38065bce20
high-order bit set", as this error is obsolete. Eventually we may want to add code to some of the "optional" filesystems (msdosfs, etc.) that checks for illegal characters. At that time it would be appropriate to reintroduce this error with appropriate text. Perhaps "The pathname contains a character that is not valid for filesystem type".
216 lines
6.1 KiB
Groff
216 lines
6.1 KiB
Groff
.\" Copyright (c) 1983, 1990, 1991 Regents of the University of California.
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.\" 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. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. 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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.\" from: @(#)quotactl.2 6.13 (Berkeley) 7/23/91
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.\" $Id: quotactl.2,v 1.7 1994/04/22 00:13:43 jtc Exp $
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.\"
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.Dd July 23, 1991
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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 SYNOPSIS
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.Fd #include <ufs/quota.h> /* for ufs quotas */
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.Ft int
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.Fn quotactl "const char *path" "int cmd" "int id" "char *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 ``ufs'' filesystem.
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For ``ufs'',
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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 ``ufs'' 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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.Ao Pa ufs/quota.h Ac ) .
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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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.Ao Pa ufs/quota.h Ac ) .
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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 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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.Ao Pa ufs/quota.h Ac ) .
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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.
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.It Bq Er EACCES
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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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.Dv {NAME_MAX}
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characters, or an entire path name exceeded
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.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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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 EFAULT
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.Fa Path
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points outside the process's allocated address space.
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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 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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.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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