scf_value_create

, scf_value_handle

, scf_value_reset

, scf_value_destroy

, scf_value_type

, scf_value_base_type

, scf_value_is_type

, scf_type_base_type

, scf_value_get_boolean

, scf_value_get_count

, scf_value_get_integer

, scf_value_get_time

, scf_value_get_astring

, scf_value_get_ustring

, scf_value_get_opaque

, scf_value_get_as_string

, scf_value_get_as_string_typed

, scf_value_set_boolean

, scf_value_set_count

, scf_value_set_integer

, scf_value_set_time

, scf_value_set_from_string

, scf_value_set_astring

, scf_value_set_ustring

, scf_value_set_opaque

- manipulate values in the Service Configuration Facility

Synopsis

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

scf_value_t *scf_value_create(scf_handle_t *h);

scf_handle_t *scf_value_handle(scf_value_t *v);

void scf_value_reset(scf_value_t *v);

void scf_value_destroy(scf_value_t *v);

int scf_value_type(scf_value_t *v);

int scf_value_base_type(scf_value_t *v);

int scf_value_is_type(scf_value_t *v, scf_type_t type);

int scf_type_base_type(scf_type_t type, scf_type_t *out);

int scf_value_get_boolean(scf_value_t *v, uint8_t *out);

int scf_value_get_count(scf_value_t *v, uint64_t *out);

int scf_value_get_integer(scf_value_t *v, int64_t *out);

int scf_value_get_time(scf_value_t *v, int64_t *seconds,
     int32_t *ns);

ssize_t scf_value_get_astring(scf_value_t *v, char *buf,
     size_t size);

ssize_t scf_value_get_ustring(scf_value_t *v, char *buf,
     size_t size);

ssize_t scf_value_get_opaque(scf_value_t *v, char *out,
     size_t len);

ssize_t scf_value_get_as_string(scf_value_t *v, char *buf,
     size_t size);

ssize_t scf_value_get_as_string_typed(scf_value_t *v,
     scf_type_t type, char *buf, size_t size);

void scf_value_set_boolean(scf_value_t *v, uint8_t in);

void scf_value_set_count(scf_value_t *v, uint64_t in);

void scf_value_set_integer(scf_value_t *v, int64_t in);

int scf_value_set_time(scf_value_t *v, int64_t seconds,
     int32_t ns);

int scf_value_set_from_string(scf_value_t *v, scf_type_t type,
     char *in);

int scf_value_set_astring(scf_value_t *v, const char *in);

int scf_value_set_ustring(scf_value_t *v, const char *in);

int scf_value_set_opaque(scf_value_t *v, void *in, size_t sz);

Description

The scf_value_create() function creates a new, reset scf_value_t that holds a single typed value. The value can be used only with the handle specified by h and objects associated with h.

The scf_value_reset() function resets the value to the uninitialized state. The scf_value_destroy() function deallocates the object.

The scf_value_type() function retrieves the type of the contents of v. The scf_value_is_type() function determines if a value is of a particular type or any of its subtypes. The scf_type_base_type() function returns the base type of type. The scf_value_base_type() function returns the true base type of the value (the highest type reachable from the value's type).

The scf_value_get_boolean(), scf_value_get_count(), scf_value_get_integer(), scf_value_get_time(), scf_value_get_astring(), scf_value_get_ustring(), and scf_value_get_opaque() functions read a particular type of value from v.

The scf_value_get_as_string() and scf_value_get_as_string_typed() functions convert the value to a string form. For scf_value_get_as_string_typed(), the value must be a reachable subtype of type.

The scf_value_set_boolean(), scf_value_set_count(), scf_value_set_integer(), scf_value_set_time(), scf_value_set_astring(), scf_value_set_ustring(), and scf_value_set_opaque() functions set v to a particular value of a particular type.

The scf_value_set_from_string() function is the inverse of scf_value_get_as_string(). It sets v to the value encoded in buf of type type.

The scf_value_set_*() functions will succeed on scf_value_t objects that have already been set.

Return Values

Upon successful completion, scf_value_create() returns a new, reset scf_value_t. Otherwise, it returns NULL.

Upon successful completion, scf_value_handle() returns the handle associated with v. Otherwise, it returns NULL.

The scf_value_base_type() function returns the base type of the value, or SCF_TYPE_INVALID on failure.

Upon successful completion, scf_value_type() returns the type of the value. Otherwise, it returns SCF_TYPE_INVALID.

Upon successful completion, scf_value_is_type(), scf_value_get_boolean(), scf_value_get_count(), scf_value_get_integer(), scf_value_get_time(), scf_value_set_time(), scf_value_set_from_string(), scf_value_set_astring(), scf_value_set_ustring(), and scf_value_set_opaque() return 0. Otherwise, they return -1.

Upon successful completion, scf_value_get_astring(), scf_value_get_ustring(), scf_value_get_as_string(), and scf_value_get_as_string_typed() return the length of the source string, not including the terminating null byte. Otherwise, they return -1.

Upon successful completion, scf_value_get_opaque() returns the number of bytes written. Otherwise, it returns -1.

Errors

The scf_value_create() function will fail if:

SCF_ERROR_HANDLE_DESTROYED

The handle associated with h has been destroyed.

SCF_ERROR_INVALID_ARGUMENT

The handle is NULL.

SCF_ERROR_NO_MEMORY

There is not enough memory to allocate an scf_value_t.

The scf_value_handle() function will fail if:

SCF_ERROR_HANDLE_DESTROYED

The handle associated with v has been destroyed.

The scf_value_set_time() function will fail if:

SCF_ERROR_INVALID_ARGUMENT

The nanoseconds field is not in the range 0 <= ns < 1,000,000,000.

The scf_type_base_type() function will fail if:

SCF_ERROR_INVALID_ARGUMENT

The type argument is not a valid type.

The scf_value_set_astring(), scf_value_set_ustring(), scf_value_set_opaque(), and scf_value_set_from_string() functions will fail if:

SCF_ERROR_INVALID_ARGUMENT

The in argument is not a valid value for the specified type or is longer than the maximum supported value length.

The scf_type_base_type(), scf_value_is_type(), and scf_value_get_as_string_typed() functions will fail if:

SCF_ERROR_INVALID_ARGUMENT

The type argument is not a valid type.

The scf_value_type(), scf_value_base_type(), scf_value_get_boolean(), scf_value_get_count(), scf_value_get_integer(), scf_value_get_time(), scf_value_get_astring(), scf_value_get_ustring(), scf_value_get_as_string(), andscf_value_get_as_string_typed() functions will fail if:

SCF_ERROR_NOT_SET

The v argument has not been set to a value.

The scf_value_get_boolean(), scf_value_get_count(), scf_value_get_integer(), scf_value_get_time(), scf_value_get_astring(), scf_value_get_ustring(), and scf_value_get_as_string_typed() functions will fail if:

SCF_ERROR_TYPE_MISMATCH

The requested type is not the same as the value's type and is not in the base-type chain.

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

Attributes

See attributes(5) for descriptions of the following attributes:

See Also

libscf(3LIB), scf_entry_add_value(3SCF), scf_error(3SCF), attributes(5)