#ifndef _TTYENT_H # include extern __typeof (getttyent) __getttyent __THROW; libc_hidden_proto (__getttyent) extern __typeof (setttyent) __setttyent __THROW; libc_hidden_proto (__setttyent) extern __typeof (endttyent) __endttyent __THROW; libc_hidden_proto (__endttyent) #endif