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31 .\" @(#)quotactl.2 8.2 (Berkeley) 3/10/95
39 .Nd manipulate file system quotas
46 .Fn quotactl "const char *path" "int cmd" "int id" "void *addr"
50 system call enables, disables and
51 manipulates file system quotas.
52 A quota control command
55 operates on the given filename
57 for the given user or group
59 (NOTE: One should use the QCMD macro defined in
61 to formulate the value for
63 The address of an optional command specific data structure,
65 may be given; its interpretation
66 is discussed below with each command.
68 For commands that use the
70 identifier, it must be either -1 or any positive value.
71 The value of -1 indicates that the current UID or GID should be used.
72 Any other negative value will return an error.
74 Currently quotas are supported only for the
79 a command is composed of a primary command (see below)
80 and a command type used to interpret the
82 Types are supported for interpretation of user identifiers (USRQUOTA)
83 and group identifiers (GRPQUOTA).
86 specific commands are:
87 .Bl -tag -width Q_QUOTAOFFxx
89 Enable disk quotas for the file system specified by
91 The command type specifies the type of the quotas being enabled.
94 argument specifies a file from which to take the quotas.
95 The quota file must exist;
96 it is normally created with the
102 Only the super-user may turn quotas on.
104 Disable disk quotas for the file system specified by
106 The command type specifies the type of the quotas being disabled.
111 arguments are unused.
112 Only the super-user may turn quotas off.
114 Get disk quota limits and current usage for the user or group
115 (as determined by the command type) with identifier
122 structure (defined in
123 .In ufs/ufs/quota.h ) .
125 Set disk quota limits for the user or group
126 (as determined by the command type) with identifier
133 structure (defined in
134 .In ufs/ufs/quota.h ) .
135 The usage fields of the
137 structure are ignored.
138 This system call is restricted to the super-user.
140 Set disk usage limits for the user or group
141 (as determined by the command type) with identifier
148 structure (defined in
149 .In ufs/ufs/quota.h ) .
150 Only the usage fields are used.
151 This system call is restricted to the super-user.
153 Update the on-disk copy of quota usages.
154 The command type specifies which type of quotas are to be updated.
159 arguments are ignored.
166 system call will fail if:
169 The kernel has not been compiled with the
173 The quota table cannot be expanded.
178 or the command type is invalid.
183 quotas are not currently enabled for this file system.
196 the quota file is not a plain file.
198 Search permission is denied for a component of a path prefix.
200 A component of a path prefix was not a directory.
201 .It Bq Er ENAMETOOLONG
202 A component of either pathname exceeded 255 characters,
203 or the entire length of either path name exceeded 1023 characters.
205 A filename does not exist.
207 Too many symbolic links were encountered in translating a pathname.
211 the quota file resides on a read-only file system.
215 error occurred while reading from or writing
216 to a file containing quotas.
220 was supplied; the associated structure could not be copied in or out
226 points outside the process's allocated address space.
228 The call was privileged and the caller was not the super-user.
240 system call appeared in
243 There should be some way to integrate this call with the resource
244 limit interface provided by