QUOTACTL

By: Chief Editor/Director on 2022-02-14 at 10:26:36 | Views: 6

Set disk quotas SYNTAX #include int quotactl(cmd, special, uid, addr) int cmd; char *special; int uid; caddr_t addr;DESCRIPTION The quotactl() call manipulates disk quotas. cmd indi­ cates a command to be applied to UID id or GID id. To set the type of quota use the QCMD(cmd,type) macro. special is a pointer to a null-terminated string containing the path name of the block special device for the file system being manipulated. addr is the address of an optional, command specific, data structure which is copied in or out of the system. The interpretation of addr is given with each command below. Q_QUOTAON Turn on quotas for a file system. addr points to the path name of file containing the quotas for the file system. The quota file must exist; it is normally created with the quotacheck program. This call is restricted to the super-user. Q_QUOTAOFF Turn off quotas for a file system. addr and uid are ignored. This call is restricted to the super-user. Q_GETQUOTA Get disk quota limits and current usage for user or group id. addr is a pointer to a dqblk structure (defined in ). Only the super-user may get the quotas of a user other than him­ self. Q_SETQUOTA Set disk quota limits and current usage for user or group id. addr is a pointer to a dqblk structure (defined in ). This call is restricted to the super-user. Q_SETQLIM Set disk quota limits for user or group id. addr is a pointer to a dqblk structure (defined in ). This call is restricted to the super-user. Q_SYNC Update the on-disk copy of quota usages for a file system. If special is null then all file systems with active quotas are sync&qt;&qt;ed. addr and uid are ignored.RETURN VALUES 0 on success. -1 on failure and sets errno to indicate the error.



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