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shtty.c

Absolute File Name:/home/opencoverage/opencoverage/guest-scripts/bash/src/lib/sh/shtty.c
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1/*-
2 * shtty.c -- abstract interface to the terminal, focusing on capabilities.-
3 */-
4-
5/* Copyright (C) 1999 Free Software Foundation, Inc.-
6-
7 This file is part of GNU Bash, the Bourne Again SHell.-
8-
9 Bash is free software: you can redistribute it and/or modify-
10 it under the terms of the GNU General Public License as published by-
11 the Free Software Foundation, either version 3 of the License, or-
12 (at your option) any later version.-
13-
14 Bash is distributed in the hope that it will be useful,-
15 but WITHOUT ANY WARRANTY; without even the implied warranty of-
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the-
17 GNU General Public License for more details.-
18-
19 You should have received a copy of the GNU General Public License-
20 along with Bash. If not, see <http://www.gnu.org/licenses/>.-
21*/-
22-
23#ifdef HAVE_CONFIG_H-
24# include <config.h>-
25#endif-
26-
27#ifdef HAVE_UNISTD_H-
28# include <unistd.h>-
29#endif-
30-
31#include <shtty.h>-
32-
33static TTYSTRUCT ttin, ttout;-
34static int ttsaved = 0;-
35-
36int-
37ttgetattr(fd, ttp)-
38int fd;-
39TTYSTRUCT *ttp;-
40{-
41#ifdef TERMIOS_TTY_DRIVER-
42 return tcgetattr(fd, ttp);
never executed: return tcgetattr(fd, ttp);
0
43#else-
44# ifdef TERMIO_TTY_DRIVER-
45 return ioctl(fd, TCGETA, ttp);-
46# else-
47 return ioctl(fd, TIOCGETP, ttp);-
48# endif-
49#endif-
50}-
51-
52int-
53ttsetattr(fd, ttp)-
54int fd;-
55TTYSTRUCT *ttp;-
56{-
57#ifdef TERMIOS_TTY_DRIVER-
58 return tcsetattr(fd, TCSADRAIN, ttp);
never executed: return tcsetattr(fd, 1 , ttp);
0
59#else-
60# ifdef TERMIO_TTY_DRIVER-
61 return ioctl(fd, TCSETAW, ttp);-
62# else-
63 return ioctl(fd, TIOCSETN, ttp);-
64# endif-
65#endif-
66}-
67-
68void-
69ttsave()-
70{-
71 if (ttsaved)
ttsavedDescription
TRUEnever evaluated
FALSEnever evaluated
0
72 return;
never executed: return;
0
73 ttgetattr (0, &ttin);-
74 ttgetattr (1, &ttout);-
75 ttsaved = 1;-
76}
never executed: end of block
0
77-
78void-
79ttrestore()-
80{-
81 if (ttsaved == 0)
ttsaved == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
82 return;
never executed: return;
0
83 ttsetattr (0, &ttin);-
84 ttsetattr (1, &ttout);-
85 ttsaved = 0;-
86}
never executed: end of block
0
87-
88/* Retrieve the internally-saved attributes associated with tty fd FD. */-
89TTYSTRUCT *-
90ttattr (fd)-
91 int fd;-
92{-
93 if (ttsaved == 0)
ttsaved == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
94 return ((TTYSTRUCT *)0);
never executed: return ((struct termios *)0);
0
95 if (fd == 0)
fd == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
96 return &ttin;
never executed: return &ttin;
0
97 else if (fd == 1)
fd == 1Description
TRUEnever evaluated
FALSEnever evaluated
0
98 return &ttout;
never executed: return &ttout;
0
99 else-
100 return ((TTYSTRUCT *)0);
never executed: return ((struct termios *)0);
0
101}-
102-
103/*-
104 * Change attributes in ttp so that when it is installed using-
105 * ttsetattr, the terminal will be in one-char-at-a-time mode.-
106 */-
107int-
108tt_setonechar(ttp)-
109 TTYSTRUCT *ttp;-
110{-
111#if defined (TERMIOS_TTY_DRIVER) || defined (TERMIO_TTY_DRIVER)-
112-
113 /* XXX - might not want this -- it disables erase and kill processing. */-
114 ttp->c_lflag &= ~ICANON;-
115-
116 ttp->c_lflag |= ISIG;-
117# ifdef IEXTEN-
118 ttp->c_lflag |= IEXTEN;-
119# endif-
120-
121 ttp->c_iflag |= ICRNL; /* make sure we get CR->NL on input */-
122 ttp->c_iflag &= ~INLCR; /* but no NL->CR */-
123-
124# ifdef OPOST-
125 ttp->c_oflag |= OPOST;-
126# endif-
127# ifdef ONLCR-
128 ttp->c_oflag |= ONLCR;-
129# endif-
130# ifdef OCRNL-
131 ttp->c_oflag &= ~OCRNL;-
132# endif-
133# ifdef ONOCR-
134 ttp->c_oflag &= ~ONOCR;-
135# endif-
136# ifdef ONLRET-
137 ttp->c_oflag &= ~ONLRET;-
138# endif-
139-
140 ttp->c_cc[VMIN] = 1;-
141 ttp->c_cc[VTIME] = 0;-
142-
143#else-
144-
145 ttp->sg_flags |= CBREAK;-
146-
147#endif-
148-
149 return 0;
never executed: return 0;
0
150}-
151-
152/* Set the tty associated with FD and TTP into one-character-at-a-time mode */-
153int-
154ttfd_onechar (fd, ttp)-
155 int fd;-
156 TTYSTRUCT *ttp;-
157{-
158 if (tt_setonechar(ttp) < 0)
tt_setonechar(ttp) < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
159 return -1;
never executed: return -1;
0
160 return (ttsetattr (fd, ttp));
never executed: return (ttsetattr (fd, ttp));
0
161}-
162-
163/* Set the terminal into one-character-at-a-time mode */-
164int-
165ttonechar ()-
166{-
167 TTYSTRUCT tt;-
168-
169 if (ttsaved == 0)
ttsaved == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
170 return -1;
never executed: return -1;
0
171 tt = ttin;-
172 return (ttfd_onechar (0, &tt));
never executed: return (ttfd_onechar (0, &tt));
0
173}-
174-
175/*-
176 * Change attributes in ttp so that when it is installed using-
177 * ttsetattr, the terminal will be in no-echo mode.-
178 */-
179int-
180tt_setnoecho(ttp)-
181 TTYSTRUCT *ttp;-
182{-
183#if defined (TERMIOS_TTY_DRIVER) || defined (TERMIO_TTY_DRIVER)-
184 ttp->c_lflag &= ~(ECHO|ECHOK|ECHONL);-
185#else-
186 ttp->sg_flags &= ~ECHO;-
187#endif-
188-
189 return 0;
never executed: return 0;
0
190}-
191-
192/* Set the tty associated with FD and TTP into no-echo mode */-
193int-
194ttfd_noecho (fd, ttp)-
195 int fd;-
196 TTYSTRUCT *ttp;-
197{-
198 if (tt_setnoecho (ttp) < 0)
tt_setnoecho (ttp) < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
199 return -1;
never executed: return -1;
0
200 return (ttsetattr (fd, ttp));
never executed: return (ttsetattr (fd, ttp));
0
201}-
202-
203/* Set the terminal into no-echo mode */-
204int-
205ttnoecho ()-
206{-
207 TTYSTRUCT tt;-
208-
209 if (ttsaved == 0)
ttsaved == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
210 return -1;
never executed: return -1;
0
211 tt = ttin;-
212 return (ttfd_noecho (0, &tt));
never executed: return (ttfd_noecho (0, &tt));
0
213}-
214-
215/*-
216 * Change attributes in ttp so that when it is installed using-
217 * ttsetattr, the terminal will be in eight-bit mode (pass8).-
218 */-
219int-
220tt_seteightbit (ttp)-
221 TTYSTRUCT *ttp;-
222{-
223#if defined (TERMIOS_TTY_DRIVER) || defined (TERMIO_TTY_DRIVER)-
224 ttp->c_iflag &= ~ISTRIP;-
225 ttp->c_cflag |= CS8;-
226 ttp->c_cflag &= ~PARENB;-
227#else-
228 ttp->sg_flags |= ANYP;-
229#endif-
230-
231 return 0;
never executed: return 0;
0
232}-
233-
234/* Set the tty associated with FD and TTP into eight-bit mode */-
235int-
236ttfd_eightbit (fd, ttp)-
237 int fd;-
238 TTYSTRUCT *ttp;-
239{-
240 if (tt_seteightbit (ttp) < 0)
tt_seteightbit (ttp) < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
241 return -1;
never executed: return -1;
0
242 return (ttsetattr (fd, ttp));
never executed: return (ttsetattr (fd, ttp));
0
243}-
244-
245/* Set the terminal into eight-bit mode */-
246int-
247tteightbit ()-
248{-
249 TTYSTRUCT tt;-
250-
251 if (ttsaved == 0)
ttsaved == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
252 return -1;
never executed: return -1;
0
253 tt = ttin;-
254 return (ttfd_eightbit (0, &tt));
never executed: return (ttfd_eightbit (0, &tt));
0
255}-
256-
257/*-
258 * Change attributes in ttp so that when it is installed using-
259 * ttsetattr, the terminal will be in non-canonical input mode.-
260 */-
261int-
262tt_setnocanon (ttp)-
263 TTYSTRUCT *ttp;-
264{-
265#if defined (TERMIOS_TTY_DRIVER) || defined (TERMIO_TTY_DRIVER)-
266 ttp->c_lflag &= ~ICANON;-
267#endif-
268-
269 return 0;
never executed: return 0;
0
270}-
271-
272/* Set the tty associated with FD and TTP into non-canonical mode */-
273int-
274ttfd_nocanon (fd, ttp)-
275 int fd;-
276 TTYSTRUCT *ttp;-
277{-
278 if (tt_setnocanon (ttp) < 0)
tt_setnocanon (ttp) < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
279 return -1;
never executed: return -1;
0
280 return (ttsetattr (fd, ttp));
never executed: return (ttsetattr (fd, ttp));
0
281}-
282-
283/* Set the terminal into non-canonical mode */-
284int-
285ttnocanon ()-
286{-
287 TTYSTRUCT tt;-
288-
289 if (ttsaved == 0)
ttsaved == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
290 return -1;
never executed: return -1;
0
291 tt = ttin;-
292 return (ttfd_nocanon (0, &tt));
never executed: return (ttfd_nocanon (0, &tt));
0
293}-
294-
295/*-
296 * Change attributes in ttp so that when it is installed using-
297 * ttsetattr, the terminal will be in cbreak, no-echo mode.-
298 */-
299int-
300tt_setcbreak(ttp)-
301 TTYSTRUCT *ttp;-
302{-
303 if (tt_setonechar (ttp) < 0)
tt_setonechar (ttp) < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
304 return -1;
never executed: return -1;
0
305 return (tt_setnoecho (ttp));
never executed: return (tt_setnoecho (ttp));
0
306}-
307-
308/* Set the tty associated with FD and TTP into cbreak (no-echo,-
309 one-character-at-a-time) mode */-
310int-
311ttfd_cbreak (fd, ttp)-
312 int fd;-
313 TTYSTRUCT *ttp;-
314{-
315 if (tt_setcbreak (ttp) < 0)
tt_setcbreak (ttp) < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
316 return -1;
never executed: return -1;
0
317 return (ttsetattr (fd, ttp));
never executed: return (ttsetattr (fd, ttp));
0
318}-
319-
320/* Set the terminal into cbreak (no-echo, one-character-at-a-time) mode */-
321int-
322ttcbreak ()-
323{-
324 TTYSTRUCT tt;-
325-
326 if (ttsaved == 0)
ttsaved == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
327 return -1;
never executed: return -1;
0
328 tt = ttin;-
329 return (ttfd_cbreak (0, &tt));
never executed: return (ttfd_cbreak (0, &tt));
0
330}-
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