.\" Copyright (c) 1983 Regents of the University of California.
.\" All rights reserved.  The Berkeley software License Agreement
.\" specifies the terms and conditions for redistribution.
.\"
.\"	@(#)setquota.2	6.4 (Berkeley) 8/26/85
.\"
.TH SETQUOTA 2 "August 26, 1985"
.UC 5
.SH NAME
setquota \- enable/disable quotas on a file system
.SH SYNOPSIS
.nf
.B setquota(special, file)
.B char *special, *file;
.fi
.SH DESCRIPTION
Disc quotas are enabled or disabled with the
.I setquota
call.
.I Special
indicates a block special device on which a
mounted file system exists.
If
.I file
is nonzero, it specifies a file in that
file system from which to take the quotas.  If
.I file
is 0, then quotas are disabled on the file system.
The quota file must exist; it is normally created
with the 
.IR quotacheck (8)
program.
.PP
Only the super-user may turn quotas on or off.
.SH "SEE ALSO"
quota(2), quotacheck(8), quotaon(8)
.SH "RETURN VALUE"
A 0 return value indicates a successful call.  A value
of \-1 is returned when an error occurs and 
.I errno
is set to indicate the reason for failure.
.SH ERRORS
.I Setquota
will fail when one of the following occurs:
.TP 15
[ENOTDIR]
A component of either path prefix is not a directory.
.TP 15
[EINVAL]
Either pathname contains a character with the high-order bit set.
.TP 15
[EINVAL]
The kernel has not been compiled with the QUOTA option.
.TP 15
[ENAMETOOLONG]
A component of either pathname exceeded 255 characters,
or the entire length of either path name exceeded 1023 characters.
.TP 15
[ENODEV]
.I Special
does not exist.
.TP 15
[ENOENT]
.I File
does not exist.
.TP 15
[ELOOP]
Too many symbolic links were encountered in translating either pathname.
.TP 15
[EPERM]
The caller is not the super-user.
.TP 15
[ENOTBLK]
.I Special
is not a block device.
.TP 15
[ENXIO]
The major device number of 
.I special
is out of range (this indicates no device driver exists
for the associated hardware).
.TP 15
[EROFS]
.I File
resides on a read-only file system.
.TP 15
[EACCES]
Search permission is denied for a component of either path prefix.
.TP 15
[EACCES]
.I File
resides on a file system different from
.IR special .
.TP 15
[EACCES]
.I File
is not a plain file.
.TP 15
[EIO]
An I/O error occurred while reading from or writing to the file containing
the quotas.
.TP 15
[EFAULT]
.I Special
or \fIpath\fP points outside the process's allocated address space.
.SH BUGS
The error codes are in a state of disarray; too many errors
appear to the caller as one value.