Fix gcc80 -Wbool-operation warnings in fortune(6) and hack(6).
[dragonfly.git] / usr.bin / telnet / terminal.c
blob7231319324c558c259d7729dc821bdff8f6dadc0
1 /*
2 * Copyright (c) 1988, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
29 * @(#)terminal.c 8.2 (Berkeley) 2/16/95
30 * $FreeBSD: src/crypto/telnet/telnet/terminal.c,v 1.2.8.2 2002/04/13 10:59:08 markm Exp $
33 #include <arpa/telnet.h>
34 #include <sys/types.h>
35 #include <stdlib.h>
37 #include "ring.h"
39 #include "externs.h"
40 #include "types.h"
42 #ifdef ENCRYPTION
43 #include <libtelnet/encrypt.h>
44 #endif
46 Ring ttyoring, ttyiring;
47 unsigned char ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ];
49 int termdata; /* Debugging flag */
51 #ifdef USE_TERMIO
52 # ifndef VDISCARD
53 cc_t termFlushChar;
54 # endif
55 # ifndef VLNEXT
56 cc_t termLiteralNextChar;
57 # endif
58 # ifndef VSUSP
59 cc_t termSuspChar;
60 # endif
61 # ifndef VWERASE
62 cc_t termWerasChar;
63 # endif
64 # ifndef VREPRINT
65 cc_t termRprntChar;
66 # endif
67 # ifndef VSTART
68 cc_t termStartChar;
69 # endif
70 # ifndef VSTOP
71 cc_t termStopChar;
72 # endif
73 # ifndef VEOL
74 cc_t termForw1Char;
75 # endif
76 # ifndef VEOL2
77 cc_t termForw2Char;
78 # endif
79 # ifndef VSTATUS
80 cc_t termAytChar;
81 # endif
82 #else
83 cc_t termForw2Char;
84 cc_t termAytChar;
85 #endif
88 * initialize the terminal data structures.
91 void
92 init_terminal(void)
94 if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) {
95 exit(1);
97 if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) {
98 exit(1);
100 autoflush = TerminalAutoFlush();
104 * Send as much data as possible to the terminal.
106 * Return value:
107 * -1: No useful work done, data waiting to go out.
108 * 0: No data was waiting, so nothing was done.
109 * 1: All waiting data was written out.
110 * n: All data - n was written out.
114 ttyflush(int drop)
116 int n, n0, n1;
118 n0 = ring_full_count(&ttyoring);
119 if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) {
120 if (drop) {
121 TerminalFlushOutput();
122 /* we leave 'n' alone! */
123 } else {
124 n = TerminalWrite(ttyoring.consume, n);
127 if (n > 0) {
128 if (termdata && n) {
129 Dump('>', ttyoring.consume, n);
132 * If we wrote everything, and the full count is
133 * larger than what we wrote, then write the
134 * rest of the buffer.
136 if (n1 == n && n0 > n) {
137 n1 = n0 - n;
138 if (!drop)
139 n1 = TerminalWrite(ttyoring.bottom, n1);
140 if (n1 > 0)
141 n += n1;
143 ring_consumed(&ttyoring, n);
145 if (n < 0)
146 return -1;
147 if (n == n0) {
148 if (n0)
149 return -1;
150 return 0;
152 return n0 - n + 1;
157 * These routines decides on what the mode should be (based on the values
158 * of various global variables).
163 getconnmode(void)
165 extern int linemode;
166 int mode = 0;
167 #ifdef KLUDGELINEMODE
168 extern int kludgelinemode;
169 #endif
171 if (my_want_state_is_dont(TELOPT_ECHO))
172 mode |= MODE_ECHO;
174 if (localflow)
175 mode |= MODE_FLOW;
177 if (my_want_state_is_will(TELOPT_BINARY))
178 mode |= MODE_INBIN;
180 if (his_want_state_is_will(TELOPT_BINARY))
181 mode |= MODE_OUTBIN;
183 #ifdef KLUDGELINEMODE
184 if (kludgelinemode) {
185 if (my_want_state_is_dont(TELOPT_SGA)) {
186 mode |= (MODE_TRAPSIG|MODE_EDIT);
187 if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) {
188 mode &= ~MODE_ECHO;
191 return(mode);
193 #endif
194 if (my_want_state_is_will(TELOPT_LINEMODE))
195 mode |= linemode;
196 return(mode);
199 void
200 setconnmode(int force)
202 #ifdef ENCRYPTION
203 static int enc_passwd = 0;
204 #endif /* ENCRYPTION */
205 int newmode;
207 newmode = getconnmode()|(force?MODE_FORCE:0);
209 TerminalNewMode(newmode);
211 #ifdef ENCRYPTION
212 if ((newmode & (MODE_ECHO|MODE_EDIT)) == MODE_EDIT) {
213 if (my_want_state_is_will(TELOPT_ENCRYPT)
214 && (enc_passwd == 0) && !encrypt_output) {
215 encrypt_request_start(0, 0);
216 enc_passwd = 1;
218 } else {
219 if (enc_passwd) {
220 encrypt_request_end();
221 enc_passwd = 0;
224 #endif /* ENCRYPTION */
228 void
229 setcommandmode(void)
231 TerminalNewMode(-1);