quotactl.2 (2010 09)

quotactl(2) quotactl(2)

ERRORS

quotactl() fails when any of the following occurs:

[EACCES] The quota ﬁle pointed to by addr exists but is either not a regular ﬁle or is not

on the ﬁle system pointed to by special .

[EBUSY]

Q_QUOTAON attempted while another Q_QUOTAON or

Q_QUOTAOFF is in pro-

gress.

[EDQUOT] User’s disk quota block limit has been reached for this ﬁle system.

[EFAULT] The addr or special parameter points to an invalid address. Reliable detection

of this error is implementation-dependent.

[EINVAL] The parameters cmd and/or id are invalid.

[ENODEV] The parameter special contains a type of ﬁle system that does not support quo-

tas. Currently, quotas are supported on HFS and VxFS ﬁle systems.

[ENOENT] The ﬁle speciﬁed by special or addr does not exist.

[ENOSYS] The kernel has not been conﬁgured with the disk quota subsystem.

[ENOTBLK] The parameter special is not a block device.

[EOPNOTSUPP] Type of quota not supported on the ﬁle system.

[EOVERFLOW] 64-bit values will overﬂow 32-bit ﬁelds, either in the

dqblk struct in the user

level (for

Q_GETQUOTA) or in a 32-bit ﬁle system in the kernel (for

Q_SETQUOTA64 and Q_SETQLIM64).

[EPERM] The call is privileged and the calling process does not have appropriate

privileges.

[ESRCH] No disc quota is found for the indicated user or quotas have not been turned on

for this ﬁle system.

WARNINGS

The

quotactl() system call is incompatible with the 4.2/4.3 BSD implementation of Melbourne quotas

which uses a different system call interface and on-disk data structure.

Use

Q_GETQUOTA64, Q_SETQUOTA64, and Q_SETQLIM64 commands for 64-bit ﬁeld values.

AUTHOR

quotactl() was developed by HP and Sun Microsystems, Inc.