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ACL_GET_QUALIFIER(3)     BSD Library Functions Manual     ACL_GET_QUALIFIER(3)

NAME
     acl_get_qualifier -- retrieve the qualifier from an ACL entry

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <sys/types.h>
     #include <sys/acl.h>

     void *
     acl_get_qualifier(acl_entry_t entry_d);

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

     If the value of the tag type in the ACL entry referred to by entry_d is ACL_EXTENDED_ALLOW or
     ACL_EXTENDED_DENY The value returned by acl_get_qualifier() will be a pointer to type guid_t.

     If the value of the tag type in the ACL entry referred to by entry_d is ACL_UNDEFINED_TAG, a tag type
     specified by POSIX.1e but not supported or an implementation-defined value for which a qualifier is not
     supported, then acl_get_qualifier() will return a value of (void *)NULL 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 acl_free() with void * as the argument.

RETURN VALUES
     The acl_get_qualifier() function returns a pointer to the allocated storage if successful; otherwise a
     NULL pointer is returned and the global variable errno is set to indicate the error.

ERRORS
     The acl_get_qualifier() fails if:

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

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

SEE ALSO
     acl(3), acl_create_entry(3), acl_free(3), acl_get_entry(3), acl_get_tag_type(3), acl_set_qualifier(3),
     acl_set_tag_type(3), posix1e(3)

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

AUTHORS
     Michael Smith
     Chris D. Faulhaber

BSD                             March 13, 2001                             BSD

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