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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.3 by pcg, Tue Nov 25 15:25:17 2003 UTC vs.
Revision 1.30 by root, Fri Jan 6 05:37:59 2006 UTC

1/*--------------------------------*-C-*---------------------------------* 1/*--------------------------------*-C-*---------------------------------*
2 * File: ptytty.c 2 * File: ptytty.C
3 *----------------------------------------------------------------------* 3 *----------------------------------------------------------------------*
4 * $Id: ptytty.C,v 1.3 2003/11/25 15:25:17 pcg Exp $
5 * 4 *
6 * All portions of code are copyright by their respective author/s. 5 * All portions of code are copyright by their respective author/s.
7 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> 6 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com>
7 * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com>
8 * 8 *
9 * This program is free software; you can redistribute it and/or modify 9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by 10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or 11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version. 12 * (at your option) any later version.
… …
20 * along with this program; if not, write to the Free Software 20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *---------------------------------------------------------------------*/ 22 *---------------------------------------------------------------------*/
23 23
24#include "../config.h" /* NECESSARY */ 24#include "../config.h" /* NECESSARY */
25#include "rxvt.h"
25 26
26/*
27 * Try to be self-contained except for the above autoconfig'd defines
28 */
29
30#include <stdio.h>
31#ifdef HAVE_STDLIB_H 27#ifdef HAVE_STDLIB_H
32# include <stdlib.h> 28# include <cstdlib>
33#endif 29#endif
34#ifdef HAVE_SYS_TYPES_H 30#ifdef HAVE_SYS_TYPES_H
35# include <sys/types.h> 31# include <sys/types.h>
36#endif 32#endif
37#ifdef HAVE_UNISTD_H 33#ifdef HAVE_UNISTD_H
38# include <unistd.h> 34# include <unistd.h>
39#endif 35#endif
40#if defined(HAVE_STRING_H) 36#if defined(HAVE_STRING_H)
41# include <string.h> 37# include <cstring>
42#endif 38#endif
43#ifdef HAVE_FCNTL_H 39#ifdef HAVE_FCNTL_H
44# include <fcntl.h> 40# include <fcntl.h>
45#endif 41#endif
46#ifdef HAVE_SYS_IOCTL_H 42#ifdef HAVE_SYS_IOCTL_H
47# include <sys/ioctl.h> 43# include <sys/ioctl.h>
48#endif 44#endif
49#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 45#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
50# include <sys/stropts.h> /* for I_PUSH */ 46# include <sys/stropts.h> /* for I_PUSH */
51#endif 47#endif
52 48#ifdef HAVE_ISASTREAM
53 49# include <stropts.h>
54#ifdef DEBUG_TTY
55# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
56#else
57# define D_TTY(x)
58#endif 50#endif
51#ifdef HAVE_PTY_H
52# include <pty.h>
53#endif
54
55// better do this via configure, but....
56#if defined(__FreeBSD__)
57# include <libutil.h>
58#elif defined(__DARWIN__) || (defined (__MACH__) && defined (__APPLE__))
59# include <util.h>
60#endif
61
62#include <cstdio>
63#include <grp.h>
59 64
60/* ------------------------------------------------------------------------- * 65/* ------------------------------------------------------------------------- *
61 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 66 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
62 * ------------------------------------------------------------------------- */ 67 * ------------------------------------------------------------------------- */
63/* 68/*
64 * Returns pty file descriptor, or -1 on failure 69 * Returns pty file descriptor, or -1 on failure
65 * If successful, ttydev is set to the name of the slave device. 70 * If successful, ttydev is set to the name of the slave device.
66 * fd_tty _may_ also be set to an open fd to the slave device 71 * fd_tty _may_ also be set to an open fd to the slave device
67 */ 72 */
68/* EXTPROTO */ 73static int
69int
70rxvt_get_pty(int *fd_tty, const char **ttydev) 74get_pty (int *fd_tty, char **ttydev)
71{ 75{
72 int pfd; 76 int pfd;
73 77
74#ifdef PTYS_ARE_OPENPTY 78#ifdef PTYS_ARE_OPENPTY
75 char tty_name[sizeof "/dev/pts/????\0"]; 79 char tty_name[sizeof "/dev/pts/????\0"];
76 80
81 rxvt_privileges(RESTORE);
77 if (openpty(&pfd, fd_tty, tty_name, NULL, NULL) != -1) { 82 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
83 rxvt_privileges(IGNORE);
84
85 if (res != -1)
86 {
78 *ttydev = strdup(tty_name); 87 *ttydev = strdup (tty_name);
79 return pfd; 88 return pfd;
80 } 89 }
81#endif 90#endif
82 91
83#ifdef PTYS_ARE__GETPTY 92#ifdef PTYS_ARE__GETPTY
84 *ttydev = _getpty(&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 93 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
85 if (*ttydev != NULL) 94 if (*ttydev != NULL)
86 return pfd; 95 return pfd;
87#endif 96#endif
88 97
89#ifdef PTYS_ARE_GETPTY 98#ifdef PTYS_ARE_GETPTY
90 char *ptydev; 99 char *ptydev;
91 100
92 while ((ptydev = getpty()) != NULL) 101 while ((ptydev = getpty ()) != NULL)
93 if ((pfd = open(ptydev, O_RDWR | O_NOCTTY, 0)) >= 0) { 102 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
103 {
94 *ttydev = ptydev; 104 *ttydev = ptydev;
95 return pfd; 105 return pfd;
96 } 106 }
97#endif 107#endif
98 108
99#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 109#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
100# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) 110# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
111
101 { 112 {
102# ifdef PTYS_ARE_GETPT 113# ifdef PTYS_ARE_GETPT
103 pfd = getpt(); 114 pfd = getpt ();
104# else 115# else
105 pfd = open("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 116 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
106# endif 117# endif
118
107 if (pfd >= 0) { 119 if (pfd >= 0)
120 {
108 if (grantpt(pfd) == 0 /* change slave permissions */ 121 if (grantpt (pfd) == 0 /* change slave permissions */
109 && unlockpt(pfd) == 0) { /* slave now unlocked */ 122 && unlockpt (pfd) == 0)
123 { /* slave now unlocked */
110 *ttydev = ptsname(pfd); /* get slave's name */ 124 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
111 return pfd; 125 return pfd;
112 } 126 }
113 close(pfd); 127 close (pfd);
114 }
115 } 128 }
129 }
116# endif 130# endif
117#endif 131#endif
118 132
119#ifdef PTYS_ARE_PTC 133#ifdef PTYS_ARE_PTC
120 if ((pfd = open("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) { 134 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
121 *ttydev = ttyname(pfd); 135 {
136 *ttydev = strdup (ttyname (pfd));
122 return pfd; 137 return pfd;
123 } 138 }
124#endif 139#endif
125 140
126#ifdef PTYS_ARE_CLONE 141#ifdef PTYS_ARE_CLONE
127 if ((pfd = open("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) { 142 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
128 *ttydev = ptsname(pfd); 143 {
144 *ttydev = strdup (ptsname (pfd));
129 return pfd; 145 return pfd;
130 } 146 }
131#endif 147#endif
132 148
133#ifdef PTYS_ARE_NUMERIC 149#ifdef PTYS_ARE_NUMERIC
134 { 150 {
135 int idx; 151 int idx;
136 char *c1, *c2; 152 char *c1, *c2;
137 char pty_name[] = "/dev/ptyp???"; 153 char pty_name[] = "/dev/ptyp???";
138 char tty_name[] = "/dev/ttyp???"; 154 char tty_name[] = "/dev/ttyp???";
139 155
140 c1 = &(pty_name[sizeof(pty_name) - 4]); 156 c1 = &(pty_name[sizeof (pty_name) - 4]);
141 c2 = &(tty_name[sizeof(tty_name) - 4]); 157 c2 = &(tty_name[sizeof (tty_name) - 4]);
142 for (idx = 0; idx < 256; idx++) { 158 for (idx = 0; idx < 256; idx++)
159 {
143 sprintf(c1, "%d", idx); 160 sprintf (c1, "%d", idx);
144 sprintf(c2, "%d", idx); 161 sprintf (c2, "%d", idx);
145 if (access(tty_name, F_OK) < 0) { 162 if (access (tty_name, F_OK) < 0)
146 idx = 256; 163 {
147 break; 164 idx = 256;
148 } 165 break;
166 }
167
149 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) { 168 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
169 {
150 if (access(tty_name, R_OK | W_OK) == 0) { 170 if (access (tty_name, R_OK | W_OK) == 0)
171 {
151 *ttydev = strdup(tty_name); 172 *ttydev = strdup (tty_name);
152 return pfd; 173 return pfd;
153 } 174 }
154 close(pfd); 175
155 } 176 close (pfd);
156 } 177 }
157 } 178 }
179 }
158#endif 180#endif
181
159#ifdef PTYS_ARE_SEARCHED 182#ifdef PTYS_ARE_SEARCHED
160 { 183 {
161 const char *c1, *c2; 184 const char *c1, *c2;
162 char pty_name[] = "/dev/pty??"; 185 char pty_name[] = "/dev/pty??";
163 char tty_name[] = "/dev/tty??"; 186 char tty_name[] = "/dev/tty??";
164 187
165# ifndef PTYCHAR1 188# ifndef PTYCHAR1
166# define PTYCHAR1 "pqrstuvwxyz" 189# define PTYCHAR1 "pqrstuvwxyz"
167# endif 190# endif
168# ifndef PTYCHAR2 191# ifndef PTYCHAR2
169# define PTYCHAR2 "0123456789abcdef" 192# define PTYCHAR2 "0123456789abcdef"
170# endif 193# endif
194
171 for (c1 = PTYCHAR1; *c1; c1++) { 195 for (c1 = PTYCHAR1; *c1; c1++)
196 {
172 pty_name[(sizeof(pty_name) - 3)] = 197 pty_name[ (sizeof (pty_name) - 3)] =
173 tty_name[(sizeof(pty_name) - 3)] = *c1; 198 tty_name[ (sizeof (pty_name) - 3)] = *c1;
174 for (c2 = PTYCHAR2; *c2; c2++) { 199 for (c2 = PTYCHAR2; *c2; c2++)
200 {
175 pty_name[(sizeof(pty_name) - 2)] = 201 pty_name[ (sizeof (pty_name) - 2)] =
176 tty_name[(sizeof(pty_name) - 2)] = *c2; 202 tty_name[ (sizeof (pty_name) - 2)] = *c2;
177 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) { 203 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
204 {
178 if (access(tty_name, R_OK | W_OK) == 0) { 205 if (access (tty_name, R_OK | W_OK) == 0)
179 *ttydev = strdup(tty_name); 206 {
180 return pfd; 207 *ttydev = strdup (tty_name);
181 } 208 return pfd;
182 close(pfd); 209 }
183 } 210
184 } 211 close (pfd);
185 } 212 }
213 }
186 } 214 }
215 }
187#endif 216#endif
217
188 return -1; 218 return -1;
189} 219}
190 220
191/*----------------------------------------------------------------------*/ 221/*----------------------------------------------------------------------*/
192/* 222/*
193 * Returns tty file descriptor, or -1 on failure 223 * Returns tty file descriptor, or -1 on failure
194 */ 224 */
195/* EXTPROTO */ 225static int
196int
197rxvt_get_tty(const char *ttydev) 226get_tty (char *ttydev)
198{ 227{
199 return open(ttydev, O_RDWR | O_NOCTTY, 0); 228 return open (ttydev, O_RDWR | O_NOCTTY, 0);
200} 229}
201 230
202/*----------------------------------------------------------------------*/ 231/*----------------------------------------------------------------------*/
203/* 232/*
204 * Make our tty a controlling tty so that /dev/tty points to us 233 * Make our tty a controlling tty so that /dev/tty points to us
205 */ 234 */
206/* EXTPROTO */ 235static int
207int
208rxvt_control_tty(int fd_tty, const char *ttydev) 236control_tty (int fd_tty, const char *ttydev)
209{ 237{
210#ifndef __QNX__ 238#ifndef __QNX__
211 int fd; 239 int fd;
212 240
213 D_TTY((stderr, "rxvt_control_tty(): pid: %d, tty fd: %d, dev: %s", getpid(), fd_tty, ttydev));
214/* ---------------------------------------- */ 241 /* ---------------------------------------- */
215# ifdef HAVE_SETSID 242# ifdef HAVE_SETSID
216 setsid(); 243 setsid ();
217# endif 244# endif
218# if defined(HAVE_SETPGID) 245# if defined(HAVE_SETPGID)
219 setpgid(0, 0); 246 setpgid (0, 0);
220# elif defined(HAVE_SETPGRP) 247# elif defined(HAVE_SETPGRP)
221 setpgrp(0, 0); 248 setpgrp (0, 0);
222# endif 249# endif
250
223/* ---------------------------------------- */ 251 /* ---------------------------------------- */
224# ifdef TIOCNOTTY 252# ifdef TIOCNOTTY
225 fd = open("/dev/tty", O_RDWR | O_NOCTTY); 253 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
226 D_TTY((stderr, "rxvt_control_tty(): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
227 if (fd >= 0) { 254 if (fd >= 0)
255 {
228 ioctl(fd, TIOCNOTTY, NULL); /* void tty associations */ 256 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
229 close(fd); 257 close (fd);
230 } 258 }
231# endif 259# endif
260
232/* ---------------------------------------- */ 261 /* ---------------------------------------- */
233 fd = open("/dev/tty", O_RDWR | O_NOCTTY); 262 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
234 D_TTY((stderr, "rxvt_control_tty(): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
235 if (fd >= 0) 263 if (fd >= 0)
236 close(fd); /* ouch: still have controlling tty */ 264 close (fd); /* ouch: still have controlling tty */
265
237/* ---------------------------------------- */ 266 /* ---------------------------------------- */
238#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 267#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
239/* 268 /*
240 * Push STREAMS modules: 269 * Push STREAMS modules:
241 * ptem: pseudo-terminal hardware emulation module. 270 * ptem: pseudo-terminal hardware emulation module.
242 * ldterm: standard terminal line discipline. 271 * ldterm: standard terminal line discipline.
243 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 272 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
244 * 273 *
245 * After we push the STREAMS modules, the first open() on the slave side 274 * After we push the STREAMS modules, the first open () on the slave side
246 * (i.e. the next section between the dashes giving us "tty opened OK") 275 * (i.e. the next section between the dashes giving us "tty opened OK")
247 * should make the "ptem" (or "ldterm" depending upon either which OS 276 * should make the "ptem" (or "ldterm" depending upon either which OS
248 * version or which set of manual pages you have) module give us a 277 * version or which set of manual pages you have) module give us a
249 * controlling terminal. We must already have close()d the master side 278 * controlling terminal. We must already have close ()d the master side
250 * fd in this child process before we push STREAMS modules on because the 279 * fd in this child process before we push STREAMS modules on because the
251 * documentation is really unclear about whether it is any close() on 280 * documentation is really unclear about whether it is any close () on
252 * the master side or the last close() - i.e. a proper STREAMS dismantling 281 * the master side or the last close () - i.e. a proper STREAMS dismantling
253 * close() - on the master side which causes a hang up to be sent 282 * close () - on the master side which causes a hang up to be sent
254 * through - Geoff Wing 283 * through - Geoff Wing
255 */ 284 */
256# ifdef HAVE_ISASTREAM 285# ifdef HAVE_ISASTREAM
257 if (isastream(fd_tty) == 1) 286 if (isastream (fd_tty) == 1)
258# endif
259 {
260 D_TTY((stderr, "rxvt_control_tty(): Pushing STREAMS modules"));
261 ioctl(fd_tty, I_PUSH, "ptem");
262 ioctl(fd_tty, I_PUSH, "ldterm");
263 ioctl(fd_tty, I_PUSH, "ttcompat");
264 }
265#endif 287# endif
288 {
289 ioctl (fd_tty, I_PUSH, "ptem");
290 ioctl (fd_tty, I_PUSH, "ldterm");
291 ioctl (fd_tty, I_PUSH, "ttcompat");
292 }
293#endif
266/* ---------------------------------------- */ 294 /* ---------------------------------------- */
267# if defined(TIOCSCTTY) 295# if defined(TIOCSCTTY)
268 fd = ioctl(fd_tty, TIOCSCTTY, NULL); 296 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
269 D_TTY((stderr, "rxvt_control_tty(): ioctl(..,TIOCSCTTY): %d", fd));
270# elif defined(TIOCSETCTTY) 297# elif defined(TIOCSETCTTY)
271 fd = ioctl(fd_tty, TIOCSETCTTY, NULL); 298 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
272 D_TTY((stderr, "rxvt_control_tty(): ioctl(..,TIOCSETCTTY): %d", fd));
273# else 299# else
274 fd = open(ttydev, O_RDWR); 300 fd = open (ttydev, O_RDWR);
275 D_TTY((stderr, "rxvt_control_tty(): tty open%s", fd < 0 ? " failure" : "ed OK"));
276 if (fd >= 0) 301 if (fd >= 0)
277 close(fd); 302 close (fd);
278# endif 303# endif
279/* ---------------------------------------- */ 304 /* ---------------------------------------- */
280 fd = open("/dev/tty", O_WRONLY); 305 fd = open ("/dev/tty", O_WRONLY);
281 D_TTY((stderr, "rxvt_control_tty(): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
282 if (fd < 0) 306 if (fd < 0)
283 return -1; /* fatal */ 307 return -1; /* fatal */
284 close(fd); 308 close (fd);
285/* ---------------------------------------- */ 309 /* ---------------------------------------- */
286 D_TTY((stderr, "rxvt_control_tty(): tcgetpgrp(): %d getpgrp(): %d", tcgetpgrp(fd_tty), getpgrp()));
287/* ---------------------------------------- */
288#endif /* ! __QNX__ */ 310#endif /* ! __QNX__ */
311
289 return 0; 312 return 0;
290} 313}
314
315#ifndef NO_SETOWNER_TTYDEV
316static struct ttyconf {
317 gid_t gid;
318 mode_t mode;
319
320 ttyconf ()
321 {
322#ifdef TTY_GID_SUPPORT
323 struct group *gr = getgrnam ("tty");
324
325 if (gr)
326 { /* change group ownership of tty to "tty" */
327 mode = S_IRUSR | S_IWUSR | S_IWGRP;
328 gid = gr->gr_gid;
329 }
330 else
331#endif /* TTY_GID_SUPPORT */
332 {
333 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
334 gid = getgid ();
335 }
336 }
337} ttyconf;
338
339void
340rxvt_ptytty::privileges (rxvt_privaction action)
341{
342 if (!name || !*name)
343 return;
344
345 rxvt_privileges (RESTORE);
346
347 if (action == SAVE)
348 {
349# ifndef RESET_TTY_TO_COMMON_DEFAULTS
350 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
351 if (lstat (name, &savestat) < 0) /* you lose out */
352 ;
353 else
354# endif
355 {
356 saved = true;
357 chown (name, getuid (), ttyconf.gid); /* fail silently */
358 chmod (name, ttyconf.mode);
359# ifdef HAVE_REVOKE
360 revoke (name);
361# endif
362 }
363 }
364 else
365 { /* action == RESTORE */
366# ifndef RESET_TTY_TO_COMMON_DEFAULTS
367 if (saved)
368 {
369 chmod (name, savestat.st_mode);
370 chown (name, savestat.st_uid, savestat.st_gid);
371 }
372# else
373 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
374 chown (name, 0, 0);
375# endif
376
377 }
378
379 rxvt_privileges (IGNORE);
380}
381#endif
382
383rxvt_ptytty::rxvt_ptytty ()
384{
385 pty = tty = -1;
386 name = 0;
387#ifndef NO_SETOWNER_TTYDEV
388 saved = false;
389#endif
390}
391
392rxvt_ptytty::~rxvt_ptytty ()
393{
394 put ();
395}
396
397void
398
399rxvt_ptytty::close_tty ()
400{
401 if (tty < 0)
402 return;
403
404 close (tty);
405 tty = -1;
406}
407
408void
409rxvt_ptytty::put ()
410{
411#ifndef NO_SETOWNER_TTYDEV
412 privileges (RESTORE);
413#endif
414
415 if (pty >= 0) close (pty);
416 close_tty ();
417 free (name);
418
419 pty = tty = -1;
420 name = 0;
421}
422
423bool
424rxvt_ptytty::make_controlling_tty ()
425{
426 return control_tty (tty, name) >= 0;
427}
428
429bool
430rxvt_ptytty::get ()
431{
432 /* get master (pty) */
433 if ((pty = get_pty (&tty, &name)) < 0)
434 return false;
435
436 fcntl (pty, F_SETFL, O_NONBLOCK);
437
438 /* get slave (tty) */
439 if (tty < 0)
440 {
441#ifndef NO_SETOWNER_TTYDEV
442 privileges (SAVE);
443#endif
444
445 if ((tty = get_tty (name)) < 0)
446 {
447 put ();
448 return false;
449 }
450 }
451
452 return true;
453}
454
455void
456rxvt_ptytty::set_utf8_mode (bool on)
457{
458#ifdef IUTF8
459 if (pty < 0)
460 return;
461
462 struct termios tio;
463
464 if (tcgetattr (pty, &tio) != -1)
465 {
466 tcflag_t new_cflag = tio.c_iflag;
467
468 if (on)
469 new_cflag |= IUTF8;
470 else
471 new_cflag &= ~IUTF8;
472
473 if (new_cflag != tio.c_iflag)
474 {
475 tio.c_iflag = new_cflag;
476 tcsetattr (pty, TCSANOW, &tio);
477 }
478 }
479#endif
480}
481
291/*----------------------- end-of-file (C source) -----------------------*/ 482/*----------------------- end-of-file (C source) -----------------------*/
483

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