acl_get_entry(3) BSD Library Functions Manual acl_get_entry(3)
NAME
acl_get_entry -- retrieve an ACL entry from an ACL
LIBRARY
Standard C Library (libc, -lc)
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
The acl_get_entry() function is a POSIX.1e call that retrieves a descrip-
tor 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 successfull 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.
The caller may also set entry_id to the index of the desired entry within
the ACL. This is a non-portable extension. A subsequent call with
entry_id set to ACL_NEXT_ENTRY will return the entry following the previ-
ously nominated entry and so forth.
RETURN VALUES
If the acl_get_entry() function successfully obtains an ACL entry, a
value of 0 is returned. 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_ENTRY, ACL_NEXT_ENTRY or
a valid entry index.
[EINVAL] 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().
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.
AUTHORS
Michael Smith
Chris D. Faulhaber
BSD April 13, 2001 BSD
Mac OS X 10.8 - Generated Sun Aug 26 09:52:34 CDT 2012