Following early initialization, the system must be placed in a particular system state. First, init scans each entry in the /etc/inittab file for the value initdefault in the third field (the ``action'' field). Including the value initdefault in the third field of an entry means the default system state is defined in the second field of that entry. For example, in the first line of ``System state 3 processes'', the 3 in the second field, followed by the value initdefault in the third field, means the default system state for this system is system state 3 (networking state).
Once init has identified the default system state as either system state 2 or system state 3, it searches the table for all entries that specify processes for the applicable system state. Typical system state 3 entries are shown in ``System state 3 processes''.
is:3:initdefault: onl:1234:wait:/sbin/psradm -n -a r2:23:wait:/sbin/rc2 > /dev/sysmsg 2>&1 </dev/console r3:3:wait:/sbin/rc3 > /dev/sysmsg 2>&1 </dev/console li:23:wait:/usr/bin/ln /dev/systty /dev/syscon >/dev/null 2>&1 sc:234:respawn:/usr/lib/saf/sac -t 300 co:12345:respawn:/usr/lib/saf/ttymon -g -p "Console Login: " -d /dev/console -l console d2:23:wait:/sbin/dinit >/dev/console 2>&1 </dev/console co:12345:once:/etc/mpchan >/dev/console 2>&1
System state 3 processes
The processes defined in these entries are executed before the system enters the networking system state during powerup or reboot. (See ``System state directories''.)
The second line shown in
``System state 3 processes''
script accomplishes (among other things) the following:
Next, init calls the rc3 script. The rc3 script starts NFS, mounts remote resources, and offers your resources automatically.
Then, init searches the /etc/inittab file for system state 3 processes and executes them in the order found in the file. In this example, init performs the following functions:
The system is now available for users to log on
as shown by the
prompt that appears on users' terminals.
completes initialization of processes
that can be delayed until after a
prompt is displayed (thus reducing
the amount of time a user has to wait
for the prompt).
contains the initialization scripts
for each of these processes.
When this is complete, the full networking environment is established and the system is in system state 3.