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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 1.39 by root, Tue Jan 17 12:22:59 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#include "ptytty.h"
60
61/////////////////////////////////////////////////////////////////////////////
66 62
67/* ------------------------------------------------------------------------- * 63/* ------------------------------------------------------------------------- *
68 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 64 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
69 * ------------------------------------------------------------------------- */ 65 * ------------------------------------------------------------------------- */
70/* 66/*
71 * Returns pty file descriptor, or -1 on failure 67 * Returns pty file descriptor, or -1 on failure
72 * If successful, ttydev is set to the name of the slave device. 68 * 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 69 * fd_tty _may_ also be set to an open fd to the slave device
74 */ 70 */
75/* EXTPROTO */ 71static int
76int
77rxvt_get_pty (int *fd_tty, const char **ttydev) 72get_pty (int *fd_tty, char **ttydev)
78{ 73{
79 int pfd; 74 int pfd;
80 75
81#ifdef PTYS_ARE_OPENPTY 76#ifdef PTYS_ARE_OPENPTY
82
83 char tty_name[sizeof "/dev/pts/????\0"]; 77 char tty_name[sizeof "/dev/pts/????\0"];
84 78
79 rxvt_privileges(RESTORE);
85 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 80 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
81 rxvt_privileges(IGNORE);
82
83 if (res != -1)
86 { 84 {
87 *ttydev = strdup (tty_name); 85 *ttydev = strdup (tty_name);
88 return pfd; 86 return pfd;
89 } 87 }
90#endif 88#endif
… …
93 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 91 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
94 if (*ttydev != NULL) 92 if (*ttydev != NULL)
95 return pfd; 93 return pfd;
96#endif 94#endif
97 95
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) 96#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
111# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) 97# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
112 98
113 { 99 {
114# ifdef PTYS_ARE_GETPT 100# ifdef PTYS_ARE_GETPT
115 pfd = getpt (); 101 pfd = getpt();
116# else 102# else
117 103# ifdef PTYS_ARE_POSIX
104 pfd = posix_openpt (O_RDWR);
105# else
118 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 106 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
107# endif
119# endif 108# endif
120 109
121 if (pfd >= 0) 110 if (pfd >= 0)
122 { 111 {
123 if (grantpt (pfd) == 0 /* change slave permissions */ 112 if (grantpt (pfd) == 0 /* change slave permissions */
124 && unlockpt (pfd) == 0) 113 && unlockpt (pfd) == 0)
125 { /* slave now unlocked */ 114 { /* slave now unlocked */
126 *ttydev = ptsname (pfd); /* get slave's name */ 115 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
127 return pfd; 116 return pfd;
128 } 117 }
129 close (pfd); 118 close (pfd);
130 } 119 }
131 } 120 }
… …
133#endif 122#endif
134 123
135#ifdef PTYS_ARE_PTC 124#ifdef PTYS_ARE_PTC
136 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 125 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
137 { 126 {
138 *ttydev = ttyname (pfd); 127 *ttydev = strdup (ttyname (pfd));
139 return pfd; 128 return pfd;
140 } 129 }
141#endif 130#endif
142 131
143#ifdef PTYS_ARE_CLONE 132#ifdef PTYS_ARE_CLONE
144 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 133 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
145 { 134 {
146 *ttydev = ptsname (pfd); 135 *ttydev = strdup (ptsname (pfd));
147 return pfd; 136 return pfd;
148 } 137 }
149#endif 138#endif
150 139
151#ifdef PTYS_ARE_NUMERIC 140#ifdef PTYS_ARE_NUMERIC
152 { 141 {
153 int idx; 142 int idx;
154 char *c1, *c2; 143 char *c1, *c2;
155 char pty_name[] = "/dev/ptyp???"; 144 char pty_name[] = "/dev/ptyp???";
156 char tty_name[] = "/dev/ttyp???"; 145 char tty_name[] = "/dev/ttyp???";
157 146
158 c1 = & (pty_name[sizeof (pty_name) - 4]); 147 c1 = &(pty_name[sizeof (pty_name) - 4]);
159 c2 = & (tty_name[sizeof (tty_name) - 4]); 148 c2 = &(tty_name[sizeof (tty_name) - 4]);
160 for (idx = 0; idx < 256; idx++) 149 for (idx = 0; idx < 256; idx++)
161 { 150 {
162 sprintf (c1, "%d", idx); 151 sprintf (c1, "%d", idx);
163 sprintf (c2, "%d", idx); 152 sprintf (c2, "%d", idx);
164 if (access (tty_name, F_OK) < 0) 153 if (access (tty_name, F_OK) < 0)
165 { 154 {
166 idx = 256; 155 idx = 256;
167 break; 156 break;
168 } 157 }
158
169 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 159 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
170 { 160 {
171 if (access (tty_name, R_OK | W_OK) == 0) 161 if (access (tty_name, R_OK | W_OK) == 0)
172 { 162 {
173 *ttydev = strdup (tty_name); 163 *ttydev = strdup (tty_name);
174 return pfd; 164 return pfd;
175 } 165 }
166
176 close (pfd); 167 close (pfd);
177 } 168 }
178 } 169 }
179 } 170 }
180#endif 171#endif
172
181#ifdef PTYS_ARE_SEARCHED 173#ifdef PTYS_ARE_SEARCHED
182 { 174 {
183 const char *c1, *c2; 175 const char *c1, *c2;
184 char pty_name[] = "/dev/pty??"; 176 char pty_name[] = "/dev/pty??";
185 char tty_name[] = "/dev/tty??"; 177 char tty_name[] = "/dev/tty??";
186 178
187# ifndef PTYCHAR1 179# ifndef PTYCHAR1
188# define PTYCHAR1 "pqrstuvwxyz" 180# define PTYCHAR1 "pqrstuvwxyz"
189# endif 181# endif
190# ifndef PTYCHAR2 182# ifndef PTYCHAR2
… …
204 if (access (tty_name, R_OK | W_OK) == 0) 196 if (access (tty_name, R_OK | W_OK) == 0)
205 { 197 {
206 *ttydev = strdup (tty_name); 198 *ttydev = strdup (tty_name);
207 return pfd; 199 return pfd;
208 } 200 }
201
209 close (pfd); 202 close (pfd);
210 } 203 }
211 } 204 }
212 } 205 }
213 } 206 }
214#endif 207#endif
208
215 return -1; 209 return -1;
216} 210}
217 211
218/*----------------------------------------------------------------------*/ 212/*----------------------------------------------------------------------*/
219/* 213/*
220 * Returns tty file descriptor, or -1 on failure 214 * Returns tty file descriptor, or -1 on failure
221 */ 215 */
222/* EXTPROTO */ 216static int
223int
224rxvt_get_tty (const char *ttydev) 217get_tty (char *ttydev)
225{ 218{
226 return open (ttydev, O_RDWR | O_NOCTTY, 0); 219 return open (ttydev, O_RDWR | O_NOCTTY, 0);
227} 220}
228 221
229/*----------------------------------------------------------------------*/ 222/*----------------------------------------------------------------------*/
230/* 223/*
231 * Make our tty a controlling tty so that /dev/tty points to us 224 * Make our tty a controlling tty so that /dev/tty points to us
232 */ 225 */
233/* EXTPROTO */ 226static int
234int 227control_tty (int fd_tty)
235rxvt_control_tty (int fd_tty, const char *ttydev)
236{ 228{
237#ifndef __QNX__
238 int fd; 229 int fd;
239 230
240 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
241 /* ---------------------------------------- */ 231 /* ---------------------------------------- */
242# ifdef HAVE_SETSID
243 setsid (); 232 setsid ();
244# endif 233
245# if defined(HAVE_SETPGID)
246 setpgid (0, 0);
247# elif defined(HAVE_SETPGRP)
248 setpgrp (0, 0);
249# endif
250 /* ---------------------------------------- */ 234 /* ---------------------------------------- */
251# ifdef TIOCNOTTY
252
253 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)
256 {
257 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
258 close (fd);
259 }
260# endif
261 /* ---------------------------------------- */
262 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)
265 close (fd); /* ouch: still have controlling tty */
266 /* ---------------------------------------- */
267#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 235# if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
268 /* 236 /*
269 * Push STREAMS modules: 237 * Push STREAMS modules:
270 * ptem: pseudo-terminal hardware emulation module. 238 * ptem: pseudo-terminal hardware emulation module.
271 * ldterm: standard terminal line discipline. 239 * ldterm: standard terminal line discipline.
272 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 240 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
280 * documentation is really unclear about whether it is any close () on 248 * 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 249 * 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 250 * close () - on the master side which causes a hang up to be sent
283 * through - Geoff Wing 251 * through - Geoff Wing
284 */ 252 */
285# ifdef HAVE_ISASTREAM 253# ifdef HAVE_ISASTREAM
286 if (isastream (fd_tty) == 1) 254 if (isastream (fd_tty) == 1)
287# endif 255# endif
288 { 256 {
289 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
290 ioctl (fd_tty, I_PUSH, "ptem"); 257 ioctl (fd_tty, I_PUSH, "ptem");
291 ioctl (fd_tty, I_PUSH, "ldterm"); 258 ioctl (fd_tty, I_PUSH, "ldterm");
292 ioctl (fd_tty, I_PUSH, "ttcompat"); 259 ioctl (fd_tty, I_PUSH, "ttcompat");
293 } 260 }
294#endif 261# endif
295 /* ---------------------------------------- */ 262 /* ---------------------------------------- */
296# if defined(TIOCSCTTY)
297 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 263 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 /* ---------------------------------------- */ 264 /* ---------------------------------------- */
309 fd = open ("/dev/tty", O_WRONLY); 265 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) 266 if (fd < 0)
312 return -1; /* fatal */ 267 return -1; /* fatal */
313 close (fd); 268 close (fd);
314 /* ---------------------------------------- */ 269 /* ---------------------------------------- */
315 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
316 /* ---------------------------------------- */
317#endif /* ! __QNX__ */
318 270
319 return 0; 271 return 0;
320} 272}
273
274void
275rxvt_ptytty::close_tty ()
276{
277 if (tty < 0)
278 return;
279
280 close (tty);
281 tty = -1;
282}
283
284bool
285rxvt_ptytty::make_controlling_tty ()
286{
287 return control_tty (tty) >= 0;
288}
289
290void
291rxvt_ptytty::set_utf8_mode (bool on)
292{
293#ifdef IUTF8
294 if (pty < 0)
295 return;
296
297 struct termios tio;
298
299 if (tcgetattr (pty, &tio) != -1)
300 {
301 tcflag_t new_cflag = tio.c_iflag;
302
303 if (on)
304 new_cflag |= IUTF8;
305 else
306 new_cflag &= ~IUTF8;
307
308 if (new_cflag != tio.c_iflag)
309 {
310 tio.c_iflag = new_cflag;
311 tcsetattr (pty, TCSANOW, &tio);
312 }
313 }
314#endif
315}
316
317/////////////////////////////////////////////////////////////////////////////
318
319#ifndef NO_SETOWNER_TTYDEV
320static struct ttyconf {
321 gid_t gid;
322 mode_t mode;
323
324 ttyconf ()
325 {
326#ifdef TTY_GID_SUPPORT
327 struct group *gr = getgrnam ("tty");
328
329 if (gr)
330 { /* change group ownership of tty to "tty" */
331 mode = S_IRUSR | S_IWUSR | S_IWGRP;
332 gid = gr->gr_gid;
333 }
334 else
335#endif /* TTY_GID_SUPPORT */
336 {
337 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
338 gid = getgid ();
339 }
340 }
341} ttyconf;
342
343/////////////////////////////////////////////////////////////////////////////
344
345void
346rxvt_ptytty_unix::privileges (rxvt_privaction action)
347{
348 if (!name || !*name)
349 return;
350
351 rxvt_privileges (RESTORE);
352
353 if (action == SAVE)
354 {
355# ifndef RESET_TTY_TO_COMMON_DEFAULTS
356 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
357 if (lstat (name, &savestat) < 0) /* you lose out */
358 ;
359 else
360# endif
361 {
362 saved = true;
363 chown (name, getuid (), ttyconf.gid); /* fail silently */
364 chmod (name, ttyconf.mode);
365# ifdef HAVE_REVOKE
366 revoke (name);
367# endif
368 }
369 }
370 else
371 { /* action == RESTORE */
372# ifndef RESET_TTY_TO_COMMON_DEFAULTS
373 if (saved)
374 {
375 chmod (name, savestat.st_mode);
376 chown (name, savestat.st_uid, savestat.st_gid);
377 }
378# else
379 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
380 chown (name, 0, 0);
381# endif
382
383 }
384
385 rxvt_privileges (IGNORE);
386}
387#endif
388
389rxvt_ptytty_unix::rxvt_ptytty_unix ()
390{
391 pty = tty = -1;
392 name = 0;
393#ifndef NO_SETOWNER_TTYDEV
394 saved = false;
395#endif
396#if UTMP_SUPPORT
397 cmd_pid = 0;
398#endif
399}
400
401rxvt_ptytty_unix::~rxvt_ptytty_unix ()
402{
403 logout ();
404 put ();
405}
406
407void
408rxvt_ptytty_unix::put ()
409{
410#ifndef NO_SETOWNER_TTYDEV
411 privileges (RESTORE);
412#endif
413
414 if (pty >= 0) close (pty);
415 close_tty ();
416 free (name);
417
418 pty = tty = -1;
419 name = 0;
420}
421
422bool
423rxvt_ptytty_unix::get ()
424{
425 /* get master (pty) */
426 if ((pty = get_pty (&tty, &name)) < 0)
427 return false;
428
429 fcntl (pty, F_SETFL, O_NONBLOCK);
430
431 /* get slave (tty) */
432 if (tty < 0)
433 {
434#ifndef NO_SETOWNER_TTYDEV
435 privileges (SAVE);
436#endif
437
438 if ((tty = get_tty (name)) < 0)
439 {
440 put ();
441 return false;
442 }
443 }
444
445 return true;
446}
447
448// a "factory" *g*
449rxvt_ptytty *rxvt_new_ptytty ()
450{
451 return new rxvt_ptytty_unix;
452}
453
321/*----------------------- end-of-file (C source) -----------------------*/ 454/*----------------------- end-of-file (C source) -----------------------*/
455

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