1 |
|
|
/* $OpenBSD: terminal.c,v 1.14 2017/07/07 09:14:26 fcambus Exp $ */ |
2 |
|
|
/* $NetBSD: terminal.c,v 1.5 1996/02/28 21:04:17 thorpej Exp $ */ |
3 |
|
|
|
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. Neither the name of the University nor the names of its contributors |
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 |
|
|
|
33 |
|
|
#include "telnet_locl.h" |
34 |
|
|
|
35 |
|
|
#include <arpa/telnet.h> |
36 |
|
|
#include <errno.h> |
37 |
|
|
#include <unistd.h> |
38 |
|
|
|
39 |
|
|
Ring ttyoring, ttyiring; |
40 |
|
|
unsigned char ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ]; |
41 |
|
|
|
42 |
|
|
int termdata; /* Debugging flag */ |
43 |
|
|
|
44 |
|
|
/* |
45 |
|
|
* initialize the terminal data structures. |
46 |
|
|
*/ |
47 |
|
|
|
48 |
|
|
void |
49 |
|
|
init_terminal(void) |
50 |
|
|
{ |
51 |
|
|
struct termios tc; |
52 |
|
|
|
53 |
|
|
ring_init(&ttyoring, ttyobuf, sizeof ttyobuf); |
54 |
|
|
ring_init(&ttyiring, ttyibuf, sizeof ttyibuf); |
55 |
|
|
|
56 |
|
|
tcgetattr(0, &tc); |
57 |
|
|
autoflush = (tc.c_lflag & NOFLSH) == 0; |
58 |
|
|
} |
59 |
|
|
|
60 |
|
|
/* |
61 |
|
|
* Send as much data as possible to the terminal. |
62 |
|
|
* |
63 |
|
|
* Return value: |
64 |
|
|
* -1: No useful work done, data waiting to go out. |
65 |
|
|
* 0: No data was waiting, so nothing was done. |
66 |
|
|
* 1: All waiting data was written out. |
67 |
|
|
* n: All data - n was written out. |
68 |
|
|
*/ |
69 |
|
|
|
70 |
|
|
int |
71 |
|
|
ttyflush(int drop) |
72 |
|
|
{ |
73 |
|
|
int n, n0, n1; |
74 |
|
|
|
75 |
|
|
n0 = ring_full_count(&ttyoring); |
76 |
|
|
if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) { |
77 |
|
|
if (drop) { |
78 |
|
|
tcflush(fileno(stdout), TCOFLUSH); |
79 |
|
|
/* we leave 'n' alone! */ |
80 |
|
|
} else { |
81 |
|
|
n = write(tout, ttyoring.consume, n); |
82 |
|
|
} |
83 |
|
|
} |
84 |
|
|
if (n > 0) { |
85 |
|
|
if (termdata && n) { |
86 |
|
|
Dump('>', ttyoring.consume, n); |
87 |
|
|
} |
88 |
|
|
/* |
89 |
|
|
* If we wrote everything, and the full count is |
90 |
|
|
* larger than what we wrote, then write the |
91 |
|
|
* rest of the buffer. |
92 |
|
|
*/ |
93 |
|
|
if (n1 == n && n0 > n) { |
94 |
|
|
n1 = n0 - n; |
95 |
|
|
if (!drop) |
96 |
|
|
n1 = write(tout, ttyoring.bottom, n1); |
97 |
|
|
if (n1 > 0) |
98 |
|
|
n += n1; |
99 |
|
|
} |
100 |
|
|
ring_consumed(&ttyoring, n); |
101 |
|
|
} |
102 |
|
|
if (n < 0) { |
103 |
|
|
if (errno == EPIPE) |
104 |
|
|
kill(0, SIGQUIT); |
105 |
|
|
return -1; |
106 |
|
|
} |
107 |
|
|
if (n == n0) { |
108 |
|
|
if (n0) |
109 |
|
|
return -1; |
110 |
|
|
return 0; |
111 |
|
|
} |
112 |
|
|
return n0 - n + 1; |
113 |
|
|
} |
114 |
|
|
|
115 |
|
|
|
116 |
|
|
/* |
117 |
|
|
* These routines decides on what the mode should be (based on the values |
118 |
|
|
* of various global variables). |
119 |
|
|
*/ |
120 |
|
|
|
121 |
|
|
int |
122 |
|
|
getconnmode(void) |
123 |
|
|
{ |
124 |
|
|
int mode = 0; |
125 |
|
|
|
126 |
|
|
if (my_want_state_is_dont(TELOPT_ECHO)) |
127 |
|
|
mode |= MODE_ECHO; |
128 |
|
|
|
129 |
|
|
if (localflow) |
130 |
|
|
mode |= MODE_FLOW; |
131 |
|
|
|
132 |
|
|
if ((eight & 1) || my_want_state_is_will(TELOPT_BINARY)) |
133 |
|
|
mode |= MODE_INBIN; |
134 |
|
|
|
135 |
|
|
if (eight & 2) |
136 |
|
|
mode |= MODE_OUT8; |
137 |
|
|
if (his_want_state_is_will(TELOPT_BINARY)) |
138 |
|
|
mode |= MODE_OUTBIN; |
139 |
|
|
|
140 |
|
|
#ifdef KLUDGELINEMODE |
141 |
|
|
if (kludgelinemode) { |
142 |
|
|
if (my_want_state_is_dont(TELOPT_SGA)) { |
143 |
|
|
mode |= (MODE_TRAPSIG|MODE_EDIT); |
144 |
|
|
if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) { |
145 |
|
|
mode &= ~MODE_ECHO; |
146 |
|
|
} |
147 |
|
|
} |
148 |
|
|
return(mode); |
149 |
|
|
} |
150 |
|
|
#endif |
151 |
|
|
if (my_want_state_is_will(TELOPT_LINEMODE)) |
152 |
|
|
mode |= linemode; |
153 |
|
|
return(mode); |
154 |
|
|
} |
155 |
|
|
|
156 |
|
|
void |
157 |
|
|
setconnmode(int force) |
158 |
|
|
{ |
159 |
|
|
int newmode; |
160 |
|
|
|
161 |
|
|
newmode = getconnmode()|(force?MODE_FORCE:0); |
162 |
|
|
|
163 |
|
|
TerminalNewMode(newmode); |
164 |
|
|
} |
165 |
|
|
|
166 |
|
|
void |
167 |
|
|
setcommandmode(void) |
168 |
|
|
{ |
169 |
|
|
TerminalNewMode(-1); |
170 |
|
|
} |