minix/lib/libc/gen/gethostname.3
Ben Gras 2fe8fb192f Full switch to clang/ELF. Drop ack. Simplify.
There is important information about booting non-ack images in
docs/UPDATING. ack/aout-format images can't be built any more, and
booting clang/ELF-format ones is a little different. Updating to the
new boot monitor is recommended.

Changes in this commit:

	. drop boot monitor -> allowing dropping ack support
	. facility to copy ELF boot files to /boot so that old boot monitor
	  can still boot fairly easily, see UPDATING
	. no more ack-format libraries -> single-case libraries
	. some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases
	. drop several ack toolchain commands, but not all support
	  commands (e.g. aal is gone but acksize is not yet).
	. a few libc files moved to netbsd libc dir
	. new /bin/date as minix date used code in libc/
	. test compile fix
	. harmonize includes
	. /usr/lib is no longer special: without ack, /usr/lib plays no
	  kind of special bootstrapping role any more and bootstrapping
	  is done exclusively through packages, so releases depend even
	  less on the state of the machine making them now.
	. rename nbsd_lib* to lib*
	. reduce mtree
2012-02-14 14:52:02 +01:00

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.\" $NetBSD: gethostname.3,v 1.17 2006/02/07 18:59:56 wiz Exp $
.\"
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.\" @(#)gethostname.3 8.1 (Berkeley) 6/4/93
.\"
.Dd October 14, 2005
.Dt GETHOSTNAME 3
.Os
.Sh NAME
.Nm gethostname ,
.Nm sethostname
.Nd get/set name of current host
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In unistd.h
.Ft int
.Fn gethostname "char *name" "size_t namelen"
.Ft int
.Fn sethostname "const char *name" "size_t namelen"
.Sh DESCRIPTION
.Fn gethostname
returns the standard host name for the current processor, as
previously set by
.Fn sethostname .
The parameter
.Fa namelen
specifies the size of the
.Fa name
array.
The returned name is null-terminated unless insufficient
space is provided.
.Pp
.Fn sethostname
sets the name of the host machine to be
.Fa name ,
which has length
.Fa namelen .
This call is restricted to the super-user and
is normally used only when the system is bootstrapped.
.Sh RETURN VALUES
If the call succeeds a value of 0 is returned.
If the call fails, a value of \-1 is returned and an error code is
placed in the global location
.Va errno .
.Sh ERRORS
If the
.Fn gethostname
or
.Fn sethostname
functions fail,
they will set
.Va errno
for any of the errors specified for the routine
.Xr sysctl 3 .
.Sh SEE ALSO
.Xr gethostid 3 ,
.Xr sysctl 3 ,
.Xr sysctl 8
.Sh STANDARDS
The
.Fn gethostname
function conforms to
.St -xpg4.2 .
.Sh HISTORY
The
.Nm
function call appeared in
.Bx 4.2 .
.Sh BUGS
Host names are limited to
.Dv MAXHOSTNAMELEN
(from
.Ao Pa sys/param.h Ac )
characters including null-termination, currently 256.