41 lines
1.1 KiB
Groff
41 lines
1.1 KiB
Groff
.\" svrctl.2
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.\"
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.\" Created: July, 1994 by Philip Homburg <philip@cs.vu.nl>
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.TH svrctl 2
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.SH NAME
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svrctl \- special server control functions
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.SH SYNOPSIS
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.nf
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.ft B
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#include <sys/svrctl.h>
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int svrctl(u32_t \fIrequest\fP, void *\fIdata\fP);
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.ft R
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.fi
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.SH DESCRIPTION
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.B Svrctl
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implements some very MINIX 3 specific system calls that don't deserve their own
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system call number.
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.PP
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This system call makes it easy to add new ways of setting and getting system
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parameters, but at the same time, backwards compatibility is not guaranteed.
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Read the <sys/svrctl.h> include file to see what the structures mentioned below
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look like. Most calls are root-only, unless specified otherwise.
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.PP
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The only way to know how to properly use these calls is to study the
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associated server code, or the programs that already use these
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calls.
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.PP
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Current requests are:
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.TP 5
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.B MMGETPARAM
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Request the value of one or all boot parameters. Can be used by non-root.
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.TP
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.B MMSETPARAM
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Set an override for a value of a boot parameter. Can be used by non-root.
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.SH "RETURN VALUES"
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.B Svrctl
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returns 0 upon success and -1 upon failure.
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.SH AUTHOR
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Philip Homburg <philip@cs.vu.nl>
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