2fe8fb192f
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
122 lines
3.8 KiB
Groff
122 lines
3.8 KiB
Groff
.\" $NetBSD: swapon.3,v 1.16 2010/05/31 12:16:20 njoly Exp $
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.\"
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.\" Copyright (c) 1980, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)swapon.2 8.1 (Berkeley) 6/4/93
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.\"
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.Dd June 4, 1993
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.Dt SWAPON 3
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.Os
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.Sh NAME
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.Nm swapon
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.Nd add a swap device for interleaved paging/swapping
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.Sh SYNOPSIS
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.In unistd.h
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.Ft int
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.Fn swapon "const char *special"
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.Sh DESCRIPTION
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.Bf -symbolic
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.\" This interface is available from the compatibility library, libcompat and
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This interface is provided for compatibility only and
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has been obsoleted by
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.Xr swapctl 2 .
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.Ef
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.Pp
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.Fn swapon
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makes the block device
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.Fa special
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available to the system for
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allocation for paging and swapping.
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The names of potentially available devices are known to the system
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and defined at system configuration time.
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The size of the swap area on
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.Fa special
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is calculated at the time the device is first made available
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for swapping.
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.Sh RETURN VALUES
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If an error has occurred, a value of \-1 is returned and
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.Va errno
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is set to indicate the error.
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.Sh ERRORS
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.Fn swapon
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succeeds unless:
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.Bl -tag -width ENAMETOOLONG
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.It Bq Er ENOTDIR
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A component of the path prefix is not a directory.
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.It Bq Er ENAMETOOLONG
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A component of a pathname exceeded
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.Brq Dv NAME_MAX
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characters, or an entire path name exceeded
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.Brq Dv PATH_MAX
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characters.
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.It Bq Er ENOENT
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The named device does not exist.
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.It Bq Er EACCES
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Search permission is denied for a component of the path prefix.
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.It Bq Er ELOOP
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Too many symbolic links were encountered in translating the pathname.
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.It Bq Er EPERM
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The caller is not the super-user.
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.It Bq Er ENOTBLK
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.Fa special
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is not a block device.
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.It Bq Er EBUSY
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The device specified by
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.Fa special
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has already
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been made available for swapping
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.It Bq Er EINVAL
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The device configured by
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.Fa special
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was not
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configured into the system as a swap device.
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.It Bq Er ENXIO
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The major device number of
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.Fa special
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is out of range (this indicates no device driver exists
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for the associated hardware).
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.It Bq Er EIO
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An I/O error occurred while opening the swap device.
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.It Bq Er EFAULT
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.Fa special
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points outside the process's allocated address space.
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.El
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.Sh SEE ALSO
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.Xr swapctl 2 ,
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.Xr swapctl 8 ,
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.Xr swapon 8
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.Sh HISTORY
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The
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.Fn swapon
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function call appeared in
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.Bx 4.0
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and was removed
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.Nx 1.3
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.Sh BUGS
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This call will be upgraded in future versions of the system.
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