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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.8 by pcg, Sat Mar 6 00:05:01 2004 UTC vs.
Revision 1.24 by root, Sat Dec 31 16:06:48 2005 UTC

1/*--------------------------------*-C-*---------------------------------* 1/*--------------------------------*-C-*---------------------------------*
2 * File: ptytty.c 2 * File: ptytty.C
3 *----------------------------------------------------------------------* 3 *----------------------------------------------------------------------*
4 * 4 *
5 * All portions of code are copyright by their respective author/s. 5 * All portions of code are copyright by their respective author/s.
6 * 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>
7 * 8 *
8 * 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
9 * 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
10 * the Free Software Foundation; either version 2 of the License, or 11 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version. 12 * (at your option) any later version.
… …
19 * along with this program; if not, write to the Free Software 20 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *---------------------------------------------------------------------*/ 22 *---------------------------------------------------------------------*/
22 23
23#include "../config.h" /* NECESSARY */ 24#include "../config.h" /* NECESSARY */
25#include "rxvt.h"
24 26
25/*
26 * Try to be self-contained except for the above autoconfig'd defines
27 */
28
29#if 0
30#ifdef HAVE_GETPT
31# define _GNU_SOURCE
32#endif
33#endif
34
35#include <cstdio>
36#ifdef HAVE_STDLIB_H 27#ifdef HAVE_STDLIB_H
37# include <cstdlib> 28# include <cstdlib>
38#endif 29#endif
39#ifdef HAVE_SYS_TYPES_H 30#ifdef HAVE_SYS_TYPES_H
40# include <sys/types.h> 31# include <sys/types.h>
… …
49# include <fcntl.h> 40# include <fcntl.h>
50#endif 41#endif
51#ifdef HAVE_SYS_IOCTL_H 42#ifdef HAVE_SYS_IOCTL_H
52# include <sys/ioctl.h> 43# include <sys/ioctl.h>
53#endif 44#endif
54#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 45#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
55# include <sys/stropts.h> /* for I_PUSH */ 46# include <sys/stropts.h> /* for I_PUSH */
56#endif 47#endif
57 48#ifdef HAVE_ISASTREAM
58#ifdef DEBUG_TTY 49# include <stropts.h>
59# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
60#else
61# define D_TTY(x)
62#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>
63 64
64/* ------------------------------------------------------------------------- * 65/* ------------------------------------------------------------------------- *
65 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 66 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
66 * ------------------------------------------------------------------------- */ 67 * ------------------------------------------------------------------------- */
67/* 68/*
68 * Returns pty file descriptor, or -1 on failure 69 * Returns pty file descriptor, or -1 on failure
69 * 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.
70 * 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
71 */ 72 */
72/* EXTPROTO */ 73static int
73int
74rxvt_get_pty (int *fd_tty, const char **ttydev) 74get_pty (int *fd_tty, char **ttydev)
75{ 75{
76 int pfd; 76 int pfd;
77 77
78#ifdef PTYS_ARE_OPENPTY 78#ifdef PTYS_ARE_OPENPTY
79
80 char tty_name[sizeof "/dev/pts/????\0"]; 79 char tty_name[sizeof "/dev/pts/?????\0"];
81 80
81 rxvt_privileges (RESTORE);
82 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)
83 { 86 {
84 *ttydev = strdup (tty_name); 87 *ttydev = strdup (tty_name);
85 return pfd; 88 return pfd;
86 } 89 }
87#endif 90#endif
… …
109 112
110 { 113 {
111# ifdef PTYS_ARE_GETPT 114# ifdef PTYS_ARE_GETPT
112 pfd = getpt (); 115 pfd = getpt ();
113# else 116# else
114
115 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 117 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
116# endif 118# endif
117 119
118 if (pfd >= 0) 120 if (pfd >= 0)
119 { 121 {
120 if (grantpt (pfd) == 0 /* change slave permissions */ 122 if (grantpt (pfd) == 0 /* change slave permissions */
121 && unlockpt (pfd) == 0) 123 && unlockpt (pfd) == 0)
122 { /* slave now unlocked */ 124 { /* slave now unlocked */
123 *ttydev = ptsname (pfd); /* get slave's name */ 125 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
124 return pfd; 126 return pfd;
125 } 127 }
126 close (pfd); 128 close (pfd);
127 } 129 }
128 } 130 }
… …
130#endif 132#endif
131 133
132#ifdef PTYS_ARE_PTC 134#ifdef PTYS_ARE_PTC
133 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 135 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
134 { 136 {
135 *ttydev = ttyname (pfd); 137 *ttydev = strdup (ttyname (pfd));
136 return pfd; 138 return pfd;
137 } 139 }
138#endif 140#endif
139 141
140#ifdef PTYS_ARE_CLONE 142#ifdef PTYS_ARE_CLONE
141 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 143 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
142 { 144 {
143 *ttydev = ptsname (pfd); 145 *ttydev = strdup (ptsname (pfd));
144 return pfd; 146 return pfd;
145 } 147 }
146#endif 148#endif
147 149
148#ifdef PTYS_ARE_NUMERIC 150#ifdef PTYS_ARE_NUMERIC
149 { 151 {
150 int idx; 152 int idx;
151 char *c1, *c2; 153 char *c1, *c2;
152 char pty_name[] = "/dev/ptyp???"; 154 char pty_name[] = "/dev/ptyp???";
153 char tty_name[] = "/dev/ttyp???"; 155 char tty_name[] = "/dev/ttyp???";
154 156
155 c1 = & (pty_name[sizeof (pty_name) - 4]); 157 c1 = &(pty_name[sizeof (pty_name) - 4]);
156 c2 = & (tty_name[sizeof (tty_name) - 4]); 158 c2 = &(tty_name[sizeof (tty_name) - 4]);
157 for (idx = 0; idx < 256; idx++) 159 for (idx = 0; idx < 256; idx++)
158 { 160 {
159 sprintf (c1, "%d", idx); 161 sprintf (c1, "%d", idx);
160 sprintf (c2, "%d", idx); 162 sprintf (c2, "%d", idx);
161 if (access (tty_name, F_OK) < 0) 163 if (access (tty_name, F_OK) < 0)
162 { 164 {
163 idx = 256; 165 idx = 256;
164 break; 166 break;
165 } 167 }
168
166 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 169 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
167 { 170 {
168 if (access (tty_name, R_OK | W_OK) == 0) 171 if (access (tty_name, R_OK | W_OK) == 0)
169 { 172 {
170 *ttydev = strdup (tty_name); 173 *ttydev = strdup (tty_name);
171 return pfd; 174 return pfd;
172 } 175 }
176
173 close (pfd); 177 close (pfd);
174 } 178 }
175 } 179 }
176 } 180 }
177#endif 181#endif
182
178#ifdef PTYS_ARE_SEARCHED 183#ifdef PTYS_ARE_SEARCHED
179 { 184 {
180 const char *c1, *c2; 185 const char *c1, *c2;
181 char pty_name[] = "/dev/pty??"; 186 char pty_name[] = "/dev/pty??";
182 char tty_name[] = "/dev/tty??"; 187 char tty_name[] = "/dev/tty??";
183 188
184# ifndef PTYCHAR1 189# ifndef PTYCHAR1
185# define PTYCHAR1 "pqrstuvwxyz" 190# define PTYCHAR1 "pqrstuvwxyz"
186# endif 191# endif
187# ifndef PTYCHAR2 192# ifndef PTYCHAR2
… …
201 if (access (tty_name, R_OK | W_OK) == 0) 206 if (access (tty_name, R_OK | W_OK) == 0)
202 { 207 {
203 *ttydev = strdup (tty_name); 208 *ttydev = strdup (tty_name);
204 return pfd; 209 return pfd;
205 } 210 }
211
206 close (pfd); 212 close (pfd);
207 } 213 }
208 } 214 }
209 } 215 }
210 } 216 }
211#endif 217#endif
218
212 return -1; 219 return -1;
213} 220}
214 221
215/*----------------------------------------------------------------------*/ 222/*----------------------------------------------------------------------*/
216/* 223/*
217 * Returns tty file descriptor, or -1 on failure 224 * Returns tty file descriptor, or -1 on failure
218 */ 225 */
219/* EXTPROTO */ 226static int
220int
221rxvt_get_tty (const char *ttydev) 227get_tty (char *ttydev)
222{ 228{
223 return open (ttydev, O_RDWR | O_NOCTTY, 0); 229 return open (ttydev, O_RDWR | O_NOCTTY, 0);
224} 230}
225 231
226/*----------------------------------------------------------------------*/ 232/*----------------------------------------------------------------------*/
227/* 233/*
228 * Make our tty a controlling tty so that /dev/tty points to us 234 * Make our tty a controlling tty so that /dev/tty points to us
229 */ 235 */
230/* EXTPROTO */ 236static int
231int
232rxvt_control_tty (int fd_tty, const char *ttydev) 237control_tty (int fd_tty, const char *ttydev)
233{ 238{
234#ifndef __QNX__ 239#ifndef __QNX__
235 int fd; 240 int fd;
236 241
237 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
238 /* ---------------------------------------- */ 242 /* ---------------------------------------- */
239# ifdef HAVE_SETSID 243# ifdef HAVE_SETSID
240 setsid (); 244 setsid ();
241# endif 245# endif
242# if defined(HAVE_SETPGID) 246# if defined(HAVE_SETPGID)
243 setpgid (0, 0); 247 setpgid (0, 0);
244# elif defined(HAVE_SETPGRP) 248# elif defined(HAVE_SETPGRP)
245 setpgrp (0, 0); 249 setpgrp (0, 0);
246# endif 250# endif
251
247 /* ---------------------------------------- */ 252 /* ---------------------------------------- */
248# ifdef TIOCNOTTY 253# ifdef TIOCNOTTY
249
250 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 254 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
251 D_TTY ((stderr, "rxvt_control_tty (): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
252 if (fd >= 0) 255 if (fd >= 0)
253 { 256 {
254 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ 257 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
255 close (fd); 258 close (fd);
256 } 259 }
257# endif 260# endif
261
258 /* ---------------------------------------- */ 262 /* ---------------------------------------- */
259 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 263 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
260 D_TTY ((stderr, "rxvt_control_tty (): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
261 if (fd >= 0) 264 if (fd >= 0)
262 close (fd); /* ouch: still have controlling tty */ 265 close (fd); /* ouch: still have controlling tty */
266
263 /* ---------------------------------------- */ 267 /* ---------------------------------------- */
264#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 268#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
265 /* 269 /*
266 * Push STREAMS modules: 270 * Push STREAMS modules:
267 * ptem: pseudo-terminal hardware emulation module. 271 * ptem: pseudo-terminal hardware emulation module.
… …
281 */ 285 */
282# ifdef HAVE_ISASTREAM 286# ifdef HAVE_ISASTREAM
283 if (isastream (fd_tty) == 1) 287 if (isastream (fd_tty) == 1)
284# endif 288# endif
285 { 289 {
286 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
287 ioctl (fd_tty, I_PUSH, "ptem"); 290 ioctl (fd_tty, I_PUSH, "ptem");
288 ioctl (fd_tty, I_PUSH, "ldterm"); 291 ioctl (fd_tty, I_PUSH, "ldterm");
289 ioctl (fd_tty, I_PUSH, "ttcompat"); 292 ioctl (fd_tty, I_PUSH, "ttcompat");
290 } 293 }
291#endif 294#endif
292 /* ---------------------------------------- */ 295 /* ---------------------------------------- */
293# if defined(TIOCSCTTY) 296# if defined(TIOCSCTTY)
294 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 297 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
295 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd));
296# elif defined(TIOCSETCTTY) 298# elif defined(TIOCSETCTTY)
297 fd = ioctl (fd_tty, TIOCSETCTTY, NULL); 299 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
298 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
299# else 300# else
300 fd = open (ttydev, O_RDWR); 301 fd = open (ttydev, O_RDWR);
301 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
302 if (fd >= 0) 302 if (fd >= 0)
303 close (fd); 303 close (fd);
304# endif 304# endif
305 /* ---------------------------------------- */ 305 /* ---------------------------------------- */
306 fd = open ("/dev/tty", O_WRONLY); 306 fd = open ("/dev/tty", O_WRONLY);
307 D_TTY ((stderr, "rxvt_control_tty (): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
308 if (fd < 0) 307 if (fd < 0)
309 return -1; /* fatal */ 308 return -1; /* fatal */
310 close (fd); 309 close (fd);
311 /* ---------------------------------------- */ 310 /* ---------------------------------------- */
312 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
313 /* ---------------------------------------- */
314#endif /* ! __QNX__ */ 311#endif /* ! __QNX__ */
315 312
316 return 0; 313 return 0;
317} 314}
315
316#ifndef NO_SETOWNER_TTYDEV
317static struct ttyconf {
318 gid_t gid;
319 mode_t mode;
320
321 ttyconf ()
322 {
323#ifdef TTY_GID_SUPPORT
324 struct group *gr = getgrnam ("tty");
325
326 if (gr)
327 { /* change group ownership of tty to "tty" */
328 mode = S_IRUSR | S_IWUSR | S_IWGRP;
329 gid = gr->gr_gid;
330 }
331 else
332#endif /* TTY_GID_SUPPORT */
333 {
334 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
335 gid = getgid ();
336 }
337 }
338} ttyconf;
339
340void
341rxvt_ptytty::privileges (rxvt_privaction action)
342{
343 if (tty < 0)
344 return;
345
346 rxvt_privileges (RESTORE);
347
348 if (action == SAVE)
349 {
350 //next_tty_action = RESTORE;
351# ifndef RESET_TTY_TO_COMMON_DEFAULTS
352 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
353 if (lstat (name, &savestat) < 0) /* you lose out */
354 ;//next_tty_action = IGNORE;
355 else
356# endif
357 {
358 chown (name, getuid (), ttyconf.gid); /* fail silently */
359 chmod (name, ttyconf.mode);
360# ifdef HAVE_REVOKE
361 revoke (name);
362# endif
363 }
364 }
365 else
366 { /* action == RESTORE */
367 //next_tty_action = IGNORE;
368# ifndef RESET_TTY_TO_COMMON_DEFAULTS
369 chmod (name, savestat.st_mode);
370 chown (name, savestat.st_uid, savestat.st_gid);
371# else
372 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
373 chown (name, 0, 0);
374# endif
375
376 }
377
378 rxvt_privileges (IGNORE);
379}
380#endif
381
382rxvt_ptytty::rxvt_ptytty ()
383{
384 pty = tty = -1;
385 name = 0;
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
318/*----------------------- end-of-file (C source) -----------------------*/ 476/*----------------------- end-of-file (C source) -----------------------*/
477

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