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NetBSD 6.1.5 - man page for extattr_string_to_namespace (netbsd section 3)

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EXTATTR_NAMESPACE_TO_STRING(3)	   BSD Library Functions Manual    EXTATTR_NAMESPACE_TO_STRING(3)

NAME
     extattr_namespace_to_string, extattr_string_to_namespace -- convert an extended attribute
     namespace identifier to a string and vice versa

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <sys/extattr.h>

     int
     extattr_namespace_to_string(int attrnamespace, char **string);

     int
     extattr_string_to_namespace(const char *string, int *attrnamespace);

DESCRIPTION
     The extattr_namespace_to_string() function converts a VFS extended attribute identifier to a
     human-readable string.  The extattr_string_to_namespace() converts a human-readable string
     representing a namespace to a namespace identifier.  Although a file system may implement
     arbitrary namespaces, these functions only support the EXTATTR_NAMESPACE_USER (``user'') and
     EXTATTR_NAMESPACE_SYSTEM (``system'') namespaces, which are defined in extattr(9).

     These functions are meant to be used in error reporting and other interactive tasks.  For
     example, instead of printing the integer identifying an extended attribute in an error mes-
     sage, a program might use extattr_namespace_to_string() to obtain a human-readable represen-
     tation.  Likewise, instead of requiring a user to enter the integer representing a names-
     pace, an interactive program might ask for a name and use extattr_string_to_namespace() to
     get the desired identifier.

RETURN VALUES
     If any of the calls are unsuccessful, the value -1 is returned and the global variable errno
     is set to indicate the error.

ERRORS
     [EINVAL]		The requested namespace could not be identified.

SEE ALSO
     getextattr(1), extattr_get_file(2), extattr_copy_file(3), extattr(9)

HISTORY
     Extended attribute support was developed as part of the TrustedBSD Project, and introduced
     in FreeBSD 5.0 and NetBSD 3.0.  It was developed to support security extensions requiring
     additional labels to be associated with each file or directory.

BSD					December 16, 2011				      BSD
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