www.nico.schottelius.org/software/cinit/browse_source/cinit-0.3pre8/doc/user/daemons.backgrounding.text
Nico Schottelius 423ba10303 import cinit from unix.schottelius.org
Signed-off-by: Nico Schottelius <nico@ikn.schottelius.org>
2009-09-16 12:53:45 +02:00

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cinit - Daemons backgrounding
=============================
Nico Schottelius <nico-cinit==@==schottelius.org>
0.1, for cinit 0.3, Initial versinon from 2005-06-12
This document describes the backgrounding process and how to disable it.
Definition
-----------
A daemon is a program which runs in the background.
Running in the background means you cannot access the process
directly (like you can press a key in a shell).
Daemons and cinit
------------------
cinit normally watches system services and restarts them
(`respawn` flag in the configuration). If the process goes to background,
cinit cannot control it directly anymore.
List of daemons and non-forking parameters
-------------------------------------------
The following daemons / servers are known to avoid backgrounding easily:
- acpid [x86 power management]: -f (undocumentated but works)
- apache [webserver]: -DFOREGROUND
- asterisk [pbx]: -f
- bind [dns server/caching]: -f
- cardmgr [pcmcia/cardbus]: -f
- cron (vixie) [schedular]: -f
- cupsd [printer server]: -f or -F
- dhclient [dhcp client]: -d
- dhcp3 (isc) [dhcp server]: -f
- distccd [compile server]: normal behaviour
- fam [file alteration monitor]:-f
- fcron [schedular]: -f
- frox [ftp proxy]: "NoDetach" in config
- freeradius [radiusd]: -f
- gdm [display manager]: -nodaemon
- hybrid [irc server]: -foreground
- icecast2 [sound streamer]: normal behaviour
- mini-lpd [printer server]: normal behaviour
- metalog [log server]: normal behaviour
- monotone [vcs]: normal behaviour
- mpd [music server]: --no-daemon
- nessusd ["security server"]: normal behaviour
- ntpd [time server]: -n
- nylon [socks proxy]: -f (prints output to terminal)
- oidentd [identd server]: -i
- oops [http proxy]: normal behaviour
- openpbx [pbx]: -f
- openssh [ssh server]: -D
- openvpn [vpn server]: normal behaviour
- pbbuttonsd [power management]:normal behaviour
- portmap [portmapper]: -f
- proftpd [ftp server]: -n
- qmail [mta]: normal behaviour
- rsync ["file server"]: --no-detach
- silcd ["secure chat server"]: -F, --foreground
- slapd [ldap]: -d
- snmpd [snmp daemon]: -f
- stunnel [ssl wrapper]: "foreground = yes" in config
- svnserve [vcs]: --foreground
- syslogd [log server]: -n
- syslog-ng [log server]: -F
- tcpserver [super server]: normal behaviour
- udhcpc [dhcp client]: normal behaviour
- vsftpd [ftp server]: normal behaviour (or: config: background=no)
- xinetd [super server]: -dontfork
Problematic daemons
-------------------
Those are the daemons that do not offer the possibility (as of release 0.2):
- atd (no switch, no configuraton option)
- inetd (some variants)
- nscd (no switch, no configuraton option)