osx man page for acl_add_flag_np

ACL_ADD_FLAG_NP(3)					   BSD Library Functions Manual 					ACL_ADD_FLAG_NP(3)

NAME
     acl_add_flag_np -- add flags to an flag set

LIBRARY
     Standard C Library (libc, -lc)

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

     int
     acl_add_flag_np(acl_flagset_t flagset_d, acl_flag_t flag);

DESCRIPTION
     The acl_add_flag_np() function is a nonstandard extension that adds the flag contained in flag to the flag set flagset_d.

     Note: it is not considered an error to attempt to add flags that already exist in the flag set.

RETURN VALUES
     The acl_add_flags_np() 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_add_flags_np() function fails if:

     [EINVAL]		Argument flagset_d is not a valid descriptor for a flag set.  Argument flag does not contain an acl_flag_t value valid for
			the flagset flagset_d.

SEE ALSO
     acl(3), acl_clear_entry_flagset_np(3), acl_delete_entry_flag_np(3), acl_get_entry_flagset_np(3), acl_set_entry_permset_np(3), posix1e(3)

AUTHORS
     Michael Smith
     Chris D Fulhaber

BSD
								  March 10, 2001							       BSD