ACL_GET_QUALIFIER(3) | Library Functions Manual | ACL_GET_QUALIFIER(3) |
acl_get_qualifier
—
retrieve the qualifier from an ACL entry
Standard C Library (libc, -lc)
#include
<sys/types.h>
#include <sys/acl.h>
void *
acl_get_qualifier
(acl_entry_t
entry_d);
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.
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.
The acl_get_qualifier
() fails if:
EINVAL
]ACL_EXTENDED_ALLOW
or
ACL_EXTENDED_DENY
.ENOMEM
]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)
POSIX.1e is described in IEEE POSIX.1e draft 17.
Michael Smith
Chris D. Faulhaber
March 13, 2001 | macOS 14.6 |