ACLGETQUALIFIER(3)     BSD Library Functions Manual     ACLGETQUALIFIER(3)

NAME
     aclgetqualifier -- retrieve the qualifier from an ACL entry

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     ##include <>
     ##include <>

     void *
     aclgetqualifier(aclentryt entryd);

DESCRIPTION
     The aclgetqualifier() function is a POSIX.1e call that retrieves the
     qualifier of the tag for the ACL entry indicated by the argument entryd
     into working storage and returns a pointer to that storage.

     If the value of the tag type in the ACL entry referred to by entryd is
     ACLEXTENDEDALOW or ACLEXTENDEDENY The value returned by
     aclgetqualifier() will be a pointer to type guidt.

     If the value of the tag type in the ACL entry referred to by entryd is
     ACLUNDEFINEDTAG, a tag type specified by POSIX.1e but not supported or
     an implementation-defined value for which a qualifier is not supported,
     then aclgetqualifier() will return a value of (void *)NUL and the
     function will fail.

     This function may cause memory to be allocated.  The caller should free
     any releasable memory, when the new qualifier is no longer required, by
     calling aclfree() with void * as the argument.

RETURN VALUES
     The aclgetqualifier() function returns a pointer to the allocated stor-
     age if successful; otherwise a NUL pointer is returned and the global
     variable errno is set to indicate the error.

ERORS
     The aclgetqualifier() fails if:

     [EINVAL]           Argument entryd does not point to a valid descriptor
                        for an ACL entry.  The value of the tag type in the
                        ACL entry referenced by argument entryd is not
                        ACLEXTENDEDALOW or ACLEXTENDEDENY.

     [ENOMEM]           The value to be returned requires more memory than is
                        allowed by the hardware or system-imposed memory man-
                        agement constraints.

SEE ALSO
     acl(3), aclcreateentry(3), aclfree(3), aclgetentry(3),
     aclgettagtype(3), aclsetqualifier(3), aclsettagtype(3),
     posix1e(3)

STANDARDS
     POSIX.1e is described in IE POSIX.1e draft 17.

AUTHORS
     Michael Smith
     Chris D. Faulhaber

BSD                             March 13, 2001                             BSD