Service Access Facility Administration (Reference)

This chapter includes reference information for administration of the Service Access Facility.

Files Associated With the SAF

The SAF uses configuration files that can be modified by using the sacadm and pmadm commands. You should not need to manually edit the configuration files.

File Name	Description
/etc/saf/_sysconfig	Per-system configuration script.
/etc/saf/_sactab	The SAC's administrative file that contains configuration data for the port monitors that the SAC controls
/etc/saf/pmtag	Home directory for port monitor pmtag
/etc/saf/pmtag/_config	Per-port monitor configuration script for port monitor pmtag if it exists
/etc/saf/pmtag/_pmtab	Port monitor pmtag's administrative file that contains port monitor-specific configuration data for the services pmtag provides
/etc/saf/pmtag/svctag	Per-service configuration script for service svctag
/var/saf/log	The SAC's log file
/var/saf/pmtag	Directory for files created by pmtag, for example, log files

/etc/saf/_sactab File

The information in the /etc/saf/_sactab file is as follows:

# VERSION=1
zsmon:ttymon::0:/usr/lib/saf/ttymon
#

# VERSION=1

Indicates the Service Access Facility version number.

zsmon

Is the name of the port monitor.

ttymon

Is the type of port monitor.

::

Indicates whether the following two flags are set:

• d — Do not enable the port monitor.

• x — Do not start the port monitor. No flags are set in this example.

0

Indicates the return code value. A return count of 0 indicates that the port monitor is not be restarted if the port monitor fails.

/usr/lib/saf/ttymon

Indicates the port monitor path name.

/etc/saf/pmtab/_pmtab File

The /etc/saf/pmtab/_pmtab file, such as /etc/saf/zsmon/_pmtab, is similar to the following:

# VERSION=1
ttya:u:root:reserved:reserved:reserved:/dev/term/a:I::/usr/bin/login::9600:
ldterm,ttcompat:ttya login\: ::tvi925:y:# 

# VERSION=1

Indicates the Service Access Facility version number.

ttya

Indicates the service tag.

x,u

Identifies whether the following flags are set:

• x — Do not enable the service.

• u — Create a utmpx entry for the service.

root

Indicates the identity assigned to the service tag.

reserved

This field is reserved for future use.

reserved

This field is reserved for future use.

reserved

This field is reserved for future use.

/dev/term/a

Indicates the TTY port path name.

/usr/bin/login

Identifies the full path name of the service to be invoked when a connection is received.

:c,b,h,I,r:

Indicates whether the following flags are set:

c — Sets the connect on carrier flag for the port.

b — Sets the port as bidirectional, allowing both incoming and outgoing traffic.

h — Suppresses an automatic hangup immediately after an incoming call is received.

I — Initializes the port.

r — Forces ttymon to wait until it receives a character from the port before ttymon prints the login: message.

9600

Identifies the TTY label defined in the /etc/ttydefs file.

ldterm,ttcompat

Identifies the STREAMS modules to be pushed.

ttya login\:

Identifies the prompt to be displayed.

:y/n:

Indicates yes or no response.

message

Identifies any inactive (disabled) response message.

tvi925

Identifies the terminal type.

y

Indicates whether the software carrier is set (y/n).

Service States

The sacadm command controls the states of services. The following table describes the possible states of services.

State	Description
Enabled	Default state – When the port monitor is added, the service operates.
Disabled	Default state – When the port monitor is removed, the service stops.

To determine the state of any particular service, use the following:

# pmadm -l -p portmon-name -ssvctag

Port Monitor States

The sacadm command controls the states of the ttymon and listen port monitors. The following table describes the possible port monitor states.

State	Description
Started	Default state – When the port monitor is added, it is automatically started.
Enabled	Default state – When the port monitor is added, it is automatically ready to accept requests for service.
Stopped	Default state – When the port monitor is removed, it is automatically stopped.
Disabled	Default state – When the port monitor is removed, it automatically continues existing services and refuses to add new services.
Starting	Intermediate state – The port monitor is in the process of starting.
Stopping	Intermediate state – The port monitor has been manually terminated, but it has not completed its shutdown procedure. The port monitor is on the way to becoming stopped.
Notrunning	Inactive state – The port monitor has been killed. All ports previously monitored are inaccessible. An external user cannot tell whether a port is disabled or notrunning.
Failed	Inactive state – The port monitor is unable to start and remain running.

To determine the state of any particular port monitor, use the following command:

# sacadm -l -p portmon-name

Port States

Ports can be enabled or disabled depending on the state of the port monitor that controls the ports.

State	Description
Serial (ttymon) port states
Enabled	The ttymon port monitor sends a prompt message to the port and provides login service to it.
Disabled	Default state of all ports if ttymon is killed or disabled. If you specify this state, ttymon sends out the disabled message when it receives a connection request.