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 stor-
age 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 man-
agement 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
Mac OS X 10.8 - Generated Sun Aug 26 10:19:41 CDT 2012