Annotation of src/usr.bin/telnet/terminal.c, Revision 1.2
1.2 ! niklas 1: /* $OpenBSD$ */
! 2: /* $NetBSD: terminal.c,v 1.5 1996/02/28 21:04:17 thorpej Exp $ */
! 3:
1.1 deraadt 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. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #ifndef lint
1.2 ! niklas 38: #if 0
! 39: static char sccsid[] = "@(#)terminal.c 8.2 (Berkeley) 2/16/95";
! 40: static char rcsid[] = "$NetBSD: terminal.c,v 1.5 1996/02/28 21:04:17 thorpej Exp $";
! 41: #else
! 42: static char rcsid[] = "$OpenBSD$";
! 43: #endif
1.1 deraadt 44: #endif /* not lint */
45:
46: #include <arpa/telnet.h>
47: #include <sys/types.h>
48:
49: #include "ring.h"
50:
51: #include "externs.h"
52: #include "types.h"
53:
54: Ring ttyoring, ttyiring;
55: unsigned char ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ];
56:
57: int termdata; /* Debugging flag */
58:
59: #ifdef USE_TERMIO
60: # ifndef VDISCARD
61: cc_t termFlushChar;
62: # endif
63: # ifndef VLNEXT
64: cc_t termLiteralNextChar;
65: # endif
66: # ifndef VSUSP
67: cc_t termSuspChar;
68: # endif
69: # ifndef VWERASE
70: cc_t termWerasChar;
71: # endif
72: # ifndef VREPRINT
73: cc_t termRprntChar;
74: # endif
75: # ifndef VSTART
76: cc_t termStartChar;
77: # endif
78: # ifndef VSTOP
79: cc_t termStopChar;
80: # endif
81: # ifndef VEOL
82: cc_t termForw1Char;
83: # endif
84: # ifndef VEOL2
85: cc_t termForw2Char;
86: # endif
87: # ifndef VSTATUS
88: cc_t termAytChar;
89: # endif
90: #else
91: cc_t termForw2Char;
92: cc_t termAytChar;
93: #endif
94:
95: /*
96: * initialize the terminal data structures.
97: */
98:
99: void
100: init_terminal()
101: {
102: if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) {
103: exit(1);
104: }
105: if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) {
106: exit(1);
107: }
108: autoflush = TerminalAutoFlush();
109: }
110:
111:
112: /*
113: * Send as much data as possible to the terminal.
114: *
115: * Return value:
116: * -1: No useful work done, data waiting to go out.
117: * 0: No data was waiting, so nothing was done.
118: * 1: All waiting data was written out.
119: * n: All data - n was written out.
120: */
121:
122:
123: int
124: ttyflush(drop)
125: int drop;
126: {
127: register int n, n0, n1;
128:
129: n0 = ring_full_count(&ttyoring);
130: if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) {
131: if (drop) {
132: TerminalFlushOutput();
133: /* we leave 'n' alone! */
134: } else {
135: n = TerminalWrite(ttyoring.consume, n);
136: }
137: }
138: if (n > 0) {
139: if (termdata && n) {
140: Dump('>', ttyoring.consume, n);
141: }
142: /*
143: * If we wrote everything, and the full count is
144: * larger than what we wrote, then write the
145: * rest of the buffer.
146: */
147: if (n1 == n && n0 > n) {
148: n1 = n0 - n;
149: if (!drop)
150: n1 = TerminalWrite(ttyoring.bottom, n1);
1.2 ! niklas 151: if (n1 > 0)
! 152: n += n1;
1.1 deraadt 153: }
154: ring_consumed(&ttyoring, n);
155: }
156: if (n < 0)
157: return -1;
158: if (n == n0) {
159: if (n0)
160: return -1;
161: return 0;
162: }
163: return n0 - n + 1;
164: }
165:
166:
167: /*
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: }
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