terminal.c revision 1.6
1 /* $NetBSD: terminal.c,v 1.6 1998/02/27 10:44:14 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)terminal.c 8.2 (Berkeley) 2/16/95"; 40 #else 41 __RCSID("$NetBSD: terminal.c,v 1.6 1998/02/27 10:44:14 christos Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <arpa/telnet.h> 46 #include <sys/types.h> 47 48 #include "ring.h" 49 50 #include "externs.h" 51 #include "types.h" 52 53 Ring ttyoring, ttyiring; 54 unsigned char ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ]; 55 56 int termdata; /* Debugging flag */ 57 58 #ifdef USE_TERMIO 59 # ifndef VDISCARD 60 cc_t termFlushChar; 61 # endif 62 # ifndef VLNEXT 63 cc_t termLiteralNextChar; 64 # endif 65 # ifndef VSUSP 66 cc_t termSuspChar; 67 # endif 68 # ifndef VWERASE 69 cc_t termWerasChar; 70 # endif 71 # ifndef VREPRINT 72 cc_t termRprntChar; 73 # endif 74 # ifndef VSTART 75 cc_t termStartChar; 76 # endif 77 # ifndef VSTOP 78 cc_t termStopChar; 79 # endif 80 # ifndef VEOL 81 cc_t termForw1Char; 82 # endif 83 # ifndef VEOL2 84 cc_t termForw2Char; 85 # endif 86 # ifndef VSTATUS 87 cc_t termAytChar; 88 # endif 89 #else 90 cc_t termForw2Char; 91 cc_t termAytChar; 92 #endif 93 94 /* 95 * initialize the terminal data structures. 96 */ 97 98 void 99 init_terminal() 100 { 101 if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) { 102 exit(1); 103 } 104 if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) { 105 exit(1); 106 } 107 autoflush = TerminalAutoFlush(); 108 } 109 110 111 /* 112 * Send as much data as possible to the terminal. 113 * 114 * Return value: 115 * -1: No useful work done, data waiting to go out. 116 * 0: No data was waiting, so nothing was done. 117 * 1: All waiting data was written out. 118 * n: All data - n was written out. 119 */ 120 121 122 int 123 ttyflush(drop) 124 int drop; 125 { 126 register int n, n0, n1; 127 128 n0 = ring_full_count(&ttyoring); 129 if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) { 130 if (drop) { 131 TerminalFlushOutput(); 132 /* we leave 'n' alone! */ 133 } else { 134 n = TerminalWrite(ttyoring.consume, n); 135 } 136 } 137 if (n > 0) { 138 if (termdata && n) { 139 Dump('>', ttyoring.consume, n); 140 } 141 /* 142 * If we wrote everything, and the full count is 143 * larger than what we wrote, then write the 144 * rest of the buffer. 145 */ 146 if (n1 == n && n0 > n) { 147 n1 = n0 - n; 148 if (!drop) 149 n1 = TerminalWrite(ttyoring.bottom, n1); 150 if (n1 > 0) 151 n += n1; 152 } 153 ring_consumed(&ttyoring, n); 154 } 155 if (n < 0) 156 return -1; 157 if (n == n0) { 158 if (n0) 159 return -1; 160 return 0; 161 } 162 return n0 - n + 1; 163 } 164 165 166 /* 168 * These routines decides on what the mode should be (based on the values 169 * of various global variables). 170 */ 171 172 173 int 174 getconnmode() 175 { 176 extern int linemode; 177 int mode = 0; 178 #ifdef KLUDGELINEMODE 179 extern int kludgelinemode; 180 #endif 181 182 if (In3270) 183 return(MODE_FLOW); 184 185 if (my_want_state_is_dont(TELOPT_ECHO)) 186 mode |= MODE_ECHO; 187 188 if (localflow) 189 mode |= MODE_FLOW; 190 191 if (my_want_state_is_will(TELOPT_BINARY)) 192 mode |= MODE_INBIN; 193 194 if (his_want_state_is_will(TELOPT_BINARY)) 195 mode |= MODE_OUTBIN; 196 197 #ifdef KLUDGELINEMODE 198 if (kludgelinemode) { 199 if (my_want_state_is_dont(TELOPT_SGA)) { 200 mode |= (MODE_TRAPSIG|MODE_EDIT); 201 if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) { 202 mode &= ~MODE_ECHO; 203 } 204 } 205 return(mode); 206 } 207 #endif 208 if (my_want_state_is_will(TELOPT_LINEMODE)) 209 mode |= linemode; 210 return(mode); 211 } 212 213 void 214 setconnmode(force) 215 int force; 216 { 217 register int newmode; 218 219 newmode = getconnmode()|(force?MODE_FORCE:0); 220 221 TerminalNewMode(newmode); 222 223 224 } 225 226 227 void 228 setcommandmode() 229 { 230 TerminalNewMode(-1); 231 } 232
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