest city Manama 26°13′N 50°35′E  /  26.217°N 50.583°E  / 26.217; 50.583 Official languages Arabic Ethnic groups (2010 [1] ) 50.7% Arab (46% Bahrani, 4.7% other Arabs) 45.5% Asian 1% European 1.2% Others Religion Islam Demonym(s) Bahraini Government Unitary constitutional monarchy • King Hamad bin Isa Al Khalifa • Crown Prince Salman bin Hamad bin Isa Al Khalifa • Prime Minister Khalifa bin Salman Al Khalifa Legislature National Assembly • Upper house Consultative Council • Lower house Council of Representatives Independence • Declared Independence [2] 14 August 1971 • from United Kingdom [1] 15 August 1971 • Admitted to the United Nations 21 September 1971 • Kingdom of Bahrain 14 February 2002
            Read more

            Postfix configuration issue with fips on centos 7; mailgun relay

            Image
            Clash Royale CLAN TAG #URR8PPP up vote 0 down vote favorite I am trying to setup postfix to relay all mail generated on the local machine via SMTP to a mailgun relay. I have used the mailgun relay before with success on an ubuntu server, but I am migrating to a Centos 7 server which I will be running in FIPS mode. There error log is below, slightly sanitized. I have a small enough network that I choose to have each machine reach out to mailgun individually (this the loopback-only, 127.0.0.0/8 restrictions) and no firewall open port allowing smtp in to the machine. I assume the FIPS mode (and with it disabling of MD5) is causing problems, but I don't know how to overcome it or if it is even possible for tls_fprint to use some supported hash such as sha256 or sha512. However, the relay=none is slightly concerning since I have relayhost set, but perhaps that is because the smtp process is failing? Any help would be appreciated! postconf -n: alias_database = hash:/etc/alia
            Read more