AT&T System V service management was documented, somewhat succinctly, in the rc0, rc2, and rc6 manual pages.

rc0 documents the shutdown sequence:

• run files starting with K in /etc/rc0.d, in ASCII order;
• send SIGTERM to all still-running processes other than rc0 and processes 0 and 1;
• send SIGKILL to all still-running processes other than rc0 and processes 0 and 1;
• unmount all file systems other than /.

rc2 documents the multi-user startup sequence:

• run files in /etc/rc.d, in ASCII order;
• run files starting with S in /etc/rc2.d, in ASCII order.

rc6 documents the reboot sequence:

• build a new kernel if necessary;
• unmount all filesystems.

These manual pages also document how init takes care of the rest of the process, following the actions set up in /etc/inittab.

AT&T System V service management was documented, somewhat succinctly, in the rc0, rc2, and rc6 manual pages.

rc0 documents the shutdown sequence:

• run files starting with K in /etc/rc0.d, in ASCII order;
• send SIGTERM to all still-running processes other than rc0 and processes 0 and 1;
• send SIGKILL to all still-running processes other than rc0 and processes 0 and 1;
• unmount all file systems other than /.

rc2 documents the multi-user startup sequence:

• run files in /etc/rc.d, in ASCII order;
• run files starting with S in /etc/rc2.d, in ASCII order.

rc6 documents the reboot sequence:

• build a new kernel if necessary;
• unmount all filesystems.

These manual pages also document how init takes care of the rest of the process, following the actions set up in /etc/inittab; init is also documented in its own manual page.