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/* $OpenBSD: terminal.c,v 1.13 2014/07/22 07:30:24 jsg Exp $ */ |
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/* $NetBSD: terminal.c,v 1.5 1996/02/28 21:04:17 thorpej Exp $ */ |
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/* |
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* Copyright (c) 1988, 1990, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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#include "telnet_locl.h" |
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#include <arpa/telnet.h> |
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#include <errno.h> |
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#include <unistd.h> |
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Ring ttyoring, ttyiring; |
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unsigned char ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ]; |
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int termdata; /* Debugging flag */ |
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# ifndef VDISCARD |
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cc_t termFlushChar; |
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# endif |
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# ifndef VLNEXT |
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cc_t termLiteralNextChar; |
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# endif |
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# ifndef VWERASE |
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cc_t termWerasChar; |
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# endif |
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# ifndef VREPRINT |
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cc_t termRprntChar; |
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# endif |
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# ifndef VSTART |
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cc_t termStartChar; |
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# endif |
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# ifndef VSTOP |
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cc_t termStopChar; |
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# endif |
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# ifndef VEOL |
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cc_t termForw1Char; |
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# endif |
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# ifndef VEOL2 |
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cc_t termForw2Char; |
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# endif |
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# ifndef VSTATUS |
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cc_t termAytChar; |
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# endif |
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/* |
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* initialize the terminal data structures. |
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*/ |
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void |
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init_terminal(void) |
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{ |
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struct termios tc; |
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ring_init(&ttyoring, ttyobuf, sizeof ttyobuf); |
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ring_init(&ttyiring, ttyibuf, sizeof ttyibuf); |
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tcgetattr(0, &tc); |
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autoflush = (tc.c_lflag & NOFLSH) == 0; |
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} |
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/* |
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* Send as much data as possible to the terminal. |
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* |
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* Return value: |
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* -1: No useful work done, data waiting to go out. |
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* 0: No data was waiting, so nothing was done. |
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* 1: All waiting data was written out. |
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* n: All data - n was written out. |
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*/ |
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int |
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ttyflush(int drop) |
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{ |
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int n, n0, n1; |
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n0 = ring_full_count(&ttyoring); |
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if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) { |
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if (drop) { |
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tcflush(fileno(stdout), TCOFLUSH); |
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/* we leave 'n' alone! */ |
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} else { |
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n = write(tout, ttyoring.consume, n); |
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} |
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} |
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if (n > 0) { |
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if (termdata && n) { |
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Dump('>', ttyoring.consume, n); |
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} |
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/* |
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* If we wrote everything, and the full count is |
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* larger than what we wrote, then write the |
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* rest of the buffer. |
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*/ |
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if (n1 == n && n0 > n) { |
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n1 = n0 - n; |
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if (!drop) |
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n1 = write(tout, ttyoring.bottom, n1); |
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if (n1 > 0) |
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n += n1; |
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} |
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ring_consumed(&ttyoring, n); |
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} |
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if (n < 0) { |
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if (errno == EPIPE) |
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kill(0, SIGQUIT); |
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return -1; |
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} |
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if (n == n0) { |
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if (n0) |
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return -1; |
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return 0; |
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} |
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return n0 - n + 1; |
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} |
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/* |
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* These routines decides on what the mode should be (based on the values |
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* of various global variables). |
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*/ |
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int |
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getconnmode(void) |
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{ |
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int mode = 0; |
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if (my_want_state_is_dont(TELOPT_ECHO)) |
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mode |= MODE_ECHO; |
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if (localflow) |
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mode |= MODE_FLOW; |
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if ((eight & 1) || my_want_state_is_will(TELOPT_BINARY)) |
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mode |= MODE_INBIN; |
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if (eight & 2) |
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mode |= MODE_OUT8; |
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if (his_want_state_is_will(TELOPT_BINARY)) |
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mode |= MODE_OUTBIN; |
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#ifdef KLUDGELINEMODE |
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if (kludgelinemode) { |
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if (my_want_state_is_dont(TELOPT_SGA)) { |
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mode |= (MODE_TRAPSIG|MODE_EDIT); |
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if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) { |
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mode &= ~MODE_ECHO; |
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} |
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} |
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return(mode); |
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} |
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#endif |
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if (my_want_state_is_will(TELOPT_LINEMODE)) |
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mode |= linemode; |
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return(mode); |
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} |
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void |
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setconnmode(int force) |
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{ |
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int newmode; |
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newmode = getconnmode()|(force?MODE_FORCE:0); |
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TerminalNewMode(newmode); |
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} |
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void |
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setcommandmode(void) |
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{ |
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TerminalNewMode(-1); |
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} |