NAME
acl_get_entry —
retrieve an ACL entry from an
ACL
LIBRARY
library “libc”
SYNOPSIS
#include
<sys/types.h>
#include <sys/acl.h>
int
acl_get_entry(acl_t
acl, int entry_id,
acl_entry_t
*entry_p);
DESCRIPTION
Theacl_get_entry()
function is a POSIX.1e call that retrieves a descriptor for an ACL entry
specified by the argument entry_d within the ACL
indicated by the argument acl.
If the value of
entry_id is ACL_FIRST_ENTRY,
then the function will return in entry_p a descriptor
for the first ACL entry within acl. If a call is made
to
acl_get_entry()
with entry_id set to
ACL_NEXT_ENTRY when there has not been either an
initial successful call to acl_get_entry(), or a
previous successful call to
acl_create_entry(),
acl_delete_entry(),
acl_dup(),
acl_from_text(),
acl_get_fd(),
acl_get_file(),
acl_set_fd(),
acl_set_file(),
or
acl_valid(),
then the result is unspecified.
RETURN VALUES
If the acl_get_entry() function
successfully obtains an ACL entry, a value of 1 is returned. If the ACL has
no ACL entries, the acl_get_entry() returns a value
of 0. If the value of entry_id is
ACL_NEXT_ENTRY and the last ACL entry in the ACL has
already been returned by a previous call to
acl_get_entry(), a value of 0 will be returned until
a successful call with entry_id of
ACL_FIRST_ENTRY is made. Otherwise, a value of -1
will be returned and the global variable errno will be
set to indicate the error.
ERRORS
The acl_get_entry() fails if:
- [
EINVAL] - Argument acl does not point to a valid ACL. Argument
entry_id is neither
ACL_FIRST_ENTRYnorACL_NEXT_ENTRY.
SEE ALSO
acl(3), acl_calc_mask(3), acl_create_entry(3), acl_delete_entry(3), acl_dup(3), acl_from_text(3), acl_get_fd(3), acl_get_file(3), acl_init(3), acl_set_fd(3), acl_set_file(3), acl_valid(3), posix1e(3)
STANDARDS
POSIX.1e is described in IEEE POSIX.1e draft 17.
HISTORY
POSIX.1e support was introduced in FreeBSD
4.0. The acl_get_entry() function was added
in FreeBSD 5.0.
AUTHORS
The acl_get_entry() function was written
by Chris D. Faulhaber
<jedgar@fxp.org>.