Difference between process in background and daemon

Question

What is technically the difference of a process that started in foreground and was manually put into background and a daemon? Do they have different properties?

Related Question: http://unix.stackexchange.com/questions/56495/whats-the-difference-between-running-a-program-as-a-daemon-and-forking-it-into?rq=1 — Karlson, Nov 22 '13 at 16:03

score 5 · Accepted Answer · answered Nov 22 '13 at 16:16

5

You can take a look at the definition of a Daemon, which tells you what the properties of a daemon are, so biggest ones are:

No Controlling Terminal - STDIN, STDOUT, STDERR associated with starting terminal are redirected.
Parent Process is set to init
Daemon is a Process Group Leader.

answered Nov 22 '13 at 16:16

Karlson

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So daemons need not have their own sessions, per se? – jiggunjer Sep 09 '16 at 13:01
@jiggunjer You mean a user interactive session? – Karlson Sep 09 '16 at 13:52
I thought every process had a SID, a session ID, `ps` displays it. – jiggunjer Sep 09 '16 at 13:56
@jiggunjer What are you talking about? – Karlson Sep 09 '16 at 14:02
A process is part of a session, yes? – jiggunjer Sep 09 '16 at 16:09
@jiggunjer Can you defined what you mean by session? – Karlson Sep 09 '16 at 16:20

Difference between process in background and daemon

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