request for clarification of console stanza

Asked by Kevin Shelton on 2007-06-04

Is there further documentation of the difference between "console output" and "console owner"? I am unable to parse "as output and Control-C also sent the process" in the following context:

from http://upstart.ubuntu.com/getting-started.html

console

You can change the settings for where a job's output goes, and where its input comes from, with the console stanza. This should be one of output (input and output from /dev/console), owner (as output and Control-C also sent the process) or none (the default; input and output to /dev/null).

What I am trying to achieve: understand VTs and upstart enough to write an interactive startup script.

Question information

Language:
English Edit question
Status:
Solved
For:
upstart Edit question
Assignee:
No assignee Edit question
Solved by:
Scott James Remnant (Canonical)
Solved:
2007-06-04
Last query:
2007-06-04
Last reply:
2007-06-04

The console stanza defines what file descriptor the standard input, output and error file descriptors are bound to, and any special properties of that file descriptor.

  "none" means that all three are bound to /dev/null
  "output" means that all three are bound to /dev/console
  "owner" means that all three are bound to /dev/console AND the TIOCSCTTY ioctl() is called on it; making the console the "controlling tty" for the process - and as such it receives tty events such as Control-C and will be hung-up if another process takes the controlling tty.

Kevin Shelton (kmshelton) said : #2

Thanks Scott James Remnant, that solved my question.