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quota
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quota

quota — Functions for manipulating disk quotas.

Synopsis




int         quota_on                        (void);
int         quota_off                       (void);
char**      quota_get_specials_user         (void);
char**      quota_get_specials_group        (void);
void        quota_free_specials             (char **specials);
int         quota_get_user                  (uid_t uid,
                                             const char *special,
                                             int32_t *inode_usage,
                                             int32_t *inode_soft,
                                             int32_t *inode_hard,
                                             int32_t *inode_grace,
                                             int32_t *block_usage,
                                             int32_t *block_soft,
                                             int32_t *block_hard,
                                             int32_t *block_grace);
int         quota_set_user                  (uid_t uid,
                                             const char *special,
                                             int32_t inode_soft,
                                             int32_t inode_hard,
                                             int32_t inode_grace,
                                             int32_t block_soft,
                                             int32_t block_hard,
                                             int32_t block_grace);
int         quota_get_group                 (gid_t gid,
                                             const char *special,
                                             int32_t *inode_usage,
                                             int32_t *inode_soft,
                                             int32_t *inode_hard,
                                             int32_t *inode_grace,
                                             int32_t *block_usage,
                                             int32_t *block_soft,
                                             int32_t *block_hard,
                                             int32_t *block_grace);
int         quota_set_group                 (gid_t gid,
                                             const char *special,
                                             int32_t inode_soft,
                                             int32_t inode_hard,
                                             int32_t inode_grace,
                                             int32_t block_soft,
                                             int32_t block_hard,
                                             int32_t block_grace);

Description

quota.h declares functions which are useful for querying and manipulating user and group disk quotas under Linux. These routines are not portable to other operating systems.

Details

quota_on ()

int         quota_on                        (void);

Enables enforcing quotas on filesystems where quotas are configured.

Returns :0 on success, -1 on error

quota_off ()

int         quota_off                       (void);

Disables enforcing quotas on filesystems where quotas are configured.

Returns :0 on success, -1 on error

quota_get_specials_user ()

char**      quota_get_specials_user         (void);

Gets a list of currently mounted filesystems which have user quotas enabled.

Returns :If sucessful, a NULL-terminated array of device names that should be freed by quota_free_specials(). On error returns NULL.

quota_get_specials_group ()

char**      quota_get_specials_group        (void);

Gets a list of currently mounted filesystems which have group quotas enabled.

Returns :If sucessful, a NULL-terminated array of device names that should be freed by quota_free_specials(). On error returns NULL.

quota_free_specials ()

void        quota_free_specials             (char **specials);

Frees the array returned by quota_get_specials_user() or quota_get_specials_group()

specials :array to be freed

quota_get_user ()

int         quota_get_user                  (uid_t uid,
                                             const char *special,
                                             int32_t *inode_usage,
                                             int32_t *inode_soft,
                                             int32_t *inode_hard,
                                             int32_t *inode_grace,
                                             int32_t *block_usage,
                                             int32_t *block_soft,
                                             int32_t *block_hard,
                                             int32_t *block_grace);

Gets information about user quota on a device.

uid :UID to get information about
special :block device name
inode_usage :number of used inodes
inode_soft :soft inode limit
inode_hard :hard inode limit
inode_grace :inode grace time in seconds
block_usage :number of used blocks (each block is 1 kB)
block_soft :soft block limit
block_hard :hard block limit
block_grace :block grace time in seconds
Returns :0 on success, -1 on failure

quota_set_user ()

int         quota_set_user                  (uid_t uid,
                                             const char *special,
                                             int32_t inode_soft,
                                             int32_t inode_hard,
                                             int32_t inode_grace,
                                             int32_t block_soft,
                                             int32_t block_hard,
                                             int32_t block_grace);

Sets user quota on a device.

uid :UID to get information about
special :block device name
inode_soft :soft inode limit
inode_hard :hard inode limit
inode_grace :inode grace time in seconds
block_soft :soft block limit
block_hard :hard block limit
block_grace :block grace time in seconds
Returns :0 on success, -1 on failure

quota_get_group ()

int         quota_get_group                 (gid_t gid,
                                             const char *special,
                                             int32_t *inode_usage,
                                             int32_t *inode_soft,
                                             int32_t *inode_hard,
                                             int32_t *inode_grace,
                                             int32_t *block_usage,
                                             int32_t *block_soft,
                                             int32_t *block_hard,
                                             int32_t *block_grace);

Gets information about group quota on a device.

gid :GID to get information about
special :block device name
inode_usage :number of used inodes
inode_soft :soft inode limit
inode_hard :hard inode limit
inode_grace :inode grace time in seconds
block_usage :number of used blocks (each block is 1 kB)
block_soft :soft block limit
block_hard :hard block limit
block_grace :block grace time in seconds
Returns :0 on success, -1 on failure

quota_set_group ()

int         quota_set_group                 (gid_t gid,
                                             const char *special,
                                             int32_t inode_soft,
                                             int32_t inode_hard,
                                             int32_t inode_grace,
                                             int32_t block_soft,
                                             int32_t block_hard,
                                             int32_t block_grace);

Sets group quota on a device.

gid :GID to get information about
special :block device name
inode_soft :soft inode limit
inode_hard :hard inode limit
inode_grace :inode grace time in seconds
block_soft :soft block limit
block_hard :hard block limit
block_grace :block grace time in seconds
Returns :0 on success, -1 on failure
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