.\" Copyright (c) 1983, 1990, 1991 Regents of the University of California.
.\" This code is derived from software contributed to Berkeley by
.\" Robert Elz at The University of Melbourne.
.\" %sccs.include.redist.man%
.\" @(#)quotactl.2 6.12 (Berkeley) %G%
.Nd manipulate filesystem quotas
.Ft #include <ufs/quota.h> /* for ufs quotas */
.Fn quotactl "const char *path" "int cmd" "int id" "char *addr"
call enables, disables and
manipulates filesystem quotas.
operates on the given filename
The address of an optional command specific data structure,
may be given; its interpretation
is discussed below with each command.
Currently quotas are supported only for the ``ufs'' filesystem.
a command is composed of a primary command (see below)
and a command type used to interpret the
Types are supported for interpretation of user identifiers
The ``ufs'' specific commands are:
.Bl -tag -width Q_QUOTAON
Enable disk quotas for the filesystem specified by
The command type specifies the type of the quotas being enabled.
argument specifies a file from which to take the quotas.
The quota file must exist;
it is normally created with the
Only the super-user may turn quotas on.
Disable disk quotas for the filesystem specified by
The command type specifies the type of the quotas being disabled.
Only the super-user may turn quotas off.
Get disk quota limits and current usage for the user or group
(as determined by the command type) with identifier
.Ao Pa ufs/quota.h Ac ) .
Set disk quota limits for the user or group
(as determined by the command type) with identifier
.Ao Pa ufs/quota.h Ac ) .
This call is restricted to the super-user.
Set disk usage limits for the user or group
(as determined by the command type) with identifier
.Ao Pa ufs/quota.h Ac ) .
Only the usage fields are used.
This call is restricted to the super-user.
Update the on-disk copy of quota usages.
The command type specifies which type of quotas are to be updated.
A successful call returns 0,
otherwise the value -1 is returned and the global variable
indicates the reason for the failure.
.Bl -tag -width ENAMETOOLONGAA
The kernel has not been compiled with the
The quota table cannot be expanded.
or the command type is invalid.
A pathname contains a character with the high-order bit set.
the quota file is not a plain file.
Search permission is denied for a component of a path prefix.
A component of a path prefix was not a directory.
A component of either pathname exceeded 255 characters,
or the entire length of either path name exceeded 1023 characters.
A filename does not exist.
Too many symbolic links were encountered in translating a pathname.
the quota file resides on a read-only filesystem.
An I/O error occurred while reading from or writing
to a file containing quotas.
was supplied; the associated structure could not be copied in or out
points outside the process's allocated address space.
The call was privileged and the caller was not the super-user.
There should be some way to integrate this call with the resource
limit interface provided by
function call appeared in
projects / unix-history / blob