www.nico.schottelius.org/software/cinit/browse_source/cinit-0.1/doc/daemons.backgrounding

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daemons backgrounding,
Nico Schottelius 2005-06-12 (Last Modified: 2005-06-12)
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0. Definition
A daemon is a program which runs in the background, not having a tty
associated necesserally. Running in background does not mean it has
to background (fork()) itself, but that you cannot control it directly
from a shell.
1. Daemons and cinit
Respawning daemons is a bit more difficult, as daemons do often fork()
(go to background, the calling process exits).
This way cinit cannot watch it directly.
The first solution is to check the documentation of your daemon program,
if it has a switch to disable forking
The following daemons / servers are known to avoid backgrounding easily:
bind [dns server/caching]: -f
cron (vixie) [schedular]: -f
cupsd [printer server]: -f or -F
dhcp3 (isc) [dhcp server]: -f
distccd [compile server]: normal behaviour
frox [ftp proxy]: "NoDetach" in config
mini-lpd [printer server]: normal behaviour
metalog [log server]: normal behaviour
monotone [vcs]: normal behaviour
nessusd ["security server"]: normal behaviour
ntpd [time server]: -n
oops [http proxy]: normal behaviour
openssh [ssh server]: -D
openvpn [vpn server]: normal behaviour
pbbuttonsd [power management]:normal behaviour
proftpd [ftp server]: -n
qmail [mta]: normal behaviour
rsync ["file server"]: --no-detach
slapd [ldap]: -d
snmpd [snmp daemon]: -f
svnserve [vcs]: --foreground
syslogd [log server]: -n
tcpserver [super server]: normal behaviour
vsftpd [ftp server]: normal behaviour (or: config: background=no)
xinetd [super server]: -dontfork
Those are the daemons that do not offer the possibility (as of release 0.0.8):
- apache (only with debug mode)
- atd (no switch, no configuraton option)
- inetd (some variants)
- nscd (no switch, no configuraton option)
- portmap (only with debug mode)