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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.10 by pcg, Fri Apr 2 20:41:01 2004 UTC vs.
Revision 1.37 by root, Tue Jan 17 11:02:10 2006 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) 2004-2006 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
37# include <cstdlib> 27# include <cstdlib>
38#endif 28# include <cstring>
29
39#ifdef HAVE_SYS_TYPES_H 30#ifdef HAVE_SYS_TYPES_H
40# include <sys/types.h> 31# include <sys/types.h>
41#endif 32#endif
42#ifdef HAVE_UNISTD_H 33#ifdef HAVE_UNISTD_H
43# include <unistd.h> 34# include <unistd.h>
44#endif 35#endif
45#if defined(HAVE_STRING_H)
46# include <cstring>
47#endif
48#ifdef HAVE_FCNTL_H 36#ifdef HAVE_FCNTL_H
49# include <fcntl.h> 37# include <fcntl.h>
50#endif 38#endif
51#ifdef HAVE_SYS_IOCTL_H 39#ifdef HAVE_SYS_IOCTL_H
52# include <sys/ioctl.h> 40# include <sys/ioctl.h>
53#endif 41#endif
54#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 42#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
55# include <sys/stropts.h> /* for I_PUSH */ 43# include <sys/stropts.h> /* for I_PUSH */
56#endif 44#endif
57#ifdef HAVE_ISASTREAM 45#ifdef HAVE_ISASTREAM
58# include <stropts.h> 46# include <stropts.h>
59#endif 47#endif
60 48#if defined(HAVE_PTY_H)
61#ifdef DEBUG_TTY 49# include <pty.h>
62# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr) 50#elif defined(HAVE_LIBUTIL_H)
63#else 51# include <libutil.h>
64# define D_TTY(x) 52#elif defined(HAVE_UTIL_H)
53# include <util.h>
65#endif 54#endif
55
56#include <cstdio>
57#include <grp.h>
58
59/////////////////////////////////////////////////////////////////////////////
66 60
67/* ------------------------------------------------------------------------- * 61/* ------------------------------------------------------------------------- *
68 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 62 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
69 * ------------------------------------------------------------------------- */ 63 * ------------------------------------------------------------------------- */
70/* 64/*
71 * Returns pty file descriptor, or -1 on failure 65 * Returns pty file descriptor, or -1 on failure
72 * If successful, ttydev is set to the name of the slave device. 66 * If successful, ttydev is set to the name of the slave device.
73 * fd_tty _may_ also be set to an open fd to the slave device 67 * fd_tty _may_ also be set to an open fd to the slave device
74 */ 68 */
75/* EXTPROTO */ 69static int
76int
77rxvt_get_pty (int *fd_tty, const char **ttydev) 70get_pty (int *fd_tty, char **ttydev)
78{ 71{
79 int pfd; 72 int pfd;
80 73
81#ifdef PTYS_ARE_OPENPTY 74#ifdef PTYS_ARE_OPENPTY
82
83 char tty_name[sizeof "/dev/pts/????\0"]; 75 char tty_name[sizeof "/dev/pts/????\0"];
84 76
77 rxvt_privileges(RESTORE);
85 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 78 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
79 rxvt_privileges(IGNORE);
80
81 if (res != -1)
86 { 82 {
87 *ttydev = strdup (tty_name); 83 *ttydev = strdup (tty_name);
88 return pfd; 84 return pfd;
89 } 85 }
90#endif 86#endif
… …
93 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 89 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
94 if (*ttydev != NULL) 90 if (*ttydev != NULL)
95 return pfd; 91 return pfd;
96#endif 92#endif
97 93
98#ifdef PTYS_ARE_GETPTY
99
100 char *ptydev;
101
102 while ((ptydev = getpty ()) != NULL)
103 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
104 {
105 *ttydev = ptydev;
106 return pfd;
107 }
108#endif
109
110#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 94#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
111# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) 95# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
112 96
113 { 97 {
114# ifdef PTYS_ARE_GETPT 98# ifdef PTYS_ARE_GETPT
115 pfd = getpt (); 99 pfd = getpt();
116# else 100# else
117 101# ifdef PTYS_ARE_POSIX
102 pfd = posix_openpt (O_RDWR);
103# else
118 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 104 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
105# endif
119# endif 106# endif
120 107
121 if (pfd >= 0) 108 if (pfd >= 0)
122 { 109 {
123 if (grantpt (pfd) == 0 /* change slave permissions */ 110 if (grantpt (pfd) == 0 /* change slave permissions */
124 && unlockpt (pfd) == 0) 111 && unlockpt (pfd) == 0)
125 { /* slave now unlocked */ 112 { /* slave now unlocked */
126 *ttydev = ptsname (pfd); /* get slave's name */ 113 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
127 return pfd; 114 return pfd;
128 } 115 }
129 close (pfd); 116 close (pfd);
130 } 117 }
131 } 118 }
… …
133#endif 120#endif
134 121
135#ifdef PTYS_ARE_PTC 122#ifdef PTYS_ARE_PTC
136 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 123 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
137 { 124 {
138 *ttydev = ttyname (pfd); 125 *ttydev = strdup (ttyname (pfd));
139 return pfd; 126 return pfd;
140 } 127 }
141#endif 128#endif
142 129
143#ifdef PTYS_ARE_CLONE 130#ifdef PTYS_ARE_CLONE
144 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 131 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
145 { 132 {
146 *ttydev = ptsname (pfd); 133 *ttydev = strdup (ptsname (pfd));
147 return pfd; 134 return pfd;
148 } 135 }
149#endif 136#endif
150 137
151#ifdef PTYS_ARE_NUMERIC 138#ifdef PTYS_ARE_NUMERIC
152 { 139 {
153 int idx; 140 int idx;
154 char *c1, *c2; 141 char *c1, *c2;
155 char pty_name[] = "/dev/ptyp???"; 142 char pty_name[] = "/dev/ptyp???";
156 char tty_name[] = "/dev/ttyp???"; 143 char tty_name[] = "/dev/ttyp???";
157 144
158 c1 = & (pty_name[sizeof (pty_name) - 4]); 145 c1 = &(pty_name[sizeof (pty_name) - 4]);
159 c2 = & (tty_name[sizeof (tty_name) - 4]); 146 c2 = &(tty_name[sizeof (tty_name) - 4]);
160 for (idx = 0; idx < 256; idx++) 147 for (idx = 0; idx < 256; idx++)
161 { 148 {
162 sprintf (c1, "%d", idx); 149 sprintf (c1, "%d", idx);
163 sprintf (c2, "%d", idx); 150 sprintf (c2, "%d", idx);
164 if (access (tty_name, F_OK) < 0) 151 if (access (tty_name, F_OK) < 0)
165 { 152 {
166 idx = 256; 153 idx = 256;
167 break; 154 break;
168 } 155 }
156
169 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 157 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
170 { 158 {
171 if (access (tty_name, R_OK | W_OK) == 0) 159 if (access (tty_name, R_OK | W_OK) == 0)
172 { 160 {
173 *ttydev = strdup (tty_name); 161 *ttydev = strdup (tty_name);
174 return pfd; 162 return pfd;
175 } 163 }
164
176 close (pfd); 165 close (pfd);
177 } 166 }
178 } 167 }
179 } 168 }
180#endif 169#endif
170
181#ifdef PTYS_ARE_SEARCHED 171#ifdef PTYS_ARE_SEARCHED
182 { 172 {
183 const char *c1, *c2; 173 const char *c1, *c2;
184 char pty_name[] = "/dev/pty??"; 174 char pty_name[] = "/dev/pty??";
185 char tty_name[] = "/dev/tty??"; 175 char tty_name[] = "/dev/tty??";
186 176
187# ifndef PTYCHAR1 177# ifndef PTYCHAR1
188# define PTYCHAR1 "pqrstuvwxyz" 178# define PTYCHAR1 "pqrstuvwxyz"
189# endif 179# endif
190# ifndef PTYCHAR2 180# ifndef PTYCHAR2
… …
204 if (access (tty_name, R_OK | W_OK) == 0) 194 if (access (tty_name, R_OK | W_OK) == 0)
205 { 195 {
206 *ttydev = strdup (tty_name); 196 *ttydev = strdup (tty_name);
207 return pfd; 197 return pfd;
208 } 198 }
199
209 close (pfd); 200 close (pfd);
210 } 201 }
211 } 202 }
212 } 203 }
213 } 204 }
214#endif 205#endif
206
215 return -1; 207 return -1;
216} 208}
217 209
218/*----------------------------------------------------------------------*/ 210/*----------------------------------------------------------------------*/
219/* 211/*
220 * Returns tty file descriptor, or -1 on failure 212 * Returns tty file descriptor, or -1 on failure
221 */ 213 */
222/* EXTPROTO */ 214static int
223int
224rxvt_get_tty (const char *ttydev) 215get_tty (char *ttydev)
225{ 216{
226 return open (ttydev, O_RDWR | O_NOCTTY, 0); 217 return open (ttydev, O_RDWR | O_NOCTTY, 0);
227} 218}
228 219
229/*----------------------------------------------------------------------*/ 220/*----------------------------------------------------------------------*/
230/* 221/*
231 * Make our tty a controlling tty so that /dev/tty points to us 222 * Make our tty a controlling tty so that /dev/tty points to us
232 */ 223 */
233/* EXTPROTO */ 224static int
234int 225control_tty (int fd_tty)
235rxvt_control_tty (int fd_tty, const char *ttydev)
236{ 226{
237#ifndef __QNX__
238 int fd; 227 int fd;
239 228
240 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
241 /* ---------------------------------------- */ 229 /* ---------------------------------------- */
242# ifdef HAVE_SETSID 230# ifdef HAVE_SETSID
243 setsid (); 231 setsid ();
244# endif 232# endif
245# if defined(HAVE_SETPGID) 233# if defined(HAVE_SETPGID)
246 setpgid (0, 0); 234 setpgid (0, 0);
247# elif defined(HAVE_SETPGRP) 235# elif defined(HAVE_SETPGRP)
248 setpgrp (0, 0); 236 setpgrp (0, 0);
249# endif 237# endif
238
250 /* ---------------------------------------- */ 239 /* ---------------------------------------- */
251# ifdef TIOCNOTTY 240# ifdef TIOCNOTTY
252
253 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 241 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
254 D_TTY ((stderr, "rxvt_control_tty (): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
255 if (fd >= 0) 242 if (fd >= 0)
256 { 243 {
257 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ 244 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
258 close (fd); 245 close (fd);
259 } 246 }
260# endif 247# endif
248
261 /* ---------------------------------------- */ 249 /* ---------------------------------------- */
262 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 250 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
263 D_TTY ((stderr, "rxvt_control_tty (): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
264 if (fd >= 0) 251 if (fd >= 0)
265 close (fd); /* ouch: still have controlling tty */ 252 close (fd); /* ouch: still have controlling tty */
253
266 /* ---------------------------------------- */ 254 /* ---------------------------------------- */
267#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 255# if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
268 /* 256 /*
269 * Push STREAMS modules: 257 * Push STREAMS modules:
270 * ptem: pseudo-terminal hardware emulation module. 258 * ptem: pseudo-terminal hardware emulation module.
271 * ldterm: standard terminal line discipline. 259 * ldterm: standard terminal line discipline.
272 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 260 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
280 * documentation is really unclear about whether it is any close () on 268 * documentation is really unclear about whether it is any close () on
281 * the master side or the last close () - i.e. a proper STREAMS dismantling 269 * the master side or the last close () - i.e. a proper STREAMS dismantling
282 * close () - on the master side which causes a hang up to be sent 270 * close () - on the master side which causes a hang up to be sent
283 * through - Geoff Wing 271 * through - Geoff Wing
284 */ 272 */
285# ifdef HAVE_ISASTREAM 273# ifdef HAVE_ISASTREAM
286 if (isastream (fd_tty) == 1) 274 if (isastream (fd_tty) == 1)
287# endif 275# endif
288 { 276 {
289 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
290 ioctl (fd_tty, I_PUSH, "ptem"); 277 ioctl (fd_tty, I_PUSH, "ptem");
291 ioctl (fd_tty, I_PUSH, "ldterm"); 278 ioctl (fd_tty, I_PUSH, "ldterm");
292 ioctl (fd_tty, I_PUSH, "ttcompat"); 279 ioctl (fd_tty, I_PUSH, "ttcompat");
293 } 280 }
294#endif 281# endif
295 /* ---------------------------------------- */ 282 /* ---------------------------------------- */
296# if defined(TIOCSCTTY)
297 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 283 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
298 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd));
299# elif defined(TIOCSETCTTY)
300 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
301 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
302# else
303 fd = open (ttydev, O_RDWR);
304 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
305 if (fd >= 0)
306 close (fd);
307# endif
308 /* ---------------------------------------- */ 284 /* ---------------------------------------- */
309 fd = open ("/dev/tty", O_WRONLY); 285 fd = open ("/dev/tty", O_WRONLY);
310 D_TTY ((stderr, "rxvt_control_tty (): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
311 if (fd < 0) 286 if (fd < 0)
312 return -1; /* fatal */ 287 return -1; /* fatal */
313 close (fd); 288 close (fd);
314 /* ---------------------------------------- */ 289 /* ---------------------------------------- */
315 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
316 /* ---------------------------------------- */
317#endif /* ! __QNX__ */
318 290
319 return 0; 291 return 0;
320} 292}
293
294void
295rxvt_ptytty::close_tty ()
296{
297 if (tty < 0)
298 return;
299
300 close (tty);
301 tty = -1;
302}
303
304bool
305rxvt_ptytty::make_controlling_tty ()
306{
307 return control_tty (tty) >= 0;
308}
309
310void
311rxvt_ptytty::set_utf8_mode (bool on)
312{
313#ifdef IUTF8
314 if (pty < 0)
315 return;
316
317 struct termios tio;
318
319 if (tcgetattr (pty, &tio) != -1)
320 {
321 tcflag_t new_cflag = tio.c_iflag;
322
323 if (on)
324 new_cflag |= IUTF8;
325 else
326 new_cflag &= ~IUTF8;
327
328 if (new_cflag != tio.c_iflag)
329 {
330 tio.c_iflag = new_cflag;
331 tcsetattr (pty, TCSANOW, &tio);
332 }
333 }
334#endif
335}
336
337/////////////////////////////////////////////////////////////////////////////
338
339#ifndef NO_SETOWNER_TTYDEV
340static struct ttyconf {
341 gid_t gid;
342 mode_t mode;
343
344 ttyconf ()
345 {
346#ifdef TTY_GID_SUPPORT
347 struct group *gr = getgrnam ("tty");
348
349 if (gr)
350 { /* change group ownership of tty to "tty" */
351 mode = S_IRUSR | S_IWUSR | S_IWGRP;
352 gid = gr->gr_gid;
353 }
354 else
355#endif /* TTY_GID_SUPPORT */
356 {
357 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
358 gid = getgid ();
359 }
360 }
361} ttyconf;
362
363/////////////////////////////////////////////////////////////////////////////
364
365void
366rxvt_ptytty_unix::privileges (rxvt_privaction action)
367{
368 if (!name || !*name)
369 return;
370
371 rxvt_privileges (RESTORE);
372
373 if (action == SAVE)
374 {
375# ifndef RESET_TTY_TO_COMMON_DEFAULTS
376 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
377 if (lstat (name, &savestat) < 0) /* you lose out */
378 ;
379 else
380# endif
381 {
382 saved = true;
383 chown (name, getuid (), ttyconf.gid); /* fail silently */
384 chmod (name, ttyconf.mode);
385# ifdef HAVE_REVOKE
386 revoke (name);
387# endif
388 }
389 }
390 else
391 { /* action == RESTORE */
392# ifndef RESET_TTY_TO_COMMON_DEFAULTS
393 if (saved)
394 {
395 chmod (name, savestat.st_mode);
396 chown (name, savestat.st_uid, savestat.st_gid);
397 }
398# else
399 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
400 chown (name, 0, 0);
401# endif
402
403 }
404
405 rxvt_privileges (IGNORE);
406}
407#endif
408
409rxvt_ptytty_unix::rxvt_ptytty_unix ()
410{
411 pty = tty = -1;
412 name = 0;
413#ifndef NO_SETOWNER_TTYDEV
414 saved = false;
415#endif
416#if UTMP_SUPPORT
417 cmd_pid = 0;
418#endif
419}
420
421rxvt_ptytty_unix::~rxvt_ptytty_unix ()
422{
423 logout ();
424 put ();
425}
426
427void
428rxvt_ptytty_unix::put ()
429{
430#ifndef NO_SETOWNER_TTYDEV
431 privileges (RESTORE);
432#endif
433
434 if (pty >= 0) close (pty);
435 close_tty ();
436 free (name);
437
438 pty = tty = -1;
439 name = 0;
440}
441
442bool
443rxvt_ptytty_unix::get ()
444{
445 /* get master (pty) */
446 if ((pty = get_pty (&tty, &name)) < 0)
447 return false;
448
449 fcntl (pty, F_SETFL, O_NONBLOCK);
450
451 /* get slave (tty) */
452 if (tty < 0)
453 {
454#ifndef NO_SETOWNER_TTYDEV
455 privileges (SAVE);
456#endif
457
458 if ((tty = get_tty (name)) < 0)
459 {
460 put ();
461 return false;
462 }
463 }
464
465 return true;
466}
467
321/*----------------------- end-of-file (C source) -----------------------*/ 468/*----------------------- end-of-file (C source) -----------------------*/
469

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