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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.39 by root, Tue Jan 17 12:22:59 2006 UTC vs.
Revision 1.70 by sf-exg, Wed Jul 21 08:46:13 2010 UTC

1// This file is part of libptytty. Do not make local modifications.
2// http://software.schmorp.de/pkg/libptytty
3
1/*--------------------------------*-C-*---------------------------------* 4/*----------------------------------------------------------------------*
2 * File: ptytty.C 5 * File: ptytty.C
3 *----------------------------------------------------------------------* 6 *----------------------------------------------------------------------*
4 * 7 *
5 * All portions of code are copyright by their respective author/s. 8 * All portions of code are copyright by their respective author/s.
6 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> 9 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com>
7 * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com> 10 * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com>
11 * Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it>
8 * 12 *
9 * This program is free software; you can redistribute it and/or modify 13 * 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 14 * 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 15 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version. 16 * (at your option) any later version.
… …
19 * You should have received a copy of the GNU General Public License 23 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software 24 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *---------------------------------------------------------------------*/ 26 *---------------------------------------------------------------------*/
23 27
24#include "../config.h" /* NECESSARY */ 28#include "config.h"
29
25#include "rxvt.h" 30#include "ptytty.h"
26 31
27# include <cstdlib> 32#include <cstdlib>
28# include <cstring> 33#include <cstring>
34#include <csignal>
29 35
30#ifdef HAVE_SYS_TYPES_H
31# include <sys/types.h> 36#include <sys/types.h>
32#endif 37#include <sys/stat.h>
33#ifdef HAVE_UNISTD_H
34# include <unistd.h> 38#include <unistd.h>
35#endif
36#ifdef HAVE_FCNTL_H
37# include <fcntl.h> 39#include <fcntl.h>
38#endif 40
39#ifdef HAVE_SYS_IOCTL_H 41#ifdef HAVE_SYS_IOCTL_H
40# include <sys/ioctl.h> 42# include <sys/ioctl.h>
41#endif 43#endif
42#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 44#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
43# include <sys/stropts.h> /* for I_PUSH */ 45# include <sys/stropts.h> /* for I_PUSH */
44#endif 46#endif
45#ifdef HAVE_ISASTREAM 47#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
46# include <stropts.h> 48# include <stropts.h>
47#endif 49#endif
48#if defined(HAVE_PTY_H) 50#if defined(HAVE_PTY_H)
49# include <pty.h> 51# include <pty.h>
50#elif defined(HAVE_LIBUTIL_H) 52#elif defined(HAVE_LIBUTIL_H)
51# include <libutil.h> 53# include <libutil.h>
52#elif defined(HAVE_UTIL_H) 54#elif defined(HAVE_UTIL_H)
53# include <util.h> 55# include <util.h>
54#endif 56#endif
57#ifdef TTY_GID_SUPPORT
58#include <grp.h>
59#endif
55 60
56#include <cstdio> 61#include <cstdio>
57#include <grp.h>
58
59#include "ptytty.h"
60 62
61///////////////////////////////////////////////////////////////////////////// 63/////////////////////////////////////////////////////////////////////////////
62 64
63/* ------------------------------------------------------------------------- * 65/* ------------------------------------------------------------------------- *
64 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 66 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
65 * ------------------------------------------------------------------------- */ 67 * ------------------------------------------------------------------------- */
66/* 68/*
67 * Returns pty file descriptor, or -1 on failure 69 * Returns pty file descriptor, or -1 on failure
68 * 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.
69 * 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
70 */ 72 */
73#if defined(UNIX98_PTY)
74
71static int 75 static int
72get_pty (int *fd_tty, char **ttydev) 76 get_pty (int *fd_tty, char **ttydev)
73{
74 int pfd;
75
76#ifdef PTYS_ARE_OPENPTY
77 char tty_name[sizeof "/dev/pts/????\0"];
78
79 rxvt_privileges(RESTORE);
80 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
81 rxvt_privileges(IGNORE);
82
83 if (res != -1)
84 {
85 *ttydev = strdup (tty_name);
86 return pfd;
87 }
88#endif
89
90#ifdef PTYS_ARE__GETPTY
91 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
92 if (*ttydev != NULL)
93 return pfd;
94#endif
95
96#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
97# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
98
99 { 77 {
100# ifdef PTYS_ARE_GETPT 78 int pfd;
79
80# if defined(HAVE_GETPT)
101 pfd = getpt(); 81 pfd = getpt();
102# else 82# elif defined(HAVE_POSIX_OPENPT)
103# ifdef PTYS_ARE_POSIX
104 pfd = posix_openpt (O_RDWR); 83 pfd = posix_openpt (O_RDWR);
105# else 84# else
106 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 85 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
107# endif 86# endif
108# endif
109 87
110 if (pfd >= 0) 88 if (pfd >= 0)
111 { 89 {
112 if (grantpt (pfd) == 0 /* change slave permissions */ 90 if (grantpt (pfd) == 0 /* change slave permissions */
113 && unlockpt (pfd) == 0) 91 && unlockpt (pfd) == 0)
92 {
114 { /* slave now unlocked */ 93 /* slave now unlocked */
115 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 94 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
116 return pfd; 95 return pfd;
117 } 96 }
97
118 close (pfd); 98 close (pfd);
119 } 99 }
100
101 return -1;
120 } 102 }
121# endif
122#endif
123 103
124#ifdef PTYS_ARE_PTC 104#elif defined(HAVE_OPENPTY)
125 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
126 {
127 *ttydev = strdup (ttyname (pfd));
128 return pfd;
129 }
130#endif
131 105
132#ifdef PTYS_ARE_CLONE 106 static int
133 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 107 get_pty (int *fd_tty, char **ttydev)
134 {
135 *ttydev = strdup (ptsname (pfd));
136 return pfd;
137 }
138#endif
139
140#ifdef PTYS_ARE_NUMERIC
141 { 108 {
142 int idx; 109 int pfd;
143 char *c1, *c2; 110 int res;
144 char pty_name[] = "/dev/ptyp???";
145 char tty_name[] = "/dev/ttyp???";
146 111
147 c1 = &(pty_name[sizeof (pty_name) - 4]); 112 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
148 c2 = &(tty_name[sizeof (tty_name) - 4]); 113
149 for (idx = 0; idx < 256; idx++) 114 if (res != -1)
150 { 115 {
151 sprintf (c1, "%d", idx); 116 *ttydev = strdup (ttyname (*fd_tty));
152 sprintf (c2, "%d", idx); 117 return pfd;
153 if (access (tty_name, F_OK) < 0) 118 }
119
120 return -1;
121 }
122
123#elif defined(HAVE__GETPTY)
124
125 static int
126 get_pty (int *fd_tty, char **ttydev)
127 {
128 int pfd;
129 char *slave;
130
131 slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
132
133 if (slave != NULL)
134 {
135 *ttydev = strdup (slave);
136 return pfd;
137 }
138
139 return -1;
140 }
141
142#else
143
144 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
145 static int
146 get_pty (int *fd_tty, char **ttydev)
147 {
148 int pfd;
149 int i;
150 char pty_name[32];
151 char tty_name[32];
152 const char *majors = "pqrstuvwxyzabcde";
153 const char *minors = "0123456789abcdef";
154
155 for (i = 0; i < 256; i++)
156 {
157 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
158 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
159
160 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
154 { 161 {
155 idx = 256; 162 snprintf(pty_name, 32, "/dev/ptyp%d", i);
156 break; 163 snprintf(tty_name, 32, "/dev/ttyp%d", i);
164 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
165 continue;
157 } 166 }
158 167
159 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 168 if (access (tty_name, R_OK | W_OK) == 0)
160 { 169 {
161 if (access (tty_name, R_OK | W_OK) == 0)
162 {
163 *ttydev = strdup (tty_name); 170 *ttydev = strdup (tty_name);
164 return pfd; 171 return pfd;
165 }
166
167 close (pfd);
168 } 172 }
173
174 close (pfd);
169 } 175 }
176
177 return -1;
170 } 178 }
171#endif
172 179
173#ifdef PTYS_ARE_SEARCHED
174 {
175 const char *c1, *c2;
176 char pty_name[] = "/dev/pty??";
177 char tty_name[] = "/dev/tty??";
178
179# ifndef PTYCHAR1
180# define PTYCHAR1 "pqrstuvwxyz"
181# endif 180#endif
182# ifndef PTYCHAR2
183# define PTYCHAR2 "0123456789abcdef"
184# endif
185
186 for (c1 = PTYCHAR1; *c1; c1++)
187 {
188 pty_name[ (sizeof (pty_name) - 3)] =
189 tty_name[ (sizeof (pty_name) - 3)] = *c1;
190 for (c2 = PTYCHAR2; *c2; c2++)
191 {
192 pty_name[ (sizeof (pty_name) - 2)] =
193 tty_name[ (sizeof (pty_name) - 2)] = *c2;
194 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
195 {
196 if (access (tty_name, R_OK | W_OK) == 0)
197 {
198 *ttydev = strdup (tty_name);
199 return pfd;
200 }
201
202 close (pfd);
203 }
204 }
205 }
206 }
207#endif
208
209 return -1;
210}
211 181
212/*----------------------------------------------------------------------*/ 182/*----------------------------------------------------------------------*/
213/* 183/*
214 * Returns tty file descriptor, or -1 on failure 184 * Returns tty file descriptor, or -1 on failure
215 */ 185 */
216static int 186static int
217get_tty (char *ttydev) 187get_tty (char *ttydev)
218{ 188{
219 return open (ttydev, O_RDWR | O_NOCTTY, 0); 189 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
226static int 196static int
227control_tty (int fd_tty) 197control_tty (int fd_tty)
228{ 198{
229 int fd; 199 int fd;
230 200
231 /* ---------------------------------------- */
232 setsid (); 201 setsid ();
233 202
234 /* ---------------------------------------- */
235# if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 203#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
236 /* 204 /*
237 * Push STREAMS modules: 205 * Push STREAMS modules:
238 * ptem: pseudo-terminal hardware emulation module. 206 * ptem: pseudo-terminal hardware emulation module.
239 * ldterm: standard terminal line discipline. 207 * ldterm: standard terminal line discipline.
240 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 208 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
248 * documentation is really unclear about whether it is any close () on 216 * documentation is really unclear about whether it is any close () on
249 * the master side or the last close () - i.e. a proper STREAMS dismantling 217 * the master side or the last close () - i.e. a proper STREAMS dismantling
250 * close () - on the master side which causes a hang up to be sent 218 * close () - on the master side which causes a hang up to be sent
251 * through - Geoff Wing 219 * through - Geoff Wing
252 */ 220 */
253# ifdef HAVE_ISASTREAM 221#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
254 if (isastream (fd_tty) == 1) 222 if (isastream (fd_tty) == 1)
255# endif 223# endif
256 { 224 {
257 ioctl (fd_tty, I_PUSH, "ptem"); 225 ioctl (fd_tty, I_PUSH, "ptem");
258 ioctl (fd_tty, I_PUSH, "ldterm"); 226 ioctl (fd_tty, I_PUSH, "ldterm");
259 ioctl (fd_tty, I_PUSH, "ttcompat"); 227 ioctl (fd_tty, I_PUSH, "ttcompat");
260 } 228 }
261# endif 229#endif
262 /* ---------------------------------------- */ 230
231#ifdef TIOCSCTTY
263 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 232 ioctl (fd_tty, TIOCSCTTY, NULL);
264 /* ---------------------------------------- */ 233#else
234 fd = open (ttyname (fd_tty), O_RDWR);
235 if (fd >= 0)
236 close (fd);
237#endif
238
265 fd = open ("/dev/tty", O_WRONLY); 239 fd = open ("/dev/tty", O_WRONLY);
266 if (fd < 0) 240 if (fd < 0)
267 return -1; /* fatal */ 241 return -1; /* fatal */
242
268 close (fd); 243 close (fd);
269 /* ---------------------------------------- */
270 244
271 return 0; 245 return 0;
272} 246}
273 247
274void 248void
275rxvt_ptytty::close_tty () 249ptytty::close_tty ()
276{ 250{
277 if (tty < 0) 251 if (tty < 0)
278 return; 252 return;
279 253
280 close (tty); 254 close (tty);
281 tty = -1; 255 tty = -1;
282} 256}
283 257
284bool 258bool
285rxvt_ptytty::make_controlling_tty () 259ptytty::make_controlling_tty ()
286{ 260{
287 return control_tty (tty) >= 0; 261 return control_tty (tty) >= 0;
288} 262}
289 263
290void 264void
291rxvt_ptytty::set_utf8_mode (bool on) 265ptytty::set_utf8_mode (bool on)
292{ 266{
293#ifdef IUTF8 267#ifdef IUTF8
294 if (pty < 0) 268 if (pty < 0)
295 return; 269 return;
296 270
… …
312 } 286 }
313 } 287 }
314#endif 288#endif
315} 289}
316 290
317/////////////////////////////////////////////////////////////////////////////
318
319#ifndef NO_SETOWNER_TTYDEV
320static struct ttyconf { 291static struct ttyconf {
321 gid_t gid; 292 gid_t gid;
322 mode_t mode; 293 mode_t mode;
323 294
324 ttyconf () 295 ttyconf ()
325 { 296 {
326#ifdef TTY_GID_SUPPORT 297#ifdef TTY_GID_SUPPORT
327 struct group *gr = getgrnam ("tty"); 298 struct group *gr = getgrnam ("tty");
328 299
329 if (gr) 300 if (gr)
301 {
330 { /* change group ownership of tty to "tty" */ 302 /* change group ownership of tty to "tty" */
331 mode = S_IRUSR | S_IWUSR | S_IWGRP; 303 mode = S_IRUSR | S_IWUSR | S_IWGRP;
332 gid = gr->gr_gid; 304 gid = gr->gr_gid;
333 } 305 }
334 else 306 else
335#endif /* TTY_GID_SUPPORT */ 307#endif /* TTY_GID_SUPPORT */
336 { 308 {
337 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 309 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
338 gid = getgid (); 310 gid = 0;
339 } 311 }
340 } 312 }
341} ttyconf; 313} ttyconf;
342 314
343///////////////////////////////////////////////////////////////////////////// 315ptytty_unix::ptytty_unix ()
316{
317 name = 0;
318#if UTMP_SUPPORT
319 cmd_pid = 0;
320#endif
321}
322
323ptytty_unix::~ptytty_unix ()
324{
325#if UTMP_SUPPORT
326 logout ();
327#endif
328 put ();
329}
344 330
345void 331void
346rxvt_ptytty_unix::privileges (rxvt_privaction action) 332ptytty_unix::put ()
347{ 333{
348 if (!name || !*name) 334 if (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 } 335 {
370 else 336 chmod (name, RESTORE_TTY_MODE);
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); 337 chown (name, 0, ttyconf.gid);
381# endif
382
383 } 338 }
384 339
385 rxvt_privileges (IGNORE); 340 close_tty ();
386}
387#endif
388 341
389rxvt_ptytty_unix::rxvt_ptytty_unix () 342 if (pty >= 0)
390{ 343 close (pty);
344
345 free (name);
346
391 pty = tty = -1; 347 pty = tty = -1;
392 name = 0; 348 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} 349}
421 350
422bool 351bool
423rxvt_ptytty_unix::get () 352ptytty_unix::get ()
424{ 353{
425 /* get master (pty) */ 354 /* get master (pty) */
426 if ((pty = get_pty (&tty, &name)) < 0) 355 if ((pty = get_pty (&tty, &name)) < 0)
427 return false; 356 return false;
428 357
… …
430 359
431 /* get slave (tty) */ 360 /* get slave (tty) */
432 if (tty < 0) 361 if (tty < 0)
433 { 362 {
434#ifndef NO_SETOWNER_TTYDEV 363#ifndef NO_SETOWNER_TTYDEV
435 privileges (SAVE); 364 chown (name, getuid (), ttyconf.gid); /* fail silently */
365 chmod (name, ttyconf.mode);
366# ifdef HAVE_REVOKE
367 revoke (name);
368# endif
436#endif 369#endif
437 370
438 if ((tty = get_tty (name)) < 0) 371 if ((tty = get_tty (name)) < 0)
439 { 372 {
440 put (); 373 put ();
… …
443 } 376 }
444 377
445 return true; 378 return true;
446} 379}
447 380
448// a "factory" *g*
449rxvt_ptytty *rxvt_new_ptytty ()
450{
451 return new rxvt_ptytty_unix;
452}
453
454/*----------------------- end-of-file (C source) -----------------------*/
455

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