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scf_snapshot_create(3scf)
Service Configuration Facility Library Functions scf_snapshot_create(3SCF)
NAME
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
SYNOPSIS
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);
DESCRIPTION
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 Solaris 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_error() function is not modified by
this call.
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 ver‐
sion 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_snap‐
shot_get_base_snaplevel(3SCF).
RETURN VALUES
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. Other‐
wise, 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.
ERRORS
The scf_snapshot_create() function will fail if:
SCF_ERROR_INVALID_ARGUMENT
The handle argument is NULL.
SCF_ERROR_NO_MEMORY
There is not enough memory to allocate an scf_snapshot_t.
SCF_ERROR_NO_RESOURCES
The server does not have adequate resources for a new instance han‐
dle.
The scf_snapshot_handle() function will fail if:
SCF_ERROR_HANDLE_DESTROYED
The handle associated with snap has been destroyed.
The scf_snapshot_get_name() and scf_snapshot_get_parent() functions
will fail if:
SCF_ERROR_DELETED
The snapshot has been deleted.
SCF_ERROR_NOT_SET
The snapshot is not set.
SCF_ERROR_NOT_BOUND
The handle is not bound.
SCF_ERROR_CONNECTION_BROKEN
The connection to the repository was lost.
The scf_snapshot_update() function will fail if:
SCF_ERROR_CONNECTION_BROKEN
The connection to the repository was lost.
SCF_ERROR_DELETED
An ancestor of the snapshot specified by snap has been deleted.
SCF_ERROR_INTERNAL
An internal error occurred. This can happen if snap has been cor‐
rupted.
SCF_ERROR_INVALID_ARGUMENT
The snap argument refers to an invalid scf_snapshot_t.
SCF_ERROR_NOT_BOUND
The handle is not bound.
SCF_ERROR_NOT_SET
The snapshot specified by snap is not set.
The scf_instance_get_snapshot() function will fail if:
SCF_ERROR_BACKEND_ACCESS
The storage mechanism that the repository server (svc.configd(8))
chose for the operation denied access.
SCF_ERROR_CONNECTION_BROKEN
The connection to the repository was lost.
SCF_ERROR_DELETED
The instance has been deleted.
SCF_ERROR_HANDLE_MISMATCH
The instance and snapshot are not derived from the same handle.
SCF_ERROR_INTERNAL
An internal error occurred.
SCF_ERROR_INVALID_ARGUMENT
The value of the name argument is not a valid snapshot name.
SCF_ERROR_NO_RESOURCES
The server does not have the resources to complete the request.
SCF_ERROR_NOT_BOUND
The handle is not bound.
SCF_ERROR_NOT_FOUND
The snapshot specified by name was not found.
SCF_ERROR_NOT_SET
The instance is not set.
The scf_error(3SCF) function can be used to retrieve the error value.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ Interface StabilityCommitted _ MT-LevelSafe
SEE ALSO
libscf(3LIB), scf_error(3SCF), scf_iter_instance_snapshots(3SCF),
scf_snapshot_get_base_snaplevel(3SCF), attributes(7), smf(7)
Oracle Solaris 11.4 14 Aug 2017 scf_snapshot_create(3SCF)