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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.1 by pcg, Mon Nov 24 17:28:08 2003 UTC vs.
Revision 1.26 by root, Mon Jan 2 15:10:18 2006 UTC

1/*--------------------------------*-C-*---------------------------------* 1/*--------------------------------*-C-*---------------------------------*
2 * File: ptytty.c 2 * File: ptytty.C
3 *----------------------------------------------------------------------* 3 *----------------------------------------------------------------------*
4 * $Id: ptytty.C,v 1.1 2003/11/24 17:28:08 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 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
77 if (openpty(&pfd, fd_tty, tty_name, NULL, NULL) != -1) { 81 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1)
82 {
78 *ttydev = strdup(tty_name); 83 *ttydev = strdup (tty_name);
79 return pfd; 84 return pfd;
80 } 85 }
81#endif 86#endif
82 87
83#ifdef PTYS_ARE__GETPTY 88#ifdef PTYS_ARE__GETPTY
84 *ttydev = _getpty(&pfd, O_RDWR | O_NDELAY | O_NOCTTY, 0622, 0); 89 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
85 if (*ttydev != NULL) 90 if (*ttydev != NULL)
86 return pfd; 91 return pfd;
87#endif 92#endif
88 93
89#ifdef PTYS_ARE_GETPTY 94#ifdef PTYS_ARE_GETPTY
90 char *ptydev; 95 char *ptydev;
91 96
92 while ((ptydev = getpty()) != NULL) 97 while ((ptydev = getpty ()) != NULL)
93 if ((pfd = open(ptydev, O_RDWR | O_NOCTTY, 0)) >= 0) { 98 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
99 {
94 *ttydev = ptydev; 100 *ttydev = ptydev;
95 return pfd; 101 return pfd;
96 } 102 }
97#endif 103#endif
98 104
99#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 105#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
100# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) 106# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
107
101 { 108 {
102# ifdef PTYS_ARE_GETPT 109# ifdef PTYS_ARE_GETPT
103 pfd = getpt(); 110 pfd = getpt ();
104# else 111# else
105 pfd = open("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 112 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
106# endif 113# endif
114
107 if (pfd >= 0) { 115 if (pfd >= 0)
116 {
108 if (grantpt(pfd) == 0 /* change slave permissions */ 117 if (grantpt (pfd) == 0 /* change slave permissions */
109 && unlockpt(pfd) == 0) { /* slave now unlocked */ 118 && unlockpt (pfd) == 0)
119 { /* slave now unlocked */
110 *ttydev = ptsname(pfd); /* get slave's name */ 120 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
111 return pfd; 121 return pfd;
112 } 122 }
113 close(pfd); 123 close (pfd);
114 }
115 } 124 }
125 }
116# endif 126# endif
117#endif 127#endif
118 128
119#ifdef PTYS_ARE_PTC 129#ifdef PTYS_ARE_PTC
120 if ((pfd = open("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) { 130 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
121 *ttydev = ttyname(pfd); 131 {
132 *ttydev = strdup (ttyname (pfd));
122 return pfd; 133 return pfd;
123 } 134 }
124#endif 135#endif
125 136
126#ifdef PTYS_ARE_CLONE 137#ifdef PTYS_ARE_CLONE
127 if ((pfd = open("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) { 138 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
128 *ttydev = ptsname(pfd); 139 {
140 *ttydev = strdup (ptsname (pfd));
129 return pfd; 141 return pfd;
130 } 142 }
131#endif 143#endif
132 144
133#ifdef PTYS_ARE_NUMERIC 145#ifdef PTYS_ARE_NUMERIC
134 { 146 {
135 int idx; 147 int idx;
136 char *c1, *c2; 148 char *c1, *c2;
137 char pty_name[] = "/dev/ptyp???"; 149 char pty_name[] = "/dev/ptyp???";
138 char tty_name[] = "/dev/ttyp???"; 150 char tty_name[] = "/dev/ttyp???";
139 151
140 c1 = &(pty_name[sizeof(pty_name) - 4]); 152 c1 = &(pty_name[sizeof (pty_name) - 4]);
141 c2 = &(tty_name[sizeof(tty_name) - 4]); 153 c2 = &(tty_name[sizeof (tty_name) - 4]);
142 for (idx = 0; idx < 256; idx++) { 154 for (idx = 0; idx < 256; idx++)
155 {
143 sprintf(c1, "%d", idx); 156 sprintf (c1, "%d", idx);
144 sprintf(c2, "%d", idx); 157 sprintf (c2, "%d", idx);
145 if (access(tty_name, F_OK) < 0) { 158 if (access (tty_name, F_OK) < 0)
146 idx = 256; 159 {
147 break; 160 idx = 256;
148 } 161 break;
162 }
163
149 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) { 164 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
165 {
150 if (access(tty_name, R_OK | W_OK) == 0) { 166 if (access (tty_name, R_OK | W_OK) == 0)
167 {
151 *ttydev = strdup(tty_name); 168 *ttydev = strdup (tty_name);
152 return pfd; 169 return pfd;
153 } 170 }
154 close(pfd); 171
155 } 172 close (pfd);
156 } 173 }
157 } 174 }
175 }
158#endif 176#endif
177
159#ifdef PTYS_ARE_SEARCHED 178#ifdef PTYS_ARE_SEARCHED
160 { 179 {
161 const char *c1, *c2; 180 const char *c1, *c2;
162 char pty_name[] = "/dev/pty??"; 181 char pty_name[] = "/dev/pty??";
163 char tty_name[] = "/dev/tty??"; 182 char tty_name[] = "/dev/tty??";
164 183
165# ifndef PTYCHAR1 184# ifndef PTYCHAR1
166# define PTYCHAR1 "pqrstuvwxyz" 185# define PTYCHAR1 "pqrstuvwxyz"
167# endif 186# endif
168# ifndef PTYCHAR2 187# ifndef PTYCHAR2
169# define PTYCHAR2 "0123456789abcdef" 188# define PTYCHAR2 "0123456789abcdef"
170# endif 189# endif
190
171 for (c1 = PTYCHAR1; *c1; c1++) { 191 for (c1 = PTYCHAR1; *c1; c1++)
192 {
172 pty_name[(sizeof(pty_name) - 3)] = 193 pty_name[ (sizeof (pty_name) - 3)] =
173 tty_name[(sizeof(pty_name) - 3)] = *c1; 194 tty_name[ (sizeof (pty_name) - 3)] = *c1;
174 for (c2 = PTYCHAR2; *c2; c2++) { 195 for (c2 = PTYCHAR2; *c2; c2++)
196 {
175 pty_name[(sizeof(pty_name) - 2)] = 197 pty_name[ (sizeof (pty_name) - 2)] =
176 tty_name[(sizeof(pty_name) - 2)] = *c2; 198 tty_name[ (sizeof (pty_name) - 2)] = *c2;
177 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) { 199 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
200 {
178 if (access(tty_name, R_OK | W_OK) == 0) { 201 if (access (tty_name, R_OK | W_OK) == 0)
179 *ttydev = strdup(tty_name); 202 {
180 return pfd; 203 *ttydev = strdup (tty_name);
181 } 204 return pfd;
182 close(pfd); 205 }
183 } 206
184 } 207 close (pfd);
185 } 208 }
209 }
186 } 210 }
211 }
187#endif 212#endif
213
188 return -1; 214 return -1;
189} 215}
190 216
191/*----------------------------------------------------------------------*/ 217/*----------------------------------------------------------------------*/
192/* 218/*
193 * Returns tty file descriptor, or -1 on failure 219 * Returns tty file descriptor, or -1 on failure
194 */ 220 */
195/* EXTPROTO */ 221static int
196int
197rxvt_get_tty(const char *ttydev) 222get_tty (char *ttydev)
198{ 223{
199 return open(ttydev, O_RDWR | O_NOCTTY, 0); 224 return open (ttydev, O_RDWR | O_NOCTTY, 0);
200} 225}
201 226
202/*----------------------------------------------------------------------*/ 227/*----------------------------------------------------------------------*/
203/* 228/*
204 * Make our tty a controlling tty so that /dev/tty points to us 229 * Make our tty a controlling tty so that /dev/tty points to us
205 */ 230 */
206/* EXTPROTO */ 231static int
207int
208rxvt_control_tty(int fd_tty, const char *ttydev) 232control_tty (int fd_tty, const char *ttydev)
209{ 233{
210#ifndef __QNX__ 234#ifndef __QNX__
211 int fd; 235 int fd;
212 236
213 D_TTY((stderr, "rxvt_control_tty(): pid: %d, tty fd: %d, dev: %s", getpid(), fd_tty, ttydev));
214/* ---------------------------------------- */ 237 /* ---------------------------------------- */
215# ifdef HAVE_SETSID 238# ifdef HAVE_SETSID
216 setsid(); 239 setsid ();
217# endif 240# endif
218# if defined(HAVE_SETPGID) 241# if defined(HAVE_SETPGID)
219 setpgid(0, 0); 242 setpgid (0, 0);
220# elif defined(HAVE_SETPGRP) 243# elif defined(HAVE_SETPGRP)
221 setpgrp(0, 0); 244 setpgrp (0, 0);
222# endif 245# endif
246
223/* ---------------------------------------- */ 247 /* ---------------------------------------- */
224# ifdef TIOCNOTTY 248# ifdef TIOCNOTTY
225 fd = open("/dev/tty", O_RDWR | O_NOCTTY); 249 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) { 250 if (fd >= 0)
251 {
228 ioctl(fd, TIOCNOTTY, NULL); /* void tty associations */ 252 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
229 close(fd); 253 close (fd);
230 } 254 }
231# endif 255# endif
256
232/* ---------------------------------------- */ 257 /* ---------------------------------------- */
233 fd = open("/dev/tty", O_RDWR | O_NOCTTY); 258 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) 259 if (fd >= 0)
236 close(fd); /* ouch: still have controlling tty */ 260 close (fd); /* ouch: still have controlling tty */
261
237/* ---------------------------------------- */ 262 /* ---------------------------------------- */
238#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 263#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
239/* 264 /*
240 * Push STREAMS modules: 265 * Push STREAMS modules:
241 * ptem: pseudo-terminal hardware emulation module. 266 * ptem: pseudo-terminal hardware emulation module.
242 * ldterm: standard terminal line discipline. 267 * ldterm: standard terminal line discipline.
243 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 268 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
244 * 269 *
245 * After we push the STREAMS modules, the first open() on the slave side 270 * 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") 271 * (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 272 * 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 273 * 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 274 * 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 275 * 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 276 * 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 277 * 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 278 * close () - on the master side which causes a hang up to be sent
254 * through - Geoff Wing 279 * through - Geoff Wing
255 */ 280 */
256# ifdef HAVE_ISASTREAM 281# ifdef HAVE_ISASTREAM
257 if (isastream(fd_tty) == 1) 282 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 283# endif
284 {
285 ioctl (fd_tty, I_PUSH, "ptem");
286 ioctl (fd_tty, I_PUSH, "ldterm");
287 ioctl (fd_tty, I_PUSH, "ttcompat");
288 }
289#endif
266/* ---------------------------------------- */ 290 /* ---------------------------------------- */
267# if defined(TIOCSCTTY) 291# if defined(TIOCSCTTY)
268 fd = ioctl(fd_tty, TIOCSCTTY, NULL); 292 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
269 D_TTY((stderr, "rxvt_control_tty(): ioctl(..,TIOCSCTTY): %d", fd));
270# elif defined(TIOCSETCTTY) 293# elif defined(TIOCSETCTTY)
271 fd = ioctl(fd_tty, TIOCSETCTTY, NULL); 294 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
272 D_TTY((stderr, "rxvt_control_tty(): ioctl(..,TIOCSETCTTY): %d", fd));
273# else 295# else
274 fd = open(ttydev, O_RDWR); 296 fd = open (ttydev, O_RDWR);
275 D_TTY((stderr, "rxvt_control_tty(): tty open%s", fd < 0 ? " failure" : "ed OK"));
276 if (fd >= 0) 297 if (fd >= 0)
277 close(fd); 298 close (fd);
278# endif 299# endif
279/* ---------------------------------------- */ 300 /* ---------------------------------------- */
280 fd = open("/dev/tty", O_WRONLY); 301 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) 302 if (fd < 0)
283 return -1; /* fatal */ 303 return -1; /* fatal */
284 close(fd); 304 close (fd);
285/* ---------------------------------------- */ 305 /* ---------------------------------------- */
286 D_TTY((stderr, "rxvt_control_tty(): tcgetpgrp(): %d getpgrp(): %d", tcgetpgrp(fd_tty), getpgrp()));
287/* ---------------------------------------- */
288#endif /* ! __QNX__ */ 306#endif /* ! __QNX__ */
307
289 return 0; 308 return 0;
290} 309}
310
311#ifndef NO_SETOWNER_TTYDEV
312static struct ttyconf {
313 gid_t gid;
314 mode_t mode;
315
316 ttyconf ()
317 {
318#ifdef TTY_GID_SUPPORT
319 struct group *gr = getgrnam ("tty");
320
321 if (gr)
322 { /* change group ownership of tty to "tty" */
323 mode = S_IRUSR | S_IWUSR | S_IWGRP;
324 gid = gr->gr_gid;
325 }
326 else
327#endif /* TTY_GID_SUPPORT */
328 {
329 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
330 gid = getgid ();
331 }
332 }
333} ttyconf;
334
335void
336rxvt_ptytty::privileges (rxvt_privaction action)
337{
338 if (!name || !*name)
339 return;
340
341 rxvt_privileges (RESTORE);
342
343 if (action == SAVE)
344 {
345# ifndef RESET_TTY_TO_COMMON_DEFAULTS
346 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
347 if (lstat (name, &savestat) < 0) /* you lose out */
348 ;
349 else
350# endif
351 {
352 saved = true;
353 chown (name, getuid (), ttyconf.gid); /* fail silently */
354 chmod (name, ttyconf.mode);
355# ifdef HAVE_REVOKE
356 revoke (name);
357# endif
358 }
359 }
360 else
361 { /* action == RESTORE */
362# ifndef RESET_TTY_TO_COMMON_DEFAULTS
363 if (saved)
364 {
365 chmod (name, savestat.st_mode);
366 chown (name, savestat.st_uid, savestat.st_gid);
367 }
368# else
369 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
370 chown (name, 0, 0);
371# endif
372
373 }
374
375 rxvt_privileges (IGNORE);
376}
377#endif
378
379rxvt_ptytty::rxvt_ptytty ()
380{
381 pty = tty = -1;
382 name = 0;
383#ifndef NO_SETOWNER_TTYDEV
384 saved = false;
385#endif
386}
387
388rxvt_ptytty::~rxvt_ptytty ()
389{
390 put ();
391}
392
393void
394
395rxvt_ptytty::close_tty ()
396{
397 if (tty >= 0) close (tty);
398 tty = -1;
399}
400
401void
402rxvt_ptytty::put ()
403{
404#ifndef NO_SETOWNER_TTYDEV
405 if (tty >= 0)
406 privileges (RESTORE);
407#endif
408
409 if (pty >= 0) close (pty);
410 close_tty ();
411 free (name);
412
413 pty = tty = -1;
414 name = 0;
415}
416
417bool
418rxvt_ptytty::make_controlling_tty ()
419{
420 return control_tty (tty, name) >= 0;
421}
422
423bool
424rxvt_ptytty::get ()
425{
426 /* get master (pty) */
427 if ((pty = get_pty (&tty, &name)) < 0)
428 return false;
429
430 fcntl (pty, F_SETFL, O_NONBLOCK);
431
432 /* get slave (tty) */
433 if (tty < 0)
434 {
435#ifndef NO_SETOWNER_TTYDEV
436 privileges (SAVE);
437#endif
438
439 if ((tty = get_tty (name)) < 0)
440 {
441 put ();
442 return false;
443 }
444 }
445
446 return true;
447}
448
449void
450rxvt_ptytty::set_utf8_mode (bool on)
451{
452#ifdef IUTF8
453 if (pty != -1)
454 {
455 struct termios tio;
456
457 if (tcgetattr (pty, &tio) != -1)
458 {
459 tcflag_t new_cflag = tio.c_iflag;
460
461 if (on)
462 new_cflag |= IUTF8;
463 else
464 new_cflag &= ~IUTF8;
465
466 if (new_cflag != tio.c_iflag)
467 {
468 tio.c_iflag = new_cflag;
469 tcsetattr (pty, TCSANOW, &tio);
470 }
471 }
472 }
473#endif
474}
475
291/*----------------------- end-of-file (C source) -----------------------*/ 476/*----------------------- end-of-file (C source) -----------------------*/
477

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