attach to tty running a process

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I have a systemd service file that runs a java program in another tty 



[Unit]
Description=java program
After=network-online.target

[Service]
Type=simple
ExecStart=/usr/bin/java -cp "/home/user/someclass.jar"
Restart=always
RestartSec=10
StandardInput=tty-force
StandardOutput=inherit
StandardError=inherit
TTYPath=/dev/tty10
TTYVTDisallocate=yes
TTYReset=yes
TTYVHangup=yes

[Install]
WantedBy=multi-user.target


The program waits for input in the tty, I can change to that tty by using Ctrl+Alt+F10 or using chvt 10 and I'm able to interact with the program.



Now I want to send input and get output from that tty without changing my current tty.
I tried using screen and all I get is a blank screen and. I tried using script which succeeded if I run bash in that tty but fails If i run a java program




gnu-screen java tty




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    up vote
    0
    down vote

    favorite












    I have a systemd service file that runs a java program in another tty 



    [Unit]
    Description=java program
    After=network-online.target

    [Service]
    Type=simple
    ExecStart=/usr/bin/java -cp "/home/user/someclass.jar"
    Restart=always
    RestartSec=10
    StandardInput=tty-force
    StandardOutput=inherit
    StandardError=inherit
    TTYPath=/dev/tty10
    TTYVTDisallocate=yes
    TTYReset=yes
    TTYVHangup=yes

    [Install]
    WantedBy=multi-user.target


    The program waits for input in the tty, I can change to that tty by using Ctrl+Alt+F10 or using chvt 10 and I'm able to interact with the program.



    Now I want to send input and get output from that tty without changing my current tty.
    I tried using screen and all I get is a blank screen and. I tried using script which succeeded if I run bash in that tty but fails If i run a java program




    gnu-screen java tty




    share|improve this question






















      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I have a systemd service file that runs a java program in another tty 



      [Unit]
      Description=java program
      After=network-online.target

      [Service]
      Type=simple
      ExecStart=/usr/bin/java -cp "/home/user/someclass.jar"
      Restart=always
      RestartSec=10
      StandardInput=tty-force
      StandardOutput=inherit
      StandardError=inherit
      TTYPath=/dev/tty10
      TTYVTDisallocate=yes
      TTYReset=yes
      TTYVHangup=yes

      [Install]
      WantedBy=multi-user.target


      The program waits for input in the tty, I can change to that tty by using Ctrl+Alt+F10 or using chvt 10 and I'm able to interact with the program.



      Now I want to send input and get output from that tty without changing my current tty.
      I tried using screen and all I get is a blank screen and. I tried using script which succeeded if I run bash in that tty but fails If i run a java program




      gnu-screen java tty




      share|improve this question












      I have a systemd service file that runs a java program in another tty 



      [Unit]
      Description=java program
      After=network-online.target

      [Service]
      Type=simple
      ExecStart=/usr/bin/java -cp "/home/user/someclass.jar"
      Restart=always
      RestartSec=10
      StandardInput=tty-force
      StandardOutput=inherit
      StandardError=inherit
      TTYPath=/dev/tty10
      TTYVTDisallocate=yes
      TTYReset=yes
      TTYVHangup=yes

      [Install]
      WantedBy=multi-user.target


      The program waits for input in the tty, I can change to that tty by using Ctrl+Alt+F10 or using chvt 10 and I'm able to interact with the program.



      Now I want to send input and get output from that tty without changing my current tty.
      I tried using screen and all I get is a blank screen and. I tried using script which succeeded if I run bash in that tty but fails If i run a java program





      gnu-screen java tty





      share|improve this question











      share|improve this question




      share|improve this question










      asked Mar 6 at 11:18









      MOHAMMAD RASIM

      586




      586




















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          The PTY feature of socat may be your best bet for interfacing terminal-heavy apps programmatically w/o any extra functionality. See the examples in the man page.



          Also, dtach provides screen-like (multi-way) reattachment semantics for easy access from a terminal emulator.






          share|improve this answer




















          • Can you provide an example of socat to run on /dev/tty10? Also looking at the man page of dtach I see no mention of dtach working with ttys, only sockets.
            – MOHAMMAD RASIM
            Mar 6 at 12:19










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          up vote
          0
          down vote













          The PTY feature of socat may be your best bet for interfacing terminal-heavy apps programmatically w/o any extra functionality. See the examples in the man page.



          Also, dtach provides screen-like (multi-way) reattachment semantics for easy access from a terminal emulator.






          share|improve this answer




















          • Can you provide an example of socat to run on /dev/tty10? Also looking at the man page of dtach I see no mention of dtach working with ttys, only sockets.
            – MOHAMMAD RASIM
            Mar 6 at 12:19














          up vote
          0
          down vote













          The PTY feature of socat may be your best bet for interfacing terminal-heavy apps programmatically w/o any extra functionality. See the examples in the man page.



          Also, dtach provides screen-like (multi-way) reattachment semantics for easy access from a terminal emulator.






          share|improve this answer




















          • Can you provide an example of socat to run on /dev/tty10? Also looking at the man page of dtach I see no mention of dtach working with ttys, only sockets.
            – MOHAMMAD RASIM
            Mar 6 at 12:19












          up vote
          0
          down vote










          up vote
          0
          down vote









          The PTY feature of socat may be your best bet for interfacing terminal-heavy apps programmatically w/o any extra functionality. See the examples in the man page.



          Also, dtach provides screen-like (multi-way) reattachment semantics for easy access from a terminal emulator.






          share|improve this answer












          The PTY feature of socat may be your best bet for interfacing terminal-heavy apps programmatically w/o any extra functionality. See the examples in the man page.



          Also, dtach provides screen-like (multi-way) reattachment semantics for easy access from a terminal emulator.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Mar 6 at 11:30









          L29Ah

          451112




          451112











          • Can you provide an example of socat to run on /dev/tty10? Also looking at the man page of dtach I see no mention of dtach working with ttys, only sockets.
            – MOHAMMAD RASIM
            Mar 6 at 12:19
















          • Can you provide an example of socat to run on /dev/tty10? Also looking at the man page of dtach I see no mention of dtach working with ttys, only sockets.
            – MOHAMMAD RASIM
            Mar 6 at 12:19















          Can you provide an example of socat to run on /dev/tty10? Also looking at the man page of dtach I see no mention of dtach working with ttys, only sockets.
          – MOHAMMAD RASIM
          Mar 6 at 12:19




          Can you provide an example of socat to run on /dev/tty10? Also looking at the man page of dtach I see no mention of dtach working with ttys, only sockets.
          – MOHAMMAD RASIM
          Mar 6 at 12:19












           

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