label_to_str - convert labels to human readable strings
cc [flag...] file... -ltsol [library...]
#include <tsol/label.h> int label_to_str(const m_label_t *label, char **string, const m_label_str_t conversion_type, uint_t flags);
label_to_str() is a simple function to convert various mandatory label types to human readable strings.
label is the mandatory label to convert. string points to memory that is allocated by label_to_str() that contains the converted string. The caller is responsible for calling free(3C) to free allocated memory.
The calling process must have mandatory read access to the resulting human readable string. Or the calling process must have the sys_trans_label privilege.
The conversion_type parameter controls the type of label conversion. Not all types of conversion are valid for all types of label:
Converts label to a human readable string based on its type.
Converts label to an internal text representation that is safe for storing in a public object. Internal conversions can later be parsed to their same value.
Converts label to a string that represents the color name that the administrator has associated with the label.
Converts label to a human readable string that is appropriate for use as the top and bottom label of banner and trailer pages in the Defense Intelligence Agency (DIA) encodings printed output schema.
Converts label to a human readable string that is appropriate for use as the banner page downgrade warning in the DIA encodings printed output schema.
Converts label to a human readable string that is appropriate for use as the banner page caveats section in the DIA encodings printed output schema.
Converts label to a human readable string that is appropriate for use as the banner page handling channels in the DIA encodings printed output schema.
The flags parameter provides a hint to the label conversion:
The default names are preferred.
Short names are preferred where defined.
Long names are preferred.
Upon successful completion, the label_to_str() function returns 0. Otherwise, -1 is returned, errno is set to indicate the error and the string pointer is set to NULL.
The label_to_str() function will fail if:
The system does not support label translations.
The physical limits of the system are exceeded by size bytes of memory which cannot be allocated.
See attributes(5) for descriptions of the following attributes:
The label_to_str() function is Committed. The returned string is Not-an-Interface and is dependent on the specific label_encodings file. The conversion type INTERNAL is Uncommitted, but is always accepted as input to str_to_label(3TSOL).
Conversion types that are relative to the DIA encodings schema are Standard. Standard is specified in label_encodings(4).
A number of these conversions rely on the DIA label encodings schema. They might not be valid for other label schemata.
The functionality described on this manual page is available only if the system is configured with Trusted Extensions.