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svrctl(2)                     System Calls Manual                    svrctl(2)

NAME
       svrctl - special server control functions

SYNOPSIS
       #include <sys/svrctl.h>

       int svrctl(u32_t request, void *data);

DESCRIPTION
       Svrctl  implements  some  very MINIX 3 specific system calls that don't
       deserve their own system call number.

       This system call makes it easy to add new ways of setting  and  getting
       system parameters, but at the same time, backwards compatibility is not
       guaranteed.  Read the <sys/svrctl.h>  include  file  to  see  what  the
       structures mentioned below look like.  Most calls are root-only, unless
       specified otherwise.

       The only way to know how to properly use these calls is  to  study  the
       associated server code, or the programs that already use these calls.

       Current requests are:

       MMGETPARAM
            Request  the  value of one or all boot parameters.  Can be used by
            non-root.

       MMSETPARAM
            Set an override for a value of a boot parameter.  Can be  used  by
            non-root.

RETURN VALUES
       Svrctl returns 0 upon success and -1 upon failure.

AUTHOR
       Philip Homburg <philip@cs.vu.nl>

                                                                     svrctl(2)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | AUTHOR