Putting a foreground process into the background from a background process

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











up vote
0
down vote

favorite












The title is basically my question. Is it possible to put a process into the background from another background process with bash?



For instance, if we have the following code:



function check_if_server_running 
 while [ server_running -ne true ]
 curl localhost:8000
 done
 bg %-


check_if_server_running &
./startServer

# Some other code...


Could we replace bg %- with something to make the ./startServer run in the background once it's up? Normally bg %- makes puts the last process in the background but it is not working for me






bash






share







New contributor




User_KS is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.























    up vote
    0
    down vote

    favorite












    The title is basically my question. Is it possible to put a process into the background from another background process with bash?



    For instance, if we have the following code:



    function check_if_server_running 
     while [ server_running -ne true ]
     curl localhost:8000
     done
     bg %-


    check_if_server_running &
    ./startServer

    # Some other code...


    Could we replace bg %- with something to make the ./startServer run in the background once it's up? Normally bg %- makes puts the last process in the background but it is not working for me






    bash






    share







    New contributor




    User_KS is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.





















      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      The title is basically my question. Is it possible to put a process into the background from another background process with bash?



      For instance, if we have the following code:



      function check_if_server_running 
       while [ server_running -ne true ]
       curl localhost:8000
       done
       bg %-


      check_if_server_running &
      ./startServer

      # Some other code...


      Could we replace bg %- with something to make the ./startServer run in the background once it's up? Normally bg %- makes puts the last process in the background but it is not working for me






      bash






      share







      New contributor




      User_KS is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      The title is basically my question. Is it possible to put a process into the background from another background process with bash?



      For instance, if we have the following code:



      function check_if_server_running 
       while [ server_running -ne true ]
       curl localhost:8000
       done
       bg %-


      check_if_server_running &
      ./startServer

      # Some other code...


      Could we replace bg %- with something to make the ./startServer run in the background once it's up? Normally bg %- makes puts the last process in the background but it is not working for me






      bash




      bash





      share







      New contributor




      User_KS is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.










      share







      New contributor




      User_KS is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.








      share



      share






      New contributor




      User_KS is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      asked 4 mins ago









      User_KS

      1




      1




      New contributor




      User_KS is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.





      New contributor





      User_KS is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






      User_KS is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.

























          active

          oldest

          votes











          Your Answer







          StackExchange.ready(function()
          var channelOptions =
          tags: "".split(" "),
          id: "106"
          ;
          initTagRenderer("".split(" "), "".split(" "), channelOptions);

          StackExchange.using("externalEditor", function()
          // Have to fire editor after snippets, if snippets enabled
          if (StackExchange.settings.snippets.snippetsEnabled)
          StackExchange.using("snippets", function()
          createEditor();
          );

          else
          createEditor();

          );

          function createEditor()
          StackExchange.prepareEditor(
          heartbeatType: 'answer',
          convertImagesToLinks: false,
          noModals: false,
          showLowRepImageUploadWarning: true,
          reputationToPostImages: null,
          bindNavPrevention: true,
          postfix: "",
          onDemand: true,
          discardSelector: ".discard-answer"
          ,immediatelyShowMarkdownHelp:true
          );



          );






          User_KS is a new contributor. Be nice, and check out our Code of Conduct.









           

          draft saved


          draft discarded


















          StackExchange.ready(
          function ()
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f475706%2fputting-a-foreground-process-into-the-background-from-a-background-process%23new-answer', 'question_page');

          );

          Post as a guest






















          active

          oldest

          votes













          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes








          User_KS is a new contributor. Be nice, and check out our Code of Conduct.









           

          draft saved


          draft discarded


















          User_KS is a new contributor. Be nice, and check out our Code of Conduct.












          User_KS is a new contributor. Be nice, and check out our Code of Conduct.











          User_KS is a new contributor. Be nice, and check out our Code of Conduct.













           


          draft saved


          draft discarded














          StackExchange.ready(
          function ()
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f475706%2fputting-a-foreground-process-into-the-background-from-a-background-process%23new-answer', 'question_page');

          );

          Post as a guest
































































          -

          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 questi...
          Read more

          Displaying single band from multi-band raster using QGIS

          Image
          Clash Royale CLAN TAG #URR8PPP 1 How can I extract a single band from multi-band raster in QGIS? I have an remote sensed image which has 6 bands (including NDVI band), I want to display each band separately, but have no idea how to do. I have seen some questions similar here but none worked for me. The original image (has 6 bands) is: I want to display the band 6 which should be like this: But I tried gdal_translate, and couldn't get the correct result. What I have got is: qgis raster multi-band share | improve this question edited Mar 5 at 0:53 Summer asked Mar 4 at 6:42 Summer Summer 23 6 Is this any help gis.stackexchange.com/questions/220658/… ? if not gis.stackexchange.com/questions/62133/… might help. – Michael Stimson Mar 4 at 6:46 Thanks for answering but when I used gdal_translate, qgis showed that 'Error 4: Kayena.tif: No such file or directory". Would you know how to fi...
          Read more

          How many registers does an x86_64 CPU actually have?

          Image
          Clash Royale CLAN TAG #URR8PPP up vote 2 down vote favorite I am currently learning reverse engineering and am studying the flags register. I had in my mind that rflags was just another name for one of the 16 general purpose registers, for example rax or rbx . But it looks like rflags is actually an additional register. So that makes 17 registers in total... how many more could there be? I have spent at least an hour on this and found numerous different answers. The best answer so far is this, which says that there are 40 registers in total. 16 General Purpose Registers 2 Status Registers 6 Code Segment Registers 16 SSE Registers 8 FPU/MMX Registers But if I add that up, I get 48. Could anybody provide an official answer on how many registers an x86_64 CPU has (e.g. an Intel i7). Additionally, I have seen references to 'hardware' and 'architectural' registers. What are those registers and how many are there? register x86-64 share | improve this...
          Read more