CHAPTER 17 Service Access Facility

17.3 Service Access Controller

1. The sac program is started by init when entering run level 2 through an entry in /etc/inittab,

When sac is invoked it reads the configuration script /etc/saf/_sysconfig to customize it's environment.

After interpreting the _sysconfig file sac reads it's administrative file, /etc/saf/_sactab, which specifies the port monitors to start.

For each port monitor sac starts it forks a child process.

Each child process then interprets its specific port monitor configuration script, /etc/saf/<pmtag>/_config. Lastly the child process execs the port monitor specified by the _sactab entry.