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/* $OpenBSD: tty.c,v 1.4 2017/07/02 23:19:07 deraadt Exp $ */ |
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/* |
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* Copyright (c) 2013, Otto Moerbeek <otto@drijf.net> |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include <errno.h> |
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#include <signal.h> |
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#include <histedit.h> |
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#include <termios.h> |
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#include "extern.h" |
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struct termios ttysaved, ttyedit; |
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static int |
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settty(struct termios *t) |
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{ |
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int ret; |
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while ((ret = tcsetattr(0, TCSADRAIN, t)) == -1 && errno == EINTR) |
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continue; |
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return ret; |
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} |
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int |
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gettty(struct termios *t) |
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{ |
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int ret; |
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while ((ret = tcgetattr(0, t)) == -1 && errno == EINTR) |
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continue; |
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return ret; |
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} |
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/* ARGSUSED */ |
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void |
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tstpcont(int sig) |
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{ |
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int save_errno = errno; |
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if (sig == SIGTSTP) { |
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signal(SIGCONT, tstpcont); |
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gettty(&ttyedit); |
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settty(&ttysaved); |
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} else { |
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signal(SIGTSTP, tstpcont); |
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settty(&ttyedit); |
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} |
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signal(sig, SIG_DFL); |
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kill(0, sig); |
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errno = save_errno; |
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} |