cc [ flag… ] file… –D_LARGEFILE64_SOURCE –lcontract [ library… ] #include <libcontract.h> #include <sys/contract/device.h> int ct_dev_status_get_dev_state(ct_stathdl_t stathdl, uint_t *statep);
int ct_dev_status_get_aset(ct_stathdl_t stathdl, uint_t *asetp);
int ct_dev_status_get_minor(ct_stathdl_t stathdl, char *buf, size_t *buflenp);
int ct_dev_status_get_noneg(ct_stathdl_t stathdl, uint_t *nonegp);
a pointer to a uint_t variable for receiving the acceptable state set (such as A-set) for the contract
a buffer for receiving the devfs path of a minor in a contract
a pointer to a variable of type size_t for passing the size of the buffer buf. If the buffer is too small (< PATH_MAX), the minimum size of the buffer needed (PATH_MAX) is passed back to the caller with this argument.
a pointer to a uint_t variable for receiving the setting of the “noneg” term
a status object returned by ct_status_read(3CONTRACT)
a pointer to a uint_t variable for receiving the current state of the device which is the subject of the contract
These functions read contract status information from a status object stathdl returned by ct_status_read(). The detail level in the call to ct_status_read() needs to be at least CTD_FIXED for the following calls to be successful. The one exception is ct_dev_status_get_minor(), which requires a detail level of CTD_ALL.
The ct_dev_status_get_dev_state() function returns the current state of the device which is the subject of the contract. This can be one of the following:
The device is online and functioning normally.
The device is online but degraded.
The device is offline and not configured.
The ct_dev_status_get_aset() function returns the A-set of the contract. This can be the bitset of one or more of the following states: CT_DEV_EV_ONLINE, CT_DEV_EV_DEGRADED, or CT_DEV_EV_OFFLINE.
The ct_dev_status_get_minor() function reads the devfs path of the minor participating in the contract. The devfs path returned does not include the /devices prefix. If the buffer passed in by the caller is too small (< PATH_MAX), the minimum size of the buffer required ( PATH_MAX) is returned to the caller via the buflenp argument.
The ct_dev_status_get_noneg() function returns the “noneg” setting for the contract. A value of 1 is returned in the nonegp argument if NONEG is set, else 0 is returned.
Upon successful completion, these functions return 0. Otherwise, they return a non-zero error value.
The ct_dev_status_get_minor() function will fail if:
The buffer size is too small to hold the result.
The ct_dev_status_get_dev_state(), ct_dev_status_get_aset(), ct_dev_status_get_minor() and ct_dev_status_get_noneg() functions will fail if:
An invalid argument was specified.
The requested data is not present in the status object.
See attributes(5) for descriptions of the following attributes: