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b80b8de3 AC |
1 | /*- |
2 | * Copyright (c) 1992, 1993 | |
3 | * The Regents of the University of California. All rights reserved. | |
4 | * | |
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. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | */ | |
33 | ||
34 | #ifndef lint | |
35 | static char sccsid[] = "@(#)tty.c 8.2 (Berkeley) 1/2/94"; | |
36 | #endif /* not lint */ | |
37 | ||
38 | #include <sys/ioctl.h> | |
39 | ||
40 | #include <curses.h> | |
41 | #include <termios.h> | |
42 | #include <unistd.h> | |
43 | ||
44 | /* | |
45 | * In general, curses should leave tty hardware settings alone (speed, parity, | |
46 | * word size). This is most easily done in BSD by using TCSASOFT on all | |
47 | * tcsetattr calls. On other systems, it would be better to get and restore | |
48 | * those attributes at each change, or at least when stopped and restarted. | |
49 | * See also the comments in getterm(). | |
50 | */ | |
51 | #ifdef TCSASOFT | |
52 | int __tcaction = 1; /* Ignore hardware settings. */ | |
53 | #else | |
54 | int __tcaction = 0; | |
55 | #endif | |
56 | ||
57 | struct termios __orig_termios, __baset; | |
58 | static struct termios cbreakt, rawt, *curt; | |
59 | static int useraw; | |
60 | ||
61 | #ifndef OXTABS | |
62 | #ifdef XTABS /* SMI uses XTABS. */ | |
63 | #define OXTABS XTABS | |
64 | #else | |
65 | #define OXTABS 0 | |
66 | #endif | |
67 | #endif | |
68 | ||
69 | /* | |
70 | * gettmode -- | |
71 | * Do terminal type initialization. | |
72 | */ | |
73 | int | |
74 | gettmode() | |
75 | { | |
76 | useraw = 0; | |
77 | ||
78 | if (tcgetattr(STDIN_FILENO, &__orig_termios)) | |
79 | return (ERR); | |
80 | ||
81 | __baset = __orig_termios; | |
82 | __baset.c_oflag &= ~OXTABS; | |
83 | ||
84 | GT = 0; /* historical. was used before we wired OXTABS off */ | |
85 | NONL = (__baset.c_oflag & ONLCR) == 0; | |
86 | ||
87 | /* | |
88 | * XXX | |
89 | * System V and SMI systems overload VMIN and VTIME, such that | |
90 | * VMIN is the same as the VEOF element, and VTIME is the same | |
91 | * as the VEOL element. This means that, if VEOF was ^D, the | |
92 | * default VMIN is 4. Majorly stupid. | |
93 | */ | |
94 | cbreakt = __baset; | |
95 | cbreakt.c_lflag &= ~ICANON; | |
96 | cbreakt.c_cc[VMIN] = 1; | |
97 | cbreakt.c_cc[VTIME] = 0; | |
98 | ||
99 | rawt = cbreakt; | |
100 | rawt.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|INLCR|IGNCR|ICRNL|IXON); | |
101 | rawt.c_oflag &= ~OPOST; | |
102 | rawt.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN); | |
103 | ||
104 | /* | |
105 | * In general, curses should leave hardware-related settings alone. | |
106 | * This includes parity and word size. Older versions set the tty | |
107 | * to 8 bits, no parity in raw(), but this is considered to be an | |
108 | * artifact of the old tty interface. If it's desired to change | |
109 | * parity and word size, the TCSASOFT bit has to be removed from the | |
110 | * calls that switch to/from "raw" mode. | |
111 | */ | |
112 | if (!__tcaction) { | |
113 | rawt.c_iflag &= ~ISTRIP; | |
114 | rawt.c_cflag &= ~(CSIZE|PARENB); | |
115 | rawt.c_cflag |= CS8; | |
116 | } | |
117 | ||
118 | curt = &__baset; | |
119 | return (tcsetattr(STDIN_FILENO, __tcaction ? | |
120 | TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK); | |
121 | } | |
122 | ||
123 | int | |
124 | raw() | |
125 | { | |
126 | useraw = __pfast = __rawmode = 1; | |
127 | curt = &rawt; | |
128 | return (tcsetattr(STDIN_FILENO, __tcaction ? | |
129 | TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); | |
130 | } | |
131 | ||
132 | int | |
133 | noraw() | |
134 | { | |
135 | useraw = __pfast = __rawmode = 0; | |
136 | curt = &__baset; | |
137 | return (tcsetattr(STDIN_FILENO, __tcaction ? | |
138 | TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); | |
139 | } | |
140 | ||
141 | int | |
142 | cbreak() | |
143 | { | |
144 | ||
145 | __rawmode = 1; | |
146 | curt = useraw ? &rawt : &cbreakt; | |
147 | return (tcsetattr(STDIN_FILENO, __tcaction ? | |
148 | TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); | |
149 | } | |
150 | ||
151 | int | |
152 | nocbreak() | |
153 | { | |
154 | ||
155 | __rawmode = 0; | |
156 | curt = useraw ? &rawt : &__baset; | |
157 | return (tcsetattr(STDIN_FILENO, __tcaction ? | |
158 | TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); | |
159 | } | |
160 | ||
161 | int | |
162 | echo() | |
163 | { | |
164 | rawt.c_lflag |= ECHO; | |
165 | cbreakt.c_lflag |= ECHO; | |
166 | __baset.c_lflag |= ECHO; | |
167 | ||
168 | __echoit = 1; | |
169 | return (tcsetattr(STDIN_FILENO, __tcaction ? | |
170 | TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); | |
171 | } | |
172 | ||
173 | int | |
174 | noecho() | |
175 | { | |
176 | rawt.c_lflag &= ~ECHO; | |
177 | cbreakt.c_lflag &= ~ECHO; | |
178 | __baset.c_lflag &= ~ECHO; | |
179 | ||
180 | __echoit = 0; | |
181 | return (tcsetattr(STDIN_FILENO, __tcaction ? | |
182 | TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); | |
183 | } | |
184 | ||
185 | int | |
186 | nl() | |
187 | { | |
188 | rawt.c_iflag |= ICRNL; | |
189 | rawt.c_oflag |= ONLCR; | |
190 | cbreakt.c_iflag |= ICRNL; | |
191 | cbreakt.c_oflag |= ONLCR; | |
192 | __baset.c_iflag |= ICRNL; | |
193 | __baset.c_oflag |= ONLCR; | |
194 | ||
195 | __pfast = __rawmode; | |
196 | return (tcsetattr(STDIN_FILENO, __tcaction ? | |
197 | TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); | |
198 | } | |
199 | ||
200 | int | |
201 | nonl() | |
202 | { | |
203 | rawt.c_iflag &= ~ICRNL; | |
204 | rawt.c_oflag &= ~ONLCR; | |
205 | cbreakt.c_iflag &= ~ICRNL; | |
206 | cbreakt.c_oflag &= ~ONLCR; | |
207 | __baset.c_iflag &= ~ICRNL; | |
208 | __baset.c_oflag &= ~ONLCR; | |
209 | ||
210 | __pfast = 1; | |
211 | return (tcsetattr(STDIN_FILENO, __tcaction ? | |
212 | TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); | |
213 | } | |
214 | ||
215 | void | |
216 | __startwin() | |
217 | { | |
218 | (void)fflush(stdout); | |
219 | (void)setvbuf(stdout, NULL, _IOFBF, 0); | |
220 | ||
221 | tputs(TI, 0, __cputchar); | |
222 | tputs(VS, 0, __cputchar); | |
223 | } | |
224 | ||
225 | int | |
226 | endwin() | |
227 | { | |
228 | __restore_stophandler(); | |
229 | ||
230 | if (curscr != NULL) { | |
231 | if (curscr->flags & __WSTANDOUT) { | |
232 | tputs(SE, 0, __cputchar); | |
233 | curscr->flags &= ~__WSTANDOUT; | |
234 | } | |
235 | __mvcur(curscr->cury, curscr->cury, curscr->maxy - 1, 0, 0); | |
236 | } | |
237 | ||
238 | (void)tputs(VE, 0, __cputchar); | |
239 | (void)tputs(TE, 0, __cputchar); | |
240 | (void)fflush(stdout); | |
241 | (void)setvbuf(stdout, NULL, _IOLBF, 0); | |
242 | ||
243 | return (tcsetattr(STDIN_FILENO, __tcaction ? | |
244 | TCSASOFT | TCSADRAIN : TCSADRAIN, &__orig_termios)); | |
245 | } | |
246 | ||
247 | /* | |
248 | * The following routines, savetty and resetty are completely useless and | |
249 | * are left in only as stubs. If people actually use them they will almost | |
250 | * certainly screw up the state of the world. | |
251 | */ | |
252 | static struct termios savedtty; | |
253 | int | |
254 | savetty() | |
255 | { | |
256 | return (tcgetattr(STDIN_FILENO, &savedtty)); | |
257 | } | |
258 | ||
259 | int | |
260 | resetty() | |
261 | { | |
262 | return (tcsetattr(STDIN_FILENO, __tcaction ? | |
263 | TCSASOFT | TCSADRAIN : TCSADRAIN, &savedtty)); | |
264 | } |