quotactl (7) ( Solaris man: Макропакеты и соглашения )
BSD mandoc
NAME
quotactl
- manipulate file system quotas
LIBRARY
Lb libc
SYNOPSIS
#include <sys/types.h>
#include <ufs/ufs/quota.h> int
quotactl (const char *path int cmd int id void *addr);
DESCRIPTION
The
quotactl ();
system call enables, disables and
manipulates file system quotas.
A quota control command
given by
Fa cmd
operates on the given filename
Fa path
for the given user or group
Fa id .
(NOTE: One should use the QCMD macro defined in
#include <ufs/ufs/quota.h>
to formulate the value for
Fa cmd . )
The address of an optional command specific data structure,
Fa addr ,
may be given; its interpretation
is discussed below with each command.
For commands that use the
Fa id
identifier, it must be either -1 or any positive value.
The value of -1 indicates that the current UID or GID should be used.
Any other negative value will return an error.
Currently quotas are supported only for the
``ufs''
file system.
For
``ufs''
a command is composed of a primary command (see below)
and a command type used to interpret the
Fa id .
Types are supported for interpretation of user identifiers (USRQUOTA)
and group identifiers (GRPQUOTA).
The
``ufs''
specific commands are:
Q_QUOTAON
Enable disk quotas for the file system specified by
Fa path .
The command type specifies the type of the quotas being enabled.
The
Fa addr
argument specifies a file from which to take the quotas.
The quota file must exist;
it is normally created with the
quotacheck(8)
program.
The
Fa id
argument is unused.
Only the super-user may turn quotas on.
Q_QUOTAOFF
Disable disk quotas for the file system specified by
Fa path .
The command type specifies the type of the quotas being disabled.
The
Fa addr
and
Fa id
arguments are unused.
Only the super-user may turn quotas off.
Q_GETQUOTA
Get disk quota limits and current usage for the user or group
(as determined by the command type) with identifier
Fa id .
The
Fa addr
argument
is a pointer to a
Fa struct dqblk
structure (defined in
In ufs/ufs/quota.h ) .
Q_SETQUOTA
Set disk quota limits for the user or group
(as determined by the command type) with identifier
Fa id .
The
Fa addr
argument
is a pointer to a
Fa struct dqblk
structure (defined in
In ufs/ufs/quota.h ) .
The usage fields of the
Fa dqblk
structure are ignored.
This system call is restricted to the super-user.
Q_SETUSE
Set disk usage limits for the user or group
(as determined by the command type) with identifier
Fa id .
The
Fa addr
argument
is a pointer to a
Fa struct dqblk
structure (defined in
In ufs/ufs/quota.h ) .
Only the usage fields are used.
This system call is restricted to the super-user.
Q_SYNC
Update the on-disk copy of quota usages.
The command type specifies which type of quotas are to be updated.
The
Fa id
and
Fa addr
arguments are ignored.
RETURN VALUES
Rv -std quotactl
ERRORS
The
quotactl ();
system call will fail if:
Bq Er EOPNOTSUPP
The kernel has not been compiled with the
QUOTA
option.
Bq Er EUSERS
The quota table cannot be expanded.
Bq Er EINVAL
The
Fa cmd
argument
or the command type is invalid.
In
Q_GETQUOTA
and
Q_SETQUOTA
quotas are not currently enabled for this file system.
The
Fa id
argument to
Q_GETQUOTAQ_SETQUOTA
or
Q_SETUSE
is a negative value.
Bq Er EACCES
In
Q_QUOTAON
the quota file is not a plain file.
Bq Er EACCES
Search permission is denied for a component of a path prefix.
Bq Er ENOTDIR
A component of a path prefix was not a directory.
Bq Er ENAMETOOLONG
A component of either pathname exceeded 255 characters,
or the entire length of either path name exceeded 1023 characters.
Bq Er ENOENT
A filename does not exist.
Bq Er ELOOP
Too many symbolic links were encountered in translating a pathname.
Bq Er EROFS
In
Q_QUOTAON
the quota file resides on a read-only file system.
Bq Er EIO
An
I/O
error occurred while reading from or writing
to a file containing quotas.
Bq Er EFAULT
An invalid
Fa addr
was supplied; the associated structure could not be copied in or out
of the kernel.
Bq Er EFAULT
The
Fa path
argument
points outside the process's allocated address space.
Bq Er EPERM
The call was privileged and the caller was not the super-user.
