86  * Returns non-zero if given file is visible to given thread.
456 	int error, i, namelen, visible;  in pfs_lookup()  local
478 	/* check that parent directory is visible... */  in pfs_lookup()
563 	visible = pfs_visible(curthread, pn, pid, NULL);  in pfs_lookup()
564 	if (!visible) {  in pfs_lookup()
789 	int visible;  in pfs_iterate()  local
818 		visible = pfs_visible_proc(td, *pn, *p);  in pfs_iterate()
821 		visible = pfs_visible_proc(td, *pn, proc);  in pfs_iterate()
823 		visible = pn_vis(td, NULL, *pn);  in pfs_iterate()
825 	if (!visible)  in pfs_iterate()
890 		/* check if the directory is visible to the caller */  in pfs_readdir()