With Service Management Facility (SMF) you can provide service management like rebooting, shutdown, refreshing with the service configuration. SMF also facilitates service dependencies like service A and service B are depended to each other which need to be in a proper managed order to start up.
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bash-3.2# who -r #current run level
. run-level 3 Feb 15 00:03 3 0 S
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SMF utilities
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svcs – lists services and provide additional info like man pages.
svcadm – mostly shows service status , permits interaction with services and including state transitions
svccfg – permits interaction with service config database.
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bash-3.2# svcs
bash-3.2# svcs -a | less
STATE STIME FMRI
legacy_run Feb_15 lrc:/etc/rcS_d/S50sk98sol
legacy_run Feb_15 lrc:/etc/rc2_d/S81dodatadm_udaplt
legacy_run Feb_15 lrc:/etc/rc2_d/S89PRESERVE
legacy_run Feb_15 lrc:/etc/rc2_d/S94ncalogd
legacy_run Feb_15 lrc:/etc/rc2_d/S98deallocate
legacy_run Feb_15 lrc:/etc/rc3_d/S16boot_server
legacy_run Feb_15 lrc:/etc/rc3_d/S50apache
legacy_run Feb_15 lrc:/etc/rc3_d/S80mipagent
legacy_run Feb_15 lrc:/etc/rc2_d/S05vmware-tools
bash-3.2# cd /etc/rc0.d/
bash-3.2# ls -ltr
total 28
-rwxr–r– 4 root sys 1151 Jan 10 2005 K62lu
-rwxr–r– 5 root sys 2329 Jan 22 2005 K34ncalogd
-rwxr–r– 6 root sys 344 Jan 22 2005 K06mipagent
-rwxr–r– 5 root sys 1718 Jan 22 2005 K50pppd
-rwxr–r– 6 root sys 474 Jan 22 2005 K27boot.server
-rwxr–r– 5 root sys 359 Jan 22 2005 K52llc2
-rwxr–r– 6 root sys 2452 Jun 23 2010 K16apache
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While using the commands you will notice service starting with K gets killed after work is over.
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bash-3.2# ps -ef | grep startd
root 9 1 0 Feb 15 ? 0:04 /lib/svc/bin/svc.startd
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You will notice the PID of svc.startd is 9, and svc.startd is also called service restarter manager.
The inetd Restarter – This service states manages the responses to administrative requests, system and services failures.
control inetd services. INETD is a super server which proxies connections to servers.
inetadm – is the default, delegated service restarter for INETD deamons
FMRI’s provide categories services like network and milestones
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bash-3.2# svcs -d svc:/network/smtp:sendmail #this command or svcs -d shows the dependencies needed to run the program. Returns required services for FMRI.
STATE STIME FMRI
online Feb_15 svc:/milestone/name-services:default
online Feb_15 svc:/system/identity:domain
online Feb_15 svc:/network/service:default
online Feb_15 svc:/system/filesystem/local:default
online Feb_15 svc:/system/filesystem/autofs:default
online Feb_15 svc:/system/system-log:default
bash-3.2# svcs -D svc:/network/smtp:sendmail #svcs -D (with uppercase) returns services dependent on sendmail.
STATE STIME FMRI
online Feb_15 svc:/milestone/multi-user:default
bash-3.2# svcs -l svc:/network/smtp:sendmail #return verbose dependency
fmri svc:/network/smtp:sendmail
name sendmail SMTP mail transfer agent
enabled true
state online
next_state none
state_time Sat Feb 15 00:03:59 2014
logfile /var/svc/log/network-smtp:sendmail.log
restarter svc:/system/svc/restarter:default
contract_id 69
dependency require_all/refresh file://localhost/etc/mail/sendmail.cf (online)
dependency require_all/refresh file://localhost/etc/nsswitch.conf (online)
dependency optional_all/none svc:/system/filesystem/autofs (online)
dependency require_all/none svc:/system/filesystem/local (online)
dependency require_all/none svc:/network/service (online)
dependency require_all/refresh svc:/milestone/name-services (online)
dependency optional_all/refresh svc:/system/identity:domain (online)
dependency optional_all/none svc:/system/system-log (online)
bash-3.2# svcs -l smtp #FMRI can be referenced by their unique parts.
bash-3.2# svcs -a | grep -i network #shows all the network services.
bash-3.2# svcs -a | wc -l #checks the total services running
219
bash-3.2# svcs -a | grep smtp #loads only one instance
online Mar_13 svc:/network/smtp:sendmail
To check the SMF’s default log file location is /var/svc/log/close to that FMRI.log
bash-3.2# cd /var/svc/log #checking the log files
bash-3.2# ls -ltr
bash-3.2# ls -ltr | grep -i mile
bash-3.2# ls -ltr | grep -i send
bash-3.2# less network-smtp\:sendmail.log
bash-3.2# ps -ef | grep -i send #searches the services
root 1063 1 0 Mar 13 ? 0:01 /usr/lib/sendmail -bl -q15m
smmsp 1062 1 0 Mar 13 ? 0:01 /usr/lib/sendmail -Ac -q15m
bash-3.2# ps -ef | grep -i send
bash-3.2# !svcs
bash-3.2# svcs -l smtp
bash-3.2# ps -ef |grep -i sendmail
bash-3.2# svcs –help #gives the possibilities with svcs
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