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RC(8)                       System Manager's Manual                      RC(8)



NAME
       rc, rc.boot, rc.local - command scripts for auto-reboot and daemons

SYNOPSIS
       /etc/rc

       /etc/rc.boot

       /etc/rc.local

DESCRIPTION
       rc  and rc.boot are command scripts that are invoked by init(8) to per-
       form file system housekeeping and to start system daemons.  rc.local is
       a  script  for  commands  that are pertinent only to a specific site or
       client machine.

       rc.boot sets the machine name and, if on SunOS 4.1.1 Rev  B  or  later,
       invokes  ifconfig,  which  uses RARP to obtain the machine's IP address
       from the NIS network.  Then a "whoami" bootparams request  is  used  to
       retrieve  the  system's  hostname,  NIS domain name and default router.
       The ifconfig and hostconfig programs  set  the  system's  hostname,  IP
       address, NIS domain name, and default router in the kernel.

       If coming up multi-user, rc.boot runs fsck(8) with the -p option.  This
       "preens" the disks of minor inconsistencies  resulting  from  the  last
       system  shutdown and checks for serious inconsistencies caused by hard-
       ware or software failure.  If fsck(8) detects a serious  disk  problem,
       it  returns  an  error  and init(8) brings the system up in single-user
       mode.  When coming up single-user, when init(8)  is  invoked  by  fast-
       boot(8), or when it is passed the -b flag from boot(8S), functions per-
       formed in the rc.local file, including this disk check, are skipped.

       Next, rc runs.  If the system came up single-user,  rc  runs  when  the
       single-user  shell terminates (see init(8)).  It mounts 4.2 filesystems
       and spawns a shell for /etc/rc.local,  which  mounts  NFS  filesystems,
       runs  sysIDtool  (if on SunOS 4.1.1 Rev B or later) to set the system's
       configuration information into local configuration  files,  and  starts
       local  daemons.   After  rc.local  returns, rc starts standard daemons,
       preserves editor files,  clears  /tmp,  starts  system  accounting  (if
       applicable),  starts  the  network  (where applicable), and if enabled,
       runs savecore(8) to preserve the core image after a crash.

Sun386i
       These files operate as described above with the following variations:

       fsck(8) is invoked with the -y option to prevent  users  being  put  in
       single-user mode by happenstance.

       rc.boot  invokes  netconfig(8C) to configure the system for the network
       before booting.  netconfig is invoked before  the  /usr  filesystem  is
       mounted, because /usr might be mounted from a server.  netconfig writes
       /etc/net.conf unless the -n option  is  specified,  controlling  system
       booting.

       rc.boot dynamically loads device drivers.

       rc  invokes  any  programs found in /var/recover to clean up any opera-
       tions partially completed when the system crashed or was shut down.

       rc.local starts the automounter.

       The file /etc/net.conf stores these environment variables: The  VERBOSE
       environment variable controls the verbosity of the messages from the rc
       script; its value is taken from NVRAM.  The NETWORKED environment vari-
       able  controls  whether  services useful only on a networked system are
       started in /etc/rc.local.  The PNP environment variable, set up  during
       initial  system installation, controls whether local network configura-
       tion information is used or whether that  information  comes  from  the
       network.   (Using  automatic  system  installation  causes  all systems
       except boot servers to get this information from the  network,  facili-
       tating  network reconfiguration.)  The HOSTNAME and DOMAINNAME environ-
       ment variables, used together, help determine if this system is a  boot
       server or, with PNP set to no, control the host name and domain name.

FILES
       /etc/rc
       /etc/rc.boot
       /etc/rc.local
       /etc/net.conf
       /var/recover/*
       /var/yp/*
       /tmp

SEE ALSO
       automount(8),   boot(8S),   fastboot(8),  hostconfig(8),  ifconfig(8C),
       init(8), reboot(8), savecore(8), netconfig(8C)

BUGS
       The system message file /var/adm/messages is no longer created automat-
       ically.



                               14 December 1990                          RC(8)