Annotation of src/usr.bin/telnet/terminal.c, Revision 1.7
1.7 ! guenther 1: /* $OpenBSD: terminal.c,v 1.6 2003/06/03 02:56:18 millert Exp $ */
1.2 niklas 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.
1.6 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 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:
1.3 art 33: #include "telnet_locl.h"
1.1 deraadt 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: {
1.4 mpech 103: int n, n0, n1;
1.1 deraadt 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 {
1.3 art 111: n = TerminalWrite((char *)ttyoring.consume, n);
1.1 deraadt 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);
1.2 niklas 127: if (n1 > 0)
128: n += n1;
1.1 deraadt 129: }
130: ring_consumed(&ttyoring, n);
131: }
1.5 millert 132: if (n < 0) {
133: if (errno == EPIPE)
134: kill(0, SIGQUIT);
1.1 deraadt 135: return -1;
1.5 millert 136: }
1.1 deraadt 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:
1.3 art 167: if ((eight & 1) || my_want_state_is_will(TELOPT_BINARY))
1.1 deraadt 168: mode |= MODE_INBIN;
169:
1.3 art 170: if (eight & 2)
171: mode |= MODE_OUT8;
1.1 deraadt 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: {
1.4 mpech 195: int newmode;
1.1 deraadt 196:
197: newmode = getconnmode()|(force?MODE_FORCE:0);
198:
199: TerminalNewMode(newmode);
200: }
201:
202:
203: void
204: setcommandmode()
205: {
206: TerminalNewMode(-1);
207: }