[systemd-devel] if StandardInput is set, echo messages from script doesn't show up on terminal.

[Navneet Sinha]

I have systemd service, say foo.service.

*Service file*

  [Unit]
  Description=Foo agent.
  After=fooAfter.service
  Before=fooBefore1.service
  Before=fooBefore2.service

  [Service]
  # During boot the foo.sh script reads input from /dev/console.  If the
user
  # hits <ESC>, it will skip waiting for foo and foo2 to startup.
  Type=oneshot
  StandardInput=tty
  StandardOutput=tty
  ExecStart=/usr/bin/foo.sh start

  RemainAfterExit=True
  ExecStop=/usr/bin/foo.sh stop

  [Install]
  WantedBy=multi-user.target


*start function from foo.sh*

start() {

    echo -n "This is a fake systemd service"
    success
    echo
    exit 0
}

During boot up this service file is being executed
Following is what I am seeing :

"2016-01-14 20:24:39.693603 11760 pexpect              2 c:abc3#1 received:*
'This is a fake s'*

Instead I expected *"This is a fake systemd service"* and in next line *"[
OK ]"*

*systemd version *is :  systemd-201-2.fc18.9.i686

*systemd configuration* for the system, I am using is :

systemd.default_standard_output=tty
systemd.show_status=0


On further debugging, what I see if I add just a "sleep 1" after echo.
Missing echo Messages starts showing up during boot up OR if I remove
"StandardInput" attribute from the service file.

So, the issue I am suspecting has something to do with this process
becoming the controlling process for the terminal( as StandardInput is set
).

*start function from foo.sh after adding "sleep 1"*

start() {

    echo -n "This is a fake systemd service"
    success
    echo
    *sleep 1*
    exit 0
}

Can somebody explain this  and also suggest a better solution, if there is.

Thanks
Navneet
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