1 /* $OpenBSD: terminal.c,v 1.7 2014/07/19 23:50:38 guenther Exp $ */ 2 /* $NetBSD: terminal.c,v 1.5 1996/02/28 21:04:17 thorpej Exp $ */ 3 4 /* 5 * Copyright (c) 1988, 1990, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include "telnet_locl.h" 34 35 Ring ttyoring, ttyiring; 36 unsigned char ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ]; 37 38 int termdata; /* Debugging flag */ 39 40 # ifndef VDISCARD 41 cc_t termFlushChar; 42 # endif 43 # ifndef VLNEXT 44 cc_t termLiteralNextChar; 45 # endif 46 # ifndef VSUSP 47 cc_t termSuspChar; 48 # endif 49 # ifndef VWERASE 50 cc_t termWerasChar; 51 # endif 52 # ifndef VREPRINT 53 cc_t termRprntChar; 54 # endif 55 # ifndef VSTART 56 cc_t termStartChar; 57 # endif 58 # ifndef VSTOP 59 cc_t termStopChar; 60 # endif 61 # ifndef VEOL 62 cc_t termForw1Char; 63 # endif 64 # ifndef VEOL2 65 cc_t termForw2Char; 66 # endif 67 # ifndef VSTATUS 68 cc_t termAytChar; 69 # endif 70 71 /* 72 * initialize the terminal data structures. 73 */ 74 75 void 76 init_terminal() 77 { 78 if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) { 79 exit(1); 80 } 81 if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) { 82 exit(1); 83 } 84 autoflush = TerminalAutoFlush(); 85 } 86 87 88 /* 89 * Send as much data as possible to the terminal. 90 * 91 * Return value: 92 * -1: No useful work done, data waiting to go out. 93 * 0: No data was waiting, so nothing was done. 94 * 1: All waiting data was written out. 95 * n: All data - n was written out. 96 */ 97 98 99 int 100 ttyflush(drop) 101 int drop; 102 { 103 int n, n0, n1; 104 105 n0 = ring_full_count(&ttyoring); 106 if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) { 107 if (drop) { 108 TerminalFlushOutput(); 109 /* we leave 'n' alone! */ 110 } else { 111 n = TerminalWrite((char *)ttyoring.consume, n); 112 } 113 } 114 if (n > 0) { 115 if (termdata && n) { 116 Dump('>', ttyoring.consume, n); 117 } 118 /* 119 * If we wrote everything, and the full count is 120 * larger than what we wrote, then write the 121 * rest of the buffer. 122 */ 123 if (n1 == n && n0 > n) { 124 n1 = n0 - n; 125 if (!drop) 126 n1 = TerminalWrite(ttyoring.bottom, n1); 127 if (n1 > 0) 128 n += n1; 129 } 130 ring_consumed(&ttyoring, n); 131 } 132 if (n < 0) { 133 if (errno == EPIPE) 134 kill(0, SIGQUIT); 135 return -1; 136 } 137 if (n == n0) { 138 if (n0) 139 return -1; 140 return 0; 141 } 142 return n0 - n + 1; 143 } 144 145 146 /* 147 * These routines decides on what the mode should be (based on the values 148 * of various global variables). 149 */ 150 151 152 int 153 getconnmode() 154 { 155 extern int linemode; 156 int mode = 0; 157 #ifdef KLUDGELINEMODE 158 extern int kludgelinemode; 159 #endif 160 161 if (my_want_state_is_dont(TELOPT_ECHO)) 162 mode |= MODE_ECHO; 163 164 if (localflow) 165 mode |= MODE_FLOW; 166 167 if ((eight & 1) || my_want_state_is_will(TELOPT_BINARY)) 168 mode |= MODE_INBIN; 169 170 if (eight & 2) 171 mode |= MODE_OUT8; 172 if (his_want_state_is_will(TELOPT_BINARY)) 173 mode |= MODE_OUTBIN; 174 175 #ifdef KLUDGELINEMODE 176 if (kludgelinemode) { 177 if (my_want_state_is_dont(TELOPT_SGA)) { 178 mode |= (MODE_TRAPSIG|MODE_EDIT); 179 if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) { 180 mode &= ~MODE_ECHO; 181 } 182 } 183 return(mode); 184 } 185 #endif 186 if (my_want_state_is_will(TELOPT_LINEMODE)) 187 mode |= linemode; 188 return(mode); 189 } 190 191 void 192 setconnmode(force) 193 int force; 194 { 195 int newmode; 196 197 newmode = getconnmode()|(force?MODE_FORCE:0); 198 199 TerminalNewMode(newmode); 200 } 201 202 203 void 204 setcommandmode() 205 { 206 TerminalNewMode(-1); 207 } 208