Unix/Linux Go Back    


OpenDarwin 7.2.1 - man page for quotactl (opendarwin section 2)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:   man
Select Man Page Set:       apropos Keyword Search (sections above)


QUOTACTL(2)			     BSD System Calls Manual			      QUOTACTL(2)

NAME
     quotactl -- manipulate filesystem quotas

SYNOPSIS
     #include <sys/quota.h>   /* for disk quotas */

     int
     quotactl(const char *path, int cmd, int id, char *addr);

DESCRIPTION
     The quotactl() call enables, disables and manipulates filesystem quotas.  A quota control
     command given by cmd operates on the given filename path for the given user id.  The address
     of an optional command specific data structure, addr, may be given; its interpretation is
     discussed below with each command.

     Currently quotas are supported only for the "ffs" and "hfs" filesystems.  A command is com-
     posed of a primary command (see below) and a command type used to interpret the id.  Types
     are supported for interpretation of user identifiers and group identifiers.  The specific
     commands are:

     Q_QUOTAON	  Enable disk quotas for the filesystem specified by path.  The command type
		  specifies the type of the quotas being enabled.  The 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 id argument is unused.  Only the
		  super-user may turn quotas on.

     Q_QUOTAOFF   Disable disk quotas for the filesystem specified by path.  The command type
		  specifies the type of the quotas being disabled.  The addr and 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 id.  Addr is a pointer to a struct dqblk
		  structure.

     Q_SETQUOTA   Set disk quota limits for the user or group (as determined by the command type)
		  with identifier id.  Addr is a pointer to a struct dqblk structure.  The usage
		  fields of the dqblk structure are ignored.  This 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 id.  Addr is a pointer to a struct dqblk structure.  Only the
		  usage fields are used.  This 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 id and addr parameters are ignored.

     Q_QUOTASTAT  Get the enable status for the filesystem specified by path.  The command type
		  specifies the type of the quotas whose status is being queried.  Addr is a
		  pointer to an integer.  Upon return, this integer will hold a zero value if
		  quotas for the given type are not enabled and a non-zero value if quotas for
		  the given type are enabled.  The id parameter is ignored.

RETURN VALUES
     A successful call returns 0, otherwise the value -1 is returned and the global variable
     errno indicates the reason for the failure.

ERRORS
     A quotactl() call will fail if:

     [EOPNOTSUPP]	The kernel has not been compiled with the QUOTA option.

     [EUSERS]		The quota table cannot be expanded.

     [EINVAL]		Cmd or the command type is invalid.

     [EACCES]		In Q_QUOTAON, the quota file is not a plain file.

     [EACCES]		Search permission is denied for a component of a path prefix.

     [ENOTDIR]		A component of a path prefix was not a directory.

     [ENAMETOOLONG]	A component of a pathname exceeded {NAME_MAX} characters, or an entire
			path name exceeded {PATH_MAX} characters.

     [ENOENT]		A filename does not exist.

     [ELOOP]		Too many symbolic links were encountered in translating a pathname.

     [EROFS]		In Q_QUOTAON, the quota file resides on a read-only filesystem.

     [EIO]		An I/O error occurred while reading from or writing to a file containing
			quotas.

     [EFAULT]		An invalid addr was supplied; the associated structure could not be
			copied in or out of the kernel.

     [EFAULT]		Path points outside the process's allocated address space.

     [EPERM]		The call was privileged and the caller was not the super-user.

SEE ALSO
     quota(1), fstab(5), edquota(8), quotacheck(8), quotaon(8), repquota(8)

BUGS
     There should be some way to integrate this call with the resource limit interface provided
     by setrlimit(2) and getrlimit(2).

HISTORY
     The quotactl() function call appeared in 4.3BSD-Reno.

BSD					   June 4, 1993 				      BSD
Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums


All times are GMT -4. The time now is 09:17 AM.