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rc(8) [bsd man page]

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

rc - command script for auto-reboot and daemons SYNOPSIS
/etc/rc /etc/rc.local DESCRIPTION
Rc is the command script which controls the automatic reboot and rc.local is the script holding commands which are pertinent only to a spe- cific site. When an automatic reboot is in progress, rc is invoked with the argument autoboot and runs a fsck with option -p to ``preen'' all the disks of minor inconsistencies resulting from the last system shutdown and to check for serious inconsistencies caused by hardware or software failure. If this auto-check and repair succeeds, then the second part of rc is run. The second part of rc, which is run after a auto-reboot succeeds and also if rc is invoked when a single user shell terminates (see init(8)), starts all the daemons on the system, preserves editor files and clears the scratch directory /tmp. Rc.local is executed immedi- ately before any other commands after a successful fsck. Normally, the first commands placed in the rc.local file define the machine's name, using hostname(1), and save any possible core image that might have been generated as a result of a system crash, savecore(8). The latter command is included in the rc.local file because the directory in which core dumps are saved is usually site specific. SEE ALSO
init(8), reboot(8), savecore(8) BUGS
4th Berkeley Distribution April 27, 1985 RC(8)

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REBOOT(2)						      BSD System Calls Manual							 REBOOT(2)

reboot -- reboot system or halt processor SYNOPSIS
#include <unistd.h> #include <sys/reboot.h> int reboot(int howto); DESCRIPTION
Reboot() reboots the system. Only the super-user may reboot a machine on demand. However, a reboot is invoked automatically in the event of unrecoverable system failures. Howto is a mask of options; the system call interface allows the following options, defined in the include file <sys/reboot.h>, to be passed to the new kernel or the new bootstrap and init programs. RB_AUTOBOOT The default, causing the system to reboot in its usual fashion. RB_ASKNAME Interpreted by the bootstrap program itself, causing it to prompt on the console as to what file should be booted. Normally, the system is booted from the file ``xx(0,0)bsd'', where xx is the default disk name, without prompting for the file name. RB_DFLTROOT Use the compiled in root device. Normally, the system uses the device from which it was booted as the root device if possible. (The default behavior is dependent on the ability of the bootstrap program to determine the drive from which it was loaded, which is not possible on all systems.) RB_DUMP Dump kernel memory before rebooting; see savecore(8) for more information. RB_HALT the processor is simply halted; no reboot takes place. This option should be used with caution. RB_INITNAME An option allowing the specification of an init program (see init(8)) other than /sbin/init to be run when the system reboots. This switch is not currently available. RB_KDB Load the symbol table and enable a built-in debugger in the system. This option will have no useful function if the kernel is not configured for debugging. Several other options have different meaning if combined with this option, although their use may not be possible via the reboot() call. See kadb(4) for more information. RB_NOSYNC Normally, the disks are sync'd (see sync(8)) before the processor is halted or rebooted. This option may be useful if file system changes have been made manually or if the processor is on fire. RB_RDONLY Initially mount the root file system read-only. This is currently the default, and this option has been deprecated. RB_SINGLE Normally, the reboot procedure involves an automatic disk consistency check and then multi-user operations. RB_SINGLE prevents this, booting the system with a single-user shell on the console. RB_SINGLE is actually interpreted by the init(8) program in the newly booted system. When no options are given (i.e., RB_AUTOBOOT is used), the system is rebooted from file ``bsd'' in the root file system of unit 0 of a disk chosen in a processor specific way. An automatic consistency check of the disks is normally performed (see fsck(8)). RETURN VALUES
If successful, this call never returns. Otherwise, a -1 is returned and an error is returned in the global variable errno. ERRORS
[EPERM] The caller is not the super-user. SEE ALSO
kadb(4), crash(8), halt(8), init(8), reboot(8), savecore(8) BUGS
The HP300 implementation supports neither RB_DFLTROOT nor RB_KDB. HISTORY
The reboot() function call appeared in 4.0BSD. 4th Berkeley Distribution June 4, 1993 4th Berkeley Distribution
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