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scf_snapshot_create, scf_snapshot_handle, scf_snapshot_destroy, scf_snapshot_get_parent, scf_snapshot_get_name, scf_snapshot_update, scf_instance_get_snapshot - create and manipulate snapshot handles and snapshots in the Service Configuration Facility

cc [ flag.\|.\|. ] file.\|.\|. -lscf [ library.\|.\|. ]
#include <libscf.h>

scf_snapshot_t *scf_snapshot_create(scf_handle_t *handle);

scf_handle_t *scf_snapshot_handle(scf_snapshot_t *snap);

void scf_snapshot_destroy(scf_snapshot_t *snap);

int scf_snapshot_get_parent(const scf_snapshot_t *snap,
 scf_instance_t *inst);

ssize_t scf_snapshot_get_name(const scf_snapshot_t *snap,
 char *buf, size_t size);

int scf_snapshot_update(scf_snapshot_t *snap);

int scf_instance_get_snapshot(const scf_instance_t *inst,
 const char *name, scf_snapshot_t *snap);

A snapshot is an unchanging picture of the full set of property groups associated with an instance. Snapshots are automatically created and managed by the Service Management Facility. See smf(7).

A snapshot consists of a set of snaplevels, each of which holds copies of the property groups associated with an instance or service in the resolution path of the base instance. Typically, there is one snaplevel for the instance and one for the instance's parent service.

The scf_snapshot_create() function allocates and initializes a new scf_snapshot_t bound to handle. The scf_snapshot_destroy() function destroys and frees snap.

The scf_snapshot_handle() function retrieves the handle to which snap is bound.

The scf_snapshot_get_parent() function sets inst to the parent of the snapshot to which snap is set.

The scf_snapshot_get_name() function retrieves the name of the snapshot to which snap is set.

The scf_snapshot_update() function reattaches snap to the latest version of the snapshot to which snap is set.

The scf_instance_get_snapshot() function sets snap to the snapshot specified by name in the instance specified by inst. To walk all of the snapshots, see scf_iter_instance_snapshots(3SCF).

To access the snaplevels of a snapshot, see scf_snapshot_get_base_snaplevel(3SCF).

Upon successful completion, scf_snapshot_create() returns a new scf_snapshot_t. Otherwise, it returns NULL.

Upon successful completion, scf_snapshot_handle() returns the handle to which snap is bound. Otherwise, it returns NULL.

Upon successful completion, scf_snapshot_get_name() returns the length of the string written, not including the terminating null byte. Otherwise, it returns NULL.

The scf_snapshot_update() function returns 1 if the snapshot was updated, 0 if the snapshot had not been updated, and -1 on failure.

Upon successful completion, scf_snapshot_get_parent() and scf_instance_get_snapshot() return 0. Otherwise, they return -1.

The scf_snapshot_create() function will fail if: SCF_ERROR_INVALID_ARGUMENT

SCF_ERROR_NO_MEMORY SCF_ERROR_NO_RESOURCES

The scf_snapshot_handle() function will fail if: SCF_ERROR_HANDLE_DESTROYED

The scf_snapshot_get_name() and scf_snapshot_get_parent() functions will fail if: SCF_ERROR_DELETED

SCF_ERROR_NOT_SET SCF_ERROR_NOT_BOUND SCF_ERROR_CONNECTION_BROKEN

The scf_snapshot_update() function will fail if: SCF_ERROR_CONNECTION_BROKEN

SCF_ERROR_DELETED SCF_ERROR_INTERNAL SCF_ERROR_INVALID_ARGUMENT SCF_ERROR_NOT_BOUND SCF_ERROR_NOT_SET

The scf_instance_get_snapshot() function will fail if: SCF_ERROR_BACKEND_ACCESS

SCF_ERROR_CONNECTION_BROKEN SCF_ERROR_DELETED SCF_ERROR_HANDLE_MISMATCH SCF_ERROR_INTERNAL SCF_ERROR_INVALID_ARGUMENT SCF_ERROR_NO_RESOURCES SCF_ERROR_NOT_BOUND SCF_ERROR_NOT_FOUND SCF_ERROR_NOT_SET

The scf_error(3SCF) function can be used to retrieve the error value.

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE

Interface Stability Committed

MT-Level Safe

libscf (3LIB), scf_error (3SCF), scf_iter_instance_snapshots (3SCF), scf_snapshot_get_base_snaplevel (3SCF), attributes (7), smf (7)