freebsd man page for acl_delete_entry_np

ACL_DELETE_ENTRY(3)					   BSD Library Functions Manual 				       ACL_DELETE_ENTRY(3)

NAME
     acl_delete_entry, acl_delete_entry_np -- delete an ACL entry from an ACL

LIBRARY
     Standard C Library (libc, -lc)

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

     int
     acl_delete_entry(acl_t acl, acl_entry_t entry_d);

     int
     acl_delete_entry_np(acl_t acl, int index);

DESCRIPTION
     The acl_delete_entry() function is a POSIX.1e call that removes the ACL entry entry_d from ACL acl.  The acl_delete_entry_np() function is a
     non-portable version that removes the ACL entry at position index from ACL acl.  Positions are numbered starting from zero, i.e. calling
     acl_delete_entry_np() with index argument equal to zero will remove the first ACL entry.

RETURN VALUES
     The acl_delete_entry() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to
     indicate the error.

ERRORS
     The acl_delete_entry() function fails if:

     [EINVAL]		Argument acl does not point to a valid ACL.  Argument entry_d is not a valid descriptor for an ACL entry in acl.  Argument
			index is out of bounds.

SEE ALSO
     acl(3), acl_copy_entry(3), acl_get_entry(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_delete_entry() function was added in FreeBSD 5.0.

AUTHORS
     The acl_delete_entry() function was written by Chris D. Faulhaber <jedgar@fxp.org>.

BSD
								   June 25, 2009							       BSD