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
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5.9 KiB
Groff
213 lines
5.9 KiB
Groff
.\" $NetBSD: quotactl.2,v 1.26 2010/05/31 12:16:20 njoly Exp $
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.\"
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.\" Copyright (c) 1983, 1990, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" Robert Elz at The University of Melbourne.
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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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.\" @(#)quotactl.2 8.2 (Berkeley) 3/10/95
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.\"
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.Dd October 9, 2008
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.Dt QUOTACTL 2
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.Os
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.Sh NAME
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.Nm quotactl
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.Nd manipulate filesystem quotas
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In ufs/ufs/quota.h
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.Ft int
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.Fn quotactl "const char *path" "int cmd" "int id" "void *addr"
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.Sh DESCRIPTION
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The
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.Fn quotactl
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call enables, disables and
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manipulates filesystem quotas.
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A quota control command
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given by
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.Fa cmd
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operates on the given filename
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.Fa path
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for the given user
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.Fa id .
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The address of an optional command specific data structure,
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.Fa addr ,
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may be given; its interpretation
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is discussed below with each command.
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.Pp
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Currently quotas are supported only for the ``ffs''
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and ``lfs'' filesystem.
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For both of them,
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a command is composed of a primary command (see below)
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and a command type used to interpret the
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.Fa id .
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Types are supported for interpretation of user identifiers
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and group identifiers.
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The ``ffs'' and ``lfs'' specific commands are:
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.Bl -tag -width Q_QUOTAON
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.It Dv Q_QUOTAON
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Enable disk quotas for the filesystem specified by
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.Fa path .
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The command type specifies the type of the quotas being enabled.
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The
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.Fa addr
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argument specifies a file from which to take the quotas.
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The quota file must exist;
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it is normally created with the
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.Xr quotacheck 8
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program.
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The
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.Fa id
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argument is unused.
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Only the super-user may turn quotas on.
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.It Dv Q_QUOTAOFF
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Disable disk quotas for the filesystem specified by
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.Fa path .
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The command type specifies the type of the quotas being disabled.
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The
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.Fa addr
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and
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.Fa id
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arguments are unused.
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Only the super-user may turn quotas off.
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.It Dv Q_GETQUOTA
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Get disk quota limits and current usage for the user or group
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(as determined by the command type) with identifier
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.Fa id .
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.Fa addr
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is a pointer to a
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.Fa struct dqblk
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structure (defined in
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.In ufs/ufs/quota.h ) .
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.It Dv Q_SETQUOTA
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Set disk quota limits for the user or group
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(as determined by the command type) with identifier
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.Fa id .
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.Fa addr
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is a pointer to a
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.Fa struct dqblk
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structure (defined in
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.In ufs/ufs/quota.h ) .
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The usage fields of the
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.Fa dqblk
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structure are ignored.
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This call is restricted to the super-user.
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.It Dv Q_SETUSE
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Set disk usage for the user or group
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(as determined by the command type) with identifier
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.Fa id .
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.Fa addr
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is a pointer to a
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.Fa struct dqblk
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structure (defined in
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.In ufs/ufs/quota.h ) .
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Only the usage fields are used.
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This call is restricted to the super-user.
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.It Dv Q_SYNC
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Update the on-disk copy of quota usages.
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The command type specifies which type of quotas are to be updated.
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The
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.Fa id
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and
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.Fa addr
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parameters are ignored.
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.El
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.Sh RETURN VALUES
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A successful call returns 0,
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otherwise the value \-1 is returned and the global variable
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.Va errno
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indicates the reason for the failure.
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.Sh ERRORS
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A
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.Fn quotactl
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call will fail if:
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.Bl -tag -width Er
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.It Bq Er EOPNOTSUPP
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The kernel has not been compiled with the
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.Dv QUOTA
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option.
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.It Bq Er EUSERS
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The quota table cannot be expanded.
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.It Bq Er EINVAL
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.Fa cmd
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or the command type is invalid.
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.It Bq Er EACCES
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In
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.Dv Q_QUOTAON ,
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the quota file is not a plain file, or
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search permission is denied for a component of a path prefix.
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.It Bq Er ENOTDIR
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A component of a path prefix was 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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A filename does not exist.
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.It Bq Er ELOOP
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Too many symbolic links were encountered in translating a pathname.
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.It Bq Er EROFS
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In
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.Dv Q_QUOTAON ,
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the quota file resides on a read-only filesystem.
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.It Bq Er EIO
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An
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.Tn I/O
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error occurred while reading from or writing
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to a file containing quotas.
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.It Bq Er EFAULT
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.Fa path
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points outside the process's allocated address space, or
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an invalid
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.Fa addr
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was supplied; the associated structure could not be copied in or out
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of the kernel.
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.It Bq Er EPERM
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The call was privileged and the caller was not the super-user.
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.El
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.Sh SEE ALSO
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.Xr quota 1 ,
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.Xr fstab 5 ,
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.Xr edquota 8 ,
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.Xr quotacheck 8 ,
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.Xr quotaon 8 ,
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.Xr repquota 8
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.Sh HISTORY
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The
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.Fn quotactl
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function call appeared in
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.Bx 4.3 Reno .
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.Sh BUGS
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There should be some way to integrate this call with the resource
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limit interface provided by
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.Xr setrlimit 2
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and
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.Xr getrlimit 2 .
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