/* $OpenBSD: tty.c,v 1.1 2013/09/19 16:12:01 otto Exp $ */ /* * Copyright (c) 2013, Otto Moerbeek * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #include "extern.h" struct termios ttysaved, ttyedit; int settty(struct termios *t) { int ret; while ((ret = tcsetattr(0, TCSADRAIN, t) == -1) && errno == EINTR) continue; return ret; } int gettty(struct termios *t) { int ret; while ((ret = tcgetattr(0, t) == -1) && errno == EINTR) continue; return ret; } /* ARGSUSED */ void tstpcont(int sig) { int save_errno = errno; if (sig == SIGTSTP) { signal(SIGCONT, tstpcont); gettty(&ttyedit); settty(&ttysaved); } else { signal(SIGTSTP, tstpcont); settty(&ttyedit); } signal(sig, SIG_DFL); kill(0, sig); errno = save_errno; }