AT&T UNIX™PC Unix System V Users Manual - tenox

SYSLOCAL ( 2) SYSLOCAL ( 2)
NAME
Syslocal - local system calls
SYNOPSIS
#include
int syslocal (cmd [ , arg ] ... )
DESCRIPTION
Syslocal executes special AT&T UNIX PC system calls. Cmd is the
name of one of the system calls described below.
SYSL_REBOOT Reboots the system. You must be superuser
to execute. No additional arguments are
required.
SYSL_KADDR Returns certain kernel addresses or values.
This call is used by programs like ps ( 1) so
that they don't have to read the kernel symbol
table. The second argument is one of the
following:
SLA_ V returns address of V
SLA_PROC returns address of proc
table
SLA_TIME returns address of system
time
SLA_USRSTK returns top of user stack
SLA_USIGN returns signature, unique #
for each version
SLA_BLDDATE returns address of build
date string
SLA_BLDPWD returns address of build
directory string
SLA_MEM returns size of physical
memory
SLA_BDEVCNT returns maximum number
of block devices
SLA_CDEVCNT returns maximum number
of character devices
SYSL_LED Turns on/off user LED. The second argument
is either 0 for off or 1 for on.
The following two calls support the hardware real-time clock.
Their use requires the additional include file:
#include
SYSL_RDRTC Reads the real-time clock. The second argument
is a struct rtc * .
SYSL_WRTRTC Writes the real-time clock. The second argument
is a struct rtc * .
The following two calls support loadable device drivers. Their use
requires the additional include file:
#include
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