terminal.c revision 1.5
1 /* $NetBSD: terminal.c,v 1.5 1996/02/28 21:04:17 thorpej 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 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)terminal.c 8.2 (Berkeley) 2/16/95"; 39 #else 40 static char rcsid[] = "$NetBSD: terminal.c,v 1.5 1996/02/28 21:04:17 thorpej Exp $"; 41 #endif 42 #endif /* not lint */ 43 44 #include <arpa/telnet.h> 45 #include <sys/types.h> 46 47 #include "ring.h" 48 49 #include "externs.h" 50 #include "types.h" 51 52 Ring ttyoring, ttyiring; 53 unsigned char ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ]; 54 55 int termdata; /* Debugging flag */ 56 57 #ifdef USE_TERMIO 58 # ifndef VDISCARD 59 cc_t termFlushChar; 60 # endif 61 # ifndef VLNEXT 62 cc_t termLiteralNextChar; 63 # endif 64 # ifndef VSUSP 65 cc_t termSuspChar; 66 # endif 67 # ifndef VWERASE 68 cc_t termWerasChar; 69 # endif 70 # ifndef VREPRINT 71 cc_t termRprntChar; 72 # endif 73 # ifndef VSTART 74 cc_t termStartChar; 75 # endif 76 # ifndef VSTOP 77 cc_t termStopChar; 78 # endif 79 # ifndef VEOL 80 cc_t termForw1Char; 81 # endif 82 # ifndef VEOL2 83 cc_t termForw2Char; 84 # endif 85 # ifndef VSTATUS 86 cc_t termAytChar; 87 # endif 88 #else 89 cc_t termForw2Char; 90 cc_t termAytChar; 91 #endif 92 93 /* 94 * initialize the terminal data structures. 95 */ 96 97 void 98 init_terminal() 99 { 100 if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) { 101 exit(1); 102 } 103 if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) { 104 exit(1); 105 } 106 autoflush = TerminalAutoFlush(); 107 } 108 109 110 /* 111 * Send as much data as possible to the terminal. 112 * 113 * Return value: 114 * -1: No useful work done, data waiting to go out. 115 * 0: No data was waiting, so nothing was done. 116 * 1: All waiting data was written out. 117 * n: All data - n was written out. 118 */ 119 120 121 int 122 ttyflush(drop) 123 int drop; 124 { 125 register int n, n0, n1; 126 127 n0 = ring_full_count(&ttyoring); 128 if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) { 129 if (drop) { 130 TerminalFlushOutput(); 131 /* we leave 'n' alone! */ 132 } else { 133 n = TerminalWrite(ttyoring.consume, n); 134 } 135 } 136 if (n > 0) { 137 if (termdata && n) { 138 Dump('>', ttyoring.consume, n); 139 } 140 /* 141 * If we wrote everything, and the full count is 142 * larger than what we wrote, then write the 143 * rest of the buffer. 144 */ 145 if (n1 == n && n0 > n) { 146 n1 = n0 - n; 147 if (!drop) 148 n1 = TerminalWrite(ttyoring.bottom, n1); 149 if (n1 > 0) 150 n += n1; 151 } 152 ring_consumed(&ttyoring, n); 153 } 154 if (n < 0) 155 return -1; 156 if (n == n0) { 157 if (n0) 158 return -1; 159 return 0; 160 } 161 return n0 - n + 1; 162 } 163 164 165 /* 167 * These routines decides on what the mode should be (based on the values 168 * of various global variables). 169 */ 170 171 172 int 173 getconnmode() 174 { 175 extern int linemode; 176 int mode = 0; 177 #ifdef KLUDGELINEMODE 178 extern int kludgelinemode; 179 #endif 180 181 if (In3270) 182 return(MODE_FLOW); 183 184 if (my_want_state_is_dont(TELOPT_ECHO)) 185 mode |= MODE_ECHO; 186 187 if (localflow) 188 mode |= MODE_FLOW; 189 190 if (my_want_state_is_will(TELOPT_BINARY)) 191 mode |= MODE_INBIN; 192 193 if (his_want_state_is_will(TELOPT_BINARY)) 194 mode |= MODE_OUTBIN; 195 196 #ifdef KLUDGELINEMODE 197 if (kludgelinemode) { 198 if (my_want_state_is_dont(TELOPT_SGA)) { 199 mode |= (MODE_TRAPSIG|MODE_EDIT); 200 if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) { 201 mode &= ~MODE_ECHO; 202 } 203 } 204 return(mode); 205 } 206 #endif 207 if (my_want_state_is_will(TELOPT_LINEMODE)) 208 mode |= linemode; 209 return(mode); 210 } 211 212 void 213 setconnmode(force) 214 int force; 215 { 216 register int newmode; 217 218 newmode = getconnmode()|(force?MODE_FORCE:0); 219 220 TerminalNewMode(newmode); 221 222 223 } 224 225 226 void 227 setcommandmode() 228 { 229 TerminalNewMode(-1); 230 } 231
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